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freebsd-skq/sys/dev/vx/if_vx.c
Poul-Henning Kamp 46783fb897 Remove NBPF conditionality of bpf calls in most of our network drivers. 
This means that we will not have to have a bpf and a non-bpf version
of our driver modules.

This does not open any security hole, because the bpf core isn't loadable

The drivers left unchanged are the "cross platform" drivers where the respective
maintainers are urged to DTRT, whatever that may be.

Add a couple of missing FreeBSD tags.
1999-09-25 12:06:01 +00:00

1081 lines
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/*
* Copyright (c) 1994 Herb Peyerl <hpeyerl@novatel.ca>
* 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 Herb Peyerl.
* 4. The name of Herb Peyerl may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
*
* $FreeBSD$
*
*/
/*
* Created from if_ep.c driver by Fred Gray (fgray@rice.edu) to support
* the 3c590 family.
*/
/*
* Modified from the FreeBSD 1.1.5.1 version by:
* Andres Vega Garcia
* INRIA - Sophia Antipolis, France
* avega@sophia.inria.fr
*/
/*
* Promiscuous mode added and interrupt logic slightly changed
* to reduce the number of adapter failures. Transceiver select
* logic changed to use value from EEPROM. Autoconfiguration
* features added.
* Done by:
* Serge Babkin
* Chelindbank (Chelyabinsk, Russia)
* babkin@hq.icb.chel.su
*/
#include "vx.h"
#if NVX > 0
#if NVX < 4 /* These cost 4 bytes apiece, so give us 4 */
#undef NVX
#define NVX 4
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/ethernet.h>
#include <net/if_arp.h>
#include <net/bpf.h>
#include <machine/clock.h>
#include <dev/vx/if_vxreg.h>
#define ETHER_MAX_LEN 1518
#define ETHER_ADDR_LEN 6
struct vx_softc *vx_softc[NVX];
u_long vx_count; /* both PCI and EISA */
static struct connector_entry {
int bit;
char *name;
} conn_tab[VX_CONNECTORS] = {
#define CONNECTOR_UTP 0
{ 0x08, "utp"},
#define CONNECTOR_AUI 1
{ 0x20, "aui"},
/* dummy */
{ 0, "???"},
#define CONNECTOR_BNC 3
{ 0x10, "bnc"},
#define CONNECTOR_TX 4
{ 0x02, "tx"},
#define CONNECTOR_FX 5
{ 0x04, "fx"},
#define CONNECTOR_MII 6
{ 0x40, "mii"},
{ 0, "???"}
};
/* struct vx_softc *vxalloc __P((int)); */
/* void *vxfree __P((struct vx_softc *)); */
/* int vxattach __P((struct vx_softc *)); */
static void vxtxstat __P((struct vx_softc *));
static int vxstatus __P((struct vx_softc *));
static void vxinit __P((void *));
static int vxioctl __P((struct ifnet *, u_long, caddr_t));
static void vxstart __P((struct ifnet *ifp));
static void vxwatchdog __P((struct ifnet *));
static void vxreset __P((struct vx_softc *));
/* void vxstop __P((struct vx_softc *)); */
static void vxread __P((struct vx_softc *));
static struct mbuf *vxget __P((struct vx_softc *, u_int));
static void vxmbuffill __P((void *));
static void vxmbufempty __P((struct vx_softc *));
static void vxsetfilter __P((struct vx_softc *));
static void vxgetlink __P((struct vx_softc *));
static void vxsetlink __P((struct vx_softc *));
/* int vxbusyeeprom __P((struct vx_softc *)); */
struct vx_softc *
vxalloc(unit)
int unit;
{
struct vx_softc *sc;
if (unit >= NVX) {
printf("vx%d: unit number too high.\n", unit);
return NULL;
}
if (vx_softc[unit]) {
printf("vx%d: already allocated.\n", unit);
return NULL;
}
sc = malloc(sizeof(struct vx_softc), M_DEVBUF, M_NOWAIT);
if (sc == NULL) {
printf("vx%d: cannot malloc.\n", unit);
return NULL;
}
bzero(sc, sizeof(struct vx_softc));
callout_handle_init(&sc->ch);
vx_softc[unit] = sc;
sc->unit = unit;
return (sc);
}
void
vxfree(sc)
struct vx_softc *sc;
{
vx_softc[sc->unit] = NULL;
free(sc, M_DEVBUF);
return;
}
int
vxattach(sc)
struct vx_softc *sc;
{
struct ifnet *ifp = &sc->arpcom.ac_if;
int i;
GO_WINDOW(0);
outw(VX_COMMAND, GLOBAL_RESET);
VX_BUSY_WAIT;
vxgetlink(sc);
/*
* Read the station address from the eeprom
*/
GO_WINDOW(0);
for (i = 0; i < 3; i++) {
int x;
if (vxbusyeeprom(sc))
return 0;
outw(BASE + VX_W0_EEPROM_COMMAND, EEPROM_CMD_RD
| (EEPROM_OEM_ADDR_0 + i));
if (vxbusyeeprom(sc))
return 0;
x = inw(BASE + VX_W0_EEPROM_DATA);
sc->arpcom.ac_enaddr[(i << 1)] = x >> 8;
sc->arpcom.ac_enaddr[(i << 1) + 1] = x;
}
printf(" address %6D\n", sc->arpcom.ac_enaddr, ":");
ifp->if_unit = sc->unit;
ifp->if_name = "vx";
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_output = ether_output;
ifp->if_start = vxstart;
ifp->if_ioctl = vxioctl;
ifp->if_init = vxinit;
ifp->if_watchdog = vxwatchdog;
ifp->if_softc = sc;
if_attach(ifp);
ether_ifattach(ifp);
bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
sc->tx_start_thresh = 20; /* probably a good starting point. */
vxstop(sc);
return 1;
}
/*
* The order in here seems important. Otherwise we may not receive
* interrupts. ?!
*/
static void
vxinit(xsc)
void *xsc;
{
struct vx_softc *sc = (struct vx_softc *) xsc;
struct ifnet *ifp = &sc->arpcom.ac_if;
int i;
VX_BUSY_WAIT;
GO_WINDOW(2);
for (i = 0; i < 6; i++) /* Reload the ether_addr. */
outb(BASE + VX_W2_ADDR_0 + i, sc->arpcom.ac_enaddr[i]);
outw(BASE + VX_COMMAND, RX_RESET);
VX_BUSY_WAIT;
outw(BASE + VX_COMMAND, TX_RESET);
VX_BUSY_WAIT;
GO_WINDOW(1); /* Window 1 is operating window */
for (i = 0; i < 31; i++)
inb(BASE + VX_W1_TX_STATUS);
outw(BASE + VX_COMMAND,SET_RD_0_MASK | S_CARD_FAILURE |
S_RX_COMPLETE | S_TX_COMPLETE | S_TX_AVAIL);
outw(BASE + VX_COMMAND,SET_INTR_MASK | S_CARD_FAILURE |
S_RX_COMPLETE | S_TX_COMPLETE | S_TX_AVAIL);
/*
* Attempt to get rid of any stray interrupts that occured during
* configuration. On the i386 this isn't possible because one may
* already be queued. However, a single stray interrupt is
* unimportant.
*/
outw(BASE + VX_COMMAND, ACK_INTR | 0xff);
vxsetfilter(sc);
vxsetlink(sc);
outw(BASE + VX_COMMAND, RX_ENABLE);
outw(BASE + VX_COMMAND, TX_ENABLE);
vxmbuffill((caddr_t) sc);
/* Interface is now `running', with no output active. */
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
/* Attempt to start output, if any. */
vxstart(ifp);
}
static void
vxsetfilter(sc)
struct vx_softc *sc;
{
register struct ifnet *ifp = &sc->arpcom.ac_if;
GO_WINDOW(1); /* Window 1 is operating window */
outw(BASE + VX_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL | FIL_BRDCST |
FIL_MULTICAST |
((ifp->if_flags & IFF_PROMISC) ? FIL_PROMISC : 0 ));
}
static void
vxgetlink(sc)
struct vx_softc *sc;
{
int n, k;
GO_WINDOW(3);
sc->vx_connectors = inw(BASE + VX_W3_RESET_OPT) & 0x7f;
for (n = 0, k = 0; k < VX_CONNECTORS; k++) {
if (sc->vx_connectors & conn_tab[k].bit) {
if (n > 0) {
printf("/");
}
printf(conn_tab[k].name);
n++;
}
}
if (sc->vx_connectors == 0) {
printf("no connectors!");
return;
}
GO_WINDOW(3);
sc->vx_connector = (inl(BASE + VX_W3_INTERNAL_CFG)
& INTERNAL_CONNECTOR_MASK)
>> INTERNAL_CONNECTOR_BITS;
if (sc->vx_connector & 0x10) {
sc->vx_connector &= 0x0f;
printf("[*%s*]", conn_tab[(int)sc->vx_connector].name);
printf(": disable 'auto select' with DOS util!");
} else {
printf("[*%s*]", conn_tab[(int)sc->vx_connector].name);
}
}
static void
vxsetlink(sc)
struct vx_softc *sc;
{
register struct ifnet *ifp = &sc->arpcom.ac_if;
int i, j, k;
char *reason, *warning;
static short prev_flags;
static char prev_conn = -1;
if (prev_conn == -1) {
prev_conn = sc->vx_connector;
}
/*
* S.B.
*
* Now behavior was slightly changed:
*
* if any of flags link[0-2] is used and its connector is
* physically present the following connectors are used:
*
* link0 - AUI * highest precedence
* link1 - BNC
* link2 - UTP * lowest precedence
*
* If none of them is specified then
* connector specified in the EEPROM is used
* (if present on card or UTP if not).
*/
i = sc->vx_connector; /* default in EEPROM */
reason = "default";
warning = 0;
if (ifp->if_flags & IFF_LINK0) {
if (sc->vx_connectors & conn_tab[CONNECTOR_AUI].bit) {
i = CONNECTOR_AUI;
reason = "link0";
} else {
warning = "aui not present! (link0)";
}
} else if (ifp->if_flags & IFF_LINK1) {
if (sc->vx_connectors & conn_tab[CONNECTOR_BNC].bit) {
i = CONNECTOR_BNC;
reason = "link1";
} else {
warning = "bnc not present! (link1)";
}
} else if (ifp->if_flags & IFF_LINK2) {
if (sc->vx_connectors & conn_tab[CONNECTOR_UTP].bit) {
i = CONNECTOR_UTP;
reason = "link2";
} else {
warning = "utp not present! (link2)";
}
} else if ((sc->vx_connectors & conn_tab[(int)sc->vx_connector].bit) == 0) {
warning = "strange connector type in EEPROM.";
reason = "forced";
i = CONNECTOR_UTP;
}
/* Avoid unnecessary message. */
k = (prev_flags ^ ifp->if_flags) & (IFF_LINK0 | IFF_LINK1 | IFF_LINK2);
if ((k != 0) || (prev_conn != i)) {
if (warning != 0) {
printf("vx%d: warning: %s\n", sc->unit, warning);
}
printf("vx%d: selected %s. (%s)\n",
sc->unit, conn_tab[i].name, reason);
}
/* Set the selected connector. */
GO_WINDOW(3);
j = inl(BASE + VX_W3_INTERNAL_CFG) & ~INTERNAL_CONNECTOR_MASK;
outl(BASE + VX_W3_INTERNAL_CFG, j | (i <<INTERNAL_CONNECTOR_BITS));
/* First, disable all. */
outw(BASE + VX_COMMAND, STOP_TRANSCEIVER);
DELAY(800);
GO_WINDOW(4);
outw(BASE + VX_W4_MEDIA_TYPE, 0);
/* Second, enable the selected one. */
switch(i) {
case CONNECTOR_UTP:
GO_WINDOW(4);
outw(BASE + VX_W4_MEDIA_TYPE, ENABLE_UTP);
break;
case CONNECTOR_BNC:
outw(BASE + VX_COMMAND, START_TRANSCEIVER);
DELAY(800);
break;
case CONNECTOR_TX:
case CONNECTOR_FX:
GO_WINDOW(4);
outw(BASE + VX_W4_MEDIA_TYPE, LINKBEAT_ENABLE);
break;
default: /* AUI and MII fall here */
break;
}
GO_WINDOW(1);
prev_flags = ifp->if_flags;
prev_conn = i;
}
static void
vxstart(ifp)
struct ifnet *ifp;
{
register struct vx_softc *sc = vx_softc[ifp->if_unit];
register struct mbuf *m, *m0;
int sh, len, pad;
/* Don't transmit if interface is busy or not running */
if ((sc->arpcom.ac_if.if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING)
return;
startagain:
/* Sneak a peek at the next packet */
m0 = ifp->if_snd.ifq_head;
if (m0 == 0) {
return;
}
/* We need to use m->m_pkthdr.len, so require the header */
if ((m0->m_flags & M_PKTHDR) == 0)
panic("vxstart: no header mbuf");
len = m0->m_pkthdr.len;
pad = (4 - len) & 3;
/*
* The 3c509 automatically pads short packets to minimum ethernet length,
* but we drop packets that are too large. Perhaps we should truncate
* them instead?
*/
if (len + pad > ETHER_MAX_LEN) {
/* packet is obviously too large: toss it */
++ifp->if_oerrors;
IF_DEQUEUE(&ifp->if_snd, m0);
m_freem(m0);
goto readcheck;
}
VX_BUSY_WAIT;
if (inw(BASE + VX_W1_FREE_TX) < len + pad + 4) {
outw(BASE + VX_COMMAND, SET_TX_AVAIL_THRESH | ((len + pad + 4) >> 2));
/* not enough room in FIFO */
if (inw(BASE + VX_W1_FREE_TX) < len + pad + 4) { /* make sure */
ifp->if_flags |= IFF_OACTIVE;
ifp->if_timer = 1;
return;
}
}
outw(BASE + VX_COMMAND, SET_TX_AVAIL_THRESH | (8188 >> 2));
IF_DEQUEUE(&ifp->if_snd, m0);
if (m0 == 0) { /* not really needed */
return;
}
VX_BUSY_WAIT;
outw(BASE + VX_COMMAND, SET_TX_START_THRESH |
((len / 4 + sc->tx_start_thresh) >> 2));
if (sc->arpcom.ac_if.if_bpf) {
bpf_mtap(&sc->arpcom.ac_if, m0);
}
/*
* Do the output at splhigh() so that an interrupt from another device
* won't cause a FIFO underrun.
*/
sh = splhigh();
outl(BASE + VX_W1_TX_PIO_WR_1, len | TX_INDICATE);
for (m = m0; m != 0;) {
if (m->m_len > 3)
outsl(BASE + VX_W1_TX_PIO_WR_1, mtod(m, caddr_t), m->m_len / 4);
if (m->m_len & 3)
outsb(BASE + VX_W1_TX_PIO_WR_1,
mtod(m, caddr_t) + (m->m_len & ~3) , m->m_len & 3);
MFREE(m, m0);
m = m0;
}
while (pad--)
outb(BASE + VX_W1_TX_PIO_WR_1, 0); /* Padding */
splx(sh);
++ifp->if_opackets;
ifp->if_timer = 1;
readcheck:
if ((inw(BASE + VX_W1_RX_STATUS) & ERR_INCOMPLETE) == 0) {
/* We received a complete packet. */
if ((inw(BASE + VX_STATUS) & S_INTR_LATCH) == 0) {
/*
* No interrupt, read the packet and continue
* Is this supposed to happen? Is my motherboard
* completely busted?
*/
vxread(sc);
} else
/* Got an interrupt, return so that it gets serviced. */
return;
} else {
/* Check if we are stuck and reset [see XXX comment] */
if (vxstatus(sc)) {
if (ifp->if_flags & IFF_DEBUG)
printf("vx%d: adapter reset\n", ifp->if_unit);
vxreset(sc);
}
}
goto startagain;
}
/*
* XXX: The 3c509 card can get in a mode where both the fifo status bit
* FIFOS_RX_OVERRUN and the status bit ERR_INCOMPLETE are set
* We detect this situation and we reset the adapter.
* It happens at times when there is a lot of broadcast traffic
* on the cable (once in a blue moon).
*/
static int
vxstatus(sc)
struct vx_softc *sc;
{
int fifost;
/*
* Check the FIFO status and act accordingly
*/
GO_WINDOW(4);
fifost = inw(BASE + VX_W4_FIFO_DIAG);
GO_WINDOW(1);
if (fifost & FIFOS_RX_UNDERRUN) {
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("vx%d: RX underrun\n", sc->unit);
vxreset(sc);
return 0;
}
if (fifost & FIFOS_RX_STATUS_OVERRUN) {
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("vx%d: RX Status overrun\n", sc->unit);
return 1;
}
if (fifost & FIFOS_RX_OVERRUN) {
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("vx%d: RX overrun\n", sc->unit);
return 1;
}
if (fifost & FIFOS_TX_OVERRUN) {
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("vx%d: TX overrun\n", sc->unit);
vxreset(sc);
return 0;
}
return 0;
}
static void
vxtxstat(sc)
struct vx_softc *sc;
{
int i;
/*
* We need to read+write TX_STATUS until we get a 0 status
* in order to turn off the interrupt flag.
*/
while ((i = inb(BASE + VX_W1_TX_STATUS)) & TXS_COMPLETE) {
outb(BASE + VX_W1_TX_STATUS, 0x0);
if (i & TXS_JABBER) {
++sc->arpcom.ac_if.if_oerrors;
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("vx%d: jabber (%x)\n", sc->unit, i);
vxreset(sc);
} else if (i & TXS_UNDERRUN) {
++sc->arpcom.ac_if.if_oerrors;
if (sc->arpcom.ac_if.if_flags & IFF_DEBUG)
printf("vx%d: fifo underrun (%x) @%d\n",
sc->unit, i, sc->tx_start_thresh);
if (sc->tx_succ_ok < 100)
sc->tx_start_thresh = min(ETHER_MAX_LEN, sc->tx_start_thresh + 20);
sc->tx_succ_ok = 0;
vxreset(sc);
} else if (i & TXS_MAX_COLLISION) {
++sc->arpcom.ac_if.if_collisions;
outw(BASE + VX_COMMAND, TX_ENABLE);
sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
} else
sc->tx_succ_ok = (sc->tx_succ_ok+1) & 127;
}
}
void
vxintr(voidsc)
void *voidsc;
{
register short status;
struct vx_softc *sc = voidsc;
struct ifnet *ifp = &sc->arpcom.ac_if;
for (;;) {
outw(BASE + VX_COMMAND, C_INTR_LATCH);
status = inw(BASE + VX_STATUS);
if ((status & (S_TX_COMPLETE | S_TX_AVAIL |
S_RX_COMPLETE | S_CARD_FAILURE)) == 0)
break;
/*
* Acknowledge any interrupts. It's important that we do this
* first, since there would otherwise be a race condition.
* Due to the i386 interrupt queueing, we may get spurious
* interrupts occasionally.
*/
outw(BASE + VX_COMMAND, ACK_INTR | status);
if (status & S_RX_COMPLETE)
vxread(sc);
if (status & S_TX_AVAIL) {
ifp->if_timer = 0;
sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
vxstart(&sc->arpcom.ac_if);
}
if (status & S_CARD_FAILURE) {
printf("vx%d: adapter failure (%x)\n", sc->unit, status);
ifp->if_timer = 0;
vxreset(sc);
return;
}
if (status & S_TX_COMPLETE) {
ifp->if_timer = 0;
vxtxstat(sc);
vxstart(ifp);
}
}
/* no more interrupts */
return;
}
static void
vxread(sc)
struct vx_softc *sc;
{
struct ifnet *ifp = &sc->arpcom.ac_if;
struct mbuf *m;
struct ether_header *eh;
u_int len;
len = inw(BASE + VX_W1_RX_STATUS);
again:
if (ifp->if_flags & IFF_DEBUG) {
int err = len & ERR_MASK;
char *s = NULL;
if (len & ERR_INCOMPLETE)
s = "incomplete packet";
else if (err == ERR_OVERRUN)
s = "packet overrun";
else if (err == ERR_RUNT)
s = "runt packet";
else if (err == ERR_ALIGNMENT)
s = "bad alignment";
else if (err == ERR_CRC)
s = "bad crc";
else if (err == ERR_OVERSIZE)
s = "oversized packet";
else if (err == ERR_DRIBBLE)
s = "dribble bits";
if (s)
printf("vx%d: %s\n", sc->unit, s);
}
if (len & ERR_INCOMPLETE)
return;
if (len & ERR_RX) {
++ifp->if_ierrors;
goto abort;
}
len &= RX_BYTES_MASK; /* Lower 11 bits = RX bytes. */
/* Pull packet off interface. */
m = vxget(sc, len);
if (m == 0) {
ifp->if_ierrors++;
goto abort;
}
++ifp->if_ipackets;
/* We assume the header fit entirely in one mbuf. */
eh = mtod(m, struct ether_header *);
/*
* Check if there's a BPF listener on this interface.
* If so, hand off the raw packet to BPF.
*/
if (sc->arpcom.ac_if.if_bpf) {
bpf_mtap(&sc->arpcom.ac_if, m);
}
/*
* XXX: Some cards seem to be in promiscous mode all the time.
* we need to make sure we only get our own stuff always.
* bleah!
*/
if ((eh->ether_dhost[0] & 1) == 0 && /* !mcast and !bcast */
bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr,
sizeof(eh->ether_dhost)) != 0) {
m_freem(m);
return;
}
/* We assume the header fit entirely in one mbuf. */
m_adj(m, sizeof(struct ether_header));
ether_input(ifp, eh, m);
/*
* In periods of high traffic we can actually receive enough
* packets so that the fifo overrun bit will be set at this point,
* even though we just read a packet. In this case we
* are not going to receive any more interrupts. We check for
* this condition and read again until the fifo is not full.
* We could simplify this test by not using vxstatus(), but
* rechecking the RX_STATUS register directly. This test could
* result in unnecessary looping in cases where there is a new
* packet but the fifo is not full, but it will not fix the
* stuck behavior.
*
* Even with this improvement, we still get packet overrun errors
* which are hurting performance. Maybe when I get some more time
* I'll modify vxread() so that it can handle RX_EARLY interrupts.
*/
if (vxstatus(sc)) {
len = inw(BASE + VX_W1_RX_STATUS);
/* Check if we are stuck and reset [see XXX comment] */
if (len & ERR_INCOMPLETE) {
if (ifp->if_flags & IFF_DEBUG)
printf("vx%d: adapter reset\n", sc->unit);
vxreset(sc);
return;
}
goto again;
}
return;
abort:
outw(BASE + VX_COMMAND, RX_DISCARD_TOP_PACK);
}
static struct mbuf *
vxget(sc, totlen)
struct vx_softc *sc;
u_int totlen;
{
struct ifnet *ifp = &sc->arpcom.ac_if;
struct mbuf *top, **mp, *m;
int len;
int sh;
m = sc->mb[sc->next_mb];
sc->mb[sc->next_mb] = 0;
if (m == 0) {
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == 0)
return 0;
} else {
/* If the queue is no longer full, refill. */
if (sc->last_mb == sc->next_mb && sc->buffill_pending == 0) {
sc->ch = timeout(vxmbuffill, sc, 1);
sc->buffill_pending = 1;
}
/* Convert one of our saved mbuf's. */
sc->next_mb = (sc->next_mb + 1) % MAX_MBS;
m->m_data = m->m_pktdat;
m->m_flags = M_PKTHDR;
}
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = totlen;
len = MHLEN;
top = 0;
mp = &top;
/*
* We read the packet at splhigh() so that an interrupt from another
* device doesn't cause the card's buffer to overflow while we're
* reading it. We may still lose packets at other times.
*/
sh = splhigh();
/*
* Since we don't set allowLargePackets bit in MacControl register,
* we can assume that totlen <= 1500bytes.
* The while loop will be performed iff we have a packet with
* MLEN < m_len < MINCLSIZE.
*/
while (totlen > 0) {
if (top) {
m = sc->mb[sc->next_mb];
sc->mb[sc->next_mb] = 0;
if (m == 0) {
MGET(m, M_DONTWAIT, MT_DATA);
if (m == 0) {
splx(sh);
m_freem(top);
return 0;
}
} else {
sc->next_mb = (sc->next_mb + 1) % MAX_MBS;
}
len = MLEN;
}
if (totlen >= MINCLSIZE) {
MCLGET(m, M_DONTWAIT);
if (m->m_flags & M_EXT)
len = MCLBYTES;
}
len = min(totlen, len);
if (len > 3)
insl(BASE + VX_W1_RX_PIO_RD_1, mtod(m, u_int32_t *), len / 4);
if (len & 3) {
insb(BASE + VX_W1_RX_PIO_RD_1, mtod(m, u_int8_t *) + (len & ~3),
len & 3);
}
m->m_len = len;
totlen -= len;
*mp = m;
mp = &m->m_next;
}
outw(BASE +VX_COMMAND, RX_DISCARD_TOP_PACK);
splx(sh);
return top;
}
static int
vxioctl(ifp, cmd, data)
register struct ifnet *ifp;
u_long cmd;
caddr_t data;
{
struct vx_softc *sc = vx_softc[ifp->if_unit];
struct ifreq *ifr = (struct ifreq *) data;
int s, error = 0;
s = splimp();
switch (cmd) {
case SIOCSIFADDR:
case SIOCGIFADDR:
ether_ioctl(ifp, cmd, data);
break;
case SIOCSIFFLAGS:
if ((ifp->if_flags & IFF_UP) == 0 &&
(ifp->if_flags & IFF_RUNNING) != 0) {
/*
* If interface is marked up and it is stopped, then
* start it.
*/
vxstop(sc);
ifp->if_flags &= ~IFF_RUNNING;
} else if ((ifp->if_flags & IFF_UP) != 0 &&
(ifp->if_flags & IFF_RUNNING) == 0) {
/*
* If interface is marked up and it is stopped, then
* start it.
*/
vxinit(sc);
} else {
/*
* deal with flags changes:
* IFF_MULTICAST, IFF_PROMISC,
* IFF_LINK0, IFF_LINK1,
*/
vxsetfilter(sc);
vxsetlink(sc);
}
break;
case SIOCSIFMTU:
/*
* Set the interface MTU.
*/
if (ifr->ifr_mtu > ETHERMTU) {
error = EINVAL;
} else {
ifp->if_mtu = ifr->ifr_mtu;
}
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
/*
* Multicast list has changed; set the hardware filter
* accordingly.
*/
vxreset(sc);
error = 0;
break;
default:
error = EINVAL;
}
splx(s);
return (error);
}
static void
vxreset(sc)
struct vx_softc *sc;
{
int s;
s = splimp();
vxstop(sc);
vxinit(sc);
splx(s);
}
static void
vxwatchdog(ifp)
struct ifnet *ifp;
{
struct vx_softc *sc = vx_softc[ifp->if_unit];
if (ifp->if_flags & IFF_DEBUG)
printf("vx%d: device timeout\n", ifp->if_unit);
ifp->if_flags &= ~IFF_OACTIVE;
vxstart(ifp);
vxintr(sc);
}
void
vxstop(sc)
struct vx_softc *sc;
{
struct ifnet *ifp = &sc->arpcom.ac_if;
ifp->if_timer = 0;
outw(BASE + VX_COMMAND, RX_DISABLE);
outw(BASE + VX_COMMAND, RX_DISCARD_TOP_PACK);
VX_BUSY_WAIT;
outw(BASE + VX_COMMAND, TX_DISABLE);
outw(BASE + VX_COMMAND, STOP_TRANSCEIVER);
DELAY(800);
outw(BASE + VX_COMMAND, RX_RESET);
VX_BUSY_WAIT;
outw(BASE + VX_COMMAND, TX_RESET);
VX_BUSY_WAIT;
outw(BASE + VX_COMMAND, C_INTR_LATCH);
outw(BASE + VX_COMMAND, SET_RD_0_MASK);
outw(BASE + VX_COMMAND, SET_INTR_MASK);
outw(BASE + VX_COMMAND, SET_RX_FILTER);
vxmbufempty(sc);
}
int
vxbusyeeprom(sc)
struct vx_softc *sc;
{
int j, i = 100;
while (i--) {
j = inw(BASE + VX_W0_EEPROM_COMMAND);
if (j & EEPROM_BUSY)
DELAY(100);
else
break;
}
if (!i) {
printf("vx%d: eeprom failed to come ready\n", sc->unit);
return (1);
}
return (0);
}
static void
vxmbuffill(sp)
void *sp;
{
struct vx_softc *sc = (struct vx_softc *) sp;
int s, i;
s = splimp();
i = sc->last_mb;
do {
if (sc->mb[i] == NULL)
MGET(sc->mb[i], M_DONTWAIT, MT_DATA);
if (sc->mb[i] == NULL)
break;
i = (i + 1) % MAX_MBS;
} while (i != sc->next_mb);
sc->last_mb = i;
/* If the queue was not filled, try again. */
if (sc->last_mb != sc->next_mb) {
sc->ch = timeout(vxmbuffill, sc, 1);
sc->buffill_pending = 1;
} else {
sc->buffill_pending = 0;
}
splx(s);
}
static void
vxmbufempty(sc)
struct vx_softc *sc;
{
int s, i;
s = splimp();
for (i = 0; i < MAX_MBS; i++) {
if (sc->mb[i]) {
m_freem(sc->mb[i]);
sc->mb[i] = NULL;
}
}
sc->last_mb = sc->next_mb = 0;
if (sc->buffill_pending != 0)
untimeout(vxmbuffill, sc, sc->ch);
splx(s);
}
#endif /* NVX > 0 */
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