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NetBSD/sys/dev/isa/wd.c

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/* $NetBSD: wd.c,v 1.146 1996/03/01 04:08:51 mycroft Exp $ */
/*
* Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved.
*
* DMA and multi-sector PIO handling are derived from code contributed by
* Onno van der Linden.
*
* 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 Charles M. Hannum.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/buf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/syslog.h>
#include <vm/vm.h>
#include <machine/cpu.h>
#include <machine/pio.h>
#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>
#include <dev/isa/wdreg.h>
#define WAITTIME (4 * hz) /* time to wait for a completion */
#define RECOVERYTIME (hz / 2) /* time to recover from an error */
#define WDCDELAY 100
#define WDCNDELAY 100000 /* delay = 100us; so 10s for a controller state change */
#if 0
/* If you enable this, it will report any delays more than 100us * N long. */
#define WDCNDELAY_DEBUG 10
#endif
#define WDIORETRIES 5 /* number of retries before giving up */
#define WDUNIT(dev) DISKUNIT(dev)
#define WDPART(dev) DISKPART(dev)
#define MAKEWDDEV(maj, unit, part) MAKEDISKDEV(maj, unit, part)
#define WDLABELDEV(dev) (MAKEWDDEV(major(dev), WDUNIT(dev), RAW_PART))
struct wd_softc {
struct device sc_dev;
struct disk sc_dk;
/* Information about the current transfer: */
daddr_t sc_blkno; /* starting block number */
int sc_bcount; /* byte count left */
int sc_skip; /* bytes already transferred */
int sc_nblks; /* number of blocks currently transferring */
int sc_nbytes; /* number of bytes currently transferring */
/* Long-term state: */
int sc_drive; /* physical unit number */
int sc_state; /* control state */
#define RECAL 0 /* recalibrate */
#define RECAL_WAIT 1 /* done recalibrating */
#define GEOMETRY 2 /* upload geometry */
#define GEOMETRY_WAIT 3 /* done uploading geometry */
#define MULTIMODE 4 /* set multiple mode */
#define MULTIMODE_WAIT 5 /* done setting multiple mode */
#define OPEN 6 /* done with open */
int sc_mode; /* transfer mode */
#define WDM_PIOSINGLE 0 /* single-sector PIO */
#define WDM_PIOMULTI 1 /* multi-sector PIO */
#define WDM_DMA 2 /* DMA */
int sc_multiple; /* multiple for WDM_PIOMULTI */
int sc_flags; /* drive characteistics found */
#define WDF_LOCKED 0x01
#define WDF_WANTED 0x02
#define WDF_WLABEL 0x04 /* label is writable */
#define WDF_LABELLING 0x08 /* writing label */
/* XXX Nothing resets this yet, but disk change sensing will when ATAPI is
implemented. */
#define WDF_LOADED 0x10 /* parameters loaded */
#define WDF_32BIT 0x20 /* can do 32-bit transfer */
struct wdparams sc_params; /* ESDI/ATA drive parameters */
daddr_t sc_badsect[127]; /* 126 plus trailing -1 marker */
TAILQ_ENTRY(wd_softc) sc_drivechain;
struct buf sc_q;
};
struct wdc_softc {
struct device sc_dev;
void *sc_ih;
int sc_iobase; /* I/O port base */
int sc_drq; /* DMA channel */
TAILQ_HEAD(drivehead, wd_softc) sc_drives;
int sc_flags;
#define WDCF_ACTIVE 0x01 /* controller is active */
#define WDCF_SINGLE 0x02 /* sector at a time mode */
#define WDCF_ERROR 0x04 /* processing a disk error */
#define WDCF_WANTED 0x08 /* XXX locking for wd_get_parms() */
int sc_errors; /* errors during current transfer */
u_char sc_status; /* copy of status register */
u_char sc_error; /* copy of error register */
};
int wdcprobe __P((struct device *, void *, void *));
void wdcattach __P((struct device *, struct device *, void *));
struct cfdriver wdccd = {
NULL, "wdc", wdcprobe, wdcattach, DV_DULL, sizeof(struct wdc_softc)
};
int wdprobe __P((struct device *, void *, void *));
void wdattach __P((struct device *, struct device *, void *));
struct cfdriver wdcd = {
NULL, "wd", wdprobe, wdattach, DV_DISK, sizeof(struct wd_softc)
};
void wdgetdisklabel __P((struct wd_softc *));
int wd_get_parms __P((struct wd_softc *));
void wdstrategy __P((struct buf *));
void wdstart __P((struct wd_softc *));
struct dkdriver wddkdriver = { wdstrategy };
void wdfinish __P((struct wd_softc *, struct buf *));
int wdcintr __P((void *));
void wdcstart __P((struct wdc_softc *));
int wdcommand __P((struct wd_softc *, int, int, int, int, int));
int wdcommandshort __P((struct wdc_softc *, int, int));
int wdcontrol __P((struct wd_softc *));
int wdsetctlr __P((struct wd_softc *));
static void bad144intern __P((struct wd_softc *));
int wdcreset __P((struct wdc_softc *));
void wdcrestart __P((void *arg));
void wdcunwedge __P((struct wdc_softc *));
void wdctimeout __P((void *arg));
void wderror __P((void *, struct buf *, char *));
int wdcwait __P((struct wdc_softc *, int));
/* ST506 spec says that if READY or SEEKCMPLT go off, then the read or write
command is aborted. */
#define wait_for_drq(d) wdcwait(d, WDCS_DRDY | WDCS_DSC | WDCS_DRQ)
#define wait_for_ready(d) wdcwait(d, WDCS_DRDY | WDCS_DSC)
#define wait_for_unbusy(d) wdcwait(d, 0)
int
wdcprobe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct wdc_softc *wdc = match;
struct isa_attach_args *ia = aux;
int iobase;
wdc->sc_iobase = iobase = ia->ia_iobase;
/* Check if we have registers that work. */
outb(iobase+wd_error, 0x5a); /* Error register not writable, */
outb(iobase+wd_cyl_lo, 0xa5); /* but all of cyllo are. */
if (inb(iobase+wd_error) == 0x5a || inb(iobase+wd_cyl_lo) != 0xa5)
return 0;
if (wdcreset(wdc) != 0) {
delay(500000);
if (wdcreset(wdc) != 0)
return 0;
}
/* Select drive 0. */
outb(iobase+wd_sdh, WDSD_IBM | 0);
/* Wait for controller to become ready. */
if (wait_for_unbusy(wdc) < 0)
return 0;
/* Start drive diagnostics. */
outb(iobase+wd_command, WDCC_DIAGNOSE);
/* Wait for command to complete. */
if (wait_for_unbusy(wdc) < 0)
return 0;
ia->ia_iosize = 8;
ia->ia_msize = 0;
return 1;
}
struct wdc_attach_args {
int wa_drive;
};
int
wdprint(aux, wdc)
void *aux;
char *wdc;
{
struct wdc_attach_args *wa = aux;
if (!wdc)
printf(" drive %d", wa->wa_drive);
return QUIET;
}
void
wdcattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct wdc_softc *wdc = (void *)self;
struct isa_attach_args *ia = aux;
struct wdc_attach_args wa;
TAILQ_INIT(&wdc->sc_drives);
wdc->sc_drq = ia->ia_drq;
printf("\n");
wdc->sc_ih = isa_intr_establish(ia->ia_irq, IST_EDGE, IPL_BIO, wdcintr,
wdc);
for (wa.wa_drive = 0; wa.wa_drive < 2; wa.wa_drive++)
(void)config_found(self, (void *)&wa, wdprint);
}
int
wdprobe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct wdc_softc *wdc = (void *)parent;
struct cfdata *cf = match;
struct wdc_attach_args *wa = aux;
int drive = wa->wa_drive;
if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != drive)
return 0;
if (wdcommandshort(wdc, drive, WDCC_RECAL) != 0 ||
wait_for_ready(wdc) != 0)
return 0;
return 1;
}
void
wdattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct wd_softc *wd = (void *)self;
struct wdc_softc *wdc = (void *)parent;
struct wdc_attach_args *wa = aux;
int i, blank;
char buf[41], c, *p, *q;
wd->sc_drive = wa->wa_drive;
/*
* Initialize and attach the disk structure.
*/
wd->sc_dk.dk_driver = &wddkdriver;
wd->sc_dk.dk_name = wd->sc_dev.dv_xname;
disk_attach(&wd->sc_dk);
wd_get_parms(wd);
for (blank = 0, p = wd->sc_params.wdp_model, q = buf, i = 0;
i < sizeof(wd->sc_params.wdp_model); i++) {
c = *p++;
if (c == '\0')
break;
if (c != ' ') {
if (blank) {
*q++ = ' ';
blank = 0;
}
*q++ = c;
} else
blank = 1;
}
*q++ = '\0';
printf(": %dMB, %d cyl, %d head, %d sec, %d bytes/sec <%s>\n",
wd->sc_params.wdp_cylinders *
(wd->sc_params.wdp_heads * wd->sc_params.wdp_sectors) /
(1048576 / DEV_BSIZE),
wd->sc_params.wdp_cylinders,
wd->sc_params.wdp_heads,
wd->sc_params.wdp_sectors,
DEV_BSIZE,
buf);
if ((wd->sc_params.wdp_capabilities & WD_CAP_DMA) != 0 &&
wdc->sc_drq != DRQUNK) {
wd->sc_mode = WDM_DMA;
} else if (wd->sc_params.wdp_maxmulti > 1) {
wd->sc_mode = WDM_PIOMULTI;
wd->sc_multiple = min(wd->sc_params.wdp_maxmulti, 16);
} else {
wd->sc_mode = WDM_PIOSINGLE;
wd->sc_multiple = 1;
}
printf("%s: using", wd->sc_dev.dv_xname);
if (wd->sc_mode == WDM_DMA)
printf(" dma transfers,");
else
printf(" %d-sector %d-bit pio transfers,",
wd->sc_multiple, (wd->sc_flags & WDF_32BIT) == 0 ? 16 : 32);
if ((wd->sc_params.wdp_capabilities & WD_CAP_LBA) != 0)
printf(" lba addressing\n");
else
printf(" chs addressing\n");
}
/*
* Read/write routine for a buffer. Validates the arguments and schedules the
* transfer. Does not wait for the transfer to complete.
*/
void
wdstrategy(bp)
struct buf *bp;
{
struct wd_softc *wd = wdcd.cd_devs[WDUNIT(bp->b_dev)];
int s;
/* Valid request? */
if (bp->b_blkno < 0 ||
(bp->b_bcount % wd->sc_dk.dk_label->d_secsize) != 0 ||
(bp->b_bcount / wd->sc_dk.dk_label->d_secsize) >= (1 << NBBY)) {
bp->b_error = EINVAL;
goto bad;
}
/* If device invalidated (e.g. media change, door open), error. */
if ((wd->sc_flags & WDF_LOADED) == 0) {
bp->b_error = EIO;
goto bad;
}
/* If it's a null transfer, return immediately. */
if (bp->b_bcount == 0)
goto done;
/*
* Do bounds checking, adjust transfer. if error, process.
* If end of partition, just return.
*/
if (WDPART(bp->b_dev) != RAW_PART &&
bounds_check_with_label(bp, wd->sc_dk.dk_label,
(wd->sc_flags & (WDF_WLABEL|WDF_LABELLING)) != 0) <= 0)
goto done;
/* Queue transfer on drive, activate drive and controller if idle. */
s = splbio();
disksort(&wd->sc_q, bp);
if (!wd->sc_q.b_active)
wdstart(wd);
#if 0
else {
struct wdc_softc *wdc = (void *)wd->sc_dev.dv_parent;
if ((wdc->sc_flags & (WDCF_ACTIVE|WDCF_ERROR)) == 0) {
printf("wdstrategy: controller inactive\n");
wdcstart(wdc);
}
}
#endif
splx(s);
return;
bad:
bp->b_flags |= B_ERROR;
done:
/* Toss transfer; we're done early. */
bp->b_resid = bp->b_bcount;
biodone(bp);
}
/*
* Queue a drive for I/O.
*/
void
wdstart(wd)
struct wd_softc *wd;
{
struct wdc_softc *wdc = (void *)wd->sc_dev.dv_parent;
int active = wdc->sc_drives.tqh_first != 0;
/* Link onto controller queue. */
wd->sc_q.b_active = 1;
TAILQ_INSERT_TAIL(&wdc->sc_drives, wd, sc_drivechain);
disk_busy(&wd->sc_dk);
/* If controller not already active, start it. */
if (!active)
wdcstart(wdc);
}
/*
* Finish an I/O operation. Clean up the drive and controller state, set the
* residual count, and inform the upper layers that the operation is complete.
*/
void
wdfinish(wd, bp)
struct wd_softc *wd;
struct buf *bp;
{
struct wdc_softc *wdc = (void *)wd->sc_dev.dv_parent;
wdc->sc_flags &= ~(WDCF_SINGLE | WDCF_ERROR);
wdc->sc_errors = 0;
/*
* Move this drive to the end of the queue to give others a `fair'
* chance.
*/
if (wd->sc_drivechain.tqe_next) {
TAILQ_REMOVE(&wdc->sc_drives, wd, sc_drivechain);
if (bp->b_actf) {
TAILQ_INSERT_TAIL(&wdc->sc_drives, wd, sc_drivechain);
} else
wd->sc_q.b_active = 0;
}
bp->b_resid = wd->sc_bcount;
wd->sc_skip = 0;
wd->sc_q.b_actf = bp->b_actf;
disk_unbusy(&wd->sc_dk, (bp->b_bcount - bp->b_resid));
if (!wd->sc_q.b_actf) {
TAILQ_REMOVE(&wdc->sc_drives, wd, sc_drivechain);
wd->sc_q.b_active = 0;
} else
disk_busy(&wd->sc_dk);
biodone(bp);
}
int
wdread(dev, uio)
dev_t dev;
struct uio *uio;
{
return (physio(wdstrategy, NULL, dev, B_READ, minphys, uio));
}
int
wdwrite(dev, uio)
dev_t dev;
struct uio *uio;
{
return (physio(wdstrategy, NULL, dev, B_WRITE, minphys, uio));
}
/*
* Start I/O on a controller. This does the calculation, and starts a read or
* write operation. Called to from wdstart() to start a transfer, from
* wdcintr() to continue a multi-sector transfer or start the next transfer, or
* wdcrestart() after recovering from an error.
*/
void
wdcstart(wdc)
struct wdc_softc *wdc;
{
struct wd_softc *wd;
struct buf *bp;
struct disklabel *lp;
int nblks;
#ifdef DIAGNOSTIC
if ((wdc->sc_flags & WDCF_ACTIVE) != 0)
panic("wdcstart: controller still active");
#endif
/*
* XXX
* This is a kluge. See comments in wd_get_parms().
*/
if ((wdc->sc_flags & WDCF_WANTED) != 0) {
wdc->sc_flags &= ~WDCF_WANTED;
wakeup(wdc);
return;
}
loop:
/* Is there a drive for the controller to do a transfer with? */
wd = wdc->sc_drives.tqh_first;
if (wd == NULL)
return;
/* Is there a transfer to this drive? If not, deactivate drive. */
bp = wd->sc_q.b_actf;
if (wdc->sc_errors >= WDIORETRIES) {
wderror(wd, bp, "hard error");
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
wdfinish(wd, bp);
goto loop;
}
/* Do control operations specially. */
if (wd->sc_state < OPEN) {
/*
* Actually, we want to be careful not to mess with the control
* state if the device is currently busy, but we can assume
* that we never get to this point if that's the case.
*/
if (wdcontrol(wd) == 0) {
/* The drive is busy. Wait. */
return;
}
}
/*
* WDCF_ERROR is set by wdcunwedge() and wdcintr() when an error is
* encountered. If we are in multi-sector mode, then we switch to
* single-sector mode and retry the operation from the start.
*/
if (wdc->sc_flags & WDCF_ERROR) {
wdc->sc_flags &= ~WDCF_ERROR;
if ((wdc->sc_flags & WDCF_SINGLE) == 0) {
wdc->sc_flags |= WDCF_SINGLE;
wd->sc_skip = 0;
}
}
lp = wd->sc_dk.dk_label;
/* When starting a transfer... */
if (wd->sc_skip == 0) {
int part = WDPART(bp->b_dev);
daddr_t blkno;
#ifdef WDDEBUG
printf("\n%s: wdcstart %s %d@%d; map ", wd->sc_dev.dv_xname,
(bp->b_flags & B_READ) ? "read" : "write", bp->b_bcount,
bp->b_blkno);
#endif
wd->sc_bcount = bp->b_bcount;
blkno = bp->b_blkno;
if (part != RAW_PART)
blkno += lp->d_partitions[part].p_offset;
wd->sc_blkno = blkno / (lp->d_secsize / DEV_BSIZE);
} else {
#ifdef WDDEBUG
printf(" %d)%x", wd->sc_skip, inb(wd->sc_iobase+wd_altsts));
#endif
}
/* When starting a multi-sector transfer, or doing single-sector
transfers... */
if (wd->sc_skip == 0 || (wdc->sc_flags & WDCF_SINGLE) != 0 ||
wd->sc_mode == WDM_DMA) {
daddr_t blkno = wd->sc_blkno;
long cylin, head, sector;
int command;
if ((wdc->sc_flags & WDCF_SINGLE) != 0)
nblks = 1;
else if (wd->sc_mode != WDM_DMA)
nblks = wd->sc_bcount / lp->d_secsize;
else
nblks = min(wd->sc_bcount / lp->d_secsize, 8);
/* Check for bad sectors and adjust transfer, if necessary. */
if ((lp->d_flags & D_BADSECT) != 0
#ifdef B_FORMAT
&& (bp->b_flags & B_FORMAT) == 0
#endif
) {
long blkdiff;
int i;
for (i = 0; (blkdiff = wd->sc_badsect[i]) != -1; i++) {
blkdiff -= blkno;
if (blkdiff < 0)
continue;
if (blkdiff == 0) {
/* Replace current block of transfer. */
blkno =
lp->d_secperunit - lp->d_nsectors - i - 1;
}
if (blkdiff < nblks) {
/* Bad block inside transfer. */
wdc->sc_flags |= WDCF_SINGLE;
nblks = 1;
}
break;
}
/* Tranfer is okay now. */
}
if ((wd->sc_params.wdp_capabilities & WD_CAP_LBA) != 0) {
sector = (blkno >> 0) & 0xff;
cylin = (blkno >> 8) & 0xffff;
head = (blkno >> 24) & 0xf;
head |= WDSD_LBA;
} else {
sector = blkno % lp->d_nsectors;
sector++; /* Sectors begin with 1, not 0. */
blkno /= lp->d_nsectors;
head = blkno % lp->d_ntracks;
blkno /= lp->d_ntracks;
cylin = blkno;
head |= WDSD_CHS;
}
if (wd->sc_mode == WDM_PIOSINGLE ||
(wdc->sc_flags & WDCF_SINGLE) != 0)
wd->sc_nblks = 1;
else if (wd->sc_mode == WDM_PIOMULTI)
wd->sc_nblks = min(nblks, wd->sc_multiple);
else
wd->sc_nblks = nblks;
wd->sc_nbytes = wd->sc_nblks * lp->d_secsize;
#ifdef B_FORMAT
if (bp->b_flags & B_FORMAT) {
sector = lp->d_gap3;
nblks = lp->d_nsectors;
command = WDCC_FORMAT;
} else
#endif
switch (wd->sc_mode) {
case WDM_DMA:
command = (bp->b_flags & B_READ) ?
WDCC_READDMA : WDCC_WRITEDMA;
/* Start the DMA channel and bounce the buffer if
necessary. */
isa_dmastart(
bp->b_flags & B_READ ? DMAMODE_READ : DMAMODE_WRITE,
bp->b_data + wd->sc_skip,
wd->sc_nbytes, wdc->sc_drq);
break;
case WDM_PIOMULTI:
command = (bp->b_flags & B_READ) ?
WDCC_READMULTI : WDCC_WRITEMULTI;
break;
case WDM_PIOSINGLE:
command = (bp->b_flags & B_READ) ?
WDCC_READ : WDCC_WRITE;
break;
}
/* Initiate command! */
if (wdcommand(wd, command, cylin, head, sector, nblks) != 0) {
wderror(wd, NULL,
"wdcstart: timeout waiting for unbusy");
wdcunwedge(wdc);
return;
}
#ifdef WDDEBUG
printf("sector %d cylin %d head %d addr %x sts %x\n", sector,
cylin, head, bp->b_data, inb(wd->sc_iobase+wd_altsts));
#endif
} else if (wd->sc_nblks > 1) {
/* The number of blocks in the last stretch may be smaller. */
nblks = wd->sc_bcount / lp->d_secsize;
if (wd->sc_nblks > nblks) {
wd->sc_nblks = nblks;
wd->sc_nbytes = wd->sc_bcount;
}
}
/* If this was a write and not using DMA, push the data. */
if (wd->sc_mode != WDM_DMA &&
(bp->b_flags & (B_READ|B_WRITE)) == B_WRITE) {
if (wait_for_drq(wdc) < 0) {
wderror(wd, NULL, "wdcstart: timeout waiting for drq");
wdcunwedge(wdc);
return;
}
/* Push out data. */
if ((wd->sc_flags & WDF_32BIT) == 0)
outsw(wdc->sc_iobase+wd_data, bp->b_data + wd->sc_skip,
wd->sc_nbytes >> 1);
else
outsl(wdc->sc_iobase+wd_data, bp->b_data + wd->sc_skip,
wd->sc_nbytes >> 2);
}
wdc->sc_flags |= WDCF_ACTIVE;
timeout(wdctimeout, wdc, WAITTIME);
}
/*
* 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.
*/
int
wdcintr(arg)
void *arg;
{
struct wdc_softc *wdc = arg;
struct wd_softc *wd;
struct buf *bp;
if ((wdc->sc_flags & WDCF_ACTIVE) == 0) {
/* Clear the pending interrupt and abort. */
(void) inb(wdc->sc_iobase+wd_status);
return 0;
}
wdc->sc_flags &= ~WDCF_ACTIVE;
untimeout(wdctimeout, wdc);
wd = wdc->sc_drives.tqh_first;
bp = wd->sc_q.b_actf;
#ifdef WDDEBUG
printf("I%d ", ctrlr);
#endif
if (wait_for_unbusy(wdc) < 0) {
wderror(wd, NULL, "wdcintr: timeout waiting for unbusy");
wdc->sc_status |= WDCS_ERR; /* XXX */
}
/* Is it not a transfer, but a control operation? */
if (wd->sc_state < OPEN) {
if (wdcontrol(wd) == 0) {
/* The drive is busy. Wait. */
return 1;
}
wdcstart(wdc);
return 1;
}
/* Turn off the DMA channel and unbounce the buffer. */
if (wd->sc_mode == WDM_DMA)
isa_dmadone(bp->b_flags & B_READ ? DMAMODE_READ : DMAMODE_WRITE,
bp->b_data + wd->sc_skip, wd->sc_nbytes, wdc->sc_drq);
/* Have we an error? */
if (wdc->sc_status & WDCS_ERR) {
lose:
#ifdef WDDEBUG
wderror(wd, NULL, "wdcintr");
#endif
if ((wdc->sc_flags & WDCF_SINGLE) == 0) {
wdc->sc_flags |= WDCF_ERROR;
goto restart;
}
#ifdef B_FORMAT
if (bp->b_flags & B_FORMAT)
goto bad;
#endif
if (++wdc->sc_errors < WDIORETRIES)
goto restart;
wderror(wd, bp, "hard error");
bad:
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
goto done;
}
/* If this was a read and not using DMA, fetch the data. */
if (wd->sc_mode != WDM_DMA &&
(bp->b_flags & (B_READ|B_WRITE)) == B_READ) {
if ((wdc->sc_status & (WDCS_DRDY | WDCS_DSC | WDCS_DRQ))
!= (WDCS_DRDY | WDCS_DSC | WDCS_DRQ)) {
wderror(wd, NULL, "wdcintr: read intr before drq");
wdcunwedge(wdc);
return 1;
}
/* Pull in data. */
if ((wd->sc_flags & WDF_32BIT) == 0)
insw(wdc->sc_iobase+wd_data, bp->b_data + wd->sc_skip,
wd->sc_nbytes >> 1);
else
insl(wdc->sc_iobase+wd_data, bp->b_data + wd->sc_skip,
wd->sc_nbytes >> 2);
}
/* If we encountered any abnormalities, flag it as a soft error. */
if (wdc->sc_errors > 0 ||
(wdc->sc_status & WDCS_CORR) != 0) {
wderror(wd, bp, "soft error (corrected)");
wdc->sc_errors = 0;
}
/* Adjust pointers for the next block, if any. */
wd->sc_blkno += wd->sc_nblks;
wd->sc_skip += wd->sc_nbytes;
wd->sc_bcount -= wd->sc_nbytes;
/* See if this transfer is complete. */
if (wd->sc_bcount > 0)
goto restart;
done:
/* Done with this transfer, with or without error. */
wdfinish(wd, bp);
restart:
/* Start the next operation, if any. */
wdcstart(wdc);
return 1;
}
/*
* Wait interruptibly for an exclusive lock.
*
* XXX
* Several drivers do this; it should be abstracted and made MP-safe.
*/
int
wdlock(wd)
struct wd_softc *wd;
{
int error;
while ((wd->sc_flags & WDF_LOCKED) != 0) {
wd->sc_flags |= WDF_WANTED;
if ((error = tsleep(wd, PRIBIO | PCATCH, "wdlck", 0)) != 0)
return error;
}
wd->sc_flags |= WDF_LOCKED;
return 0;
}
/*
* Unlock and wake up any waiters.
*/
void
wdunlock(wd)
struct wd_softc *wd;
{
wd->sc_flags &= ~WDF_LOCKED;
if ((wd->sc_flags & WDF_WANTED) != 0) {
wd->sc_flags &= ~WDF_WANTED;
wakeup(wd);
}
}
int
wdopen(dev, flag, fmt)
dev_t dev;
int flag, fmt;
{
struct wd_softc *wd;
int unit, part;
int error;
unit = WDUNIT(dev);
if (unit >= wdcd.cd_ndevs)
return ENXIO;
wd = wdcd.cd_devs[unit];
if (wd == 0)
return ENXIO;
if (error = wdlock(wd))
return error;
if (wd->sc_dk.dk_openmask != 0) {
/*
* If any partition is open, but the disk has been invalidated,
* disallow further opens.
*/
if ((wd->sc_flags & WDF_LOADED) == 0) {
error = EIO;
goto bad3;
}
} else {
if ((wd->sc_flags & WDF_LOADED) == 0) {
wd->sc_flags |= WDF_LOADED;
/* Load the physical device parameters. */
if (wd_get_parms(wd) != 0) {
error = ENXIO;
goto bad2;
}
/* Load the partition info if not already loaded. */
wdgetdisklabel(wd);
}
}
part = WDPART(dev);
/* Check that the partition exists. */
if (part != RAW_PART &&
(part >= wd->sc_dk.dk_label->d_npartitions ||
wd->sc_dk.dk_label->d_partitions[part].p_fstype == FS_UNUSED)) {
error = ENXIO;
goto bad;
}
/* Insure only one open at a time. */
switch (fmt) {
case S_IFCHR:
wd->sc_dk.dk_copenmask |= (1 << part);
break;
case S_IFBLK:
wd->sc_dk.dk_bopenmask |= (1 << part);
break;
}
wd->sc_dk.dk_openmask = wd->sc_dk.dk_copenmask | wd->sc_dk.dk_bopenmask;
wdunlock(wd);
return 0;
bad2:
wd->sc_flags &= ~WDF_LOADED;
bad:
if (wd->sc_dk.dk_openmask == 0) {
}
bad3:
wdunlock(wd);
return error;
}
int
wdclose(dev, flag, fmt)
dev_t dev;
int flag, fmt;
{
struct wd_softc *wd = wdcd.cd_devs[WDUNIT(dev)];
int part = WDPART(dev);
int error;
if (error = wdlock(wd))
return error;
switch (fmt) {
case S_IFCHR:
wd->sc_dk.dk_copenmask &= ~(1 << part);
break;
case S_IFBLK:
wd->sc_dk.dk_bopenmask &= ~(1 << part);
break;
}
wd->sc_dk.dk_openmask = wd->sc_dk.dk_copenmask | wd->sc_dk.dk_bopenmask;
if (wd->sc_dk.dk_openmask == 0) {
/* XXXX Must wait for I/O to complete! */
}
wdunlock(wd);
return 0;
}
/*
* Fabricate a default disk label, and try to read the correct one.
*/
void
wdgetdisklabel(wd)
struct wd_softc *wd;
{
struct disklabel *lp = wd->sc_dk.dk_label;
char *errstring;
bzero(lp, sizeof(struct disklabel));
bzero(wd->sc_dk.dk_cpulabel, sizeof(struct cpu_disklabel));
lp->d_secsize = DEV_BSIZE;
lp->d_ntracks = wd->sc_params.wdp_heads;
lp->d_nsectors = wd->sc_params.wdp_sectors;
lp->d_ncylinders = wd->sc_params.wdp_cylinders;
lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
#if 0
strncpy(lp->d_typename, "ST506 disk", 16);
lp->d_type = DTYPE_ST506;
#endif
strncpy(lp->d_packname, wd->sc_params.wdp_model, 16);
lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
lp->d_rpm = 3600;
lp->d_interleave = 1;
lp->d_flags = 0;
lp->d_partitions[RAW_PART].p_offset = 0;
lp->d_partitions[RAW_PART].p_size =
lp->d_secperunit * (lp->d_secsize / DEV_BSIZE);
lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED;
lp->d_npartitions = RAW_PART + 1;
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = dkcksum(lp);
wd->sc_badsect[0] = -1;
if (wd->sc_state > RECAL)
wd->sc_state = RECAL;
errstring = readdisklabel(MAKEWDDEV(0, wd->sc_dev.dv_unit, RAW_PART),
wdstrategy, lp, wd->sc_dk.dk_cpulabel);
if (errstring) {
/*
* This probably happened because the drive's default
* geometry doesn't match the DOS geometry. We
* assume the DOS geometry is now in the label and try
* again. XXX This is a kluge.
*/
if (wd->sc_state > GEOMETRY)
wd->sc_state = GEOMETRY;
errstring = readdisklabel(MAKEWDDEV(0, wd->sc_dev.dv_unit, RAW_PART),
wdstrategy, lp, wd->sc_dk.dk_cpulabel);
}
if (errstring) {
printf("%s: %s\n", wd->sc_dev.dv_xname, errstring);
return;
}
if (wd->sc_state > GEOMETRY)
wd->sc_state = GEOMETRY;
if ((lp->d_flags & D_BADSECT) != 0)
bad144intern(wd);
}
/*
* Implement operations needed before read/write.
* Returns 0 if operation still in progress, 1 if completed.
*/
int
wdcontrol(wd)
struct wd_softc *wd;
{
struct wdc_softc *wdc = (void *)wd->sc_dev.dv_parent;
switch (wd->sc_state) {
case RECAL: /* Set SDH, step rate, do recal. */
if (wdcommandshort(wdc, wd->sc_drive, WDCC_RECAL) != 0) {
wderror(wd, NULL, "wdcontrol: recal failed (1)");
goto bad;
}
wd->sc_state = RECAL_WAIT;
break;
case RECAL_WAIT:
if (wdc->sc_status & WDCS_ERR) {
wderror(wd, NULL, "wdcontrol: recal failed (2)");
goto bad;
}
/* fall through */
case GEOMETRY:
if ((wd->sc_params.wdp_capabilities & WD_CAP_LBA) != 0)
goto multimode;
if (wdsetctlr(wd) != 0) {
/* Already printed a message. */
goto bad;
}
wd->sc_state = GEOMETRY_WAIT;
break;
case GEOMETRY_WAIT:
if (wdc->sc_status & WDCS_ERR) {
wderror(wd, NULL, "wdcontrol: geometry failed");
goto bad;
}
/* fall through */
case MULTIMODE:
multimode:
if (wd->sc_mode != WDM_PIOMULTI)
goto open;
outb(wdc->sc_iobase+wd_seccnt, wd->sc_multiple);
if (wdcommandshort(wdc, wd->sc_drive, WDCC_SETMULTI) != 0) {
wderror(wd, NULL, "wdcontrol: setmulti failed (1)");
goto bad;
}
wd->sc_state = MULTIMODE_WAIT;
break;
case MULTIMODE_WAIT:
if (wdc->sc_status & WDCS_ERR) {
wderror(wd, NULL, "wdcontrol: setmulti failed (2)");
goto bad;
}
/* fall through */
case OPEN:
open:
wdc->sc_errors = 0;
wd->sc_state = OPEN;
/*
* The rest of the initialization can be done by normal means.
*/
return 1;
bad:
wdcunwedge(wdc);
return 0;
}
wdc->sc_flags |= WDCF_ACTIVE;
timeout(wdctimeout, wdc, WAITTIME);
return 0;
}
/*
* Wait for the drive to become ready and send a command.
* Return -1 if busy for too long or 0 otherwise.
* Assumes interrupts are blocked.
*/
int
wdcommand(wd, command, cylin, head, sector, count)
struct wd_softc *wd;
int command;
int cylin, head, sector, count;
{
struct wdc_softc *wdc = (void *)wd->sc_dev.dv_parent;
int iobase = wdc->sc_iobase;
int stat;
/* Select drive, head, and addressing mode. */
outb(iobase+wd_sdh, WDSD_IBM | (wd->sc_drive << 4) | head);
/* Wait for it to become ready to accept a command. */
if (command == WDCC_IDP)
stat = wait_for_unbusy(wdc);
else
stat = wdcwait(wdc, WDCS_DRDY);
if (stat < 0)
return -1;
/* Load parameters. */
if (wd->sc_dk.dk_label->d_type == DTYPE_ST506)
outb(iobase+wd_precomp, wd->sc_dk.dk_label->d_precompcyl / 4);
else
outb(iobase+wd_features, 0);
outb(iobase+wd_cyl_lo, cylin);
outb(iobase+wd_cyl_hi, cylin >> 8);
outb(iobase+wd_sector, sector);
outb(iobase+wd_seccnt, count);
/* Send command. */
outb(iobase+wd_command, command);
return 0;
}
/*
* Simplified version of wdcommand().
*/
int
wdcommandshort(wdc, drive, command)
struct wdc_softc *wdc;
int drive;
int command;
{
int iobase = wdc->sc_iobase;
/* Select drive. */
outb(iobase+wd_sdh, WDSD_IBM | (drive << 4));
if (wdcwait(wdc, WDCS_DRDY) < 0)
return -1;
outb(iobase+wd_command, command);
return 0;
}
/*
* Tell the drive what geometry to use.
*/
int
wdsetctlr(wd)
struct wd_softc *wd;
{
struct wdc_softc *wdc = (void *)wd->sc_dev.dv_parent;
#ifdef WDDEBUG
printf("wd(%d,%d) C%dH%dS%d\n", wd->sc_dev.dv_unit, wd->sc_drive,
wd->sc_dk.dk_label->d_ncylinders, wd->sc_dk.dk_label->d_ntracks,
wd->sc_dk.dk_label->d_nsectors);
#endif
if (wdcommand(wd, WDCC_IDP, wd->sc_dk.dk_label->d_ncylinders,
wd->sc_dk.dk_label->d_ntracks - 1, 0,
wd->sc_dk.dk_label->d_nsectors) != 0) {
wderror(wd, NULL, "wdsetctlr: geometry upload failed");
return -1;
}
return 0;
}
/*
* Get the drive parameters, if ESDI or ATA, or create fake ones for ST506.
*/
int
wd_get_parms(wd)
struct wd_softc *wd;
{
struct wdc_softc *wdc = (void *)wd->sc_dev.dv_parent;
int i;
char tb[DEV_BSIZE];
int s, error;
/*
* XXX
* The locking done here, and the length of time this may keep the rest
* of the system suspended, is a kluge. This should be rewritten to
* set up a transfer and queue it through wdstart(), but it's called
* infrequently enough that this isn't a pressing matter.
*/
s = splbio();
while ((wdc->sc_flags & WDCF_ACTIVE) != 0) {
wdc->sc_flags |= WDCF_WANTED;
if ((error = tsleep(wdc, PRIBIO | PCATCH, "wdprm", 0)) != 0) {
splx(s);
return error;
}
}
if (wdcommandshort(wdc, wd->sc_drive, WDCC_IDENTIFY) != 0 ||
wait_for_drq(wdc) != 0) {
/*
* We `know' there's a drive here; just assume it's old.
* This geometry is only used to read the MBR and print a
* (false) attach message.
*/
strncpy(wd->sc_dk.dk_label->d_typename, "ST506",
sizeof wd->sc_dk.dk_label->d_typename);
wd->sc_dk.dk_label->d_type = DTYPE_ST506;
strncpy(wd->sc_params.wdp_model, "unknown",
sizeof wd->sc_params.wdp_model);
wd->sc_params.wdp_config = WD_CFG_FIXED;
wd->sc_params.wdp_cylinders = 1024;
wd->sc_params.wdp_heads = 8;
wd->sc_params.wdp_sectors = 17;
wd->sc_params.wdp_maxmulti = 0;
wd->sc_params.wdp_usedmovsd = 0;
wd->sc_params.wdp_capabilities = 0;
} else {
strncpy(wd->sc_dk.dk_label->d_typename, "ESDI/IDE",
sizeof wd->sc_dk.dk_label->d_typename);
wd->sc_dk.dk_label->d_type = DTYPE_ESDI;
/* Read in parameter block. */
insw(wdc->sc_iobase+wd_data, tb, sizeof(tb) / sizeof(short));
bcopy(tb, &wd->sc_params, sizeof(struct wdparams));
/* Shuffle string byte order. */
for (i = 0; i < sizeof(wd->sc_params.wdp_model); i += 2) {
u_short *p;
p = (u_short *)(wd->sc_params.wdp_model + i);
*p = ntohs(*p);
}
}
/* Clear any leftover interrupt. */
(void) inb(wdc->sc_iobase+wd_status);
/* Restart the queue. */
wdcstart(wdc);
splx(s);
return 0;
}
int
wdioctl(dev, cmd, addr, flag, p)
dev_t dev;
u_long cmd;
caddr_t addr;
int flag;
struct proc *p;
{
struct wd_softc *wd = wdcd.cd_devs[WDUNIT(dev)];
int error;
if ((wd->sc_flags & WDF_LOADED) == 0)
return EIO;
switch (cmd) {
case DIOCSBAD:
if ((flag & FWRITE) == 0)
return EBADF;
wd->sc_dk.dk_cpulabel->bad = *(struct dkbad *)addr;
wd->sc_dk.dk_label->d_flags |= D_BADSECT;
bad144intern(wd);
return 0;
case DIOCGDINFO:
*(struct disklabel *)addr = *(wd->sc_dk.dk_label);
return 0;
case DIOCGPART:
((struct partinfo *)addr)->disklab = wd->sc_dk.dk_label;
((struct partinfo *)addr)->part =
&wd->sc_dk.dk_label->d_partitions[WDPART(dev)];
return 0;
case DIOCWDINFO:
case DIOCSDINFO:
if ((flag & FWRITE) == 0)
return EBADF;
if (error = wdlock(wd))
return error;
wd->sc_flags |= WDF_LABELLING;
error = setdisklabel(wd->sc_dk.dk_label,
(struct disklabel *)addr, /*wd->sc_dk.dk_openmask : */0,
wd->sc_dk.dk_cpulabel);
if (error == 0) {
if (wd->sc_state > GEOMETRY)
wd->sc_state = GEOMETRY;
if (cmd == DIOCWDINFO)
error = writedisklabel(WDLABELDEV(dev),
wdstrategy, wd->sc_dk.dk_label,
wd->sc_dk.dk_cpulabel);
}
wd->sc_flags &= ~WDF_LABELLING;
wdunlock(wd);
return error;
case DIOCWLABEL:
if ((flag & FWRITE) == 0)
return EBADF;
if (*(int *)addr)
wd->sc_flags |= WDF_WLABEL;
else
wd->sc_flags &= ~WDF_WLABEL;
return 0;
#ifdef notyet
case DIOCWFORMAT:
if ((flag & FWRITE) == 0)
return EBADF;
{
register struct format_op *fop;
struct iovec aiov;
struct uio auio;
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 * wd->sc_dk.dk_label->d_secsize;
auio.uio_procp = p;
error = physio(wdformat, NULL, dev, B_WRITE, minphys,
&auio);
fop->df_count -= auio.uio_resid;
fop->df_reg[0] = wdc->sc_status;
fop->df_reg[1] = wdc->sc_error;
return error;
}
#endif
default:
return ENOTTY;
}
#ifdef DIAGNOSTIC
panic("wdioctl: impossible");
#endif
}
#ifdef B_FORMAT
int
wdformat(struct buf *bp)
{
bp->b_flags |= B_FORMAT;
return wdstrategy(bp);
}
#endif
int
wdsize(dev)
dev_t dev;
{
struct wd_softc *wd;
int part;
int size;
if (wdopen(dev, 0, S_IFBLK) != 0)
return -1;
wd = wdcd.cd_devs[WDUNIT(dev)];
part = WDPART(dev);
if (wd->sc_dk.dk_label->d_partitions[part].p_fstype != FS_SWAP)
size = -1;
else
size = wd->sc_dk.dk_label->d_partitions[part].p_size;
if (wdclose(dev, 0, S_IFBLK) != 0)
return -1;
return size;
}
#ifndef __BDEVSW_DUMP_OLD_TYPE
/* #define WD_DUMP_NOT_TRUSTED if you just want to watch */
static int wddoingadump;
static int wddumprecalibrated;
/*
* Dump core after a system crash.
*/
int
wddump(dev, blkno, va, size)
dev_t dev;
daddr_t blkno;
caddr_t va;
size_t size;
{
struct wd_softc *wd; /* disk unit to do the I/O */
struct wdc_softc *wdc; /* disk controller to do the I/O */
struct disklabel *lp; /* disk's disklabel */
int unit, part;
int nblks; /* total number of sectors left to write */
/* Check if recursive dump; if so, punt. */
if (wddoingadump)
return EFAULT;
wddoingadump = 1;
unit = WDUNIT(dev);
if (unit >= wdcd.cd_ndevs)
return ENXIO;
wd = wdcd.cd_devs[unit];
if (wd == 0)
return ENXIO;
part = WDPART(dev);
/* Make sure it was initialized. */
if (wd->sc_state < OPEN)
return ENXIO;
wdc = (void *)wd->sc_dev.dv_parent;
/* Convert to disk sectors. Request must be a multiple of size. */
lp = wd->sc_dk.dk_label;
if ((size % lp->d_secsize) != 0)
return EFAULT;
nblks = size / lp->d_secsize;
blkno = blkno / (lp->d_secsize / DEV_BSIZE);
/* Check transfer bounds against partition size. */
if ((blkno < 0) || ((blkno + nblks) > lp->d_partitions[part].p_size))
return EINVAL;
/* Offset block number to start of partition. */
blkno += lp->d_partitions[part].p_offset;
/* Recalibrate, if first dump transfer. */
if (wddumprecalibrated == 0) {
wddumprecalibrated = 1;
if (wdcommandshort(wdc, wd->sc_drive, WDCC_RECAL) != 0 ||
wait_for_ready(wdc) != 0 || wdsetctlr(wd) != 0 ||
wait_for_ready(wdc) != 0) {
wderror(wd, NULL, "wddump: recal failed");
return EIO;
}
}
while (nblks > 0) {
daddr_t xlt_blkno = blkno;
long cylin, head, sector;
if ((lp->d_flags & D_BADSECT) != 0) {
long blkdiff;
int i;
for (i = 0; (blkdiff = wd->sc_badsect[i]) != -1; i++) {
blkdiff -= xlt_blkno;
if (blkdiff < 0)
continue;
if (blkdiff == 0) {
/* Replace current block of transfer. */
xlt_blkno = lp->d_secperunit -
lp->d_nsectors - i - 1;
}
break;
}
/* Tranfer is okay now. */
}
if ((wd->sc_params.wdp_capabilities & WD_CAP_LBA) != 0) {
sector = (xlt_blkno >> 0) & 0xff;
cylin = (xlt_blkno >> 8) & 0xffff;
head = (xlt_blkno >> 24) & 0xf;
head |= WDSD_LBA;
} else {
sector = xlt_blkno % lp->d_nsectors;
sector++; /* Sectors begin with 1, not 0. */
xlt_blkno /= lp->d_nsectors;
head = xlt_blkno % lp->d_ntracks;
xlt_blkno /= lp->d_ntracks;
cylin = xlt_blkno;
head |= WDSD_CHS;
}
#ifndef WD_DUMP_NOT_TRUSTED
if (wdcommand(wd, WDCC_WRITE, cylin, head, sector, 1) != 0 ||
wait_for_drq(wdc) != 0) {
wderror(wd, NULL, "wddump: write failed");
return EIO;
}
outsw(wdc->sc_iobase+wd_data, va, lp->d_secsize >> 1);
/* Check data request (should be done). */
if (wait_for_ready(wdc) != 0) {
wderror(wd, NULL, "wddump: timeout waiting for ready");
return EIO;
}
#else /* WD_DUMP_NOT_TRUSTED */
/* Let's just talk about this first... */
printf("wd%d: dump addr 0x%x, cylin %d, head %d, sector %d\n",
unit, va, cylin, head, sector);
delay(500 * 1000); /* half a second */
#endif
/* update block count */
nblks -= 1;
blkno += 1;
va += lp->d_secsize;
}
wddoingadump = 0;
return 0;
}
#else /* __BDEVSW_DUMP_NEW_TYPE */
int
wddump(dev, blkno, va, size)
dev_t dev;
daddr_t blkno;
caddr_t va;
size_t size;
{
/* Not implemented. */
return ENXIO;
}
#endif /* __BDEVSW_DUMP_NEW_TYPE */
/*
* Internalize the bad sector table.
*/
void
bad144intern(wd)
struct wd_softc *wd;
{
struct dkbad *bt = &wd->sc_dk.dk_cpulabel->bad;
struct disklabel *lp = wd->sc_dk.dk_label;
int i = 0;
for (; i < 126; i++) {
if (bt->bt_bad[i].bt_cyl == 0xffff)
break;
wd->sc_badsect[i] =
bt->bt_bad[i].bt_cyl * lp->d_secpercyl +
(bt->bt_bad[i].bt_trksec >> 8) * lp->d_nsectors +
(bt->bt_bad[i].bt_trksec & 0xff);
}
for (; i < 127; i++)
wd->sc_badsect[i] = -1;
}
int
wdcreset(wdc)
struct wdc_softc *wdc;
{
int iobase = wdc->sc_iobase;
/* Reset the device. */
outb(iobase+wd_ctlr, WDCTL_RST | WDCTL_IDS);
delay(1000);
outb(iobase+wd_ctlr, WDCTL_IDS);
delay(1000);
(void) inb(iobase+wd_error);
outb(iobase+wd_ctlr, WDCTL_4BIT);
if (wait_for_unbusy(wdc) < 0) {
printf("%s: reset failed\n", wdc->sc_dev.dv_xname);
return 1;
}
return 0;
}
void
wdcrestart(arg)
void *arg;
{
struct wdc_softc *wdc = arg;
int s;
s = splbio();
wdcstart(wdc);
splx(s);
}
/*
* Unwedge the controller after an unexpected error. We do this by resetting
* it, marking all drives for recalibration, and stalling the queue for a short
* period to give the reset time to finish.
* NOTE: We use a timeout here, so this routine must not be called during
* autoconfig or dump.
*/
void
wdcunwedge(wdc)
struct wdc_softc *wdc;
{
int unit;
untimeout(wdctimeout, wdc);
(void) wdcreset(wdc);
/* Schedule recalibrate for all drives on this controller. */
for (unit = 0; unit < wdcd.cd_ndevs; unit++) {
struct wd_softc *wd = wdcd.cd_devs[unit];
if (!wd || (void *)wd->sc_dev.dv_parent != wdc)
continue;
if (wd->sc_state > RECAL)
wd->sc_state = RECAL;
}
wdc->sc_flags |= WDCF_ERROR;
++wdc->sc_errors;
/* Wake up in a little bit and restart the operation. */
timeout(wdcrestart, wdc, RECOVERYTIME);
}
int
wdcwait(wdc, mask)
struct wdc_softc *wdc;
int mask;
{
int iobase = wdc->sc_iobase;
int timeout = 0;
u_char status;
extern int cold;
for (;;) {
wdc->sc_status = status = inb(iobase+wd_status);
if ((status & WDCS_BSY) == 0 && (status & mask) == mask)
break;
if (++timeout > WDCNDELAY)
return -1;
delay(WDCDELAY);
}
if (status & WDCS_ERR) {
wdc->sc_error = inb(iobase+wd_error);
return WDCS_ERR;
}
#ifdef WDCNDELAY_DEBUG
/* After autoconfig, there should be no long delays. */
if (!cold && timeout > WDCNDELAY_DEBUG)
printf("%s: warning: busy-wait took %dus\n",
wdc->sc_dev.dv_xname, WDCDELAY * timeout);
#endif
return 0;
}
void
wdctimeout(arg)
void *arg;
{
struct wdc_softc *wdc = (struct wdc_softc *)arg;
int s;
s = splbio();
if ((wdc->sc_flags & WDCF_ACTIVE) != 0) {
struct wd_softc *wd = wdc->sc_drives.tqh_first;
struct buf *bp = wd->sc_q.b_actf;
wdc->sc_flags &= ~WDCF_ACTIVE;
wderror(wdc, NULL, "lost interrupt");
printf("%s: lost interrupt: %sing %d@%s:%d\n",
wdc->sc_dev.dv_xname,
(bp->b_flags & B_READ) ? "read" : "writ",
wd->sc_nblks, wd->sc_dev.dv_xname, wd->sc_blkno);
wdcunwedge(wdc);
} else
wderror(wdc, NULL, "missing untimeout");
splx(s);
}
void
wderror(dev, bp, msg)
void *dev;
struct buf *bp;
char *msg;
{
struct wd_softc *wd = dev;
struct wdc_softc *wdc = dev;
if (bp) {
diskerr(bp, "wd", msg, LOG_PRINTF, wd->sc_skip / DEV_BSIZE,
wd->sc_dk.dk_label);
printf("\n");
} else
printf("%s: %s: status %b error %b\n", wdc->sc_dev.dv_xname,
msg, wdc->sc_status, WDCS_BITS, wdc->sc_error, WDERR_BITS);
}
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