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Annotation of 43BSDReno/sys/vaxif/if_ec.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution is only permitted until one year after the first shipment
        !             6:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !             7:  * binary forms are permitted provided that: (1) source distributions retain
        !             8:  * this entire copyright notice and comment, and (2) distributions including
        !             9:  * binaries display the following acknowledgement:  This product includes
        !            10:  * software developed by the University of California, Berkeley and its
        !            11:  * contributors'' in the documentation or other materials provided with the
        !            12:  * distribution and in all advertising materials mentioning features or use
        !            13:  * of this software.  Neither the name of the University nor the names of
        !            14:  * its contributors may be used to endorse or promote products derived from
        !            15:  * this software without specific prior written permission.
        !            16:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            19:  *
        !            20:  *     @(#)if_ec.c     7.7 (Berkeley) 6/28/90
        !            21:  */
        !            22: 
        !            23: #include "ec.h"
        !            24: #if NEC > 0
        !            25: 
        !            26: /*
        !            27:  * 3Com Ethernet Controller interface
        !            28:  */
        !            29: #include "machine/pte.h"
        !            30: 
        !            31: #include "param.h"
        !            32: #include "systm.h"
        !            33: #include "mbuf.h"
        !            34: #include "buf.h"
        !            35: #include "protosw.h"
        !            36: #include "socket.h"
        !            37: #include "syslog.h"
        !            38: #include "vmmac.h"
        !            39: #include "ioctl.h"
        !            40: #include "errno.h"
        !            41: 
        !            42: #include "../net/if.h"
        !            43: #include "../net/netisr.h"
        !            44: #include "../net/route.h"
        !            45: 
        !            46: #ifdef INET
        !            47: #include "../netinet/in.h"
        !            48: #include "../netinet/in_systm.h"
        !            49: #include "../netinet/in_var.h"
        !            50: #include "../netinet/ip.h"
        !            51: #include "../netinet/if_ether.h"
        !            52: #endif
        !            53: 
        !            54: #ifdef NS
        !            55: #include "../netns/ns.h"
        !            56: #include "../netns/ns_if.h"
        !            57: #endif
        !            58: 
        !            59: #include "../vax/cpu.h"
        !            60: #include "../vax/mtpr.h"
        !            61: #include "if_ecreg.h"
        !            62: #include "if_uba.h"
        !            63: #include "../vaxuba/ubareg.h"
        !            64: #include "../vaxuba/ubavar.h"
        !            65: 
        !            66: #if CLSIZE == 2
        !            67: #define ECBUFSIZE      32              /* on-board memory, clusters */
        !            68: #endif
        !            69: 
        !            70: int    ecubamem(), ecprobe(), ecattach(), ecrint(), ecxint(), eccollide();
        !            71: struct uba_device *ecinfo[NEC];
        !            72: u_short ecstd[] = { 0 };
        !            73: struct uba_driver ecdriver =
        !            74:        { ecprobe, 0, ecattach, 0, ecstd, "ec", ecinfo, 0, 0, 0, 0, ecubamem };
        !            75: 
        !            76: int    ecinit(),ecioctl(),ecstart(),ecreset(),ether_output();
        !            77: struct mbuf *ecget();
        !            78: 
        !            79: extern struct ifnet loif;
        !            80: 
        !            81: /*
        !            82:  * Ethernet software status per interface.
        !            83:  *
        !            84:  * Each interface is referenced by a network interface structure,
        !            85:  * es_if, which the routing code uses to locate the interface.
        !            86:  * This structure contains the output queue for the interface, its address, ...
        !            87:  * We also have, for each interface, a UBA interface structure, which
        !            88:  * contains information about the UNIBUS resources held by the interface:
        !            89:  * map registers, buffered data paths, etc.  Information is cached in this
        !            90:  * structure for use by the if_uba.c routines in running the interface
        !            91:  * efficiently.
        !            92:  */
        !            93: struct ec_softc {
        !            94:        struct  arpcom es_ac;           /* common Ethernet structures */
        !            95: #define        es_if   es_ac.ac_if             /* network-visible interface */
        !            96: #define        es_addr es_ac.ac_enaddr         /* hardware Ethernet address */
        !            97:        struct  ifuba es_ifuba;         /* UNIBUS resources */
        !            98:        short   es_mask;                /* mask for current output delay */
        !            99:        u_char  *es_buf[16];            /* virtual addresses of buffers */
        !           100: } ec_softc[NEC];
        !           101: 
        !           102: /*
        !           103:  * Configure on-board memory for an interface.
        !           104:  * Called from autoconfig and after a uba reset.
        !           105:  * The address of the memory on the uba is supplied in the device flags.
        !           106:  */
        !           107: ecubamem(ui, uban)
        !           108:        register struct uba_device *ui;
        !           109: {
        !           110:        register caddr_t ecbuf = (caddr_t) &umem[uban][ui->ui_flags];
        !           111:        register struct ecdevice *addr = (struct ecdevice *)ui->ui_addr;
        !           112: 
        !           113:        /*
        !           114:         * Make sure csr is there (we run before ecprobe).
        !           115:         */
        !           116:        if (badaddr((caddr_t)addr, 2))
        !           117:                return (-1);
        !           118: #if VAX780
        !           119:        if (cpu == VAX_780 && uba_hd[uban].uh_uba->uba_sr) {
        !           120:                uba_hd[uban].uh_uba->uba_sr = uba_hd[uban].uh_uba->uba_sr;
        !           121:                return (-1);
        !           122:        }
        !           123: #endif
        !           124:        /*
        !           125:         * Make sure memory is turned on
        !           126:         */
        !           127:        addr->ec_rcr = EC_AROM;
        !           128:        /*
        !           129:         * Tell the system that the board has memory here, so it won't
        !           130:         * attempt to allocate the addresses later.
        !           131:         */
        !           132:        if (ubamem(uban, ui->ui_flags, ECBUFSIZE*CLSIZE, 1) == 0) {
        !           133:                printf("ec%d: cannot reserve uba addresses\n", ui->ui_unit);
        !           134:                addr->ec_rcr = EC_MDISAB;       /* disable memory */
        !           135:                return (-1);
        !           136:        }
        !           137:        /*
        !           138:         * Check for existence of buffers on Unibus.
        !           139:         */
        !           140:        if (badaddr((caddr_t)ecbuf, 2)) {
        !           141: bad:
        !           142:                printf("ec%d: buffer mem not found\n", ui->ui_unit);
        !           143:                (void) ubamem(uban, ui->ui_flags, ECBUFSIZE*2, 0);
        !           144:                addr->ec_rcr = EC_MDISAB;       /* disable memory */
        !           145:                return (-1);
        !           146:        }
        !           147: #if VAX780
        !           148:        if (cpu == VAX_780 && uba_hd[uban].uh_uba->uba_sr) {
        !           149:                uba_hd[uban].uh_uba->uba_sr = uba_hd[uban].uh_uba->uba_sr;
        !           150:                goto bad;
        !           151:        }
        !           152: #endif
        !           153:        if (ui->ui_alive == 0)          /* Only printf from autoconfig */
        !           154:                printf("ec%d: mem %x-%x\n", ui->ui_unit,
        !           155:                        ui->ui_flags, ui->ui_flags + ECBUFSIZE*CLBYTES - 1);
        !           156:        ui->ui_type = 1;                /* Memory on, allocated */
        !           157:        return (0);
        !           158: }
        !           159: 
        !           160: /*
        !           161:  * Do output DMA to determine interface presence and
        !           162:  * interrupt vector.  DMA is too short to disturb other hosts.
        !           163:  */
        !           164: ecprobe(reg, ui)
        !           165:        caddr_t reg;
        !           166:        struct uba_device *ui;
        !           167: {
        !           168:        register int br, cvec;          /* r11, r10 value-result */
        !           169:        register struct ecdevice *addr = (struct ecdevice *)reg;
        !           170:        register caddr_t ecbuf = (caddr_t) &umem[ui->ui_ubanum][ui->ui_flags];
        !           171: 
        !           172: #ifdef lint
        !           173:        br = 0; cvec = br; br = cvec;
        !           174:        ecrint(0); ecxint(0); eccollide(0);
        !           175: #endif
        !           176: 
        !           177:        /*
        !           178:         * Check that buffer memory was found and enabled.
        !           179:         */
        !           180:        if (ui->ui_type == 0)
        !           181:                return(0);
        !           182:        /*
        !           183:         * Make a one byte packet in what should be buffer #0.
        !           184:         * Submit it for sending.  This should cause an xmit interrupt.
        !           185:         * The xmit interrupt vector is 8 bytes after the receive vector,
        !           186:         * so adjust for this before returning.
        !           187:         */
        !           188:        *(u_short *)ecbuf = (u_short) 03777;
        !           189:        ecbuf[03777] = '\0';
        !           190:        addr->ec_xcr = EC_XINTEN|EC_XWBN;
        !           191:        DELAY(100000);
        !           192:        addr->ec_xcr = EC_XCLR;
        !           193:        if (cvec > 0 && cvec != 0x200) {
        !           194:                if (cvec & 04) {        /* collision interrupt */
        !           195:                        cvec -= 04;
        !           196:                        br += 1;                /* rcv is collision + 1 */
        !           197:                } else {                /* xmit interrupt */
        !           198:                        cvec -= 010;
        !           199:                        br += 2;                /* rcv is xmit + 2 */
        !           200:                }
        !           201:        }
        !           202:        return (1);
        !           203: }
        !           204: 
        !           205: /*
        !           206:  * Interface exists: make available by filling in network interface
        !           207:  * record.  System will initialize the interface when it is ready
        !           208:  * to accept packets.
        !           209:  */
        !           210: ecattach(ui)
        !           211:        struct uba_device *ui;
        !           212: {
        !           213:        struct ec_softc *es = &ec_softc[ui->ui_unit];
        !           214:        register struct ifnet *ifp = &es->es_if;
        !           215:        register struct ecdevice *addr = (struct ecdevice *)ui->ui_addr;
        !           216:        int i, j;
        !           217:        u_char *cp;
        !           218: 
        !           219:        ifp->if_unit = ui->ui_unit;
        !           220:        ifp->if_name = "ec";
        !           221:        ifp->if_mtu = ETHERMTU;
        !           222: 
        !           223:        /*
        !           224:         * Read the ethernet address off the board, one nibble at a time.
        !           225:         */
        !           226:        addr->ec_xcr = EC_UECLR; /* zero address pointer */
        !           227:        addr->ec_rcr = EC_AROM;
        !           228:        cp = es->es_addr;
        !           229: #define        NEXTBIT addr->ec_rcr = EC_AROM|EC_ASTEP; addr->ec_rcr = EC_AROM
        !           230:        for (i=0; i < sizeof (es->es_addr); i++) {
        !           231:                *cp = 0;
        !           232:                for (j=0; j<=4; j+=4) {
        !           233:                        *cp |= ((addr->ec_rcr >> 8) & 0xf) << j;
        !           234:                        NEXTBIT; NEXTBIT; NEXTBIT; NEXTBIT;
        !           235:                }
        !           236:                cp++;
        !           237:        }
        !           238:        printf("ec%d: hardware address %s\n", ui->ui_unit,
        !           239:                ether_sprintf(es->es_addr));
        !           240:        ifp->if_init = ecinit;
        !           241:        ifp->if_ioctl = ecioctl;
        !           242:        ifp->if_output = ether_output;
        !           243:        ifp->if_start = ecstart;
        !           244:        ifp->if_reset = ecreset;
        !           245:        ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
        !           246:        for (i=0; i<16; i++)
        !           247:                es->es_buf[i] 
        !           248:                    = (u_char *)&umem[ui->ui_ubanum][ui->ui_flags + 2048*i];
        !           249:        if_attach(ifp);
        !           250: }
        !           251: 
        !           252: /*
        !           253:  * Reset of interface after UNIBUS reset.
        !           254:  * If interface is on specified uba, reset its state.
        !           255:  */
        !           256: ecreset(unit, uban)
        !           257:        int unit, uban;
        !           258: {
        !           259:        register struct uba_device *ui;
        !           260: 
        !           261:        if (unit >= NEC || (ui = ecinfo[unit]) == 0 || ui->ui_alive == 0 ||
        !           262:            ui->ui_ubanum != uban)
        !           263:                return;
        !           264:        printf(" ec%d", unit);
        !           265:        ec_softc[unit].es_if.if_flags &= ~IFF_RUNNING;
        !           266:        ecinit(unit);
        !           267: }
        !           268: 
        !           269: /*
        !           270:  * Initialization of interface; clear recorded pending
        !           271:  * operations, and reinitialize UNIBUS usage.
        !           272:  */
        !           273: ecinit(unit)
        !           274:        int unit;
        !           275: {
        !           276:        struct ec_softc *es = &ec_softc[unit];
        !           277:        struct ecdevice *addr;
        !           278:        register struct ifnet *ifp = &es->es_if;
        !           279:        int i, s;
        !           280: 
        !           281:        /* not yet, if address still unknown */
        !           282:        if (ifp->if_addrlist == (struct ifaddr *)0)
        !           283:                return;
        !           284: 
        !           285:        /*
        !           286:         * Hang receive buffers and start any pending writes.
        !           287:         * Writing into the rcr also makes sure the memory
        !           288:         * is turned on.
        !           289:         */
        !           290:        if ((ifp->if_flags & IFF_RUNNING) == 0) {
        !           291:                u_short start_read;
        !           292:                addr = (struct ecdevice *)ecinfo[unit]->ui_addr;
        !           293:                s = splimp();
        !           294:                /*
        !           295:                 * write our ethernet address into the address recognition ROM 
        !           296:                 * so we can always use the same EC_READ bits (referencing ROM),
        !           297:                 * in case we change the address sometime.
        !           298:                 * Note that this is safe here as the receiver is NOT armed.
        !           299:                 */
        !           300:                ec_setaddr(es->es_addr, unit);
        !           301:                /*
        !           302:                 * Arm the receiver
        !           303: #ifdef MULTI
        !           304:                if (es->es_if.if_flags & IFF_PROMISC)
        !           305:                        start_read = EC_PROMISC;
        !           306:                else if (es->es_if.if_flags & IFF_MULTI)
        !           307:                        start_read = EC_MULTI;
        !           308:                else
        !           309: #endif MULTI
        !           310:                        start_read = EC_READ;
        !           311:                 */
        !           312:                for (i = ECRHBF; i >= ECRLBF; i--)
        !           313:                        addr->ec_rcr = EC_READ | i;
        !           314:                es->es_if.if_flags &= ~IFF_OACTIVE;
        !           315:                es->es_mask = ~0;
        !           316:                es->es_if.if_flags |= IFF_RUNNING;
        !           317:                if (es->es_if.if_snd.ifq_head)
        !           318:                        (void) ecstart(&es->es_if);
        !           319:                splx(s);
        !           320:        }
        !           321: }
        !           322: 
        !           323: /*
        !           324:  * Start output on interface.  Get another datagram to send
        !           325:  * off of the interface queue, and copy it to the interface
        !           326:  * before starting the output.
        !           327:  */
        !           328: ecstart(ifp)
        !           329: struct ifnet *ifp;
        !           330: {
        !           331:        int unit = ifp->if_unit;
        !           332:        register struct ec_softc *es = &ec_softc[unit];
        !           333:        struct ecdevice *addr;
        !           334:        struct mbuf *m;
        !           335: 
        !           336:        if ((es->es_if.if_flags & IFF_RUNNING) == 0)
        !           337:                return (0);
        !           338:        IF_DEQUEUE(&es->es_if.if_snd, m);
        !           339:        if (m == 0)
        !           340:                return (0);
        !           341:        ecput(es->es_buf[ECTBF], m);
        !           342:        addr = (struct ecdevice *)ecinfo[unit]->ui_addr;
        !           343:        addr->ec_xcr = EC_WRITE|ECTBF;
        !           344:        es->es_if.if_flags |= IFF_OACTIVE;
        !           345:        return (0);
        !           346: }
        !           347: 
        !           348: /*
        !           349:  * Ethernet interface transmitter interrupt.
        !           350:  * Start another output if more data to send.
        !           351:  */
        !           352: ecxint(unit)
        !           353:        int unit;
        !           354: {
        !           355:        register struct ec_softc *es = &ec_softc[unit];
        !           356:        register struct ecdevice *addr =
        !           357:                (struct ecdevice *)ecinfo[unit]->ui_addr;
        !           358: 
        !           359:        if ((es->es_if.if_flags & IFF_OACTIVE) == 0)
        !           360:                return;
        !           361:        if ((addr->ec_xcr&EC_XDONE) == 0 || (addr->ec_xcr&EC_XBN) != ECTBF) {
        !           362:                printf("ec%d: stray xmit interrupt, xcr=%b\n", unit,
        !           363:                        addr->ec_xcr, EC_XBITS);
        !           364:                es->es_if.if_flags &= ~IFF_OACTIVE;
        !           365:                addr->ec_xcr = EC_XCLR;
        !           366:                return;
        !           367:        }
        !           368:        es->es_if.if_opackets++;
        !           369:        es->es_if.if_flags &= ~IFF_OACTIVE;
        !           370:        es->es_mask = ~0;
        !           371:        addr->ec_xcr = EC_XCLR;
        !           372:        if (es->es_if.if_snd.ifq_head)
        !           373:                (void) ecstart(&es->es_if);
        !           374: }
        !           375: 
        !           376: /*
        !           377:  * Collision on ethernet interface.  Do exponential
        !           378:  * backoff, and retransmit.  If have backed off all
        !           379:  * the way print warning diagnostic, and drop packet.
        !           380:  */
        !           381: eccollide(unit)
        !           382:        int unit;
        !           383: {
        !           384:        register struct ec_softc *es = &ec_softc[unit];
        !           385:        register struct ecdevice *addr =
        !           386:            (struct ecdevice *)ecinfo[unit]->ui_addr;
        !           387:        register i;
        !           388:        int delay;
        !           389: 
        !           390:        es->es_if.if_collisions++;
        !           391:        if ((es->es_if.if_flags & IFF_OACTIVE) == 0)
        !           392:                return;
        !           393: 
        !           394:        /*
        !           395:         * Es_mask is a 16 bit number with n low zero bits, with
        !           396:         * n the number of backoffs.  When es_mask is 0 we have
        !           397:         * backed off 16 times, and give up.
        !           398:         */
        !           399:        if (es->es_mask == 0) {
        !           400:                u_short start_read;
        !           401:                es->es_if.if_oerrors++;
        !           402:                log(LOG_ERR, "ec%d: send error\n", unit);
        !           403:                /*
        !           404:                 * Reset interface, then requeue rcv buffers.
        !           405:                 * Some incoming packets may be lost, but that
        !           406:                 * can't be helped.
        !           407:                 */
        !           408:                addr->ec_xcr = EC_UECLR;
        !           409: #ifdef MULTI
        !           410:                if (es->es_if.if_flags & IFF_PROMISC)
        !           411:                        start_read = EC_PROMISC;
        !           412:                else if (es->es_if.if_flags & IFF_MULTI)
        !           413:                        start_read = EC_MULTI;
        !           414:                else
        !           415: #endif MULTI
        !           416:                        start_read = EC_READ;
        !           417:                for (i=ECRHBF; i>=ECRLBF; i--)
        !           418:                        addr->ec_rcr = start_read|i;
        !           419:                /*
        !           420:                 * Reset and transmit next packet (if any).
        !           421:                 */
        !           422:                es->es_if.if_flags &= ~IFF_OACTIVE;
        !           423:                es->es_mask = ~0;
        !           424:                if (es->es_if.if_snd.ifq_head)
        !           425:                        (void) ecstart(&es->es_if);
        !           426:                return;
        !           427:        }
        !           428:        /*
        !           429:         * Do exponential backoff.  Compute delay based on low bits
        !           430:         * of the interval timer (1 bit for each transmission attempt,
        !           431:         * but at most 5 bits).  Then delay for that number of
        !           432:         * slot times.  A slot time is 51.2 microseconds (rounded to 51).
        !           433:         * This does not take into account the time already used to
        !           434:         * process the interrupt.
        !           435:         */
        !           436:        es->es_mask <<= 1;
        !           437:        delay = mfpr(ICR) & 0x1f &~ es->es_mask;
        !           438:        DELAY(delay * 51);
        !           439:        /*
        !           440:         * Clear the controller's collision flag, thus enabling retransmit.
        !           441:         */
        !           442:        addr->ec_xcr = EC_CLEAR;
        !           443: }
        !           444: 
        !           445: /*
        !           446:  * Ethernet interface receiver interrupt.
        !           447:  * If input error just drop packet.
        !           448:  * Otherwise examine 
        !           449:  * packet to determine type.  If can't determine length
        !           450:  * from type, then have to drop packet.  Othewise decapsulate
        !           451:  * packet based on type and pass to type specific higher-level
        !           452:  * input routine.
        !           453:  */
        !           454: ecrint(unit)
        !           455:        int unit;
        !           456: {
        !           457:        struct ecdevice *addr = (struct ecdevice *)ecinfo[unit]->ui_addr;
        !           458: 
        !           459:        while (addr->ec_rcr & EC_RDONE)
        !           460:                ecread(unit);
        !           461: }
        !           462: 
        !           463: ecread(unit)
        !           464:        int unit;
        !           465: {
        !           466:        register struct ec_softc *es = &ec_softc[unit];
        !           467:        struct ecdevice *addr = (struct ecdevice *)ecinfo[unit]->ui_addr;
        !           468:        register struct ether_header *ec;
        !           469:        struct mbuf *m;
        !           470:        int len, off, resid, ecoff, rbuf;
        !           471:        register struct ifqueue *inq;
        !           472:        u_short start_read;
        !           473:        u_char *ecbuf;
        !           474: 
        !           475:        es->es_if.if_ipackets++;
        !           476:        rbuf = addr->ec_rcr & EC_RBN;
        !           477:        if (rbuf < ECRLBF || rbuf > ECRHBF)
        !           478:                panic("ecrint");
        !           479:        ecbuf = es->es_buf[rbuf];
        !           480:        ecoff = *(short *)ecbuf;
        !           481:        if (ecoff <= ECRDOFF || ecoff > 2046) {
        !           482:                es->es_if.if_ierrors++;
        !           483: #ifdef notdef
        !           484:                if (es->es_if.if_ierrors % 100 == 0)
        !           485:                        printf("ec%d: += 100 input errors\n", unit);
        !           486: #endif
        !           487:                goto setup;
        !           488:        }
        !           489: 
        !           490:        /*
        !           491:         * Get input data length.
        !           492:         * Get pointer to ethernet header (in input buffer).
        !           493:         * Deal with trailer protocol: if type is trailer type
        !           494:         * get true type from first 16-bit word past data.
        !           495:         * Remember that type was trailer by setting off.
        !           496:         */
        !           497:        len = ecoff - ECRDOFF - sizeof (struct ether_header);
        !           498:        ec = (struct ether_header *)(ecbuf + ECRDOFF);
        !           499:        ec->ether_type = ntohs((u_short)ec->ether_type);
        !           500: #define        ecdataaddr(ec, off, type)       ((type)(((caddr_t)((ec)+1)+(off))))
        !           501:        if (ec->ether_type >= ETHERTYPE_TRAIL &&
        !           502:            ec->ether_type < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) {
        !           503:                off = (ec->ether_type - ETHERTYPE_TRAIL) * 512;
        !           504:                if (off >= ETHERMTU)
        !           505:                        goto setup;             /* sanity */
        !           506:                ec->ether_type = ntohs(*ecdataaddr(ec, off, u_short *));
        !           507:                resid = ntohs(*(ecdataaddr(ec, off+2, u_short *)));
        !           508:                if (off + resid > len)
        !           509:                        goto setup;             /* sanity */
        !           510:                len = off + resid;
        !           511:        } else
        !           512:                off = 0;
        !           513:        if (len == 0)
        !           514:                goto setup;
        !           515: 
        !           516:        /*
        !           517:         * Pull packet off interface.  Off is nonzero if packet
        !           518:         * has trailing header; ecget will then force this header
        !           519:         * information to be at the front, but we still have to drop
        !           520:         * the type and length which are at the front of any trailer data.
        !           521:         */
        !           522:        m = ecget(ecbuf, len, off, &es->es_if);
        !           523:        if (m)
        !           524:                ether_input(&es->es_if, ec, m);
        !           525:        /*
        !           526:         * Reset for next packet.
        !           527:         */
        !           528: setup:
        !           529: #ifdef MULTI
        !           530:                if (es->es_if.if_flags & IFF_PROMISC)
        !           531:                        start_read = EC_PROMISC;
        !           532:                else if (es->es_if.if_flags & IFF_MULTI)
        !           533:                        start_read = EC_MULTI;
        !           534:                else
        !           535: #endif MULTI
        !           536:                        start_read = EC_READ;
        !           537:        addr->ec_rcr = start_read|EC_RCLR|rbuf;
        !           538: }
        !           539: 
        !           540: /*
        !           541:  * Routine to copy from mbuf chain to transmit
        !           542:  * buffer in UNIBUS memory.
        !           543:  * If packet size is less than the minimum legal size,
        !           544:  * the buffer is expanded.  We probably should zero out the extra
        !           545:  * bytes for security, but that would slow things down.
        !           546:  */
        !           547: ecput(ecbuf, m)
        !           548:        u_char *ecbuf;
        !           549:        struct mbuf *m;
        !           550: {
        !           551:        register struct mbuf *mp;
        !           552:        register int off;
        !           553:        u_char *bp;
        !           554: 
        !           555:        for (off = 2048, mp = m; mp; mp = mp->m_next)
        !           556:                off -= mp->m_len;
        !           557:        if (2048 - off < ETHERMIN + sizeof (struct ether_header))
        !           558:                off = 2048 - ETHERMIN - sizeof (struct ether_header);
        !           559:        *(u_short *)ecbuf = off;
        !           560:        bp = (u_char *)(ecbuf + off);
        !           561:        for (mp = m; mp; mp = mp->m_next) {
        !           562:                register unsigned len = mp->m_len;
        !           563:                u_char *mcp;
        !           564: 
        !           565:                if (len == 0)
        !           566:                        continue;
        !           567:                mcp = mtod(mp, u_char *);
        !           568:                if ((unsigned)bp & 01) {
        !           569:                        *bp++ = *mcp++;
        !           570:                        len--;
        !           571:                }
        !           572:                if (off = (len >> 1)) {
        !           573:                        register u_short *to, *from;
        !           574: 
        !           575:                        to = (u_short *)bp;
        !           576:                        from = (u_short *)mcp;
        !           577:                        do
        !           578:                                *to++ = *from++;
        !           579:                        while (--off > 0);
        !           580:                        bp = (u_char *)to,
        !           581:                        mcp = (u_char *)from;
        !           582:                }
        !           583:                if (len & 01)
        !           584:                        *bp++ = *mcp++;
        !           585:        }
        !           586:        m_freem(m);
        !           587: }
        !           588: 
        !           589: /*
        !           590:  * Routine to copy from UNIBUS memory into mbufs.
        !           591:  * Similar in spirit to if_rubaget.
        !           592:  *
        !           593:  * Warning: This makes the fairly safe assumption that
        !           594:  * mbufs have even lengths.
        !           595:  */
        !           596: struct mbuf *
        !           597: ecget(ecbuf, totlen, off0, ifp)
        !           598:        u_char *ecbuf;
        !           599:        int totlen, off0;
        !           600:        struct ifnet *ifp;
        !           601: {
        !           602:        register struct mbuf *m;
        !           603:        struct mbuf *top = 0, **mp = &top;
        !           604:        register int off = off0, len;
        !           605:        u_char *cp = (ecbuf += ECRDOFF + sizeof (struct ether_header));
        !           606:        u_char *packet_end = cp + totlen;
        !           607: 
        !           608:        if (off) {
        !           609:                off += 2 * sizeof(u_short);
        !           610:                totlen -= 2 *sizeof(u_short);
        !           611:                cp += off;
        !           612:        }
        !           613: 
        !           614:        MGETHDR(m, M_DONTWAIT, MT_DATA);
        !           615:        if (m == 0)
        !           616:                return (0);
        !           617:        m->m_pkthdr.rcvif = ifp;
        !           618:        m->m_pkthdr.len = totlen;
        !           619:        m->m_len = MHLEN;
        !           620: 
        !           621:        while (totlen > 0) {
        !           622:                register int words;
        !           623:                u_char *mcp;
        !           624: 
        !           625:                if (top) {
        !           626:                        MGET(m, M_DONTWAIT, MT_DATA);
        !           627:                        if (m == 0) {
        !           628:                                m_freem(top);
        !           629:                                return (0);
        !           630:                        }
        !           631:                        m->m_len = MLEN;
        !           632:                }
        !           633:                len = min(totlen, (packet_end - cp));
        !           634:                if (len >= MINCLSIZE) {
        !           635:                        MCLGET(m, M_DONTWAIT);
        !           636:                        if (m->m_flags & M_EXT)
        !           637:                                m->m_len = len = min(len, MCLBYTES);
        !           638:                        else
        !           639:                                len = m->m_len;
        !           640:                } else {
        !           641:                        /*
        !           642:                         * Place initial small packet/header at end of mbuf.
        !           643:                         */
        !           644:                        if (len < m->m_len) {
        !           645:                                if (top == 0 && len + max_linkhdr <= m->m_len)
        !           646:                                        m->m_data += max_linkhdr;
        !           647:                                m->m_len = len;
        !           648:                        } else
        !           649:                                len = m->m_len;
        !           650:                }
        !           651:                mcp = mtod(m, u_char *);
        !           652:                if (words = (len >> 1)) {
        !           653:                        register u_short *to, *from;
        !           654: 
        !           655:                        to = (u_short *)mcp;
        !           656:                        from = (u_short *)cp;
        !           657:                        do
        !           658:                                *to++ = *from++;
        !           659:                        while (--words > 0);
        !           660:                        mcp = (u_char *)to;
        !           661:                        cp = (u_char *)from;
        !           662:                }
        !           663:                if (len & 01)
        !           664:                        *mcp++ = *cp++;
        !           665:                *mp = m;
        !           666:                mp = &m->m_next;
        !           667:                totlen -= len;
        !           668:                if (cp == packet_end)
        !           669:                        cp = ecbuf;
        !           670:        }
        !           671:        return (top);
        !           672: bad:
        !           673:        m_freem(top);
        !           674:        return (0);
        !           675: }
        !           676: 
        !           677: /*
        !           678:  * Process an ioctl request.
        !           679:  */
        !           680: ecioctl(ifp, cmd, data)
        !           681:        register struct ifnet *ifp;
        !           682:        int cmd;
        !           683:        caddr_t data;
        !           684: {
        !           685:        register struct ifaddr *ifa = (struct ifaddr *)data;
        !           686:        struct ec_softc *es = &ec_softc[ifp->if_unit];
        !           687:        struct ecdevice *addr;
        !           688:        int s = splimp(), error = 0;
        !           689: 
        !           690:        addr = (struct ecdevice *)(ecinfo[ifp->if_unit]->ui_addr);
        !           691: 
        !           692:        switch (cmd) {
        !           693: 
        !           694:        case SIOCSIFADDR:
        !           695:                ifp->if_flags |= IFF_UP;
        !           696: 
        !           697:                switch (ifa->ifa_addr->sa_family) {
        !           698: #ifdef INET
        !           699:                case AF_INET:
        !           700:                        ecinit(ifp->if_unit);   /* before arpwhohas */
        !           701:                        ((struct arpcom *)ifp)->ac_ipaddr =
        !           702:                                IA_SIN(ifa)->sin_addr;
        !           703:                        arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr);
        !           704:                        break;
        !           705: #endif
        !           706: #ifdef NS
        !           707:                case AF_NS:
        !           708:                    {
        !           709:                        register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
        !           710: 
        !           711:                        if (ns_nullhost(*ina))
        !           712:                                ina->x_host = *(union ns_host *)(es->es_addr);
        !           713:                        else {
        !           714:                                /* 
        !           715:                                 * The manual says we can't change the address 
        !           716:                                 * while the receiver is armed,
        !           717:                                 * so reset everything
        !           718:                                 */
        !           719:                                ifp->if_flags &= ~IFF_RUNNING; 
        !           720:                                bcopy((caddr_t)ina->x_host.c_host,
        !           721:                                    (caddr_t)es->es_addr, sizeof(es->es_addr));
        !           722:                        }
        !           723:                        ecinit(ifp->if_unit); /* does ec_setaddr() */
        !           724:                        break;
        !           725:                    }
        !           726: #endif
        !           727:                default:
        !           728:                        ecinit(ifp->if_unit);
        !           729:                        break;
        !           730:                }
        !           731:                break;
        !           732: 
        !           733:        case SIOCSIFFLAGS:
        !           734:                if ((ifp->if_flags & IFF_UP) == 0 &&
        !           735:                    ifp->if_flags & IFF_RUNNING) {
        !           736:                        addr->ec_xcr = EC_UECLR;
        !           737:                        ifp->if_flags &= ~IFF_RUNNING;
        !           738:                } else if (ifp->if_flags & IFF_UP &&
        !           739:                    (ifp->if_flags & IFF_RUNNING) == 0)
        !           740:                        ecinit(ifp->if_unit);
        !           741:                break;
        !           742: 
        !           743:        default:
        !           744:                error = EINVAL;
        !           745:        }
        !           746:        splx(s);
        !           747:        return (error);
        !           748: }
        !           749: 
        !           750: ec_setaddr(physaddr,unit)
        !           751:        u_char *physaddr;
        !           752:        int unit;
        !           753: {
        !           754:        struct ec_softc *es = &ec_softc[unit];
        !           755:        struct uba_device *ui = ecinfo[unit];
        !           756:        register struct ecdevice *addr = (struct ecdevice *)ui->ui_addr;
        !           757:        register char nibble;
        !           758:        register int i, j;
        !           759: 
        !           760:        /*
        !           761:         * Use the ethernet address supplied
        !           762:         * Note that we do a UECLR here, so the receive buffers
        !           763:         * must be requeued.
        !           764:         */
        !           765:        
        !           766: #ifdef DEBUG
        !           767:        printf("ec_setaddr: setting address for unit %d = %s",
        !           768:                unit, ether_sprintf(physaddr));
        !           769: #endif
        !           770:        addr->ec_xcr = EC_UECLR;
        !           771:        addr->ec_rcr = 0;
        !           772:        /* load requested address */
        !           773:        for (i = 0; i < 6; i++) { /* 6 bytes of address */
        !           774:            es->es_addr[i] = physaddr[i];
        !           775:            nibble = physaddr[i] & 0xf; /* lower nibble */
        !           776:            addr->ec_rcr = (nibble << 8);
        !           777:            addr->ec_rcr = (nibble << 8) + EC_AWCLK; /* latch nibble */
        !           778:            addr->ec_rcr = (nibble << 8);
        !           779:            for (j=0; j < 4; j++) {
        !           780:                addr->ec_rcr = 0;
        !           781:                addr->ec_rcr = EC_ASTEP; /* step counter */
        !           782:                addr->ec_rcr = 0;
        !           783:            }
        !           784:            nibble = (physaddr[i] >> 4) & 0xf; /* upper nibble */
        !           785:            addr->ec_rcr = (nibble << 8);
        !           786:            addr->ec_rcr = (nibble << 8) + EC_AWCLK; /* latch nibble */
        !           787:            addr->ec_rcr = (nibble << 8);
        !           788:            for (j=0; j < 4; j++) {
        !           789:                addr->ec_rcr = 0;
        !           790:                addr->ec_rcr = EC_ASTEP; /* step counter */
        !           791:                addr->ec_rcr = 0;
        !           792:            }
        !           793:        }
        !           794: #ifdef DEBUG
        !           795:        /*
        !           796:         * Read the ethernet address off the board, one nibble at a time.
        !           797:         */
        !           798:        addr->ec_xcr = EC_UECLR;
        !           799:        addr->ec_rcr = 0; /* read RAM */
        !           800:        cp = es->es_addr;
        !           801: #undef NEXTBIT
        !           802: #define        NEXTBIT addr->ec_rcr = EC_ASTEP; addr->ec_rcr = 0
        !           803:        for (i=0; i < sizeof (es->es_addr); i++) {
        !           804:                *cp = 0;
        !           805:                for (j=0; j<=4; j+=4) {
        !           806:                        *cp |= ((addr->ec_rcr >> 8) & 0xf) << j;
        !           807:                        NEXTBIT; NEXTBIT; NEXTBIT; NEXTBIT;
        !           808:                }
        !           809:                cp++;
        !           810:        }
        !           811:        printf("ec_setaddr: RAM address for unit %d = %s",
        !           812:                unit, ether_sprintf(physaddr));
        !           813: #endif
        !           814: }
        !           815: #endif

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