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

/*	if_acc.c	4.17	82/06/14	*/

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

/*
 * ACC LH/DH ARPAnet IMP interface driver.
 */

#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/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"

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 };
#define	ACCUNIT(x)	minor(x)

int	accinit(), accstart(), 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	ifnet *acc_if;		/* pointer to IMP's ifnet struct */
	struct	impcb *acc_ic;		/* 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];

#define	NACCDEBUG	10000
char	accdebug[NACCDEBUG];
int	accdebugx;

/*
 * 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;

COUNT(ACCPROBE);
#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;
#ifdef ECHACK
	br = 0x16;
#endif
	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)
	struct uba_device *ui;
{
	register struct acc_softc *sc = &acc_softc[ui->ui_unit];
	register struct impcb *ip;
	struct ifimpcb {
		struct	ifnet ifimp_if;
		struct	impcb ifimp_impcb;
	} *ifimp;

COUNT(ACCATTACH);
	if ((ifimp = (struct ifimpcb *)impattach(ui)) == 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
}

/*
 * 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;

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];
	/* 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 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, i;

COUNT(ACCINIT);
	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);
		ui->ui_alive = 0;
		return (0);
	}
	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: IMPMTU includes the leader.
	 */
	acctrace("init", addr->icsr);
	info = sc->acc_ifuba.ifu_r.ifrw_info;
	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;
	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);
}

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

COUNT(ACCSTART);
	acctrace("start", sc->acc_ic->ic_oactive);
	if (sc->acc_ic->ic_oactive)
		goto restart;
	
	/*
	 * Not already active, deqeue a request and
	 * map it onto the UNIBUS.  If no more
	 * requeusts, just return.
	 */
	IF_DEQUEUE(&sc->acc_if->if_snd, m);
	if (m == 0) {
		acctrace("q empty", 0);
		sc->acc_ic->ic_oactive = 0;
		return;
	}
	sc->acc_olen = if_wubaput(&sc->acc_ifuba, m);

restart:
	/*
	 * 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_ic->ic_oactive = 1;
}

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

COUNT(ACCXINT);
	acctrace("xint", sc->acc_ic->ic_oactive);
	addr = (struct accdevice *)accinfo[unit]->ui_addr;
	if (sc->acc_ic->ic_oactive == 0) {
		printf("acc%d: stray xmit interrupt, csr=%b\n", unit,
			addr->ocsr, ACC_OUTBITS);
		return;
	}
	acctrace("ocsr", addr->ocsr);
	sc->acc_if->if_opackets++;
	sc->acc_ic->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_if->if_oerrors++;
	}
	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 == 0) {
		addr->ocsr &= ~ACC_IE;		/* hardware funky? */
		return;
	}
	accstart(unit);
}

/*
 * Input interrupt handler
 */
accrint(unit)
{
	register struct acc_softc *sc = &acc_softc[unit];
	register struct accdevice *addr;
    	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.
	 */
	if (sc->acc_ifuba.ifu_flags & UBA_NEEDBDP)
		UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_r.ifrw_bdp);
	acctrace("rint", addr->icsr);
	if (addr->icsr & ACC_ERR) {
		printf("acc%d: input error, icsr=%b, ocsr=%b\n", unit,
		    addr->icsr, ACC_INBITS, addr->ocsr, ACC_OUTBITS);
		sc->acc_if->if_ierrors++;
		sc->acc_flush = 1;
	}

	acctrace("flush", sc->acc_flush);
	if (sc->acc_flush) {
		if (addr->icsr & IN_EOM)
			sc->acc_flush = 0;
		goto setup;
	}
	len = IMPMTU + (addr->iwc << 1);
	acctrace("length", len);
	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
	 * trailers on the ARPAnet is insane.
	 */
	m = if_rubaget(&sc->acc_ifuba, len, 0);
	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;
	}
	acctrace("impinput", 0);
	impinput(unit, m);

setup:
	/*
	 * Setup for next message.
	 */
	info = sc->acc_ifuba.ifu_r.ifrw_info;
	addr->iba = (u_short)info;
	addr->iwc = -(IMPMTU >> 1);
	addr->icsr =
		IN_MRDY | ACC_IE | IN_WEN | ((info & 0x30000) >> 12) | ACC_GO;
}

int	accprintf = 0;

acctrace(cmd, value)
	char *cmd;
	int value;
{
	register int i;
	register char *p = (char *)&value;

	if (accprintf)
		printf("%s: %x", cmd, value);
	do {
		if (accdebugx >= NACCDEBUG)
			accdebugx = 0;
		accdebug[accdebugx++] = *cmd;
	} while (*cmd++);
	for (i = 0; i < sizeof (int); i++) {
		if (accdebugx >= NACCDEBUG)
			accdebugx = 0;
		accdebug[accdebugx++] = *p++;
	}
}
#endif
Commit	Line	Data
7dd4b7cb	1	/* if_acc.c 4.17 82/06/14 */
28081cf8 SL	2
	3	#include "acc.h"
	4	#ifdef NACC > 0
	5
	6	/*
	7	* ACC LH/DH ARPAnet IMP interface driver.
	8	*/
	9
	10	#include "../h/param.h"
	11	#include "../h/systm.h"
	12	#include "../h/mbuf.h"
	13	#include "../h/pte.h"
	14	#include "../h/buf.h"
	15	#include "../h/protosw.h"
	16	#include "../h/socket.h"
	17	#include "../h/ubareg.h"
	18	#include "../h/ubavar.h"
28081cf8 SL	19	#include "../h/cpu.h"
	20	#include "../h/mtpr.h"
	21	#include "../h/vmmac.h"
	22	#include "../net/in.h"
	23	#include "../net/in_systm.h"
	24	#include "../net/if.h"
a2cd4df7	25	#include "../net/if_acc.h"
28081cf8 SL	26	#include "../net/if_imp.h"
	27	#include "../net/if_uba.h"
	28
	29	int accprobe(), accattach(), accrint(), accxint();
	30	struct uba_device *accinfo[NACC];
	31	u_short accstd[] = { 0 };
	32	struct uba_driver accdriver =
	33	{ accprobe, 0, accattach, 0, accstd, "acc", accinfo };
	34	#define ACCUNIT(x) minor(x)
	35
	36	int accinit(), accstart(), accreset();
	37
	38	/*
	39	* "Lower half" of IMP interface driver.
	40	*
	41	* Each IMP interface is handled by a common module which handles
	42	* the IMP-host protocol and a hardware driver which manages the
	43	* hardware specific details of talking with the IMP.
	44	*
	45	* The hardware portion of the IMP driver handles DMA and related
	46	* management of UNIBUS resources. The IMP protocol module interprets
	47	* contents of these messages and "controls" the actions of the
	48	* hardware module during IMP resets, but not, for instance, during
	49	* UNIBUS resets.
	50	*
	51	* The two modules are coupled at "attach time", and ever after,
	52	* through the imp interface structure. Higher level protocols,
	53	* e.g. IP, interact with the IMP driver, rather than the ACC.
	54	*/
	55	struct acc_softc {
	56	struct ifnet acc_if; / pointer to IMP's ifnet struct */
	57	struct impcb acc_ic; / data structure shared with IMP */
	58	struct ifuba acc_ifuba; /* UNIBUS resources */
	59	struct mbuf acc_iq; / input reassembly queue */
	60	short acc_olen; /* size of last message sent */
	61	char acc_flush; /* flush remainder of message */
28081cf8 SL	62	} acc_softc[NACC];
28081cf8 SL	63
7dfb87a5 SL	64	#define NACCDEBUG 10000
	65	char accdebug[NACCDEBUG];
	66	int accdebugx;
	67
28081cf8 SL	68	/*
	69	* Reset the IMP and cause a transmitter interrupt by
	70	* performing a null DMA.
	71	*/
	72	accprobe(reg)
	73	caddr_t reg;
	74	{
	75	register int br, cvec; /* r11, r10 value-result */
	76	register struct accdevice addr = (struct accdevice )reg;
	77
	78	COUNT(ACCPROBE);
	79	#ifdef lint
	80	br = 0; cvec = br; br = cvec;
	81	accrint(0); accxint(0);
	82	#endif
a2cd4df7 BJ	83	addr->icsr = ACC_RESET; DELAY(5000);
	84	addr->ocsr = ACC_RESET; DELAY(5000);
	85	addr->ocsr = OUT_BBACK; DELAY(5000);
	86	addr->owc = 0;
	87	addr->ocsr = ACC_IE \| ACC_GO; DELAY(5000);
7dd4b7cb	88	addr->ocsr = 0;
a2cd4df7	89	if (cvec && cvec != 0x200) /* transmit -> receive */
28081cf8	90	cvec -= 4;
7d6f1cd5 SL	91	#ifdef ECHACK
	92	br = 0x16;
	93	#endif
28081cf8 SL	94	return (1);
	95	}
	96
	97	/*
	98	* Call the IMP module to allow it to set up its internal
	99	* state, then tie the two modules together by setting up
	100	* the back pointers to common data structures.
	101	*/
	102	accattach(ui)
	103	struct uba_device *ui;
	104	{
	105	register struct acc_softc *sc = &acc_softc[ui->ui_unit];
	106	register struct impcb *ip;
	107	struct ifimpcb {
	108	struct ifnet ifimp_if;
	109	struct impcb ifimp_impcb;
	110	} *ifimp;
	111
	112	COUNT(ACCATTACH);
	113	if ((ifimp = (struct ifimpcb *)impattach(ui)) == 0)
a2cd4df7	114	panic("accattach");
28081cf8 SL	115	sc->acc_if = &ifimp->ifimp_if;
	116	ip = &ifimp->ifimp_impcb;
	117	sc->acc_ic = ip;
	118	ip->ic_init = accinit;
	119	ip->ic_start = accstart;
7dfb87a5	120	sc->acc_ifuba.ifu_flags = UBA_CANTWAIT;
a2cd4df7	121	#ifdef notdef
7dfb87a5	122	sc->acc_ifuba.ifu_flags \|= UBA_NEEDBDP;
a2cd4df7	123	#endif
28081cf8 SL	124	}
	125
	126	/*
	127	* Reset interface after UNIBUS reset.
	128	* If interface is on specified uba, reset its state.
	129	*/
	130	accreset(unit, uban)
	131	int unit, uban;
	132	{
	133	register struct uba_device *ui;
	134	struct acc_softc *sc;
	135
	136	COUNT(ACCRESET);
	137	if (unit >= NACC \|\| (ui = accinfo[unit]) == 0 \|\| ui->ui_alive == 0 \|\|
	138	ui->ui_ubanum != uban)
	139	return;
	140	printf(" acc%d", unit);
	141	sc = &acc_softc[unit];
	142	/* must go through IMP to allow it to set state */
	143	(*sc->acc_if->if_init)(unit);
	144	}
	145
	146	/*
	147	* Initialize interface: clear recorded pending operations,
a2cd4df7 BJ	148	* and retrieve, and initialize UNIBUS resources. Note
	149	* return value is used by IMP init routine to mark IMP
	150	* unavailable for outgoing traffic.
28081cf8 SL	151	*/
	152	accinit(unit)
	153	int unit;
	154	{
a2cd4df7 BJ	155	register struct acc_softc *sc;
a2cd4df7 BJ	156	register struct uba_device *ui;
28081cf8	157	register struct accdevice *addr;
521c9128	158	int info, i;
28081cf8 SL	159
28081cf8 SL	160	COUNT(ACCINIT);
a2cd4df7 BJ	161	if (unit >= NACC \|\| (ui = accinfo[unit]) == 0 \|\| ui->ui_alive == 0) {
	162	printf("acc%d: not alive\n", unit);
	163	return (0);
	164	}
	165	sc = &acc_softc[unit];
	166	/*
	167	* Header length is 0 since we have to passs
	168	* the IMP leader up to the protocol interpretation
	169	* routines. If we had the header length as
	170	* sizeof(struct imp_leader), then the if_ routines
	171	* would asssume we handle it on input and output.
	172	*/
668cc26d	173	if (if_ubainit(&sc->acc_ifuba, ui->ui_ubanum, 0,
e431883e	174	(int)btoc(IMPMTU)) == 0) {
28081cf8	175	printf("acc%d: can't initialize\n", unit);
7dfb87a5 SL	176	ui->ui_alive = 0;
7dfb87a5 SL	177	return (0);
28081cf8 SL	178	}
	179	addr = (struct accdevice *)ui->ui_addr;
	180
a0b7c7fb	181	/*
a2cd4df7 BJ	182	* Reset the imp interface;
a2cd4df7 BJ	183	* the delays are pure guesswork.
a0b7c7fb	184	*/
a2cd4df7	185	addr->ocsr = ACC_RESET; DELAY(5000);
8129679e	186	addr->ocsr = OUT_BBACK; DELAY(5000); /* reset host master ready */
a2cd4df7	187	addr->ocsr = 0;
7dfb87a5 SL	188	if (accinputreset(addr, unit) == 0) {
	189	ui->ui_alive = 0;
	190	return (0);
a2cd4df7	191	}
28081cf8 SL	192
	193	/*
	194	* Put up a read. We can't restart any outstanding writes
	195	* until we're back in synch with the IMP (i.e. we've flushed
	196	* the NOOPs it throws at us).
e431883e	197	* Note: IMPMTU includes the leader.
28081cf8	198	*/
7dfb87a5	199	acctrace("init", addr->icsr);
28081cf8	200	info = sc->acc_ifuba.ifu_r.ifrw_info;
a2cd4df7	201	addr->iba = (u_short)info;
e431883e	202	addr->iwc = -(IMPMTU >> 1);
a2cd4df7 BJ	203	#ifdef LOOPBACK
	204	addr->ocsr \|= OUT_BBACK;
	205	#endif
	206	addr->icsr =
28081cf8	207	IN_MRDY \| ACC_IE \| IN_WEN \| ((info & 0x30000) >> 12) \| ACC_GO;
a2cd4df7	208	return (1);
28081cf8 SL	209	}
28081cf8 SL	210
7dfb87a5 SL	211	accinputreset(addr, unit)
	212	register struct accdevice *addr;
	213	register int unit;
	214	{
	215	register int i;
	216
	217	addr->icsr = ACC_RESET; DELAY(5000);
	218	addr->icsr = IN_MRDY \| IN_WEN; /* close the relay */
	219	DELAY(10000);
	220	/* YECH!!! */
	221	for (i = 0; i < 500; i++) {
	222	if ((addr->icsr & IN_HRDY) \|\|
	223	(addr->icsr & (IN_RMR \| IN_IMPBSY)) == 0)
	224	return (1);
	225	addr->icsr = IN_MRDY \| IN_WEN; DELAY(10000);
	226	/* keep turning IN_RMR off */
	227	}
	228	printf("acc%d: imp doesn't respond, icsr=%b\n", unit,
	229	addr->icsr, ACC_INBITS);
	230	return (0);
	231	}
	232
28081cf8 SL	233	/*
	234	* Start output on an interface.
	235	*/
	236	accstart(dev)
	237	dev_t dev;
	238	{
	239	int unit = ACCUNIT(dev), info;
28081cf8 SL	240	register struct acc_softc *sc = &acc_softc[unit];
	241	register struct accdevice *addr;
	242	struct mbuf *m;
	243	u_short cmd;
	244
	245	COUNT(ACCSTART);
7dfb87a5	246	acctrace("start", sc->acc_ic->ic_oactive);
28081cf8 SL	247	if (sc->acc_ic->ic_oactive)
	248	goto restart;
	249
	250	/*
	251	* Not already active, deqeue a request and
	252	* map it onto the UNIBUS. If no more
	253	* requeusts, just return.
	254	*/
	255	IF_DEQUEUE(&sc->acc_if->if_snd, m);
	256	if (m == 0) {
7dfb87a5	257	acctrace("q empty", 0);
28081cf8 SL	258	sc->acc_ic->ic_oactive = 0;
	259	return;
	260	}
	261	sc->acc_olen = if_wubaput(&sc->acc_ifuba, m);
	262
	263	restart:
	264	/*
a2cd4df7 BJ	265	* Have request mapped to UNIBUS for
a2cd4df7 BJ	266	* transmission; start the output.
28081cf8	267	*/
a2cd4df7 BJ	268	if (sc->acc_ifuba.ifu_flags & UBA_NEEDBDP)
a2cd4df7 BJ	269	UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_w.ifrw_bdp);
bcb5db7d	270	addr = (struct accdevice *)accinfo[unit]->ui_addr;
28081cf8	271	info = sc->acc_ifuba.ifu_w.ifrw_info;
a2cd4df7 BJ	272	addr->oba = (u_short)info;
a2cd4df7 BJ	273	addr->owc = -((sc->acc_olen + 1) >> 1);
28081cf8	274	cmd = ACC_IE \| OUT_ENLB \| ((info & 0x30000) >> 12) \| ACC_GO;
a2cd4df7 BJ	275	#ifdef LOOPBACK
	276	cmd \|= OUT_BBACK;
	277	#endif
	278	addr->ocsr = cmd;
28081cf8 SL	279	sc->acc_ic->ic_oactive = 1;
	280	}
	281
	282	/*
	283	* Output interrupt handler.
	284	*/
	285	accxint(unit)
	286	{
28081cf8 SL	287	register struct acc_softc *sc = &acc_softc[unit];
	288	register struct accdevice *addr;
	289
	290	COUNT(ACCXINT);
7dfb87a5 SL	291	acctrace("xint", sc->acc_ic->ic_oactive);
7dfb87a5 SL	292	addr = (struct accdevice *)accinfo[unit]->ui_addr;
28081cf8	293	if (sc->acc_ic->ic_oactive == 0) {
7dfb87a5 SL	294	printf("acc%d: stray xmit interrupt, csr=%b\n", unit,
7dfb87a5 SL	295	addr->ocsr, ACC_OUTBITS);
28081cf8 SL	296	return;
28081cf8 SL	297	}
7dfb87a5	298	acctrace("ocsr", addr->ocsr);
28081cf8 SL	299	sc->acc_if->if_opackets++;
28081cf8 SL	300	sc->acc_ic->ic_oactive = 0;
7dd4b7cb	301	if (addr->ocsr & ACC_ERR) {
7dfb87a5 SL	302	printf("acc%d: output error, ocsr=%b, icsr=%b\n", unit,
7dfb87a5 SL	303	addr->ocsr, ACC_OUTBITS, addr->icsr, ACC_INBITS);
28081cf8	304	sc->acc_if->if_oerrors++;
a0b7c7fb	305	}
a2cd4df7 BJ	306	if (sc->acc_ifuba.ifu_xtofree) {
	307	m_freem(sc->acc_ifuba.ifu_xtofree);
	308	sc->acc_ifuba.ifu_xtofree = 0;
28081cf8	309	}
7dd4b7cb BJ	310	if (sc->acc_if->if_snd.ifq_head == 0) {
	311	addr->ocsr &= ~ACC_IE; /* hardware funky? */
	312	return;
	313	}
	314	accstart(unit);
28081cf8 SL	315	}
	316
	317	/*
	318	* Input interrupt handler
	319	*/
	320	accrint(unit)
	321	{
	322	register struct acc_softc *sc = &acc_softc[unit];
	323	register struct accdevice *addr;
28081cf8 SL	324	struct mbuf *m;
	325	int len, info;
	326
	327	COUNT(ACCRINT);
7dfb87a5	328	addr = (struct accdevice *)accinfo[unit]->ui_addr;
28081cf8 SL	329	sc->acc_if->if_ipackets++;
	330
	331	/*
	332	* Purge BDP; flush message if error indicated.
	333	*/
a2cd4df7 BJ	334	if (sc->acc_ifuba.ifu_flags & UBA_NEEDBDP)
a2cd4df7 BJ	335	UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_r.ifrw_bdp);
7dfb87a5	336	acctrace("rint", addr->icsr);
7dd4b7cb	337	if (addr->icsr & ACC_ERR) {
7dfb87a5 SL	338	printf("acc%d: input error, icsr=%b, ocsr=%b\n", unit,
7dfb87a5 SL	339	addr->icsr, ACC_INBITS, addr->ocsr, ACC_OUTBITS);
28081cf8 SL	340	sc->acc_if->if_ierrors++;
	341	sc->acc_flush = 1;
	342	}
	343
7dfb87a5	344	acctrace("flush", sc->acc_flush);
28081cf8	345	if (sc->acc_flush) {
a2cd4df7	346	if (addr->icsr & IN_EOM)
28081cf8 SL	347	sc->acc_flush = 0;
	348	goto setup;
	349	}
e431883e	350	len = IMPMTU + (addr->iwc << 1);
7dfb87a5	351	acctrace("length", len);
e431883e	352	if (len < 0 \|\| len > IMPMTU) {
a2cd4df7 BJ	353	printf("acc%d: bad length=%d\n", len);
	354	sc->acc_if->if_ierrors++;
	355	goto setup;
	356	}
28081cf8 SL	357
	358	/*
	359	* The last parameter is always 0 since using
	360	* trailers on the ARPAnet is insane.
	361	*/
	362	m = if_rubaget(&sc->acc_ifuba, len, 0);
	363	if (m == 0)
	364	goto setup;
a2cd4df7	365	if ((addr->icsr & IN_EOM) == 0) {
a0b7c7fb	366	if (sc->acc_iq)
28081cf8	367	m_cat(sc->acc_iq, m);
a0b7c7fb	368	else
28081cf8	369	sc->acc_iq = m;
28081cf8 SL	370	goto setup;
28081cf8 SL	371	}
a0b7c7fb	372	if (sc->acc_iq) {
28081cf8 SL	373	m_cat(sc->acc_iq, m);
	374	m = sc->acc_iq;
	375	sc->acc_iq = 0;
28081cf8	376	}
7dfb87a5	377	acctrace("impinput", 0);
28081cf8 SL	378	impinput(unit, m);
	379
	380	setup:
	381	/*
	382	* Setup for next message.
	383	*/
	384	info = sc->acc_ifuba.ifu_r.ifrw_info;
a2cd4df7	385	addr->iba = (u_short)info;
e431883e	386	addr->iwc = -(IMPMTU >> 1);
a2cd4df7	387	addr->icsr =
28081cf8 SL	388	IN_MRDY \| ACC_IE \| IN_WEN \| ((info & 0x30000) >> 12) \| ACC_GO;
28081cf8 SL	389	}
7dfb87a5 SL	390
	391	int accprintf = 0;
	392
	393	acctrace(cmd, value)
	394	char *cmd;
	395	int value;
	396	{
	397	register int i;
	398	register char p = (char )&value;
	399
	400	if (accprintf)
	401	printf("%s: %x", cmd, value);
	402	do {
	403	if (accdebugx >= NACCDEBUG)
	404	accdebugx = 0;
	405	accdebug[accdebugx++] = *cmd;
	406	} while (*cmd++);
	407	for (i = 0; i < sizeof (int); i++) {
	408	if (accdebugx >= NACCDEBUG)
	409	accdebugx = 0;
	410	accdebug[accdebugx++] = *p++;
	411	}
	412	}
28081cf8	413	#endif