Return to if_acc.c CVS log

Up to [Net/2] / Net2 / arch / vax / if

Annotation of Net2/arch/vax/if/if_acc.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. All advertising materials mentioning features or use of this software
        !            14:  *    must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Berkeley and its contributors.
        !            17:  * 4. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)if_acc.c    7.8 (Berkeley) 12/16/90
        !            34:  */
        !            35: 
        !            36: #include "acc.h"
        !            37: #if NACC > 0
        !            38: 
        !            39: /*
        !            40:  * ACC LH/DH ARPAnet IMP interface driver.
        !            41:  */
        !            42: #include "machine/pte.h"
        !            43: 
        !            44: #include "sys/param.h"
        !            45: #include "sys/systm.h"
        !            46: #include "sys/mbuf.h"
        !            47: #include "sys/buf.h"
        !            48: #include "sys/protosw.h"
        !            49: #include "sys/socket.h"
        !            50: #include "sys/vmmac.h"
        !            51: 
        !            52: #include "net/if.h"
        !            53: #include "netimp/if_imp.h"
        !            54: 
        !            55: #include "../include/cpu.h"
        !            56: #include "../include/mtpr.h"
        !            57: #include "if_accreg.h"
        !            58: #include "if_uba.h"
        !            59: #include "../uba/ubareg.h"
        !            60: #include "../uba/ubavar.h"
        !            61: 
        !            62: int     accprobe(), accattach(), accrint(), accxint();
        !            63: struct  uba_device *accinfo[NACC];
        !            64: u_short accstd[] = { 0 };
        !            65: struct  uba_driver accdriver =
        !            66:        { accprobe, 0, accattach, 0, accstd, "acc", accinfo };
        !            67: 
        !            68: int    accinit(), accoutput(), accdown(), accreset();
        !            69: 
        !            70: /*
        !            71:  * "Lower half" of IMP interface driver.
        !            72:  *
        !            73:  * Each IMP interface is handled by a common module which handles
        !            74:  * the IMP-host protocol and a hardware driver which manages the
        !            75:  * hardware specific details of talking with the IMP.
        !            76:  *
        !            77:  * The hardware portion of the IMP driver handles DMA and related
        !            78:  * management of UNIBUS resources.  The IMP protocol module interprets
        !            79:  * contents of these messages and "controls" the actions of the
        !            80:  * hardware module during IMP resets, but not, for instance, during
        !            81:  * UNIBUS resets.
        !            82:  *
        !            83:  * The two modules are coupled at "attach time", and ever after,
        !            84:  * through the imp interface structure.  Higher level protocols,
        !            85:  * e.g. IP, interact with the IMP driver, rather than the ACC.
        !            86:  */
        !            87: struct acc_softc {
        !            88:        struct  imp_softc *acc_imp;     /* data structure shared with IMP */
        !            89:        struct  ifuba acc_ifuba;        /* UNIBUS resources */
        !            90:        struct  mbuf *acc_iq;           /* input reassembly queue */
        !            91:        short   acc_olen;               /* size of last message sent */
        !            92:        char    acc_flush;              /* flush remainder of message */
        !            93: } acc_softc[NACC];
        !            94: 
        !            95: /*
        !            96:  * Reset the IMP and cause a transmitter interrupt by
        !            97:  * performing a null DMA.
        !            98:  */
        !            99: accprobe(reg)
        !           100:        caddr_t reg;
        !           101: {
        !           102:        register int br, cvec;          /* r11, r10 value-result */
        !           103:        register struct accdevice *addr = (struct accdevice *)reg;
        !           104: 
        !           105: #ifdef lint
        !           106:        br = 0; cvec = br; br = cvec;
        !           107:        accrint(0); accxint(0);
        !           108: #endif
        !           109:        addr->icsr = ACC_RESET; DELAY(5000);
        !           110:        addr->ocsr = ACC_RESET; DELAY(5000);
        !           111:        addr->ocsr = OUT_BBACK; DELAY(5000);
        !           112:        addr->owc = 0;
        !           113:        addr->ocsr = ACC_IE | ACC_GO; DELAY(5000);
        !           114:        addr->ocsr = 0;
        !           115:        if (cvec && cvec != 0x200)      /* transmit -> receive */
        !           116:                cvec -= 4;
        !           117:        return (1);
        !           118: }
        !           119: 
        !           120: /*
        !           121:  * Call the IMP module to allow it to set up its internal
        !           122:  * state, then tie the two modules together by setting up
        !           123:  * the back pointers to common data structures.
        !           124:  */
        !           125: accattach(ui)
        !           126:        register struct uba_device *ui;
        !           127: {
        !           128:        register struct acc_softc *sc = &acc_softc[ui->ui_unit];
        !           129:        register struct impcb *ip;
        !           130: 
        !           131:        if ((sc->acc_imp = impattach(ui->ui_driver->ud_dname, ui->ui_unit,
        !           132:            accreset)) == 0)
        !           133:                return;
        !           134:        ip = &sc->acc_imp->imp_cb;
        !           135:        ip->ic_init = accinit;
        !           136:        ip->ic_output = accoutput;
        !           137:        ip->ic_down = accdown;
        !           138:        sc->acc_ifuba.ifu_flags = UBA_CANTWAIT;
        !           139: #ifdef notdef
        !           140:        sc->acc_ifuba.ifu_flags |= UBA_NEEDBDP;
        !           141: #endif
        !           142: }
        !           143: 
        !           144: /*
        !           145:  * Reset interface after UNIBUS reset.
        !           146:  * If interface is on specified uba, reset its state.
        !           147:  */
        !           148: accreset(unit, uban)
        !           149:        int unit, uban;
        !           150: {
        !           151:        register struct uba_device *ui;
        !           152:        struct acc_softc *sc;
        !           153: 
        !           154:        if (unit >= NACC || (ui = accinfo[unit]) == 0 || ui->ui_alive == 0 ||
        !           155:            ui->ui_ubanum != uban)
        !           156:                return;
        !           157:        printf(" acc%d", unit);
        !           158:        sc = &acc_softc[unit];
        !           159:        sc->acc_imp->imp_if.if_flags &= ~IFF_RUNNING;
        !           160:        accoflush(unit);
        !           161:        /* must go through IMP to allow it to set state */
        !           162:        (*sc->acc_imp->imp_if.if_init)(sc->acc_imp->imp_if.if_unit);
        !           163: }
        !           164: 
        !           165: /*
        !           166:  * Initialize interface: clear recorded pending operations,
        !           167:  * and retrieve, and initialize UNIBUS resources.  Note
        !           168:  * return value is used by IMP init routine to mark IMP
        !           169:  * unavailable for outgoing traffic.
        !           170:  */
        !           171: accinit(unit)
        !           172:        int unit;
        !           173: {      
        !           174:        register struct acc_softc *sc;
        !           175:        register struct uba_device *ui;
        !           176:        register struct accdevice *addr;
        !           177:        int info;
        !           178: 
        !           179:        if (unit >= NACC || (ui = accinfo[unit]) == 0 || ui->ui_alive == 0) {
        !           180:                printf("acc%d: not alive\n", unit);
        !           181:                return (0);
        !           182:        }
        !           183:        sc = &acc_softc[unit];
        !           184:        /*
        !           185:         * Header length is 0 since we have to passs
        !           186:         * the IMP leader up to the protocol interpretation
        !           187:         * routines.  If we had the header length as
        !           188:         * sizeof(struct imp_leader), then the if_ routines
        !           189:         * would asssume we handle it on input and output.
        !           190:         */
        !           191:        if ((sc->acc_imp->imp_if.if_flags & IFF_RUNNING) == 0 &&
        !           192:            if_ubainit(&sc->acc_ifuba, ui->ui_ubanum, 0,
        !           193:             (int)btoc(IMP_RCVBUF)) == 0) {
        !           194:                printf("acc%d: can't initialize\n", unit);
        !           195:                sc->acc_imp->imp_if.if_flags &= ~(IFF_UP | IFF_RUNNING);
        !           196:                return (0);
        !           197:        }
        !           198:        sc->acc_imp->imp_if.if_flags |= IFF_RUNNING;
        !           199:        addr = (struct accdevice *)ui->ui_addr;
        !           200: 
        !           201:        /*
        !           202:         * Reset the imp interface;
        !           203:         * the delays are pure guesswork.
        !           204:         */
        !           205:         addr->ocsr = ACC_RESET; DELAY(5000);
        !           206:        addr->ocsr = OUT_BBACK; DELAY(5000);    /* reset host master ready */
        !           207:        addr->ocsr = 0;
        !           208:        if (accinputreset(addr, unit) == 0) {
        !           209:                ui->ui_alive = 0;
        !           210:                return (0);
        !           211:        }
        !           212: 
        !           213:        /*
        !           214:         * Put up a read.  We can't restart any outstanding writes
        !           215:         * until we're back in synch with the IMP (i.e. we've flushed
        !           216:         * the NOOPs it throws at us).
        !           217:         * Note: IMP_RCVBUF includes the leader.
        !           218:         */
        !           219:        info = sc->acc_ifuba.ifu_r.ifrw_info;
        !           220:        addr->iba = (u_short)info;
        !           221:        addr->iwc = -((IMP_RCVBUF) >> 1);
        !           222: #ifdef LOOPBACK
        !           223:        addr->ocsr |= OUT_BBACK;
        !           224: #endif
        !           225:        addr->icsr = 
        !           226:                IN_MRDY | ACC_IE | IN_WEN | ((info & 0x30000) >> 12) | ACC_GO;
        !           227:        return (1);
        !           228: }
        !           229: 
        !           230: accinputreset(addr, unit)
        !           231:        register struct accdevice *addr;
        !           232:        register int unit;
        !           233: {
        !           234:        register int i;
        !           235: 
        !           236:        addr->icsr = ACC_RESET; DELAY(5000);
        !           237:        addr->icsr = IN_MRDY | IN_WEN;          /* close the relay */
        !           238:        DELAY(10000);
        !           239:        /* YECH!!! */
        !           240:        for (i = 0; i < 500; i++) {
        !           241:                if ((addr->icsr & IN_HRDY) ||
        !           242:                    (addr->icsr & (IN_RMR | IN_IMPBSY)) == 0)
        !           243:                        return (1);
        !           244:                addr->icsr = IN_MRDY | IN_WEN; DELAY(10000);
        !           245:                /* keep turning IN_RMR off */
        !           246:        }
        !           247:        printf("acc%d: imp doesn't respond, icsr=%b\n", unit,
        !           248:                addr->icsr, ACC_INBITS);
        !           249:        return (0);
        !           250: }
        !           251: 
        !           252: /*
        !           253:  * Drop the host ready line to mark host down.
        !           254:  */
        !           255: accdown(unit)
        !           256:        int unit;
        !           257: {
        !           258:        register struct accdevice *addr;
        !           259: 
        !           260:        addr = (struct accdevice *)(accinfo[unit]->ui_addr);
        !           261:         addr->ocsr = ACC_RESET;
        !           262:        DELAY(5000);
        !           263:        addr->ocsr = OUT_BBACK;         /* reset host master ready */
        !           264:        accoflush(unit);
        !           265:        return (1);
        !           266: }
        !           267: 
        !           268: accoflush(unit)
        !           269:        int unit;
        !           270: {
        !           271:        register struct acc_softc *sc = &acc_softc[unit];
        !           272: 
        !           273:        sc->acc_imp->imp_cb.ic_oactive = 0;
        !           274:        if (sc->acc_ifuba.ifu_xtofree) {
        !           275:                m_freem(sc->acc_ifuba.ifu_xtofree);
        !           276:                sc->acc_ifuba.ifu_xtofree = 0;
        !           277:        }
        !           278: }
        !           279: 
        !           280: /*
        !           281:  * Start output on an interface.
        !           282:  */
        !           283: accoutput(unit, m)
        !           284:        int unit;
        !           285:        struct mbuf *m;
        !           286: {
        !           287:        int info;
        !           288:        register struct acc_softc *sc = &acc_softc[unit];
        !           289:        register struct accdevice *addr;
        !           290:        u_short cmd;
        !           291: 
        !           292:        sc->acc_olen = if_wubaput(&sc->acc_ifuba, m);
        !           293:        /*
        !           294:         * Have request mapped to UNIBUS for
        !           295:         * transmission; start the output.
        !           296:         */
        !           297:        if (sc->acc_ifuba.ifu_flags & UBA_NEEDBDP)
        !           298:                UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_w.ifrw_bdp);
        !           299:        addr = (struct accdevice *)accinfo[unit]->ui_addr;
        !           300:        info = sc->acc_ifuba.ifu_w.ifrw_info;
        !           301:        addr->oba = (u_short)info;
        !           302:        addr->owc = -((sc->acc_olen + 1) >> 1);
        !           303:        cmd = ACC_IE | OUT_ENLB | ((info & 0x30000) >> 12) | ACC_GO;
        !           304: #ifdef LOOPBACK
        !           305:        cmd |= OUT_BBACK;
        !           306: #endif
        !           307:        addr->ocsr = cmd;
        !           308:        sc->acc_imp->imp_cb.ic_oactive = 1;
        !           309: }
        !           310: 
        !           311: /*
        !           312:  * Output interrupt handler.
        !           313:  */
        !           314: accxint(unit)
        !           315:        int unit;
        !           316: {
        !           317:        register struct acc_softc *sc = &acc_softc[unit];
        !           318:        register struct accdevice *addr;
        !           319: 
        !           320:        addr = (struct accdevice *)accinfo[unit]->ui_addr;
        !           321:        if (sc->acc_imp->imp_cb.ic_oactive == 0) {
        !           322:                printf("acc%d: stray xmit interrupt, csr=%b\n", unit,
        !           323:                        addr->ocsr, ACC_OUTBITS);
        !           324:                return;
        !           325:        }
        !           326:        sc->acc_imp->imp_if.if_opackets++;
        !           327:        sc->acc_imp->imp_cb.ic_oactive = 0;
        !           328:        if (addr->ocsr & ACC_ERR) {
        !           329:                printf("acc%d: output error, ocsr=%b, icsr=%b\n", unit,
        !           330:                        addr->ocsr, ACC_OUTBITS, addr->icsr, ACC_INBITS);
        !           331:                sc->acc_imp->imp_if.if_oerrors++;
        !           332:        }
        !           333:        if (sc->acc_ifuba.ifu_xtofree) {
        !           334:                m_freem(sc->acc_ifuba.ifu_xtofree);
        !           335:                sc->acc_ifuba.ifu_xtofree = 0;
        !           336:        }
        !           337:        impstart(sc->acc_imp);
        !           338: }
        !           339: 
        !           340: /*
        !           341:  * Input interrupt handler
        !           342:  */
        !           343: accrint(unit)
        !           344:        int unit;
        !           345: {
        !           346:        register struct acc_softc *sc = &acc_softc[unit];
        !           347:        register struct accdevice *addr;
        !           348:        struct mbuf *m;
        !           349:        int len, info;
        !           350: 
        !           351:        addr = (struct accdevice *)accinfo[unit]->ui_addr;
        !           352:        sc->acc_imp->imp_if.if_ipackets++;
        !           353: 
        !           354:        /*
        !           355:         * Purge BDP; flush message if error indicated.
        !           356:         */
        !           357:        if (sc->acc_ifuba.ifu_flags & UBA_NEEDBDP)
        !           358:                UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_r.ifrw_bdp);
        !           359:        if (addr->icsr & ACC_ERR) {
        !           360:                printf("acc%d: input error, csr=%b\n", unit,
        !           361:                    addr->icsr, ACC_INBITS);
        !           362:                sc->acc_imp->imp_if.if_ierrors++;
        !           363:                sc->acc_flush = 1;
        !           364:        }
        !           365: 
        !           366:        if (sc->acc_flush) {
        !           367:                if (addr->icsr & IN_EOM)
        !           368:                        sc->acc_flush = 0;
        !           369:                goto setup;
        !           370:        }
        !           371:        len = IMP_RCVBUF + (addr->iwc << 1);
        !           372:        if (len < 0 || len > IMP_RCVBUF) {
        !           373:                printf("acc%d: bad length=%d\n", unit, len);
        !           374:                sc->acc_imp->imp_if.if_ierrors++;
        !           375:                goto setup;
        !           376:        }
        !           377: 
        !           378:        /*
        !           379:         * The offset parameter is always 0 since using
        !           380:         * trailers on the ARPAnet is insane.
        !           381:         */
        !           382:        m = if_rubaget(&sc->acc_ifuba, len, 0, &sc->acc_imp->imp_if);
        !           383:        if (m == 0)
        !           384:                goto setup;
        !           385:        if ((addr->icsr & IN_EOM) == 0) {
        !           386:                if (sc->acc_iq)
        !           387:                        m_cat(sc->acc_iq, m);
        !           388:                else
        !           389:                        sc->acc_iq = m;
        !           390:                goto setup;
        !           391:        }
        !           392:        if (sc->acc_iq) {
        !           393:                m_cat(sc->acc_iq, m);
        !           394:                m = sc->acc_iq;
        !           395:                sc->acc_iq = 0;
        !           396:        }
        !           397:        impinput(unit, m);
        !           398: 
        !           399: setup:
        !           400:        /*
        !           401:         * Setup for next message.
        !           402:         */
        !           403:        info = sc->acc_ifuba.ifu_r.ifrw_info;
        !           404:        addr->iba = (u_short)info;
        !           405:        addr->iwc = -((IMP_RCVBUF)>> 1);
        !           406:        addr->icsr =
        !           407:                IN_MRDY | ACC_IE | IN_WEN | ((info & 0x30000) >> 12) | ACC_GO;
        !           408: }
        !           409: #endif

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.