[unix-history] / usr / src / sys / vax / uba / rk.c

/*	rk.c	4.21	%G%	*/

#include "rk.h"
#if NHK > 0
int	rkwaitdry;
/*
 * RK11/RK07 disk driver
 *
 * This driver mimics up.c; see it for an explanation of common code.
 *
 * TODO:
 *	Add reading of bad sector information and disk layout from sector 1
 *	Add bad sector forwarding code
 *	Why do we lose an interrupt sometime when spinning drives down?
 */
#define	DELAY(i)		{ register int j; j = i; while (--j > 0); }
#include "../h/param.h"
#include "../h/systm.h"
#include "../h/buf.h"
#include "../h/conf.h"
#include "../h/dir.h"
#include "../h/user.h"
#include "../h/pte.h"
#include "../h/map.h"
#include "../h/vm.h"
#include "../h/uba.h"
#include "../h/dk.h"
#include "../h/cpu.h"
#include "../h/cmap.h"

#include "../h/rkreg.h"

struct	rk_softc {
	int	sc_softas;
	int	sc_ndrive;
	int	sc_wticks;
	int	sc_recal;
} rk_softc[NHK];

/* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */
struct size {
	daddr_t	nblocks;
	int	cyloff;
} rk7_sizes[] ={
	15884,	0,		/* A=cyl 0 thru 240 */
	10032,	241,		/* B=cyl 241 thru 392 */
	53790,	0,		/* C=cyl 0 thru 814 */
	0,	0,
	0,	0,
	0,	0,
	27786,	393,		/* G=cyl 393 thru 813 */
	0,	0,
};
/* END OF STUFF WHICH SHOULD BE READ IN PER DISK */

int	rkprobe(), rkslave(), rkattach(), rkdgo(), rkintr();
struct	uba_minfo *rkminfo[NHK];
struct	uba_dinfo *rkdinfo[NRK];
struct	uba_dinfo *rkip[NHK][4];

u_short	rkstd[] = { 0777440, 0 };
struct	uba_driver hkdriver =
 { rkprobe, rkslave, rkattach, rkdgo, rkstd, "rk", rkdinfo, "hk", rkminfo, 1 };
struct	buf rkutab[NRK];
short	rkcyl[NRK];

struct	rkst {
	short	nsect;
	short	ntrak;
	short	nspc;
	short	ncyl;
	struct	size *sizes;
} rkst[] = {
	NRKSECT, NRKTRK, NRKSECT*NRKTRK,	NRK7CYL,	rk7_sizes,
};

u_char 	rk_offset[16] =
  { P400,M400,P400,M400,P800,M800,P800,M800,P1200,M1200,P1200,M1200,0,0,0,0 };

struct	buf rrkbuf[NRK];

#define	b_cylin	b_resid

#ifdef INTRLVE
daddr_t	dkblock();
#endif

int	rkwstart, rkwatch();

rkprobe(reg)
	caddr_t reg;
{
	register int br, cvec;

#ifdef lint	
	br = 0; cvec = br; br = cvec;
#endif
	((struct rkdevice *)reg)->rkcs1 = RK_CDT|RK_IE|RK_CRDY;
	DELAY(10);
	((struct rkdevice *)reg)->rkcs1 = RK_CDT;
	return (1);
}

rkslave(ui, reg)
	struct uba_dinfo *ui;
	caddr_t reg;
{
	register struct rkdevice *rkaddr = (struct rkdevice *)reg;

	rkaddr->rkcs1 = RK_CDT|RK_CCLR;
	rkaddr->rkcs2 = ui->ui_slave;
	rkaddr->rkcs1 = RK_CDT|RK_SELECT|RK_GO;
	rkwait(rkaddr);
	DELAY(50);
	if (rkaddr->rkcs2&RK_NED || (rkaddr->rkds&RK_SVAL) == 0) {
		rkaddr->rkcs1 = RK_CDT|RK_CCLR;
		return (0);
	}
	return (1);
}

rkattach(ui)
	register struct uba_dinfo *ui;
{

	if (rkwstart == 0) {
		timeout(rkwatch, (caddr_t)0, hz);
		rkwstart++;
	}
	if (ui->ui_dk >= 0)
		dk_mspw[ui->ui_dk] = 1.0 / (60 * NRKSECT * 256);
	rkip[ui->ui_ctlr][ui->ui_slave] = ui;
	rk_softc[ui->ui_ctlr].sc_ndrive++;
	rkcyl[ui->ui_unit] = -1;
}
 
rkstrategy(bp)
	register struct buf *bp;
{
	register struct uba_dinfo *ui;
	register struct rkst *st;
	register int unit;
	register struct buf *dp;
	int xunit = minor(bp->b_dev) & 07;
	long bn, sz;

	sz = (bp->b_bcount+511) >> 9;
	unit = dkunit(bp);
	if (unit >= NRK)
		goto bad;
	ui = rkdinfo[unit];
	if (ui == 0 || ui->ui_alive == 0)
		goto bad;
	st = &rkst[ui->ui_type];
	if (bp->b_blkno < 0 ||
	    (bn = dkblock(bp))+sz > st->sizes[xunit].nblocks)
		goto bad;
	bp->b_cylin = bn/st->nspc + st->sizes[xunit].cyloff;
	(void) spl5();
	dp = &rkutab[ui->ui_unit];
	disksort(dp, bp);
	if (dp->b_active == 0) {
		(void) rkustart(ui);
		bp = &ui->ui_mi->um_tab;
		if (bp->b_actf && bp->b_active == 0)
			(void) rkstart(ui->ui_mi);
	}
	(void) spl0();
	return;

bad:
	bp->b_flags |= B_ERROR;
	iodone(bp);
	return;
}

rkustart(ui)
	register struct uba_dinfo *ui;
{
	register struct buf *bp, *dp;
	register struct uba_minfo *um;
	register struct rkdevice *rkaddr;
	register struct rkst *st;
	daddr_t bn;
	int sn, csn;
	int didie = 0;

	if (ui == 0)
		return (0);
	dk_busy &= ~(1<<ui->ui_dk);
	dp = &rkutab[ui->ui_unit];
	um = ui->ui_mi;
	rkaddr = (struct rkdevice *)um->um_addr;
	if (um->um_tab.b_active) {
		rk_softc[um->um_ctlr].sc_softas |= 1<<ui->ui_slave;
		return (0);
	}
	rkaddr->rkcs1 = RK_CDT|RK_CERR;
	rkaddr->rkcs2 = ui->ui_slave;
	rkaddr->rkcs1 = RK_CDT|RK_SELECT|RK_GO;
	rkwait(rkaddr);
	if ((bp = dp->b_actf) == NULL) {
		rkaddr->rkcs1 = RK_CDT|RK_DCLR|RK_GO;
		rkwait(rkaddr);
		return (0);
	}
	if ((rkaddr->rkds & RK_VV) == 0) {
		/* SHOULD WARN SYSTEM THAT THIS HAPPENED */
		rkaddr->rkcs1 = RK_CDT|RK_PACK|RK_GO;
		rkwait(rkaddr);
	}
	if (dp->b_active)
		goto done;
	dp->b_active = 1;
	if ((rkaddr->rkds & RK_DREADY) != RK_DREADY)
		goto done;
	if (rk_softc[um->um_ctlr].sc_ndrive == 1)
		goto done;
	if (bp->b_cylin == rkcyl[ui->ui_unit])
		goto done;
	rkaddr->rkcyl = bp->b_cylin;
	rkcyl[ui->ui_unit] = bp->b_cylin;
	rkaddr->rkcs1 = RK_CDT|RK_IE|RK_SEEK|RK_GO;
	didie = 1;
	if (ui->ui_dk >= 0) {
		dk_busy |= 1<<ui->ui_dk;
		dk_seek[ui->ui_dk]++;
	}
	goto out;
done:
	if (dp->b_active != 2) {
		dp->b_forw = NULL;
		if (um->um_tab.b_actf == NULL)
			um->um_tab.b_actf = dp;
		else
			um->um_tab.b_actl->b_forw = dp;
		um->um_tab.b_actl = dp;
		dp->b_active = 2;
	}
out:
	return (didie);
}

rkstart(um)
	register struct uba_minfo *um;
{
	register struct buf *bp, *dp;
	register struct uba_dinfo *ui;
	register struct rkdevice *rkaddr;
	struct rkst *st;
	daddr_t bn;
	int sn, tn, cmd;
	int waitdry;

loop:
	if ((dp = um->um_tab.b_actf) == NULL)
		return (0);
	if ((bp = dp->b_actf) == NULL) {
		um->um_tab.b_actf = dp->b_forw;
		goto loop;
	}
	um->um_tab.b_active++;
	ui = rkdinfo[dkunit(bp)];
	bn = dkblock(bp);
	st = &rkst[ui->ui_type];
	sn = bn%st->nspc;
	tn = sn/st->nsect;
	sn %= st->nsect;
	rkaddr = (struct rkdevice *)ui->ui_addr;
	rkaddr->rkcs1 = RK_CDT|RK_CERR;
	rkaddr->rkcs2 = ui->ui_slave;
	rkaddr->rkcs1 = RK_CDT|RK_SELECT|RK_GO;
	rkwait(rkaddr);
	waitdry = 0;
	while ((rkaddr->rkds&RK_SVAL) == 0) {
		if (++waitdry > 32)
			break;
		rkwaitdry++;
	}
	if ((rkaddr->rkds&RK_DREADY) != RK_DREADY) {
		printf("rk%d: not ready", dkunit(bp));
		if ((rkaddr->rkds&RK_DREADY) != RK_DREADY) {
			printf("\n");
			rkaddr->rkcs1 = RK_CDT|RK_DCLR|RK_GO;
			rkwait(rkaddr);
			rkaddr->rkcs1 = RK_CDT|RK_CERR;
			rkwait(rkaddr);
			um->um_tab.b_active = 0;
			um->um_tab.b_errcnt = 0;
			dp->b_actf = bp->av_forw;
			dp->b_active = 0;
			bp->b_flags |= B_ERROR;
			iodone(bp);
			goto loop;
		}
		printf(" (came back!)\n");
	}
	if (um->um_tab.b_errcnt >= 16 && (bp->b_flags&B_READ) != 0) {
		rkaddr->rkatt = rk_offset[um->um_tab.b_errcnt & 017];
		rkaddr->rkcs1 = RK_CDT|RK_OFFSET|RK_GO;
		rkwait(rkaddr);
	}
	rkaddr->rkcyl = bp->b_cylin;
	rkcyl[ui->ui_unit] = bp->b_cylin;
	rkaddr->rkda = (tn << 8) + sn;
	rkaddr->rkwc = -bp->b_bcount / sizeof (short);
	if (bp->b_flags & B_READ)
		cmd = RK_CDT|RK_IE|RK_READ|RK_GO;
	else
		cmd = RK_CDT|RK_IE|RK_WRITE|RK_GO;
	um->um_cmd = cmd;
	ubago(ui);
	return (1);
}

rkdgo(um)
	register struct uba_minfo *um;
{
	register struct rkdevice *rkaddr = (struct rkdevice *)um->um_addr;

	rkaddr->rkba = um->um_ubinfo;
	rkaddr->rkcs1 = um->um_cmd|((um->um_ubinfo>>8)&0x300);
}

rkintr(rk11)
	int rk11;
{
	register struct uba_minfo *um = rkminfo[rk11];
	register struct uba_dinfo *ui;
	register struct rkdevice *rkaddr = (struct rkdevice *)um->um_addr;
	register struct buf *bp, *dp;
	int unit;
	struct rk_softc *sc = &rk_softc[um->um_ctlr];
	int as = (rkaddr->rkatt >> 8) | sc->sc_softas;
	int needie = 1;

	sc->sc_wticks = 0;
	sc->sc_softas = 0;
	if (um->um_tab.b_active) {
		dp = um->um_tab.b_actf;
		bp = dp->b_actf;
		ui = rkdinfo[dkunit(bp)];
		dk_busy &= ~(1 << ui->ui_dk);
		if (rkaddr->rkcs1 & RK_CERR) {
			int recal;
			u_short ds = rkaddr->rkds;
			u_short cs2 = rkaddr->rkcs2;
			u_short er = rkaddr->rker;
			if (ds & RK_WLE) {
				printf("rk%d: write locked\n", dkunit(bp));
				bp->b_flags |= B_ERROR;
			} else if (++um->um_tab.b_errcnt > 28 ||
			    ds&RKDS_HARD || er&RKER_HARD || cs2&RKCS2_HARD) {
				bp->b_flags |= B_ERROR;
				harderr(bp, "rk");
				printf("cs2=%b ds=%b er=%b\n",
				    cs2, RKCS2_BITS, ds, 
				    RKDS_BITS, er, RKER_BITS);
			} else
				um->um_tab.b_active = 0;
			if (cs2&RK_MDS) {
				rkaddr->rkcs2 = RK_SCLR;
				goto retry;
			}
			recal = 0;
			if (ds&RK_DROT || er&(RK_OPI|RK_SKI|RK_UNS) ||
			    (um->um_tab.b_errcnt&07) == 4)
				recal = 1;
			if ((er & (RK_DCK|RK_ECH)) == RK_DCK)
				if (rkecc(ui))
					return;
			rkaddr->rkcs1 = RK_CDT|RK_CCLR;
			rkaddr->rkcs2 = ui->ui_slave;
			rkaddr->rkcs1 = RK_CDT|RK_DCLR|RK_GO;
			rkwait(rkaddr);
			if (recal && um->um_tab.b_active == 0) {
				rkaddr->rkcs1 = RK_CDT|RK_IE|RK_RECAL|RK_GO;
				rkcyl[ui->ui_unit] = -1;
				rkwait(rkaddr);
				um->um_tab.b_active = 1;
				sc->sc_recal = 1;
				return;
			}
		}
retry:
		if (sc->sc_recal) {
			sc->sc_recal = 0;
			um->um_tab.b_active = 0;
		}
		ubadone(um);
		if (um->um_tab.b_active) {
			um->um_tab.b_active = 0;
			um->um_tab.b_errcnt = 0;
			um->um_tab.b_actf = dp->b_forw;
			dp->b_active = 0;
			dp->b_errcnt = 0;
			dp->b_actf = bp->av_forw;
			bp->b_resid = -rkaddr->rkwc * sizeof(short);
			iodone(bp);
			if (dp->b_actf)
				if (rkustart(ui))
					needie = 0;
		}
		as &= ~(1<<ui->ui_slave);
	}
att:
	for (unit = 0; as; as >>= 1, unit++)
		if (as & 1)
			if (rkustart(rkip[rk11][unit]))
				needie = 0;
	if (um->um_tab.b_actf && um->um_tab.b_active == 0)
		if (rkstart(um))
			needie = 0;
	if (needie)
		rkaddr->rkcs1 = RK_CDT|RK_IE;
}

rkwait(addr)
	register struct rkdevice *addr;
{

	while ((addr->rkcs1 & RK_CRDY) == 0)
		;
}

rkread(dev)
	dev_t dev;
{
	register int unit = minor(dev) >> 3;

	if (unit >= NRK)
		u.u_error = ENXIO;
	else
		physio(rkstrategy, &rrkbuf[unit], dev, B_READ, minphys);
}

rkwrite(dev)
	dev_t dev;
{
	register int unit = minor(dev) >> 3;

	if (unit >= NRK)
		u.u_error = ENXIO;
	else
		physio(rkstrategy, &rrkbuf[unit], dev, B_WRITE, minphys);
}

rkecc(ui)
	register struct uba_dinfo *ui;
{
	register struct rkdevice *rk = (struct rkdevice *)ui->ui_addr;
	register struct buf *bp = rkutab[ui->ui_unit].b_actf;
	register struct uba_minfo *um = ui->ui_mi;
	register struct rkst *st;
	struct uba_regs *ubp = ui->ui_hd->uh_uba;
	register int i;
	caddr_t addr;
	int reg, bit, byte, npf, mask, o, cmd, ubaddr;
	int bn, cn, tn, sn;

	npf = btop((rk->rkwc * sizeof(short)) + bp->b_bcount) - 1;
	reg = btop(um->um_ubinfo&0x3ffff) + npf;
	o = (int)bp->b_un.b_addr & PGOFSET;
	printf("rk%d%c: soft ecc bn%d\n", dkunit(bp),
	    'a'+(minor(bp->b_dev)&07), bp->b_blkno + npf);
	mask = rk->rkec2;
	ubapurge(um);
	i = rk->rkec1 - 1;		/* -1 makes 0 origin */
	bit = i&07;
	i = (i&~07)>>3;
	byte = i + o;
	while (i < 512 && (int)ptob(npf)+i < bp->b_bcount && bit > -11) {
		addr = ptob(ubp->uba_map[reg+btop(byte)].pg_pfnum)+
		    (byte & PGOFSET);
		putmemc(addr, getmemc(addr)^(mask<<bit));
		byte++;
		i++;
		bit -= 8;
	}
	um->um_tab.b_active++;	/* Either complete or continuing... */
	if (rk->rkwc == 0)
		return (0);
#ifdef notdef
	rk->rkcs1 |= RK_GO;
#else
	rk->rkcs1 = RK_CDT|RK_CCLR;
	rk->rkcs2 = ui->ui_slave;
	rk->rkcs1 = RK_CDT|RK_DCLR|RK_GO;
	rkwait(rk);
	bn = dkblock(bp);
	st = &rkst[ui->ui_type];
	cn = bp->b_cylin;
	sn = bn%st->nspc + npf + 1;
	tn = sn/st->nsect;
	sn %= st->nsect;
	cn += tn/st->ntrak;
	tn %= st->ntrak;
	rk->rkcyl = cn;
	rk->rkda = (tn << 8) | sn;
	ubaddr = (int)ptob(reg+1) + o;
	rk->rkba = ubaddr;
	cmd = (ubaddr >> 8) & 0x300;
	cmd |= RK_CDT|RK_IE|RK_GO|RK_READ;
	rk->rkcs1 = cmd;
#endif
	return (1);
}

rkreset(uban)
	int uban;
{
	register struct uba_minfo *um;
	register struct uba_dinfo *ui;
	register rk11, unit;

	for (rk11 = 0; rk11 < NHK; rk11++) {
		if ((um = rkminfo[rk11]) == 0 || um->um_ubanum != uban ||
		    um->um_alive == 0)
			continue;
		printf(" hk%d", rk11);
		um->um_tab.b_active = 0;
		um->um_tab.b_actf = um->um_tab.b_actl = 0;
		rk_softc[um->um_ctlr].sc_recal = 0;
		if (um->um_ubinfo) {
			printf("<%d>", (um->um_ubinfo>>28)&0xf);
			ubadone(um);
		}
		for (unit = 0; unit < NHK; unit++) {
			if ((ui = rkdinfo[unit]) == 0)
				continue;
			if (ui->ui_alive == 0)
				continue;
			rkutab[unit].b_active = 0;
			(void) rkustart(ui);
		}
		(void) rkstart(um);
	}
}

rkwatch()
{
	register struct uba_minfo *um;
	register rk11, unit;
	register struct rk_softc *sc;

	timeout(rkwatch, (caddr_t)0, hz);
	for (rk11 = 0; rk11 < NHK; rk11++) {
		um = rkminfo[rk11];
		if (um == 0 || um->um_alive == 0)
			continue;
		sc = &rk_softc[rk11];
		if (um->um_tab.b_active == 0) {
			for (unit = 0; unit < NRK; unit++)
				if (rkutab[unit].b_active &&
				    rkdinfo[unit]->ui_mi == um)
					goto active;
			sc->sc_wticks = 0;
			continue;
		}
active:
		sc->sc_wticks++;
		if (sc->sc_wticks >= 20) {
			sc->sc_wticks = 0;
			printf("hk%d: lost interrupt\n", rk11);
			ubareset(um->um_ubanum);
		}
	}
}

#define	DBSIZE	20

rkdump(dev)
	dev_t dev;
{
	struct rkdevice *rkaddr;
	char *start;
	int num, blk, unit;
	struct size *sizes;
	register struct uba_regs *uba;
	register struct uba_dinfo *ui;
	register short *rp;
	struct rkst *st;

	unit = minor(dev) >> 3;
	if (unit >= NRK)
		return (ENXIO);
#define	phys(cast, addr) ((cast)((int)addr & 0x7fffffff))
	ui = phys(struct uba_dinfo *, rkdinfo[unit]);
	if (ui->ui_alive == 0)
		return (ENXIO);
	uba = phys(struct uba_hd *, ui->ui_hd)->uh_physuba;
#if VAX780
	if (cpu == VAX_780)
		ubainit(uba);
#endif
	rkaddr = (struct rkdevice *)ui->ui_physaddr;
	num = maxfree;
	start = 0;
	rkaddr->rkcs1 = RK_CDT|RK_CERR;
	rkaddr->rkcs2 = unit;
	rkaddr->rkcs1 = RK_CDT|RK_DCLR|RK_GO;
	rkwait(rkaddr);
	if ((rkaddr->rkds & RK_VV) == 0) {
		rkaddr->rkcs1 = RK_CDT|RK_IE|RK_PACK|RK_GO;
		rkwait(rkaddr);
	}
	st = &rkst[ui->ui_type];
	sizes = phys(struct size *, st->sizes);
	if (dumplo < 0 || dumplo + num >= sizes[minor(dev)&07].nblocks)
		return (EINVAL);
	while (num > 0) {
		register struct pte *io;
		register int i;
		int cn, sn, tn;
		daddr_t bn;

		blk = num > DBSIZE ? DBSIZE : num;
		io = uba->uba_map;
		for (i = 0; i < blk; i++)
			*(int *)io++ = (btop(start)+i) | (1<<21) | UBA_MRV;
		*(int *)io = 0;
		bn = dumplo + btop(start);
		cn = bn/st->nspc + sizes[minor(dev)&07].cyloff;
		sn = bn%st->nspc;
		tn = sn/st->nsect;
		sn = sn%st->nsect;
		rkaddr->rkcyl = cn;
		rp = (short *) &rkaddr->rkda;
		*rp = (tn << 8) + sn;
		*--rp = 0;
		*--rp = -blk*NBPG / sizeof (short);
		*--rp = RK_CDT|RK_GO|RK_WRITE;
		rkwait(rkaddr);
		if (rkaddr->rkcs1 & RK_CERR)
			return (EIO);
		start += blk*NBPG;
		num -= blk;
	}
	return (0);
}
#endif
Commit	Line	Data
68347e63	1	/* rk.c 4.21 %G% */
d483c58c	2
66b4fb09	3	#include "rk.h"
872b4e09	4	#if NHK > 0
28de6ed0	5	int rkwaitdry;
d483c58c	6	/*
0801d37f	7	* RK11/RK07 disk driver
9037157b BJ	8	*
9037157b BJ	9	* This driver mimics up.c; see it for an explanation of common code.
ed687006	10	*
c9e9b65b	11	* TODO:
c9e9b65b BJ	12	* Add reading of bad sector information and disk layout from sector 1
c9e9b65b BJ	13	* Add bad sector forwarding code
736f0c13	14	* Why do we lose an interrupt sometime when spinning drives down?
d483c58c	15	*/
0801d37f	16	#define DELAY(i) { register int j; j = i; while (--j > 0); }
d483c58c BJ	17	#include "../h/param.h"
	18	#include "../h/systm.h"
	19	#include "../h/buf.h"
	20	#include "../h/conf.h"
	21	#include "../h/dir.h"
	22	#include "../h/user.h"
	23	#include "../h/pte.h"
	24	#include "../h/map.h"
0801d37f	25	#include "../h/vm.h"
d483c58c BJ	26	#include "../h/uba.h"
d483c58c BJ	27	#include "../h/dk.h"
0801d37f BJ	28	#include "../h/cpu.h"
	29	#include "../h/cmap.h"
	30
	31	#include "../h/rkreg.h"
d483c58c	32
0801d37f BJ	33	struct rk_softc {
	34	int sc_softas;
	35	int sc_ndrive;
	36	int sc_wticks;
	37	int sc_recal;
872b4e09	38	} rk_softc[NHK];
0801d37f BJ	39
0801d37f BJ	40	/* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */
c84ff1f9	41	struct size {
0801d37f	42	daddr_t nblocks;
d483c58c	43	int cyloff;
0801d37f BJ	44	} rk7_sizes[] ={
0801d37f BJ	45	15884, 0, /* A=cyl 0 thru 240 */
22717fbb BJ	46	10032, 241, /* B=cyl 241 thru 392 */
22717fbb BJ	47	53790, 0, /* C=cyl 0 thru 814 */
d483c58c BJ	48	0, 0,
	49	0, 0,
	50	0, 0,
0801d37f	51	27786, 393, /* G=cyl 393 thru 813 */
d483c58c	52	0, 0,
d483c58c	53	};
0801d37f BJ	54	/* END OF STUFF WHICH SHOULD BE READ IN PER DISK */
	55
	56	int rkprobe(), rkslave(), rkattach(), rkdgo(), rkintr();
872b4e09 BJ	57	struct uba_minfo *rkminfo[NHK];
	58	struct uba_dinfo *rkdinfo[NRK];
	59	struct uba_dinfo *rkip[NHK][4];
0801d37f BJ	60
	61	u_short rkstd[] = { 0777440, 0 };
	62	struct uba_driver hkdriver =
9037157b	63	{ rkprobe, rkslave, rkattach, rkdgo, rkstd, "rk", rkdinfo, "hk", rkminfo, 1 };
872b4e09 BJ	64	struct buf rkutab[NRK];
872b4e09 BJ	65	short rkcyl[NRK];
0801d37f BJ	66
	67	struct rkst {
	68	short nsect;
	69	short ntrak;
	70	short nspc;
	71	short ncyl;
	72	struct size *sizes;
	73	} rkst[] = {
	74	NRKSECT, NRKTRK, NRKSECT*NRKTRK, NRK7CYL, rk7_sizes,
	75	};
	76
	77	u_char rk_offset[16] =
	78	{ P400,M400,P400,M400,P800,M800,P800,M800,P1200,M1200,P1200,M1200,0,0,0,0 };
	79
872b4e09	80	struct buf rrkbuf[NRK];
0801d37f BJ	81
	82	#define b_cylin b_resid
	83
	84	#ifdef INTRLVE
	85	daddr_t dkblock();
	86	#endif
	87
	88	int rkwstart, rkwatch();
	89
	90	rkprobe(reg)
	91	caddr_t reg;
	92	{
	93	register int br, cvec;
	94
	95	#ifdef lint
	96	br = 0; cvec = br; br = cvec;
	97	#endif
	98	((struct rkdevice *)reg)->rkcs1 = RK_CDT\|RK_IE\|RK_CRDY;
	99	DELAY(10);
	100	((struct rkdevice *)reg)->rkcs1 = RK_CDT;
	101	return (1);
	102	}
	103
	104	rkslave(ui, reg)
	105	struct uba_dinfo *ui;
	106	caddr_t reg;
	107	{
	108	register struct rkdevice rkaddr = (struct rkdevice )reg;
	109
28de6ed0	110	rkaddr->rkcs1 = RK_CDT\|RK_CCLR;
0801d37f	111	rkaddr->rkcs2 = ui->ui_slave;
28de6ed0	112	rkaddr->rkcs1 = RK_CDT\|RK_SELECT\|RK_GO;
9037157b	113	rkwait(rkaddr);
28de6ed0 BJ	114	DELAY(50);
28de6ed0 BJ	115	if (rkaddr->rkcs2&RK_NED \|\| (rkaddr->rkds&RK_SVAL) == 0) {
0801d37f BJ	116	rkaddr->rkcs1 = RK_CDT\|RK_CCLR;
	117	return (0);
	118	}
	119	return (1);
	120	}
d483c58c	121
0801d37f BJ	122	rkattach(ui)
	123	register struct uba_dinfo *ui;
	124	{
	125
	126	if (rkwstart == 0) {
7780575a	127	timeout(rkwatch, (caddr_t)0, hz);
0801d37f BJ	128	rkwstart++;
	129	}
	130	if (ui->ui_dk >= 0)
7780575a	131	dk_mspw[ui->ui_dk] = 1.0 / (60 * NRKSECT * 256);
0801d37f BJ	132	rkip[ui->ui_ctlr][ui->ui_slave] = ui;
	133	rk_softc[ui->ui_ctlr].sc_ndrive++;
	134	rkcyl[ui->ui_unit] = -1;
	135	}
	136
d483c58c	137	rkstrategy(bp)
0801d37f	138	register struct buf *bp;
d483c58c	139	{
0801d37f BJ	140	register struct uba_dinfo *ui;
	141	register struct rkst *st;
	142	register int unit;
	143	register struct buf *dp;
	144	int xunit = minor(bp->b_dev) & 07;
	145	long bn, sz;
	146
	147	sz = (bp->b_bcount+511) >> 9;
	148	unit = dkunit(bp);
872b4e09	149	if (unit >= NRK)
0801d37f BJ	150	goto bad;
	151	ui = rkdinfo[unit];
	152	if (ui == 0 \|\| ui->ui_alive == 0)
	153	goto bad;
	154	st = &rkst[ui->ui_type];
	155	if (bp->b_blkno < 0 \|\|
	156	(bn = dkblock(bp))+sz > st->sizes[xunit].nblocks)
	157	goto bad;
	158	bp->b_cylin = bn/st->nspc + st->sizes[xunit].cyloff;
	159	(void) spl5();
	160	dp = &rkutab[ui->ui_unit];
	161	disksort(dp, bp);
	162	if (dp->b_active == 0) {
	163	(void) rkustart(ui);
	164	bp = &ui->ui_mi->um_tab;
	165	if (bp->b_actf && bp->b_active == 0)
	166	(void) rkstart(ui->ui_mi);
d483c58c	167	}
0801d37f BJ	168	(void) spl0();
	169	return;
	170
	171	bad:
	172	bp->b_flags \|= B_ERROR;
	173	iodone(bp);
	174	return;
d483c58c BJ	175	}
d483c58c BJ	176
0801d37f BJ	177	rkustart(ui)
	178	register struct uba_dinfo *ui;
	179	{
	180	register struct buf bp, dp;
	181	register struct uba_minfo *um;
	182	register struct rkdevice *rkaddr;
	183	register struct rkst *st;
	184	daddr_t bn;
	185	int sn, csn;
	186	int didie = 0;
	187
	188	if (ui == 0)
	189	return (0);
	190	dk_busy &= ~(1<<ui->ui_dk);
	191	dp = &rkutab[ui->ui_unit];
0801d37f	192	um = ui->ui_mi;
28de6ed0	193	rkaddr = (struct rkdevice *)um->um_addr;
0801d37f BJ	194	if (um->um_tab.b_active) {
	195	rk_softc[um->um_ctlr].sc_softas \|= 1<<ui->ui_slave;
	196	return (0);
	197	}
0801d37f BJ	198	rkaddr->rkcs1 = RK_CDT\|RK_CERR;
	199	rkaddr->rkcs2 = ui->ui_slave;
	200	rkaddr->rkcs1 = RK_CDT\|RK_SELECT\|RK_GO;
	201	rkwait(rkaddr);
736f0c13 BJ	202	if ((bp = dp->b_actf) == NULL) {
	203	rkaddr->rkcs1 = RK_CDT\|RK_DCLR\|RK_GO;
	204	rkwait(rkaddr);
	205	return (0);
	206	}
0801d37f BJ	207	if ((rkaddr->rkds & RK_VV) == 0) {
0801d37f BJ	208	/* SHOULD WARN SYSTEM THAT THIS HAPPENED */
28de6ed0	209	rkaddr->rkcs1 = RK_CDT\|RK_PACK\|RK_GO;
0801d37f	210	rkwait(rkaddr);
0801d37f	211	}
736f0c13 BJ	212	if (dp->b_active)
	213	goto done;
	214	dp->b_active = 1;
28de6ed0 BJ	215	if ((rkaddr->rkds & RK_DREADY) != RK_DREADY)
28de6ed0 BJ	216	goto done;
0801d37f BJ	217	if (rk_softc[um->um_ctlr].sc_ndrive == 1)
	218	goto done;
	219	if (bp->b_cylin == rkcyl[ui->ui_unit])
	220	goto done;
	221	rkaddr->rkcyl = bp->b_cylin;
	222	rkcyl[ui->ui_unit] = bp->b_cylin;
	223	rkaddr->rkcs1 = RK_CDT\|RK_IE\|RK_SEEK\|RK_GO;
	224	didie = 1;
	225	if (ui->ui_dk >= 0) {
	226	dk_busy \|= 1<<ui->ui_dk;
	227	dk_seek[ui->ui_dk]++;
	228	}
	229	goto out;
	230	done:
	231	if (dp->b_active != 2) {
	232	dp->b_forw = NULL;
	233	if (um->um_tab.b_actf == NULL)
	234	um->um_tab.b_actf = dp;
	235	else
	236	um->um_tab.b_actl->b_forw = dp;
	237	um->um_tab.b_actl = dp;
	238	dp->b_active = 2;
	239	}
	240	out:
	241	return (didie);
	242	}
d483c58c	243
0801d37f BJ	244	rkstart(um)
0801d37f BJ	245	register struct uba_minfo *um;
d483c58c	246	{
0801d37f BJ	247	register struct buf bp, dp;
	248	register struct uba_dinfo *ui;
	249	register struct rkdevice *rkaddr;
	250	struct rkst *st;
d483c58c	251	daddr_t bn;
0801d37f	252	int sn, tn, cmd;
28de6ed0	253	int waitdry;
0801d37f BJ	254
	255	loop:
	256	if ((dp = um->um_tab.b_actf) == NULL)
	257	return (0);
	258	if ((bp = dp->b_actf) == NULL) {
	259	um->um_tab.b_actf = dp->b_forw;
	260	goto loop;
d483c58c	261	}
0801d37f BJ	262	um->um_tab.b_active++;
	263	ui = rkdinfo[dkunit(bp)];
	264	bn = dkblock(bp);
	265	st = &rkst[ui->ui_type];
	266	sn = bn%st->nspc;
	267	tn = sn/st->nsect;
	268	sn %= st->nsect;
	269	rkaddr = (struct rkdevice *)ui->ui_addr;
	270	rkaddr->rkcs1 = RK_CDT\|RK_CERR;
	271	rkaddr->rkcs2 = ui->ui_slave;
	272	rkaddr->rkcs1 = RK_CDT\|RK_SELECT\|RK_GO;
	273	rkwait(rkaddr);
28de6ed0 BJ	274	waitdry = 0;
	275	while ((rkaddr->rkds&RK_SVAL) == 0) {
	276	if (++waitdry > 32)
	277	break;
	278	rkwaitdry++;
	279	}
	280	if ((rkaddr->rkds&RK_DREADY) != RK_DREADY) {
68347e63	281	printf("rk%d: not ready", dkunit(bp));
28de6ed0 BJ	282	if ((rkaddr->rkds&RK_DREADY) != RK_DREADY) {
	283	printf("\n");
	284	rkaddr->rkcs1 = RK_CDT\|RK_DCLR\|RK_GO;
	285	rkwait(rkaddr);
	286	rkaddr->rkcs1 = RK_CDT\|RK_CERR;
	287	rkwait(rkaddr);
	288	um->um_tab.b_active = 0;
	289	um->um_tab.b_errcnt = 0;
	290	dp->b_actf = bp->av_forw;
	291	dp->b_active = 0;
	292	bp->b_flags \|= B_ERROR;
	293	iodone(bp);
	294	goto loop;
	295	}
	296	printf(" (came back!)\n");
	297	}
0801d37f BJ	298	if (um->um_tab.b_errcnt >= 16 && (bp->b_flags&B_READ) != 0) {
	299	rkaddr->rkatt = rk_offset[um->um_tab.b_errcnt & 017];
	300	rkaddr->rkcs1 = RK_CDT\|RK_OFFSET\|RK_GO;
	301	rkwait(rkaddr);
d483c58c	302	}
0801d37f BJ	303	rkaddr->rkcyl = bp->b_cylin;
	304	rkcyl[ui->ui_unit] = bp->b_cylin;
	305	rkaddr->rkda = (tn << 8) + sn;
	306	rkaddr->rkwc = -bp->b_bcount / sizeof (short);
	307	if (bp->b_flags & B_READ)
	308	cmd = RK_CDT\|RK_IE\|RK_READ\|RK_GO;
	309	else
	310	cmd = RK_CDT\|RK_IE\|RK_WRITE\|RK_GO;
	311	um->um_cmd = cmd;
	312	ubago(ui);
	313	return (1);
d483c58c BJ	314	}
d483c58c BJ	315
0801d37f BJ	316	rkdgo(um)
0801d37f BJ	317	register struct uba_minfo *um;
d483c58c	318	{
0801d37f BJ	319	register struct rkdevice rkaddr = (struct rkdevice )um->um_addr;
	320
	321	rkaddr->rkba = um->um_ubinfo;
	322	rkaddr->rkcs1 = um->um_cmd\|((um->um_ubinfo>>8)&0x300);
	323	}
	324
443c8066	325	rkintr(rk11)
0801d37f BJ	326	int rk11;
	327	{
	328	register struct uba_minfo *um = rkminfo[rk11];
	329	register struct uba_dinfo *ui;
	330	register struct rkdevice rkaddr = (struct rkdevice )um->um_addr;
	331	register struct buf bp, dp;
	332	int unit;
	333	struct rk_softc *sc = &rk_softc[um->um_ctlr];
	334	int as = (rkaddr->rkatt >> 8) \| sc->sc_softas;
	335	int needie = 1;
	336
	337	sc->sc_wticks = 0;
	338	sc->sc_softas = 0;
	339	if (um->um_tab.b_active) {
	340	dp = um->um_tab.b_actf;
	341	bp = dp->b_actf;
	342	ui = rkdinfo[dkunit(bp)];
	343	dk_busy &= ~(1 << ui->ui_dk);
	344	if (rkaddr->rkcs1 & RK_CERR) {
	345	int recal;
	346	u_short ds = rkaddr->rkds;
	347	u_short cs2 = rkaddr->rkcs2;
	348	u_short er = rkaddr->rker;
ed687006	349	if (ds & RK_WLE) {
68347e63	350	printf("rk%d: write locked\n", dkunit(bp));
ed687006 BJ	351	bp->b_flags \|= B_ERROR;
ed687006 BJ	352	} else if (++um->um_tab.b_errcnt > 28 \|\|
736772ef	353	ds&RKDS_HARD \|\| er&RKER_HARD \|\| cs2&RKCS2_HARD) {
0801d37f	354	bp->b_flags \|= B_ERROR;
68347e63 BJ	355	harderr(bp, "rk");
68347e63 BJ	356	printf("cs2=%b ds=%b er=%b\n",
28de6ed0	357	cs2, RKCS2_BITS, ds,
736772ef BJ	358	RKDS_BITS, er, RKER_BITS);
736772ef BJ	359	} else
0801d37f	360	um->um_tab.b_active = 0;
0801d37f BJ	361	if (cs2&RK_MDS) {
	362	rkaddr->rkcs2 = RK_SCLR;
	363	goto retry;
	364	}
	365	recal = 0;
	366	if (ds&RK_DROT \|\| er&(RK_OPI\|RK_SKI\|RK_UNS) \|\|
	367	(um->um_tab.b_errcnt&07) == 4)
	368	recal = 1;
	369	if ((er & (RK_DCK\|RK_ECH)) == RK_DCK)
	370	if (rkecc(ui))
	371	return;
	372	rkaddr->rkcs1 = RK_CDT\|RK_CCLR;
	373	rkaddr->rkcs2 = ui->ui_slave;
	374	rkaddr->rkcs1 = RK_CDT\|RK_DCLR\|RK_GO;
	375	rkwait(rkaddr);
	376	if (recal && um->um_tab.b_active == 0) {
	377	rkaddr->rkcs1 = RK_CDT\|RK_IE\|RK_RECAL\|RK_GO;
	378	rkcyl[ui->ui_unit] = -1;
	379	rkwait(rkaddr);
	380	um->um_tab.b_active = 1;
	381	sc->sc_recal = 1;
	382	return;
d483c58c	383	}
d483c58c	384	}
0801d37f BJ	385	retry:
	386	if (sc->sc_recal) {
	387	sc->sc_recal = 0;
	388	um->um_tab.b_active = 0;
d483c58c	389	}
0801d37f BJ	390	ubadone(um);
	391	if (um->um_tab.b_active) {
	392	um->um_tab.b_active = 0;
	393	um->um_tab.b_errcnt = 0;
	394	um->um_tab.b_actf = dp->b_forw;
	395	dp->b_active = 0;
	396	dp->b_errcnt = 0;
	397	dp->b_actf = bp->av_forw;
	398	bp->b_resid = -rkaddr->rkwc * sizeof(short);
	399	iodone(bp);
	400	if (dp->b_actf)
	401	if (rkustart(ui))
	402	needie = 0;
d483c58c	403	}
0801d37f	404	as &= ~(1<<ui->ui_slave);
d483c58c	405	}
28de6ed0	406	att:
0801d37f BJ	407	for (unit = 0; as; as >>= 1, unit++)
	408	if (as & 1)
	409	if (rkustart(rkip[rk11][unit]))
	410	needie = 0;
	411	if (um->um_tab.b_actf && um->um_tab.b_active == 0)
	412	if (rkstart(um))
	413	needie = 0;
	414	if (needie)
	415	rkaddr->rkcs1 = RK_CDT\|RK_IE;
d483c58c BJ	416	}
d483c58c BJ	417
0801d37f BJ	418	rkwait(addr)
	419	register struct rkdevice *addr;
	420	{
	421
	422	while ((addr->rkcs1 & RK_CRDY) == 0)
	423	;
	424	}
d483c58c	425
0801d37f BJ	426	rkread(dev)
0801d37f BJ	427	dev_t dev;
d483c58c	428	{
0801d37f BJ	429	register int unit = minor(dev) >> 3;
0801d37f BJ	430
872b4e09	431	if (unit >= NRK)
0801d37f BJ	432	u.u_error = ENXIO;
	433	else
	434	physio(rkstrategy, &rrkbuf[unit], dev, B_READ, minphys);
d483c58c BJ	435	}
d483c58c BJ	436
0801d37f BJ	437	rkwrite(dev)
0801d37f BJ	438	dev_t dev;
d483c58c	439	{
0801d37f	440	register int unit = minor(dev) >> 3;
d483c58c	441
872b4e09	442	if (unit >= NRK)
0801d37f BJ	443	u.u_error = ENXIO;
	444	else
	445	physio(rkstrategy, &rrkbuf[unit], dev, B_WRITE, minphys);
d483c58c BJ	446	}
d483c58c BJ	447
0801d37f BJ	448	rkecc(ui)
0801d37f BJ	449	register struct uba_dinfo *ui;
d483c58c	450	{
0801d37f BJ	451	register struct rkdevice rk = (struct rkdevice )ui->ui_addr;
	452	register struct buf *bp = rkutab[ui->ui_unit].b_actf;
	453	register struct uba_minfo *um = ui->ui_mi;
	454	register struct rkst *st;
	455	struct uba_regs *ubp = ui->ui_hd->uh_uba;
	456	register int i;
	457	caddr_t addr;
	458	int reg, bit, byte, npf, mask, o, cmd, ubaddr;
	459	int bn, cn, tn, sn;
d483c58c	460
0801d37f BJ	461	npf = btop((rk->rkwc * sizeof(short)) + bp->b_bcount) - 1;
	462	reg = btop(um->um_ubinfo&0x3ffff) + npf;
	463	o = (int)bp->b_un.b_addr & PGOFSET;
68347e63	464	printf("rk%d%c: soft ecc bn%d\n", dkunit(bp),
c9e9b65b	465	'a'+(minor(bp->b_dev)&07), bp->b_blkno + npf);
0801d37f	466	mask = rk->rkec2;
060afaf6	467	ubapurge(um);
0801d37f BJ	468	i = rk->rkec1 - 1; /* -1 makes 0 origin */
	469	bit = i&07;
	470	i = (i&~07)>>3;
	471	byte = i + o;
	472	while (i < 512 && (int)ptob(npf)+i < bp->b_bcount && bit > -11) {
	473	addr = ptob(ubp->uba_map[reg+btop(byte)].pg_pfnum)+
	474	(byte & PGOFSET);
	475	putmemc(addr, getmemc(addr)^(mask<<bit));
	476	byte++;
	477	i++;
	478	bit -= 8;
	479	}
	480	um->um_tab.b_active++; /* Either complete or continuing... */
	481	if (rk->rkwc == 0)
	482	return (0);
9037157b BJ	483	#ifdef notdef
	484	rk->rkcs1 \|= RK_GO;
	485	#else
0801d37f BJ	486	rk->rkcs1 = RK_CDT\|RK_CCLR;
	487	rk->rkcs2 = ui->ui_slave;
	488	rk->rkcs1 = RK_CDT\|RK_DCLR\|RK_GO;
	489	rkwait(rk);
	490	bn = dkblock(bp);
	491	st = &rkst[ui->ui_type];
	492	cn = bp->b_cylin;
	493	sn = bn%st->nspc + npf + 1;
	494	tn = sn/st->nsect;
	495	sn %= st->nsect;
	496	cn += tn/st->ntrak;
	497	tn %= st->ntrak;
	498	rk->rkcyl = cn;
	499	rk->rkda = (tn << 8) \| sn;
	500	ubaddr = (int)ptob(reg+1) + o;
	501	rk->rkba = ubaddr;
	502	cmd = (ubaddr >> 8) & 0x300;
	503	cmd \|= RK_CDT\|RK_IE\|RK_GO\|RK_READ;
	504	rk->rkcs1 = cmd;
9037157b	505	#endif
0801d37f	506	return (1);
d483c58c BJ	507	}
d483c58c BJ	508
0801d37f	509	rkreset(uban)
68347e63	510	int uban;
0801d37f BJ	511	{
	512	register struct uba_minfo *um;
	513	register struct uba_dinfo *ui;
	514	register rk11, unit;
0801d37f	515
872b4e09	516	for (rk11 = 0; rk11 < NHK; rk11++) {
0801d37f BJ	517	if ((um = rkminfo[rk11]) == 0 \|\| um->um_ubanum != uban \|\|
	518	um->um_alive == 0)
	519	continue;
68347e63	520	printf(" hk%d", rk11);
0801d37f BJ	521	um->um_tab.b_active = 0;
	522	um->um_tab.b_actf = um->um_tab.b_actl = 0;
	523	rk_softc[um->um_ctlr].sc_recal = 0;
	524	if (um->um_ubinfo) {
	525	printf("<%d>", (um->um_ubinfo>>28)&0xf);
	526	ubadone(um);
	527	}
872b4e09	528	for (unit = 0; unit < NHK; unit++) {
0801d37f BJ	529	if ((ui = rkdinfo[unit]) == 0)
	530	continue;
	531	if (ui->ui_alive == 0)
	532	continue;
	533	rkutab[unit].b_active = 0;
	534	(void) rkustart(ui);
	535	}
	536	(void) rkstart(um);
	537	}
	538	}
	539
0801d37f	540	rkwatch()
d483c58c	541	{
0801d37f BJ	542	register struct uba_minfo *um;
	543	register rk11, unit;
	544	register struct rk_softc *sc;
d483c58c	545
7780575a	546	timeout(rkwatch, (caddr_t)0, hz);
872b4e09	547	for (rk11 = 0; rk11 < NHK; rk11++) {
0801d37f BJ	548	um = rkminfo[rk11];
	549	if (um == 0 \|\| um->um_alive == 0)
	550	continue;
	551	sc = &rk_softc[rk11];
	552	if (um->um_tab.b_active == 0) {
872b4e09	553	for (unit = 0; unit < NRK; unit++)
9037157b BJ	554	if (rkutab[unit].b_active &&
9037157b BJ	555	rkdinfo[unit]->ui_mi == um)
0801d37f BJ	556	goto active;
	557	sc->sc_wticks = 0;
	558	continue;
	559	}
	560	active:
	561	sc->sc_wticks++;
	562	if (sc->sc_wticks >= 20) {
	563	sc->sc_wticks = 0;
68347e63	564	printf("hk%d: lost interrupt\n", rk11);
872b4e09	565	ubareset(um->um_ubanum);
0801d37f BJ	566	}
0801d37f BJ	567	}
d483c58c	568	}
0ff318b2	569
0801d37f BJ	570	#define DBSIZE 20
	571
	572	rkdump(dev)
	573	dev_t dev;
0ff318b2	574	{
0801d37f BJ	575	struct rkdevice *rkaddr;
	576	char *start;
	577	int num, blk, unit;
	578	struct size *sizes;
	579	register struct uba_regs *uba;
	580	register struct uba_dinfo *ui;
	581	register short *rp;
	582	struct rkst *st;
	583
	584	unit = minor(dev) >> 3;
c9e9b65b BJ	585	if (unit >= NRK)
c9e9b65b BJ	586	return (ENXIO);
0801d37f BJ	587	#define phys(cast, addr) ((cast)((int)addr & 0x7fffffff))
0801d37f BJ	588	ui = phys(struct uba_dinfo *, rkdinfo[unit]);
c9e9b65b BJ	589	if (ui->ui_alive == 0)
c9e9b65b BJ	590	return (ENXIO);
0801d37f BJ	591	uba = phys(struct uba_hd *, ui->ui_hd)->uh_physuba;
	592	#if VAX780
	593	if (cpu == VAX_780)
	594	ubainit(uba);
	595	#endif
	596	rkaddr = (struct rkdevice *)ui->ui_physaddr;
	597	num = maxfree;
	598	start = 0;
	599	rkaddr->rkcs1 = RK_CDT\|RK_CERR;
	600	rkaddr->rkcs2 = unit;
	601	rkaddr->rkcs1 = RK_CDT\|RK_DCLR\|RK_GO;
	602	rkwait(rkaddr);
	603	if ((rkaddr->rkds & RK_VV) == 0) {
	604	rkaddr->rkcs1 = RK_CDT\|RK_IE\|RK_PACK\|RK_GO;
	605	rkwait(rkaddr);
	606	}
	607	st = &rkst[ui->ui_type];
	608	sizes = phys(struct size *, st->sizes);
c9e9b65b BJ	609	if (dumplo < 0 \|\| dumplo + num >= sizes[minor(dev)&07].nblocks)
c9e9b65b BJ	610	return (EINVAL);
0801d37f BJ	611	while (num > 0) {
	612	register struct pte *io;
	613	register int i;
	614	int cn, sn, tn;
	615	daddr_t bn;
0ff318b2	616
0801d37f BJ	617	blk = num > DBSIZE ? DBSIZE : num;
	618	io = uba->uba_map;
	619	for (i = 0; i < blk; i++)
	620	(int )io++ = (btop(start)+i) \| (1<<21) \| UBA_MRV;
	621	(int )io = 0;
	622	bn = dumplo + btop(start);
	623	cn = bn/st->nspc + sizes[minor(dev)&07].cyloff;
	624	sn = bn%st->nspc;
	625	tn = sn/st->nsect;
	626	sn = sn%st->nsect;
	627	rkaddr->rkcyl = cn;
	628	rp = (short *) &rkaddr->rkda;
	629	*rp = (tn << 8) + sn;
	630	*--rp = 0;
	631	--rp = -blkNBPG / sizeof (short);
	632	*--rp = RK_CDT\|RK_GO\|RK_WRITE;
	633	rkwait(rkaddr);
c9e9b65b BJ	634	if (rkaddr->rkcs1 & RK_CERR)
c9e9b65b BJ	635	return (EIO);
0801d37f BJ	636	start += blk*NBPG;
	637	num -= blk;
	638	}
	639	return (0);
0ff318b2	640	}
d483c58c	641	#endif