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NetBSD/sys/dev/isa/wd.c
cgd 55a9a547a2 from Soeren Schmidt <sos@login.dkuug.dk>: 
Basically it does a timeout on lost interrupts, starting the operation
again and logging and error message on the console.
additionally fixes some of the (newer ending) while loops
(that made it work with two IDE disks !)
1993-12-13 10:16:56 +00:00

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/*
* 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.
*
* from: @(#)wd.c 7.2 (Berkeley) 5/9/91
* $Id: wd.c,v 1.27 1993/12/13 10:16:56 cgd Exp $
*/
/* Note: This code heavily modified by tih@barsoom.nhh.no; use at own risk! */
/* The following defines represent only a very small part of the mods, most */
/* of them are not marked in any way. -tih */
#define TIHMODS /* wdopen() workaround, some splx() calls */
#define QUIETWORKS /* define this when wdopen() can actually set DKFL_QUIET */
#define INSTRUMENT /* Add instrumentation stuff by Brad Parker */
#define TIPCAT /* theo says: whatever it is, it looks important! */
/* TODO: peel out buffer at low ipl, speed improvement */
/* TODO: find and fix the timing bugs apparent on some controllers */
#include "wd.h"
#if NWDC > 0
#include "param.h"
#include "dkbad.h"
#include "systm.h"
#include "conf.h"
#include "file.h"
#include "stat.h"
#include "ioctl.h"
#include "disklabel.h"
#include "buf.h"
#include "uio.h"
#include "malloc.h"
#include "machine/cpu.h"
#ifdef INSTRUMENT
#include "sys/dkstat.h"
#endif
#include "i386/isa/isa.h"
#include "i386/isa/isa_device.h"
#include "i386/isa/icu.h"
#include "i386/isa/wdreg.h"
#include "syslog.h"
#include "vm/vm.h"
#ifndef WDCNDELAY
#define WDCNDELAY 400000 /* delay = 25us; so 10s for a controller state change */
#endif
#define WDCDELAY 25
/* if you enable this, it will report any delays more than 25us * N long */
/*#define WDCNDELAY_DEBUG 6 */
#define WDIORETRIES 5 /* number of retries before giving up */
#define wdnoreloc(dev) (minor(dev) & 0x80) /* ignore partition table */
#define wddospart(dev) (minor(dev) & 0x40) /* use dos partitions */
#define wdunit(dev) ((minor(dev) & 0x38) >> 3)
#define wdpart(dev) (minor(dev) & 0x7)
#define makewddev(maj, unit, part) (makedev(maj,((unit<<3)+part)))
#define WDRAW 3 /* 'd' partition isn't a partition! */
#define b_cylin b_resid /* cylinder number for doing IO to */
/* shares an entry in the buf struct */
/*
* Drive states. Used to initialize drive.
*/
#define CLOSED 0 /* disk is closed. */
#define WANTOPEN 1 /* open requested, not started */
#define RECAL 2 /* doing restore */
#define OPEN 3 /* done with open */
/*
* The structure of a disk drive.
*/
struct disk {
long dk_bc; /* byte count left */
long dk_bct; /* total byte count left */
short dk_skip; /* blocks already transferred */
short dk_skipm; /* blocks already transferred for multi */
char dk_ctrlr; /* physical controller number */
char dk_unit; /* physical unit number */
char dk_lunit; /* logical unit number */
char dk_state; /* control state */
u_char dk_status; /* copy of status reg. */
u_char dk_error; /* copy of error reg. */
short dk_port; /* i/o port base */
u_long dk_copenpart; /* character units open on this drive */
u_long dk_bopenpart; /* block units open on this drive */
u_long dk_openpart; /* all units open on this drive */
short dk_wlabel; /* label writable? */
short dk_flags; /* drive characteistics found */
#define DKFL_DOSPART 0x00001 /* has DOS partition table */
#define DKFL_QUIET 0x00002 /* report errors back, but don't complain */
#define DKFL_SINGLE 0x00004 /* sector at a time mode */
#define DKFL_ERROR 0x00008 /* processing a disk error */
#define DKFL_BSDLABEL 0x00010 /* has a BSD disk label */
#define DKFL_BADSECT 0x00020 /* has a bad144 badsector table */
#define DKFL_WRITEPROT 0x00040 /* manual unit write protect */
struct wdparams dk_params; /* ESDI/IDE drive/controller parameters */
struct disklabel dk_dd; /* device configuration data */
struct cpu_disklabel dk_cpd;
long dk_badsect[127]; /* 126 plus trailing -1 marker */
};
struct board {
short dkc_port;
};
struct board wdcontroller[NWDC];
struct disk *wddrives[NWD]; /* table of units */
struct buf wdtab[NWDC]; /* various per-controller info */
struct buf wdutab[NWD]; /* head of queue per drive */
struct buf rwdbuf[NWD]; /* buffers for raw IO */
long wdxfer[NWD]; /* count of transfers */
int wdtimeoutstatus[NWD]; /* timeout counters */
int wdprobe(), wdattach();
struct isa_driver wdcdriver = {
wdprobe, wdattach, "wdc",
};
static void wdustart(struct disk *);
static void wdstart(int);
static int wdcommand(struct disk *, int);
static int wdcontrol(struct buf *);
static int wdsetctlr(dev_t, struct disk *);
static int wdgetctlr(int, struct disk *);
static void bad144intern(struct disk *);
static void wddisksort();
static int wdreset(int, int, int);
static int wdtimeout(caddr_t);
/*
* Probe for controller.
*/
int
wdprobe(struct isa_device *dvp)
{
struct disk *du;
int wdc;
if (dvp->id_unit >= NWDC)
return(0);
du = (struct disk *) malloc (sizeof(struct disk), M_TEMP, M_NOWAIT);
bzero(du, sizeof(struct disk));
du->dk_ctrlr = dvp->id_unit;
du->dk_unit = 0;
du->dk_lunit = 0;
wdcontroller[dvp->id_unit].dkc_port = dvp->id_iobase;
wdc = du->dk_port = dvp->id_iobase;
/* check if we have registers that work */
outb(wdc+wd_error, 0x5a); /* error register not writable */
outb(wdc+wd_cyl_lo, 0xa5); /* but all of cyllo are implemented */
if(inb(wdc+wd_error) == 0x5a || inb(wdc+wd_cyl_lo) != 0xa5)
goto nodevice;
wdreset(dvp->id_unit, wdc, 0);
/* execute a controller only command */
if (wdcommand(du, WDCC_DIAGNOSE) < 0)
goto nodevice;
bzero(&wdtab[du->dk_ctrlr], sizeof(struct buf));
free(du, M_TEMP);
return (8);
nodevice:
free(du, M_TEMP);
return (0);
}
/*
* Called for the controller too
* Attach each drive if possible.
*/
int
wdattach(struct isa_device *dvp)
{
int unit, lunit;
struct disk *du;
if (dvp->id_masunit == -1)
return(0);
if (dvp->id_masunit >= NWDC)
return(0);
lunit = dvp->id_unit;
if (lunit == -1) {
printf("wdc%d: cannot support unit ?\n", dvp->id_masunit);
return 0;
}
if (lunit >= NWD)
return(0);
unit = dvp->id_physid;
du = wddrives[lunit] = (struct disk *)
malloc(sizeof(struct disk), M_TEMP, M_NOWAIT);
bzero(du, sizeof(struct disk));
bzero(&wdutab[lunit], sizeof(struct buf));
bzero(&rwdbuf[lunit], sizeof(struct buf));
wdxfer[lunit] = 0;
wdtimeoutstatus[lunit] = 0;
wdtimeout(lunit);
du->dk_ctrlr = dvp->id_masunit;
du->dk_unit = unit;
du->dk_lunit = lunit;
du->dk_port = wdcontroller[dvp->id_masunit].dkc_port;
if(wdgetctlr(unit, du) == 0) {
int i, blank;
printf("wd%d at wdc%d targ %d: ",
dvp->id_unit, dvp->id_masunit, dvp->id_physid);
if(du->dk_params.wdp_heads==0)
printf("(unknown size) <");
else
printf("%dMB %d cyl, %d head, %d sec <",
du->dk_dd.d_ncylinders * du->dk_dd.d_secpercyl / 2048,
du->dk_dd.d_ncylinders, du->dk_dd.d_ntracks,
du->dk_dd.d_nsectors);
for (i=blank=0; i<sizeof(du->dk_params.wdp_model); i++) {
char c = du->dk_params.wdp_model[i];
if (!c)
break;
if (blank && c == ' ')
continue;
if (blank && c != ' ') {
printf(" %c", c);
blank = 0;
continue;
}
if (c == ' ')
blank = 1;
else
printf("%c", c);
}
printf(">\n");
} else {
/*printf("wd%d at wdc%d slave %d -- error\n",
lunit, dvp->id_masunit, unit);*/
wddrives[lunit] = 0;
free(du, M_TEMP);
return 0;
}
return 1;
}
/* Read/write routine for a buffer. Finds the proper unit, range checks
* arguments, and schedules the transfer. Does not wait for the transfer
* to complete. Multi-page transfers are supported. All I/O requests must
* be a multiple of a sector in length.
*/
int
wdstrategy(register struct buf *bp)
{
register struct buf *dp;
struct disk *du; /* Disk unit to do the IO. */
int lunit = wdunit(bp->b_dev);
int s;
/* valid unit, controller, and request? */
if (lunit >= NWD || bp->b_blkno < 0 ||
howmany(bp->b_bcount, DEV_BSIZE) >= (1<<NBBY) ||
(du = wddrives[lunit]) == 0) {
bp->b_error = EINVAL;
bp->b_flags |= B_ERROR;
goto done;
}
/* "soft" write protect check */
if ((du->dk_flags & DKFL_WRITEPROT) && (bp->b_flags & B_READ) == 0) {
bp->b_error = EROFS;
bp->b_flags |= B_ERROR;
goto done;
}
/* have partitions and want to use them? */
if ((du->dk_flags & DKFL_BSDLABEL) != 0 && wdpart(bp->b_dev) != WDRAW) {
/*
* do bounds checking, adjust transfer. if error, process.
* if end of partition, just return
*/
if (bounds_check_with_label(bp, &du->dk_dd, du->dk_wlabel) <= 0)
goto done;
/* otherwise, process transfer request */
}
/* queue transfer on drive, activate drive and controller if idle */
dp = &wdutab[lunit];
s = splbio();
wddisksort(dp, bp);
if (dp->b_active == 0)
wdustart(du); /* start drive */
if (wdtab[du->dk_ctrlr].b_active == 0)
wdstart(du->dk_ctrlr); /* start controller */
splx(s);
return 0;
done:
/* toss transfer, we're done early */
biodone(bp);
return 0;
}
/*
* Routine to queue a command to the controller. The unit's
* request is linked into the active list for the controller.
* If the controller is idle, the transfer is started.
*/
static void
wdustart(register struct disk *du)
{
register struct buf *bp, *dp = &wdutab[du->dk_lunit];
int ctrlr = du->dk_ctrlr;
/* unit already active? */
if (dp->b_active)
return;
/* anything to start? */
bp = dp->b_actf;
if (bp == NULL)
return;
/* link onto controller queue */
dp->b_forw = NULL;
if (wdtab[ctrlr].b_actf == NULL)
wdtab[ctrlr].b_actf = dp;
else
wdtab[ctrlr].b_actl->b_forw = dp;
wdtab[ctrlr].b_actl = dp;
/* mark the drive unit as busy */
dp->b_active = 1;
}
/*
* Controller startup routine. This does the calculation, and starts
* a single-sector read or write operation. Called to start a transfer,
* or from the interrupt routine to continue a multi-sector transfer.
* RESTRICTIONS:
* 1. The transfer length must be an exact multiple of the sector size.
*/
static void
wdstart(int ctrlr)
{
register struct disk *du; /* disk unit for IO */
register struct buf *bp;
struct disklabel *lp;
struct buf *dp;
long blknum, cylin, head, sector;
long secpertrk, secpercyl, addr, timeout;
int lunit, wdc;
int xfrblknum;
unsigned char status;
loop:
/* is there a drive for the controller to do a transfer with? */
dp = wdtab[ctrlr].b_actf;
if (dp == NULL)
return;
/* is there a transfer to this drive ? if so, link it on
the controller's queue */
bp = dp->b_actf;
if (bp == NULL) {
wdtab[ctrlr].b_actf = dp->b_forw;
goto loop;
}
/* obtain controller and drive information */
lunit = wdunit(bp->b_dev);
du = wddrives[lunit];
/* if not really a transfer, do control operations specially */
if (du->dk_state < OPEN) {
(void) wdcontrol(bp);
return;
}
/* calculate transfer details */
blknum = bp->b_blkno + du->dk_skip;
#ifdef WDDEBUG
if (du->dk_skip == 0)
printf("\nwdstart %d: %s %d@%d; map ", lunit,
(bp->b_flags & B_READ) ? "read" : "write",
bp->b_bcount, blknum);
else
printf(" %d)%x", du->dk_skip, inb(du->dk_port+wd_altsts));
#endif
addr = (int) bp->b_un.b_addr;
if (du->dk_skip == 0) {
du->dk_bc = bp->b_bcount;
}
if (du->dk_skipm == 0) {
struct buf *oldbp, *nextbp;
oldbp = bp;
nextbp = bp->av_forw;
du->dk_bct = du->dk_bc;
oldbp->b_flags |= B_XXX;
while( nextbp
&& (oldbp->b_flags & DKFL_SINGLE) == 0
&& oldbp->b_dev == nextbp->b_dev
&& nextbp->b_blkno == (oldbp->b_blkno + (oldbp->b_bcount/DEV_BSIZE))
&& (oldbp->b_flags & B_READ) == (nextbp->b_flags & B_READ)) {
if( (du->dk_bct+nextbp->b_bcount)/DEV_BSIZE >= 240) {
break;
}
du->dk_bct += nextbp->b_bcount;
oldbp->b_flags |= B_XXX;
oldbp = nextbp;
nextbp = nextbp->av_forw;
}
}
lp = &du->dk_dd;
secpertrk = lp->d_nsectors;
secpercyl = lp->d_secpercyl;
if ((du->dk_flags & DKFL_BSDLABEL) != 0 && wdpart(bp->b_dev) != WDRAW)
blknum += lp->d_partitions[wdpart(bp->b_dev)].p_offset;
cylin = blknum / secpercyl;
head = (blknum % secpercyl) / secpertrk;
sector = blknum % secpertrk;
/* Check for bad sectors if we have them, and not formatting */
/* Only do this in single-sector mode, or when starting a */
/* multiple-sector transfer. */
#ifdef B_FORMAT
if ((du->dk_flags & DKFL_BADSECT) && !(bp->b_flags & B_FORMAT) &&
((du->dk_skipm == 0) || (du->dk_flags & DKFL_SINGLE))) {
#else
if ((du->dk_flags & DKFL_BADSECT) &&
((du->dk_skipm == 0) || (du->dk_flags & DKFL_SINGLE))) {
#endif
long blkchk, blkend, blknew;
int i;
blkend = blknum + howmany(du->dk_bct, DEV_BSIZE) - 1;
for (i = 0; (blkchk = du->dk_badsect[i]) != -1; i++) {
if (blkchk > blkend) {
break; /* transfer is completely OK; done */
} else if (blkchk == blknum) {
blknew = lp->d_secperunit - lp->d_nsectors - i - 1;
cylin = blknew / secpercyl;
head = (blknew % secpercyl) / secpertrk;
sector = blknew % secpertrk;
du->dk_flags |= DKFL_SINGLE;
/* found and replaced first blk of transfer; done */
break;
} else if (blkchk > blknum) {
du->dk_flags |= DKFL_SINGLE;
break; /* bad block inside transfer; done */
}
}
}
if( du->dk_flags & DKFL_SINGLE) {
du->dk_bct = du->dk_bc;
du->dk_skipm = du->dk_skip;
}
#ifdef WDDEBUG
pg("c%d h%d s%d ", cylin, head, sector);
#endif
sector += 1; /* sectors begin with 1, not 0 */
wdtab[ctrlr].b_active = 1; /* mark controller active */
wdc = du->dk_port;
#ifdef INSTRUMENT
/* instrumentation */
if (du->dk_unit >= 0 && du->dk_skip == 0) {
dk_busy |= 1 << du->dk_lunit;
dk_wds[du->dk_lunit] += bp->b_bcount >> 6;
}
if (du->dk_unit >= 0 && du->dk_skipm == 0) {
++dk_seek[du->dk_lunit];
++dk_xfer[du->dk_lunit];
}
#endif
retry:
/* if starting a multisector transfer, or doing single transfers */
if (du->dk_skipm == 0 || (du->dk_flags & DKFL_SINGLE)) {
if (wdtab[ctrlr].b_errcnt && (bp->b_flags & B_READ) == 0) {
du->dk_bc += DEV_BSIZE;
du->dk_bct += DEV_BSIZE;
}
/* controller idle? */
for (timeout=0; inb(wdc+wd_status) & WDCS_BUSY; ) {
DELAY(WDCDELAY);
if (++timeout < WDCNDELAY)
continue;
wdreset(ctrlr, wdc, 1);
break;
}
#ifdef WDCNDELAY_DEBUG
if(timeout>WDCNDELAY_DEBUG)
printf("wdc%d: timeout took %dus\n", ctrlr, WDCDELAY * timeout);
#endif
/* stuff the task file */
outb(wdc+wd_precomp, lp->d_precompcyl / 4);
#ifdef B_FORMAT
if (bp->b_flags & B_FORMAT) {
outb(wdc+wd_sector, lp->d_gap3);
outb(wdc+wd_seccnt, lp->d_nsectors);
} else {
if (du->dk_flags & DKFL_SINGLE)
outb(wdc+wd_seccnt, 1);
else
outb(wdc+wd_seccnt, howmany(du->dk_bct, DEV_BSIZE));
outb(wdc+wd_sector, sector);
}
#else
if (du->dk_flags & DKFL_SINGLE)
outb(wdc+wd_seccnt, 1);
else
outb(wdc+wd_seccnt, howmany(du->dk_bct, DEV_BSIZE));
outb(wdc+wd_sector, sector);
#endif
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 | (du->dk_unit<<4) | (head & 0xf));
/* wait for drive to become ready */
for (timeout=0; (inb(wdc+wd_status) & WDCS_READY) == 0; ) {
DELAY(WDCDELAY);
if (++timeout < WDCNDELAY)
continue;
wdreset(ctrlr, wdc, 1);
goto retry;
}
#ifdef WDCNDELAY_DEBUG
if(timeout>WDCNDELAY_DEBUG)
printf("wdc%d: timeout took %dus\n", ctrlr, WDCDELAY * timeout);
#endif
/* initiate command! */
#ifdef B_FORMAT
if (bp->b_flags & B_FORMAT)
outb(wdc+wd_command, WDCC_FORMAT);
else
outb(wdc+wd_command,
(bp->b_flags & B_READ)? WDCC_READ : WDCC_WRITE);
#else
outb(wdc+wd_command, (bp->b_flags & B_READ)? WDCC_READ : WDCC_WRITE);
#endif
#ifdef WDDEBUG
printf("sector %d cylin %d head %d addr %x sts %x\n",
sector, cylin, head, addr, inb(wdc+wd_altsts));
#endif
}
/* if this is a read operation, just go away until it's done. */
if (bp->b_flags & B_READ) {
wdtimeoutstatus[lunit] = 2;
return;
}
/* ready to send data? */
for (timeout=0; (inb(wdc+wd_altsts) & WDCS_DRQ) == 0; ) {
DELAY(WDCDELAY);
if (++timeout < WDCNDELAY)
continue;
wdreset(ctrlr, wdc, 1);
goto retry;
}
#ifdef WDCNDELAY_DEBUG
if(timeout>WDCNDELAY_DEBUG)
printf("wdc%d: timeout took %dus\n", ctrlr, WDCDELAY * timeout);
#endif
/* then send it! */
outagain:
outsw (wdc+wd_data, addr+du->dk_skip * DEV_BSIZE,
DEV_BSIZE/sizeof(short));
du->dk_bc -= DEV_BSIZE;
du->dk_bct -= DEV_BSIZE;
wdtimeoutstatus[lunit] = 2;
}
/* Interrupt routine for the controller. Acknowledge the interrupt, check for
* errors on the current operation, mark it done if necessary, and start
* the next request. Also check for a partially done transfer, and
* continue with the next chunk if so.
*/
void
wdintr(struct intrframe wdif)
{
register struct disk *du;
register struct buf *bp, *dp;
int status, wdc, ctrlr, timeout;
ctrlr = wdif.if_vec;
if (!wdtab[ctrlr].b_active) {
printf("wdc%d: extra interrupt\n", ctrlr);
return;
}
dp = wdtab[ctrlr].b_actf;
bp = dp->b_actf;
du = wddrives[wdunit(bp->b_dev)];
wdc = du->dk_port;
wdtimeoutstatus[wdunit(bp->b_dev)] = 0;
#ifdef WDDEBUG
printf("I%d ", ctrlr);
#endif
for (timeout=0; ((status=inb(wdc+wd_status)) & WDCS_BUSY); ) {
DELAY(WDCDELAY);
if (++timeout < WDCNDELAY/20)
continue;
wdstart(ctrlr);
/* #ifdef WDDEBUG */
printf("wdc%d: timeout in wdintr WDCS_BUSY\n", ctrlr);
/* #endif */
}
/* is it not a transfer, but a control operation? */
if (du->dk_state < OPEN) {
if (wdcontrol(bp))
wdstart(ctrlr);
return;
}
/* have we an error? */
if (status & (WDCS_ERR | WDCS_ECCCOR)) {
du->dk_status = status;
du->dk_error = inb(wdc + wd_error);
#ifdef WDDEBUG
printf("status %x error %x\n", status, du->dk_error);
#endif
if((du->dk_flags & DKFL_SINGLE) == 0) {
du->dk_flags |= DKFL_ERROR;
goto outt;
}
#ifdef B_FORMAT
if (bp->b_flags & B_FORMAT) {
bp->b_flags |= B_ERROR;
goto done;
}
#endif
/* error or error correction? */
if (status & WDCS_ERR) {
if (++wdtab[ctrlr].b_errcnt < WDIORETRIES) {
wdtab[ctrlr].b_active = 0;
} else {
if((du->dk_flags & DKFL_QUIET) == 0) {
diskerr(bp, "wd", "hard error",
LOG_PRINTF, du->dk_skip,
&du->dk_dd);
#ifdef WDDEBUG
printf( "status %b error %b\n",
status, WDCS_BITS,
inb(wdc+wd_error), WDERR_BITS);
#endif
}
bp->b_flags |= B_ERROR; /* flag the error */
}
} else if((du->dk_flags & DKFL_QUIET) == 0) {
diskerr(bp, "wd", "soft ecc", 0,
du->dk_skip, &du->dk_dd);
}
}
outt:
/*
* If this was a successful read operation, fetch the data.
*/
if (((bp->b_flags & (B_READ | B_ERROR)) == B_READ) && wdtab[ctrlr].b_active) {
int chk, dummy;
chk = min(DEV_BSIZE / sizeof(short), du->dk_bc / sizeof(short));
/* ready to receive data? */
for (timeout=0; (inb(wdc+wd_status) & WDCS_DRQ) == 0; ) {
DELAY(WDCDELAY);
if (++timeout < WDCNDELAY/20)
continue;
wdstart(ctrlr);
/* #ifdef WDDEBUG */
printf("wdc%d: timeout in wdintr WDCS_DRQ\n", ctrlr);
/* #endif */
break;
}
/* suck in data */
insw (wdc+wd_data,
(int)bp->b_un.b_addr + du->dk_skip * DEV_BSIZE, chk);
du->dk_bc -= chk * sizeof(short);
du->dk_bct -= chk * sizeof(short);
/* for obselete fractional sector reads */
while (chk++ < (DEV_BSIZE / sizeof(short)))
insw(wdc+wd_data, &dummy, 1);
}
wdxfer[du->dk_lunit]++;
if (wdtab[ctrlr].b_active) {
#ifdef INSTRUMENT
if (du->dk_unit >= 0)
dk_busy &=~ (1 << du->dk_unit);
#endif
if ((bp->b_flags & B_ERROR) == 0) {
du->dk_skip++; /* Add to succ. sect */
du->dk_skipm++; /* Add to succ. sect for multitransfer */
if (wdtab[ctrlr].b_errcnt && (du->dk_flags & DKFL_QUIET) == 0)
diskerr(bp, "wd", "soft error", 0,
du->dk_skip, &du->dk_dd);
wdtab[ctrlr].b_errcnt = 0;
/* see if more to transfer */
if (du->dk_bc > 0 && (du->dk_flags & DKFL_ERROR) == 0) {
if( (du->dk_flags & DKFL_SINGLE)
|| (du->dk_flags & B_READ) == 0) {
wdstart(ctrlr);
return; /* next chunk is started */
}
} else if ((du->dk_flags & (DKFL_SINGLE|DKFL_ERROR)) == DKFL_ERROR) {
du->dk_skip = 0;
du->dk_skipm = 0;
du->dk_flags &= ~DKFL_ERROR;
du->dk_flags |= DKFL_SINGLE;
wdstart(ctrlr);
return; /* redo xfer sector by sector */
}
}
done:
/* done with this transfer, with or without error */
du->dk_flags &= ~DKFL_SINGLE;
wdtab[ctrlr].b_errcnt = 0;
du->dk_skip = 0;
if( du->dk_bct == 0) {
wdtab[ctrlr].b_actf = dp->b_forw;
du->dk_skipm = 0;
dp->b_active = 0;
}
dp->b_actf = bp->av_forw;
dp->b_errcnt = 0;
bp->b_resid = 0;
bp->b_flags &= ~B_XXX;
biodone(bp);
}
/* anything more on drive queue? */
if (dp->b_actf && du->dk_bct == 0)
wdustart(du);
/* anything more for controller to do? */
if (wdtab[ctrlr].b_actf)
wdstart(ctrlr);
if (!wdtab[ctrlr].b_actf)
wdtab[ctrlr].b_active = 0;
}
/*
* Initialize a drive.
*/
int
wdopen(dev_t dev, int flags, int fmt, struct proc *p)
{
register unsigned int lunit;
register struct disk *du;
int part = wdpart(dev), mask = 1 << part;
struct partition *pp;
int error = 0;
char *msg;
lunit = wdunit(dev);
if (lunit >= NWD)
return (ENXIO);
du = wddrives[lunit];
if (du == 0)
return (ENXIO);
#ifdef QUIETWORKS
if (part == WDRAW)
du->dk_flags |= DKFL_QUIET;
else
du->dk_flags &= ~DKFL_QUIET;
#else
du->dk_flags &= ~DKFL_QUIET;
#endif
if ((du->dk_flags & DKFL_BSDLABEL) == 0) {
du->dk_flags |= DKFL_WRITEPROT;
wdutab[lunit].b_actf = NULL;
/*
* Use the default sizes until we've read the label,
* or longer if there isn't one there.
*/
bzero(&du->dk_dd, sizeof(du->dk_dd));
#undef d_type /* fix goddamn segments.h! XXX */
du->dk_dd.d_type = DTYPE_ST506;
du->dk_dd.d_ncylinders = 1024;
du->dk_dd.d_secsize = DEV_BSIZE;
du->dk_dd.d_ntracks = 8;
du->dk_dd.d_nsectors = 17;
du->dk_dd.d_secpercyl = 17*8;
du->dk_dd.d_secperunit = 17*8*1024;
du->dk_state = WANTOPEN;
/* read label using "raw" partition */
#if defined(TIHMODS) && defined(garbage)
/* wdsetctlr(dev, du); */ /* Maybe do this TIH */
msg = readdisklabel(makewddev(major(dev), wdunit(dev), WDRAW),
wdstrategy, &du->dk_dd, &du->dk_cpd);
wdsetctlr(dev, du);
msg = readdisklabel(makewddev(major(dev), wdunit(dev), WDRAW),
wdstrategy, &du->dk_dd, &du->dk_cpd);
if (msg) {
#ifdef QUIETWORKS
if((du->dk_flags & DKFL_QUIET) == 0) {
log(LOG_WARNING, "wd%d: cannot find label (%s)\n",
lunit, msg);
error = EINVAL; /* XXX needs translation */
}
#else
log(LOG_WARNING, "wd%d: cannot find label (%s)\n", lunit, msg);
if(part != WDRAW) {
error = EINVAL; /* XXX needs translation */
}
#endif
goto done;
} else {
wdsetctlr(dev, du);
du->dk_flags |= DKFL_BSDLABEL;
du->dk_flags &= ~DKFL_WRITEPROT;
if (du->dk_dd.d_flags & D_BADSECT)
du->dk_flags |= DKFL_BADSECT;
}
#else
if (msg = readdisklabel(makewddev(major(dev), wdunit(dev), WDRAW),
wdstrategy, &du->dk_dd, &du->dk_cpd) ) {
if((du->dk_flags & DKFL_QUIET) == 0) {
log(LOG_WARNING, "wd%d: cannot find label (%s)\n",
lunit, msg);
error = EINVAL; /* XXX needs translation */
}
goto done;
} else {
wdsetctlr(dev, du);
du->dk_flags |= DKFL_BSDLABEL;
du->dk_flags &= ~DKFL_WRITEPROT;
if (du->dk_dd.d_flags & D_BADSECT)
du->dk_flags |= DKFL_BADSECT;
}
#endif
done:
if (error) {
return(error);
}
}
if (du->dk_flags & DKFL_BADSECT)
bad144intern(du);
/*
* Warn if a partion is opened
* that overlaps another partition which is open
* unless one is the "raw" partition (whole disk).
*/
if ((du->dk_openpart & mask) == 0 /*&& part != RAWPART*/ && part != WDRAW) {
int start, end;
pp = &du->dk_dd.d_partitions[part];
start = pp->p_offset;
end = pp->p_offset + pp->p_size;
for (pp = du->dk_dd.d_partitions;
pp < &du->dk_dd.d_partitions[du->dk_dd.d_npartitions]; pp++) {
if (pp->p_offset + pp->p_size <= start || pp->p_offset >= end)
continue;
/*if (pp - du->dk_dd.d_partitions == RAWPART)
continue; */
if (pp - du->dk_dd.d_partitions == WDRAW)
continue;
if (du->dk_openpart & (1 << (pp - du->dk_dd.d_partitions)))
log(LOG_WARNING,
"wd%d%c: overlaps open partition (%c)\n",
lunit, part + 'a',
pp - du->dk_dd.d_partitions + 'a');
}
}
if (part >= du->dk_dd.d_npartitions && part != WDRAW) {
return (ENXIO);
}
/* insure only one open at a time */
du->dk_openpart |= mask;
switch (fmt) {
case S_IFCHR:
du->dk_copenpart |= mask;
break;
case S_IFBLK:
du->dk_bopenpart |= mask;
break;
}
return (0);
}
/*
* Implement operations other than read/write.
* Called from wdstart or wdintr during opens and formats.
* Uses finite-state-machine to track progress of operation in progress.
* Returns 0 if operation still in progress, 1 if completed.
*/
static int
wdcontrol(register struct buf *bp)
{
register struct disk *du;
register unit, lunit;
unsigned char stat;
int s, ctrlr, timeout;
int wdc;
du = wddrives[wdunit(bp->b_dev)];
ctrlr = du->dk_ctrlr;
unit = du->dk_unit;
lunit = du->dk_lunit;
wdc = du->dk_port;
switch (du->dk_state) {
tryagainrecal:
case WANTOPEN: /* set SDH, step rate, do restore */
#ifdef WDDEBUG
printf("wd%d: recal ", lunit);
#endif
s = splbio(); /* not called from intr level ... */
wdgetctlr(unit, du);
#ifdef TIPCAT
for (timeout=0; (inb(wdc+wd_status) & WDCS_READY) == 0; ) {
DELAY(WDCDELAY);
if (++timeout < WDCNDELAY)
continue;
wdreset(ctrlr, wdc, 1);
goto tryagainrecal;
}
#ifdef WDCNDELAY_DEBUG
if(timeout>WDCNDELAY_DEBUG)
printf("wdc%d: timeout took %dus\n", ctrlr, WDCDELAY * timeout);
#endif
#endif
outb(wdc+wd_sdh, WDSD_IBM | (unit << 4));
wdtab[ctrlr].b_active = 1;
outb(wdc+wd_command, WDCC_RESTORE | WD_STEP);
#ifdef TIPCAT
for (timeout=0; (inb(wdc+wd_status) & WDCS_READY) == 0; ) {
DELAY(WDCDELAY);
if (++timeout < WDCNDELAY)
continue;
wdreset(ctrlr, wdc, 1);
goto tryagainrecal;
}
#ifdef WDCNDELAY_DEBUG
if(timeout>WDCNDELAY_DEBUG)
printf("wdc%d: timeout took %dus\n", ctrlr, WDCDELAY * timeout);
#endif
#endif
du->dk_state = RECAL;
splx(s);
return(0);
case RECAL:
if ((stat = inb(wdc+wd_status)) & WDCS_ERR) {
if ((du->dk_flags & DKFL_QUIET) == 0) {
printf("wd%d: recal", du->dk_lunit);
printf(": status %b error %b\n",
stat, WDCS_BITS, inb(wdc+wd_error),
WDERR_BITS);
}
if (++wdtab[ctrlr].b_errcnt < WDIORETRIES)
goto tryagainrecal;
bp->b_error = ENXIO; /* XXX needs translation */
goto badopen;
}
/* some controllers require this ... */
wdsetctlr(bp->b_dev, du);
wdtab[ctrlr].b_errcnt = 0;
du->dk_state = OPEN;
/*
* The rest of the initialization can be done
* by normal means.
*/
return(1);
default:
panic("wdcontrol");
}
/* NOTREACHED */
badopen:
if ((du->dk_flags & DKFL_QUIET) == 0)
printf(": status %b error %b\n",
stat, WDCS_BITS, inb(wdc + wd_error), WDERR_BITS);
bp->b_flags |= B_ERROR;
return(1);
}
/*
* send a command and wait uninterruptibly until controller is finished.
* return -1 if controller busy for too long, otherwise
* return status. intended for brief controller commands at critical points.
* assumes interrupts are blocked.
*/
static int
wdcommand(struct disk *du, int cmd)
{
int timeout, stat, wdc;
/*DELAY(2000);*/
wdc = du->dk_port;
/* controller ready for command? */
for (timeout=0; (stat=inb(wdc+wd_status)) & WDCS_BUSY; ) {
DELAY(WDCDELAY);
if(++timeout > WDCNDELAY)
return -1;
}
#ifdef WDCNDELAY_DEBUG
if(timeout>WDCNDELAY_DEBUG)
printf("wdc%d: timeout took %dus\n", du->dk_ctrlr, WDCDELAY * timeout);
#endif
/* send command, await results */
outb(wdc+wd_command, cmd);
for (timeout=0; (stat=inb(wdc+wd_status)) & WDCS_BUSY; ) {
DELAY(WDCDELAY);
if(++timeout > WDCNDELAY)
return -1;
}
#ifdef WDCNDELAY_DEBUG
if(timeout>WDCNDELAY_DEBUG)
printf("wdc%d: timeout took %dus\n", du->dk_ctrlr, WDCDELAY * timeout);
#endif
if (cmd != WDCC_READP)
return (stat);
/* is controller ready to return data? */
for (timeout=0; ((stat=inb(wdc+wd_status)) & (WDCS_ERR|WDCS_DRQ)) == 0; ) {
DELAY(WDCDELAY);
if(++timeout > WDCNDELAY)
return -1;
}
#ifdef WDCNDELAY_DEBUG
if(timeout>WDCNDELAY_DEBUG)
printf("wdc%d: timeout took %dus\n", du->dk_ctrlr, WDCDELAY * timeout);
#endif
return (stat);
}
/*
* issue IDC to drive to tell it just what geometry it is to be.
*/
static int
wdsetctlr(dev_t dev, struct disk *du)
{
int stat, x, wdc;
/*
printf("wd(%d,%d) C%dH%dS%d\n", du->dk_ctrlr, du->dk_unit,
du->dk_dd.d_ncylinders, du->dk_dd.d_ntracks, du->dk_dd.d_nsectors);
*/
wdc = du->dk_port;
/*DELAY(2000);*/
x = splbio();
outb(wdc+wd_cyl_lo, du->dk_dd.d_ncylinders); /* TIH: was ...ders+1 */
outb(wdc+wd_cyl_hi, (du->dk_dd.d_ncylinders)>>8); /* TIH: was ...ders+1 */
outb(wdc+wd_sdh, WDSD_IBM | (du->dk_unit << 4) + du->dk_dd.d_ntracks-1);
outb(wdc+wd_seccnt, du->dk_dd.d_nsectors);
stat = wdcommand(du, WDCC_IDC);
#ifndef TIHMODS
if (stat < 0)
return(stat);
#endif
if (stat & WDCS_ERR)
printf("wdsetctlr: status %b error %b\n",
stat, WDCS_BITS, inb(wdc+wd_error), WDERR_BITS);
splx(x);
return(stat);
}
/*
* issue READP to drive to ask it what it is.
*/
static int
wdgetctlr(int u, struct disk *du)
{
int stat, x, i, wdc;
char tb[DEV_BSIZE];
struct wdparams *wp;
int timeout;
x = splbio(); /* not called from intr level ... */
wdc = du->dk_port;
#ifdef TIPCAT
for (timeout=0; (inb(wdc+wd_status) & WDCS_BUSY); ) {
DELAY(WDCDELAY);
if(++timeout > WDCNDELAY) {
splx(x);
return -1;
}
}
#ifdef WDCNDELAY_DEBUG
if(timeout>WDCNDELAY_DEBUG)
printf("wdc%d: timeout took %dus\n", du->dk_ctrlr, WDCDELAY * timeout);
#endif
#endif
outb(wdc+wd_sdh, WDSD_IBM | (u << 4));
#ifdef TIPCAT
for (timeout=0; (inb(wdc+wd_status) & WDCS_READY) == 0; ) {
DELAY(WDCDELAY);
if(++timeout > WDCNDELAY) {
splx(x);
return -1;
}
}
#ifdef WDCNDELAY_DEBUG
if(timeout>WDCNDELAY_DEBUG)
printf("wdc%d: timeout took %dus\n", du->dk_ctrlr, WDCDELAY * timeout);
#endif
#endif
stat = wdcommand(du, WDCC_READP);
#ifdef TIPCAT
for (timeout=0; (inb(wdc+wd_status) & WDCS_READY) == 0; ) {
DELAY(WDCDELAY);
if(++timeout > WDCNDELAY) {
splx(x);
return -1;
}
}
#ifdef WDCNDELAY_DEBUG
if(timeout>WDCNDELAY_DEBUG)
printf("wdc%d: timeout took %dus\n", du->dk_ctrlr, WDCDELAY * timeout);
#endif
#endif
#ifndef TIHMODS
if (stat < 0)
return(stat);
#else
if (stat < 0) {
splx(x);
return(stat);
}
#endif
if( (stat & WDCS_ERR) == 0) {
/* obtain parameters */
wp = &du->dk_params;
insw(wdc+wd_data, tb, sizeof(tb)/sizeof(short));
bcopy(tb, wp, sizeof(struct wdparams));
/* shuffle string byte order */
for (i=0; i < sizeof(wp->wdp_model); i+=2) {
u_short *p;
p = (u_short *) (wp->wdp_model + i);
*p = ntohs(*p);
}
strncpy(du->dk_dd.d_typename, "ESDI/IDE", sizeof du->dk_dd.d_typename);
du->dk_dd.d_type = DTYPE_ESDI;
bcopy(wp->wdp_model+20, du->dk_dd.d_packname, 14-1);
/* update disklabel given drive information */
du->dk_dd.d_ncylinders = wp->wdp_fixedcyl + wp->wdp_removcyl /*+- 1*/;
du->dk_dd.d_ntracks = wp->wdp_heads;
du->dk_dd.d_nsectors = wp->wdp_sectors;
du->dk_dd.d_secpercyl = du->dk_dd.d_ntracks * du->dk_dd.d_nsectors;
du->dk_dd.d_partitions[1].p_size = du->dk_dd.d_secpercyl *
wp->wdp_sectors;
du->dk_dd.d_partitions[1].p_offset = 0;
} else {
/*
* If WDCC_READP fails then we might have an old drive
* so we try a seek to 0; if that passes then the
* drive is there but it's OLD AND KRUSTY.
*/
stat = wdcommand(du, WDCC_RESTORE | WD_STEP);
if(stat & WDCS_ERR) {
splx(x);
return(inb(wdc+wd_error));
}
strncpy(du->dk_dd.d_typename, "ST506", sizeof du->dk_dd.d_typename);
strncpy(du->dk_params.wdp_model, "Unknown Type",
sizeof du->dk_params.wdp_model);
du->dk_dd.d_type = DTYPE_ST506;
}
#if 0
printf("gc %x cyl %d trk %d sec %d type %d sz %d model %s\n", wp->wdp_config,
wp->wdp_fixedcyl+wp->wdp_removcyl, wp->wdp_heads, wp->wdp_sectors,
wp->wdp_cntype, wp->wdp_cnsbsz, wp->wdp_model);
#endif
/* better ... */
du->dk_dd.d_subtype |= DSTYPE_GEOMETRY;
/* XXX sometimes possibly needed */
(void) inb(wdc+wd_status);
#ifdef TIHMODS
splx(x);
#endif
return (0);
}
/* ARGSUSED */
int
wdclose(dev_t dev, int flags, int fmt)
{
register struct disk *du;
int part = wdpart(dev), mask = 1 << part;
du = wddrives[wdunit(dev)];
/* insure only one open at a time */
du->dk_openpart &= ~mask;
switch (fmt) {
case S_IFCHR:
du->dk_copenpart &= ~mask;
break;
case S_IFBLK:
du->dk_bopenpart &= ~mask;
break;
}
return(0);
}
int
wdioctl(dev_t dev, int cmd, caddr_t addr, int flag)
{
int lunit = wdunit(dev);
register struct disk *du;
int error = 0;
struct uio auio;
struct iovec aiov;
du = wddrives[lunit];
switch (cmd) {
case DIOCSBAD:
if ((flag & FWRITE) == 0)
error = EBADF;
else {
du->dk_cpd.bad = *(struct dkbad *)addr;
bad144intern(du);
}
break;
case DIOCGDINFO:
*(struct disklabel *)addr = du->dk_dd;
break;
case DIOCGPART:
((struct partinfo *)addr)->disklab = &du->dk_dd;
((struct partinfo *)addr)->part =
&du->dk_dd.d_partitions[wdpart(dev)];
break;
case DIOCSDINFO:
if ((flag & FWRITE) == 0)
error = EBADF;
else {
error = setdisklabel(&du->dk_dd, (struct disklabel *)addr,
/*(du->dk_flags&DKFL_BSDLABEL) ? du->dk_openpart : */0,
&du->dk_cpd);
}
if (error == 0) {
du->dk_flags |= DKFL_BSDLABEL;
wdsetctlr(dev, du);
}
break;
case DIOCWLABEL:
du->dk_flags &= ~DKFL_WRITEPROT;
if ((flag & FWRITE) == 0)
error = EBADF;
else
du->dk_wlabel = *(int *)addr;
break;
case DIOCWDINFO:
du->dk_flags &= ~DKFL_WRITEPROT;
if ((flag & FWRITE) == 0)
error = EBADF;
else if ((error = setdisklabel(&du->dk_dd, (struct disklabel *)addr,
/*(du->dk_flags & DKFL_BSDLABEL) ? du->dk_openpart :*/ 0,
&du->dk_cpd)) == 0) {
int wlab;
du->dk_flags |= DKFL_BSDLABEL;
wdsetctlr(dev, du);
/* simulate opening partition 0 so write succeeds */
du->dk_openpart |= (1 << 0); /* XXX */
wlab = du->dk_wlabel;
du->dk_wlabel = 1;
error = writedisklabel(dev, wdstrategy, &du->dk_dd, &du->dk_cpd);
du->dk_openpart = du->dk_copenpart | du->dk_bopenpart;
du->dk_wlabel = wlab;
}
break;
#ifdef notyet
case DIOCGDINFOP:
*(struct disklabel **)addr = &(du->dk_dd);
break;
case DIOCWFORMAT:
if ((flag & FWRITE) == 0)
error = EBADF;
else {
register struct format_op *fop;
fop = (struct format_op *)addr;
aiov.iov_base = fop->df_buf;
aiov.iov_len = fop->df_count;
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
auio.uio_resid = fop->df_count;
auio.uio_segflg = 0;
auio.uio_offset = fop->df_startblk * du->dk_dd.d_secsize;
error = physio(wdformat, &rwdbuf[lunit], dev, B_WRITE,
minphys, &auio);
fop->df_count -= auio.uio_resid;
fop->df_reg[0] = du->dk_status;
fop->df_reg[1] = du->dk_error;
}
break;
#endif
default:
error = ENOTTY;
break;
}
return (error);
}
#ifdef B_FORMAT
int
wdformat(struct buf *bp)
{
bp->b_flags |= B_FORMAT;
return (wdstrategy(bp));
}
#endif
int
wdsize(dev_t dev)
{
int lunit = wdunit(dev), part = wdpart(dev);
struct disk *du;
if (lunit >= NWD)
return(-1);
if ((du = wddrives[lunit]) == 0)
return (-1);
if (du->dk_state < OPEN || (du->dk_flags & DKFL_BSDLABEL) == 0) {
int val;
val = wdopen(makewddev(major(dev), lunit, WDRAW), FREAD, S_IFBLK, 0);
if (val != 0)
return (-1);
}
if ((du->dk_flags & (DKFL_WRITEPROT|DKFL_BSDLABEL)) != DKFL_BSDLABEL)
return (-1);
else
return((int)du->dk_dd.d_partitions[part].p_size);
}
extern char *vmmap; /* poor name! */
/* dump core after a system crash */
int
wddump(dev_t dev)
{
register struct disk *du; /* disk unit to do the IO */
long num; /* number of sectors to write */
int ctrlr, lunit, part, wdc;
long blkoff, blknum;
long cylin, head, sector, stat;
long secpertrk, secpercyl, nblocks, i;
char *addr;
extern int Maxmem;
static wddoingadump = 0;
extern caddr_t CADDR1;
addr = (char *) 0; /* starting address */
#if DO_NOT_KNOW_HOW
/* toss any characters present prior to dump, ie. non-blocking getc */
while (cngetc())
;
#endif
/* size of memory to dump */
num = Maxmem;
lunit = wdunit(dev); /* eventually support floppies? */
part = wdpart(dev); /* file system */
/* check for acceptable drive number */
if (lunit >= NWD)
return(ENXIO);
du = wddrives[lunit];
if (du == 0)
return(ENXIO);
/* was it ever initialized ? */
if (du->dk_state < OPEN)
return (ENXIO);
if (du->dk_flags & DKFL_WRITEPROT)
return(ENXIO);
wdc = du->dk_port;
ctrlr = du->dk_ctrlr;
/* Convert to disk sectors */
num = (u_long) num * NBPG / du->dk_dd.d_secsize;
/* check if controller active */
/*if (wdtab[ctrlr].b_active)
return(EFAULT); */
if (wddoingadump)
return(EFAULT);
secpertrk = du->dk_dd.d_nsectors;
secpercyl = du->dk_dd.d_secpercyl;
nblocks = du->dk_dd.d_partitions[part].p_size;
blkoff = du->dk_dd.d_partitions[part].p_offset;
/*pg("xunit %x, nblocks %d, dumplo %d num %d\n", part,nblocks,dumplo,num);*/
/* check transfer bounds against partition size */
if ((dumplo < 0) || ((dumplo + num) > nblocks))
return(EINVAL);
/* mark controller active for if we panic during the dump */
/* wdtab[ctrlr].b_active = 1; */
wddoingadump = 1;
i = 200000000;
while ((inb(wdc+wd_status) & WDCS_BUSY) && (i-- > 0))
;
outb(wdc+wd_sdh, WDSD_IBM | (du->dk_unit << 4));
outb(wdc+wd_command, WDCC_RESTORE | WD_STEP);
while (inb(wdc+wd_status) & WDCS_BUSY)
;
/* some compaq controllers require this ... */
wdsetctlr(dev, du);
blknum = dumplo + blkoff;
while (num > 0) {
pmap_enter(kernel_pmap, CADDR1, trunc_page(addr), VM_PROT_READ, TRUE);
/* compute disk address */
cylin = blknum / secpercyl;
head = (blknum % secpercyl) / secpertrk;
sector = blknum % secpertrk;
if (du->dk_flags & DKFL_BADSECT) {
long newblk;
int i;
for (i = 0; du->dk_badsect[i] != -1; i++) {
if (blknum < du->dk_badsect[i]) {
break; /* sorted list, passed our block by */
} else if (blknum == du->dk_badsect[i]) {
newblk = du->dk_dd.d_secperunit -
du->dk_dd.d_nsectors - i - 1;
cylin = newblk / secpercyl;
head = (newblk % secpercyl) / secpertrk;
sector = newblk % secpertrk;
/* found and repl; done scanning bad144 table */
break;
}
}
}
sector++; /* origin 1 */
/* select drive. */
outb(wdc+wd_sdh, WDSD_IBM | (du->dk_unit<<4) | (head & 0xf));
while ((inb(wdc+wd_status) & WDCS_READY) == 0)
;
/* transfer some blocks */
outb(wdc+wd_sector, sector);
outb(wdc+wd_seccnt,1);
outb(wdc+wd_cyl_lo, cylin);
outb(wdc+wd_cyl_hi, cylin >> 8);
#ifdef notdef
/* lets just talk about this first...*/
pg ("sdh 0%o sector %d cyl %d addr 0x%x",
inb(wdc+wd_sdh), inb(wdc+wd_sector),
inb(wdc+wd_cyl_hi)*256+inb(wdc+wd_cyl_lo), addr);
#endif
outb(wdc+wd_command, WDCC_WRITE);
/* Ready to send data? */
while ((inb(wdc+wd_status) & WDCS_DRQ) == 0)
;
if (inb(wdc+wd_status) & WDCS_ERR)
return(EIO);
outsw (wdc+wd_data, CADDR1+((int)addr&(NBPG-1)), 256);
if (inb(wdc+wd_status) & WDCS_ERR)
return(EIO);
/* Check data request (should be done). */
if (inb(wdc+wd_status) & WDCS_DRQ)
return(EIO);
/* wait for completion */
for (i=200000000; inb(wdc+wd_status) & WDCS_BUSY ; i--) {
if (i < 0)
return (EIO);
}
/* error check the xfer */
if (inb(wdc+wd_status) & WDCS_ERR)
return(EIO);
if ((unsigned)addr % (1024*1024) == 0)
printf("%d ", num/2048);
/* update block count */
num--;
blknum++;
(int) addr += 512;
#if DO_NOT_KNOW_HOW
/* operator aborting dump? non-blocking getc() */
if (cngetc())
return(EINTR);
#endif
}
return(0);
}
#endif
/*
* Internalize the bad sector table.
*/
void
bad144intern(struct disk *du)
{
int i;
if (du->dk_flags & DKFL_BADSECT) {
for (i = 0; i < 127; i++) {
du->dk_badsect[i] = -1;
}
for (i = 0; i < 126; i++) {
if (du->dk_cpd.bad.bt_bad[i].bt_cyl == 0xffff) {
break;
} else {
du->dk_badsect[i] =
du->dk_cpd.bad.bt_bad[i].bt_cyl *
du->dk_dd.d_secpercyl +
(du->dk_cpd.bad.bt_bad[i].bt_trksec >> 8) *
du->dk_dd.d_nsectors +
(du->dk_cpd.bad.bt_bad[i].bt_trksec & 0x00ff);
}
}
}
}
/* this routine was adopted from the kernel sources */
/* more efficient because b_cylin is not really as useful at this level */
/* so I eliminate the processing, I believe that sorting the sectors */
/* is adequate */
void
wddisksort(struct buf *dp, struct buf *bp)
{
register struct buf *ap;
/*
* If nothing on the activity queue, then
* we become the only thing.
*/
ap = dp->b_actf;
if(ap == NULL) {
dp->b_actf = bp;
dp->b_actl = bp;
bp->av_forw = NULL;
return;
}
while( ap->b_flags & B_XXX) {
if( ap->av_forw == 0 || (ap->av_forw->b_flags & B_XXX) == 0)
break;
ap = ap->av_forw;
}
/*
* If we lie after the first (currently active)
* request, then we must locate the second request list
* and add ourselves to it.
*/
if (bp->b_blkno < ap->b_blkno) {
while (ap->av_forw) {
/*
* Check for an ``inversion'' in the
* normally ascending cylinder numbers,
* indicating the start of the second request list.
*/
if (ap->av_forw->b_blkno < ap->b_blkno) {
/*
* Search the second request list
* for the first request at a larger
* cylinder number. We go before that;
* if there is no such request, we go at end.
*/
do {
if (bp->b_blkno < ap->av_forw->b_blkno)
goto insert;
ap = ap->av_forw;
} while (ap->av_forw);
goto insert; /* after last */
}
ap = ap->av_forw;
}
/*
* No inversions... we will go after the last, and
* be the first request in the second request list.
*/
goto insert;
}
/*
* Request is at/after the current request...
* sort in the first request list.
*/
while (ap->av_forw) {
/*
* We want to go after the current request
* if there is an inversion after it (i.e. it is
* the end of the first request list), or if
* the next request is a larger cylinder than our request.
*/
if (ap->av_forw->b_blkno < ap->b_blkno ||
bp->b_blkno < ap->av_forw->b_blkno )
goto insert;
ap = ap->av_forw;
}
/*
* Neither a second list nor a larger
* request... we go at the end of the first list,
* which is the same as the end of the whole schebang.
*/
insert:
bp->av_forw = ap->av_forw;
ap->av_forw = bp;
if (ap == dp->b_actl)
dp->b_actl = bp;
}
static int
wdreset(int ctrlr, int wdc, int err)
{
int stat, timeout;
if(err)
printf("wdc%d: busy too long, resetting\n", ctrlr);
/* reset the device */
outb(wdc+wd_ctlr, (WDCTL_RST|WDCTL_IDS));
DELAY(1000);
outb(wdc+wd_ctlr, WDCTL_4BIT);
for (timeout=0; (stat=inb(wdc+wd_status)) & WDCS_BUSY; ) {
DELAY(WDCDELAY);
if(++timeout > WDCNDELAY) {
printf("wdc%d: failed to reset controller\n", ctrlr);
break;
}
}
#ifdef WDCNDELAY_DEBUG
if(timeout>WDCNDELAY_DEBUG)
printf("wdc%d: timeout took %dus\n", ctrlr, WDCDELAY * timeout);
#endif
}
static int
wdtimeout(caddr_t arg)
{
int x = splbio();
register int unit = (int) arg;
if (wdtimeoutstatus[unit]) {
if (--wdtimeoutstatus[unit] == 0) {
struct disk *du = wddrives[unit];
int wdc = du->dk_port;
/* #ifdef WDDEBUG */
printf("wd%d: lost interrupt - status %x, error %x\n",
unit, inb(wdc+wd_status), inb(wdc+wd_error));
/* #endif */
outb(wdc+wd_ctlr, (WDCTL_RST|WDCTL_IDS));
DELAY(1000);
outb(wdc+wd_ctlr, WDCTL_IDS);
DELAY(1000);
(void) inb(wdc+wd_error);
outb(wdc+wd_ctlr, WDCTL_4BIT);
du->dk_skip = 0;
du->dk_flags |= DKFL_SINGLE;
wdstart(du->dk_ctrlr); /* start controller */
}
}
timeout((timeout_t)wdtimeout, (caddr_t)unit, 50);
splx(x);
return (0);
}
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