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date and time created 82/06/04 10:57:08 by sam
[unix-history] / usr / src / sys / vax / if / if_vv.c
/* if_vv.c 4.1 82/06/04 */
/*
* Proteon 10 Meg Ring Driver.
* This device is called "vv" because its "real name",
* V2LNI won't work if shortened to the obvious "v2".
* Hence the subterfuge.
*/
#include "../h/param.h"
#include "../h/systm.h"
#include "../h/mbuf.h"
#include "../h/pte.h"
#include "../h/buf.h"
#include "../h/protosw.h"
#include "../h/socket.h"
#include "../h/ubareg.h"
#include "../h/ubavar.h"
#include "../h/cpu.h"
#include "../h/mtpr.h"
#include "../h/vmmac.h"
#include "../net/in.h"
#include "../net/in_systm.h"
#include "../net/if.h"
#include "../net/if_vv.h"
#include "../net/if_uba.h"
#include "../net/ip.h"
#include "../net/ip_var.h"
#include "../net/route.h"
#include "vv.h"
#include "imp.h"
/*
* N.B. - if WIRECENTER is defined wrong, it can well break
* the hardware!!
*/
#undef AUTOIDENTIFY
#define WIRECENTER
#ifdef WIRECENTER
#define VV_CONF VV_HEN /* drive wire center relay */
#else
#define VV_CONF VV_STE /* allow operation without wire center */
#endif
#define VVMTU (1024+512)
int vvprobe(), vvattach(), vvrint(), vvxint();
struct uba_device *vvinfo[NVV];
u_short vvstd[] = { 0 };
struct uba_driver vvdriver =
{ vvprobe, 0, vvattach, 0, vvstd, "vv", vvinfo };
#define VVUNIT(x) minor(x)
int vvinit(),vvoutput(),vvreset();
/*
* Software status of each interface.
*
* Each interface is referenced by a network interface structure,
* vs_if, which the routing code uses to locate the interface.
* This structure contains the output queue for the interface, its address, ...
* We also have, for each interface, a UBA interface structure, which
* contains information about the UNIBUS resources held by the interface:
* map registers, buffered data paths, etc. Information is cached in this
* structure for use by the if_uba.c routines in running the interface
* efficiently.
*/
struct vv_softc {
struct ifnet vs_if; /* network-visible interface */
struct ifuba vs_ifuba; /* UNIBUS resources */
short vs_oactive; /* is output active? */
short vs_olen; /* length of last output */
u_short vs_lastx; /* last destination address */
short vs_tries; /* current retry count */
short vs_init; /* number of ring inits */
short vs_flush; /* number of flushed packets */
short vs_nottaken; /* number of packets refused */
} vv_softc[NVV];
vvprobe(reg)
caddr_t reg;
{
register int br, cvec;
register struct vvreg *addr = (struct vvreg *)reg;
#ifdef lint
br = 0; cvec = br; br = cvec;
#endif
/* reset interface, enable, and wait till dust settles */
addr->vvicsr = VV_RST;
addr->vvocsr = VV_RST;
DELAY(100000);
/* generate interrupt by doing 1 word DMA from 0 in uba space!! */
addr->vvocsr = VV_IEN; /* enable interrupt */
addr->vvoba = 0; /* low 16 bits */
addr->vvoea = 0; /* extended bits */
addr->vvowc = -1; /* for 1 word */
addr->vvocsr |= VV_DEN; /* start the DMA */
DELAY(100000);
addr->vvocsr = 0;
if (cvec && cvec != 0x200)
cvec -= 4; /* backup so vector => recieve */
return(1);
}
/*
* Interface exists: make available by filling in network interface
* record. System will initialize the interface when it is ready
* to accept packets.
*/
vvattach(ui)
struct uba_device *ui;
{
register struct vv_softc *vs = &vv_softc[ui->ui_unit];
register struct sockaddr_in *sin;
COUNT(VVATTACH);
vs->vs_if.if_unit = ui->ui_unit;
vs->vs_if.if_name = "vv";
vs->vs_if.if_mtu = VVMTU;
vs->vs_if.if_net = ui->ui_flags;
vs->vs_if.if_host[0] = 0; /* this will be reset in vvinit() */
sin = (struct sockaddr_in *)&vs->vs_if.if_addr;
sin->sin_family = AF_INET;
sin->sin_addr = if_makeaddr(vs->vs_if.if_net, vs->vs_if.if_host[0]);
sin = (struct sockaddr_in *)&vs->vs_if.if_broadaddr;
sin->sin_family = AF_INET;
sin->sin_addr = if_makeaddr(vs->vs_if.if_net, VV_BROADCAST);
vs->vs_if.if_flags = IFF_BROADCAST;
vs->vs_if.if_init = vvinit;
vs->vs_if.if_output = vvoutput;
vs->vs_if.if_ubareset = vvreset;
vs->vs_ifuba.ifu_flags = UBA_NEEDBDP | UBA_NEED16;
if_attach(&vs->vs_if);
#if NIMP == 0
if (ui->ui_flags & ~0xff)
vvlhinit((ui->ui_flags &~ 0xff) | 0x0a);
#endif
}
/*
* Reset of interface after UNIBUS reset.
* If interface is on specified uba, reset its state.
*/
vvreset(unit, uban)
int unit, uban;
{
register struct uba_device *ui;
COUNT(VVRESET);
if (unit >= NVV || (ui = vvinfo[unit]) == 0 || ui->ui_alive == 0 ||
ui->ui_ubanum != uban)
return;
printf(" vv%d", unit);
vvinit(unit);
}
/*
* Initialization of interface; clear recorded pending
* operations, and reinitialize UNIBUS usage.
*/
vvinit(unit)
int unit;
{
register struct vv_softc *vs = &vv_softc[unit];
register struct uba_device *ui = vvinfo[unit];
register struct vvreg *addr;
struct sockaddr_in *sin;
struct mbuf *m;
struct vv_header *v;
int ubainfo, retrying, attempts, waitcount, s;
if (if_ubainit(&vs->vs_ifuba, ui->ui_ubanum,
sizeof (struct vv_header), (int)btoc(VVMTU)) == 0) {
printf("vv%d: can't initialize\n", unit);
return;
}
addr = (struct vvreg *)ui->ui_addr;
#ifdef AUTOIDENTIFY
/*
* Build a multicast message to identify our address
*/
attempts = 0; /* total attempts, including bad msg type */
top:
retrying = 0; /* first time through */
m = m_get(M_DONTWAIT);
if (m == 0)
panic("vvinit: can't get mbuf");
m->m_next = 0;
m->m_off = MMINOFF;
m->m_len = sizeof(struct vv_header);
v = mtod(m, struct vv_header *);
v->vh_dhost = 0; /* multicast destination address */
v->vh_shost = 0; /* will be overwritten with ours */
v->vh_version = RING_VERSION;
v->vh_type = RING_WHOAMI;
v->vh_info = 0;
/*
* Reset interface, establish Digital Loopback Mode, and
* send the multicast (to myself) with Input Copy enabled.
*/
retry:
ubainfo = vs->vs_ifuba.ifu_r.ifrw_info;
addr->vvicsr = VV_RST;
addr->vviba = (u_short) ubainfo;
addr->vviea = (u_short) (ubainfo >> 16);
addr->vviwc = -(sizeof (struct vv_header) + VVMTU) >> 1;
addr->vvicsr = VV_STE | VV_DEN | VV_ENB | VV_LPB;
/* map xmit message into uba if not already there */
if (!retrying)
vs->vs_olen = if_wubaput(&vs->vs_ifuba, m);
if (vs->vs_ifuba.ifu_flags & UBA_NEEDBDP)
UBAPURGE(vs->vs_ifuba.ifu_uba, vs->vs_ifuba.ifu_w.ifrw_bdp);
addr->vvocsr = VV_RST | VV_CPB; /* clear packet buffer */
ubainfo = vs->vs_ifuba.ifu_w.ifrw_info;
addr->vvoba = (u_short) ubainfo;
addr->vvoea = (u_short) (ubainfo >> 16);
addr->vvowc = -((vs->vs_olen + 1) >> 1);
addr->vvocsr = VV_CPB | VV_DEN | VV_INR | VV_ENB;
/*
* Wait for receive side to finish.
* Extract source address (which will our own),
* and post to interface structure.
*/
DELAY(1000);
for (waitcount = 0; ((addr->vvicsr) & VV_RDY) == 0; waitcount++) {
if (waitcount < 10)
DELAY(1000);
else {
if (attempts++ < 10)s
goto retry;
else {
printf("vv%d: can't initialize\n", unit);
printf("vvinit loopwait: icsr = %b\n",
0xffff&(addr->vvicsr),VV_IBITS);
return;
}
}
}
if (vs->vs_ifuba.ifu_flags & UBA_NEEDBDP)
UBAPURGE(vs->vs_ifuba.ifu_uba, vs->vs_ifuba.ifu_w.ifrw_bdp);
if (vs->vs_ifuba.ifu_xtofree)
m_freem(vs->vs_ifuba.ifu_xtofree);
if (vs->vs_ifuba.ifu_flags & UBA_NEEDBDP)
UBAPURGE(vs->vs_ifuba.ifu_uba, vs->vs_ifuba.ifu_r.ifrw_bdp);
m = if_rubaget(&vs->vs_ifuba, sizeof(struct vv_header), 0);
if (m)
m_freem(m);
/*
* check message type before we believe the source host address
*/
v = (struct vv_header *)(vs->vs_ifuba.ifu_r.ifrw_addr);
if (v->vh_type == RING_WHOAMI)
vs->vs_if.if_host[0] = v->vh_shost;
else
goto top;
#else
vs->vs_if.if_host[0] = 24;
#endif
printf("vv%d: host %d\n", unit, vs->vs_if.if_host[0]);
sin = (struct sockaddr_in *)&vs->vs_if.if_addr;
sin->sin_family = AF_INET;
sin->sin_addr =
if_makeaddr(vs->vs_if.if_net, vs->vs_if.if_host[0]);
/*
* Reset the interface, and join the ring
*/
addr->vvocsr = VV_RST | VV_CPB; /* clear packet buffer */
addr->vvicsr = VV_RST | VV_CONF; /* close logical relay */
sleep((caddr_t)&lbolt, PZERO); /* let contacts settle */
vs->vs_init = 0;
vs->vs_flush = 0;
vs->vs_nottaken = 0;
/*
* Hang a receive and start any
* pending writes by faking a transmit complete.
*/
s = splimp();
ubainfo = vs->vs_ifuba.ifu_r.ifrw_info;
addr->vviba = (u_short) ubainfo;
addr->vviea = (u_short) (ubainfo >> 16);
addr->vviwc = -(sizeof (struct vv_header) + VVMTU) >> 1;
addr->vvicsr = VV_IEN | VV_CONF | VV_DEN | VV_ENB;
vs->vs_oactive = 1;
vvxint(unit);
splx(s);
if_rtinit(&vs->vs_if, RTF_DIRECT|RTF_UP);
}
/*
* Start or restart output on interface.
* If interface is not already active, get another datagram
* to send off of the interface queue, and map it to the interface
* before starting the output.
*/
vvstart(dev)
dev_t dev;
{
int unit = VVUNIT(dev);
struct uba_device *ui = vvinfo[unit];
register struct vv_softc *vs = &vv_softc[unit];
register struct vvreg *addr;
struct mbuf *m;
int ubainfo;
int dest;
COUNT(VVSTART);
if (vs->vs_oactive)
goto restart;
/*
* Not already active: dequeue another request
* and map it to the UNIBUS. If no more requests,
* just return.
*/
IF_DEQUEUE(&vs->vs_if.if_snd, m);
if (m == 0) {
vs->vs_oactive = 0;
return;
}
dest = mtod(m, struct vv_header *)->vh_dhost;
vs->vs_olen = if_wubaput(&vs->vs_ifuba, m);
vs->vs_lastx = dest;
restart:
/*
* Have request mapped to UNIBUS for transmission.
* Purge any stale data from this BDP, and start the otput.
*/
if (vs->vs_ifuba.ifu_flags & UBA_NEEDBDP)
UBAPURGE(vs->vs_ifuba.ifu_uba, vs->vs_ifuba.ifu_w.ifrw_bdp);
addr = (struct vvreg *)ui->ui_addr;
ubainfo = vs->vs_ifuba.ifu_w.ifrw_info;
addr->vvoba = (u_short) ubainfo;
addr->vvoea = (u_short) (ubainfo >> 16);
addr->vvowc = -((vs->vs_olen + 1) >> 1);
addr->vvocsr = VV_IEN | VV_CPB | VV_DEN | VV_INR | VV_ENB;
vs->vs_oactive = 1;
}
/*
* VVLNI transmit interrupt
* Start another output if more data to send.
*/
vvxint(unit)
int unit;
{
register struct uba_device *ui = vvinfo[unit];
register struct vv_softc *vs = &vv_softc[unit];
register struct vvreg *addr;
register int oc;
COUNT(ENXINT);
addr = (struct vvreg *)ui->ui_addr;
oc = 0xffff & (addr->vvocsr);
if (vs->vs_oactive == 0) {
printf("vv%d: stray interrupt vvocsr = %b\n", unit,
oc, VV_OBITS);
return;
}
if (oc & (VV_OPT | VV_RFS)) {
if (++(vs->vs_tries) < VVRETRY) {
if (oc & VV_OPT)
vs->vs_init++;
if (oc & VV_RFS)
vs->vs_nottaken++;
addr->vvocsr = VV_IEN | VV_ENB | VV_INR;
return;
}
if (oc & VV_OPT)
printf("vv%d: output timeout\n");
}
vs->vs_if.if_opackets++;
vs->vs_oactive = 0;
vs->vs_tries = 0;
if (oc & VVXERR) {
vs->vs_if.if_oerrors++;
printf("vv%d: error vvocsr = %b\n", unit, 0xffff & oc,
VV_OBITS);
}
if (vs->vs_ifuba.ifu_xtofree) {
m_freem(vs->vs_ifuba.ifu_xtofree);
vs->vs_ifuba.ifu_xtofree = 0;
}
if (vs->vs_if.if_snd.ifq_head == 0) {
vs->vs_lastx = 0;
return;
}
vvstart(unit);
}
/*
* V2lni interface receiver interrupt.
* If input error just drop packet.
* Otherwise purge input buffered data path and examine
* packet to determine type. If can't determine length
* from type, then have to drop packet. Othewise decapsulate
* packet based on type and pass to type specific higher-level
* input routine.
*/
vvrint(unit)
int unit;
{
register struct vv_softc *vs = &vv_softc[unit];
struct vvreg *addr = (struct vvreg *)vvinfo[unit]->ui_addr;
register struct vv_header *vv;
register struct ifqueue *inq;
struct mbuf *m;
int ubainfo, len, off;
COUNT(VVRINT);
vs->vs_if.if_ipackets++;
/*
* Purge BDP; drop if input error indicated.
*/
if (vs->vs_ifuba.ifu_flags & UBA_NEEDBDP)
UBAPURGE(vs->vs_ifuba.ifu_uba, vs->vs_ifuba.ifu_r.ifrw_bdp);
if (addr->vvicsr & VVRERR) {
vs->vs_if.if_ierrors++;
printf("vv%d: error vvicsr = %b\n", unit,
0xffff&(addr->vvicsr), VV_IBITS);
goto setup;
}
off = 0;
len = 0;
vv = (struct vv_header *)(vs->vs_ifuba.ifu_r.ifrw_addr);
/*
* Demultiplex on packet type and deal with oddities of
* trailer protocol format
*/
switch (vv->vh_type) {
#ifdef INET
case RING_IP:
len = htons((u_short)((struct ip *) vv)->ip_len);
schednetisr(NETISR_IP);
inq = &ipintrq;
break;
#endif
default:
printf("vv%d: unknown pkt type 0x%x\n", unit, vv->vh_type);
goto setup;
}
if (len == 0)
goto setup;
/*
* Pull packet off interface. Off is nonzero if packet
* has trailing header; if_rubaget will then force this header
* information to be at the front, but we still have to drop
* the two-byte type which is at the front of any trailer data.
*/
m = if_rubaget(&vs->vs_ifuba, len, off);
if (m == 0)
goto setup;
IF_ENQUEUE(inq, m);
setup:
/*
* Reset for next packet.
*/
ubainfo = vs->vs_ifuba.ifu_r.ifrw_info;
addr->vviba = (u_short) ubainfo;
addr->vviea = (u_short) (ubainfo >> 16);
addr->vviwc = -(sizeof (struct vv_header) + VVMTU) >> 1;
addr->vvicsr = VV_RST | VV_CONF;
addr->vvicsr |= VV_IEN | VV_DEN | VV_ENB;
}
/*
* V2lni output routine.
* Encapsulate a packet of type family for the local net.
* Use trailer local net encapsulation if enough data in first
* packet leaves a multiple of 512 bytes of data in remainder.
*/
vvoutput(ifp, m0, dst)
struct ifnet *ifp;
struct mbuf *m0;
struct sockaddr *dst;
{
register struct mbuf *m = m0;
register struct vv_header *vv;
int type, dest, s;
switch (dst->sa_family) {
#ifdef INET
case AF_INET: {
register struct ip *ip = mtod(m0, struct ip *);
int off;
dest = ip->ip_dst.s_addr >> 24;
type = RING_IP;
off = 0;
goto gottype;
}
#endif
default:
printf("vv%d: can't handle af%d\n", ifp->if_unit,
dst->sa_family);
m_freem(m0);
return (0);
}
gottrailertype:
/*
* Packet to be sent as trailer: move first packet
* (control information) to end of chain.
*/
while (m->m_next)
m = m->m_next;
m->m_next = m0;
m = m0->m_next;
m0->m_next = 0;
m0 = m;
gottype:
/*
* Add local net header. If no space in first mbuf,
* allocate another.
*/
if (m->m_off > MMAXOFF ||
MMINOFF + sizeof (struct vv_header) > m->m_off) {
m = m_get(M_DONTWAIT);
if (m == 0) {
m_freem(m0);
return (0);
}
m->m_next = m0;
m->m_off = MMINOFF;
m->m_len = sizeof (struct vv_header);
} else {
m->m_off -= sizeof (struct vv_header);
m->m_len += sizeof (struct vv_header);
}
vv = mtod(m, struct vv_header *);
vv->vh_shost = ifp->if_host[0];
vv->vh_dhost = dest;
vv->vh_version = RING_VERSION;
vv->vh_type = type;
vv->vh_info = m->m_len;
/*
* Queue message on interface, and start output if interface
* not yet active.
*/
s = splimp();
IF_ENQUEUE(&ifp->if_snd, m);
if (vv_softc[ifp->if_unit].vs_oactive == 0)
vvstart(ifp->if_unit);
splx(s);
return (1);
}
#ifdef notdef
/*
* vvprt_hdr(s, v) print the local net header in "v"
* with title is "s"
*/
vvprt_hdr(s, v)
char *s;
register struct vv_header *v;
{
printf("%s: dsvti: 0x%x 0x%x 0x%x 0x%x 0x%x\n",
s,
0xff & (int)(v->vh_dhost), 0xff & (int)(v->vh_shost),
0xff & (int)(v->vh_version), 0xff & (int)(v->vh_type),
0xffff & (int)(v->vh_info));
}
/*
* print "l" hex bytes starting at "s"
*/
vvprt_hex(s, l)
char *s;
int l;
{
register int i;
register int z;
for (i=0 ; i < l; i++) {
z = 0xff & (int)(*(s + i));
printf("%c%c ",
"0123456789abcdef"[(z >> 4) & 0x0f],
"0123456789abcdef"[z & 0x0f]
);
}
}
#endif
#if NIMP == 0 && NVV > 0
/*
* Logical host interface driver.
* Allows host to appear as an ARPAnet
* logical host. Must also have routing
* table entry set up to forward packets
* to appropriate geteway on localnet.
*/
struct ifnet vvlhif;
int looutput();
/*
* Called by localnet interface to allow logical
* host interface to "attach".
*/
vvlhinit(vvifp, addr)
struct ifnet *vvifp;
int addr;
{
register struct ifnet *ifp = &vvlhif;
register struct sockaddr_in *sin;
COUNT(VVLHINIT);
ifp->if_name = "lh";
ifp->if_mtu = VVMTU;
sin = (struct sockaddr_in *)&ifp->if_addr;
sin->sin_family = AF_INET;
sin->sin_addr.s_addr = addr;
ifp->if_net = netpart(sin->sin_addr);
ifp->if_flags = IFF_UP;
ifp->if_output = looutput;
if_attach(ifp);
rtinit(&ifp->if_addr, &ifp->if_addr, RTF_DIRECT|RTF_UP|RTF_HOST);
}
#endif
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.