df5e198723
before adding/removing packets from the queue. Also, the if_obytes and if_omcasts fields should only be manipulated under protection of the mutex. IF_ENQUEUE, IF_PREPEND, and IF_DEQUEUE perform all necessary locking on the queue. An IF_LOCK macro is provided, as well as the old (mutex-less) versions of the macros in the form _IF_ENQUEUE, _IF_QFULL, for code which needs them, but their use is discouraged. Two new macros are introduced: IF_DRAIN() to drain a queue, and IF_HANDOFF, which takes care of locking/enqueue, and also statistics updating/start if necessary.
785 lines
18 KiB
C
785 lines
18 KiB
C
/*-
|
|
* Copyright (c) 1997 Poul-Henning Kamp
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR OR CONTRIBUTORS 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.
|
|
*
|
|
* From Id: lpt.c,v 1.55.2.1 1996/11/12 09:08:38 phk Exp
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Parallel port TCP/IP interfaces added. I looked at the driver from
|
|
* MACH but this is a complete rewrite, and btw. incompatible, and it
|
|
* should perform better too. I have never run the MACH driver though.
|
|
*
|
|
* This driver sends two bytes (0x08, 0x00) in front of each packet,
|
|
* to allow us to distinguish another format later.
|
|
*
|
|
* Now added an Linux/Crynwr compatibility mode which is enabled using
|
|
* IF_LINK0 - Tim Wilkinson.
|
|
*
|
|
* TODO:
|
|
* Make HDLC/PPP mode, use IF_LLC1 to enable.
|
|
*
|
|
* Connect the two computers using a Laplink parallel cable to use this
|
|
* feature:
|
|
*
|
|
* +----------------------------------------+
|
|
* |A-name A-End B-End Descr. Port/Bit |
|
|
* +----------------------------------------+
|
|
* |DATA0 2 15 Data 0/0x01 |
|
|
* |-ERROR 15 2 1/0x08 |
|
|
* +----------------------------------------+
|
|
* |DATA1 3 13 Data 0/0x02 |
|
|
* |+SLCT 13 3 1/0x10 |
|
|
* +----------------------------------------+
|
|
* |DATA2 4 12 Data 0/0x04 |
|
|
* |+PE 12 4 1/0x20 |
|
|
* +----------------------------------------+
|
|
* |DATA3 5 10 Strobe 0/0x08 |
|
|
* |-ACK 10 5 1/0x40 |
|
|
* +----------------------------------------+
|
|
* |DATA4 6 11 Data 0/0x10 |
|
|
* |BUSY 11 6 1/~0x80 |
|
|
* +----------------------------------------+
|
|
* |GND 18-25 18-25 GND - |
|
|
* +----------------------------------------+
|
|
*
|
|
* Expect transfer-rates up to 75 kbyte/sec.
|
|
*
|
|
* If GCC could correctly grok
|
|
* register int port asm("edx")
|
|
* the code would be cleaner
|
|
*
|
|
* Poul-Henning Kamp <phk@freebsd.org>
|
|
*/
|
|
|
|
/*
|
|
* Update for ppbus, PLIP support only - Nicolas Souchu
|
|
*/
|
|
|
|
#include "opt_plip.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/module.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/sockio.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <machine/resource.h>
|
|
#include <sys/rman.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_types.h>
|
|
#include <net/netisr.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_var.h>
|
|
|
|
#include <net/bpf.h>
|
|
|
|
#include <dev/ppbus/ppbconf.h>
|
|
#include "ppbus_if.h"
|
|
#include <dev/ppbus/ppbio.h>
|
|
|
|
#ifndef LPMTU /* MTU for the lp# interfaces */
|
|
#define LPMTU 1500
|
|
#endif
|
|
|
|
#ifndef LPMAXSPIN1 /* DELAY factor for the lp# interfaces */
|
|
#define LPMAXSPIN1 8000 /* Spinning for remote intr to happen */
|
|
#endif
|
|
|
|
#ifndef LPMAXSPIN2 /* DELAY factor for the lp# interfaces */
|
|
#define LPMAXSPIN2 500 /* Spinning for remote handshake to happen */
|
|
#endif
|
|
|
|
#ifndef LPMAXERRS /* Max errors before !RUNNING */
|
|
#define LPMAXERRS 100
|
|
#endif
|
|
|
|
#define CLPIPHDRLEN 14 /* We send dummy ethernet addresses (two) + packet type in front of packet */
|
|
#define CLPIP_SHAKE 0x80 /* This bit toggles between nibble reception */
|
|
#define MLPIPHDRLEN CLPIPHDRLEN
|
|
|
|
#define LPIPHDRLEN 2 /* We send 0x08, 0x00 in front of packet */
|
|
#define LPIP_SHAKE 0x40 /* This bit toggles between nibble reception */
|
|
#if !defined(MLPIPHDRLEN) || LPIPHDRLEN > MLPIPHDRLEN
|
|
#define MLPIPHDRLEN LPIPHDRLEN
|
|
#endif
|
|
|
|
#define LPIPTBLSIZE 256 /* Size of octet translation table */
|
|
|
|
#define lprintf if (lptflag) printf
|
|
|
|
#ifdef PLIP_DEBUG
|
|
static int volatile lptflag = 1;
|
|
#else
|
|
static int volatile lptflag = 0;
|
|
#endif
|
|
|
|
struct lp_data {
|
|
unsigned short lp_unit;
|
|
|
|
struct ifnet sc_if;
|
|
u_char *sc_ifbuf;
|
|
int sc_iferrs;
|
|
|
|
struct resource *res_irq;
|
|
};
|
|
|
|
/* Tables for the lp# interface */
|
|
static u_char *txmith;
|
|
#define txmitl (txmith+(1*LPIPTBLSIZE))
|
|
#define trecvh (txmith+(2*LPIPTBLSIZE))
|
|
#define trecvl (txmith+(3*LPIPTBLSIZE))
|
|
|
|
static u_char *ctxmith;
|
|
#define ctxmitl (ctxmith+(1*LPIPTBLSIZE))
|
|
#define ctrecvh (ctxmith+(2*LPIPTBLSIZE))
|
|
#define ctrecvl (ctxmith+(3*LPIPTBLSIZE))
|
|
|
|
/* Functions for the lp# interface */
|
|
static int lpinittables(void);
|
|
static int lpioctl(struct ifnet *, u_long, caddr_t);
|
|
static int lpoutput(struct ifnet *, struct mbuf *, struct sockaddr *,
|
|
struct rtentry *);
|
|
static void lp_intr(void *);
|
|
|
|
#define DEVTOSOFTC(dev) \
|
|
((struct lp_data *)device_get_softc(dev))
|
|
#define UNITOSOFTC(unit) \
|
|
((struct lp_data *)devclass_get_softc(lp_devclass, (unit)))
|
|
#define UNITODEVICE(unit) \
|
|
(devclass_get_device(lp_devclass, (unit)))
|
|
|
|
static devclass_t lp_devclass;
|
|
|
|
static void
|
|
lp_identify(driver_t *driver, device_t parent)
|
|
{
|
|
|
|
BUS_ADD_CHILD(parent, 0, "plip", 0);
|
|
}
|
|
/*
|
|
* lpprobe()
|
|
*/
|
|
static int
|
|
lp_probe(device_t dev)
|
|
{
|
|
device_t ppbus = device_get_parent(dev);
|
|
struct lp_data *lp;
|
|
int zero = 0;
|
|
uintptr_t irq;
|
|
|
|
lp = DEVTOSOFTC(dev);
|
|
bzero(lp, sizeof(struct lp_data));
|
|
|
|
/* retrieve the ppbus irq */
|
|
BUS_READ_IVAR(ppbus, dev, PPBUS_IVAR_IRQ, &irq);
|
|
|
|
/* if we haven't interrupts, the probe fails */
|
|
if (irq == -1) {
|
|
device_printf(dev, "not an interrupt driven port, failed.\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
/* reserve the interrupt resource, expecting irq is available to continue */
|
|
lp->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &zero, irq, irq, 1,
|
|
RF_SHAREABLE);
|
|
if (lp->res_irq == 0) {
|
|
device_printf(dev, "cannot reserve interrupt, failed.\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
/*
|
|
* lp dependent initialisation.
|
|
*/
|
|
lp->lp_unit = device_get_unit(dev);
|
|
|
|
device_set_desc(dev, "PLIP network interface");
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
lp_attach (device_t dev)
|
|
{
|
|
struct lp_data *lp = DEVTOSOFTC(dev);
|
|
struct ifnet *ifp = &lp->sc_if;
|
|
|
|
ifp->if_softc = lp;
|
|
ifp->if_name = "lp";
|
|
ifp->if_unit = device_get_unit(dev);
|
|
ifp->if_mtu = LPMTU;
|
|
ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT | IFF_MULTICAST;
|
|
ifp->if_ioctl = lpioctl;
|
|
ifp->if_output = lpoutput;
|
|
ifp->if_type = IFT_PARA;
|
|
ifp->if_hdrlen = 0;
|
|
ifp->if_addrlen = 0;
|
|
ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
|
|
if_attach(ifp);
|
|
|
|
bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));
|
|
|
|
return (0);
|
|
}
|
|
/*
|
|
* Build the translation tables for the LPIP (BSD unix) protocol.
|
|
* We don't want to calculate these nasties in our tight loop, so we
|
|
* precalculate them when we initialize.
|
|
*/
|
|
static int
|
|
lpinittables (void)
|
|
{
|
|
int i;
|
|
|
|
if (!txmith)
|
|
txmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT);
|
|
|
|
if (!txmith)
|
|
return 1;
|
|
|
|
if (!ctxmith)
|
|
ctxmith = malloc(4*LPIPTBLSIZE, M_DEVBUF, M_NOWAIT);
|
|
|
|
if (!ctxmith)
|
|
return 1;
|
|
|
|
for (i=0; i < LPIPTBLSIZE; i++) {
|
|
ctxmith[i] = (i & 0xF0) >> 4;
|
|
ctxmitl[i] = 0x10 | (i & 0x0F);
|
|
ctrecvh[i] = (i & 0x78) << 1;
|
|
ctrecvl[i] = (i & 0x78) >> 3;
|
|
}
|
|
|
|
for (i=0; i < LPIPTBLSIZE; i++) {
|
|
txmith[i] = ((i & 0x80) >> 3) | ((i & 0x70) >> 4) | 0x08;
|
|
txmitl[i] = ((i & 0x08) << 1) | (i & 0x07);
|
|
trecvh[i] = ((~i) & 0x80) | ((i & 0x38) << 1);
|
|
trecvl[i] = (((~i) & 0x80) >> 4) | ((i & 0x38) >> 3);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Process an ioctl request.
|
|
*/
|
|
|
|
static int
|
|
lpioctl (struct ifnet *ifp, u_long cmd, caddr_t data)
|
|
{
|
|
device_t dev = UNITODEVICE(ifp->if_unit);
|
|
device_t ppbus = device_get_parent(dev);
|
|
struct lp_data *sc = DEVTOSOFTC(dev);
|
|
struct ifaddr *ifa = (struct ifaddr *)data;
|
|
struct ifreq *ifr = (struct ifreq *)data;
|
|
u_char *ptr;
|
|
void *ih;
|
|
int error;
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCSIFDSTADDR:
|
|
case SIOCAIFADDR:
|
|
case SIOCSIFADDR:
|
|
if (ifa->ifa_addr->sa_family != AF_INET)
|
|
return EAFNOSUPPORT;
|
|
|
|
ifp->if_flags |= IFF_UP;
|
|
/* FALLTHROUGH */
|
|
case SIOCSIFFLAGS:
|
|
if ((!(ifp->if_flags & IFF_UP)) && (ifp->if_flags & IFF_RUNNING)) {
|
|
|
|
ppb_wctr(ppbus, 0x00);
|
|
ifp->if_flags &= ~IFF_RUNNING;
|
|
|
|
/* IFF_UP is not set, try to release the bus anyway */
|
|
ppb_release_bus(ppbus, dev);
|
|
break;
|
|
}
|
|
if (((ifp->if_flags & IFF_UP)) && (!(ifp->if_flags & IFF_RUNNING))) {
|
|
|
|
/* XXX
|
|
* Should the request be interruptible?
|
|
*/
|
|
if ((error = ppb_request_bus(ppbus, dev, PPB_WAIT|PPB_INTR)))
|
|
return (error);
|
|
|
|
/* Now IFF_UP means that we own the bus */
|
|
|
|
ppb_set_mode(ppbus, PPB_COMPATIBLE);
|
|
|
|
if (lpinittables()) {
|
|
ppb_release_bus(ppbus, dev);
|
|
return ENOBUFS;
|
|
}
|
|
|
|
sc->sc_ifbuf = malloc(sc->sc_if.if_mtu + MLPIPHDRLEN,
|
|
M_DEVBUF, M_WAITOK);
|
|
if (!sc->sc_ifbuf) {
|
|
ppb_release_bus(ppbus, dev);
|
|
return ENOBUFS;
|
|
}
|
|
|
|
/* attach our interrupt handler, later detached when the bus is released */
|
|
if ((error = BUS_SETUP_INTR(ppbus, dev, sc->res_irq,
|
|
INTR_TYPE_NET, lp_intr, dev, &ih))) {
|
|
ppb_release_bus(ppbus, dev);
|
|
return (error);
|
|
}
|
|
|
|
ppb_wctr(ppbus, IRQENABLE);
|
|
ifp->if_flags |= IFF_RUNNING;
|
|
}
|
|
break;
|
|
|
|
case SIOCSIFMTU:
|
|
ptr = sc->sc_ifbuf;
|
|
sc->sc_ifbuf = malloc(ifr->ifr_mtu+MLPIPHDRLEN, M_DEVBUF, M_NOWAIT);
|
|
if (!sc->sc_ifbuf) {
|
|
sc->sc_ifbuf = ptr;
|
|
return ENOBUFS;
|
|
}
|
|
if (ptr)
|
|
free(ptr,M_DEVBUF);
|
|
sc->sc_if.if_mtu = ifr->ifr_mtu;
|
|
break;
|
|
|
|
case SIOCGIFMTU:
|
|
ifr->ifr_mtu = sc->sc_if.if_mtu;
|
|
break;
|
|
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
if (ifr == 0) {
|
|
return EAFNOSUPPORT; /* XXX */
|
|
}
|
|
switch (ifr->ifr_addr.sa_family) {
|
|
|
|
case AF_INET:
|
|
break;
|
|
|
|
default:
|
|
return EAFNOSUPPORT;
|
|
}
|
|
break;
|
|
|
|
case SIOCGIFMEDIA:
|
|
/*
|
|
* No ifmedia support at this stage; maybe use it
|
|
* in future for eg. protocol selection.
|
|
*/
|
|
return EINVAL;
|
|
|
|
default:
|
|
lprintf("LP:ioctl(0x%lx)\n", cmd);
|
|
return EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static __inline int
|
|
clpoutbyte (u_char byte, int spin, device_t ppbus)
|
|
{
|
|
ppb_wdtr(ppbus, ctxmitl[byte]);
|
|
while (ppb_rstr(ppbus) & CLPIP_SHAKE)
|
|
if (--spin == 0) {
|
|
return 1;
|
|
}
|
|
ppb_wdtr(ppbus, ctxmith[byte]);
|
|
while (!(ppb_rstr(ppbus) & CLPIP_SHAKE))
|
|
if (--spin == 0) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static __inline int
|
|
clpinbyte (int spin, device_t ppbus)
|
|
{
|
|
u_char c, cl;
|
|
|
|
while((ppb_rstr(ppbus) & CLPIP_SHAKE))
|
|
if(!--spin) {
|
|
return -1;
|
|
}
|
|
cl = ppb_rstr(ppbus);
|
|
ppb_wdtr(ppbus, 0x10);
|
|
|
|
while(!(ppb_rstr(ppbus) & CLPIP_SHAKE))
|
|
if(!--spin) {
|
|
return -1;
|
|
}
|
|
c = ppb_rstr(ppbus);
|
|
ppb_wdtr(ppbus, 0x00);
|
|
|
|
return (ctrecvl[cl] | ctrecvh[c]);
|
|
}
|
|
|
|
static void
|
|
lptap(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
/*
|
|
* Send a packet through bpf. We need to prepend the address family
|
|
* as a four byte field. Cons up a dummy header to pacify bpf. This
|
|
* is safe because bpf will only read from the mbuf (i.e., it won't
|
|
* try to free it or keep a pointer to it).
|
|
*/
|
|
u_int32_t af = AF_INET;
|
|
struct mbuf m0;
|
|
|
|
m0.m_next = m;
|
|
m0.m_len = sizeof(u_int32_t);
|
|
m0.m_data = (char *)⁡
|
|
bpf_mtap(ifp, &m0);
|
|
}
|
|
|
|
static void
|
|
lp_intr (void *arg)
|
|
{
|
|
device_t dev = (device_t)arg;
|
|
device_t ppbus = device_get_parent(dev);
|
|
struct lp_data *sc = DEVTOSOFTC(dev);
|
|
int len, s, j;
|
|
u_char *bp;
|
|
u_char c, cl;
|
|
struct mbuf *top;
|
|
|
|
s = splhigh();
|
|
|
|
if (sc->sc_if.if_flags & IFF_LINK0) {
|
|
|
|
/* Ack. the request */
|
|
ppb_wdtr(ppbus, 0x01);
|
|
|
|
/* Get the packet length */
|
|
j = clpinbyte(LPMAXSPIN2, ppbus);
|
|
if (j == -1)
|
|
goto err;
|
|
len = j;
|
|
j = clpinbyte(LPMAXSPIN2, ppbus);
|
|
if (j == -1)
|
|
goto err;
|
|
len = len + (j << 8);
|
|
if (len > sc->sc_if.if_mtu + MLPIPHDRLEN)
|
|
goto err;
|
|
|
|
bp = sc->sc_ifbuf;
|
|
|
|
while (len--) {
|
|
j = clpinbyte(LPMAXSPIN2, ppbus);
|
|
if (j == -1) {
|
|
goto err;
|
|
}
|
|
*bp++ = j;
|
|
}
|
|
/* Get and ignore checksum */
|
|
j = clpinbyte(LPMAXSPIN2, ppbus);
|
|
if (j == -1) {
|
|
goto err;
|
|
}
|
|
|
|
len = bp - sc->sc_ifbuf;
|
|
if (len <= CLPIPHDRLEN)
|
|
goto err;
|
|
|
|
sc->sc_iferrs = 0;
|
|
|
|
len -= CLPIPHDRLEN;
|
|
sc->sc_if.if_ipackets++;
|
|
sc->sc_if.if_ibytes += len;
|
|
top = m_devget(sc->sc_ifbuf + CLPIPHDRLEN, len, 0, &sc->sc_if, 0);
|
|
if (top) {
|
|
if (sc->sc_if.if_bpf)
|
|
lptap(&sc->sc_if, top);
|
|
if (! IF_HANDOFF(&ipintrq, top, NULL)) {
|
|
lprintf("DROP");
|
|
} else {
|
|
schednetisr(NETISR_IP);
|
|
}
|
|
}
|
|
goto done;
|
|
}
|
|
while ((ppb_rstr(ppbus) & LPIP_SHAKE)) {
|
|
len = sc->sc_if.if_mtu + LPIPHDRLEN;
|
|
bp = sc->sc_ifbuf;
|
|
while (len--) {
|
|
|
|
cl = ppb_rstr(ppbus);
|
|
ppb_wdtr(ppbus, 8);
|
|
|
|
j = LPMAXSPIN2;
|
|
while((ppb_rstr(ppbus) & LPIP_SHAKE))
|
|
if(!--j) goto err;
|
|
|
|
c = ppb_rstr(ppbus);
|
|
ppb_wdtr(ppbus, 0);
|
|
|
|
*bp++= trecvh[cl] | trecvl[c];
|
|
|
|
j = LPMAXSPIN2;
|
|
while (!((cl=ppb_rstr(ppbus)) & LPIP_SHAKE)) {
|
|
if (cl != c &&
|
|
(((cl = ppb_rstr(ppbus)) ^ 0xb8) & 0xf8) ==
|
|
(c & 0xf8))
|
|
goto end;
|
|
if (!--j) goto err;
|
|
}
|
|
}
|
|
|
|
end:
|
|
len = bp - sc->sc_ifbuf;
|
|
if (len <= LPIPHDRLEN)
|
|
goto err;
|
|
|
|
sc->sc_iferrs = 0;
|
|
|
|
len -= LPIPHDRLEN;
|
|
sc->sc_if.if_ipackets++;
|
|
sc->sc_if.if_ibytes += len;
|
|
top = m_devget(sc->sc_ifbuf + LPIPHDRLEN, len, 0, &sc->sc_if, 0);
|
|
if (top) {
|
|
if (sc->sc_if.if_bpf)
|
|
lptap(&sc->sc_if, top);
|
|
if (! IF_HANDOFF(&ipintrq, top, NULL)) {
|
|
lprintf("DROP");
|
|
} else {
|
|
schednetisr(NETISR_IP);
|
|
}
|
|
}
|
|
}
|
|
goto done;
|
|
|
|
err:
|
|
ppb_wdtr(ppbus, 0);
|
|
lprintf("R");
|
|
sc->sc_if.if_ierrors++;
|
|
sc->sc_iferrs++;
|
|
|
|
/*
|
|
* We are not able to send receive anything for now,
|
|
* so stop wasting our time
|
|
*/
|
|
if (sc->sc_iferrs > LPMAXERRS) {
|
|
printf("lp%d: Too many errors, Going off-line.\n", device_get_unit(dev));
|
|
ppb_wctr(ppbus, 0x00);
|
|
sc->sc_if.if_flags &= ~IFF_RUNNING;
|
|
sc->sc_iferrs=0;
|
|
}
|
|
|
|
done:
|
|
splx(s);
|
|
return;
|
|
}
|
|
|
|
static __inline int
|
|
lpoutbyte (u_char byte, int spin, device_t ppbus)
|
|
{
|
|
ppb_wdtr(ppbus, txmith[byte]);
|
|
while (!(ppb_rstr(ppbus) & LPIP_SHAKE))
|
|
if (--spin == 0)
|
|
return 1;
|
|
ppb_wdtr(ppbus, txmitl[byte]);
|
|
while (ppb_rstr(ppbus) & LPIP_SHAKE)
|
|
if (--spin == 0)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
lpoutput (struct ifnet *ifp, struct mbuf *m,
|
|
struct sockaddr *dst, struct rtentry *rt)
|
|
{
|
|
device_t dev = UNITODEVICE(ifp->if_unit);
|
|
device_t ppbus = device_get_parent(dev);
|
|
int s, err;
|
|
struct mbuf *mm;
|
|
u_char *cp = "\0\0";
|
|
u_char chksum = 0;
|
|
int count = 0;
|
|
int i, len, spin;
|
|
|
|
/* We need a sensible value if we abort */
|
|
cp++;
|
|
ifp->if_flags |= IFF_RUNNING;
|
|
|
|
err = 1; /* assume we're aborting because of an error */
|
|
|
|
s = splhigh();
|
|
|
|
/* Suspend (on laptops) or receive-errors might have taken us offline */
|
|
ppb_wctr(ppbus, IRQENABLE);
|
|
|
|
if (ifp->if_flags & IFF_LINK0) {
|
|
|
|
if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) {
|
|
lprintf("&");
|
|
lp_intr(dev);
|
|
}
|
|
|
|
/* Alert other end to pending packet */
|
|
spin = LPMAXSPIN1;
|
|
ppb_wdtr(ppbus, 0x08);
|
|
while ((ppb_rstr(ppbus) & 0x08) == 0)
|
|
if (--spin == 0) {
|
|
goto nend;
|
|
}
|
|
|
|
/* Calculate length of packet, then send that */
|
|
|
|
count += 14; /* Ethernet header len */
|
|
|
|
mm = m;
|
|
for (mm = m; mm; mm = mm->m_next) {
|
|
count += mm->m_len;
|
|
}
|
|
if (clpoutbyte(count & 0xFF, LPMAXSPIN1, ppbus))
|
|
goto nend;
|
|
if (clpoutbyte((count >> 8) & 0xFF, LPMAXSPIN1, ppbus))
|
|
goto nend;
|
|
|
|
/* Send dummy ethernet header */
|
|
for (i = 0; i < 12; i++) {
|
|
if (clpoutbyte(i, LPMAXSPIN1, ppbus))
|
|
goto nend;
|
|
chksum += i;
|
|
}
|
|
|
|
if (clpoutbyte(0x08, LPMAXSPIN1, ppbus))
|
|
goto nend;
|
|
if (clpoutbyte(0x00, LPMAXSPIN1, ppbus))
|
|
goto nend;
|
|
chksum += 0x08 + 0x00; /* Add into checksum */
|
|
|
|
mm = m;
|
|
do {
|
|
cp = mtod(mm, u_char *);
|
|
len = mm->m_len;
|
|
while (len--) {
|
|
chksum += *cp;
|
|
if (clpoutbyte(*cp++, LPMAXSPIN2, ppbus))
|
|
goto nend;
|
|
}
|
|
} while ((mm = mm->m_next));
|
|
|
|
/* Send checksum */
|
|
if (clpoutbyte(chksum, LPMAXSPIN2, ppbus))
|
|
goto nend;
|
|
|
|
/* Go quiescent */
|
|
ppb_wdtr(ppbus, 0);
|
|
|
|
err = 0; /* No errors */
|
|
|
|
nend:
|
|
if (err) { /* if we didn't timeout... */
|
|
ifp->if_oerrors++;
|
|
lprintf("X");
|
|
} else {
|
|
ifp->if_opackets++;
|
|
ifp->if_obytes += m->m_pkthdr.len;
|
|
if (ifp->if_bpf)
|
|
lptap(ifp, m);
|
|
}
|
|
|
|
m_freem(m);
|
|
|
|
if (!(ppb_rstr(ppbus) & CLPIP_SHAKE)) {
|
|
lprintf("^");
|
|
lp_intr(dev);
|
|
}
|
|
(void) splx(s);
|
|
return 0;
|
|
}
|
|
|
|
if (ppb_rstr(ppbus) & LPIP_SHAKE) {
|
|
lprintf("&");
|
|
lp_intr(dev);
|
|
}
|
|
|
|
if (lpoutbyte(0x08, LPMAXSPIN1, ppbus))
|
|
goto end;
|
|
if (lpoutbyte(0x00, LPMAXSPIN2, ppbus))
|
|
goto end;
|
|
|
|
mm = m;
|
|
do {
|
|
cp = mtod(mm,u_char *);
|
|
len = mm->m_len;
|
|
while (len--)
|
|
if (lpoutbyte(*cp++, LPMAXSPIN2, ppbus))
|
|
goto end;
|
|
} while ((mm = mm->m_next));
|
|
|
|
err = 0; /* no errors were encountered */
|
|
|
|
end:
|
|
--cp;
|
|
ppb_wdtr(ppbus, txmitl[*cp] ^ 0x17);
|
|
|
|
if (err) { /* if we didn't timeout... */
|
|
ifp->if_oerrors++;
|
|
lprintf("X");
|
|
} else {
|
|
ifp->if_opackets++;
|
|
ifp->if_obytes += m->m_pkthdr.len;
|
|
if (ifp->if_bpf)
|
|
lptap(ifp, m);
|
|
}
|
|
|
|
m_freem(m);
|
|
|
|
if (ppb_rstr(ppbus) & LPIP_SHAKE) {
|
|
lprintf("^");
|
|
lp_intr(dev);
|
|
}
|
|
|
|
(void) splx(s);
|
|
return 0;
|
|
}
|
|
|
|
static device_method_t lp_methods[] = {
|
|
/* device interface */
|
|
DEVMETHOD(device_identify, lp_identify),
|
|
DEVMETHOD(device_probe, lp_probe),
|
|
DEVMETHOD(device_attach, lp_attach),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t lp_driver = {
|
|
"plip",
|
|
lp_methods,
|
|
sizeof(struct lp_data),
|
|
};
|
|
|
|
DRIVER_MODULE(plip, ppbus, lp_driver, lp_devclass, 0, 0);
|