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

/*
 * Copyright (c) 1982,1986,1988 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that this notice is preserved and that due credit is given
 * to the University of California at Berkeley. The name of the University
 * may not be used to endorse or promote products derived from this
 * software without specific prior written permission. This software
 * is provided ``as is'' without express or implied warranty.
 *
 *	@(#)if_acc.c	7.4 (Berkeley) %G%
 */

#include "acc.h"
#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 "../net/if.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];
u_short accstd[] = { 0 };
struct  uba_driver accdriver =
	{ accprobe, 0, accattach, 0, accstd, "acc", accinfo };

int	accinit(), accoutput(), accdown(), accreset();

/*
 * "Lower half" of IMP interface driver.
 *
 * Each IMP interface is handled by a common module which handles
 * the IMP-host protocol and a hardware driver which manages the
 * hardware specific details of talking with the IMP.
 *
 * The hardware portion of the IMP driver handles DMA and related
 * management of UNIBUS resources.  The IMP protocol module interprets
 * contents of these messages and "controls" the actions of the
 * hardware module during IMP resets, but not, for instance, during
 * UNIBUS resets.
 *
 * The two modules are coupled at "attach time", and ever after,
 * through the imp interface structure.  Higher level protocols,
 * e.g. IP, interact with the IMP driver, rather than the ACC.
 */
struct	acc_softc {
	struct	imp_softc *acc_imp;	/* data structure shared with IMP */
	struct	ifuba acc_ifuba;	/* UNIBUS resources */
	struct	mbuf *acc_iq;		/* input reassembly queue */
	short	acc_olen;		/* size of last message sent */
	char	acc_flush;		/* flush remainder of message */
} acc_softc[NACC];

/*
 * Reset the IMP and cause a transmitter interrupt by
 * performing a null DMA.
 */
accprobe(reg)
	caddr_t reg;
{
	register int br, cvec;		/* r11, r10 value-result */
	register struct accdevice *addr = (struct accdevice *)reg;

#ifdef lint
	br = 0; cvec = br; br = cvec;
	accrint(0); accxint(0);
#endif
	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);
}

/*
 * Call the IMP module to allow it to set up its internal
 * state, then tie the two modules together by setting up
 * the back pointers to common data structures.
 */
accattach(ui)
	register struct uba_device *ui;
{
	register struct acc_softc *sc = &acc_softc[ui->ui_unit];
	register struct impcb *ip;

	if ((sc->acc_imp = impattach(ui->ui_driver->ud_dname, ui->ui_unit,
	    accreset)) == 0)
		return;
	ip = &sc->acc_imp->imp_cb;
	ip->ic_init = accinit;
	ip->ic_output = accoutput;
	ip->ic_down = accdown;
	sc->acc_ifuba.ifu_flags = UBA_CANTWAIT;
#ifdef notdef
	sc->acc_ifuba.ifu_flags |= UBA_NEEDBDP;
#endif
}

/*
 * Reset interface after UNIBUS reset.
 * If interface is on specified uba, reset its state.
 */
accreset(unit, uban)
	int unit, uban;
{
	register struct uba_device *ui;
	struct acc_softc *sc;

	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_imp->imp_if.if_flags &= ~IFF_RUNNING;
	accoflush(unit);
	/* must go through IMP to allow it to set state */
	(*sc->acc_imp->imp_if.if_init)(sc->acc_imp->imp_if.if_unit);
}

/*
 * Initialize interface: clear recorded pending operations,
 * 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;
	register struct uba_device *ui;
	register struct accdevice *addr;
	int info;

	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 ((sc->acc_imp->imp_if.if_flags & IFF_RUNNING) == 0 &&
	    if_ubainit(&sc->acc_ifuba, ui->ui_ubanum, 0,
	     (int)btoc(IMP_RCVBUF)) == 0) {
		printf("acc%d: can't initialize\n", unit);
		sc->acc_imp->imp_if.if_flags &= ~(IFF_UP | IFF_RUNNING);
		return (0);
	}
	sc->acc_imp->imp_if.if_flags |= IFF_RUNNING;
	addr = (struct accdevice *)ui->ui_addr;

	/*
	 * Reset the imp interface;
	 * the delays are pure guesswork.
	 */
        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: IMP_RCVBUF includes the leader.
	 */
	info = sc->acc_ifuba.ifu_r.ifrw_info;
	addr->iba = (u_short)info;
	addr->iwc = -((IMP_RCVBUF) >> 1);
#ifdef LOOPBACK
	addr->ocsr |= OUT_BBACK;
#endif
	addr->icsr = 
		IN_MRDY | ACC_IE | IN_WEN | ((info & 0x30000) >> 12) | ACC_GO;
	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);
}

/*
 * Drop the host ready line to mark host down.
 */
accdown(unit)
	int unit;
{
	register struct accdevice *addr;

	addr = (struct accdevice *)(accinfo[unit]->ui_addr);
        addr->ocsr = ACC_RESET;
	DELAY(5000);
	addr->ocsr = OUT_BBACK;		/* reset host master ready */
	accoflush(unit);
	return (1);
}

accoflush(unit)
	int unit;
{
	register struct acc_softc *sc = &acc_softc[unit];

	sc->acc_imp->imp_cb.ic_oactive = 0;
	if (sc->acc_ifuba.ifu_xtofree) {
		m_freem(sc->acc_ifuba.ifu_xtofree);
		sc->acc_ifuba.ifu_xtofree = 0;
	}
}

/*
 * Start output on an interface.
 */
accoutput(unit, m)
	int unit;
	struct mbuf *m;
{
	int info;
	register struct acc_softc *sc = &acc_softc[unit];
	register struct accdevice *addr;
	u_short cmd;

	sc->acc_olen = if_wubaput(&sc->acc_ifuba, m);
	/*
	 * Have request mapped to UNIBUS for
	 * transmission; start the output.
	 */
	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->oba = (u_short)info;
	addr->owc = -((sc->acc_olen + 1) >> 1);
	cmd = ACC_IE | OUT_ENLB | ((info & 0x30000) >> 12) | ACC_GO;
#ifdef LOOPBACK
	cmd |= OUT_BBACK;
#endif
	addr->ocsr = cmd;
	sc->acc_imp->imp_cb.ic_oactive = 1;
}

/*
 * Output interrupt handler.
 */
accxint(unit)
	int unit;
{
	register struct acc_softc *sc = &acc_softc[unit];
	register struct accdevice *addr;

	addr = (struct accdevice *)accinfo[unit]->ui_addr;
	if (sc->acc_imp->imp_cb.ic_oactive == 0) {
		printf("acc%d: stray xmit interrupt, csr=%b\n", unit,
			addr->ocsr, ACC_OUTBITS);
		return;
	}
	sc->acc_imp->imp_if.if_opackets++;
	sc->acc_imp->imp_cb.ic_oactive = 0;
	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_imp->imp_if.if_oerrors++;
	}
	if (sc->acc_ifuba.ifu_xtofree) {
		m_freem(sc->acc_ifuba.ifu_xtofree);
		sc->acc_ifuba.ifu_xtofree = 0;
	}
	impstart(sc->acc_imp);
}

/*
 * Input interrupt handler
 */
accrint(unit)
	int unit;
{
	register struct acc_softc *sc = &acc_softc[unit];
	register struct accdevice *addr;
    	struct mbuf *m;
	int len, info;

	addr = (struct accdevice *)accinfo[unit]->ui_addr;
	sc->acc_imp->imp_if.if_ipackets++;

	/*
	 * Purge BDP; flush message if error indicated.
	 */
	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_imp->imp_if.if_ierrors++;
		sc->acc_flush = 1;
	}

	if (sc->acc_flush) {
		if (addr->icsr & IN_EOM)
			sc->acc_flush = 0;
		goto setup;
	}
	len = IMP_RCVBUF + (addr->iwc << 1);
	if (len < 0 || len > IMP_RCVBUF) {
		printf("acc%d: bad length=%d\n", unit, len);
		sc->acc_imp->imp_if.if_ierrors++;
		goto setup;
	}

	/*
	 * The offset parameter is always 0 since using
	 * trailers on the ARPAnet is insane.
	 */
	m = if_rubaget(&sc->acc_ifuba, len, 0, &sc->acc_imp->imp_if);
	if (m == 0)
		goto setup;
	if ((addr->icsr & IN_EOM) == 0) {
		if (sc->acc_iq)
			m_cat(sc->acc_iq, m);
		else
			sc->acc_iq = m;
		goto setup;
	}
	if (sc->acc_iq) {
		m_cat(sc->acc_iq, m);
		m = sc->acc_iq;
		sc->acc_iq = 0;
	}
	impinput(unit, m);

setup:
	/*
	 * Setup for next message.
	 */
	info = sc->acc_ifuba.ifu_r.ifrw_info;
	addr->iba = (u_short)info;
	addr->iwc = -((IMP_RCVBUF)>> 1);
	addr->icsr =
		IN_MRDY | ACC_IE | IN_WEN | ((info & 0x30000) >> 12) | ACC_GO;
}
#endif
Commit	Line	Data
da7c5cc6	1	/*
360a9d4e MK	2	* Copyright (c) 1982,1986,1988 Regents of the University of California.
360a9d4e MK	3	* All rights reserved.
da7c5cc6	4	*
360a9d4e MK	5	* Redistribution and use in source and binary forms are permitted
	6	* provided that this notice is preserved and that due credit is given
	7	* to the University of California at Berkeley. The name of the University
	8	* may not be used to endorse or promote products derived from this
	9	* software without specific prior written permission. This software
	10	* is provided ``as is'' without express or implied warranty.
	11	*
35718d8f	12	* @(#)if_acc.c 7.4 (Berkeley) %G%
da7c5cc6	13	*/
28081cf8 SL	14
28081cf8 SL	15	#include "acc.h"
9498ec5c	16	#if NACC > 0
28081cf8 SL	17
	18	/*
	19	* ACC LH/DH ARPAnet IMP interface driver.
	20	*/
961945a8	21	#include "../machine/pte.h"
28081cf8	22
a6e960e7 JB	23	#include "param.h"
	24	#include "systm.h"
	25	#include "mbuf.h"
	26	#include "buf.h"
	27	#include "protosw.h"
	28	#include "socket.h"
	29	#include "vmmac.h"
a9687d27	30
28081cf8	31	#include "../net/if.h"
d2cc167c	32	#include "../netimp/if_imp.h"
a9687d27 BJ	33
	34	#include "../vax/cpu.h"
	35	#include "../vax/mtpr.h"
a6e960e7 JB	36	#include "if_accreg.h"
a6e960e7 JB	37	#include "if_uba.h"
a9687d27 BJ	38	#include "../vaxuba/ubareg.h"
a9687d27 BJ	39	#include "../vaxuba/ubavar.h"
28081cf8 SL	40
	41	int accprobe(), accattach(), accrint(), accxint();
	42	struct uba_device *accinfo[NACC];
	43	u_short accstd[] = { 0 };
	44	struct uba_driver accdriver =
	45	{ accprobe, 0, accattach, 0, accstd, "acc", accinfo };
28081cf8	46
3c238487	47	int accinit(), accoutput(), accdown(), accreset();
28081cf8 SL	48
	49	/*
	50	* "Lower half" of IMP interface driver.
	51	*
	52	* Each IMP interface is handled by a common module which handles
	53	* the IMP-host protocol and a hardware driver which manages the
	54	* hardware specific details of talking with the IMP.
	55	*
	56	* The hardware portion of the IMP driver handles DMA and related
	57	* management of UNIBUS resources. The IMP protocol module interprets
	58	* contents of these messages and "controls" the actions of the
	59	* hardware module during IMP resets, but not, for instance, during
	60	* UNIBUS resets.
	61	*
	62	* The two modules are coupled at "attach time", and ever after,
	63	* through the imp interface structure. Higher level protocols,
	64	* e.g. IP, interact with the IMP driver, rather than the ACC.
	65	*/
	66	struct acc_softc {
3c238487	67	struct imp_softc acc_imp; / data structure shared with IMP */
28081cf8 SL	68	struct ifuba acc_ifuba; /* UNIBUS resources */
	69	struct mbuf acc_iq; / input reassembly queue */
	70	short acc_olen; /* size of last message sent */
	71	char acc_flush; /* flush remainder of message */
28081cf8 SL	72	} acc_softc[NACC];
	73
	74	/*
	75	* Reset the IMP and cause a transmitter interrupt by
	76	* performing a null DMA.
	77	*/
	78	accprobe(reg)
	79	caddr_t reg;
	80	{
	81	register int br, cvec; /* r11, r10 value-result */
	82	register struct accdevice addr = (struct accdevice )reg;
	83
28081cf8 SL	84	#ifdef lint
	85	br = 0; cvec = br; br = cvec;
	86	accrint(0); accxint(0);
	87	#endif
a2cd4df7 BJ	88	addr->icsr = ACC_RESET; DELAY(5000);
	89	addr->ocsr = ACC_RESET; DELAY(5000);
	90	addr->ocsr = OUT_BBACK; DELAY(5000);
	91	addr->owc = 0;
	92	addr->ocsr = ACC_IE \| ACC_GO; DELAY(5000);
7dd4b7cb	93	addr->ocsr = 0;
a2cd4df7	94	if (cvec && cvec != 0x200) /* transmit -> receive */
28081cf8 SL	95	cvec -= 4;
	96	return (1);
	97	}
	98
	99	/*
	100	* Call the IMP module to allow it to set up its internal
	101	* state, then tie the two modules together by setting up
	102	* the back pointers to common data structures.
	103	*/
	104	accattach(ui)
35718d8f	105	register struct uba_device *ui;
28081cf8 SL	106	{
	107	register struct acc_softc *sc = &acc_softc[ui->ui_unit];
	108	register struct impcb *ip;
28081cf8	109
35718d8f MK	110	if ((sc->acc_imp = impattach(ui->ui_driver->ud_dname, ui->ui_unit,
35718d8f MK	111	accreset)) == 0)
fd4d8418	112	return;
3c238487	113	ip = &sc->acc_imp->imp_cb;
28081cf8	114	ip->ic_init = accinit;
3c238487 MK	115	ip->ic_output = accoutput;
3c238487 MK	116	ip->ic_down = accdown;
92aca3da	117	sc->acc_ifuba.ifu_flags = UBA_CANTWAIT;
a2cd4df7	118	#ifdef notdef
7dfb87a5	119	sc->acc_ifuba.ifu_flags \|= UBA_NEEDBDP;
a2cd4df7	120	#endif
28081cf8 SL	121	}
	122
	123	/*
	124	* Reset interface after UNIBUS reset.
	125	* If interface is on specified uba, reset its state.
	126	*/
	127	accreset(unit, uban)
	128	int unit, uban;
	129	{
	130	register struct uba_device *ui;
	131	struct acc_softc *sc;
	132
28081cf8 SL	133	if (unit >= NACC \|\| (ui = accinfo[unit]) == 0 \|\| ui->ui_alive == 0 \|\|
	134	ui->ui_ubanum != uban)
	135	return;
	136	printf(" acc%d", unit);
	137	sc = &acc_softc[unit];
3c238487	138	sc->acc_imp->imp_if.if_flags &= ~IFF_RUNNING;
35718d8f	139	accoflush(unit);
28081cf8	140	/* must go through IMP to allow it to set state */
3c238487	141	(*sc->acc_imp->imp_if.if_init)(sc->acc_imp->imp_if.if_unit);
28081cf8 SL	142	}
	143
	144	/*
	145	* Initialize interface: clear recorded pending operations,
a2cd4df7 BJ	146	* and retrieve, and initialize UNIBUS resources. Note
	147	* return value is used by IMP init routine to mark IMP
	148	* unavailable for outgoing traffic.
28081cf8 SL	149	*/
	150	accinit(unit)
	151	int unit;
	152	{
a2cd4df7 BJ	153	register struct acc_softc *sc;
a2cd4df7 BJ	154	register struct uba_device *ui;
28081cf8	155	register struct accdevice *addr;
7d47e8bb	156	int info;
28081cf8	157
a2cd4df7 BJ	158	if (unit >= NACC \|\| (ui = accinfo[unit]) == 0 \|\| ui->ui_alive == 0) {
	159	printf("acc%d: not alive\n", unit);
	160	return (0);
	161	}
	162	sc = &acc_softc[unit];
	163	/*
	164	* Header length is 0 since we have to passs
	165	* the IMP leader up to the protocol interpretation
	166	* routines. If we had the header length as
	167	* sizeof(struct imp_leader), then the if_ routines
	168	* would asssume we handle it on input and output.
	169	*/
3c238487 MK	170	if ((sc->acc_imp->imp_if.if_flags & IFF_RUNNING) == 0 &&
	171	if_ubainit(&sc->acc_ifuba, ui->ui_ubanum, 0,
	172	(int)btoc(IMP_RCVBUF)) == 0) {
28081cf8	173	printf("acc%d: can't initialize\n", unit);
3c238487	174	sc->acc_imp->imp_if.if_flags &= ~(IFF_UP \| IFF_RUNNING);
7dfb87a5	175	return (0);
28081cf8	176	}
3c238487	177	sc->acc_imp->imp_if.if_flags \|= IFF_RUNNING;
28081cf8 SL	178	addr = (struct accdevice *)ui->ui_addr;
28081cf8 SL	179
a0b7c7fb	180	/*
a2cd4df7 BJ	181	* Reset the imp interface;
a2cd4df7 BJ	182	* the delays are pure guesswork.
a0b7c7fb	183	*/
a2cd4df7	184	addr->ocsr = ACC_RESET; DELAY(5000);
8129679e	185	addr->ocsr = OUT_BBACK; DELAY(5000); /* reset host master ready */
a2cd4df7	186	addr->ocsr = 0;
7dfb87a5 SL	187	if (accinputreset(addr, unit) == 0) {
	188	ui->ui_alive = 0;
	189	return (0);
a2cd4df7	190	}
28081cf8 SL	191
	192	/*
	193	* Put up a read. We can't restart any outstanding writes
	194	* until we're back in synch with the IMP (i.e. we've flushed
	195	* the NOOPs it throws at us).
3c238487	196	* Note: IMP_RCVBUF includes the leader.
28081cf8	197	*/
28081cf8	198	info = sc->acc_ifuba.ifu_r.ifrw_info;
a2cd4df7	199	addr->iba = (u_short)info;
3c238487	200	addr->iwc = -((IMP_RCVBUF) >> 1);
a2cd4df7 BJ	201	#ifdef LOOPBACK
	202	addr->ocsr \|= OUT_BBACK;
	203	#endif
	204	addr->icsr =
28081cf8	205	IN_MRDY \| ACC_IE \| IN_WEN \| ((info & 0x30000) >> 12) \| ACC_GO;
a2cd4df7	206	return (1);
28081cf8 SL	207	}
28081cf8 SL	208
7dfb87a5 SL	209	accinputreset(addr, unit)
	210	register struct accdevice *addr;
	211	register int unit;
	212	{
	213	register int i;
	214
	215	addr->icsr = ACC_RESET; DELAY(5000);
	216	addr->icsr = IN_MRDY \| IN_WEN; /* close the relay */
	217	DELAY(10000);
	218	/* YECH!!! */
	219	for (i = 0; i < 500; i++) {
	220	if ((addr->icsr & IN_HRDY) \|\|
	221	(addr->icsr & (IN_RMR \| IN_IMPBSY)) == 0)
	222	return (1);
	223	addr->icsr = IN_MRDY \| IN_WEN; DELAY(10000);
	224	/* keep turning IN_RMR off */
	225	}
	226	printf("acc%d: imp doesn't respond, icsr=%b\n", unit,
	227	addr->icsr, ACC_INBITS);
	228	return (0);
	229	}
	230
3c238487 MK	231	/*
	232	* Drop the host ready line to mark host down.
	233	*/
	234	accdown(unit)
	235	int unit;
	236	{
	237	register struct accdevice *addr;
	238
	239	addr = (struct accdevice *)(accinfo[unit]->ui_addr);
	240	addr->ocsr = ACC_RESET;
	241	DELAY(5000);
	242	addr->ocsr = OUT_BBACK; /* reset host master ready */
35718d8f	243	accoflush(unit);
3c238487 MK	244	return (1);
	245	}
	246
35718d8f MK	247	accoflush(unit)
	248	int unit;
	249	{
	250	register struct acc_softc *sc = &acc_softc[unit];
	251
	252	sc->acc_imp->imp_cb.ic_oactive = 0;
	253	if (sc->acc_ifuba.ifu_xtofree) {
	254	m_freem(sc->acc_ifuba.ifu_xtofree);
	255	sc->acc_ifuba.ifu_xtofree = 0;
	256	}
	257	}
	258
28081cf8 SL	259	/*
	260	* Start output on an interface.
	261	*/
3c238487 MK	262	accoutput(unit, m)
	263	int unit;
	264	struct mbuf *m;
28081cf8	265	{
3c238487	266	int info;
28081cf8 SL	267	register struct acc_softc *sc = &acc_softc[unit];
28081cf8 SL	268	register struct accdevice *addr;
28081cf8 SL	269	u_short cmd;
28081cf8 SL	270
28081cf8	271	sc->acc_olen = if_wubaput(&sc->acc_ifuba, m);
28081cf8	272	/*
a2cd4df7 BJ	273	* Have request mapped to UNIBUS for
a2cd4df7 BJ	274	* transmission; start the output.
28081cf8	275	*/
a2cd4df7 BJ	276	if (sc->acc_ifuba.ifu_flags & UBA_NEEDBDP)
a2cd4df7 BJ	277	UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_w.ifrw_bdp);
bcb5db7d	278	addr = (struct accdevice *)accinfo[unit]->ui_addr;
28081cf8	279	info = sc->acc_ifuba.ifu_w.ifrw_info;
a2cd4df7 BJ	280	addr->oba = (u_short)info;
a2cd4df7 BJ	281	addr->owc = -((sc->acc_olen + 1) >> 1);
28081cf8	282	cmd = ACC_IE \| OUT_ENLB \| ((info & 0x30000) >> 12) \| ACC_GO;
a2cd4df7 BJ	283	#ifdef LOOPBACK
	284	cmd \|= OUT_BBACK;
	285	#endif
	286	addr->ocsr = cmd;
3c238487	287	sc->acc_imp->imp_cb.ic_oactive = 1;
28081cf8 SL	288	}
	289
	290	/*
	291	* Output interrupt handler.
	292	*/
	293	accxint(unit)
d2cc167c	294	int unit;
28081cf8	295	{
28081cf8 SL	296	register struct acc_softc *sc = &acc_softc[unit];
	297	register struct accdevice *addr;
	298
7dfb87a5	299	addr = (struct accdevice *)accinfo[unit]->ui_addr;
3c238487	300	if (sc->acc_imp->imp_cb.ic_oactive == 0) {
7dfb87a5 SL	301	printf("acc%d: stray xmit interrupt, csr=%b\n", unit,
7dfb87a5 SL	302	addr->ocsr, ACC_OUTBITS);
28081cf8 SL	303	return;
28081cf8 SL	304	}
3c238487 MK	305	sc->acc_imp->imp_if.if_opackets++;
3c238487 MK	306	sc->acc_imp->imp_cb.ic_oactive = 0;
7dd4b7cb	307	if (addr->ocsr & ACC_ERR) {
7dfb87a5 SL	308	printf("acc%d: output error, ocsr=%b, icsr=%b\n", unit,
7dfb87a5 SL	309	addr->ocsr, ACC_OUTBITS, addr->icsr, ACC_INBITS);
3c238487	310	sc->acc_imp->imp_if.if_oerrors++;
a0b7c7fb	311	}
a2cd4df7 BJ	312	if (sc->acc_ifuba.ifu_xtofree) {
	313	m_freem(sc->acc_ifuba.ifu_xtofree);
	314	sc->acc_ifuba.ifu_xtofree = 0;
28081cf8	315	}
3c238487	316	impstart(sc->acc_imp);
28081cf8 SL	317	}
	318
	319	/*
	320	* Input interrupt handler
	321	*/
	322	accrint(unit)
d2cc167c	323	int unit;
28081cf8 SL	324	{
	325	register struct acc_softc *sc = &acc_softc[unit];
	326	register struct accdevice *addr;
28081cf8 SL	327	struct mbuf *m;
	328	int len, info;
	329
7dfb87a5	330	addr = (struct accdevice *)accinfo[unit]->ui_addr;
3c238487	331	sc->acc_imp->imp_if.if_ipackets++;
28081cf8 SL	332
	333	/*
	334	* Purge BDP; flush message if error indicated.
	335	*/
a2cd4df7 BJ	336	if (sc->acc_ifuba.ifu_flags & UBA_NEEDBDP)
a2cd4df7 BJ	337	UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_r.ifrw_bdp);
7dd4b7cb	338	if (addr->icsr & ACC_ERR) {
b690198c SL	339	printf("acc%d: input error, csr=%b\n", unit,
b690198c SL	340	addr->icsr, ACC_INBITS);
3c238487	341	sc->acc_imp->imp_if.if_ierrors++;
28081cf8 SL	342	sc->acc_flush = 1;
	343	}
	344
	345	if (sc->acc_flush) {
a2cd4df7	346	if (addr->icsr & IN_EOM)
28081cf8 SL	347	sc->acc_flush = 0;
	348	goto setup;
	349	}
3c238487 MK	350	len = IMP_RCVBUF + (addr->iwc << 1);
3c238487 MK	351	if (len < 0 \|\| len > IMP_RCVBUF) {
45ee3013	352	printf("acc%d: bad length=%d\n", unit, len);
3c238487	353	sc->acc_imp->imp_if.if_ierrors++;
a2cd4df7 BJ	354	goto setup;
a2cd4df7 BJ	355	}
28081cf8 SL	356
28081cf8 SL	357	/*
fd4d8418	358	* The offset parameter is always 0 since using
28081cf8 SL	359	* trailers on the ARPAnet is insane.
28081cf8 SL	360	*/
3c238487	361	m = if_rubaget(&sc->acc_ifuba, len, 0, &sc->acc_imp->imp_if);
28081cf8 SL	362	if (m == 0)
28081cf8 SL	363	goto setup;
a2cd4df7	364	if ((addr->icsr & IN_EOM) == 0) {
a0b7c7fb	365	if (sc->acc_iq)
28081cf8	366	m_cat(sc->acc_iq, m);
a0b7c7fb	367	else
28081cf8	368	sc->acc_iq = m;
28081cf8 SL	369	goto setup;
28081cf8 SL	370	}
a0b7c7fb	371	if (sc->acc_iq) {
28081cf8 SL	372	m_cat(sc->acc_iq, m);
	373	m = sc->acc_iq;
	374	sc->acc_iq = 0;
28081cf8 SL	375	}
	376	impinput(unit, m);
	377
	378	setup:
	379	/*
	380	* Setup for next message.
	381	*/
	382	info = sc->acc_ifuba.ifu_r.ifrw_info;
a2cd4df7	383	addr->iba = (u_short)info;
3c238487	384	addr->iwc = -((IMP_RCVBUF)>> 1);
a2cd4df7	385	addr->icsr =
28081cf8 SL	386	IN_MRDY \| ACC_IE \| IN_WEN \| ((info & 0x30000) >> 12) \| ACC_GO;
	387	}
	388	#endif