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first working vorsion
[unix-history] / usr / src / sys / vax / mba / hp.c
/* hp.c 4.7 81/02/08 */
#include "hp.h"
#if NHP > 0
/*
* RP/RM disk driver
*/
#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 */
};
int hp_offset[16] = {
P400, M400, P400, M400,
P800, M800, P800, M800,
P1200, M1200, P1200, M1200,
0, 0, 0, 0,
};
struct buf rhpbuf;
#define b_cylin b_resid
#ifdef INTRLVE
daddr_t dkblock();
#endif
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->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 device *hpaddr = (struct device *)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&DVA) == 0)
return (MBU_BUSY);
if ((hpaddr->hpds & VV) == 0) {
hpaddr->hpcs1 = DCLR|GO;
hpaddr->hpcs1 = PRESET|GO;
hpaddr->hpof = FMT22;
}
if (mi->mi_tab.b_active)
return (MBU_DODATA);
if ((hpaddr->hpds & (DPR|MOL)) != (DPR|MOL))
return (MBU_DODATA);
hpaddr->hpdc = bp->b_cylin;
flags = mi->mi_hd->mh_flags;
if (flags&MH_NOSEEK)
return (MBU_DODATA);
if (bp->b_cylin == (hpaddr->hpdc & 0xffff)) {
if (flags&MH_NOSEARCH)
return (MBU_DODATA);
bn = dkblock(bp);
st = &hpst[mi->mi_type];
sn = bn%st->nspc;
sn = (sn+st->nsect-hpSDIST)%st->nsect;
dist = ((hpaddr->hpla & 0xffff)>>6) - st->nsect + 1;
if (dist < 0)
dist += st->nsect;
if (dist > st->nsect - hpRDIST)
return (MBU_DODATA);
}
if (flags&MH_NOSEARCH)
hpaddr->hpcs1 = SEEK|GO;
else {
hpaddr->hpda = sn;
hpaddr->hpcs1 = SEARCH|GO;
}
return (MBU_STARTED);
}
hpstart(mi)
register struct mba_info *mi;
{
register struct device *hpaddr = (struct device *)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 = 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] | FMT22;
hpaddr->hpcs1 = OFFSET|GO;
while (hpaddr->hpds & PIP)
;
mbclrattn(mi);
}
hpaddr->hpdc = bp->b_cylin;
hpaddr->hpda = (tn << 8) + sn;
}
hpdtint(mi, mbastat)
register struct mba_info *mi;
int mbastat;
{
register struct device *hpaddr = (struct device *)mi->mi_drv;
register struct buf *bp = mi->mi_tab.b_actf;
while ((hpaddr->hpds & DRY) == 0) /* shouldn't happen */
printf("hp dry not set\n");
if (hpaddr->hpds & ERR || mbastat & MBAEBITS)
if (++mi->mi_tab.b_errcnt < 28 && (hpaddr->hper1&WLE) == 0) {
if ((hpaddr->hper1&0xffff) != DCK) {
hpaddr->hpcs1 = DCLR|GO;
if ((mi->mi_tab.b_errcnt&07) == 4) {
hpaddr->hpcs1 = RECAL|GO;
while (hpaddr->hpds & PIP)
;
mbclrattn(mi);
}
return (MBD_RETRY);
} else if (hpecc(mi))
return (MBD_RESTARTED);
} else {
deverror(bp, mbastat, hpaddr->hper1);
bp->b_flags |= B_ERROR;
}
bp->b_resid = -(mi->mi_mba->mba_bcr) & 0xffff;
if (mi->mi_tab.b_errcnt) {
hpaddr->hpcs1 = RTC|GO;
while (hpaddr->hpds & PIP)
;
mbclrattn(mi);
}
hpaddr->hpcs1 = RELEASE|GO;
return (MBD_DONE);
}
hpread(dev)
{
physio(hpstrategy, &rhpbuf, dev, B_READ, minphys);
}
hpwrite(dev)
{
physio(hpstrategy, &rhpbuf, dev, B_WRITE, minphys);
}
hpecc(mi)
register struct mba_info *mi;
{
register struct mba_regs *mbp = mi->mi_mba;
register struct device *rp = (struct device *)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;
/*
* Npf is the number of sectors transferred before the sector
* containing the ECC error, and reg is the MBA register
* mapping (the first part of)the transfer.
* O is offset within a memory page of the first byte transferred.
*/
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 = FMT22;
return (0);
}
/*
* Compute the byte and bit position of the error.
* The variable i is the byte offset in the transfer,
* the variable byte is the offset from a page boundary
* in main memory.
*/
i = (rp->hpec1&0xffff) - 1; /* -1 makes 0 origin */
bit = i&07;
i = (i&~07)>>3;
byte = i + o;
/*
* Correct while possible bits remain of mask. Since mask
* contains 11 bits, we continue while the bit offset is > -11.
* Also watch out for end of this block and the end of the whole
* transfer.
*/
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);
/*
* Have to continue the transfer... clear the drive,
* and compute the position where the transfer is to continue.
* We have completed npf+1 sectores of the transfer already;
* restart at offset o of next sector (i.e. in MBA register reg+1).
*/
rp->hpcs1 = DCLR|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 = RCOM|GO;
return (1);
}
#define DBSIZE 20
hpdump(dev)
dev_t dev;
{
register struct mba_info *mi;
register struct mba_regs *mba;
struct device *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->mi_alive == 0) {
printf("dna\n");
return (-1);
}
mba = phys(mi->mi_hd, struct mba_hd *)->mh_physmba;
mba->mba_cr = MBAINIT;
hpaddr = (struct device *)&mba->mba_drv[mi->mi_drive];
if ((hpaddr->hpds & VV) == 0) {
hpaddr->hpcs1 = DCLR|GO;
hpaddr->hpcs1 = PRESET|GO;
hpaddr->hpof = 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 = WCOM | GO;
while ((hpaddr->hpds & DRY) == 0)
;
if (hpaddr->hpds&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);
}
hpdkinit()
{
/* I don't really care what this does .. kre */
}
#endif
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.