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

/*	if_acc.c	4.18	82/06/15	*/

#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];

/*
 * 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.
	 */
	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);
	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) {
		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);
	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;
	}
	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)
		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);
	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->icsr & IN_EOM)
			sc->acc_flush = 0;
		goto setup;
	}
	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
	 * 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;
	}
	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;
}
#endif
Commit	Line	Data
b690198c	1	/* if_acc.c 4.18 82/06/15 */
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];
	63
	64	/*
	65	* Reset the IMP and cause a transmitter interrupt by
	66	* performing a null DMA.
	67	*/
	68	accprobe(reg)
	69	caddr_t reg;
	70	{
	71	register int br, cvec; /* r11, r10 value-result */
	72	register struct accdevice addr = (struct accdevice )reg;
	73
	74	COUNT(ACCPROBE);
	75	#ifdef lint
	76	br = 0; cvec = br; br = cvec;
	77	accrint(0); accxint(0);
	78	#endif
a2cd4df7 BJ	79	addr->icsr = ACC_RESET; DELAY(5000);
	80	addr->ocsr = ACC_RESET; DELAY(5000);
	81	addr->ocsr = OUT_BBACK; DELAY(5000);
	82	addr->owc = 0;
	83	addr->ocsr = ACC_IE \| ACC_GO; DELAY(5000);
7dd4b7cb	84	addr->ocsr = 0;
a2cd4df7	85	if (cvec && cvec != 0x200) /* transmit -> receive */
28081cf8	86	cvec -= 4;
7d6f1cd5 SL	87	#ifdef ECHACK
	88	br = 0x16;
	89	#endif
28081cf8 SL	90	return (1);
	91	}
	92
	93	/*
	94	* Call the IMP module to allow it to set up its internal
	95	* state, then tie the two modules together by setting up
	96	* the back pointers to common data structures.
	97	*/
	98	accattach(ui)
	99	struct uba_device *ui;
	100	{
	101	register struct acc_softc *sc = &acc_softc[ui->ui_unit];
	102	register struct impcb *ip;
	103	struct ifimpcb {
	104	struct ifnet ifimp_if;
	105	struct impcb ifimp_impcb;
	106	} *ifimp;
	107
	108	COUNT(ACCATTACH);
	109	if ((ifimp = (struct ifimpcb *)impattach(ui)) == 0)
a2cd4df7	110	panic("accattach");
28081cf8 SL	111	sc->acc_if = &ifimp->ifimp_if;
	112	ip = &ifimp->ifimp_impcb;
	113	sc->acc_ic = ip;
	114	ip->ic_init = accinit;
	115	ip->ic_start = accstart;
7dfb87a5	116	sc->acc_ifuba.ifu_flags = UBA_CANTWAIT;
a2cd4df7	117	#ifdef notdef
7dfb87a5	118	sc->acc_ifuba.ifu_flags \|= UBA_NEEDBDP;
a2cd4df7	119	#endif
28081cf8 SL	120	}
	121
	122	/*
	123	* Reset interface after UNIBUS reset.
	124	* If interface is on specified uba, reset its state.
	125	*/
	126	accreset(unit, uban)
	127	int unit, uban;
	128	{
	129	register struct uba_device *ui;
	130	struct acc_softc *sc;
	131
	132	COUNT(ACCRESET);
	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];
	138	/* must go through IMP to allow it to set state */
	139	(*sc->acc_if->if_init)(unit);
	140	}
	141
	142	/*
	143	* Initialize interface: clear recorded pending operations,
a2cd4df7 BJ	144	* and retrieve, and initialize UNIBUS resources. Note
	145	* return value is used by IMP init routine to mark IMP
	146	* unavailable for outgoing traffic.
28081cf8 SL	147	*/
	148	accinit(unit)
	149	int unit;
	150	{
a2cd4df7 BJ	151	register struct acc_softc *sc;
a2cd4df7 BJ	152	register struct uba_device *ui;
28081cf8	153	register struct accdevice *addr;
521c9128	154	int info, i;
28081cf8 SL	155
28081cf8 SL	156	COUNT(ACCINIT);
a2cd4df7 BJ	157	if (unit >= NACC \|\| (ui = accinfo[unit]) == 0 \|\| ui->ui_alive == 0) {
	158	printf("acc%d: not alive\n", unit);
	159	return (0);
	160	}
	161	sc = &acc_softc[unit];
	162	/*
	163	* Header length is 0 since we have to passs
	164	* the IMP leader up to the protocol interpretation
	165	* routines. If we had the header length as
	166	* sizeof(struct imp_leader), then the if_ routines
	167	* would asssume we handle it on input and output.
	168	*/
668cc26d	169	if (if_ubainit(&sc->acc_ifuba, ui->ui_ubanum, 0,
e431883e	170	(int)btoc(IMPMTU)) == 0) {
28081cf8	171	printf("acc%d: can't initialize\n", unit);
7dfb87a5 SL	172	ui->ui_alive = 0;
7dfb87a5 SL	173	return (0);
28081cf8 SL	174	}
	175	addr = (struct accdevice *)ui->ui_addr;
	176
a0b7c7fb	177	/*
a2cd4df7 BJ	178	* Reset the imp interface;
a2cd4df7 BJ	179	* the delays are pure guesswork.
a0b7c7fb	180	*/
a2cd4df7	181	addr->ocsr = ACC_RESET; DELAY(5000);
8129679e	182	addr->ocsr = OUT_BBACK; DELAY(5000); /* reset host master ready */
a2cd4df7	183	addr->ocsr = 0;
7dfb87a5 SL	184	if (accinputreset(addr, unit) == 0) {
	185	ui->ui_alive = 0;
	186	return (0);
a2cd4df7	187	}
28081cf8 SL	188
	189	/*
	190	* Put up a read. We can't restart any outstanding writes
	191	* until we're back in synch with the IMP (i.e. we've flushed
	192	* the NOOPs it throws at us).
e431883e	193	* Note: IMPMTU includes the leader.
28081cf8	194	*/
28081cf8	195	info = sc->acc_ifuba.ifu_r.ifrw_info;
a2cd4df7	196	addr->iba = (u_short)info;
e431883e	197	addr->iwc = -(IMPMTU >> 1);
a2cd4df7 BJ	198	#ifdef LOOPBACK
	199	addr->ocsr \|= OUT_BBACK;
	200	#endif
	201	addr->icsr =
28081cf8	202	IN_MRDY \| ACC_IE \| IN_WEN \| ((info & 0x30000) >> 12) \| ACC_GO;
a2cd4df7	203	return (1);
28081cf8 SL	204	}
28081cf8 SL	205
7dfb87a5 SL	206	accinputreset(addr, unit)
	207	register struct accdevice *addr;
	208	register int unit;
	209	{
	210	register int i;
	211
	212	addr->icsr = ACC_RESET; DELAY(5000);
	213	addr->icsr = IN_MRDY \| IN_WEN; /* close the relay */
	214	DELAY(10000);
	215	/* YECH!!! */
	216	for (i = 0; i < 500; i++) {
	217	if ((addr->icsr & IN_HRDY) \|\|
	218	(addr->icsr & (IN_RMR \| IN_IMPBSY)) == 0)
	219	return (1);
	220	addr->icsr = IN_MRDY \| IN_WEN; DELAY(10000);
	221	/* keep turning IN_RMR off */
	222	}
	223	printf("acc%d: imp doesn't respond, icsr=%b\n", unit,
	224	addr->icsr, ACC_INBITS);
	225	return (0);
	226	}
	227
28081cf8 SL	228	/*
	229	* Start output on an interface.
	230	*/
	231	accstart(dev)
	232	dev_t dev;
	233	{
	234	int unit = ACCUNIT(dev), info;
28081cf8 SL	235	register struct acc_softc *sc = &acc_softc[unit];
	236	register struct accdevice *addr;
	237	struct mbuf *m;
	238	u_short cmd;
	239
	240	COUNT(ACCSTART);
	241	if (sc->acc_ic->ic_oactive)
	242	goto restart;
	243
	244	/*
	245	* Not already active, deqeue a request and
	246	* map it onto the UNIBUS. If no more
	247	* requeusts, just return.
	248	*/
	249	IF_DEQUEUE(&sc->acc_if->if_snd, m);
	250	if (m == 0) {
	251	sc->acc_ic->ic_oactive = 0;
	252	return;
	253	}
	254	sc->acc_olen = if_wubaput(&sc->acc_ifuba, m);
	255
	256	restart:
	257	/*
a2cd4df7 BJ	258	* Have request mapped to UNIBUS for
a2cd4df7 BJ	259	* transmission; start the output.
28081cf8	260	*/
a2cd4df7 BJ	261	if (sc->acc_ifuba.ifu_flags & UBA_NEEDBDP)
a2cd4df7 BJ	262	UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_w.ifrw_bdp);
bcb5db7d	263	addr = (struct accdevice *)accinfo[unit]->ui_addr;
28081cf8	264	info = sc->acc_ifuba.ifu_w.ifrw_info;
a2cd4df7 BJ	265	addr->oba = (u_short)info;
a2cd4df7 BJ	266	addr->owc = -((sc->acc_olen + 1) >> 1);
28081cf8	267	cmd = ACC_IE \| OUT_ENLB \| ((info & 0x30000) >> 12) \| ACC_GO;
a2cd4df7 BJ	268	#ifdef LOOPBACK
	269	cmd \|= OUT_BBACK;
	270	#endif
	271	addr->ocsr = cmd;
28081cf8 SL	272	sc->acc_ic->ic_oactive = 1;
	273	}
	274
	275	/*
	276	* Output interrupt handler.
	277	*/
	278	accxint(unit)
	279	{
28081cf8 SL	280	register struct acc_softc *sc = &acc_softc[unit];
	281	register struct accdevice *addr;
	282
	283	COUNT(ACCXINT);
7dfb87a5	284	addr = (struct accdevice *)accinfo[unit]->ui_addr;
28081cf8	285	if (sc->acc_ic->ic_oactive == 0) {
7dfb87a5 SL	286	printf("acc%d: stray xmit interrupt, csr=%b\n", unit,
7dfb87a5 SL	287	addr->ocsr, ACC_OUTBITS);
28081cf8 SL	288	return;
28081cf8 SL	289	}
28081cf8 SL	290	sc->acc_if->if_opackets++;
28081cf8 SL	291	sc->acc_ic->ic_oactive = 0;
7dd4b7cb	292	if (addr->ocsr & ACC_ERR) {
7dfb87a5 SL	293	printf("acc%d: output error, ocsr=%b, icsr=%b\n", unit,
7dfb87a5 SL	294	addr->ocsr, ACC_OUTBITS, addr->icsr, ACC_INBITS);
28081cf8	295	sc->acc_if->if_oerrors++;
a0b7c7fb	296	}
a2cd4df7 BJ	297	if (sc->acc_ifuba.ifu_xtofree) {
	298	m_freem(sc->acc_ifuba.ifu_xtofree);
	299	sc->acc_ifuba.ifu_xtofree = 0;
28081cf8	300	}
b690198c SL	301	if (sc->acc_if->if_snd.ifq_head)
b690198c SL	302	accstart(unit);
28081cf8 SL	303	}
	304
	305	/*
	306	* Input interrupt handler
	307	*/
	308	accrint(unit)
	309	{
	310	register struct acc_softc *sc = &acc_softc[unit];
	311	register struct accdevice *addr;
28081cf8 SL	312	struct mbuf *m;
	313	int len, info;
	314
	315	COUNT(ACCRINT);
7dfb87a5	316	addr = (struct accdevice *)accinfo[unit]->ui_addr;
28081cf8 SL	317	sc->acc_if->if_ipackets++;
	318
	319	/*
	320	* Purge BDP; flush message if error indicated.
	321	*/
a2cd4df7 BJ	322	if (sc->acc_ifuba.ifu_flags & UBA_NEEDBDP)
a2cd4df7 BJ	323	UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_r.ifrw_bdp);
7dd4b7cb	324	if (addr->icsr & ACC_ERR) {
b690198c SL	325	printf("acc%d: input error, csr=%b\n", unit,
b690198c SL	326	addr->icsr, ACC_INBITS);
28081cf8 SL	327	sc->acc_if->if_ierrors++;
	328	sc->acc_flush = 1;
	329	}
	330
	331	if (sc->acc_flush) {
a2cd4df7	332	if (addr->icsr & IN_EOM)
28081cf8 SL	333	sc->acc_flush = 0;
	334	goto setup;
	335	}
e431883e BJ	336	len = IMPMTU + (addr->iwc << 1);
e431883e BJ	337	if (len < 0 \|\| len > IMPMTU) {
a2cd4df7 BJ	338	printf("acc%d: bad length=%d\n", len);
	339	sc->acc_if->if_ierrors++;
	340	goto setup;
	341	}
28081cf8 SL	342
	343	/*
	344	* The last parameter is always 0 since using
	345	* trailers on the ARPAnet is insane.
	346	*/
	347	m = if_rubaget(&sc->acc_ifuba, len, 0);
	348	if (m == 0)
	349	goto setup;
a2cd4df7	350	if ((addr->icsr & IN_EOM) == 0) {
a0b7c7fb	351	if (sc->acc_iq)
28081cf8	352	m_cat(sc->acc_iq, m);
a0b7c7fb	353	else
28081cf8	354	sc->acc_iq = m;
28081cf8 SL	355	goto setup;
28081cf8 SL	356	}
a0b7c7fb	357	if (sc->acc_iq) {
28081cf8 SL	358	m_cat(sc->acc_iq, m);
	359	m = sc->acc_iq;
	360	sc->acc_iq = 0;
28081cf8 SL	361	}
	362	impinput(unit, m);
	363
	364	setup:
	365	/*
	366	* Setup for next message.
	367	*/
	368	info = sc->acc_ifuba.ifu_r.ifrw_info;
a2cd4df7	369	addr->iba = (u_short)info;
e431883e	370	addr->iwc = -(IMPMTU >> 1);
a2cd4df7	371	addr->icsr =
28081cf8 SL	372	IN_MRDY \| ACC_IE \| IN_WEN \| ((info & 0x30000) >> 12) \| ACC_GO;
	373	}
	374	#endif