# 2.11BSD#431 - /usr/src/sys/pdpif/if_acc.c

##### Functions

    accattach         X
    accinit           X
    accinputreset     X
    accprobe          X
    accreset          X
    accrint           X
    accstart          X
    accxint           X

##### Variables

    acc_softc         X
    accdriver         X
    accinfo           X
    accstd            X

##### Macros

    ACCUNIT           X

##### struct's

    acc_softc         X
    ifimpcb           X

       1: /*
       2:  * Copyright (c) 1986 Regents of the University of California.
       3:  * All rights reserved.  The Berkeley software License Agreement
       4:  * specifies the terms and conditions for redistribution.
       5:  *
       6:  *	@(#)if_acc.c	1.2 (2.11BSD) 1997/1/19
       7:  */
       8:
       9: #include "acc.h"
      10: #if NACC > 0
      11:
      12: /*
      13:  * ACC LH/DH ARPAnet IMP interface driver.
      14:  * Define "PLI" if connected to a PLI, to take care of PLI ready-line problems
      15:  */
      16:
      17: #include "param.h"
      18: #include "../machine/seg.h"
      19:
      20: #include "systm.h"
      21: #include "mbuf.h"
      22: #include "buf.h"
      23: #include "domain.h"
      24: #include "protosw.h"
      25: #include "socket.h"
      26: #include "../pdpuba/ubavar.h"
      27:
      28: #include "../net/if.h"
      29:
      30: #include "../netinet/in.h"
      31: #include "../netinet/in_systm.h"
      32: #include "../netimp/if_imp.h"
      33:
      34: #include "if_acc.h"
      35: #include "if_uba.h"
      36:
      37: int     accprobe(), accattach(), accrint(), accxint();
      38: struct  uba_device *accinfo[NACC];
      39: u_short accstd[] = { 0 };
      40: struct  uba_driver accdriver =
      41:     { accprobe, 0, accattach, 0, accstd, "acc", accinfo };
      42: #define ACCUNIT(x)  minor(x)
      43:
      44: int accinit(), accstart(), accreset();
      45:
      46: /*
      47:  * "Lower half" of IMP interface driver.
      48:  *
      49:  * Each IMP interface is handled by a common module which handles
      50:  * the IMP-host protocol and a hardware driver which manages the
      51:  * hardware specific details of talking with the IMP.
      52:  *
      53:  * The hardware portion of the IMP driver handles DMA and related
      54:  * management of UNIBUS resources.  The IMP protocol module interprets
      55:  * contents of these messages and "controls" the actions of the
      56:  * hardware module during IMP resets, but not, for instance, during
      57:  * UNIBUS resets.
      58:  *
      59:  * The two modules are coupled at "attach time", and ever after,
      60:  * through the imp interface structure.  Higher level protocols,
      61:  * e.g. IP, interact with the IMP driver, rather than the ACC.
      62:  */
      63: struct  acc_softc {
      64:     struct  ifnet *acc_if;      /* pointer to IMP's ifnet struct */
      65:     struct  impcb *acc_ic;      /* data structure shared with IMP */
      66:     struct  ifuba acc_ifuba;    /* UNIBUS resources */
      67:     struct  mbuf *acc_iq;       /* input reassembly queue */
      68:     short   acc_olen;       /* size of last message sent */
      69:     char    acc_flush;      /* flush remainder of message */
      70: } acc_softc[NACC];
      71:
      72: /*
      73:  * Reset the IMP and cause a transmitter interrupt by
      74:  * performing a null DMA.
      75:  */
      76: accprobe(reg)
      77:     caddr_t reg;
      78: {
      79: #if !pdp11
      80:     register int br, cvec;      /* r11, r10 value-result */
      81:     register struct accdevice *addr = (struct accdevice *)reg;
      82:
      83: #ifdef lint
      84:     br = 0; cvec = br; br = cvec;
      85:     accrint(0); accxint(0);
      86: #endif
      87:     addr->icsr = ACC_RESET; DELAY(5000L);
      88:     addr->ocsr = ACC_RESET; DELAY(5000L);
      89:     addr->ocsr = OUT_BBACK; DELAY(5000L);
      90:     addr->owc = 0;
      91:     addr->ocsr = ACC_IE | ACC_GO; DELAY(5000L);
      92:     addr->ocsr = 0;
      93:     if (cvec && cvec != 0x200)  /* transmit -> receive */
      94:         cvec -= 4;
      95: #ifdef ECHACK
      96:     br = 0x16;
      97: #endif
      98:     return (1);
      99: #endif !pdp11
     100: }
     101:
     102: /*
     103:  * Call the IMP module to allow it to set up its internal
     104:  * state, then tie the two modules together by setting up
     105:  * the back pointers to common data structures.
     106:  */
     107: accattach(ui)
     108:     struct uba_device *ui;
     109: {
     110:     register struct acc_softc *sc = &acc_softc[ui->ui_unit];
     111:     register struct impcb *ip;
     112:     struct ifimpcb {
     113:         struct  ifnet ifimp_if;
     114:         struct  impcb ifimp_impcb;
     115:     } *ifimp;
     116:
     117:     if ((ifimp = (struct ifimpcb *)impattach(ui, accreset)) == 0)
     118:         panic("accattach");
     119:     sc->acc_if = &ifimp->ifimp_if;
     120:     ip = &ifimp->ifimp_impcb;
     121:     sc->acc_ic = ip;
     122:     ip->ic_init = accinit;
     123:     ip->ic_start = accstart;
     124:     sc->acc_ifuba.ifu_flags = UBA_CANTWAIT;
     125: #ifdef notdef
     126:     sc->acc_ifuba.ifu_flags |= UBA_NEEDBDP;
     127: #endif
     128: }
     129:
     130: /*
     131:  * Reset interface after UNIBUS reset.
     132:  * If interface is on specified uba, reset its state.
     133:  */
     134: accreset(unit, uban)
     135:     int unit, uban;
     136: {
     137:     register struct uba_device *ui;
     138:     struct acc_softc *sc;
     139:
     140:     if (unit >= NACC || (ui = accinfo[unit]) == 0 || ui->ui_alive == 0 ||
     141:         ui->ui_ubanum != uban)
     142:         return;
     143:     printf(" acc%d", unit);
     144:     sc = &acc_softc[unit];
     145:     /* must go through IMP to allow it to set state */
     146:     (*sc->acc_if->if_init)(unit);
     147: }
     148:
     149: /*
     150:  * Initialize interface: clear recorded pending operations,
     151:  * and retrieve, and initialize UNIBUS resources.  Note
     152:  * return value is used by IMP init routine to mark IMP
     153:  * unavailable for outgoing traffic.
     154:  */
     155: accinit(unit)
     156:     int unit;
     157: {
     158:     register struct acc_softc *sc;
     159:     register struct uba_device *ui;
     160:     register struct accdevice *addr;
     161:     long info;
     162:     int i;
     163:
     164:     if (unit >= NACC || (ui = accinfo[unit]) == 0 || ui->ui_alive == 0) {
     165:         printf("acc%d: not alive\n", unit);
     166:         return (0);
     167:     }
     168:     sc = &acc_softc[unit];
     169:     /*
     170: 	 * Header length is 0 since we have to passs
     171: 	 * the IMP leader up to the protocol interpretation
     172: 	 * routines.  If we had the header length as
     173: 	 * sizeof(struct imp_leader), then the if_ routines
     174: 	 * would asssume we handle it on input and output.
     175: 	 */
     176:     if (if_ubainit(&sc->acc_ifuba, ui->ui_ubanum, 0,
     177:          (int)btoc(IMPMTU)) == 0) {
     178:         printf("acc%d: can't initialize\n", unit);
     179:         ui->ui_alive = 0;
     180:         return (0);
     181:     }
     182:     addr = (struct accdevice *)ui->ui_addr;
     183:
     184:     /*
     185: 	 * Reset the imp interface;
     186: 	 * the delays are pure guesswork.
     187: 	 */
     188:         addr->ocsr = ACC_RESET; DELAY(5000L);
     189:     addr->ocsr = OUT_BBACK; DELAY(5000L);   /* reset host master ready */
     190:     addr->ocsr = 0;
     191:     if (accinputreset(addr, unit) == 0) {
     192:         ui->ui_alive = 0;
     193:         return (0);
     194:     }
     195:
     196:     /*
     197: 	 * Put up a read.  We can't restart any outstanding writes
     198: 	 * until we're back in synch with the IMP (i.e. we've flushed
     199: 	 * the NOOPs it throws at us).
     200: 	 * Note: IMPMTU includes the leader.
     201: 	 */
     202:     info = sc->acc_ifuba.ifu_r.ifrw_info;
     203:     addr->iba = (u_short)info;
     204:     addr->iwc = -(IMPMTU >> 1);
     205: #ifdef LOOPBACK
     206:     addr->ocsr |= OUT_BBACK;
     207: #endif
     208:     addr->icsr =
     209:         IN_MRDY | ACC_IE | IN_WEN | ((info & 0x30000) >> 12) | ACC_GO;
     210:     return (1);
     211: }
     212:
     213: accinputreset(addr, unit)
     214:     register struct accdevice *addr;
     215:     register int unit;
     216: {
     217:     register int i;
     218:
     219:     addr->icsr = ACC_RESET; DELAY(5000L);
     220:     addr->icsr = IN_MRDY | IN_WEN;      /* close the relay */
     221:     DELAY(10000L);
     222:     /* YECH!!! */
     223:     for (i = 0; i < 500; i++) {
     224:         if ((addr->icsr & IN_HRDY) ||
     225:             (addr->icsr & (IN_RMR | IN_IMPBSY)) == 0)
     226:             return (1);
     227:         addr->icsr = IN_MRDY | IN_WEN; DELAY(10000L);
     228:         /* keep turning IN_RMR off */
     229:     }
     230:     printf("acc%d: imp doesn't respond, icsr=%b\n", unit,
     231:         addr->icsr, ACC_INBITS);
     232:     return (0);
     233: }
     234:
     235: /*
     236:  * Start output on an interface.
     237:  */
     238: accstart(dev)
     239:     dev_t dev;
     240: {
     241:     int unit = ACCUNIT(dev);
     242:     long info;
     243:     register struct acc_softc *sc = &acc_softc[unit];
     244:     register struct accdevice *addr;
     245:     struct mbuf *m;
     246:     u_short cmd;
     247:
     248:     if (sc->acc_ic->ic_oactive)
     249:         goto restart;
     250:
     251:     /*
     252: 	 * Not already active, deqeue a request and
     253: 	 * map it onto the UNIBUS.  If no more
     254: 	 * requeusts, just return.
     255: 	 */
     256:     IF_DEQUEUE(&sc->acc_if->if_snd, m);
     257:     if (m == 0) {
     258:         sc->acc_ic->ic_oactive = 0;
     259:         return;
     260:     }
     261:     sc->acc_olen = if_wubaput(&sc->acc_ifuba, m);
     262:
     263: restart:
     264:     /*
     265: 	 * Have request mapped to UNIBUS for
     266: 	 * transmission; start the output.
     267: 	 */
     268:     addr = (struct accdevice *)accinfo[unit]->ui_addr;
     269:     info = sc->acc_ifuba.ifu_w.ifrw_info;
     270:     addr->oba = (u_short)info;
     271:     addr->owc = -((sc->acc_olen + 1) >> 1);
     272:     cmd = ACC_IE | OUT_ENLB | ((info & 0x30000) >> 12) | ACC_GO;
     273: #ifdef LOOPBACK
     274:     cmd |= OUT_BBACK;
     275: #endif
     276:     addr->ocsr = cmd;
     277:     sc->acc_ic->ic_oactive = 1;
     278: }
     279:
     280: /*
     281:  * Output interrupt handler.
     282:  */
     283: accxint(unit)
     284: {
     285:     register struct acc_softc *sc = &acc_softc[unit];
     286:     register struct accdevice *addr;
     287:
     288:     addr = (struct accdevice *)accinfo[unit]->ui_addr;
     289:     if (sc->acc_ic->ic_oactive == 0) {
     290:         printf("acc%d: stray xmit interrupt, csr=%b\n", unit,
     291:             addr->ocsr, ACC_OUTBITS);
     292:         goto out;
     293:     }
     294:     sc->acc_if->if_opackets++;
     295:     sc->acc_ic->ic_oactive = 0;
     296:     if (addr->ocsr & ACC_ERR) {
     297:         printf("acc%d: output error, ocsr=%b, icsr=%b\n", unit,
     298:             addr->ocsr, ACC_OUTBITS, addr->icsr, ACC_INBITS);
     299:         sc->acc_if->if_oerrors++;
     300:     }
     301:     if (sc->acc_ifuba.ifu_xtofree) {
     302:         m_freem(sc->acc_ifuba.ifu_xtofree);
     303:         sc->acc_ifuba.ifu_xtofree = 0;
     304:     }
     305:     if (sc->acc_if->if_snd.ifq_head)
     306:         accstart(unit);
     307: out:
     308:     return;
     309: }
     310:
     311: /*
     312:  * Input interrupt handler
     313:  */
     314: accrint(unit)
     315: {
     316:     register struct acc_softc *sc = &acc_softc[unit];
     317:     register struct accdevice *addr;
     318:         struct mbuf *m;
     319:     int len;
     320:     long info;
     321:
     322:     addr = (struct accdevice *)accinfo[unit]->ui_addr;
     323:     sc->acc_if->if_ipackets++;
     324:
     325: #ifndef PLI
     326:     if (addr->icsr & ACC_ERR) {
     327: #else
     328:     if (addr->icsr & (ACC_ERR|IN_RMR)) {
     329: #endif PLI
     330:         printf("acc%d: input error, csr=%b\n", unit,
     331:             addr->icsr, ACC_INBITS);
     332:         sc->acc_if->if_ierrors++;
     333:         sc->acc_flush = 1;
     334:
     335:         if(addr->icsr & IN_IMPBSY
     336: #ifdef PLI
     337:            || ((addr->icsr&IN_RMR) && (addr->icsr&IN_HRDY))
     338: #endif PLI
     339:         ){      /* IMP ready line dropped */
     340:             impinput(unit, (struct mbuf *)0);
     341:             goto out;   /* Do NOT re-enable interrupts!!! */
     342:         }
     343:     }
     344:
     345:     if (sc->acc_flush) {
     346:         if (addr->icsr & IN_EOM)
     347:             sc->acc_flush = 0;
     348:         goto setup;
     349:     }
     350:     len = IMPMTU + (addr->iwc << 1);
     351:     if (len < 0 || len > IMPMTU) {
     352:         printf("acc%d: bad length=%d\n", len);
     353:         sc->acc_if->if_ierrors++;
     354:         goto setup;
     355:     }
     356:
     357:     /*
     358: 	 * The next to last parameter is always 0 since using
     359: 	 * trailers on the ARPAnet is insane.
     360: 	 */
     361:     m = if_rubaget(&sc->acc_ifuba, len, 0, &sc->acc_if);
     362:     if (m == 0)
     363:         goto setup;
     364:     if ((addr->icsr & IN_EOM) == 0) {
     365:         if (sc->acc_iq)
     366:             m_cat(sc->acc_iq, m);
     367:         else
     368:             sc->acc_iq = m;
     369:         goto setup;
     370:     }
     371:     if (sc->acc_iq) {
     372:         m_cat(sc->acc_iq, m);
     373:         m = sc->acc_iq;
     374:         sc->acc_iq = 0;
     375:     }
     376:     impinput(unit, m);
     377:
     378: setup:
     379:     /*
     380: 	 * Setup for next message.
     381: 	 */
     382:     info = sc->acc_ifuba.ifu_r.ifrw_info;
     383:     addr->iba = (u_short)info;
     384:     addr->iwc = -(IMPMTU >> 1);
     385:     addr->icsr =
     386:         IN_MRDY | ACC_IE | IN_WEN | ((info & 0x30000) >> 12) | ACC_GO;
     387: out:
     388:     return;
     389: }
     390: #endif

#### Defined functions

accattach defined in line 107; used 2 times

- in line 37-41(2)

accinit defined in line 155; used 2 times

- in line 44, 122

accinputreset defined in line 213; used 1 times

- in line 191

accprobe defined in line 76; used 2 times

- in line 37-41(2)

accreset defined in line 134; used 2 times

- in line 44, 117

accrint defined in line 314; used 2 times

- in line 37, 85

accstart defined in line 238; used 3 times

- in line 44, 123, 306

accxint defined in line 283; used 2 times

- in line 37, 85

#### Defined variables

acc_softc defined in line 70; used 6 times

- in line 110, 144, 168, 243, 285, 316

accdriver defined in line 40; never used
accinfo defined in line 38; used 6 times

- in line 41, 140, 164, 268, 288, 322

accstd defined in line 39; used 1 times

- in line 41

#### Defined struct's

acc_softc defined in line 63; used 12 times

- in line 110(2), 138(2), 158(2), 243(2), 285(2), 316(2)

ifimpcb defined in line 112; used 2 times

- in line 117(2)

#### Defined macros

ACCUNIT defined in line 42; used 1 times

- in line 241

Last modified: 1997-01-19 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 1193 |