projects / unix-history / blob
? search:
summary | tags | clone url | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
BSD 4_3_Reno release
[unix-history] / usr / src / sys / tahoeif / if_ace.c
/*
* Copyright (c) 1988 Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Computer Consoles Inc.
*
* Redistribution is only permitted until one year after the first shipment
* of 4.4BSD by the Regents. Otherwise, redistribution and use in source and
* binary forms are permitted provided that: (1) source distributions retain
* this entire copyright notice and comment, and (2) distributions including
* binaries display the following acknowledgement: This product includes
* software developed by the University of California, Berkeley and its
* contributors'' in the documentation or other materials provided with the
* distribution and in all advertising materials mentioning features or use
* of this software. Neither the name of the University nor the names of
* its contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* @(#)if_ace.c 7.7 (Berkeley) 6/28/90
*/
/*
* ACC VERSAbus Ethernet controller
*/
#include "ace.h"
#if NACE > 0
#include "param.h"
#include "systm.h"
#include "malloc.h"
#include "mbuf.h"
#include "buf.h"
#include "protosw.h"
#include "socket.h"
#include "vmmac.h"
#include "ioctl.h"
#include "errno.h"
#include "vmparam.h"
#include "syslog.h"
#include "../net/if.h"
#include "../net/netisr.h"
#include "../net/route.h"
#ifdef INET
#include "../netinet/in.h"
#include "../netinet/in_systm.h"
#include "../netinet/in_var.h"
#include "../netinet/ip.h"
#include "../netinet/ip_var.h"
#include "../netinet/if_ether.h"
#endif
#ifdef NS
#include "../netns/ns.h"
#include "../netns/ns_if.h"
#endif
#include "machine/cpu.h"
#include "machine/pte.h"
#include "../tahoe/mtpr.h"
#include "../tahoeif/if_acereg.h"
#include "../tahoevba/vbavar.h"
int aceprobe(), aceattach(), acerint(), acecint(), acestart();
struct vba_device *aceinfo[NACE];
long acestd[] = { 0 };
struct vba_driver acedriver =
{ aceprobe, 0, aceattach, 0, acestd, "ace", aceinfo, "v/eiu", 0 };
int aceinit(), aceoutput(), aceioctl(), acereset();
struct mbuf *aceget();
/*
* Ethernet software status per interface.
*
* Each interface is referenced by a network interface structure,
* is_if, which the routing code uses to locate the interface.
* This structure contains the output queue for the interface, its address, ...
*/
struct ace_softc {
struct arpcom is_ac; /* Ethernet common part */
#define is_if is_ac.ac_if /* network-visible interface */
#define is_addr is_ac.ac_enaddr /* hardware Ethernet address */
short is_flags;
#define ACEF_OACTIVE 0x1 /* output is active */
#define ACEF_RCVPENDING 0x2 /* start rcv in acecint */
short is_promiscuous; /* true is enabled */
short is_segboundry; /* first TX Seg in dpm */
short is_eictr; /* Rx segment tracking ctr */
short is_eoctr; /* Tx segment tracking ctr */
short is_txnext; /* Next available Tx segment */
short is_currnd; /* current random backoff */
struct ace_stats is_stats; /* holds board statistics */
short is_xcnt; /* count xmitted segments to be acked
by the controller */
long is_ivec; /* autoconfig interrupt vector base */
struct pte *is_map; /* pte map for dual ported memory */
caddr_t is_dpm; /* address of mapped memory */
} ace_softc[NACE];
extern struct ifnet loif;
aceprobe(reg, vi)
caddr_t reg;
struct vba_device *vi;
{
register br, cvec; /* must be r12, r11 */
struct acedevice *ap = (struct acedevice *)reg;
struct ace_softc *is = &ace_softc[vi->ui_unit];
#ifdef lint
br = 0; cvec = br; br = cvec;
acerint(0); acecint(0);
#endif
if (badaddr(reg, 2))
return (0);
movow(&ap->csr, CSR_RESET);
DELAY(10000);
#ifdef notdef
/*
* Select two spaces for the interrupts aligned to an
* eight vector boundary and fitting in 8 bits (as
* required by the controller) -- YECH. The controller
* will be notified later at initialization time.
*/
if ((vi->ui_hd->vh_lastiv -= 2) > 0xff)
vi->ui_hd->vh_lastiv = 0x200;
is->is_ivec = vi->ui_hd->vh_lastiv = vi->ui_hd->vh_lastiv &~ 0x7;
#else
is->is_ivec = 0x90+vi->ui_unit*8;
#endif
br = 0x14, cvec = is->is_ivec; /* XXX */
return (sizeof (*ap));
}
/*
* Interface exists: make available by filling in network interface
* record. System will initialize the interface when it is ready
* to accept packets.
*/
aceattach(ui)
struct vba_device *ui;
{
register short unit = ui->ui_unit;
register struct ace_softc *is = &ace_softc[unit];
register struct ifnet *ifp = &is->is_if;
register struct acedevice *addr = (struct acedevice *)ui->ui_addr;
register short *wp, i;
ifp->if_unit = unit;
ifp->if_name = "ace";
ifp->if_mtu = ETHERMTU;
/*
* Get station's addresses and set multicast hash table.
*/
for (wp = (short *)addr->station, i = 0; i < 6; i++)
is->is_addr[i] = ~*wp++;
printf("ace%d: hardware address %s\n", unit,
ether_sprintf(is->is_addr));
is->is_promiscuous = 0;
for (wp = (short *)addr->hash, i = 0; i < 8; i++)
movow(wp++, ~0xf);
movow(&addr->bcastena[0], ~0xffff);
movow(&addr->bcastena[1], ~0xffff);
/*
* Allocate and map dual ported VERSAbus memory.
*/
if (vbmemalloc(32, (caddr_t)ui->ui_flags,
&is->is_map, &is->is_dpm) == 0) {
printf("ace%d: can't allocate VERSAbus memory map\n", unit);
return;
}
ifp->if_init = aceinit;
ifp->if_output = ether_output;
ifp->if_start = acestart;
ifp->if_ioctl = aceioctl;
ifp->if_reset = acereset;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
if_attach(ifp);
}
/*
* Reset of interface after "system" reset.
*/
acereset(unit, vban)
int unit, vban;
{
register struct vba_device *ui;
if (unit >= NACE || (ui = aceinfo[unit]) == 0 || ui->ui_alive == 0 ||
ui->ui_vbanum != vban)
return;
printf(" ace%d", unit);
aceinit(unit);
}
/*
* Initialization of interface; clear recorded pending operations
*/
aceinit(unit)
int unit;
{
register struct ace_softc *is = &ace_softc[unit];
register struct vba_device *ui = aceinfo[unit];
register struct acedevice *addr;
register short Csr;
register int s;
if (is->is_if.if_addrlist == (struct ifaddr *)0)
return;
if ((is->is_if.if_flags & IFF_RUNNING) == 0) {
/*
* Reset the controller, initialize the recieve buffers,
* and turn the controller on again and set board online.
*/
addr = (struct acedevice *)ui->ui_addr;
s = splimp();
movow(&addr->csr, CSR_RESET);
DELAY(10000);
/*
* Clean up dpm since the controller might
* jumble dpm after reset.
*/
acesetup(unit);
movow(&addr->csr, CSR_GO);
Csr = addr->csr;
if (Csr & CSR_ACTIVE) {
movow(&addr->ivct, is->is_ivec);
Csr |= CSR_IENA | is->is_promiscuous;
movow(&addr->csr, Csr);
is->is_flags = 0;
is->is_xcnt = 0;
is->is_if.if_flags |= IFF_RUNNING;
}
splx(s);
}
if (is->is_if.if_snd.ifq_head)
acestart(&is->is_if);
}
/*
* Start output on interface.
* Get another datagram to send off of the interface queue,
* and map it to the interface before starting the output.
*/
acestart(ifp)
register struct ifnet *ifp;
{
register struct tx_segment *txs;
register long len;
register int s;
struct mbuf *m;
short retries;
#define is ((struct ace_softc *)ifp)
again:
txs = (struct tx_segment*)(is->is_dpm + (is->is_txnext << 11));
if (txs->tx_csr & TCS_TBFULL) {
is->is_stats.tx_busy++;
ifp->if_flags |= IFF_OACTIVE;
return (0);
}
s = splimp();
IF_DEQUEUE(&ifp->if_snd, m);
splx(s);
if (m == 0) {
ifp->if_flags &= ~IFF_OACTIVE;
return (0);
}
len = aceput(txs->tx_data, m);
retries = txs->tx_csr & TCS_RTC;
if (retries > 0)
acebakoff(is, txs, retries);
/*
* Ensure minimum packet length.
* This makes the safe assumtion that there are no virtual holes
* after the data.
* For security, it might be wise to zero out the added bytes,
* but we're mainly interested in speed at the moment.
*/
if (len - sizeof (struct ether_header) < ETHERMIN)
len = ETHERMIN + sizeof (struct ether_header);
if (++is->is_txnext > SEG_MAX)
is->is_txnext = is->is_segboundry;
ifp->if_opackets++;
is->is_xcnt++;
len = (len & 0x7fff) | TCS_TBFULL;
movow(txs, len);
goto again;
#undef is
}
/*
* Transmit done interrupt.
*/
acecint(unit)
int unit;
{
register struct ace_softc *is = &ace_softc[unit];
register struct tx_segment *txseg;
short eostat;
if (is->is_xcnt <= 0) {
log(LOG_ERR, "ace%d: stray xmit interrupt, xcnt %d\n",
unit, is->is_xcnt);
is->is_xcnt = 0;
if (is->is_if.if_snd.ifq_head)
acestart(&is->is_if);
return;
}
is->is_xcnt--;
txseg = (struct tx_segment *)((is->is_eoctr << 11) + is->is_dpm);
eostat = txseg->tx_csr;
if ((eostat & TCS_TBFULL) == 0) {
is->is_stats.tx_retries += eostat & TCS_RTC;
if (eostat & TCS_RTFAIL) {
is->is_stats.tx_discarded++;
is->is_if.if_oerrors++;
} else
is->is_stats.tx_datagrams++;
if (++is->is_eoctr >= 16)
is->is_eoctr = is->is_segboundry;
}
if (is->is_if.if_snd.ifq_head)
acestart(&is->is_if);
}
/*
* Ethernet 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.
*/
acerint(unit)
int unit;
{
register struct ace_softc *is = &ace_softc[unit];
register struct ifqueue *inq;
register struct ether_header *ace;
register struct rx_segment *rxseg;
int len, s, off, resid;
struct mbuf *m;
short eistat;
if ((is->is_if.if_flags&IFF_RUNNING) == 0)
return;
again:
rxseg = (struct rx_segment *)((is->is_eictr << 11) + is->is_dpm);
eistat = rxseg->rx_csr;
if ((eistat & RCS_RBFULL) == 0)
return;
is->is_if.if_ipackets++;
if (++is->is_eictr >= is->is_segboundry)
is->is_eictr = 0;
len = eistat & RCS_RBC;
if ((eistat & (RCS_ROVRN | RCS_RCRC | RCS_RODD)) ||
len < ET_MINLEN || len > ET_MAXLEN+CRC_SIZE) {
if (eistat & RCS_ROVRN)
is->is_stats.rx_overruns++;
if (eistat & RCS_RCRC)
is->is_stats.rx_crc_errors++;
if (eistat & RCS_RODD)
is->is_stats.rx_align_errors++;
if (len < ET_MINLEN)
is->is_stats.rx_underruns++;
if (len > ET_MAXLEN+CRC_SIZE)
is->is_stats.rx_overruns++;
is->is_if.if_ierrors++;
rxseg->rx_csr = 0;
return;
} else
is->is_stats.rx_datagrams++;
ace = (struct ether_header *)rxseg->rx_data;
len -= sizeof (struct ether_header);
/*
* Deal with trailer protocol: if type is trailer
* get true type from first 16-bit word past data.
* Remember that type was trailer by setting off.
*/
ace->ether_type = ntohs((u_short)ace->ether_type);
#define acedataaddr(ace, off, type) \
((type)(((caddr_t)(((char *)ace)+sizeof (struct ether_header))+(off))))
if (ace->ether_type >= ETHERTYPE_TRAIL &&
ace->ether_type < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) {
off = (ace->ether_type - ETHERTYPE_TRAIL) * 512;
if (off >= ETHERMTU)
goto setup; /* sanity */
ace->ether_type = ntohs(*acedataaddr(ace, off, u_short *));
resid = ntohs(*(acedataaddr(ace, off+2, u_short *)));
if (off + resid > len)
goto setup; /* sanity */
len = off + resid;
} else
off = 0;
if (len == 0)
goto setup;
/*
* Pull packet off interface. Off is nonzero if packet
* has trailing header; aceget will then force this header
* information to be at the front.
*/
m = aceget((u_char *)rxseg->rx_data, len, off, &is->is_if);
if (m)
ether_input(&is->is_if, ace, m);
setup:
rxseg->rx_csr = 0;
goto again;
}
/*
* Routine to copy from mbuf chain to transmit buffer on the VERSAbus
* If packet size is less than the minimum legal size,
* the buffer is expanded. We probably should zero out the extra
* bytes for security, but that would slow things down.
*/
aceput(txbuf, m)
char *txbuf;
struct mbuf *m;
#ifdef notdef
{
register u_char *bp, *mcp;
register short *s1, *s2;
register u_int len;
register struct mbuf *mp;
int total;
total = mp->m_pkthdr.len;
bp = (u_char *)txbuf;
for (mp = m; mp; mp = mp->m_next) {
len = mp->m_len;
if (len == 0)
continue;
mcp = mtod(mp, u_char *);
if (((int)mcp & 01) && ((int)bp & 01)) {
/* source & destination at odd addresses */
movob(bp++, *mcp++);
--len;
}
if (len > 1 && (((int)mcp & 01)==0) && (((int)bp & 01)==0)) {
int l = len & 1;
s1 = (short *)bp;
s2 = (short *)mcp;
len >>= 1; /* count # of shorts */
while (len-- != 0)
movow(s1++, *s2++);
len = l; /* # remaining bytes */
bp = (u_char *)s1;
mcp = (u_char *)s2;
}
while (len-- != 0)
movob(bp++, *mcp++);
}
m_freem(m);
return (total);
}
#else
{
register u_char *bp, *mcp;
register short *s1, *s2;
register u_int len;
register struct mbuf *mp;
int total;
total = 0;
bp = (u_char *)txbuf;
for (mp = m; (mp); mp = mp->m_next) {
len = mp->m_len;
if (len == 0)
continue;
total += len;
mcp = mtod(mp, u_char *);
if (((int)mcp & 01) && ((int)bp & 01)) {
/* source & destination at odd addresses */
movob(bp++, *mcp++);
--len;
}
if (len > 1 && (((int)mcp & 01)==0) && (((int)bp & 01)==0)) {
register u_int l;
s1 = (short *)bp;
s2 = (short *)mcp;
l = len >> 1; /* count # of shorts */
while (l-- != 0)
movow(s1++, *s2++);
len &= 1; /* # remaining bytes */
bp = (u_char *)s1;
mcp = (u_char *)s2;
}
while (len-- != 0)
movob(bp++, *mcp++);
}
m_freem(m);
return (total);
}
#endif
/*
* Routine to copy from VERSAbus memory into mbufs.
*
* Warning: This makes the fairly safe assumption that
* mbufs have even lengths.
*/
struct mbuf *
aceget(rxbuf, totlen, off, ifp)
u_char *rxbuf;
int totlen, off;
struct ifnet *ifp;
{
register u_char *cp, *mcp;
register struct mbuf *m;
register int tlen;
struct mbuf *top = 0, **mp = &top;
int len;
u_char *packet_end;
rxbuf += sizeof (struct ether_header);
cp = rxbuf;
packet_end = cp + totlen;
if (off) {
off += 2 * sizeof(u_short);
totlen -= 2 * sizeof(u_short);
cp = rxbuf + off;
}
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == 0)
return (0);
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = totlen;
m->m_len = MHLEN;
while (totlen > 0) {
if (top) {
MGET(m, M_DONTWAIT, MT_DATA);
if (m == 0) {
m_freem(top);
return (0);
}
m->m_len = MLEN;
}
len = min(totlen, (packet_end - cp));
if (len >= MINCLSIZE) {
MCLGET(m, M_DONTWAIT);
if (m->m_flags & M_EXT)
m->m_len = len = min(len, MCLBYTES);
else
len = m->m_len;
} else {
/*
* Place initial small packet/header at end of mbuf.
*/
if (len < m->m_len) {
if (top == 0 && len + max_linkhdr <= m->m_len)
m->m_data += max_linkhdr;
m->m_len = len;
} else
len = m->m_len;
}
mcp = mtod(m, u_char *);
/*bcopy((caddr_t)cp, (caddr_t)mcp, len);*/
/*cp += len; mcp += len;*/
tlen = len;
if (((int)mcp & 01) && ((int)cp & 01)) {
/* source & destination at odd addresses */
*mcp++ = *cp++;
--tlen;
}
if (tlen > 1 && (((int)mcp&01) == 0) && (((int)cp&01) == 0)) {
register short *s1, *s2;
register int l;
s1 = (short *)mcp;
s2 = (short *)cp;
l = tlen >> 1; /* count # of shorts */
while (l-- > 0) /* copy shorts */
*s1++ = *s2++;
tlen &= 1; /* # remaining bytes */
mcp = (u_char *)s1;
cp = (u_char *)s2;
}
while (tlen-- > 0)
*mcp++ = *cp++;
*mp = m;
mp = &m->m_next;
totlen -= len;
if (cp == packet_end)
cp = rxbuf;
}
return (top);
}
/* backoff table masks */
short random_mask_tbl[16] = {
0x0040, 0x00c0, 0x01c0, 0x03c0, 0x07c0, 0x0fc0, 0x1fc0, 0x3fc0,
0x7fc0, 0xffc0, 0xffc0, 0xffc0, 0xffc0, 0xffc0, 0xffc0, 0xffc0
};
acebakoff(is, txseg, retries)
struct ace_softc *is;
struct tx_segment *txseg;
register int retries;
{
register short *pBakNum, random_num;
short *pMask;
pMask = &random_mask_tbl[0];
pBakNum = &txseg->tx_backoff[0];
while (--retries >= 0) {
random_num = (is->is_currnd = (is->is_currnd * 18741)-13849);
random_num &= *pMask++;
*pBakNum++ = random_num ^ (short)(0xff00 | 0x00fc);
}
}
/*
* Process an ioctl request.
*/
aceioctl(ifp, cmd, data)
register struct ifnet *ifp;
int cmd;
caddr_t data;
{
register struct ifaddr *ifa = (struct ifaddr *)data;
struct acedevice *addr;
int s = splimp(), error = 0;
switch (cmd) {
case SIOCSIFADDR:
ifp->if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
aceinit(ifp->if_unit); /* before arpwhohas */
((struct arpcom *)ifp)->ac_ipaddr =
IA_SIN(ifa)->sin_addr;
arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr);
break;
#endif
#ifdef NS
case AF_NS: {
struct ns_addr *ina = &IA_SNS(ifa)->sns_addr;
struct ace_softc *is = &ace_softc[ifp->if_unit];
if (!ns_nullhost(*ina)) {
ifp->if_flags &= ~IFF_RUNNING;
addr = (struct acedevice *)
aceinfo[ifp->if_unit]->ui_addr;
movow(&addr->csr, CSR_RESET);
DELAY(10000);
/* set station address & copy addr to arp */
acesetaddr(ifp->if_unit, addr,
ina->x_host.c_host);
} else
ina->x_host = *(union ns_host *)is->is_addr;
aceinit(ifp->if_unit);
break;
}
#endif
default:
aceinit(ifp->if_unit);
break;
}
break;
case SIOCSIFFLAGS:
if ((ifp->if_flags&IFF_UP) == 0 && ifp->if_flags&IFF_RUNNING) {
addr = (struct acedevice *)
(aceinfo[ifp->if_unit]->ui_addr);
movow(&addr->csr, CSR_RESET);
ifp->if_flags &= ~IFF_RUNNING;
} else if (ifp->if_flags&IFF_UP &&
(ifp->if_flags&IFF_RUNNING) == 0)
aceinit(ifp->if_unit);
break;
default:
error = EINVAL;
}
splx(s);
return (error);
}
/*
* Set the on-board station address, then read it back
* to initialize the address used by ARP (among others).
*/
acesetaddr(unit, addr, station)
short unit;
struct acedevice *addr;
u_char *station;
{
struct ace_softc *is = &ace_softc[unit];
register short *wp, i;
for (wp = (short *)addr->station, i = 0; i < 6; i++)
movow(wp++, ~*station++);
for (wp = (short *)addr->station, i = 0; i < 6; i++)
is->is_addr[i] = ~*wp++;
printf("ace%d: hardware address %s\n", unit,
ether_sprintf(is->is_addr));
}
/*
* Setup the device for use. Initialize dual-ported memory,
* backoff parameters, and various other software state.
*/
acesetup(unit)
int unit;
{
register struct ace_softc *is = &ace_softc[unit];
register char *pData1;
register short i;
struct acedevice *addr;
bzero(is->is_dpm, 16384*2);
is->is_currnd = 49123;
addr = (struct acedevice *)aceinfo[unit]->ui_addr;
is->is_segboundry = (addr->segb >> 11) & 0xf;
pData1 = is->is_dpm + (is->is_segboundry << 11);
for (i = SEG_MAX + 1 - is->is_segboundry; --i >= 0;) {
acebakoff(is, (struct tx_segment *)pData1, 15);
pData1 += sizeof (struct tx_segment);
}
is->is_eictr = 0;
is->is_eoctr = is->is_txnext = is->is_segboundry;
bzero((char *)&is->is_stats, sizeof (is->is_stats));
}
#endif
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.