X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/a0b7c7fb19b3c0f54cdd3c30d33b8c0c2348dfbe..667b32867c6dffc35ca4222282de798640f1aaf2:/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 836c1d4631..8adb258cd6 100644
--- a/usr/src/sys/vax/if/if_acc.c
+++ b/usr/src/sys/vax/if/if_acc.c
@@ -1,30 +1,36 @@
-/*	if_acc.c	4.2	82/02/01	*/
+/*
+ * Copyright (c) 1982 Regents of the University of California.
+ * All rights reserved.  The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ *
+ *	@(#)if_acc.c	6.5 (Berkeley) %G%
+ */
 
 #include "acc.h"
-#ifdef NACC > 0
+#if NACC > 0
 
 /*
  * ACC LH/DH ARPAnet IMP interface driver.
  */
+#include "../machine/pte.h"
+
+#include "param.h"
+#include "systm.h"
+#include "mbuf.h"
+#include "buf.h"
+#include "protosw.h"
+#include "socket.h"
+#include "vmmac.h"
 
-#include "../h/param.h"
-#include "../h/systm.h"
-#include "../h/mbuf.h"
-#include "../h/pte.h"
-#include "../h/buf.h"
-#include "../h/protosw.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 "../net/if_imp.h"
-#include "../net/if_uba.h"
+#include "../netimp/if_imp.h"
+
+#include "../vax/cpu.h"
+#include "../vax/mtpr.h"
+#include "if_accreg.h"
+#include "if_uba.h"
+#include "../vaxuba/ubareg.h"
+#include "../vaxuba/ubavar.h"
 
 int     accprobe(), accattach(), accrint(), accxint();
 struct  uba_device *accinfo[NACC];
@@ -71,24 +77,17 @@ accprobe(reg)
 	register int br, cvec;		/* r11, r10 value-result */
 	register struct accdevice *addr = (struct accdevice *)reg;
 
-COUNT(ACCPROBE);
 #ifdef lint
 	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);
 }
@@ -108,14 +107,17 @@ accattach(ui)
 		struct	impcb ifimp_impcb;
 	} *ifimp;
 
-COUNT(ACCATTACH);
-	if ((ifimp = (struct ifimpcb *)impattach(ui)) == 0)
-		panic("accattach");		/* XXX */
+	if ((ifimp = (struct ifimpcb *)impattach(ui, accreset)) == 0)
+		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_ifuba.ifu_flags = UBA_CANTWAIT;
+#ifdef notdef
+	sc->acc_ifuba.ifu_flags |= UBA_NEEDBDP;
+#endif
 }
 
 /*
@@ -128,71 +130,100 @@ accreset(unit, uban)
 	register struct uba_device *ui;
 	struct acc_softc *sc;
 
-COUNT(ACCRESET);
 	if (unit >= NACC || (ui = accinfo[unit]) == 0 || ui->ui_alive == 0 ||
 	    ui->ui_ubanum != uban)
 		return;
 	printf(" acc%d", unit);
 	sc = &acc_softc[unit];
+	sc->acc_if->if_flags &= ~IFF_RUNNING;
 	/* must go through IMP to allow it to set state */
 	(*sc->acc_if->if_init)(unit);
 }
 
 /*
  * 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;
 {	
-	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;
+	int 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,
+	     (int)btoc(IMPMTU)) == 0) {
 		printf("acc%d: can't initialize\n", unit);
-		return;
+		ui->ui_alive = 0;
+		return (0);
 	}
+	sc->acc_if->if_flags |= IFF_RUNNING;
 	addr = (struct accdevice *)ui->ui_addr;
 
 	/*
-	 * Reset the imp interface.
-	 * the delays are totally guesses
+	 * Reset the imp interface;
+	 * the delays are pure guesswork.
 	 */
-	x = spl5();
-	addr->acc_icsr = ACC_RESET;
-	DELAY(100);
-        addr->acc_ocsr = ACC_RESET;
-	DELAY(1000);
-	addr->acc_ocsr = OUT_BBACK;	/* reset host master ready */
-	DELAY(1000);
-	addr->acc_ocsr = 0;
-	addr->acc_icsr = IN_MRDY;	/* close the relay */
-	splx(x);
-
-	/* 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);	/* ??? */
+        addr->ocsr = ACC_RESET; DELAY(5000);
+	addr->ocsr = OUT_BBACK;	DELAY(5000);	/* reset host master ready */
+	addr->ocsr = 0;
+	if (accinputreset(addr, unit) == 0) {
+		ui->ui_alive = 0;
+		return (0);
 	}
 
 	/*
 	 * 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: IMPMTU includes the leader.
 	 */
-	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 = -(IMPMTU >> 1);
+#ifdef LOOPBACK
+	addr->ocsr |= OUT_BBACK;
+#endif
+	addr->icsr = 
 		IN_MRDY | ACC_IE | IN_WEN | ((info & 0x30000) >> 12) | ACC_GO;
-	splx(x);
+	return (1);
+}
+
+accinputreset(addr, unit)
+	register struct accdevice *addr;
+	register int unit;
+{
+	register int i;
+
+	addr->icsr = ACC_RESET; DELAY(5000);
+	addr->icsr = IN_MRDY | IN_WEN;		/* close the relay */
+	DELAY(10000);
+	/* YECH!!! */
+	for (i = 0; i < 500; i++) {
+		if ((addr->icsr & IN_HRDY) ||
+		    (addr->icsr & (IN_RMR | IN_IMPBSY)) == 0)
+			return (1);
+		addr->icsr = IN_MRDY | IN_WEN; DELAY(10000);
+		/* keep turning IN_RMR off */
+	}
+	printf("acc%d: imp doesn't respond, icsr=%b\n", unit,
+		addr->icsr, ACC_INBITS);
+	return (0);
 }
 
 /*
@@ -202,13 +233,11 @@ accstart(dev)
 	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;
 	u_short cmd;
 
-COUNT(ACCSTART);
 	if (sc->acc_ic->ic_oactive)
 		goto restart;
 	
@@ -226,16 +255,20 @@ COUNT(ACCSTART);
 
 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;
-	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;
-	addr->acc_ocsr = cmd;
+#ifdef LOOPBACK
+	cmd |= OUT_BBACK;
+#endif
+	addr->ocsr = cmd;
 	sc->acc_ic->ic_oactive = 1;
 }
 
@@ -243,66 +276,69 @@ restart:
  * Output interrupt handler.
  */
 accxint(unit)
+	int unit;
 {
-	register struct uba_device *ui = accinfo[unit];
 	register struct acc_softc *sc = &acc_softc[unit];
 	register struct accdevice *addr;
 
-COUNT(ACCXINT);
+	addr = (struct accdevice *)accinfo[unit]->ui_addr;
 	if (sc->acc_ic->ic_oactive == 0) {
-		printf("acc%d: stray send interrupt\n", unit);
+		printf("acc%d: stray xmit interrupt, csr=%b\n", unit,
+			addr->ocsr, ACC_OUTBITS);
 		return;
 	}
-	addr = (struct accdevice *)ui->ui_addr;
 	sc->acc_if->if_opackets++;
 	sc->acc_ic->ic_oactive = 0;
-	if (addr->acc_ocsr & ACC_ERR) {
-		printf("acc%d: send error, csr=%b\n", unit,
-			addr->acc_ocsr, ACC_OUTBITS);
+	if (addr->ocsr & ACC_ERR) {
+		printf("acc%d: output error, ocsr=%b, icsr=%b\n", unit,
+			addr->ocsr, ACC_OUTBITS, addr->icsr, ACC_INBITS);
 		sc->acc_if->if_oerrors++;
 	}
-	if (sc->acc_if->if_snd.ifq_head == 0) {
-		if (sc->acc_ifuba.ifu_xtofree) {
-			m_freem(sc->acc_ifuba.ifu_xtofree);
-			sc->acc_ifuba.ifu_xtofree = 0;
-		}
-		return;
+	if (sc->acc_ifuba.ifu_xtofree) {
+		m_freem(sc->acc_ifuba.ifu_xtofree);
+		sc->acc_ifuba.ifu_xtofree = 0;
 	}
-	accstart(unit);
+	if (sc->acc_if->if_snd.ifq_head)
+		accstart(unit);
 }
 
 /*
  * Input interrupt handler
  */
 accrint(unit)
+	int unit;
 {
 	register struct acc_softc *sc = &acc_softc[unit];
 	register struct accdevice *addr;
-	register struct ifqueue *inq;
     	struct mbuf *m;
 	int len, info;
 
-COUNT(ACCRINT);
+	addr = (struct accdevice *)accinfo[unit]->ui_addr;
 	sc->acc_if->if_ipackets++;
 
 	/*
 	 * Purge BDP; flush message if error indicated.
 	 */
-	UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_r.ifrw_bdp);
-	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 (sc->acc_ifuba.ifu_flags & UBA_NEEDBDP)
+		UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_r.ifrw_bdp);
+	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) {
-		if (addr->acc_icsr & IN_EOM)
+		if (addr->icsr & IN_EOM)
 			sc->acc_flush = 0;
 		goto setup;
 	}
-	len = sizeof(struct imp_leader) + (addr->acc_iwc << 1);
+	len = IMPMTU + (addr->iwc << 1);
+	if (len < 0 || len > IMPMTU) {
+		printf("acc%d: bad length=%d\n", len);
+		sc->acc_if->if_ierrors++;
+		goto setup;
+	}
 
 	/*
 	 * The last parameter is always 0 since using
@@ -311,15 +347,13 @@ COUNT(ACCRINT);
 	m = if_rubaget(&sc->acc_ifuba, len, 0);
 	if (m == 0)
 		goto setup;
-	if ((addr->acc_icsr & IN_EOM) == 0) {
+	if ((addr->icsr & IN_EOM) == 0) {
 		if (sc->acc_iq)
 			m_cat(sc->acc_iq, m);
 		else
 			sc->acc_iq = m;
 		goto setup;
 	}
-	/* adjust message length for padding. */
-	m->m_len -= 2;
 	if (sc->acc_iq) {
 		m_cat(sc->acc_iq, m);
 		m = sc->acc_iq;
@@ -332,9 +366,9 @@ setup:
 	 * 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 = -(IMPMTU >> 1);
+	addr->icsr =
 		IN_MRDY | ACC_IE | IN_WEN | ((info & 0x30000) >> 12) | ACC_GO;
 }
 #endif