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

/*
 * 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_css.c	6.7 (Berkeley) %G%
 */

#include "css.h"
#if NCSS > 0

/*
 * DEC/CSS IMP11-A ARPAnet IMP interface driver.
 * Since "imp11a" is such a mouthful, it is called
 * "css" after the LH/DH being called "acc".
 *
 * Configuration notes:
 *
 * As delivered from DEC/CSS, it
 * is addressed and vectored as two DR11-B's.  This makes
 * Autoconfig almost IMPOSSIBLE.  To make it work, the
 * interrupt vectors must be restrapped to make the vectors
 * consecutive.  The 020 hole between the CSR addresses is
 * tolerated, althought that could be cleaned-up also.
 *
 * Additionally, the TRANSMIT side of the IMP11-A has the
 * lower address of the two subunits, so the vector ordering
 * in the CONFIG file is reversed from most other devices.
 * It should be:
 *
 * device css0 ....  cssxint cssrint
 *
 * If you get it wrong, it will still autoconfig, but will just
 * sit there with RECEIVE IDLE indicated on the front panel.
 */
#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_cssreg.h"
#include "if_uba.h"
#include "../vaxuba/ubareg.h"
#include "../vaxuba/ubavar.h"

int     cssprobe(), cssattach(), cssrint(), cssxint();
struct  uba_device *cssinfo[NCSS];
u_short cssstd[] = { 0 };
struct  uba_driver cssdriver =
        { cssprobe, 0, cssattach, 0, cssstd, "css", cssinfo };
#define CSSUNIT(x)      minor(x)

int     cssinit(), cssstart(), cssreset();

/*
 * "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 CSS.
 */
struct  css_softc {
        struct  ifnet *css_if;          /* pointer to IMP's ifnet struct */
        struct  impcb *css_ic;          /* data structure shared with IMP */
        struct  ifuba css_ifuba;        /* UNIBUS resources */
        struct  mbuf *css_iq;           /* input reassembly queue */
        short   css_olen;               /* size of last message sent */
        char    css_flush;              /* flush remainder of message */
} css_softc[NCSS];

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

#ifdef lint
        br = 0; cvec = br; br = cvec;
        cssrint(0); cssxint(0);
#endif


        addr->css_icsr = CSS_CLR;
        addr->css_ocsr = CSS_CLR;
        DELAY(50000);
	addr->css_icsr = 0;
	addr->css_ocsr = 0;
        DELAY(50000);

	addr->css_oba = 0;
	addr->css_owc = -1;
        addr->css_ocsr = CSS_IE | CSS_GO;	/* enable interrupts */
        DELAY(50000);
        addr->css_ocsr = 0;

        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.
 */
cssattach(ui)
        struct uba_device *ui;
{
        register struct css_softc *sc = &css_softc[ui->ui_unit];
        register struct impcb *ip;
        struct ifimpcb {
                struct  ifnet ifimp_if;
                struct  impcb ifimp_impcb;
        } *ifimp;

        if ((ifimp = (struct ifimpcb *)impattach(ui, cssreset)) == 0)
                return;
        sc->css_if = &ifimp->ifimp_if;
        ip = &ifimp->ifimp_impcb;
        sc->css_ic = ip;
        ip->ic_init = cssinit;
        ip->ic_start = cssstart;
	sc->css_ifuba.ifu_flags = UBA_CANTWAIT | UBA_NEED16;
#ifdef notdef
	sc->css_ifuba.ifu_flags =| UBA_NEEDBDP;
#endif
}

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

        if (unit >= NCSS || (ui = cssinfo[unit]) == 0 || ui->ui_alive == 0 ||
            ui->ui_ubanum != uban)
                return;
        printf(" css%d", unit);
        sc = &css_softc[unit];
	sc->css_if->if_flags &= ~IFF_RUNNING;
        /* must go through IMP to allow it to set state */
        (*sc->css_if->if_init)(unit);
}

/*
 * Initialize interface: clear recorded pending operations,
 * and retrieve, and reinitialize UNIBUS resources.
 */
cssinit(unit)
        int unit;
{       
        register struct css_softc *sc;
        register struct uba_device *ui;
        register struct cssdevice *addr;
        int x, info;

	if (unit >= NCSS || (ui = cssinfo[unit]) == 0 || ui->ui_alive == 0) {
		printf("css%d: not alive\n", unit);
		return(0);
	}
	sc = &css_softc[unit];

	/*
	 * Header length is 0 to if_ubainit since we have to pass
	 * the IMP leader up to the protocol interpretaion
	 * routines.  If we had the deader length as
	 * sizeof(struct imp_leader), then the if_ routines
	 * would assume we handle it on input and output.
	 */
	
        if (if_ubainit(&sc->css_ifuba, ui->ui_ubanum, 0,(int)btoc(IMPMTU)) == 0) {
                printf("css%d: can't initialize\n", unit);
		ui->ui_alive = 0;
		sc->css_if->if_flags &= ~(IFF_UP | IFF_RUNNING);
		return(0);
        }
	sc->css_if->if_flags |= IFF_RUNNING;
        addr = (struct cssdevice *)ui->ui_addr;

        /* reset the imp interface. */
        x = spl5();
        addr->css_icsr = CSS_CLR;
        addr->css_ocsr = CSS_CLR;
	DELAY(100);
	addr->css_icsr = 0;
	addr->css_ocsr = 0;
        addr->css_icsr = IN_HRDY;       /* close the relay */
	DELAY(5000);
        splx(x);

        /*
	 * This may hang if the imp isn't really there.
	 * Will test and verify safe operation.
	 */

	x = 500;
	while (x-- > 0) {
		if ((addr->css_icsr & (IN_HRDY|IN_IMPNR)) == IN_HRDY) 
			break;
                addr->css_icsr = IN_HRDY;	/* close the relay */
                DELAY(5000);
        }

	if (x <= 0) {
		printf("css%d: imp doesn't respond, icsr=%b\n", unit,
			CSS_INBITS, addr->css_icsr);
		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).
	 * Note: IMPMTU includes the leader.
         */

        x = spl5();
        info = sc->css_ifuba.ifu_r.ifrw_info;
        addr->css_iba = (u_short)info;
        addr->css_iwc = -(IMPMTU >> 1);
        addr->css_icsr = 
                IN_HRDY | CSS_IE | IN_WEN | ((info & 0x30000) >> 12) | CSS_GO;
        splx(x);
	return(1);

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

/*
 * Start output on an interface.
 */
cssstart(dev)
        dev_t dev;
{
        int unit = CSSUNIT(dev), info;
        struct uba_device *ui = cssinfo[unit];
        register struct css_softc *sc = &css_softc[unit];
        register struct cssdevice *addr;
        struct mbuf *m;
        u_short cmd;

        if (sc->css_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->css_if->if_snd, m);
        if (m == 0) {
                sc->css_ic->ic_oactive = 0;
                return;
        }
        sc->css_olen = if_wubaput(&sc->css_ifuba, m);

restart:
        /*
         * Have request mapped to UNIBUS for transmission.
         * Purge any stale data from the BDP, and start the output.
         */
	if (sc->css_ifuba.ifu_flags & UBA_NEEDBDP)
		UBAPURGE(sc->css_ifuba.ifu_uba, sc->css_ifuba.ifu_w.ifrw_bdp);
        addr = (struct cssdevice *)ui->ui_addr;
        info = sc->css_ifuba.ifu_w.ifrw_info;
        addr->css_oba = (u_short)info;
        addr->css_owc = -((sc->css_olen + 1) >> 1);
        cmd = CSS_IE | OUT_ENLB | ((info & 0x30000) >> 12) | CSS_GO;
        addr->css_ocsr = cmd;
        sc->css_ic->ic_oactive = 1;
}

/*
 * Output interrupt handler.
 */
cssxint(unit)
{
        register struct uba_device *ui = cssinfo[unit];
        register struct css_softc *sc = &css_softc[unit];
        register struct cssdevice *addr;

        addr = (struct cssdevice *)ui->ui_addr;
        if (sc->css_ic->ic_oactive == 0) {
                printf("css%d: stray output interrupt csr=%b\n",
			unit, addr->css_ocsr, CSS_OUTBITS);
                return;
        }
        sc->css_if->if_opackets++;
        sc->css_ic->ic_oactive = 0;
        if (addr->css_ocsr & CSS_ERR){
                sc->css_if->if_oerrors++;
                printf("css%d: output error, ocsr=%b icsr=%b\n", unit,
                        addr->css_ocsr, CSS_OUTBITS,
			addr->css_icsr, CSS_INBITS);
	}
	if (sc->css_ifuba.ifu_xtofree) {
		m_freem(sc->css_ifuba.ifu_xtofree);
		sc->css_ifuba.ifu_xtofree = 0;
	}
	if (sc->css_if->if_snd.ifq_head)
		cssstart(unit);
}

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

        sc->css_if->if_ipackets++;

        /*
         * Purge BDP; flush message if error indicated.
         */

        addr = (struct cssdevice *)cssinfo[unit]->ui_addr;
	if (sc->css_ifuba.ifu_flags & UBA_NEEDBDP)
		UBAPURGE(sc->css_ifuba.ifu_uba, sc->css_ifuba.ifu_r.ifrw_bdp);
        if (addr->css_icsr & CSS_ERR) {
                printf("css%d: recv error, csr=%b\n", unit,
                    addr->css_icsr, CSS_INBITS);
                sc->css_if->if_ierrors++;
                sc->css_flush = 1;
        }

        if (sc->css_flush) {
                if (addr->css_icsr & IN_EOM)
                        sc->css_flush = 0;
                goto setup;
        }

        len = IMPMTU + (addr->css_iwc << 1);
	if (len < 0 || len > IMPMTU) {
		printf("css%d: bad length=%d\n", len);
		sc->css_if->if_ierrors++;
		goto setup;
	}

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

setup:
        /*
         * Setup for next message.
         */
        info = sc->css_ifuba.ifu_r.ifrw_info;
        addr->css_iba = (u_short)info;
        addr->css_iwc = - (IMPMTU >> 1);
        addr->css_icsr =
                IN_HRDY | CSS_IE | IN_WEN | ((info & 0x30000) >> 12) | CSS_GO;
}
#endif
Commit	Line	Data
da7c5cc6 KM	1	/*
	2	* Copyright (c) 1982 Regents of the University of California.
	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*
c72dac84	6	* @(#)if_css.c 6.7 (Berkeley) %G%
da7c5cc6	7	*/
ee6d9923 SL	8
ee6d9923 SL	9	#include "css.h"
9a0b0c74	10	#if NCSS > 0
ee6d9923 SL	11
	12	/*
	13	* DEC/CSS IMP11-A ARPAnet IMP interface driver.
	14	* Since "imp11a" is such a mouthful, it is called
	15	* "css" after the LH/DH being called "acc".
	16	*
	17	* Configuration notes:
	18	*
	19	* As delivered from DEC/CSS, it
	20	* is addressed and vectored as two DR11-B's. This makes
	21	* Autoconfig almost IMPOSSIBLE. To make it work, the
	22	* interrupt vectors must be restrapped to make the vectors
	23	* consecutive. The 020 hole between the CSR addresses is
	24	* tolerated, althought that could be cleaned-up also.
	25	*
	26	* Additionally, the TRANSMIT side of the IMP11-A has the
	27	* lower address of the two subunits, so the vector ordering
	28	* in the CONFIG file is reversed from most other devices.
	29	* It should be:
	30	*
	31	* device css0 .... cssxint cssrint
	32	*
	33	* If you get it wrong, it will still autoconfig, but will just
fd4d8418	34	* sit there with RECEIVE IDLE indicated on the front panel.
ee6d9923	35	*/
961945a8	36	#include "../machine/pte.h"
ee6d9923	37
a6e960e7 JB	38	#include "param.h"
	39	#include "systm.h"
	40	#include "mbuf.h"
	41	#include "buf.h"
	42	#include "protosw.h"
	43	#include "socket.h"
	44	#include "vmmac.h"
a9687d27	45
ee6d9923	46	#include "../net/if.h"
d2cc167c	47	#include "../netimp/if_imp.h"
a9687d27 BJ	48
	49	#include "../vax/cpu.h"
	50	#include "../vax/mtpr.h"
a6e960e7 JB	51	#include "if_cssreg.h"
a6e960e7 JB	52	#include "if_uba.h"
a9687d27 BJ	53	#include "../vaxuba/ubareg.h"
a9687d27 BJ	54	#include "../vaxuba/ubavar.h"
ee6d9923 SL	55
	56	int cssprobe(), cssattach(), cssrint(), cssxint();
	57	struct uba_device *cssinfo[NCSS];
	58	u_short cssstd[] = { 0 };
	59	struct uba_driver cssdriver =
	60	{ cssprobe, 0, cssattach, 0, cssstd, "css", cssinfo };
	61	#define CSSUNIT(x) minor(x)
	62
	63	int cssinit(), cssstart(), cssreset();
	64
	65	/*
	66	* "Lower half" of IMP interface driver.
	67	*
	68	* Each IMP interface is handled by a common module which handles
	69	* the IMP-host protocol and a hardware driver which manages the
	70	* hardware specific details of talking with the IMP.
	71	*
	72	* The hardware portion of the IMP driver handles DMA and related
	73	* management of UNIBUS resources. The IMP protocol module interprets
	74	* contents of these messages and "controls" the actions of the
	75	* hardware module during IMP resets, but not, for instance, during
	76	* UNIBUS resets.
	77	*
	78	* The two modules are coupled at "attach time", and ever after,
	79	* through the imp interface structure. Higher level protocols,
	80	* e.g. IP, interact with the IMP driver, rather than the CSS.
	81	*/
	82	struct css_softc {
	83	struct ifnet css_if; / pointer to IMP's ifnet struct */
	84	struct impcb css_ic; / data structure shared with IMP */
	85	struct ifuba css_ifuba; /* UNIBUS resources */
	86	struct mbuf css_iq; / input reassembly queue */
	87	short css_olen; /* size of last message sent */
	88	char css_flush; /* flush remainder of message */
	89	} css_softc[NCSS];
	90
	91	/*
	92	* Reset the IMP and cause a transmitter interrupt by
	93	* performing a null DMA.
	94	*/
	95	cssprobe(reg)
	96	caddr_t reg;
	97	{
	98	register int br, cvec; /* r11, r10 value-result */
	99	register struct cssdevice addr = (struct cssdevice )reg;
	100
ee6d9923 SL	101	#ifdef lint
	102	br = 0; cvec = br; br = cvec;
	103	cssrint(0); cssxint(0);
	104	#endif
	105
	106
	107	addr->css_icsr = CSS_CLR;
	108	addr->css_ocsr = CSS_CLR;
	109	DELAY(50000);
	110	addr->css_icsr = 0;
	111	addr->css_ocsr = 0;
	112	DELAY(50000);
	113
	114	addr->css_oba = 0;
	115	addr->css_owc = -1;
	116	addr->css_ocsr = CSS_IE \| CSS_GO; /* enable interrupts */
	117	DELAY(50000);
	118	addr->css_ocsr = 0;
	119
	120	return (1);
	121	}
	122
	123	/*
	124	* Call the IMP module to allow it to set up its internal
	125	* state, then tie the two modules together by setting up
	126	* the back pointers to common data structures.
	127	*/
	128	cssattach(ui)
	129	struct uba_device *ui;
	130	{
	131	register struct css_softc *sc = &css_softc[ui->ui_unit];
	132	register struct impcb *ip;
	133	struct ifimpcb {
	134	struct ifnet ifimp_if;
	135	struct impcb ifimp_impcb;
	136	} *ifimp;
	137
50241bf5	138	if ((ifimp = (struct ifimpcb *)impattach(ui, cssreset)) == 0)
fd4d8418	139	return;
ee6d9923 SL	140	sc->css_if = &ifimp->ifimp_if;
	141	ip = &ifimp->ifimp_impcb;
	142	sc->css_ic = ip;
	143	ip->ic_init = cssinit;
	144	ip->ic_start = cssstart;
	145	sc->css_ifuba.ifu_flags = UBA_CANTWAIT \| UBA_NEED16;
	146	#ifdef notdef
	147	sc->css_ifuba.ifu_flags =\| UBA_NEEDBDP;
	148	#endif
	149	}
	150
	151	/*
	152	* Reset interface after UNIBUS reset.
	153	* If interface is on specified uba, reset its state.
	154	*/
	155	cssreset(unit, uban)
	156	int unit, uban;
	157	{
	158	register struct uba_device *ui;
	159	struct css_softc *sc;
	160
ee6d9923 SL	161	if (unit >= NCSS \|\| (ui = cssinfo[unit]) == 0 \|\| ui->ui_alive == 0 \|\|
	162	ui->ui_ubanum != uban)
	163	return;
	164	printf(" css%d", unit);
	165	sc = &css_softc[unit];
1a568327	166	sc->css_if->if_flags &= ~IFF_RUNNING;
ee6d9923 SL	167	/* must go through IMP to allow it to set state */
	168	(*sc->css_if->if_init)(unit);
	169	}
	170
	171	/*
	172	* Initialize interface: clear recorded pending operations,
	173	* and retrieve, and reinitialize UNIBUS resources.
	174	*/
	175	cssinit(unit)
	176	int unit;
	177	{
	178	register struct css_softc *sc;
	179	register struct uba_device *ui;
	180	register struct cssdevice *addr;
	181	int x, info;
	182
ee6d9923 SL	183	if (unit >= NCSS \|\| (ui = cssinfo[unit]) == 0 \|\| ui->ui_alive == 0) {
	184	printf("css%d: not alive\n", unit);
	185	return(0);
	186	}
	187	sc = &css_softc[unit];
	188
	189	/*
	190	* Header length is 0 to if_ubainit since we have to pass
	191	* the IMP leader up to the protocol interpretaion
	192	* routines. If we had the deader length as
	193	* sizeof(struct imp_leader), then the if_ routines
	194	* would assume we handle it on input and output.
	195	*/
	196
	197	if (if_ubainit(&sc->css_ifuba, ui->ui_ubanum, 0,(int)btoc(IMPMTU)) == 0) {
	198	printf("css%d: can't initialize\n", unit);
	199	ui->ui_alive = 0;
fd4d8418	200	sc->css_if->if_flags &= ~(IFF_UP \| IFF_RUNNING);
ee6d9923 SL	201	return(0);
ee6d9923 SL	202	}
1a568327	203	sc->css_if->if_flags \|= IFF_RUNNING;
ee6d9923 SL	204	addr = (struct cssdevice *)ui->ui_addr;
	205
	206	/* reset the imp interface. */
	207	x = spl5();
	208	addr->css_icsr = CSS_CLR;
	209	addr->css_ocsr = CSS_CLR;
	210	DELAY(100);
	211	addr->css_icsr = 0;
	212	addr->css_ocsr = 0;
	213	addr->css_icsr = IN_HRDY; /* close the relay */
	214	DELAY(5000);
	215	splx(x);
	216
	217	/*
	218	* This may hang if the imp isn't really there.
	219	* Will test and verify safe operation.
	220	*/
	221
	222	x = 500;
	223	while (x-- > 0) {
	224	if ((addr->css_icsr & (IN_HRDY\|IN_IMPNR)) == IN_HRDY)
	225	break;
	226	addr->css_icsr = IN_HRDY; /* close the relay */
	227	DELAY(5000);
	228	}
	229
	230	if (x <= 0) {
	231	printf("css%d: imp doesn't respond, icsr=%b\n", unit,
	232	CSS_INBITS, addr->css_icsr);
	233	goto down;
	234	}
	235
	236	/*
	237	* Put up a read. We can't restart any outstanding writes
	238	* until we're back in synch with the IMP (i.e. we've flushed
	239	* the NOOPs it throws at us).
	240	* Note: IMPMTU includes the leader.
	241	*/
	242
	243	x = spl5();
	244	info = sc->css_ifuba.ifu_r.ifrw_info;
	245	addr->css_iba = (u_short)info;
	246	addr->css_iwc = -(IMPMTU >> 1);
	247	addr->css_icsr =
	248	IN_HRDY \| CSS_IE \| IN_WEN \| ((info & 0x30000) >> 12) \| CSS_GO;
	249	splx(x);
	250	return(1);
	251
	252	down:
	253	ui->ui_alive = 0;
	254	return(0);
	255	}
	256
	257	/*
	258	* Start output on an interface.
	259	*/
	260	cssstart(dev)
	261	dev_t dev;
	262	{
	263	int unit = CSSUNIT(dev), info;
	264	struct uba_device *ui = cssinfo[unit];
	265	register struct css_softc *sc = &css_softc[unit];
	266	register struct cssdevice *addr;
	267	struct mbuf *m;
268	u_short cmd;
269
ee6d9923 SL	270	if (sc->css_ic->ic_oactive)
	271	goto restart;
	272
	273	/*
	274	* Not already active, deqeue a request and
	275	* map it onto the UNIBUS. If no more
	276	* requeusts, just return.
	277	*/
	278	IF_DEQUEUE(&sc->css_if->if_snd, m);
	279	if (m == 0) {
	280	sc->css_ic->ic_oactive = 0;
	281	return;
	282	}
	283	sc->css_olen = if_wubaput(&sc->css_ifuba, m);
	284
	285	restart:
	286	/*
	287	* Have request mapped to UNIBUS for transmission.
	288	* Purge any stale data from the BDP, and start the output.
	289	*/
	290	if (sc->css_ifuba.ifu_flags & UBA_NEEDBDP)
	291	UBAPURGE(sc->css_ifuba.ifu_uba, sc->css_ifuba.ifu_w.ifrw_bdp);
	292	addr = (struct cssdevice *)ui->ui_addr;
	293	info = sc->css_ifuba.ifu_w.ifrw_info;
	294	addr->css_oba = (u_short)info;
	295	addr->css_owc = -((sc->css_olen + 1) >> 1);
	296	cmd = CSS_IE \| OUT_ENLB \| ((info & 0x30000) >> 12) \| CSS_GO;
	297	addr->css_ocsr = cmd;
	298	sc->css_ic->ic_oactive = 1;
	299	}
	300
	301	/*
	302	* Output interrupt handler.
	303	*/
	304	cssxint(unit)
	305	{
	306	register struct uba_device *ui = cssinfo[unit];
	307	register struct css_softc *sc = &css_softc[unit];
	308	register struct cssdevice *addr;
	309
ee6d9923 SL	310	addr = (struct cssdevice *)ui->ui_addr;
	311	if (sc->css_ic->ic_oactive == 0) {
	312	printf("css%d: stray output interrupt csr=%b\n",
	313	unit, addr->css_ocsr, CSS_OUTBITS);
	314	return;
	315	}
	316	sc->css_if->if_opackets++;
	317	sc->css_ic->ic_oactive = 0;
	318	if (addr->css_ocsr & CSS_ERR){
	319	sc->css_if->if_oerrors++;
	320	printf("css%d: output error, ocsr=%b icsr=%b\n", unit,
	321	addr->css_ocsr, CSS_OUTBITS,
	322	addr->css_icsr, CSS_INBITS);
	323	}
	324	if (sc->css_ifuba.ifu_xtofree) {
	325	m_freem(sc->css_ifuba.ifu_xtofree);
	326	sc->css_ifuba.ifu_xtofree = 0;
	327	}
	328	if (sc->css_if->if_snd.ifq_head)
	329	cssstart(unit);
	330	}
	331
	332	/*
	333	* Input interrupt handler
	334	*/
	335	cssrint(unit)
	336	{
	337	register struct css_softc *sc = &css_softc[unit];
	338	register struct cssdevice *addr;
ee6d9923 SL	339	struct mbuf *m;
	340	int len, info;
	341
ee6d9923 SL	342	sc->css_if->if_ipackets++;
	343
	344	/*
	345	* Purge BDP; flush message if error indicated.
	346	*/
	347
	348	addr = (struct cssdevice *)cssinfo[unit]->ui_addr;
	349	if (sc->css_ifuba.ifu_flags & UBA_NEEDBDP)
	350	UBAPURGE(sc->css_ifuba.ifu_uba, sc->css_ifuba.ifu_r.ifrw_bdp);
	351	if (addr->css_icsr & CSS_ERR) {
	352	printf("css%d: recv error, csr=%b\n", unit,
	353	addr->css_icsr, CSS_INBITS);
	354	sc->css_if->if_ierrors++;
	355	sc->css_flush = 1;
	356	}
	357
	358	if (sc->css_flush) {
	359	if (addr->css_icsr & IN_EOM)
	360	sc->css_flush = 0;
	361	goto setup;
	362	}
	363
	364	len = IMPMTU + (addr->css_iwc << 1);
	365	if (len < 0 \|\| len > IMPMTU) {
	366	printf("css%d: bad length=%d\n", len);
	367	sc->css_if->if_ierrors++;
	368	goto setup;
	369	}
	370
	371	/*
fd4d8418	372	* The offset parameter is always 0 since using
ee6d9923 SL	373	* trailers on the ARPAnet is insane.
ee6d9923 SL	374	*/
c72dac84	375	m = if_rubaget(&sc->css_ifuba, len, 0, sc->css_if);
ee6d9923 SL	376	if (m == 0)
	377	goto setup;
	378	if ((addr->css_icsr & IN_EOM) == 0) {
	379	if (sc->css_iq)
	380	m_cat(sc->css_iq, m);
	381	else
	382	sc->css_iq = m;
	383	goto setup;
	384	}
	385	if (sc->css_iq) {
	386	m_cat(sc->css_iq, m);
	387	m = sc->css_iq;
	388	sc->css_iq = 0;
	389	}
	390	impinput(unit, m);
	391
	392	setup:
	393	/*
	394	* Setup for next message.
	395	*/
	396	info = sc->css_ifuba.ifu_r.ifrw_info;
	397	addr->css_iba = (u_short)info;
	398	addr->css_iwc = - (IMPMTU >> 1);
	399	addr->css_icsr =
	400	IN_HRDY \| CSS_IE \| IN_WEN \| ((info & 0x30000) >> 12) \| CSS_GO;
	401	}
9a0b0c74	402	#endif