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NetBSD/sys/dev/ata/wd.c

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/* $NetBSD: wd.c,v 1.199 1999/12/23 21:23:19 leo Exp $ */
/*
* Copyright (c) 1998 Manuel Bouyer. All rights reserved.
*
* 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 Manuel Bouyer.
* 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.
*/
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum and 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#ifndef WDCDEBUG
#define WDCDEBUG
#endif /* WDCDEBUG */
#include "rnd.h"
#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 <sys/proc.h>
#include <sys/vnode.h>
#if NRND > 0
#include <sys/rnd.h>
#endif
#include <vm/vm.h>
#include <machine/intr.h>
#include <machine/bus.h>
#include <dev/ata/atareg.h>
#include <dev/ata/atavar.h>
#include <dev/ata/wdvar.h>
#include <dev/ic/wdcreg.h>
#include <sys/ataio.h>
#include "locators.h"
#define WAITTIME (4 * hz) /* time to wait for a completion */
#define WDIORETRIES_SINGLE 4 /* number of retries before single-sector */
#define WDIORETRIES 5 /* number of retries before giving up */
#define RECOVERYTIME hz/2 /* time to wait before retrying a cmd */
#define WDUNIT(dev) DISKUNIT(dev)
#define WDPART(dev) DISKPART(dev)
#define WDMINOR(unit, part) DISKMINOR(unit, part)
#define MAKEWDDEV(maj, unit, part) MAKEDISKDEV(maj, unit, part)
#define WDLABELDEV(dev) (MAKEWDDEV(major(dev), WDUNIT(dev), RAW_PART))
#define DEBUG_INTR 0x01
#define DEBUG_XFERS 0x02
#define DEBUG_STATUS 0x04
#define DEBUG_FUNCS 0x08
#define DEBUG_PROBE 0x10
#ifdef WDCDEBUG
extern int wdcdebug_wd_mask; /* init'ed in ata_wdc.c */
#define WDCDEBUG_PRINT(args, level) \
if (wdcdebug_wd_mask & (level)) \
printf args
#else
#define WDCDEBUG_PRINT(args, level)
#endif
struct wd_softc {
/* General disk infos */
struct device sc_dev;
struct disk sc_dk;
struct buf sc_q;
/* IDE disk soft states */
struct ata_bio sc_wdc_bio; /* current transfer */
struct buf *sc_bp; /* buf being transfered */
void *wdc_softc; /* pointer to our parent */
struct ata_drive_datas *drvp; /* Our controller's infos */
int openings;
struct ataparams sc_params;/* drive characteistics found */
int sc_flags;
#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 ATA-4 is
* more fully implemented.
*/
#define WDF_LOADED 0x10 /* parameters loaded */
#define WDF_WAIT 0x20 /* waiting for resources */
#define WDF_LBA 0x40 /* using LBA mode */
#define WDF_KLABEL 0x80 /* retain label after 'full' close */
int sc_capacity;
int cyl; /* actual drive parameters */
int heads;
int sectors;
int retries; /* number of xfer retry */
void *sc_sdhook; /* our shutdown hook */
#if NRND > 0
rndsource_element_t rnd_source;
#endif
};
#define sc_drive sc_wdc_bio.drive
#define sc_mode sc_wdc_bio.mode
#define sc_multi sc_wdc_bio.multi
#define sc_badsect sc_wdc_bio.badsect
int wdprobe __P((struct device *, struct cfdata *, void *));
void wdattach __P((struct device *, struct device *, void *));
int wddetach __P((struct device *, int));
int wdactivate __P((struct device *, enum devact));
int wdprint __P((void *, char *));
struct cfattach wd_ca = {
sizeof(struct wd_softc), wdprobe, wdattach, wddetach, wdactivate
};
extern struct cfdriver wd_cd;
/*
* Glue necessary to hook WDCIOCCOMMAND into physio
*/
struct wd_ioctl {
LIST_ENTRY(wd_ioctl) wi_list;
struct buf wi_bp;
struct uio wi_uio;
struct iovec wi_iov;
atareq_t wi_atareq;
struct wd_softc *wi_softc;
};
LIST_HEAD(, wd_ioctl) wi_head;
struct wd_ioctl *wi_find __P((struct buf *));
void wi_free __P((struct wd_ioctl *));
struct wd_ioctl *wi_get __P((void));
void wdioctlstrategy __P((struct buf *));
void wdgetdefaultlabel __P((struct wd_softc *, struct disklabel *));
void wdgetdisklabel __P((struct wd_softc *));
void wdstrategy __P((struct buf *));
void wdstart __P((void *));
void __wdstart __P((struct wd_softc*, struct buf *));
void wdrestart __P((void*));
int wd_get_params __P((struct wd_softc *, u_int8_t, struct ataparams *));
void wd_flushcache __P((struct wd_softc *, int));
void wd_shutdown __P((void*));
struct dkdriver wddkdriver = { wdstrategy };
/* XXX: these should go elsewhere */
cdev_decl(wd);
bdev_decl(wd);
#ifdef HAS_BAD144_HANDLING
static void bad144intern __P((struct wd_softc *));
#endif
int wdlock __P((struct wd_softc *));
void wdunlock __P((struct wd_softc *));
int
wdprobe(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct ata_atapi_attach *aa_link = aux;
if (aa_link == NULL)
return 0;
if (aa_link->aa_type != T_ATA)
return 0;
if (match->cf_loc[ATACF_CHANNEL] != ATACF_CHANNEL_DEFAULT &&
match->cf_loc[ATACF_CHANNEL] != aa_link->aa_channel)
return 0;
if (match->cf_loc[ATACF_DRIVE] != ATACF_DRIVE_DEFAULT &&
match->cf_loc[ATACF_DRIVE] != aa_link->aa_drv_data->drive)
return 0;
return 1;
}
void
wdattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct wd_softc *wd = (void *)self;
struct ata_atapi_attach *aa_link= aux;
int i, blank;
char buf[41], c, *p, *q;
WDCDEBUG_PRINT(("wdattach\n"), DEBUG_FUNCS | DEBUG_PROBE);
wd->openings = aa_link->aa_openings;
wd->drvp = aa_link->aa_drv_data;;
wd->wdc_softc = parent;
/* give back our softc to our caller */
wd->drvp->drv_softc = &wd->sc_dev;
/* read our drive info */
if (wd_get_params(wd, AT_POLL, &wd->sc_params) != 0) {
printf("%s: IDENTIFY failed\n", wd->sc_dev.dv_xname);
return;
}
for (blank = 0, p = wd->sc_params.atap_model, q = buf, i = 0;
i < sizeof(wd->sc_params.atap_model); i++) {
c = *p++;
if (c == '\0')
break;
if (c != ' ') {
if (blank) {
*q++ = ' ';
blank = 0;
}
*q++ = c;
} else
blank = 1;
}
*q++ = '\0';
printf(": <%s>\n", buf);
if ((wd->sc_params.atap_multi & 0xff) > 1) {
wd->sc_multi = wd->sc_params.atap_multi & 0xff;
} else {
wd->sc_multi = 1;
}
printf("%s: drive supports %d-sector pio transfers,",
wd->sc_dev.dv_xname, wd->sc_multi);
/* Prior to ATA-4, LBA was optional. */
if ((wd->sc_params.atap_capabilities1 & WDC_CAP_LBA) != 0)
wd->sc_flags |= WDF_LBA;
#if 0
/* ATA-4 requires LBA. */
if (wd->sc_params.atap_ataversion != 0xffff &&
wd->sc_params.atap_ataversion >= WDC_VER_ATA4)
wd->sc_flags |= WDF_LBA;
#endif
if ((wd->sc_flags & WDF_LBA) != 0) {
printf(" lba addressing\n");
wd->sc_capacity =
(wd->sc_params.atap_capacity[1] << 16) |
wd->sc_params.atap_capacity[0];
printf("%s: %dMB, %d cyl, %d head, %d sec, "
"%d bytes/sect x %d sectors\n",
self->dv_xname,
wd->sc_capacity / (1048576 / DEV_BSIZE),
wd->sc_params.atap_cylinders,
wd->sc_params.atap_heads,
wd->sc_params.atap_sectors,
DEV_BSIZE,
wd->sc_capacity);
} else {
printf(" chs addressing\n");
wd->sc_capacity =
wd->sc_params.atap_cylinders *
wd->sc_params.atap_heads *
wd->sc_params.atap_sectors;
printf("%s: %dMB, %d cyl, %d head, %d sec, %d bytes/sect x %d "
"sectors\n", self->dv_xname,
wd->sc_capacity / (1048576 / DEV_BSIZE),
wd->sc_params.atap_cylinders,
wd->sc_params.atap_heads,
wd->sc_params.atap_sectors,
DEV_BSIZE,
wd->sc_capacity);
}
WDCDEBUG_PRINT(("%s: atap_dmatiming_mimi=%d, atap_dmatiming_recom=%d\n",
self->dv_xname, wd->sc_params.atap_dmatiming_mimi,
wd->sc_params.atap_dmatiming_recom), DEBUG_PROBE);
/*
* 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->sc_wdc_bio.lp = wd->sc_dk.dk_label;
wd->sc_sdhook = shutdownhook_establish(wd_shutdown, wd);
if (wd->sc_sdhook == NULL)
printf("%s: WARNING: unable to establish shutdown hook\n",
wd->sc_dev.dv_xname);
#if NRND > 0
rnd_attach_source(&wd->rnd_source, wd->sc_dev.dv_xname,
RND_TYPE_DISK, 0);
#endif
}
int
wdactivate(self, act)
struct device *self;
enum devact act;
{
int rv = 0;
switch (act) {
case DVACT_ACTIVATE:
rv = EOPNOTSUPP;
break;
case DVACT_DEACTIVATE:
/*
* Nothing to do; we key off the device's DVF_ACTIVATE.
*/
break;
}
return (rv);
}
int
wddetach(self, flags)
struct device *self;
int flags;
{
struct wd_softc *sc = (struct wd_softc *)self;
struct buf *bp;
int s, bmaj, cmaj, mn;
/* locate the major number */
for (bmaj = 0; bmaj < nblkdev; bmaj++)
if (bdevsw[bmaj].d_open == wdopen)
break;
for (cmaj = 0; cmaj < nchrdev; cmaj++)
if (cdevsw[cmaj].d_open == wdopen)
break;
s = splbio();
/* Kill off any queued buffers. */
while ((bp = sc->sc_q.b_actf) != NULL) {
sc->sc_q.b_actf = bp->b_actf;
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
bp->b_resid = bp->b_bcount;
biodone(bp);
}
splx(s);
/* Nuke the vnodes for any open instances. */
mn = WDMINOR(self->dv_unit, 0);
vdevgone(bmaj, mn, mn + MAXPARTITIONS - 1, VBLK);
vdevgone(cmaj, mn, mn + MAXPARTITIONS - 1, VCHR);
/* Detach disk. */
disk_detach(&sc->sc_dk);
/* Get rid of the shutdown hook. */
if (sc->sc_sdhook != NULL)
shutdownhook_disestablish(sc->sc_sdhook);
#if NRND > 0
/* Unhook the entropy source. */
rnd_detach_source(&sc->rnd_source);
#endif
return (0);
}
/*
* 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 = wd_cd.cd_devs[WDUNIT(bp->b_dev)];
int s;
WDCDEBUG_PRINT(("wdstrategy (%s)\n", wd->sc_dev.dv_xname),
DEBUG_XFERS);
/* 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);
wdstart(wd);
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(arg)
void *arg;
{
struct wd_softc *wd = arg;
struct buf *dp, *bp=0;
WDCDEBUG_PRINT(("wdstart %s\n", wd->sc_dev.dv_xname),
DEBUG_XFERS);
while (wd->openings > 0) {
/* Is there a buf for us ? */
dp = &wd->sc_q;
if ((bp = dp->b_actf) == NULL) /* yes, an assign */
return;
dp->b_actf = bp->b_actf;
/*
* Make the command. First lock the device
*/
wd->openings--;
wd->retries = 0;
__wdstart(wd, bp);
}
}
void
__wdstart(wd, bp)
struct wd_softc *wd;
struct buf *bp;
{
daddr_t p_offset;
if (WDPART(bp->b_dev) != RAW_PART)
p_offset =
wd->sc_dk.dk_label->d_partitions[WDPART(bp->b_dev)].p_offset;
else
p_offset = 0;
wd->sc_wdc_bio.blkno = bp->b_blkno + p_offset;
wd->sc_wdc_bio.blkno /= (wd->sc_dk.dk_label->d_secsize / DEV_BSIZE);
wd->sc_wdc_bio.blkdone =0;
wd->sc_bp = bp;
/*
* If we're retrying, retry in single-sector mode. This will give us
* the sector number of the problem, and will eventually allow the
* transfer to succeed.
*/
if (wd->sc_multi == 1 || wd->retries >= WDIORETRIES_SINGLE)
wd->sc_wdc_bio.flags = ATA_SINGLE;
else
wd->sc_wdc_bio.flags = 0;
if (wd->sc_flags & WDF_LBA)
wd->sc_wdc_bio.flags |= ATA_LBA;
if (bp->b_flags & B_READ)
wd->sc_wdc_bio.flags |= ATA_READ;
wd->sc_wdc_bio.bcount = bp->b_bcount;
wd->sc_wdc_bio.databuf = bp->b_data;
/* Instrumentation. */
disk_busy(&wd->sc_dk);
switch (wdc_ata_bio(wd->drvp, &wd->sc_wdc_bio)) {
case WDC_TRY_AGAIN:
timeout(wdrestart, wd, hz);
break;
case WDC_QUEUED:
case WDC_COMPLETE:
break;
default:
panic("__wdstart: bad return code from wdc_ata_bio()");
}
}
void
wddone(v)
void *v;
{
struct wd_softc *wd = v;
struct buf *bp = wd->sc_bp;
char buf[256], *errbuf = buf;
WDCDEBUG_PRINT(("wddone %s\n", wd->sc_dev.dv_xname),
DEBUG_XFERS);
bp->b_resid = wd->sc_wdc_bio.bcount;
errbuf[0] = '\0';
switch (wd->sc_wdc_bio.error) {
case ERR_DMA:
errbuf = "DMA error";
goto retry;
case ERR_DF:
errbuf = "device fault";
goto retry;
case TIMEOUT:
errbuf = "device timeout";
goto retry;
case ERROR:
/* Don't care about media change bits */
if (wd->sc_wdc_bio.r_error != 0 &&
(wd->sc_wdc_bio.r_error & ~(WDCE_MC | WDCE_MCR)) == 0)
goto noerror;
ata_perror(wd->drvp, wd->sc_wdc_bio.r_error, errbuf);
retry: /* Just reset and retry. Can we do more ? */
wdc_reset_channel(wd->drvp);
diskerr(bp, "wd", errbuf, LOG_PRINTF,
wd->sc_wdc_bio.blkdone, wd->sc_dk.dk_label);
if (wd->retries++ < WDIORETRIES) {
printf(", retrying\n");
timeout(wdrestart, wd, RECOVERYTIME);
return;
}
printf("\n");
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
break;
case NOERROR:
noerror: if ((wd->sc_wdc_bio.flags & ATA_CORR) || wd->retries > 0)
printf("%s: soft error (corrected)\n",
wd->sc_dev.dv_xname);
break;
case ERR_NODEV:
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
break;
}
disk_unbusy(&wd->sc_dk, (bp->b_bcount - bp->b_resid));
#if NRND > 0
rnd_add_uint32(&wd->rnd_source, bp->b_blkno);
#endif
biodone(bp);
wd->openings++;
wdstart(wd);
}
void
wdrestart(v)
void *v;
{
struct wd_softc *wd = v;
struct buf *bp = wd->sc_bp;
int s;
WDCDEBUG_PRINT(("wdrestart %s\n", wd->sc_dev.dv_xname),
DEBUG_XFERS);
s = splbio();
__wdstart(v, bp);
splx(s);
}
int
wdread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
WDCDEBUG_PRINT(("wdread\n"), DEBUG_XFERS);
return (physio(wdstrategy, NULL, dev, B_READ, minphys, uio));
}
int
wdwrite(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
WDCDEBUG_PRINT(("wdwrite\n"), DEBUG_XFERS);
return (physio(wdstrategy, NULL, dev, B_WRITE, minphys, uio));
}
/*
* 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;
int s;
WDCDEBUG_PRINT(("wdlock\n"), DEBUG_FUNCS);
s = splbio();
while ((wd->sc_flags & WDF_LOCKED) != 0) {
wd->sc_flags |= WDF_WANTED;
if ((error = tsleep(wd, PRIBIO | PCATCH,
"wdlck", 0)) != 0) {
splx(s);
return error;
}
}
wd->sc_flags |= WDF_LOCKED;
splx(s);
return 0;
}
/*
* Unlock and wake up any waiters.
*/
void
wdunlock(wd)
struct wd_softc *wd;
{
WDCDEBUG_PRINT(("wdunlock\n"), DEBUG_FUNCS);
wd->sc_flags &= ~WDF_LOCKED;
if ((wd->sc_flags & WDF_WANTED) != 0) {
wd->sc_flags &= ~WDF_WANTED;
wakeup(wd);
}
}
int
wdopen(dev, flag, fmt, p)
dev_t dev;
int flag, fmt;
struct proc *p;
{
struct wd_softc *wd;
int unit, part;
int error;
WDCDEBUG_PRINT(("wdopen\n"), DEBUG_FUNCS);
unit = WDUNIT(dev);
if (unit >= wd_cd.cd_ndevs)
return ENXIO;
wd = wd_cd.cd_devs[unit];
if (wd == NULL)
return ENXIO;
/*
* If this is the first open of this device, add a reference
* to the adapter.
*/
if (wd->sc_dk.dk_openmask == 0 &&
(error = wdc_ata_addref(wd->drvp)) != 0)
return (error);
if ((error = wdlock(wd)) != 0)
goto bad4;
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. */
wd_get_params(wd, AT_WAIT, &wd->sc_params);
/* 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;
bad:
if (wd->sc_dk.dk_openmask == 0) {
}
bad3:
wdunlock(wd);
bad4:
if (wd->sc_dk.dk_openmask == 0)
wdc_ata_delref(wd->drvp);
return error;
}
int
wdclose(dev, flag, fmt, p)
dev_t dev;
int flag, fmt;
struct proc *p;
{
struct wd_softc *wd = wd_cd.cd_devs[WDUNIT(dev)];
int part = WDPART(dev);
int error;
WDCDEBUG_PRINT(("wdclose\n"), DEBUG_FUNCS);
if ((error = wdlock(wd)) != 0)
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) {
wd_flushcache(wd, AT_WAIT);
/* XXXX Must wait for I/O to complete! */
if (! (wd->sc_flags & WDF_KLABEL))
wd->sc_flags &= ~WDF_LOADED;
wdc_ata_delref(wd->drvp);
}
wdunlock(wd);
return 0;
}
void
wdgetdefaultlabel(wd, lp)
struct wd_softc *wd;
struct disklabel *lp;
{
WDCDEBUG_PRINT(("wdgetdefaultlabel\n"), DEBUG_FUNCS);
memset(lp, 0, sizeof(struct disklabel));
lp->d_secsize = DEV_BSIZE;
lp->d_ntracks = wd->sc_params.atap_heads;
lp->d_nsectors = wd->sc_params.atap_sectors;
lp->d_ncylinders = wd->sc_params.atap_cylinders;
lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
if (strcmp(wd->sc_params.atap_model, "ST506") == 0)
lp->d_type = DTYPE_ST506;
else
lp->d_type = DTYPE_ESDI;
strncpy(lp->d_typename, wd->sc_params.atap_model, 16);
strncpy(lp->d_packname, "fictitious", 16);
lp->d_secperunit = wd->sc_capacity;
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);
}
/*
* 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;
WDCDEBUG_PRINT(("wdgetdisklabel\n"), DEBUG_FUNCS);
memset(wd->sc_dk.dk_cpulabel, 0, sizeof(struct cpu_disklabel));
wdgetdefaultlabel(wd, lp);
wd->sc_badsect[0] = -1;
if (wd->drvp->state > RECAL)
wd->drvp->drive_flags |= DRIVE_RESET;
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->drvp->state > RECAL)
wd->drvp->drive_flags |= DRIVE_RESET;
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->drvp->state > RECAL)
wd->drvp->drive_flags |= DRIVE_RESET;
#ifdef HAS_BAD144_HANDLING
if ((lp->d_flags & D_BADSECT) != 0)
bad144intern(wd);
#endif
}
int
wdioctl(dev, xfer, addr, flag, p)
dev_t dev;
u_long xfer;
caddr_t addr;
int flag;
struct proc *p;
{
struct wd_softc *wd = wd_cd.cd_devs[WDUNIT(dev)];
int error;
WDCDEBUG_PRINT(("wdioctl\n"), DEBUG_FUNCS);
if ((wd->sc_flags & WDF_LOADED) == 0)
return EIO;
switch (xfer) {
#ifdef HAS_BAD144_HANDLING
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;
#endif
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)) != 0)
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->drvp->state > RECAL)
wd->drvp->drive_flags |= DRIVE_RESET;
if (xfer == 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 DIOCKLABEL:
if (*(int *)addr)
wd->sc_flags |= WDF_KLABEL;
else
wd->sc_flags &= ~WDF_KLABEL;
return 0;
case DIOCWLABEL:
if ((flag & FWRITE) == 0)
return EBADF;
if (*(int *)addr)
wd->sc_flags |= WDF_WLABEL;
else
wd->sc_flags &= ~WDF_WLABEL;
return 0;
case DIOCGDEFLABEL:
wdgetdefaultlabel(wd, (struct disklabel *)addr);
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
case ATAIOCCOMMAND:
/*
* Make sure this command is (relatively) safe first
*/
if ((((atareq_t *) addr)->flags & ATACMD_READ) == 0 &&
(flag & FWRITE) == 0)
return (EBADF);
{
struct wd_ioctl *wi;
atareq_t *atareq = (atareq_t *) addr;
int error;
wi = wi_get();
wi->wi_softc = wd;
wi->wi_atareq = *atareq;
if (atareq->datalen && atareq->flags &
(ATACMD_READ | ATACMD_WRITE)) {
wi->wi_iov.iov_base = atareq->databuf;
wi->wi_iov.iov_len = atareq->datalen;
wi->wi_uio.uio_iov = &wi->wi_iov;
wi->wi_uio.uio_iovcnt = 1;
wi->wi_uio.uio_resid = atareq->datalen;
wi->wi_uio.uio_offset = 0;
wi->wi_uio.uio_segflg = UIO_USERSPACE;
wi->wi_uio.uio_rw =
(atareq->flags & ATACMD_READ) ? B_READ : B_WRITE;
wi->wi_uio.uio_procp = p;
error = physio(wdioctlstrategy, &wi->wi_bp, dev,
(atareq->flags & ATACMD_READ) ? B_READ : B_WRITE,
minphys, &wi->wi_uio);
} else {
/* No need to call physio if we don't have any
user data */
wi->wi_bp.b_flags = 0;
wi->wi_bp.b_data = 0;
wi->wi_bp.b_bcount = 0;
wi->wi_bp.b_dev = 0;
wi->wi_bp.b_proc = p;
wdioctlstrategy(&wi->wi_bp);
error = wi->wi_bp.b_error;
}
*atareq = wi->wi_atareq;
wi_free(wi);
return(error);
}
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, unit, omask;
int size;
WDCDEBUG_PRINT(("wdsize\n"), DEBUG_FUNCS);
unit = WDUNIT(dev);
if (unit >= wd_cd.cd_ndevs)
return (-1);
wd = wd_cd.cd_devs[unit];
if (wd == NULL)
return (-1);
part = WDPART(dev);
omask = wd->sc_dk.dk_openmask & (1 << part);
if (omask == 0 && wdopen(dev, 0, S_IFBLK, NULL) != 0)
return (-1);
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 *
(wd->sc_dk.dk_label->d_secsize / DEV_BSIZE);
if (omask == 0 && wdclose(dev, 0, S_IFBLK, NULL) != 0)
return (-1);
return (size);
}
#ifndef __BDEVSW_DUMP_OLD_TYPE
/* #define WD_DUMP_NOT_TRUSTED if you just want to watch */
static int wddoingadump = 0;
static int wddumprecalibrated = 0;
static int wddumpmulti = 1;
/*
* 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 disklabel *lp; /* disk's disklabel */
int unit, part;
int nblks; /* total number of sectors left to write */
int err;
char errbuf[256];
/* Check if recursive dump; if so, punt. */
if (wddoingadump)
return EFAULT;
wddoingadump = 1;
unit = WDUNIT(dev);
if (unit >= wd_cd.cd_ndevs)
return ENXIO;
wd = wd_cd.cd_devs[unit];
if (wd == (struct wd_softc *)0)
return ENXIO;
part = WDPART(dev);
/* Make sure it was initialized. */
if (wd->drvp->state < READY)
return ENXIO;
/* 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) {
wddumpmulti = wd->sc_multi;
wddumprecalibrated = 1;
wd->drvp->state = RECAL;
}
while (nblks > 0) {
again:
wd->sc_wdc_bio.blkno = blkno;
wd->sc_wdc_bio.flags = ATA_POLL;
if (wddumpmulti == 1)
wd->sc_wdc_bio.flags |= ATA_SINGLE;
if (wd->sc_flags & WDF_LBA)
wd->sc_wdc_bio.flags |= ATA_LBA;
wd->sc_wdc_bio.bcount =
min(nblks, wddumpmulti) * lp->d_secsize;
wd->sc_wdc_bio.databuf = va;
#ifndef WD_DUMP_NOT_TRUSTED
switch (wdc_ata_bio(wd->drvp, &wd->sc_wdc_bio)) {
case WDC_TRY_AGAIN:
panic("wddump: try again");
break;
case WDC_QUEUED:
panic("wddump: polled command has been queued");
break;
case WDC_COMPLETE:
break;
}
switch(wd->sc_wdc_bio.error) {
case TIMEOUT:
printf("wddump: device timed out");
err = EIO;
break;
case ERR_DF:
printf("wddump: drive fault");
err = EIO;
break;
case ERR_DMA:
printf("wddump: DMA error");
err = EIO;
break;
case ERROR:
errbuf[0] = '\0';
ata_perror(wd->drvp, wd->sc_wdc_bio.r_error, errbuf);
printf("wddump: %s", errbuf);
err = EIO;
break;
case NOERROR:
err = 0;
break;
default:
panic("wddump: unknown error type");
}
if (err != 0) {
if (wddumpmulti != 1) {
wddumpmulti = 1; /* retry in single-sector */
printf(", retrying\n");
goto again;
}
printf("\n");
return err;
}
#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 -= min(nblks, wddumpmulti);
blkno += min(nblks, wddumpmulti);
va += min(nblks, wddumpmulti) * 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 */
#ifdef HAS_BAD144_HANDLING
/*
* 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;
WDCDEBUG_PRINT(("bad144intern\n"), DEBUG_XFERS);
for (; i < NBT_BAD; 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 < NBT_BAD+1; i++)
wd->sc_badsect[i] = -1;
}
#endif
int
wd_get_params(wd, flags, params)
struct wd_softc *wd;
u_int8_t flags;
struct ataparams *params;
{
switch (ata_get_params(wd->drvp, flags, params)) {
case CMD_AGAIN:
return 1;
case CMD_ERR:
/*
* 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(params->atap_model, "ST506",
sizeof params->atap_model);
params->atap_config = ATA_CFG_FIXED;
params->atap_cylinders = 1024;
params->atap_heads = 8;
params->atap_sectors = 17;
params->atap_multi = 1;
params->atap_capabilities1 = params->atap_capabilities2 = 0;
wd->drvp->ata_vers = -1; /* Mark it as pre-ATA */
return 0;
case CMD_OK:
return 0;
default:
panic("wd_get_params: bad return code from ata_get_params");
/* NOTREACHED */
}
}
void
wd_flushcache(wd, flags)
struct wd_softc *wd;
int flags;
{
struct wdc_command wdc_c;
if (wd->drvp->ata_vers < 4) /* WDCC_FLUSHCACHE is here since ATA-4 */
return;
memset(&wdc_c, 0, sizeof(struct wdc_command));
wdc_c.r_command = WDCC_FLUSHCACHE;
wdc_c.r_st_bmask = WDCS_DRDY;
wdc_c.r_st_pmask = WDCS_DRDY;
wdc_c.flags = flags;
wdc_c.timeout = 30000; /* 30s timeout */
if (wdc_exec_command(wd->drvp, &wdc_c) != WDC_COMPLETE) {
printf("%s: flush cache command didn't complete\n",
wd->sc_dev.dv_xname);
}
if (wdc_c.flags & AT_TIMEOU) {
printf("%s: flush cache command timeout\n",
wd->sc_dev.dv_xname);
}
if (wdc_c.flags & AT_DF) {
printf("%s: flush cache command: drive fault\n",
wd->sc_dev.dv_xname);
}
/*
* Ignore error register, it shouldn't report anything else
* than COMMAND ABORTED, which means the device doesn't support
* flush cache
*/
}
void
wd_shutdown(arg)
void *arg;
{
struct wd_softc *wd = arg;
wd_flushcache(wd, AT_POLL);
}
/*
* Allocate space for a ioctl queue structure. Mostly taken from
* scsipi_ioctl.c
*/
struct wd_ioctl *
wi_get()
{
struct wd_ioctl *wi;
int s;
wi = malloc(sizeof(struct wd_ioctl), M_TEMP, M_WAITOK);
memset(wi, 0, sizeof (struct wd_ioctl));
s = splbio();
LIST_INSERT_HEAD(&wi_head, wi, wi_list);
splx(s);
return (wi);
}
/*
* Free an ioctl structure and remove it from our list
*/
void
wi_free(wi)
struct wd_ioctl *wi;
{
int s;
s = splbio();
LIST_REMOVE(wi, wi_list);
splx(s);
free(wi, M_TEMP);
}
/*
* Find a wd_ioctl structure based on the struct buf.
*/
struct wd_ioctl *
wi_find(bp)
struct buf *bp;
{
struct wd_ioctl *wi;
int s;
s = splbio();
for (wi = wi_head.lh_first; wi != 0; wi = wi->wi_list.le_next)
if (bp == &wi->wi_bp)
break;
splx(s);
return (wi);
}
/*
* Ioctl pseudo strategy routine
*
* This is mostly stolen from scsipi_ioctl.c:scsistrategy(). What
* happens here is:
*
* - wdioctl() queues a wd_ioctl structure.
*
* - wdioctl() calls physio/wdioctlstrategy based on whether or not
* user space I/O is required. If physio() is called, physio() eventually
* calls wdioctlstrategy().
*
* - In either case, wdioctlstrategy() calls wdc_exec_command()
* to perform the actual command
*
* The reason for the use of the pseudo strategy routine is because
* when doing I/O to/from user space, physio _really_ wants to be in
* the loop. We could put the entire buffer into the ioctl request
* structure, but that won't scale if we want to do things like download
* microcode.
*/
void
wdioctlstrategy(bp)
struct buf *bp;
{
struct wd_ioctl *wi;
struct wdc_command wdc_c;
int error = 0;
wi = wi_find(bp);
if (wi == NULL) {
printf("user_strat: No ioctl\n");
error = EINVAL;
goto bad;
}
memset(&wdc_c, 0, sizeof(wdc_c));
/*
* Abort if physio broke up the transfer
*/
if (bp->b_bcount != wi->wi_atareq.datalen) {
printf("physio split wd ioctl request... cannot proceed\n");
error = EIO;
goto bad;
}
/*
* Abort if we didn't get a buffer size that was a multiple of
* our sector size (or was larger than NBBY)
*/
if ((bp->b_bcount % wi->wi_softc->sc_dk.dk_label->d_secsize) != 0 ||
(bp->b_bcount / wi->wi_softc->sc_dk.dk_label->d_secsize) >=
(1 << NBBY)) {
error = EINVAL;
goto bad;
}
/*
* Make sure a timeout was supplied in the ioctl request
*/
if (wi->wi_atareq.timeout == 0) {
error = EINVAL;
goto bad;
}
if (wi->wi_atareq.flags & ATACMD_READ)
wdc_c.flags |= AT_READ;
else if (wi->wi_atareq.flags & ATACMD_WRITE)
wdc_c.flags |= AT_WRITE;
if (wi->wi_atareq.flags & ATACMD_READREG)
wdc_c.flags |= AT_READREG;
wdc_c.flags |= AT_WAIT;
wdc_c.timeout = wi->wi_atareq.timeout;
wdc_c.r_command = wi->wi_atareq.command;
wdc_c.r_head = wi->wi_atareq.head & 0x0f;
wdc_c.r_cyl = wi->wi_atareq.cylinder;
wdc_c.r_sector = wi->wi_atareq.sec_num;
wdc_c.r_count = wi->wi_atareq.sec_count;
wdc_c.r_precomp = wi->wi_atareq.features;
wdc_c.r_st_bmask = WDCS_DRDY;
wdc_c.r_st_pmask = WDCS_DRDY;
wdc_c.data = wi->wi_bp.b_data;
wdc_c.bcount = wi->wi_bp.b_bcount;
if (wdc_exec_command(wi->wi_softc->drvp, &wdc_c) != WDC_COMPLETE) {
wi->wi_atareq.retsts = ATACMD_ERROR;
goto bad;
}
if (wdc_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) {
if (wdc_c.flags & AT_ERROR) {
wi->wi_atareq.retsts = ATACMD_ERROR;
wi->wi_atareq.error = wdc_c.r_error;
} else if (wdc_c.flags & AT_DF)
wi->wi_atareq.retsts = ATACMD_DF;
else
wi->wi_atareq.retsts = ATACMD_TIMEOUT;
} else {
wi->wi_atareq.retsts = ATACMD_OK;
if (wi->wi_atareq.flags & ATACMD_READREG) {
wi->wi_atareq.head = wdc_c.r_head ;
wi->wi_atareq.cylinder = wdc_c.r_cyl;
wi->wi_atareq.sec_num = wdc_c.r_sector;
wi->wi_atareq.sec_count = wdc_c.r_count;
wi->wi_atareq.features = wdc_c.r_precomp;
wi->wi_atareq.error = wdc_c.r_error;
}
}
bp->b_error = 0;
biodone(bp);
return;
bad:
bp->b_flags |= B_ERROR;
bp->b_error = error;
biodone(bp);
}
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