usr/src/sys/vax/mba/hp.c

/*	hp.c	4.14	81/02/25	*/

#include "hp.h"
#if NHP > 0
/*
 * HP disk driver for RP0x+RM0x
 */

#include "../h/param.h"
#include "../h/systm.h"
#include "../h/dk.h"
#include "../h/buf.h"
#include "../h/conf.h"
#include "../h/dir.h"
#include "../h/user.h"
#include "../h/map.h"
#include "../h/pte.h"
#include "../h/mba.h"
#include "../h/mtpr.h"
#include "../h/vm.h"
#include "../h/cmap.h"

#include "../h/hpreg.h"

/* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */
struct	size {
	daddr_t	nblocks;
	int	cyloff;
} hp_sizes[8] = {
	15884,	0,		/* A=cyl 0 thru 37 */
	33440,	38,		/* B=cyl 38 thru 117 */
	340670,	0,		/* C=cyl 0 thru 814 */
	0,	0,
	0,	0,
	0,	0,
	291346,	118,		/* G=cyl 118 thru 814 */
	0,	0,
}, rm_sizes[8] = {
	15884,	0,		/* A=cyl 0 thru 99 */
	33440,	100,		/* B=cyl 100 thru 309 */
	131680,	0,		/* C=cyl 0 thru 822 */
	2720,	291,
	0,	0,
	0,	0,
	82080,	310,		/* G=cyl 310 thru 822 */
	0,	0,
}, rm5_sizes[8] = {
	15884,	0,		/* A=cyl 0 thru 26 */
	33440,	27,		/* B=cyl 27 thru 81 */
	500992,	0,		/* C=cyl 0 thru 823 */
	15884,	562,		/* D=cyl 562 thru 588 */
	55936,	589,		/* E=cyl 589 thru 680 */
	86944,	681,		/* F=cyl 681 thru 823 */
	159296,	562,		/* G=cyl 562 thru 823 */
	291346,	82,		/* H=cyl 82 thru 561 */
}, rm80_sizes[8] = {
	15884,	0,		/* A=cyl 0 thru 36 */
	33440,	37,		/* B=cyl 37 thru 114 */
	242606,	0,		/* C=cyl 0 thru 558 */
	0,	0,
	0,	0,
	0,	0,
	82080,	115,		/* G=cyl 115 thru 304 */
	110236,	305,		/* H=cyl 305 thru 558 */
};
/* END OF STUFF WHICH SHOULD BE READ IN PER DISK */

#define	_hpSDIST	2
#define	_hpRDIST	3

int	hpSDIST = _hpSDIST;
int	hpRDIST = _hpRDIST;

short	hptypes[] =
	{ MBDT_RM03, MBDT_RM05, MBDT_RP06, MBDT_RM80, 0 };
struct	mba_info *hpinfo[NHP];
int	hpdkinit(),hpustart(),hpstart(),hpdtint();
struct	mba_driver hpdriver =
	{ hpdkinit, hpustart, hpstart, hpdtint, 0, hptypes, hpinfo };

struct hpst {
	short	nsect;
	short	ntrak;
	short	nspc;
	short	ncyl;
	struct	size *sizes;
} hpst[] = {
	32,	5,	32*5,	823,	rm_sizes,	/* RM03 */
	32,	19,	32*19,	823,	rm5_sizes,	/* RM05 */
	22,	19,	22*19,	815,	hp_sizes,	/* RP06 */
	31,	14, 	31*14,	559,	rm80_sizes	/* RM80 */
};

u_char	hp_offset[16] = {
    HP_P400, HP_M400, HP_P400, HP_M400, HP_P800, HP_M800, HP_P800, HP_M800,
    HP_P1200, HP_M1200, HP_P1200, HP_M1200, 0, 0, 0, 0,
};

struct	buf	rhpbuf[NHP];

#define	b_cylin b_resid

#ifdef INTRLVE
daddr_t dkblock();
#endif

int	hpseek;

hpdkinit(mi)
	struct mba_info *mi;
{
	register struct hpst *st = &hpst[mi->mi_type];

	if (mi->mi_dk >= 0)
		dk_mspw[mi->mi_dk] = 1.0 / HZ / (st->nsect * 256);
}

hpstrategy(bp)
	register struct buf *bp;
{
	register struct mba_info *mi;
	register struct hpst *st;
	register int unit;
	long sz, bn;
	int xunit = minor(bp->b_dev) & 07;

	sz = bp->b_bcount;
	sz = (sz+511) >> 9;
	unit = dkunit(bp);
	if (unit >= NHP)
		goto bad;
	mi = hpinfo[unit];
	if (mi == 0 || mi->mi_alive == 0)
		goto bad;
	st = &hpst[mi->mi_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();
	disksort(&mi->mi_tab, bp);
	if (mi->mi_tab.b_active == 0)
		mbustart(mi);
	(void) spl0();
	return;

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

hpustart(mi)
	register struct mba_info *mi;
{
	register struct hpdevice *hpaddr = (struct hpdevice *)mi->mi_drv;
	register struct buf *bp = mi->mi_tab.b_actf;
	register struct hpst *st;
	daddr_t bn;
	int sn, dist, flags;

	if ((hpaddr->hpcs1&HP_DVA) == 0)
		return (MBU_BUSY);
	if ((hpaddr->hpds & HP_VV) == 0) {
		hpaddr->hpcs1 = HP_DCLR|HP_GO;
		hpaddr->hpcs1 = HP_PRESET|HP_GO;
		hpaddr->hpof = HP_FMT22;
	}
	if (mi->mi_tab.b_active || mi->mi_hd->mh_ndrive == 1)
		return (MBU_DODATA);
	if ((hpaddr->hpds & (HP_DPR|HP_MOL)) != (HP_DPR|HP_MOL))
		return (MBU_DODATA);
	st = &hpst[mi->mi_type];
	bn = dkblock(bp);
	sn = bn%st->nspc;
	sn = (sn+st->nsect-hpSDIST)%st->nsect;
	if (bp->b_cylin == (hpaddr->hpdc & 0xffff)) {
		if (hpseek)
			return (MBU_DODATA);
		dist = ((hpaddr->hpla & 0xffff)>>6) - st->nsect + 1;
		if (dist < 0)
			dist += st->nsect;
		if (dist > st->nsect - hpRDIST)
			return (MBU_DODATA);
	} else
		hpaddr->hpdc = bp->b_cylin;
	if (hpseek)
		hpaddr->hpcs1 = HP_SEEK|HP_GO;
	else {
		hpaddr->hpda = sn;
		hpaddr->hpcs1 = HP_SEARCH|HP_GO;
	}
	return (MBU_STARTED);
}

hpstart(mi)
	register struct mba_info *mi;
{
	register struct hpdevice *hpaddr = (struct hpdevice *)mi->mi_drv;
	register struct buf *bp = mi->mi_tab.b_actf;
	register struct hpst *st = &hpst[mi->mi_type];
	daddr_t bn;
	int sn, tn;

	bn = dkblock(bp);
	sn = bn%st->nspc;
	tn = sn/st->nsect;
	sn %= st->nsect;
	if (mi->mi_tab.b_errcnt >= 16 && (bp->b_flags&B_READ) != 0) {
		hpaddr->hpof = hp_offset[mi->mi_tab.b_errcnt & 017] | HP_FMT22;
		hpaddr->hpcs1 = HP_OFFSET|HP_GO;
		while (hpaddr->hpds & HP_PIP)
			;
		mbclrattn(mi);
	}
	hpaddr->hpdc = bp->b_cylin;
	hpaddr->hpda = (tn << 8) + sn;
}

hpdtint(mi, mbasr)
	register struct mba_info *mi;
	int mbasr;
{
	register struct hpdevice *hpaddr = (struct hpdevice *)mi->mi_drv;
	register struct buf *bp = mi->mi_tab.b_actf;

	while ((hpaddr->hpds & HP_DRY) == 0)	/* shouldn't happen */
		printf("hp dry not set\n");
	if (hpaddr->hpds & HP_ERR || mbasr & MBAEBITS)
		if (++mi->mi_tab.b_errcnt < 28 && (hpaddr->hper1&HP_WLE) == 0) {
			if ((hpaddr->hper1&0xffff) != HP_DCK) {
				hpaddr->hpcs1 = HP_DCLR|HP_GO;
				if ((mi->mi_tab.b_errcnt&07) == 4) {
					hpaddr->hpcs1 = HP_RECAL|HP_GO;
					while (hpaddr->hpds & HP_PIP)
						;
					mbclrattn(mi);
				}
				return (MBD_RETRY);
			} else if (hpecc(mi))
				return (MBD_RESTARTED);
		} else {
			if (hpaddr->hper1&HP_WLE)
				printf("hp%d is write locked\n", dkunit(bp));
			else
		harderr(bp);
		printf("hp%d mbasr %b er1 %b er2 %b\n",
				    dkunit(bp), mbasr, mbasr_bits,
				    hpaddr->hper1, HPER1_BITS,
				    hpaddr->hper2, HPER2_BITS);
			hpaddr->hpcs1 = HP_DCLR|HP_GO;
			bp->b_flags |= B_ERROR;
		}
	bp->b_resid = -(mi->mi_mba->mba_bcr) & 0xffff;
	if (mi->mi_tab.b_errcnt) {
		hpaddr->hpcs1 = HP_RTC|HP_GO;
		while (hpaddr->hpds & HP_PIP)
			;
		mbclrattn(mi);
	}
	hpaddr->hpcs1 = HP_RELEASE|HP_GO;
	return (MBD_DONE);
}

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

	if (unit >= NHP)
		u.u_error = ENXIO;
	else
		physio(hpstrategy, &rhpbuf[unit], dev, B_READ, minphys);
}

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

	if (unit >= NHP)
		u.u_error = ENXIO;
	else
		physio(hpstrategy, &rhpbuf[unit], dev, B_WRITE, minphys);
}

hpecc(mi)
	register struct mba_info *mi;
{
	register struct mba_regs *mbp = mi->mi_mba;
	register struct hpdevice *rp = (struct hpdevice *)mi->mi_drv;
	register struct buf *bp = mi->mi_tab.b_actf;
	register struct hpst *st;
	register int i;
	caddr_t addr;
	int reg, bit, byte, npf, mask, o;
	int bn, cn, tn, sn;
	struct pte mpte;
	int bcr;

	bcr = mbp->mba_bcr & 0xffff;
	if (bcr)
		bcr |= 0xffff0000;		/* sxt */
	npf = btop(bcr + bp->b_bcount) - 1;
	reg = npf;
	o = (int)bp->b_un.b_addr & PGOFSET;
	printf("%D ", bp->b_blkno + npf);
	prdev("ECC", bp->b_dev);
	mask = rp->hpec2&0xffff;
	if (mask == 0) {
		rp->hpof = HP_FMT22;
		return (0);
	}

	i = (rp->hpec1&0xffff) - 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) {
		mpte = mbp->mba_map[reg+btop(byte)];
		addr = ptob(mpte.pg_pfnum) + (byte & PGOFSET);
		putmemc(addr, getmemc(addr)^(mask<<bit));
		byte++;
		i++;
		bit -= 8;
	}
	mi->mi_hd->mh_active++;		/* Either complete or continuing */
	if (bcr == 0)
		return (0);
#ifdef notdef
	rp->hper1 = 0;
	rp->hpcs1 = HP_RCOM|HP_GO;
#else
	rp->hpcs1 = HP_DCLR|HP_GO;
	bn = dkblock(bp);
	st = &hpst[mi->mi_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;
	rp->hpdc = cn;
	rp->hpda = (tn<<8) + sn;
	mbp->mba_sr = -1;
	mbp->mba_var = (int)ptob(reg+1) + o;
	rp->hpcs1 = HP_RCOM|HP_GO;
#endif
	return (1);
}

#define	DBSIZE	20

hpdump(dev)
	dev_t dev;
{
	register struct mba_info *mi;
	register struct mba_regs *mba;
	struct hpdevice *hpaddr;
	char *start;
	int num, unit;
	register struct hpst *st;

	num = maxfree;
	start = 0;
	unit = minor(dev) >> 3;
	if (unit >= NHP) {
		printf("bad unit\n");
		return (-1);
	}
#define	phys(a,b)	((b)((int)(a)&0x7fffffff))
	mi = phys(hpinfo[unit],struct mba_info *);
	if (mi == 0 || mi->mi_alive == 0) {
		printf("dna\n");
		return (-1);
	}
	mba = phys(mi->mi_hd, struct mba_hd *)->mh_physmba;
	mba->mba_cr = MBAINIT;
	hpaddr = (struct hpdevice *)&mba->mba_drv[mi->mi_drive];
	if ((hpaddr->hpds & HP_VV) == 0) {
		hpaddr->hpcs1 = HP_DCLR|HP_GO;
		hpaddr->hpcs1 = HP_PRESET|HP_GO;
		hpaddr->hpof = HP_FMT22;
	}
	st = &hpst[mi->mi_type];
	if (dumplo < 0 || dumplo + num >= st->sizes[minor(dev)&07].nblocks) {
		printf("oor\n");
		return (-1);
	}
	while (num > 0) {
		register struct pte *hpte = mba->mba_map;
		register int i;
		int blk, cn, sn, tn;
		daddr_t bn;

		blk = num > DBSIZE ? DBSIZE : num;
		bn = dumplo + btop(start);
		cn = bn/st->nspc + st->sizes[minor(dev)&07].cyloff;
		sn = bn%st->nspc;
		tn = sn/st->nsect;
		sn = sn%st->nsect;
		hpaddr->hpdc = cn;
		hpaddr->hpda = (tn << 8) + sn;
		for (i = 0; i < blk; i++)
			*(int *)hpte++ = (btop(start)+i) | PG_V;
		mba->mba_sr = -1;
		mba->mba_bcr = -(blk*NBPG);
		mba->mba_var = 0;
		hpaddr->hpcs1 = HP_WCOM | HP_GO;
		while ((hpaddr->hpds & HP_DRY) == 0)
			;
		if (hpaddr->hpds&HP_ERR) {
			printf("dskerr: (%d,%d,%d) ds=%x er=%x\n",
			    cn, tn, sn, hpaddr->hpds, hpaddr->hper1);
			return (-1);
		}
		start += blk*NBPG;
		num -= blk;
	}
	return (0);
}
#endif
Commit	Line	Data
	1	/* hp.c 4.14 81/02/25 */
	2
	3	#include "hp.h"
	4	#if NHP > 0
	5	/*
	6	* HP disk driver for RP0x+RM0x
	7	*/
	8
	9	#include "../h/param.h"
	10	#include "../h/systm.h"
	11	#include "../h/dk.h"
	12	#include "../h/buf.h"
	13	#include "../h/conf.h"
	14	#include "../h/dir.h"
	15	#include "../h/user.h"
	16	#include "../h/map.h"
	17	#include "../h/pte.h"
	18	#include "../h/mba.h"
	19	#include "../h/mtpr.h"
	20	#include "../h/vm.h"
	21	#include "../h/cmap.h"
	22
	23	#include "../h/hpreg.h"
	24
	25	/* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */
	26	struct size {
	27	daddr_t nblocks;
	28	int cyloff;
	29	} hp_sizes[8] = {
	30	15884, 0, /* A=cyl 0 thru 37 */
	31	33440, 38, /* B=cyl 38 thru 117 */
	32	340670, 0, /* C=cyl 0 thru 814 */
	33	0, 0,
	34	0, 0,
	35	0, 0,
	36	291346, 118, /* G=cyl 118 thru 814 */
	37	0, 0,
	38	}, rm_sizes[8] = {
	39	15884, 0, /* A=cyl 0 thru 99 */
	40	33440, 100, /* B=cyl 100 thru 309 */
	41	131680, 0, /* C=cyl 0 thru 822 */
	42	2720, 291,
	43	0, 0,
	44	0, 0,
	45	82080, 310, /* G=cyl 310 thru 822 */
	46	0, 0,
	47	}, rm5_sizes[8] = {
	48	15884, 0, /* A=cyl 0 thru 26 */
	49	33440, 27, /* B=cyl 27 thru 81 */
	50	500992, 0, /* C=cyl 0 thru 823 */
	51	15884, 562, /* D=cyl 562 thru 588 */
	52	55936, 589, /* E=cyl 589 thru 680 */
	53	86944, 681, /* F=cyl 681 thru 823 */
	54	159296, 562, /* G=cyl 562 thru 823 */
	55	291346, 82, /* H=cyl 82 thru 561 */
	56	}, rm80_sizes[8] = {
	57	15884, 0, /* A=cyl 0 thru 36 */
	58	33440, 37, /* B=cyl 37 thru 114 */
	59	242606, 0, /* C=cyl 0 thru 558 */
	60	0, 0,
	61	0, 0,
	62	0, 0,
	63	82080, 115, /* G=cyl 115 thru 304 */
	64	110236, 305, /* H=cyl 305 thru 558 */
	65	};
	66	/* END OF STUFF WHICH SHOULD BE READ IN PER DISK */
	67
	68	#define _hpSDIST 2
	69	#define _hpRDIST 3
	70
	71	int hpSDIST = _hpSDIST;
	72	int hpRDIST = _hpRDIST;
	73
	74	short hptypes[] =
	75	{ MBDT_RM03, MBDT_RM05, MBDT_RP06, MBDT_RM80, 0 };
	76	struct mba_info *hpinfo[NHP];
	77	int hpdkinit(),hpustart(),hpstart(),hpdtint();
	78	struct mba_driver hpdriver =
	79	{ hpdkinit, hpustart, hpstart, hpdtint, 0, hptypes, hpinfo };
	80
	81	struct hpst {
	82	short nsect;
	83	short ntrak;
	84	short nspc;
	85	short ncyl;
	86	struct size *sizes;
	87	} hpst[] = {
	88	32, 5, 325, 823, rm_sizes, / RM03 */
	89	32, 19, 3219, 823, rm5_sizes, / RM05 */
	90	22, 19, 2219, 815, hp_sizes, / RP06 */
	91	31, 14, 3114, 559, rm80_sizes / RM80 */
	92	};
	93
	94	u_char hp_offset[16] = {
	95	HP_P400, HP_M400, HP_P400, HP_M400, HP_P800, HP_M800, HP_P800, HP_M800,
	96	HP_P1200, HP_M1200, HP_P1200, HP_M1200, 0, 0, 0, 0,
	97	};
	98
	99	struct buf rhpbuf[NHP];
	100
	101	#define b_cylin b_resid
	102
	103	#ifdef INTRLVE
	104	daddr_t dkblock();
	105	#endif
	106
	107	int hpseek;
	108
	109	hpdkinit(mi)
	110	struct mba_info *mi;
	111	{
	112	register struct hpst *st = &hpst[mi->mi_type];
	113
	114	if (mi->mi_dk >= 0)
	115	dk_mspw[mi->mi_dk] = 1.0 / HZ / (st->nsect * 256);
	116	}
	117
	118	hpstrategy(bp)
	119	register struct buf *bp;
	120	{
	121	register struct mba_info *mi;
	122	register struct hpst *st;
	123	register int unit;
	124	long sz, bn;
	125	int xunit = minor(bp->b_dev) & 07;
	126
	127	sz = bp->b_bcount;
	128	sz = (sz+511) >> 9;
	129	unit = dkunit(bp);
	130	if (unit >= NHP)
	131	goto bad;
	132	mi = hpinfo[unit];
	133	if (mi == 0 \|\| mi->mi_alive == 0)
	134	goto bad;
	135	st = &hpst[mi->mi_type];
	136	if (bp->b_blkno < 0 \|\|
	137	(bn = dkblock(bp))+sz > st->sizes[xunit].nblocks)
	138	goto bad;
	139	bp->b_cylin = bn/st->nspc + st->sizes[xunit].cyloff;
	140	(void) spl5();
	141	disksort(&mi->mi_tab, bp);
	142	if (mi->mi_tab.b_active == 0)
	143	mbustart(mi);
	144	(void) spl0();
	145	return;
	146
	147	bad:
	148	bp->b_flags \|= B_ERROR;
	149	iodone(bp);
	150	return;
	151	}
	152
	153	hpustart(mi)
	154	register struct mba_info *mi;
	155	{
	156	register struct hpdevice hpaddr = (struct hpdevice )mi->mi_drv;
	157	register struct buf *bp = mi->mi_tab.b_actf;
	158	register struct hpst *st;
	159	daddr_t bn;
	160	int sn, dist, flags;
	161
	162	if ((hpaddr->hpcs1&HP_DVA) == 0)
	163	return (MBU_BUSY);
	164	if ((hpaddr->hpds & HP_VV) == 0) {
	165	hpaddr->hpcs1 = HP_DCLR\|HP_GO;
	166	hpaddr->hpcs1 = HP_PRESET\|HP_GO;
	167	hpaddr->hpof = HP_FMT22;
	168	}
	169	if (mi->mi_tab.b_active \|\| mi->mi_hd->mh_ndrive == 1)
	170	return (MBU_DODATA);
	171	if ((hpaddr->hpds & (HP_DPR\|HP_MOL)) != (HP_DPR\|HP_MOL))
	172	return (MBU_DODATA);
	173	st = &hpst[mi->mi_type];
	174	bn = dkblock(bp);
	175	sn = bn%st->nspc;
	176	sn = (sn+st->nsect-hpSDIST)%st->nsect;
	177	if (bp->b_cylin == (hpaddr->hpdc & 0xffff)) {
	178	if (hpseek)
	179	return (MBU_DODATA);
	180	dist = ((hpaddr->hpla & 0xffff)>>6) - st->nsect + 1;
	181	if (dist < 0)
	182	dist += st->nsect;
	183	if (dist > st->nsect - hpRDIST)
	184	return (MBU_DODATA);
	185	} else
	186	hpaddr->hpdc = bp->b_cylin;
	187	if (hpseek)
	188	hpaddr->hpcs1 = HP_SEEK\|HP_GO;
	189	else {
	190	hpaddr->hpda = sn;
	191	hpaddr->hpcs1 = HP_SEARCH\|HP_GO;
	192	}
	193	return (MBU_STARTED);
	194	}
	195
	196	hpstart(mi)
	197	register struct mba_info *mi;
	198	{
	199	register struct hpdevice hpaddr = (struct hpdevice )mi->mi_drv;
	200	register struct buf *bp = mi->mi_tab.b_actf;
	201	register struct hpst *st = &hpst[mi->mi_type];
	202	daddr_t bn;
	203	int sn, tn;
	204
	205	bn = dkblock(bp);
	206	sn = bn%st->nspc;
	207	tn = sn/st->nsect;
	208	sn %= st->nsect;
	209	if (mi->mi_tab.b_errcnt >= 16 && (bp->b_flags&B_READ) != 0) {
	210	hpaddr->hpof = hp_offset[mi->mi_tab.b_errcnt & 017] \| HP_FMT22;
	211	hpaddr->hpcs1 = HP_OFFSET\|HP_GO;
	212	while (hpaddr->hpds & HP_PIP)
	213	;
	214	mbclrattn(mi);
	215	}
	216	hpaddr->hpdc = bp->b_cylin;
	217	hpaddr->hpda = (tn << 8) + sn;
	218	}
	219
	220	hpdtint(mi, mbasr)
	221	register struct mba_info *mi;
	222	int mbasr;
	223	{
	224	register struct hpdevice hpaddr = (struct hpdevice )mi->mi_drv;
	225	register struct buf *bp = mi->mi_tab.b_actf;
	226
	227	while ((hpaddr->hpds & HP_DRY) == 0) /* shouldn't happen */
	228	printf("hp dry not set\n");
	229	if (hpaddr->hpds & HP_ERR \|\| mbasr & MBAEBITS)
	230	if (++mi->mi_tab.b_errcnt < 28 && (hpaddr->hper1&HP_WLE) == 0) {
	231	if ((hpaddr->hper1&0xffff) != HP_DCK) {
	232	hpaddr->hpcs1 = HP_DCLR\|HP_GO;
	233	if ((mi->mi_tab.b_errcnt&07) == 4) {
	234	hpaddr->hpcs1 = HP_RECAL\|HP_GO;
	235	while (hpaddr->hpds & HP_PIP)
	236	;
	237	mbclrattn(mi);
	238	}
	239	return (MBD_RETRY);
	240	} else if (hpecc(mi))
	241	return (MBD_RESTARTED);
	242	} else {
	243	if (hpaddr->hper1&HP_WLE)
	244	printf("hp%d is write locked\n", dkunit(bp));
	245	else
	246	harderr(bp);
	247	printf("hp%d mbasr %b er1 %b er2 %b\n",
	248	dkunit(bp), mbasr, mbasr_bits,
	249	hpaddr->hper1, HPER1_BITS,
	250	hpaddr->hper2, HPER2_BITS);
	251	hpaddr->hpcs1 = HP_DCLR\|HP_GO;
	252	bp->b_flags \|= B_ERROR;
	253	}
	254	bp->b_resid = -(mi->mi_mba->mba_bcr) & 0xffff;
	255	if (mi->mi_tab.b_errcnt) {
	256	hpaddr->hpcs1 = HP_RTC\|HP_GO;
	257	while (hpaddr->hpds & HP_PIP)
	258	;
	259	mbclrattn(mi);
	260	}
	261	hpaddr->hpcs1 = HP_RELEASE\|HP_GO;
	262	return (MBD_DONE);
	263	}
	264
	265	hpread(dev)
	266	dev_t dev;
	267	{
	268	register int unit = minor(dev) >> 3;
	269
	270	if (unit >= NHP)
	271	u.u_error = ENXIO;
	272	else
	273	physio(hpstrategy, &rhpbuf[unit], dev, B_READ, minphys);
	274	}
	275
	276	hpwrite(dev)
	277	dev_t dev;
	278	{
	279	register int unit = minor(dev) >> 3;
	280
	281	if (unit >= NHP)
	282	u.u_error = ENXIO;
	283	else
	284	physio(hpstrategy, &rhpbuf[unit], dev, B_WRITE, minphys);
	285	}
	286
	287	hpecc(mi)
	288	register struct mba_info *mi;
	289	{
	290	register struct mba_regs *mbp = mi->mi_mba;
	291	register struct hpdevice rp = (struct hpdevice )mi->mi_drv;
	292	register struct buf *bp = mi->mi_tab.b_actf;
	293	register struct hpst *st;
	294	register int i;
	295	caddr_t addr;
	296	int reg, bit, byte, npf, mask, o;
	297	int bn, cn, tn, sn;
	298	struct pte mpte;
	299	int bcr;
	300
	301	bcr = mbp->mba_bcr & 0xffff;
	302	if (bcr)
	303	bcr \|= 0xffff0000; /* sxt */
	304	npf = btop(bcr + bp->b_bcount) - 1;
	305	reg = npf;
	306	o = (int)bp->b_un.b_addr & PGOFSET;
	307	printf("%D ", bp->b_blkno + npf);
	308	prdev("ECC", bp->b_dev);
	309	mask = rp->hpec2&0xffff;
	310	if (mask == 0) {
	311	rp->hpof = HP_FMT22;
	312	return (0);
	313	}
	314
	315	i = (rp->hpec1&0xffff) - 1; /* -1 makes 0 origin */
	316	bit = i&07;
	317	i = (i&~07)>>3;
	318	byte = i + o;
	319	while (i < 512 && (int)ptob(npf)+i < bp->b_bcount && bit > -11) {
	320	mpte = mbp->mba_map[reg+btop(byte)];
	321	addr = ptob(mpte.pg_pfnum) + (byte & PGOFSET);
	322	putmemc(addr, getmemc(addr)^(mask<<bit));
	323	byte++;
	324	i++;
	325	bit -= 8;
	326	}
	327	mi->mi_hd->mh_active++; /* Either complete or continuing */
	328	if (bcr == 0)
	329	return (0);
	330	#ifdef notdef
	331	rp->hper1 = 0;
	332	rp->hpcs1 = HP_RCOM\|HP_GO;
	333	#else
	334	rp->hpcs1 = HP_DCLR\|HP_GO;
	335	bn = dkblock(bp);
	336	st = &hpst[mi->mi_type];
	337	cn = bp->b_cylin;
	338	sn = bn%(st->nspc) + npf + 1;
	339	tn = sn/st->nsect;
	340	sn %= st->nsect;
	341	cn += tn/st->ntrak;
	342	tn %= st->ntrak;
	343	rp->hpdc = cn;
	344	rp->hpda = (tn<<8) + sn;
	345	mbp->mba_sr = -1;
	346	mbp->mba_var = (int)ptob(reg+1) + o;
	347	rp->hpcs1 = HP_RCOM\|HP_GO;
	348	#endif
	349	return (1);
	350	}
	351
	352	#define DBSIZE 20
	353
	354	hpdump(dev)
	355	dev_t dev;
	356	{
	357	register struct mba_info *mi;
	358	register struct mba_regs *mba;
	359	struct hpdevice *hpaddr;
	360	char *start;
	361	int num, unit;
	362	register struct hpst *st;
	363
	364	num = maxfree;
	365	start = 0;
	366	unit = minor(dev) >> 3;
	367	if (unit >= NHP) {
	368	printf("bad unit\n");
	369	return (-1);
	370	}
	371	#define phys(a,b) ((b)((int)(a)&0x7fffffff))
	372	mi = phys(hpinfo[unit],struct mba_info *);
	373	if (mi == 0 \|\| mi->mi_alive == 0) {
	374	printf("dna\n");
	375	return (-1);
	376	}
	377	mba = phys(mi->mi_hd, struct mba_hd *)->mh_physmba;
	378	mba->mba_cr = MBAINIT;
	379	hpaddr = (struct hpdevice *)&mba->mba_drv[mi->mi_drive];
	380	if ((hpaddr->hpds & HP_VV) == 0) {
	381	hpaddr->hpcs1 = HP_DCLR\|HP_GO;
	382	hpaddr->hpcs1 = HP_PRESET\|HP_GO;
	383	hpaddr->hpof = HP_FMT22;
	384	}
	385	st = &hpst[mi->mi_type];
	386	if (dumplo < 0 \|\| dumplo + num >= st->sizes[minor(dev)&07].nblocks) {
	387	printf("oor\n");
	388	return (-1);
	389	}
	390	while (num > 0) {
	391	register struct pte *hpte = mba->mba_map;
	392	register int i;
	393	int blk, cn, sn, tn;
	394	daddr_t bn;
	395
	396	blk = num > DBSIZE ? DBSIZE : num;
	397	bn = dumplo + btop(start);
	398	cn = bn/st->nspc + st->sizes[minor(dev)&07].cyloff;
	399	sn = bn%st->nspc;
	400	tn = sn/st->nsect;
	401	sn = sn%st->nsect;
	402	hpaddr->hpdc = cn;
	403	hpaddr->hpda = (tn << 8) + sn;
	404	for (i = 0; i < blk; i++)
	405	(int )hpte++ = (btop(start)+i) \| PG_V;
	406	mba->mba_sr = -1;
	407	mba->mba_bcr = -(blk*NBPG);
	408	mba->mba_var = 0;
	409	hpaddr->hpcs1 = HP_WCOM \| HP_GO;
	410	while ((hpaddr->hpds & HP_DRY) == 0)
	411	;
	412	if (hpaddr->hpds&HP_ERR) {
	413	printf("dskerr: (%d,%d,%d) ds=%x er=%x\n",
	414	cn, tn, sn, hpaddr->hpds, hpaddr->hper1);
	415	return (-1);
	416	}
	417	start += blk*NBPG;
	418	num -= blk;
	419	}
	420	return (0);
	421	}
	422	#endif