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BSD 4_3 release
[unix-history] / usr / src / sys / vaxuba / up.c
/*
* Copyright (c) 1982, 1986 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*
* @(#)up.c 7.1 (Berkeley) 6/5/86
*/
#include "up.h"
#if NSC > 0
/*
* UNIBUS disk driver with:
* overlapped seeks,
* ECC recovery, and
* bad sector forwarding.
*
* TODO:
* Check that offset recovery code works
*/
#include "../machine/pte.h"
#include "param.h"
#include "systm.h"
#include "dk.h"
#include "dkbad.h"
#include "buf.h"
#include "conf.h"
#include "dir.h"
#include "user.h"
#include "map.h"
#include "vm.h"
#include "cmap.h"
#include "uio.h"
#include "kernel.h"
#include "syslog.h"
#include "../vax/cpu.h"
#include "../vax/nexus.h"
#include "ubavar.h"
#include "ubareg.h"
#include "upreg.h"
struct up_softc {
int sc_softas;
int sc_ndrive;
int sc_wticks;
int sc_recal;
} up_softc[NSC];
#define upunit(dev) (minor(dev) >> 3)
/* THIS SHOULD BE READ OFF THE PACK, PER DRIVE */
struct size {
daddr_t nblocks;
int cyloff;
} up9300_sizes[8] = {
15884, 0, /* A=cyl 0 thru 26 */
33440, 27, /* B=cyl 27 thru 81 */
495520, 0, /* C=cyl 0 thru 814 */
15884, 562, /* D=cyl 562 thru 588 */
55936, 589, /* E=cyl 589 thru 680 */
81376, 681, /* F=cyl 681 thru 814 */
153728, 562, /* G=cyl 562 thru 814 */
291346, 82, /* H=cyl 82 thru 561 */
}, up9766_sizes[8] = {
15884, 0, /* A=cyl 0 thru 26 */
33440, 27, /* B=cyl 27 thru 81 */
500384, 0, /* C=cyl 0 thru 822 */
15884, 562, /* D=cyl 562 thru 588 */
55936, 589, /* E=cyl 589 thru 680 */
86240, 681, /* F=cyl 681 thru 822 */
158592, 562, /* G=cyl 562 thru 822 */
291346, 82, /* H=cyl 82 thru 561 */
}, up160_sizes[8] = {
15884, 0, /* A=cyl 0 thru 49 */
33440, 50, /* B=cyl 50 thru 154 */
263360, 0, /* C=cyl 0 thru 822 */
15884, 155, /* D=cyl 155 thru 204 */
55936, 205, /* E=cyl 205 thru 379 */
141664, 380, /* F=cyl 380 thru 822 */
213664, 155, /* G=cyl 155 thru 822 */
0, 0,
}, upam_sizes[8] = {
15884, 0, /* A=cyl 0 thru 31 */
33440, 32, /* B=cyl 32 thru 97 */
524288, 0, /* C=cyl 0 thru 1023 */
15884, 668, /* D=cyl 668 thru 699 */
55936, 700, /* E=cyl 700 thru 809 */
109472, 810, /* F=cyl 810 thru 1023 */
182176, 668, /* G=cyl 668 thru 1023 */
291346, 98, /* H=cyl 98 thru 667 */
}, up980_sizes[8] = {
15884, 0, /* A=cyl 0 thru 99 */
33440, 100, /* B=cyl 100 thru 308 */
131680, 0, /* C=cyl 0 thru 822 */
15884, 309, /* D=cyl 309 thru 408 */
55936, 409, /* E=cyl 409 thru 758 */
10080, 759, /* F=cyl 759 thru 822 */
82080, 309, /* G=cyl 309 thru 822 */
0, 0,
}, upeagle_sizes[8] = {
15884, 0, /* A=cyl 0 thru 16 */
66880, 17, /* B=cyl 17 thru 86 */
808320, 0, /* C=cyl 0 thru 841 */
15884, 391, /* D=cyl 391 thru 407 */
307200, 408, /* E=cyl 408 thru 727 */
109296, 728, /* F=cyl 728 thru 841 */
432816, 391, /* G=cyl 391 thru 841 */
291346, 87, /* H=cyl 87 thru 390 */
};
/* END OF STUFF WHICH SHOULD BE READ IN PER DISK */
int upprobe(), upslave(), upattach(), updgo(), upintr();
struct uba_ctlr *upminfo[NSC];
struct uba_device *updinfo[NUP];
#define UPIPUNITS 8
struct uba_device *upip[NSC][UPIPUNITS]; /* fuji w/fixed head gives n,n+4 */
u_short upstd[] = { 0776700, 0774400, 0776300, 0 };
struct uba_driver scdriver =
{ upprobe, upslave, upattach, updgo, upstd, "up", updinfo, "sc", upminfo };
struct buf uputab[NUP];
char upinit[NUP];
struct upst {
short nsect; /* # sectors/track */
short ntrak; /* # tracks/cylinder */
short nspc; /* # sectors/cylinder */
short ncyl; /* # cylinders */
struct size *sizes; /* partition tables */
short sdist; /* seek distance metric */
short rdist; /* rotational distance metric */
} upst[] = {
{ 32, 19, 32*19, 815, up9300_sizes, 3, 4 }, /* 9300 */
{ 32, 19, 32*19, 823, up9766_sizes, 3, 4 }, /* 9766 */
{ 32, 10, 32*10, 823, up160_sizes, 3, 4 }, /* fuji 160m */
{ 32, 16, 32*16, 1024, upam_sizes, 7, 8 }, /* Capricorn */
{ 32, 5, 32*5, 823, up980_sizes, 3, 4 }, /* DM980 */
{ 48, 20, 48*20, 842, upeagle_sizes, 15, 8 }, /* EAGLE */
{ 0, 0, 0, 0, 0, 0, 0 }
};
u_char up_offset[16] = {
UPOF_P400, UPOF_M400, UPOF_P400, UPOF_M400,
UPOF_P800, UPOF_M800, UPOF_P800, UPOF_M800,
UPOF_P1200, UPOF_M1200, UPOF_P1200, UPOF_M1200,
0, 0, 0, 0
};
struct buf rupbuf[NUP];
struct buf bupbuf[NUP];
struct dkbad upbad[NUP];
#define b_cylin b_resid
int upwstart, upwatch(); /* Have started guardian */
int upseek;
int upwaitdry;
/*ARGSUSED*/
upprobe(reg)
caddr_t reg;
{
register int br, cvec;
#ifdef lint
br = 0; cvec = br; br = cvec; upintr(0);
#endif
((struct updevice *)reg)->upcs1 = UP_IE|UP_RDY;
DELAY(10);
((struct updevice *)reg)->upcs1 = 0;
return (sizeof (struct updevice));
}
upslave(ui, reg)
struct uba_device *ui;
caddr_t reg;
{
register struct updevice *upaddr = (struct updevice *)reg;
upaddr->upcs1 = 0; /* conservative */
upaddr->upcs2 = ui->ui_slave;
upaddr->upcs1 = UP_NOP|UP_GO;
if (upaddr->upcs2&UPCS2_NED) {
upaddr->upcs1 = UP_DCLR|UP_GO;
return (0);
}
return (1);
}
upattach(ui)
register struct uba_device *ui;
{
if (upwstart == 0) {
timeout(upwatch, (caddr_t)0, hz);
upwstart++;
}
if (ui->ui_dk >= 0)
dk_mspw[ui->ui_dk] = .0000020345;
upip[ui->ui_ctlr][ui->ui_slave] = ui;
up_softc[ui->ui_ctlr].sc_ndrive++;
ui->ui_type = upmaptype(ui);
}
upmaptype(ui)
register struct uba_device *ui;
{
register struct updevice *upaddr = (struct updevice *)ui->ui_addr;
int type = ui->ui_type;
register struct upst *st;
upaddr->upcs1 = 0;
upaddr->upcs2 = ui->ui_slave;
upaddr->uphr = UPHR_MAXTRAK;
for (st = upst; st->nsect != 0; st++)
if (upaddr->uphr == st->ntrak - 1) {
type = st - upst;
break;
}
if (st->nsect == 0)
printf("up%d: uphr=%x\n", ui->ui_slave, upaddr->uphr);
if (type == 0) {
upaddr->uphr = UPHR_MAXCYL;
if (upaddr->uphr == 822)
type++;
}
upaddr->upcs2 = UPCS2_CLR;
return (type);
}
upopen(dev)
dev_t dev;
{
register int unit = upunit(dev);
register struct uba_device *ui;
if (unit >= NUP || (ui = updinfo[unit]) == 0 || ui->ui_alive == 0)
return (ENXIO);
return (0);
}
upstrategy(bp)
register struct buf *bp;
{
register struct uba_device *ui;
register struct upst *st;
register int unit;
register struct buf *dp;
int xunit = minor(bp->b_dev) & 07;
long bn, sz;
int s;
sz = (bp->b_bcount+511) >> 9;
unit = upunit(bp->b_dev);
if (unit >= NUP) {
bp->b_error = ENXIO;
goto bad;
}
ui = updinfo[unit];
if (ui == 0 || ui->ui_alive == 0) {
bp->b_error = ENXIO;
goto bad;
}
st = &upst[ui->ui_type];
if (bp->b_blkno < 0 ||
(bn = bp->b_blkno)+sz > st->sizes[xunit].nblocks) {
if (bp->b_blkno == st->sizes[xunit].nblocks) {
bp->b_resid = bp->b_bcount;
goto done;
}
bp->b_error = EINVAL;
goto bad;
}
bp->b_cylin = bn/st->nspc + st->sizes[xunit].cyloff;
s = spl5();
dp = &uputab[ui->ui_unit];
disksort(dp, bp);
if (dp->b_active == 0) {
(void) upustart(ui);
bp = &ui->ui_mi->um_tab;
if (bp->b_actf && bp->b_active == 0)
(void) upstart(ui->ui_mi);
}
splx(s);
return;
bad:
bp->b_flags |= B_ERROR;
done:
iodone(bp);
return;
}
/*
* Unit start routine.
* Seek the drive to be where the data is
* and then generate another interrupt
* to actually start the transfer.
* If there is only one drive on the controller,
* or we are very close to the data, don't
* bother with the search. If called after
* searching once, don't bother to look where
* we are, just queue for transfer (to avoid
* positioning forever without transferrring.)
*/
upustart(ui)
register struct uba_device *ui;
{
register struct buf *bp, *dp;
register struct uba_ctlr *um;
register struct updevice *upaddr;
register struct upst *st;
daddr_t bn;
int sn, csn;
/*
* The SC21 cancels commands if you just say
* cs1 = UP_IE
* so we are cautious about handling of cs1.
* Also don't bother to clear as bits other than in upintr().
*/
int didie = 0;
if (ui == 0)
return (0);
um = ui->ui_mi;
dk_busy &= ~(1<<ui->ui_dk);
dp = &uputab[ui->ui_unit];
if ((bp = dp->b_actf) == NULL)
goto out;
/*
* If the controller is active, just remember
* that this device would like to be positioned...
* if we tried to position now we would confuse the SC21.
*/
if (um->um_tab.b_active) {
up_softc[um->um_ctlr].sc_softas |= 1<<ui->ui_slave;
return (0);
}
/*
* If we have already positioned this drive,
* then just put it on the ready queue.
*/
if (dp->b_active)
goto done;
dp->b_active = 1;
upaddr = (struct updevice *)um->um_addr;
upaddr->upcs2 = ui->ui_slave;
/*
* If drive has just come up,
* setup the pack.
*/
if ((upaddr->upds & UPDS_VV) == 0 || upinit[ui->ui_unit] == 0) {
struct buf *bbp = &bupbuf[ui->ui_unit];
/* SHOULD WARN SYSTEM THAT THIS HAPPENED */
upinit[ui->ui_unit] = 1;
upaddr->upcs1 = UP_IE|UP_DCLR|UP_GO;
upaddr->upcs1 = UP_IE|UP_PRESET|UP_GO;
upaddr->upof = UPOF_FMT22;
didie = 1;
st = &upst[ui->ui_type];
bbp->b_flags = B_READ|B_BUSY;
bbp->b_dev = bp->b_dev;
bbp->b_bcount = 512;
bbp->b_un.b_addr = (caddr_t)&upbad[ui->ui_unit];
bbp->b_blkno = st->ncyl * st->nspc - st->nsect;
bbp->b_cylin = st->ncyl - 1;
dp->b_actf = bbp;
bbp->av_forw = bp;
bp = bbp;
}
/*
* If drive is offline, forget about positioning.
*/
if ((upaddr->upds & (UPDS_DPR|UPDS_MOL)) != (UPDS_DPR|UPDS_MOL))
goto done;
/*
* If there is only one drive,
* dont bother searching.
*/
if (up_softc[um->um_ctlr].sc_ndrive == 1)
goto done;
/*
* Figure out where this transfer is going to
* and see if we are close enough to justify not searching.
*/
st = &upst[ui->ui_type];
bn = bp->b_blkno;
sn = bn%st->nspc;
sn = (sn + st->nsect - st->sdist) % st->nsect;
if (bp->b_cylin - upaddr->updc)
goto search; /* Not on-cylinder */
else if (upseek)
goto done; /* Ok just to be on-cylinder */
csn = (upaddr->upla>>6) - sn - 1;
if (csn < 0)
csn += st->nsect;
if (csn > st->nsect - st->rdist)
goto done;
search:
upaddr->updc = bp->b_cylin;
/*
* Not on cylinder at correct position,
* seek/search.
*/
if (upseek)
upaddr->upcs1 = UP_IE|UP_SEEK|UP_GO;
else {
upaddr->upda = sn;
upaddr->upcs1 = UP_IE|UP_SEARCH|UP_GO;
}
didie = 1;
/*
* Mark unit busy for iostat.
*/
if (ui->ui_dk >= 0) {
dk_busy |= 1<<ui->ui_dk;
dk_seek[ui->ui_dk]++;
}
goto out;
done:
/*
* Device is ready to go.
* Put it on the ready queue for the controller
* (unless its already there.)
*/
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);
}
/*
* Start up a transfer on a drive.
*/
upstart(um)
register struct uba_ctlr *um;
{
register struct buf *bp, *dp;
register struct uba_device *ui;
register struct updevice *upaddr;
struct upst *st;
daddr_t bn;
int dn, sn, tn, cmd, waitdry;
loop:
/*
* Pull a request off the controller queue
*/
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;
}
/*
* Mark controller busy, and
* determine destination of this request.
*/
um->um_tab.b_active++;
ui = updinfo[upunit(bp->b_dev)];
bn = bp->b_blkno;
dn = ui->ui_slave;
st = &upst[ui->ui_type];
sn = bn%st->nspc;
tn = sn/st->nsect;
sn %= st->nsect;
upaddr = (struct updevice *)ui->ui_addr;
/*
* Select drive if not selected already.
*/
if ((upaddr->upcs2&07) != dn)
upaddr->upcs2 = dn;
/*
* Check that it is ready and online
*/
waitdry = 0;
while ((upaddr->upds&UPDS_DRY) == 0) {
printf("up%d: ds wait ds=%o\n",upunit(bp->b_dev),upaddr->upds);
if (++waitdry > 512)
break;
upwaitdry++;
}
if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) {
printf("up%d: not ready", upunit(bp->b_dev));
if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) {
printf("\n");
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;
}
/*
* Oh, well, sometimes this
* happens, for reasons unknown.
*/
printf(" (flakey)\n");
}
/*
* Setup for the transfer, and get in the
* UNIBUS adaptor queue.
*/
upaddr->updc = bp->b_cylin;
upaddr->upda = (tn << 8) + sn;
upaddr->upwc = -bp->b_bcount / sizeof (short);
if (bp->b_flags & B_READ)
cmd = UP_IE|UP_RCOM|UP_GO;
else
cmd = UP_IE|UP_WCOM|UP_GO;
um->um_cmd = cmd;
(void) ubago(ui);
return (1);
}
/*
* Now all ready to go, stuff the registers.
*/
updgo(um)
struct uba_ctlr *um;
{
register struct updevice *upaddr = (struct updevice *)um->um_addr;
um->um_tab.b_active = 2; /* should now be 2 */
upaddr->upba = um->um_ubinfo;
upaddr->upcs1 = um->um_cmd|((um->um_ubinfo>>8)&0x300);
}
/*
* Handle a disk interrupt.
*/
upintr(sc21)
register sc21;
{
register struct buf *bp, *dp;
register struct uba_ctlr *um = upminfo[sc21];
register struct uba_device *ui;
register struct updevice *upaddr = (struct updevice *)um->um_addr;
register unit;
struct up_softc *sc = &up_softc[um->um_ctlr];
int as = (upaddr->upas & 0377) | sc->sc_softas;
int needie = 1, waitdry;
sc->sc_wticks = 0;
sc->sc_softas = 0;
/*
* If controller wasn't transferring, then this is an
* interrupt for attention status on seeking drives.
* Just service them.
*/
if (um->um_tab.b_active != 2 && !sc->sc_recal) {
if (upaddr->upcs1 & UP_TRE)
upaddr->upcs1 = UP_TRE;
goto doattn;
}
um->um_tab.b_active = 1;
/*
* Get device and block structures, and a pointer
* to the uba_device for the drive. Select the drive.
*/
dp = um->um_tab.b_actf;
bp = dp->b_actf;
ui = updinfo[upunit(bp->b_dev)];
dk_busy &= ~(1 << ui->ui_dk);
if ((upaddr->upcs2&07) != ui->ui_slave)
upaddr->upcs2 = ui->ui_slave;
if (bp->b_flags&B_BAD) {
if (upecc(ui, CONT))
return;
}
/*
* Check for and process errors on
* either the drive or the controller.
*/
if ((upaddr->upds&UPDS_ERR) || (upaddr->upcs1&UP_TRE)) {
waitdry = 0;
while ((upaddr->upds & UPDS_DRY) == 0) {
if (++waitdry > 512)
break;
upwaitdry++;
}
if (upaddr->uper1&UPER1_WLE) {
/*
* Give up on write locked devices
* immediately.
*/
printf("up%d: write locked\n", upunit(bp->b_dev));
bp->b_flags |= B_ERROR;
} else if (++um->um_tab.b_errcnt > 27) {
/*
* After 28 retries (16 without offset, and
* 12 with offset positioning) give up.
* If the error was header CRC, the header is
* screwed up, and the sector may in fact exist
* in the bad sector table, better check...
*/
if (upaddr->uper1&UPER1_HCRC) {
if (upecc(ui, BSE))
return;
}
hard:
harderr(bp, "up");
printf("cn=%d tn=%d sn=%d cs2=%b er1=%b er2=%b\n",
upaddr->updc, ((upaddr->upda)>>8)&077,
(upaddr->upda)&037,
upaddr->upcs2, UPCS2_BITS,
upaddr->uper1, UPER1_BITS,
upaddr->uper2, UPER2_BITS);
bp->b_flags |= B_ERROR;
} else if (upaddr->uper2 & UPER2_BSE) {
if (upecc(ui, BSE))
return;
else
goto hard;
} else {
/*
* Retriable error.
* If a soft ecc, correct it (continuing
* by returning if necessary.
* Otherwise fall through and retry the transfer
*/
if ((upaddr->uper1&(UPER1_DCK|UPER1_ECH))==UPER1_DCK) {
if (upecc(ui, ECC))
return;
} else
um->um_tab.b_active = 0; /* force retry */
}
/*
* Clear drive error and, every eight attempts,
* (starting with the fourth)
* recalibrate to clear the slate.
*/
upaddr->upcs1 = UP_TRE|UP_IE|UP_DCLR|UP_GO;
needie = 0;
if ((um->um_tab.b_errcnt&07) == 4 && um->um_tab.b_active == 0) {
upaddr->upcs1 = UP_RECAL|UP_IE|UP_GO;
sc->sc_recal = 0;
goto nextrecal;
}
}
/*
* Advance recalibration finite state machine
* if recalibrate in progress, through
* RECAL
* SEEK
* OFFSET (optional)
* RETRY
*/
switch (sc->sc_recal) {
case 1:
upaddr->updc = bp->b_cylin;
upaddr->upcs1 = UP_SEEK|UP_IE|UP_GO;
goto nextrecal;
case 2:
if (um->um_tab.b_errcnt < 16 || (bp->b_flags&B_READ) == 0)
goto donerecal;
upaddr->upof = up_offset[um->um_tab.b_errcnt & 017] | UPOF_FMT22;
upaddr->upcs1 = UP_IE|UP_OFFSET|UP_GO;
goto nextrecal;
nextrecal:
sc->sc_recal++;
um->um_tab.b_active = 1;
return;
donerecal:
case 3:
sc->sc_recal = 0;
um->um_tab.b_active = 0;
break;
}
/*
* If still ``active'', then don't need any more retries.
*/
if (um->um_tab.b_active) {
/*
* If we were offset positioning,
* return to centerline.
*/
if (um->um_tab.b_errcnt >= 16) {
upaddr->upof = UPOF_FMT22;
upaddr->upcs1 = UP_RTC|UP_GO|UP_IE;
while (upaddr->upds & UPDS_PIP)
DELAY(25);
needie = 0;
}
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 = (-upaddr->upwc * sizeof(short));
iodone(bp);
/*
* If this unit has more work to do,
* then start it up right away.
*/
if (dp->b_actf)
if (upustart(ui))
needie = 0;
}
as &= ~(1<<ui->ui_slave);
/*
* Release unibus resources and flush data paths.
*/
ubadone(um);
doattn:
/*
* Process other units which need attention.
* For each unit which needs attention, call
* the unit start routine to place the slave
* on the controller device queue.
*/
while (unit = ffs((long)as)) {
unit--; /* was 1 origin */
as &= ~(1<<unit);
upaddr->upas = 1<<unit;
if (unit < UPIPUNITS && upustart(upip[sc21][unit]))
needie = 0;
}
/*
* If the controller is not transferring, but
* there are devices ready to transfer, start
* the controller.
*/
if (um->um_tab.b_actf && um->um_tab.b_active == 0)
if (upstart(um))
needie = 0;
if (needie)
upaddr->upcs1 = UP_IE;
}
upread(dev, uio)
dev_t dev;
struct uio *uio;
{
register int unit = upunit(dev);
if (unit >= NUP)
return (ENXIO);
return (physio(upstrategy, &rupbuf[unit], dev, B_READ, minphys, uio));
}
upwrite(dev, uio)
dev_t dev;
struct uio *uio;
{
register int unit = upunit(dev);
if (unit >= NUP)
return (ENXIO);
return (physio(upstrategy, &rupbuf[unit], dev, B_WRITE, minphys, uio));
}
/*
* Correct an ECC error, and restart the i/o to complete
* the transfer if necessary. This is quite complicated because
* the transfer may be going to an odd memory address base and/or
* across a page boundary.
*/
upecc(ui, flag)
register struct uba_device *ui;
int flag;
{
register struct updevice *up = (struct updevice *)ui->ui_addr;
register struct buf *bp = uputab[ui->ui_unit].b_actf;
register struct uba_ctlr *um = ui->ui_mi;
register struct upst *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 is the number of sectors transferred before the sector
* containing the ECC error, and reg is the UBA register
* mapping (the first part of) the transfer.
* O is offset within a memory page of the first byte transferred.
*/
if (flag == CONT)
npf = bp->b_error;
else
npf = btodb(bp->b_bcount + (up->upwc * sizeof(short)) + 511);
reg = btop(um->um_ubinfo&0x3ffff) + npf;
o = (int)bp->b_un.b_addr & PGOFSET;
mask = up->upec2;
#ifdef UPECCDEBUG
printf("npf %d reg %x o %d mask %o pos %d\n", npf, reg, o, mask,
up->upec1);
#endif
bn = bp->b_blkno;
st = &upst[ui->ui_type];
cn = bp->b_cylin;
sn = bn%st->nspc + npf;
tn = sn/st->nsect;
sn %= st->nsect;
cn += tn/st->ntrak;
tn %= st->ntrak;
ubapurge(um);
um->um_tab.b_active=2;
/*
* action taken depends on the flag
*/
switch(flag){
case ECC:
npf--;
reg--;
mask = up->upec2;
log(LOG_WARNING, "up%d%c: soft ecc sn%d\n", upunit(bp->b_dev),
'a'+(minor(bp->b_dev)&07), bp->b_blkno + npf);
/*
* Flush the buffered data path, and 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 = up->upec1 - 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)dbtob(npf)+i < bp->b_bcount && bit > -11) {
struct pte pte;
pte = ubp->uba_map[reg + btop(byte)];
addr = ptob(pte.pg_pfnum) + (byte & PGOFSET);
#ifdef UPECCDEBUG
printf("addr %x map reg %x\n",
addr, *(int *)(&ubp->uba_map[reg+btop(byte)]));
printf("old: %x, ", getmemc(addr));
#endif
putmemc(addr, getmemc(addr)^(mask<<bit));
#ifdef UPECCDEBUG
printf("new: %x\n", getmemc(addr));
#endif
byte++;
i++;
bit -= 8;
}
if (up->upwc == 0)
return (0);
npf++;
reg++;
break;
case BSE:
/*
* if not in bad sector table, return 0
*/
if ((bn = isbad(&upbad[ui->ui_unit], cn, tn, sn)) < 0)
return(0);
/*
* flag this one as bad
*/
bp->b_flags |= B_BAD;
bp->b_error = npf + 1;
#ifdef UPECCDEBUG
printf("BSE: restart at %d\n",npf+1);
#endif
bn = st->ncyl * st->nspc -st->nsect - 1 - bn;
cn = bn / st->nspc;
sn = bn % st->nspc;
tn = sn / st->nsect;
sn %= st->nsect;
up->upwc = -(512 / sizeof (short));
#ifdef UPECCDEBUG
printf("revector to cn %d tn %d sn %d\n", cn, tn, sn);
#endif
break;
case CONT:
#ifdef UPECCDEBUG
printf("upecc, CONT: bn %d cn %d tn %d sn %d\n", bn, cn, tn, sn);
#endif
bp->b_flags &= ~B_BAD;
if ((int)dbtob(npf) >= bp->b_bcount)
return (0);
up->upwc = -((bp->b_bcount - (int)dbtob(npf)) / sizeof(short));
break;
}
if (up->upwc == 0) {
um->um_tab.b_active = 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 sectors of the transfer already;
* restart at offset o of next sector (i.e. in UBA register reg+1).
*/
#ifdef notdef
up->uper1 = 0;
up->upcs1 |= UP_GO;
#else
up->upcs1 = UP_TRE|UP_IE|UP_DCLR|UP_GO;
up->updc = cn;
up->upda = (tn << 8) | sn;
ubaddr = (int)ptob(reg) + o;
up->upba = ubaddr;
cmd = (ubaddr >> 8) & 0x300;
cmd |= ((bp->b_flags&B_READ)?UP_RCOM:UP_WCOM)|UP_IE|UP_GO;
um->um_tab.b_errcnt = 0;
up->upcs1 = cmd;
#endif
return (1);
}
/*
* Reset driver after UBA init.
* Cancel software state of all pending transfers
* and restart all units and the controller.
*/
upreset(uban)
int uban;
{
register struct uba_ctlr *um;
register struct uba_device *ui;
register sc21, unit;
for (sc21 = 0; sc21 < NSC; sc21++) {
if ((um = upminfo[sc21]) == 0 || um->um_ubanum != uban ||
um->um_alive == 0)
continue;
printf(" sc%d", sc21);
um->um_tab.b_active = 0;
um->um_tab.b_actf = um->um_tab.b_actl = 0;
up_softc[sc21].sc_recal = 0;
up_softc[sc21].sc_wticks = 0;
if (um->um_ubinfo) {
printf("<%d>", (um->um_ubinfo>>28)&0xf);
um->um_ubinfo = 0;
}
((struct updevice *)(um->um_addr))->upcs2 = UPCS2_CLR;
for (unit = 0; unit < NUP; unit++) {
if ((ui = updinfo[unit]) == 0)
continue;
if (ui->ui_alive == 0 || ui->ui_mi != um)
continue;
uputab[unit].b_active = 0;
(void) upustart(ui);
}
(void) upstart(um);
}
}
/*
* Wake up every second and if an interrupt is pending
* but nothing has happened increment a counter.
* If nothing happens for 20 seconds, reset the UNIBUS
* and begin anew.
*/
upwatch()
{
register struct uba_ctlr *um;
register sc21, unit;
register struct up_softc *sc;
timeout(upwatch, (caddr_t)0, hz);
for (sc21 = 0; sc21 < NSC; sc21++) {
um = upminfo[sc21];
if (um == 0 || um->um_alive == 0)
continue;
sc = &up_softc[sc21];
if (um->um_tab.b_active == 0) {
for (unit = 0; unit < NUP; unit++)
if (uputab[unit].b_active &&
updinfo[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("sc%d: lost interrupt\n", sc21);
ubareset(um->um_ubanum);
}
}
}
#define DBSIZE 20
updump(dev)
dev_t dev;
{
struct updevice *upaddr;
char *start;
int num, blk, unit;
struct size *sizes;
register struct uba_regs *uba;
register struct uba_device *ui;
register short *rp;
struct upst *st;
register int retry;
unit = upunit(dev);
if (unit >= NUP)
return (ENXIO);
#define phys(cast, addr) ((cast)((int)addr & 0x7fffffff))
ui = phys(struct uba_device *, updinfo[unit]);
if (ui->ui_alive == 0)
return (ENXIO);
uba = phys(struct uba_hd *, ui->ui_hd)->uh_physuba;
ubainit(uba);
upaddr = (struct updevice *)ui->ui_physaddr;
DELAY(5000000);
num = maxfree;
upaddr->upcs2 = unit;
DELAY(100);
upaddr->upcs1 = UP_DCLR|UP_GO;
upaddr->upcs1 = UP_PRESET|UP_GO;
upaddr->upof = UPOF_FMT22;
retry = 0;
do {
DELAY(25);
if (++retry > 527)
break;
} while ((upaddr->upds & UP_RDY) == 0);
if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY)
return (EFAULT);
start = 0;
st = &upst[ui->ui_type];
sizes = phys(struct size *, st->sizes);
if (dumplo < 0)
return (EINVAL);
if (dumplo + num >= sizes[minor(dev)&07].nblocks)
num = sizes[minor(dev)&07].nblocks - dumplo;
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) | UBAMR_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;
upaddr->updc = cn;
rp = (short *) &upaddr->upda;
*rp = (tn << 8) + sn;
*--rp = 0;
*--rp = -blk*NBPG / sizeof (short);
*--rp = UP_GO|UP_WCOM;
retry = 0;
do {
DELAY(25);
if (++retry > 527)
break;
} while ((upaddr->upcs1 & UP_RDY) == 0);
if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) {
printf("up%d: not ready", unit);
if ((upaddr->upds & UPDS_DREADY) != UPDS_DREADY) {
printf("\n");
return (EIO);
}
printf(" (flakey)\n");
}
if (upaddr->upds&UPDS_ERR)
return (EIO);
start += blk*NBPG;
num -= blk;
}
return (0);
}
upsize(dev)
dev_t dev;
{
int unit = upunit(dev);
struct uba_device *ui;
struct upst *st;
if (unit >= NUP || (ui = updinfo[unit]) == 0 || ui->ui_alive == 0)
return (-1);
st = &upst[ui->ui_type];
return (st->sizes[minor(dev) & 07].nblocks);
}
#endif
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.