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BSD 4_3_Net_2 release
[unix-history] / usr / src / sys / i386 / stand / wd.c
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)wd.c 7.3 (Berkeley) 5/4/91
*/
/* device driver for winchester disk */
#include "param.h"
#include "dkbad.h"
#include "disklabel.h"
#include "i386/isa/isa.h"
#include "i386/isa/wdreg.h"
#include "saio.h"
#define NWD 2 /* number of hard disk units supported, max 2 */
#define RETRIES 5 /* number of retries before giving up */
int noretries, wdquiet;
/*#define WDDEBUG*/
#ifdef SMALL
extern struct disklabel disklabel;
#else
struct disklabel wdsizes[NWD];
#endif
extern cyloffset ; /* bootstrap's idea of cylinder for disklabel */
/*
* Record for the bad block forwarding code.
* This is initialized to be empty until the bad-sector table
* is read from the disk.
*/
#define TRKSEC(trk,sec) ((trk << 8) + sec)
struct dkbad dkbad[NWD];
static wdcport;
wdopen(io)
register struct iob *io;
{
register struct disklabel *dd;
#ifdef WDDEBUG
printf("wdopen ");
#endif
#ifdef SMALL
dd = &disklabel;
#else
dd = &wdsizes[io->i_unit];
if (io->i_part > 8)
_stop("Invalid partition number");
if(io->i_ctlr > 1)
_stop("Invalid controller number");
#endif
if (wdinit(io))
_stop("wd initialization error");
io->i_boff = dd->d_partitions[io->i_part].p_offset ;
return(0);
}
wdstrategy(io,func)
register struct iob *io;
{
register int iosize; /* number of sectors to do IO for this loop */
register daddr_t sector;
int nblocks, cyloff;
int unit, partition;
char *address;
register struct disklabel *dd;
unit = io->i_unit;
partition = io->i_part;
#ifdef WDDEBUG
printf("wdstrat %d %d ", unit, partition);
#endif
#ifdef SMALL
dd = &disklabel;
#else
dd = &wdsizes[unit];
#endif
iosize = io->i_cc / dd->d_secsize;
/*
* Convert PGSIZE "blocks" to sectors.
* Note: doing the conversions this way limits the partition size
* to about 8 million sectors (1-8 Gb).
*/
sector = (unsigned long) io->i_bn * DEV_BSIZE / dd->d_secsize;
nblocks = dd->d_partitions[partition].p_size;
#ifndef SMALL
if (iosize < 0 || sector + iosize > nblocks || sector < 0) {
#ifdef WDDEBUG
printf("bn = %d; sectors = %d; partition = %d; fssize = %d\n",
io->i_bn, iosize, partition, nblocks);
#endif
printf("wdstrategy - I/O out of filesystem boundaries\n");
return(-1);
}
if (io->i_bn * DEV_BSIZE % dd->d_secsize) {
printf("wdstrategy - transfer starts in midsector\n");
return(-1);
}
if (io->i_cc % dd->d_secsize) {
printf("wd: transfer of partial sector\n");
return(-1);
}
#endif
address = io->i_ma;
while (iosize > 0) {
if (wdio(func, unit, sector, address))
return(-1);
iosize--;
sector++;
address += dd->d_secsize;
}
return(io->i_cc);
}
/*
* Routine to do a one-sector I/O operation, and wait for it
* to complete.
*/
wdio(func, unit, blknm, addr)
short *addr;
{
struct disklabel *dd;
register wdc = wdcport;
struct bt_bad *bt_ptr;
int i;
int retries = 0;
long cylin, head, sector;
u_char opcode, erro;
#ifdef SMALL
dd = &disklabel;
#else
dd = &wdsizes[unit];
#endif
if (func == F_WRITE)
opcode = WDCC_WRITE;
else
opcode = WDCC_READ;
/* Calculate data for output. */
cylin = blknm / dd->d_secpercyl;
head = (blknm % dd->d_secpercyl) / dd->d_nsectors;
sector = blknm % dd->d_nsectors;
/*
* See if the current block is in the bad block list.
*/
if (blknm > BBSIZE/DEV_BSIZE) /* should be BBSIZE */
for (bt_ptr = dkbad[unit].bt_bad; bt_ptr->bt_cyl != -1; bt_ptr++) {
if (bt_ptr->bt_cyl > cylin)
/* Sorted list, and we passed our cylinder. quit. */
break;
if (bt_ptr->bt_cyl == cylin &&
bt_ptr->bt_trksec == (head << 8) + sector) {
/*
* Found bad block. Calculate new block addr.
* This starts at the end of the disk (skip the
* last track which is used for the bad block list),
* and works backwards to the front of the disk.
*/
#ifdef WDDEBUG
printf("--- badblock code -> Old = %d; ",
blknm);
#endif
blknm = dd->d_secperunit - dd->d_nsectors
- (bt_ptr - dkbad[unit].bt_bad) - 1;
cylin = blknm / dd->d_secpercyl;
head = (blknm % dd->d_secpercyl) / dd->d_nsectors;
sector = blknm % dd->d_nsectors;
#ifdef WDDEBUG
printf("new = %d\n", blknm);
#endif
break;
}
}
sector += 1;
retry:
#ifdef WDDEBUG
printf("sec %d sdh %x cylin %d ", sector,
WDSD_IBM | (unit<<4) | (head & 0xf), cylin);
#endif
outb(wdc+wd_precomp, 0xff);
outb(wdc+wd_seccnt, 1);
outb(wdc+wd_sector, sector);
outb(wdc+wd_cyl_lo, cylin);
outb(wdc+wd_cyl_hi, cylin >> 8);
/* Set up the SDH register (select drive). */
outb(wdc+wd_sdh, WDSD_IBM | (unit<<4) | (head & 0xf));
while ((inb(wdc+wd_status) & WDCS_READY) == 0) ;
outb(wdc+wd_command, opcode);
while (opcode == WDCC_READ && (inb(wdc+wd_status) & WDCS_BUSY))
;
/* Did we get an error? */
if (opcode == WDCC_READ && (inb(wdc+wd_status) & WDCS_ERR))
goto error;
/* Ready to remove data? */
while ((inb(wdc+wd_status) & WDCS_DRQ) == 0) ;
if (opcode == WDCC_READ)
insw(wdc+wd_data,addr,256);
else outsw(wdc+wd_data,addr,256);
/* Check data request (should be done). */
if (inb(wdc+wd_status) & WDCS_DRQ) goto error;
while (opcode == WDCC_WRITE && (inb(wdc+wd_status) & WDCS_BUSY)) ;
if (inb(wdc+wd_status) & WDCS_ERR) goto error;
#ifdef WDDEBUG
printf("+");
#endif
return (0);
error:
erro = inb(wdc+wd_error);
if (++retries < RETRIES)
goto retry;
if (!wdquiet)
#ifdef SMALL
printf("wd%d: hard error: sector %d status %x error %x\n", unit,
blknm, inb(wdc+wd_status), erro);
#else
printf("wd%d: hard %s error: sector %d status %b error %b\n", unit,
opcode == WDCC_READ? "read" : "write", blknm,
inb(wdc+wd_status), WDCS_BITS, erro, WDERR_BITS);
#endif
return (-1);
}
wdinit(io)
struct iob *io;
{
register wdc;
struct disklabel *dd;
unsigned int unit;
struct dkbad *db;
int i, errcnt = 0;
char buf[512];
static open[NWD];
unit = io->i_unit;
if (open[unit]) return(0);
wdcport = io->i_ctlr ? IO_WD2 : IO_WD1;
wdc = wdcport;
#ifdef SMALL
dd = &disklabel;
#else
/* reset controller */
outb(wdc+wd_ctlr, 12); wait(10); outb(wdc+wd_ctlr, 8);
wdwait();
dd = &wdsizes[unit];
tryagainrecal:
/* set SDH, step rate, do restore to recalibrate drive */
outb(wdc+wd_sdh, WDSD_IBM | (unit << 4));
wdwait();
outb(wdc+wd_command, WDCC_RESTORE | WD_STEP);
wdwait();
if ((i = inb(wdc+wd_status)) & WDCS_ERR) {
/*#ifdef SMALL
printf("wd%d: recal status %x error %x\n",
unit, i, inb(wdc+wd_error));
#else*/
printf("wd%d: recal status %b error %b\n",
unit, i, WDCS_BITS, inb(wdc+wd_error), WDERR_BITS);
/*#endif*/
if (++errcnt < 10)
goto tryagainrecal;
return(-1);
}
/*
* Some controllers require this (after a recal they
* revert to a logical translation mode to compensate for
* dos limitation on 10-bit cylinders -- *shudder* -wfj)
* note: cylinders *must* be fewer than or equal to 8 to
* compensate for some IDE drives that latch this for all time.
*/
outb(wdc+wd_sdh, WDSD_IBM | (unit << 4) + 8 -1);
outb(wdc+wd_seccnt, 35 );
outb(wdc+wd_cyl_lo, 1224);
outb(wdc+wd_cyl_hi, 1224/256);
outb(wdc+wd_command, 0x91);
while (inb(wdc+wd_status) & WDCS_BUSY) ;
errcnt = 0;
retry:
/*
* Read in LABELSECTOR to get the pack label and geometry.
*/
outb(wdc+wd_precomp, 0xff); /* sometimes this is head bit 3 */
outb(wdc+wd_seccnt, 1);
outb(wdc+wd_sector, LABELSECTOR + 1);
outb(wdc+wd_cyl_lo, (cyloffset & 0xff));
outb(wdc+wd_cyl_hi, (cyloffset >> 8));
outb(wdc+wd_sdh, WDSD_IBM | (unit << 4));
wdwait();
outb(wdc+wd_command, WDCC_READ);
wdwait();
if ((i = inb(wdc+wd_status)) & WDCS_ERR) {
int err;
err = inb(wdc+wd_error);
if (++errcnt < RETRIES)
goto retry;
if (!wdquiet)
/*#ifdef SMALL
printf("wd%d: reading label, status %x error %x\n",
unit, i, err);
#else*/
printf("wd%d: reading label, status %b error %b\n",
unit, i, WDCS_BITS, err, WDERR_BITS);
/*#endif*/
return(-1);
}
/* Ready to remove data? */
while ((inb(wdc+wd_status) & WDCS_DRQ) == 0) ;
i = insw(wdc+wd_data, buf, 256);
#ifdef WDDEBUG
printf("magic %x,insw %x, %x\n",
((struct disklabel *) (buf + LABELOFFSET))->d_magic, i, buf);
#endif
if (((struct disklabel *) (buf + LABELOFFSET))->d_magic == DISKMAGIC) {
*dd = * (struct disklabel *) (buf + LABELOFFSET);
open[unit] = 1;
} else {
if (!wdquiet)
printf("wd%d: bad disk label\n", unit);
if (io->i_flgs & F_FILE) return(-1);
dkbad[unit].bt_bad[0].bt_cyl = -1;
dd->d_secpercyl = 1999999 ; dd->d_nsectors = 17 ;
dd->d_secsize = 512;
outb(wdc+wd_precomp, 0xff); /* force head 3 bit off */
return (0) ;
}
#endif SMALL
#ifdef SMALL
#ifdef WDDEBUG
printf("magic %x sect %d\n", dd->d_magic, dd->d_nsectors);
#endif
#endif SMALL
/* now that we know the disk geometry, tell the controller */
outb(wdc+wd_cyl_lo, dd->d_ncylinders);
outb(wdc+wd_cyl_hi, (dd->d_ncylinders)>>8);
outb(wdc+wd_sdh, WDSD_IBM | (unit << 4) + dd->d_ntracks-1);
outb(wdc+wd_seccnt, dd->d_nsectors);
outb(wdc+wd_command, 0x91);
while (inb(wdc+wd_status) & WDCS_BUSY) ;
dkbad[unit].bt_bad[0].bt_cyl = -1;
outb(wdc+wd_precomp, dd->d_precompcyl / 4);
/*
* Read bad sector table into memory.
*/
i = 0;
do {
int blknm = dd->d_secperunit - dd->d_nsectors + i;
errcnt = wdio(F_READ, unit, blknm, buf);
} while (errcnt && (i += 2) < 10 && i < dd->d_nsectors);
db = (struct dkbad *)(buf);
#define DKBAD_MAGIC 0x4321
if (errcnt == 0 && db->bt_mbz == 0 && db->bt_flag == DKBAD_MAGIC)
dkbad[unit] = *db;
else {
if (!wdquiet)
printf("wd%d: error in bad-sector file\n", unit);
dkbad[unit].bt_bad[0].bt_cyl = -1;
}
return(0);
}
wdwait()
{
register wdc = wdcport;
register i = 0;
while (inb(wdc+wd_status) & WDCS_BUSY)
;
while ((inb(wdc+wd_status) & WDCS_READY) == 0)
if (i++ > 100000)
return(-1);
return(0);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.