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[unix-history] / usr / src / sys / vax / if / if_acc.c

diff --git a/usr/src/sys/vax/if/if_acc.c b/usr/src/sys/vax/if/if_acc.c
index 855a83f..fe0f95a 100644 (file)
--- a/usr/src/sys/vax/if/if_acc.c
+++ b/usr/src/sys/vax/if/if_acc.c
@@ -1,4 +1,4 @@
-/*     if_acc.c        4.1     82/02/01        */
+/*     if_acc.c        4.7     82/02/27        */

 
 #include "acc.h"
 #ifdef NACC > 0
 
 #include "acc.h"
 #ifdef NACC > 0


@@ -16,13 +16,13 @@
 #include "../h/socket.h"
 #include "../h/ubareg.h"
 #include "../h/ubavar.h"
 #include "../h/socket.h"
 #include "../h/ubareg.h"
 #include "../h/ubavar.h"

-#include "../h/accreg.h"

 #include "../h/cpu.h"
 #include "../h/mtpr.h"
 #include "../h/vmmac.h"
 #include "../net/in.h"
 #include "../net/in_systm.h"
 #include "../net/if.h"
 #include "../h/cpu.h"
 #include "../h/mtpr.h"
 #include "../h/vmmac.h"
 #include "../net/in.h"
 #include "../net/in_systm.h"
 #include "../net/if.h"

+#include "../net/if_acc.h"

 #include "../net/if_imp.h"
 #include "../net/if_uba.h"
 
 #include "../net/if_imp.h"
 #include "../net/if_uba.h"
 


@@ -59,7 +59,6 @@ struct        acc_softc {
        struct  mbuf *acc_iq;           /* input reassembly queue */
        short   acc_olen;               /* size of last message sent */
        char    acc_flush;              /* flush remainder of message */
        struct  mbuf *acc_iq;           /* input reassembly queue */
        short   acc_olen;               /* size of last message sent */
        char    acc_flush;              /* flush remainder of message */

-       char    acc_previous;           /* something on input queue */

 } acc_softc[NACC];
 
 /*
 } acc_softc[NACC];
 
 /*


@@ -77,19 +76,13 @@ COUNT(ACCPROBE);
        br = 0; cvec = br; br = cvec;
        accrint(0); accxint(0);
 #endif
        br = 0; cvec = br; br = cvec;
        accrint(0); accxint(0);
 #endif

-       addr->acc_icsr = ACC_RESET;
-       DELAY(500000);
-       addr->acc_ocsr = ACC_RESET;
-       DELAY(500000);
-
-       addr->acc_ocsr = OUT_BBACK;
-       DELAY(500000);
-       addr->acc_owc = 0;
-       addr->acc_ocsr = ACC_IE | ACC_GO;
-       DELAY(500000);
-       addr->acc_ocsr = 0;
-       /* interrupt was for transmit, push back to receive vector */
-       if (cvec && cvec != 0x200)
+       addr->icsr = ACC_RESET; DELAY(5000);
+       addr->ocsr = ACC_RESET; DELAY(5000);
+       addr->ocsr = OUT_BBACK; DELAY(5000);
+       addr->owc = 0;
+       addr->ocsr = ACC_IE | ACC_GO; DELAY(5000);
+       addr->ocsr = 0;
+       if (cvec && cvec != 0x200)      /* transmit -> receive */

                cvec -= 4;
        return (1);
 }
                cvec -= 4;
        return (1);
 }


@@ -111,12 +104,15 @@ accattach(ui)
 
 COUNT(ACCATTACH);
        if ((ifimp = (struct ifimpcb *)impattach(ui)) == 0)
 
 COUNT(ACCATTACH);
        if ((ifimp = (struct ifimpcb *)impattach(ui)) == 0)

-               panic("accattach");             /* XXX */
+               panic("accattach");

        sc->acc_if = &ifimp->ifimp_if;
        ip = &ifimp->ifimp_impcb;
        sc->acc_ic = ip;
        ip->ic_init = accinit;
        ip->ic_start = accstart;
        sc->acc_if = &ifimp->ifimp_if;
        ip = &ifimp->ifimp_impcb;
        sc->acc_ic = ip;
        ip->ic_init = accinit;
        ip->ic_start = accstart;

+#ifdef notdef
+       sc->acc_ifuba.ifu_flags = UBA_NEEDBDP;
+#endif

 }
 
 /*
 }
 
 /*


@@ -141,53 +137,84 @@ COUNT(ACCRESET);
 
 /*
  * Initialize interface: clear recorded pending operations,
 
 /*
  * Initialize interface: clear recorded pending operations,

- * and retrieve, and reinitialize UNIBUS resources.
+ * and retrieve, and initialize UNIBUS resources.  Note
+ * return value is used by IMP init routine to mark IMP
+ * unavailable for outgoing traffic.

  */
 accinit(unit)
        int unit;
 {      
  */
 accinit(unit)
        int unit;
 {      

-       register struct acc_softc *sc = &acc_softc[unit];
-       register struct uba_device *ui = accinfo[unit];
+       register struct acc_softc *sc;
+       register struct uba_device *ui;

        register struct accdevice *addr;
        int x, info;
 
 COUNT(ACCINIT);
        register struct accdevice *addr;
        int x, info;
 
 COUNT(ACCINIT);

-       if (if_ubainit(&sc->acc_ifuba, ui->ui_ubanum,
-             sizeof(struct imp_leader), (int)btop(IMP_MTU)) == 0) {
+       if (unit >= NACC || (ui = accinfo[unit]) == 0 || ui->ui_alive == 0) {
+               printf("acc%d: not alive\n", unit);
+               return (0);
+       }
+       sc = &acc_softc[unit];
+       /*
+        * Header length is 0 since we have to passs
+        * the IMP leader up to the protocol interpretation
+        * routines.  If we had the header length as
+        * sizeof(struct imp_leader), then the if_ routines
+        * would asssume we handle it on input and output.
+        */
+       if (if_ubainit(&sc->acc_ifuba, ui->ui_ubanum, 0, btoc(IMP_MTU)) == 0) {

                printf("acc%d: can't initialize\n", unit);
                printf("acc%d: can't initialize\n", unit);

-               return;
+               goto down;

        }
        addr = (struct accdevice *)ui->ui_addr;
 
        }
        addr = (struct accdevice *)ui->ui_addr;
 

-       /* reset the imp interface. */
+       /*
+        * Reset the imp interface;
+        * the delays are pure guesswork.
+        */

        x = spl5();
        x = spl5();

-       addr->acc_icsr = ACC_RESET;
-        addr->acc_ocsr = ACC_RESET;
-       addr->acc_ocsr = OUT_BBACK;     /* reset host master ready */
-       addr->acc_ocsr = 0;
-       addr->acc_icsr = IN_MRDY;       /* close the relay */
+       addr->icsr = ACC_RESET; DELAY(5000);
+        addr->ocsr = ACC_RESET; DELAY(5000);
+       addr->ocsr = OUT_BBACK; DELAY(1000);    /* reset host master ready */
+       addr->ocsr = 0;

        splx(x);
        splx(x);

-
+       addr->icsr = IN_MRDY | IN_WEN;          /* close the relay */
+       DELAY(5000);

        /* YECH!!! */
        /* YECH!!! */

-       while ((addr->acc_icsr & IN_HRDY) == 0 ||
-              (addr->acc_icsr & (IN_RMR | IN_IMPBSY))) {
-               /* keep turning IN_RMR off */
-               addr->acc_icsr = IN_MRDY;
-               sleep((caddr_t)&lbolt, PZERO);
+       x = 500;
+       while (x-- > 0) {
+               if ((addr->icsr & IN_HRDY) ||
+                   (addr->icsr & (IN_RMR | IN_IMPBSY) == 0))
+                       break;
+               addr->icsr = IN_MRDY | IN_WEN;
+               DELAY(5000);                    /* keep turning IN_RMR off */
+       }
+       if (x <= 0) {
+               printf("acc%d: imp doesn't respond, icsr=%b\n", unit,
+                       addr->icsr, ACC_INBITS);
+               goto down;

        }
 
        /*
         * Put up a read.  We can't restart any outstanding writes
         * until we're back in synch with the IMP (i.e. we've flushed
         * the NOOPs it throws at us).
        }
 
        /*
         * Put up a read.  We can't restart any outstanding writes
         * until we're back in synch with the IMP (i.e. we've flushed
         * the NOOPs it throws at us).

+        * Note: IMP_MTU includes the leader.

         */
        x = spl5();
        info = sc->acc_ifuba.ifu_r.ifrw_info;
         */
        x = spl5();
        info = sc->acc_ifuba.ifu_r.ifrw_info;

-       addr->acc_iba = (u_short)info;
-       addr->acc_iwc = -(sizeof(struct imp_leader) + IMP_MTU) >> 1;
-       addr->acc_icsr = 
+       addr->iba = (u_short)info;
+       addr->iwc = -(IMP_MTU >> 1);
+#ifdef LOOPBACK
+       addr->ocsr |= OUT_BBACK;
+#endif
+       addr->icsr = 

                IN_MRDY | ACC_IE | IN_WEN | ((info & 0x30000) >> 12) | ACC_GO;
        splx(x);
                IN_MRDY | ACC_IE | IN_WEN | ((info & 0x30000) >> 12) | ACC_GO;
        splx(x);

+       return (1);
+down:
+       ui->ui_alive = 0;
+       return (0);

 }
 
 /*
 }
 
 /*


@@ -197,7 +224,6 @@ accstart(dev)
        dev_t dev;
 {
        int unit = ACCUNIT(dev), info;
        dev_t dev;
 {
        int unit = ACCUNIT(dev), info;

-       struct uba_device *ui = accinfo[unit];

        register struct acc_softc *sc = &acc_softc[unit];
        register struct accdevice *addr;
        struct mbuf *m;
        register struct acc_softc *sc = &acc_softc[unit];
        register struct accdevice *addr;
        struct mbuf *m;


@@ -221,16 +247,20 @@ COUNT(ACCSTART);
 
 restart:
        /*
 
 restart:
        /*

-        * Have request mapped to UNIBUS for transmission.
-        * Purge any stale data from the BDP, and start the output.
+        * Have request mapped to UNIBUS for
+        * transmission; start the output.

         */
         */

-       UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_w.ifrw_bdp);
-       addr = (struct accdevice *)ui->ui_addr;
+       if (sc->acc_ifuba.ifu_flags & UBA_NEEDBDP)
+               UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_w.ifrw_bdp);
+       addr = (struct accdevice *)accinfo[unit]->ui_addr;

        info = sc->acc_ifuba.ifu_w.ifrw_info;
        info = sc->acc_ifuba.ifu_w.ifrw_info;

-       addr->acc_oba = (u_short)info;
-       addr->acc_owc = -((sc->acc_olen + 1) >> 1);
+       addr->oba = (u_short)info;
+       addr->owc = -((sc->acc_olen + 1) >> 1);

        cmd = ACC_IE | OUT_ENLB | ((info & 0x30000) >> 12) | ACC_GO;
        cmd = ACC_IE | OUT_ENLB | ((info & 0x30000) >> 12) | ACC_GO;

-       addr->acc_ocsr = cmd;
+#ifdef LOOPBACK
+       cmd |= OUT_BBACK;
+#endif
+       addr->ocsr = cmd;

        sc->acc_ic->ic_oactive = 1;
 }
 
        sc->acc_ic->ic_oactive = 1;
 }
 


@@ -239,30 +269,28 @@ restart:
  */
 accxint(unit)
 {
  */
 accxint(unit)
 {

-       register struct uba_device *ui = accinfo[unit];

        register struct acc_softc *sc = &acc_softc[unit];
        register struct accdevice *addr;
 
 COUNT(ACCXINT);
        if (sc->acc_ic->ic_oactive == 0) {
        register struct acc_softc *sc = &acc_softc[unit];
        register struct accdevice *addr;
 
 COUNT(ACCXINT);
        if (sc->acc_ic->ic_oactive == 0) {

-               printf("acc%d: stray output interrupt\n", unit);
+               printf("acc%d: stray xmit interrupt\n", unit);

                return;
        }
                return;
        }

-       addr = (struct accdevice *)ui->ui_addr;
+       addr = (struct accdevice *)accinfo[unit]->ui_addr;

        sc->acc_if->if_opackets++;
        sc->acc_ic->ic_oactive = 0;
        sc->acc_if->if_opackets++;
        sc->acc_ic->ic_oactive = 0;

-       if (addr->acc_ocsr & ACC_ERR)
+       if (addr->ocsr & ACC_ERR) {

                printf("acc%d: output error, csr=%b\n", unit,
                printf("acc%d: output error, csr=%b\n", unit,

-                       addr->acc_ocsr, ACC_OUTBITS);
-       if (sc->acc_if->if_snd.ifq_head == 0) {
+                       addr->ocsr, ACC_OUTBITS);

                sc->acc_if->if_oerrors++;
                sc->acc_if->if_oerrors++;

-               if (sc->acc_ifuba.ifu_xtofree) {
-                       m_freem(sc->acc_ifuba.ifu_xtofree);
-                       sc->acc_ifuba.ifu_xtofree = 0;
-               }
-               return;

        }
        }

-       accstart(unit);
+       if (sc->acc_ifuba.ifu_xtofree) {
+               m_freem(sc->acc_ifuba.ifu_xtofree);
+               sc->acc_ifuba.ifu_xtofree = 0;
+       }
+       if (sc->acc_if->if_snd.ifq_head)
+               accstart(unit);

 }
 
 /*
 }
 
 /*


@@ -282,21 +310,27 @@ COUNT(ACCRINT);
        /*
         * Purge BDP; flush message if error indicated.
         */
        /*
         * Purge BDP; flush message if error indicated.
         */

-       UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_r.ifrw_bdp);
+       if (sc->acc_ifuba.ifu_flags & UBA_NEEDBDP)
+               UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_r.ifrw_bdp);

        addr = (struct accdevice *)accinfo[unit]->ui_addr;
        addr = (struct accdevice *)accinfo[unit]->ui_addr;

-       if (addr->acc_icsr & ACC_ERR) {
-               printf("acc%d: recv error, csr=%b\n", unit,
-                   addr->acc_icsr, ACC_INBITS);
+       if (addr->icsr & ACC_ERR) {
+               printf("acc%d: input error, csr=%b\n", unit,
+                   addr->icsr, ACC_INBITS);

                sc->acc_if->if_ierrors++;
                sc->acc_flush = 1;
        }
 
        if (sc->acc_flush) {
                sc->acc_if->if_ierrors++;
                sc->acc_flush = 1;
        }
 
        if (sc->acc_flush) {

-               if (addr->acc_icsr & IN_EOM)
+               if (addr->icsr & IN_EOM)

                        sc->acc_flush = 0;
                goto setup;
        }
                        sc->acc_flush = 0;
                goto setup;
        }

-       len = sizeof(struct imp_leader) + (addr->acc_iwc << 1);
+       len = IMP_MTU + (addr->iwc << 1);
+       if (len < 0 || len > IMP_MTU) {
+               printf("acc%d: bad length=%d\n", len);
+               sc->acc_if->if_ierrors++;
+               goto setup;
+       }

 
        /*
         * The last parameter is always 0 since using
 
        /*
         * The last parameter is always 0 since using


@@ -305,22 +339,17 @@ COUNT(ACCRINT);
        m = if_rubaget(&sc->acc_ifuba, len, 0);
        if (m == 0)
                goto setup;
        m = if_rubaget(&sc->acc_ifuba, len, 0);
        if (m == 0)
                goto setup;

-       if ((addr->acc_icsr & IN_EOM) == 0) {
-               if (sc->acc_previous)
+       if ((addr->icsr & IN_EOM) == 0) {
+               if (sc->acc_iq)

                        m_cat(sc->acc_iq, m);
                        m_cat(sc->acc_iq, m);

-               else {
+               else

                        sc->acc_iq = m;
                        sc->acc_iq = m;

-                       sc->acc_previous = 1;
-               }

                goto setup;
        }
                goto setup;
        }

-       /* adjust message length for padding. */
-       m->m_len -= 2;
-       if (sc->acc_previous) {
+       if (sc->acc_iq) {

                m_cat(sc->acc_iq, m);
                m = sc->acc_iq;
                sc->acc_iq = 0;
                m_cat(sc->acc_iq, m);
                m = sc->acc_iq;
                sc->acc_iq = 0;

-               sc->acc_previous = 0;

        }
        impinput(unit, m);
 
        }
        impinput(unit, m);
 


@@ -329,9 +358,9 @@ setup:
         * Setup for next message.
         */
        info = sc->acc_ifuba.ifu_r.ifrw_info;
         * Setup for next message.
         */
        info = sc->acc_ifuba.ifu_r.ifrw_info;

-       addr->acc_iba = (u_short)info;
-       addr->acc_iwc = - (sizeof(struct imp_leader) + IMP_MTU) >> 1;
-       addr->acc_icsr =
+       addr->iba = (u_short)info;
+       addr->iwc = -(IMP_MTU >> 1);
+       addr->icsr =

                IN_MRDY | ACC_IE | IN_WEN | ((info & 0x30000) >> 12) | ACC_GO;
 }
 #endif
                IN_MRDY | ACC_IE | IN_WEN | ((info & 0x30000) >> 12) | ACC_GO;
 }
 #endif