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/* $NetBSD: wd.c,v 1.449 2019/04/07 13:00:00 bouyer Exp $ */
/*
* Copyright (c) 1998, 2001 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.
*
* 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, 2003, 2004 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.
*
* 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: wd.c,v 1.449 2019/04/07 13:00:00 bouyer Exp $");
#include "opt_ata.h"
#include "opt_wd.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/bufq.h>
#include <sys/uio.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/syslog.h>
#include <sys/proc.h>
#include <sys/reboot.h>
#include <sys/vnode.h>
#include <sys/rndsource.h>
#include <sys/intr.h>
#include <sys/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"
#include <prop/proplib.h>
#define WDIORETRIES_SINGLE 4 /* number of retries for 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_FUNCS 0x08
#define DEBUG_PROBE 0x10
#define DEBUG_DETACH 0x20
#define DEBUG_XFERS 0x40
#ifdef ATADEBUG
#ifndef ATADEBUG_WD_MASK
#define ATADEBUG_WD_MASK 0x0
#endif
int wdcdebug_wd_mask = ATADEBUG_WD_MASK;
#define ATADEBUG_PRINT(args, level) \
if (wdcdebug_wd_mask & (level)) \
printf args
#else
#define ATADEBUG_PRINT(args, level)
#endif
static int wdprobe(device_t, cfdata_t, void *);
static void wdattach(device_t, device_t, void *);
static int wddetach(device_t, int);
static void wdperror(const struct wd_softc *, struct ata_xfer *);
static void wdminphys(struct buf *);
static int wd_firstopen(device_t, dev_t, int, int);
static int wd_lastclose(device_t);
static bool wd_suspend(device_t, const pmf_qual_t *);
static int wd_standby(struct wd_softc *, int);
CFATTACH_DECL3_NEW(wd, sizeof(struct wd_softc),
wdprobe, wdattach, wddetach, NULL, NULL, NULL, DVF_DETACH_SHUTDOWN);
extern struct cfdriver wd_cd;
static dev_type_open(wdopen);
static dev_type_close(wdclose);
static dev_type_read(wdread);
static dev_type_write(wdwrite);
static dev_type_ioctl(wdioctl);
static dev_type_strategy(wdstrategy);
static dev_type_dump(wddump);
static dev_type_size(wdsize);
static dev_type_discard(wddiscard);
const struct bdevsw wd_bdevsw = {
.d_open = wdopen,
.d_close = wdclose,
.d_strategy = wdstrategy,
.d_ioctl = wdioctl,
.d_dump = wddump,
.d_psize = wdsize,
.d_discard = wddiscard,
.d_flag = D_DISK
};
const struct cdevsw wd_cdevsw = {
.d_open = wdopen,
.d_close = wdclose,
.d_read = wdread,
.d_write = wdwrite,
.d_ioctl = wdioctl,
.d_stop = nostop,
.d_tty = notty,
.d_poll = nopoll,
.d_mmap = nommap,
.d_kqfilter = nokqfilter,
.d_discard = wddiscard,
.d_flag = D_DISK
};
/* #define WD_DUMP_NOT_TRUSTED if you just want to watch */
static int wddoingadump = 0;
static int wddumprecalibrated = 0;
/*
* 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;
};
static struct wd_ioctl *wi_find(struct buf *);
static void wi_free(struct wd_ioctl *);
static struct wd_ioctl *wi_get(struct wd_softc *);
static void wdioctlstrategy(struct buf *);
static void wdrestart(void *);
static void wdstart1(struct wd_softc *, struct buf *, struct ata_xfer *);
static int wd_diskstart(device_t, struct buf *);
static int wd_dumpblocks(device_t, void *, daddr_t, int);
static void wd_iosize(device_t, int *);
static int wd_discard(device_t, off_t, off_t);
static void wdbioretry(void *);
static void wdbiorequeue(void *);
static void wddone(device_t, struct ata_xfer *);
static int wd_get_params(struct wd_softc *, uint8_t, struct ataparams *);
static void wd_set_geometry(struct wd_softc *);
static int wd_flushcache(struct wd_softc *, int, bool);
static int wd_trim(struct wd_softc *, daddr_t, long);
static bool wd_shutdown(device_t, int);
static int wd_getcache(struct wd_softc *, int *);
static int wd_setcache(struct wd_softc *, int);
static void wd_sysctl_attach(struct wd_softc *);
static void wd_sysctl_detach(struct wd_softc *);
struct dkdriver wddkdriver = {
.d_open = wdopen,
.d_close = wdclose,
.d_strategy = wdstrategy,
.d_minphys = wdminphys,
.d_diskstart = wd_diskstart,
.d_dumpblocks = wd_dumpblocks,
.d_iosize = wd_iosize,
.d_firstopen = wd_firstopen,
.d_lastclose = wd_lastclose,
.d_discard = wd_discard
};
#ifdef HAS_BAD144_HANDLING
static void bad144intern(struct wd_softc *);
#endif
#define WD_QUIRK_SPLIT_MOD15_WRITE 0x0001 /* must split certain writes */
#define WD_QUIRK_FMT "\20\1SPLIT_MOD15_WRITE\2FORCE_LBA48"
/*
* Quirk table for IDE drives. Put more-specific matches first, since
* a simple globing routine is used for matching.
*/
static const struct wd_quirk {
const char *wdq_match; /* inquiry pattern to match */
int wdq_quirks; /* drive quirks */
} wd_quirk_table[] = {
/*
* Some Seagate S-ATA drives have a PHY which can get confused
* with the way data is packetized by some S-ATA controllers.
*
* The work-around is to split in two any write transfer whose
* sector count % 15 == 1 (assuming 512 byte sectors).
*
* XXX This is an incomplete list. There are at least a couple
* XXX more model numbers. If you have trouble with such transfers
* XXX (8K is the most common) on Seagate S-ATA drives, please
* XXX notify thorpej@NetBSD.org.
*
* The ST360015AS has not yet been confirmed to have this
* issue, however, it is the only other drive in the
* Seagate Barracuda Serial ATA V family.
*
*/
{ "ST3120023AS",
WD_QUIRK_SPLIT_MOD15_WRITE },
{ "ST380023AS",
WD_QUIRK_SPLIT_MOD15_WRITE },
{ "ST360015AS",
WD_QUIRK_SPLIT_MOD15_WRITE },
{ NULL,
0 }
};
static const struct wd_quirk *
wd_lookup_quirks(const char *name)
{
const struct wd_quirk *wdq;
const char *estr;
for (wdq = wd_quirk_table; wdq->wdq_match != NULL; wdq++) {
/*
* We only want exact matches (which include matches
* against globbing characters).
*/
if (pmatch(name, wdq->wdq_match, &estr) == 2)
return (wdq);
}
return (NULL);
}
static int
wdprobe(device_t parent, cfdata_t match, void *aux)
{
struct ata_device *adev = aux;
if (adev == NULL)
return 0;
if (adev->adev_bustype->bustype_type != SCSIPI_BUSTYPE_ATA)
return 0;
if (match->cf_loc[ATA_HLCF_DRIVE] != ATA_HLCF_DRIVE_DEFAULT &&
match->cf_loc[ATA_HLCF_DRIVE] != adev->adev_drv_data->drive)
return 0;
return 1;
}
static void
wdattach(device_t parent, device_t self, void *aux)
{
struct wd_softc *wd = device_private(self);
struct dk_softc *dksc = &wd->sc_dksc;
struct ata_device *adev= aux;
int i, blank;
char tbuf[41],pbuf[9], c, *p, *q;
const struct wd_quirk *wdq;
int dtype = DKTYPE_UNKNOWN;
dksc->sc_dev = self;
ATADEBUG_PRINT(("wdattach\n"), DEBUG_FUNCS | DEBUG_PROBE);
mutex_init(&wd->sc_lock, MUTEX_DEFAULT, IPL_BIO);
#ifdef WD_SOFTBADSECT
SLIST_INIT(&wd->sc_bslist);
#endif
wd->atabus = adev->adev_bustype;
wd->inflight = 0;
wd->drvp = adev->adev_drv_data;
wd->drvp->drv_openings = 1;
wd->drvp->drv_done = wddone;
wd->drvp->drv_softc = dksc->sc_dev; /* done in atabusconfig_thread()
but too late */
SLIST_INIT(&wd->sc_retry_list);
SLIST_INIT(&wd->sc_requeue_list);
callout_init(&wd->sc_retry_callout, 0); /* XXX MPSAFE */
callout_init(&wd->sc_requeue_callout, 0); /* XXX MPSAFE */
callout_init(&wd->sc_restart_diskqueue, 0); /* XXX MPSAFE */
aprint_naive("\n");
aprint_normal("\n");
/* read our drive info */
if (wd_get_params(wd, AT_WAIT, &wd->sc_params) != 0) {
aprint_error_dev(self, "IDENTIFY failed\n");
goto out;
}
for (blank = 0, p = wd->sc_params.atap_model, q = tbuf, 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';
wd->sc_typename = kmem_asprintf("%s", tbuf);
aprint_normal_dev(self, "<%s>\n", wd->sc_typename);
wdq = wd_lookup_quirks(tbuf);
if (wdq != NULL)
wd->sc_quirks = wdq->wdq_quirks;
if (wd->sc_quirks != 0) {
char sbuf[sizeof(WD_QUIRK_FMT) + 64];
snprintb(sbuf, sizeof(sbuf), WD_QUIRK_FMT, wd->sc_quirks);
aprint_normal_dev(self, "quirks %s\n", sbuf);
if (wd->sc_quirks & WD_QUIRK_SPLIT_MOD15_WRITE) {
aprint_error_dev(self, "drive corrupts write transfers with certain controllers, consider replacing\n");
}
}
if ((wd->sc_params.atap_multi & 0xff) > 1) {
wd->drvp->multi = wd->sc_params.atap_multi & 0xff;
} else {
wd->drvp->multi = 1;
}
aprint_verbose_dev(self, "drive supports %d-sector PIO transfers,",
wd->drvp->multi);
/* 48-bit LBA addressing */
if ((wd->sc_params.atap_cmd2_en & ATA_CMD2_LBA48) != 0)
wd->sc_flags |= WDF_LBA48;
/* 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_LBA48) != 0) {
aprint_verbose(" LBA48 addressing\n");
wd->sc_capacity =
((uint64_t) wd->sc_params.atap_max_lba[3] << 48) |
((uint64_t) wd->sc_params.atap_max_lba[2] << 32) |
((uint64_t) wd->sc_params.atap_max_lba[1] << 16) |
((uint64_t) wd->sc_params.atap_max_lba[0] << 0);
wd->sc_capacity28 =
(wd->sc_params.atap_capacity[1] << 16) |
wd->sc_params.atap_capacity[0];
} else if ((wd->sc_flags & WDF_LBA) != 0) {
aprint_verbose(" LBA addressing\n");
wd->sc_capacity28 = wd->sc_capacity =
(wd->sc_params.atap_capacity[1] << 16) |
wd->sc_params.atap_capacity[0];
} else {
aprint_verbose(" chs addressing\n");
wd->sc_capacity28 = wd->sc_capacity =
wd->sc_params.atap_cylinders *
wd->sc_params.atap_heads *
wd->sc_params.atap_sectors;
}
if ((wd->sc_params.atap_secsz & ATA_SECSZ_VALID_MASK) == ATA_SECSZ_VALID
&& ((wd->sc_params.atap_secsz & ATA_SECSZ_LLS) != 0)) {
wd->sc_blksize = 2ULL *
((uint32_t)((wd->sc_params.atap_lls_secsz[1] << 16) |
wd->sc_params.atap_lls_secsz[0]));
} else {
wd->sc_blksize = 512;
}
wd->sc_capacity512 = (wd->sc_capacity * wd->sc_blksize) / DEV_BSIZE;
format_bytes(pbuf, sizeof(pbuf), wd->sc_capacity * wd->sc_blksize);
aprint_normal_dev(self, "%s, %d cyl, %d head, %d sec, "
"%d bytes/sect x %llu sectors\n",
pbuf,
(wd->sc_flags & WDF_LBA) ? (int)(wd->sc_capacity /
(wd->sc_params.atap_heads * wd->sc_params.atap_sectors)) :
wd->sc_params.atap_cylinders,
wd->sc_params.atap_heads, wd->sc_params.atap_sectors,
wd->sc_blksize, (unsigned long long)wd->sc_capacity);
ATADEBUG_PRINT(("%s: atap_dmatiming_mimi=%d, atap_dmatiming_recom=%d\n",
device_xname(self), wd->sc_params.atap_dmatiming_mimi,
wd->sc_params.atap_dmatiming_recom), DEBUG_PROBE);
if (wd->sc_blksize <= 0 || !powerof2(wd->sc_blksize) ||
wd->sc_blksize < DEV_BSIZE || wd->sc_blksize > MAXPHYS) {
aprint_normal_dev(self, "WARNING: block size %u "
"might not actually work\n", wd->sc_blksize);
}
if (strcmp(wd->sc_params.atap_model, "ST506") == 0)
dtype = DKTYPE_ST506;
else
dtype = DKTYPE_ESDI;
out:
/*
* Initialize and attach the disk structure.
*/
dk_init(dksc, self, dtype);
disk_init(&dksc->sc_dkdev, dksc->sc_xname, &wddkdriver);
/* Attach dk and disk subsystems */
dk_attach(dksc);
disk_attach(&dksc->sc_dkdev);
wd_set_geometry(wd);
bufq_alloc(&dksc->sc_bufq, BUFQ_DISK_DEFAULT_STRAT, BUFQ_SORT_RAWBLOCK);
/* reference to label structure, used by ata code */
wd->drvp->lp = dksc->sc_dkdev.dk_label;
/* Discover wedges on this disk. */
dkwedge_discover(&dksc->sc_dkdev);
if (!pmf_device_register1(self, wd_suspend, NULL, wd_shutdown))
aprint_error_dev(self, "couldn't establish power handler\n");
wd_sysctl_attach(wd);
}
static bool
wd_suspend(device_t dv, const pmf_qual_t *qual)
{
struct wd_softc *sc = device_private(dv);
/* the adapter needs to be enabled */
if (sc->atabus->ata_addref(sc->drvp))
return true; /* no need to complain */
wd_flushcache(sc, AT_WAIT, false);
wd_standby(sc, AT_WAIT);
sc->atabus->ata_delref(sc->drvp);
return true;
}
static int
wddetach(device_t self, int flags)
{
struct wd_softc *wd = device_private(self);
struct dk_softc *dksc = &wd->sc_dksc;
int bmaj, cmaj, i, mn, rc;
if ((rc = disk_begindetach(&dksc->sc_dkdev, wd_lastclose, self, flags)) != 0)
return rc;
/* locate the major number */
bmaj = bdevsw_lookup_major(&wd_bdevsw);
cmaj = cdevsw_lookup_major(&wd_cdevsw);
/* Nuke the vnodes for any open instances. */
for (i = 0; i < MAXPARTITIONS; i++) {
mn = WDMINOR(device_unit(self), i);
vdevgone(bmaj, mn, mn, VBLK);
vdevgone(cmaj, mn, mn, VCHR);
}
dk_drain(dksc);
/* Kill off any pending commands. */
mutex_enter(&wd->sc_lock);
wd->atabus->ata_killpending(wd->drvp);
callout_halt(&wd->sc_retry_callout, &wd->sc_lock);
callout_destroy(&wd->sc_retry_callout);
callout_halt(&wd->sc_requeue_callout, &wd->sc_lock);
callout_destroy(&wd->sc_requeue_callout);
callout_halt(&wd->sc_restart_diskqueue, &wd->sc_lock);
callout_destroy(&wd->sc_restart_diskqueue);
mutex_exit(&wd->sc_lock);
bufq_free(dksc->sc_bufq);
/* Delete all of our wedges. */
dkwedge_delall(&dksc->sc_dkdev);
if (flags & DETACH_POWEROFF)
wd_standby(wd, AT_POLL);
/* Detach from the disk list. */
disk_detach(&dksc->sc_dkdev);
disk_destroy(&dksc->sc_dkdev);
dk_detach(dksc);
#ifdef WD_SOFTBADSECT
/* Clean out the bad sector list */
while (!SLIST_EMPTY(&wd->sc_bslist)) {
struct disk_badsectors *dbs = SLIST_FIRST(&wd->sc_bslist);
SLIST_REMOVE_HEAD(&wd->sc_bslist, dbs_next);
kmem_free(dbs, sizeof(*dbs));
}
wd->sc_bscount = 0;
#endif
if (wd->sc_typename != NULL) {
kmem_free(wd->sc_typename, strlen(wd->sc_typename) + 1);
wd->sc_typename = NULL;
}
pmf_device_deregister(self);
wd_sysctl_detach(wd);
mutex_destroy(&wd->sc_lock);
wd->drvp->drive_type = ATA_DRIVET_NONE; /* no drive any more here */
wd->drvp->drive_flags = 0;
return (0);
}
/*
* Read/write routine for a buffer. Validates the arguments and schedules the
* transfer. Does not wait for the transfer to complete.
*/
static void
wdstrategy(struct buf *bp)
{
struct wd_softc *wd =
device_lookup_private(&wd_cd, WDUNIT(bp->b_dev));
struct dk_softc *dksc = &wd->sc_dksc;
ATADEBUG_PRINT(("wdstrategy (%s)\n", dksc->sc_xname),
DEBUG_XFERS);
/* If device invalidated (e.g. media change, door open,
* device detachment), then error.
*/
if ((wd->sc_flags & WDF_LOADED) == 0 ||
!device_is_enabled(dksc->sc_dev))
goto err;
#ifdef WD_SOFTBADSECT
/*
* If the transfer about to be attempted contains only a block that
* is known to be bad then return an error for the transfer without
* even attempting to start a transfer up under the premis that we
* will just end up doing more retries for a transfer that will end
* up failing again.
*/
if (__predict_false(!SLIST_EMPTY(&wd->sc_bslist))) {
struct disklabel *lp = dksc->sc_dkdev.dk_label;
struct disk_badsectors *dbs;
daddr_t blkno, maxblk;
/* convert the block number to absolute */
if (lp->d_secsize >= DEV_BSIZE)
blkno = bp->b_blkno / (lp->d_secsize / DEV_BSIZE);
else
blkno = bp->b_blkno * (DEV_BSIZE / lp->d_secsize);
if (WDPART(bp->b_dev) != RAW_PART)
blkno += lp->d_partitions[WDPART(bp->b_dev)].p_offset;
maxblk = blkno + (bp->b_bcount / wd->sc_blksize) - 1;
mutex_enter(&wd->sc_lock);
SLIST_FOREACH(dbs, &wd->sc_bslist, dbs_next)
if ((dbs->dbs_min <= bp->b_rawblkno &&
bp->b_rawblkno <= dbs->dbs_max) ||
(dbs->dbs_min <= maxblk && maxblk <= dbs->dbs_max)){
mutex_exit(&wd->sc_lock);
goto err;
}
mutex_exit(&wd->sc_lock);
}
#endif
dk_strategy(dksc, bp);
return;
err:
bp->b_error = EIO;
bp->b_resid = bp->b_bcount;
biodone(bp);
}
static void
wdstart1(struct wd_softc *wd, struct buf *bp, struct ata_xfer *xfer)
{
struct dk_softc *dksc = &wd->sc_dksc;
KASSERT(bp == xfer->c_bio.bp || xfer->c_bio.bp == NULL);
KASSERT((xfer->c_flags & (C_WAITACT|C_FREE)) == 0);
/* Reset state, so that retries don't use stale info */
if (__predict_false(xfer->c_retries > 0)) {
xfer->c_flags = 0;
memset(&xfer->c_bio, 0, sizeof(xfer->c_bio));
}
xfer->c_bio.blkno = bp->b_rawblkno;
xfer->c_bio.bcount = bp->b_bcount;
xfer->c_bio.databuf = bp->b_data;
xfer->c_bio.blkdone = 0;
xfer->c_bio.bp = bp;
#ifdef WD_CHAOS_MONKEY
/*
* Override blkno to be over device capacity to trigger error,
* but only if it's read, to avoid trashing disk contents should
* the command be clipped, or otherwise misinterpreted, by the
* driver or controller.
*/
if (BUF_ISREAD(bp) && xfer->c_retries == 0 && wd->drv_chaos_freq > 0 &&
(++wd->drv_chaos_cnt % wd->drv_chaos_freq) == 0) {
device_printf(dksc->sc_dev, "%s: chaos xfer %"PRIxPTR"\n",
__func__, (intptr_t)xfer & PAGE_MASK);
xfer->c_bio.blkno = 7777777 + wd->sc_capacity;
xfer->c_flags |= C_CHAOS;
}
#endif
/*
* 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 FUA is requested, we can't actually
* do this, as ATA_SINGLE is usually executed as PIO transfer by drivers
* which support it, and that isn't compatible with NCQ/FUA.
*/
if (xfer->c_retries >= WDIORETRIES_SINGLE &&
(bp->b_flags & B_MEDIA_FUA) == 0)
xfer->c_bio.flags = ATA_SINGLE;
else
xfer->c_bio.flags = 0;
/*
* request LBA48 transfers when supported by the controller
* and needed by transfer offset or size.
*/
if (wd->sc_flags & WDF_LBA48 &&
(((xfer->c_bio.blkno +
xfer->c_bio.bcount / dksc->sc_dkdev.dk_geom.dg_secsize) >
wd->sc_capacity28) ||
((xfer->c_bio.bcount / dksc->sc_dkdev.dk_geom.dg_secsize) > 128)))
xfer->c_bio.flags |= ATA_LBA48;
/*
* If NCQ was negotiated, always use it for the first several attempts.
* Since device cancels all outstanding requests on error, downgrade
* to non-NCQ on retry, so that the retried transfer would not cause
* cascade failure for the other transfers if it fails again.
* If FUA was requested, we can't downgrade, as that would violate
* the semantics - FUA would not be honored. In that case, continue
* retrying with NCQ.
*/
if (WD_USE_NCQ(wd) && (xfer->c_retries < WDIORETRIES_SINGLE ||
(bp->b_flags & B_MEDIA_FUA) != 0)) {
xfer->c_bio.flags |= ATA_LBA48;
xfer->c_flags |= C_NCQ;
if (WD_USE_NCQ_PRIO(wd) &&
BIO_GETPRIO(bp) == BPRIO_TIMECRITICAL)
xfer->c_bio.flags |= ATA_PRIO_HIGH;
}
if (wd->sc_flags & WDF_LBA)
xfer->c_bio.flags |= ATA_LBA;
if (bp->b_flags & B_READ) {
xfer->c_bio.flags |= ATA_READ;
} else {
/* it's a write */
wd->sc_flags |= WDF_DIRTY;
}
if (bp->b_flags & B_MEDIA_FUA) {
/* If not using NCQ, the command WRITE DMA FUA EXT is LBA48 */
KASSERT((wd->sc_flags & WDF_LBA48) != 0);
if ((xfer->c_flags & C_NCQ) == 0)
xfer->c_bio.flags |= ATA_LBA48;
xfer->c_bio.flags |= ATA_FUA;
}
wd->inflight++;
switch (wd->atabus->ata_bio(wd->drvp, xfer)) {
case ATACMD_TRY_AGAIN:
panic("wdstart1: try again");
break;
case ATACMD_QUEUED:
case ATACMD_COMPLETE:
break;
default:
panic("wdstart1: bad return code from ata_bio()");
}
}
static int
wd_diskstart(device_t dev, struct buf *bp)
{
struct wd_softc *wd = device_private(dev);
#ifdef ATADEBUG
struct dk_softc *dksc = &wd->sc_dksc;
#endif
struct ata_xfer *xfer;
struct ata_channel *chp;
unsigned openings;
mutex_enter(&wd->sc_lock);
chp = wd->drvp->chnl_softc;
ata_channel_lock(chp);
openings = ata_queue_openings(chp);
ata_channel_unlock(chp);
openings = uimin(openings, wd->drvp->drv_openings);
if (wd->inflight >= openings) {
mutex_exit(&wd->sc_lock);
return EAGAIN;
}
xfer = ata_get_xfer(chp, false);
if (xfer == NULL) {
ATADEBUG_PRINT(("wd_diskstart %s no xfer\n",
dksc->sc_xname), DEBUG_XFERS);
/*
* No available memory, retry later. This happens very rarely
* and only under memory pressure, so wait relatively long
* before retry.
*/
if (!callout_pending(&wd->sc_restart_diskqueue)) {
callout_reset(&wd->sc_restart_diskqueue, hz / 2,
wdrestart, dev);
}
mutex_exit(&wd->sc_lock);
return EAGAIN;
}
wdstart1(wd, bp, xfer);
mutex_exit(&wd->sc_lock);
return 0;
}
/*
* Queue a drive for I/O.
*/
static void
wdrestart(void *x)
{
device_t self = x;
struct wd_softc *wd = device_private(self);
struct dk_softc *dksc = &wd->sc_dksc;
ATADEBUG_PRINT(("wdstart %s\n", dksc->sc_xname),
DEBUG_XFERS);
if (!device_is_active(dksc->sc_dev))
return;
dk_start(dksc, NULL);
}
static void
wddone(device_t self, struct ata_xfer *xfer)
{
struct wd_softc *wd = device_private(self);
struct dk_softc *dksc = &wd->sc_dksc;
const char *errmsg;
int do_perror = 0;
struct buf *bp;
ATADEBUG_PRINT(("wddone %s\n", dksc->sc_xname),
DEBUG_XFERS);
if (__predict_false(wddoingadump)) {
/* just drop it to the floor */
ata_free_xfer(wd->drvp->chnl_softc, xfer);
return;
}
bp = xfer->c_bio.bp;
KASSERT(bp != NULL);
bp->b_resid = xfer->c_bio.bcount;
switch (xfer->c_bio.error) {
case ERR_DMA:
errmsg = "DMA error";
goto retry;
case ERR_DF:
errmsg = "device fault";
goto retry;
case TIMEOUT:
errmsg = "device timeout";
goto retry;
case REQUEUE:
errmsg = "requeue";
goto retry2;
case ERR_RESET:
errmsg = "channel reset";
goto retry2;
case ERROR:
/* Don't care about media change bits */
if (xfer->c_bio.r_error != 0 &&
(xfer->c_bio.r_error & ~(WDCE_MC | WDCE_MCR)) == 0)
goto noerror;
errmsg = "error";
do_perror = 1;
retry: /* Just reset and retry. Can we do more ? */
if ((xfer->c_flags & C_RECOVERED) == 0) {
int wflags = (xfer->c_flags & C_POLL) ? AT_POLL : 0;
ata_channel_lock(wd->drvp->chnl_softc);
ata_thread_run(wd->drvp->chnl_softc, wflags,
ATACH_TH_DRIVE_RESET, wd->drvp->drive);
ata_channel_unlock(wd->drvp->chnl_softc);
}
retry2:
mutex_enter(&wd->sc_lock);
diskerr(bp, "wd", errmsg, LOG_PRINTF,
xfer->c_bio.blkdone, dksc->sc_dkdev.dk_label);
if (xfer->c_retries < WDIORETRIES)
printf(", xfer %"PRIxPTR", retry %d",
(intptr_t)xfer & PAGE_MASK,
xfer->c_retries);
printf("\n");
if (do_perror)
wdperror(wd, xfer);
if (xfer->c_retries < WDIORETRIES) {
xfer->c_retries++;
/* Rerun ASAP if just requeued */
if (xfer->c_bio.error == REQUEUE) {
SLIST_INSERT_HEAD(&wd->sc_requeue_list, xfer,
c_retrychain);
callout_reset(&wd->sc_requeue_callout,
1, wdbiorequeue, wd);
} else {
SLIST_INSERT_HEAD(&wd->sc_retry_list, xfer,
c_retrychain);
callout_reset(&wd->sc_retry_callout,
RECOVERYTIME, wdbioretry, wd);
}
mutex_exit(&wd->sc_lock);
return;
}
mutex_exit(&wd->sc_lock);
#ifdef WD_SOFTBADSECT
/*
* Not all errors indicate a failed block but those that do,
* put the block on the bad-block list for the device. Only
* do this for reads because the drive should do it for writes,
* itself, according to Manuel.
*/
if ((bp->b_flags & B_READ) &&
((wd->drvp->ata_vers >= 4 && xfer->c_bio.r_error & 64) ||
(wd->drvp->ata_vers < 4 && xfer->c_bio.r_error & 192))) {
struct disk_badsectors *dbs;
dbs = kmem_zalloc(sizeof *dbs, KM_NOSLEEP);
if (dbs == NULL) {
aprint_error_dev(dksc->sc_dev,
"failed to add bad block to list\n");
goto out;
}
dbs->dbs_min = bp->b_rawblkno;
dbs->dbs_max = dbs->dbs_min +
(bp->b_bcount /wd->sc_blksize) - 1;
microtime(&dbs->dbs_failedat);
mutex_enter(&wd->sc_lock);
SLIST_INSERT_HEAD(&wd->sc_bslist, dbs, dbs_next);
wd->sc_bscount++;
mutex_exit(&wd->sc_lock);
}
out:
#endif
bp->b_error = EIO;
break;
case NOERROR:
#ifdef WD_CHAOS_MONKEY
/*
* For example Parallels AHCI emulation doesn't actually
* return error for the invalid I/O, so just re-run
* the request and do not panic.
*/
if (__predict_false(xfer->c_flags & C_CHAOS)) {
xfer->c_bio.error = REQUEUE;
errmsg = "chaos noerror";
goto retry2;
}
#endif
noerror: if ((xfer->c_bio.flags & ATA_CORR) || xfer->c_retries > 0)
device_printf(dksc->sc_dev,
"soft error (corrected) xfer %"PRIxPTR"\n",
(intptr_t)xfer & PAGE_MASK);
break;
case ERR_NODEV:
bp->b_error = EIO;
break;
}
if (__predict_false(bp->b_error != 0) && bp->b_resid == 0) {
/*
* the disk or controller sometimes report a complete
* xfer, when there has been an error. This is wrong,
* assume nothing got transfered in this case
*/
bp->b_resid = bp->b_bcount;
}
ata_free_xfer(wd->drvp->chnl_softc, xfer);
wd->inflight--;
dk_done(dksc, bp);
dk_start(dksc, NULL);
}
static void
wdbioretry(void *v)
{
struct wd_softc *wd = v;
struct ata_xfer *xfer;
ATADEBUG_PRINT(("%s %s\n", __func__, wd->sc_dksc.sc_xname),
DEBUG_XFERS);
mutex_enter(&wd->sc_lock);
while ((xfer = SLIST_FIRST(&wd->sc_retry_list))) {
SLIST_REMOVE_HEAD(&wd->sc_retry_list, c_retrychain);
wdstart1(wd, xfer->c_bio.bp, xfer);
}
mutex_exit(&wd->sc_lock);
}
static void
wdbiorequeue(void *v)
{
struct wd_softc *wd = v;
struct ata_xfer *xfer;
ATADEBUG_PRINT(("%s %s\n", __func__, wd->sc_dksc.sc_xname),
DEBUG_XFERS);
mutex_enter(&wd->sc_lock);
while ((xfer = SLIST_FIRST(&wd->sc_requeue_list))) {
SLIST_REMOVE_HEAD(&wd->sc_requeue_list, c_retrychain);
wdstart1(wd, xfer->c_bio.bp, xfer);
}
mutex_exit(&wd->sc_lock);
}
static void
wdminphys(struct buf *bp)
{
const struct wd_softc * const wd =
device_lookup_private(&wd_cd, WDUNIT(bp->b_dev));
int maxsectors;
/*
* The limit is actually 65536 for LBA48 and 256 for non-LBA48,
* but that requires to set the count for the ATA command
* to 0, which is somewhat error prone, so better stay safe.
*/
if (wd->sc_flags & WDF_LBA48)
maxsectors = 65535;
else
maxsectors = 128;
if (bp->b_bcount > (wd->sc_blksize * maxsectors))
bp->b_bcount = (wd->sc_blksize * maxsectors);
minphys(bp);
}
static void
wd_iosize(device_t dev, int *count)
{
struct buf B;
int bmaj;
bmaj = bdevsw_lookup_major(&wd_bdevsw);
B.b_dev = MAKEWDDEV(bmaj,device_unit(dev),RAW_PART);
B.b_bcount = *count;
wdminphys(&B);
*count = B.b_bcount;
}
static int
wdread(dev_t dev, struct uio *uio, int flags)
{
ATADEBUG_PRINT(("wdread\n"), DEBUG_XFERS);
return (physio(wdstrategy, NULL, dev, B_READ, wdminphys, uio));
}
static int
wdwrite(dev_t dev, struct uio *uio, int flags)
{
ATADEBUG_PRINT(("wdwrite\n"), DEBUG_XFERS);
return (physio(wdstrategy, NULL, dev, B_WRITE, wdminphys, uio));
}
static int
wdopen(dev_t dev, int flag, int fmt, struct lwp *l)
{
struct wd_softc *wd;
struct dk_softc *dksc;
int unit, part, error;
ATADEBUG_PRINT(("wdopen\n"), DEBUG_FUNCS);
unit = WDUNIT(dev);
wd = device_lookup_private(&wd_cd, unit);
if (wd == NULL)
return (ENXIO);
dksc = &wd->sc_dksc;
if (! device_is_active(dksc->sc_dev))
return (ENODEV);
part = WDPART(dev);
if (wd->sc_capacity == 0)
return (ENODEV);
/*
* If any partition is open, but the disk has been invalidated,
* disallow further opens.
*/
if ((wd->sc_flags & (WDF_OPEN | WDF_LOADED)) == WDF_OPEN) {
if (part != RAW_PART || fmt != S_IFCHR)
return EIO;
}
error = dk_open(dksc, dev, flag, fmt, l);
return error;
}
/*
* Serialized by caller
*/
static int
wd_firstopen(device_t self, dev_t dev, int flag, int fmt)
{
struct wd_softc *wd = device_private(self);
struct dk_softc *dksc = &wd->sc_dksc;
int error;
error = wd->atabus->ata_addref(wd->drvp);
if (error)
return error;
if ((wd->sc_flags & WDF_LOADED) == 0) {
int param_error;
/* Load the physical device parameters. */
param_error = wd_get_params(wd, AT_WAIT, &wd->sc_params);
if (param_error != 0) {
aprint_error_dev(dksc->sc_dev, "IDENTIFY failed\n");
error = EIO;
goto bad;
}
wd_set_geometry(wd);
wd->sc_flags |= WDF_LOADED;
}
wd->sc_flags |= WDF_OPEN;
return 0;
bad:
wd->atabus->ata_delref(wd->drvp);
return error;
}
/*
* Caller must hold wd->sc_dk.dk_openlock.
*/
static int
wd_lastclose(device_t self)
{
struct wd_softc *wd = device_private(self);
KASSERTMSG(bufq_peek(wd->sc_dksc.sc_bufq) == NULL, "bufq not empty");
if (wd->sc_flags & WDF_DIRTY)
wd_flushcache(wd, AT_WAIT, false);
wd->atabus->ata_delref(wd->drvp);
wd->sc_flags &= ~WDF_OPEN;
return 0;
}
static int
wdclose(dev_t dev, int flag, int fmt, struct lwp *l)
{
struct wd_softc *wd;
struct dk_softc *dksc;
int unit;
unit = WDUNIT(dev);
wd = device_lookup_private(&wd_cd, unit);
dksc = &wd->sc_dksc;
return dk_close(dksc, dev, flag, fmt, l);
}
void
wdperror(const struct wd_softc *wd, struct ata_xfer *xfer)
{
static const char *const errstr0_3[] = {"address mark not found",
"track 0 not found", "aborted command", "media change requested",
"id not found", "media changed", "uncorrectable data error",
"bad block detected"};
static const char *const errstr4_5[] = {
"obsolete (address mark not found)",
"no media/write protected", "aborted command",
"media change requested", "id not found", "media changed",
"uncorrectable data error", "interface CRC error"};
const char *const *errstr;
int i;
const char *sep = "";
const struct dk_softc *dksc = &wd->sc_dksc;
const char *devname = dksc->sc_xname;
struct ata_drive_datas *drvp = wd->drvp;
int errno = xfer->c_bio.r_error;
if (drvp->ata_vers >= 4)
errstr = errstr4_5;
else
errstr = errstr0_3;
printf("%s: (", devname);
if (errno == 0)
printf("error not notified");
for (i = 0; i < 8; i++) {
if (errno & (1 << i)) {
printf("%s%s", sep, errstr[i]);
sep = ", ";
}
}
printf(")\n");
}
int
wdioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l)
{
struct wd_softc *wd =
device_lookup_private(&wd_cd, WDUNIT(dev));
struct dk_softc *dksc = &wd->sc_dksc;
ATADEBUG_PRINT(("wdioctl\n"), DEBUG_FUNCS);
if ((wd->sc_flags & WDF_LOADED) == 0)
return EIO;
switch (cmd) {
#ifdef HAS_BAD144_HANDLING
case DIOCSBAD:
if ((flag & FWRITE) == 0)
return EBADF;
dksc->sc_dkdev.dk_cpulabel->bad = *(struct dkbad *)addr;
dksc->sc_dkdev.dk_label->d_flags |= D_BADSECT;
bad144intern(wd);
return 0;
#endif
#ifdef WD_SOFTBADSECT
case DIOCBSLIST :
{
uint32_t count, missing, skip;
struct disk_badsecinfo dbsi;
struct disk_badsectors *dbs;
size_t available;
uint8_t *laddr;
dbsi = *(struct disk_badsecinfo *)addr;
missing = wd->sc_bscount;
count = 0;
available = dbsi.dbsi_bufsize;
skip = dbsi.dbsi_skip;
laddr = (uint8_t *)dbsi.dbsi_buffer;
/*
* We start this loop with the expectation that all of the
* entries will be missed and decrement this counter each
* time we either skip over one (already copied out) or
* we actually copy it back to user space. The structs
* holding the bad sector information are copied directly
* back to user space whilst the summary is returned via
* the struct passed in via the ioctl.
*/
mutex_enter(&wd->sc_lock);
SLIST_FOREACH(dbs, &wd->sc_bslist, dbs_next) {
if (skip > 0) {
missing--;
skip--;
continue;
}
if (available < sizeof(*dbs))
break;
available -= sizeof(*dbs);
copyout(dbs, laddr, sizeof(*dbs));
laddr += sizeof(*dbs);
missing--;
count++;
}
mutex_exit(&wd->sc_lock);
dbsi.dbsi_left = missing;
dbsi.dbsi_copied = count;
*(struct disk_badsecinfo *)addr = dbsi;
return 0;
}
case DIOCBSFLUSH :
/* Clean out the bad sector list */
mutex_enter(&wd->sc_lock);
while (!SLIST_EMPTY(&wd->sc_bslist)) {
struct disk_badsectors *dbs =
SLIST_FIRST(&wd->sc_bslist);
SLIST_REMOVE_HEAD(&wd->sc_bslist, dbs_next);
kmem_free(dbs, sizeof(*dbs));
}
mutex_exit(&wd->sc_lock);
wd->sc_bscount = 0;
return 0;
#endif
#ifdef notyet
case DIOCWFORMAT:
if ((flag & FWRITE) == 0)
return EBADF;
{
register struct format_op *fop;
struct iovec aiov;
struct uio auio;
int error1;
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_offset =
fop->df_startblk * wd->sc_dk.dk_label->d_secsize;
auio.uio_vmspace = l->l_proc->p_vmspace;
error1 = physio(wdformat, NULL, dev, B_WRITE, wdminphys,
&auio);
fop->df_count -= auio.uio_resid;
fop->df_reg[0] = wdc->sc_status;
fop->df_reg[1] = wdc->sc_error;
return error1;
}
#endif
case DIOCGCACHE:
return wd_getcache(wd, (int *)addr);
case DIOCSCACHE:
return wd_setcache(wd, *(int *)addr);
case DIOCCACHESYNC:
return wd_flushcache(wd, AT_WAIT, true);
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 error1;
wi = wi_get(wd);
wi->wi_atareq = *atareq;
if (atareq->datalen && atareq->flags &
(ATACMD_READ | ATACMD_WRITE)) {
void *tbuf;
if (atareq->datalen < DEV_BSIZE
&& atareq->command == WDCC_IDENTIFY) {
tbuf = kmem_zalloc(DEV_BSIZE, KM_SLEEP);
wi->wi_iov.iov_base = tbuf;
wi->wi_iov.iov_len = DEV_BSIZE;
UIO_SETUP_SYSSPACE(&wi->wi_uio);
} else {
tbuf = NULL;
wi->wi_iov.iov_base = atareq->databuf;
wi->wi_iov.iov_len = atareq->datalen;
wi->wi_uio.uio_vmspace = l->l_proc->p_vmspace;
}
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_rw =
(atareq->flags & ATACMD_READ) ? B_READ : B_WRITE;
error1 = physio(wdioctlstrategy, &wi->wi_bp, dev,
(atareq->flags & ATACMD_READ) ? B_READ : B_WRITE,
wdminphys, &wi->wi_uio);
if (tbuf != NULL && error1 == 0) {
error1 = copyout(tbuf, atareq->databuf,
atareq->datalen);
kmem_free(tbuf, DEV_BSIZE);
}
} 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 = dev;
wi->wi_bp.b_proc = l->l_proc;
wdioctlstrategy(&wi->wi_bp);
error1 = wi->wi_bp.b_error;
}
*atareq = wi->wi_atareq;
wi_free(wi);
return(error1);
}
default:
return dk_ioctl(dksc, dev, cmd, addr, flag, l);
}
#ifdef DIAGNOSTIC
panic("wdioctl: impossible");
#endif
}
static int
wd_discard(device_t dev, off_t pos, off_t len)
{
struct wd_softc *wd = device_private(dev);
daddr_t bno;
long size, done;
long maxatonce, amount;
int result;
if (!(wd->sc_params.atap_ata_major & WDC_VER_ATA7)
|| !(wd->sc_params.support_dsm & ATA_SUPPORT_DSM_TRIM)) {
/* not supported; ignore request */
ATADEBUG_PRINT(("wddiscard (unsupported)\n"), DEBUG_FUNCS);
return 0;
}
maxatonce = 0xffff; /*wd->sc_params.max_dsm_blocks*/
ATADEBUG_PRINT(("wddiscard\n"), DEBUG_FUNCS);
if ((wd->sc_flags & WDF_LOADED) == 0)
return EIO;
/* round the start up and the end down */
bno = (pos + wd->sc_blksize - 1) / wd->sc_blksize;
size = ((pos + len) / wd->sc_blksize) - bno;
done = 0;
while (done < size) {
amount = size - done;
if (amount > maxatonce) {
amount = maxatonce;
}
result = wd_trim(wd, bno + done, amount);
if (result) {
return result;
}
done += amount;
}
return 0;
}
static int
wddiscard(dev_t dev, off_t pos, off_t len)
{
struct wd_softc *wd;
struct dk_softc *dksc;
int unit;
unit = WDUNIT(dev);
wd = device_lookup_private(&wd_cd, unit);
dksc = &wd->sc_dksc;
return dk_discard(dksc, dev, pos, len);
}
#ifdef B_FORMAT
int
wdformat(struct buf *bp)
{
bp->b_flags |= B_FORMAT;
return wdstrategy(bp);
}
#endif
int
wdsize(dev_t dev)
{
struct wd_softc *wd;
struct dk_softc *dksc;
int unit;
ATADEBUG_PRINT(("wdsize\n"), DEBUG_FUNCS);
unit = WDUNIT(dev);
wd = device_lookup_private(&wd_cd, unit);
if (wd == NULL)
return (-1);
dksc = &wd->sc_dksc;
if (!device_is_active(dksc->sc_dev))
return (-1);
return dk_size(dksc, dev);
}
/*
* Dump core after a system crash.
*/
static int
wddump(dev_t dev, daddr_t blkno, void *va, size_t size)
{
struct wd_softc *wd;
struct dk_softc *dksc;
int unit;
/* Check if recursive dump; if so, punt. */
if (wddoingadump)
return EFAULT;
wddoingadump = 1;
unit = WDUNIT(dev);
wd = device_lookup_private(&wd_cd, unit);
if (wd == NULL)
return (ENXIO);
dksc = &wd->sc_dksc;
return dk_dump(dksc, dev, blkno, va, size);
}
static int
wd_dumpblocks(device_t dev, void *va, daddr_t blkno, int nblk)
{
struct wd_softc *wd = device_private(dev);
struct dk_softc *dksc = &wd->sc_dksc;
struct disk_geom *dg = &dksc->sc_dkdev.dk_geom;
struct ata_xfer *xfer = &wd->dump_xfer;
int err;
/* Recalibrate, if first dump transfer. */
if (wddumprecalibrated == 0) {
wddumprecalibrated = 1;
ata_channel_lock(wd->drvp->chnl_softc);
/* This will directly execute the reset due to AT_POLL */
ata_thread_run(wd->drvp->chnl_softc, AT_POLL,
ATACH_TH_DRIVE_RESET, wd->drvp->drive);
wd->drvp->state = RESET;
ata_channel_unlock(wd->drvp->chnl_softc);
}
memset(xfer, 0, sizeof(*xfer));
xfer->c_flags |= C_PRIVATE_ALLOC | C_SKIP_QUEUE;
xfer->c_bio.blkno = blkno;
xfer->c_bio.flags = ATA_POLL;
if (wd->sc_flags & WDF_LBA48 &&
(xfer->c_bio.blkno + nblk) > wd->sc_capacity28)
xfer->c_bio.flags |= ATA_LBA48;
if (wd->sc_flags & WDF_LBA)
xfer->c_bio.flags |= ATA_LBA;
xfer->c_bio.bcount = nblk * dg->dg_secsize;
xfer->c_bio.databuf = va;
#ifndef WD_DUMP_NOT_TRUSTED
switch (err = wd->atabus->ata_bio(wd->drvp, xfer)) {
case ATACMD_TRY_AGAIN:
panic("wddump: try again");
break;
case ATACMD_QUEUED:
panic("wddump: polled command has been queued");
break;
case ATACMD_COMPLETE:
break;
default:
panic("wddump: unknown atacmd code %d", err);
}
switch(err = xfer->c_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:
printf("wddump: ");
wdperror(wd, xfer);
err = EIO;
break;
case NOERROR:
err = 0;
break;
default:
panic("wddump: unknown error type %x", err);
}
if (err != 0) {
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
wddoingadump = 0;
return 0;
}
#ifdef HAS_BAD144_HANDLING
/*
* Internalize the bad sector table.
*/
void
bad144intern(struct wd_softc *wd)
{
struct dk_softc *dksc = &wd->sc_dksc;
struct dkbad *bt = &dksc->sc_dkdev.dk_cpulabel->bad;
struct disklabel *lp = dksc->sc_dkdev.dk_label;
int i = 0;
ATADEBUG_PRINT(("bad144intern\n"), DEBUG_XFERS);
for (; i < NBT_BAD; i++) {
if (bt->bt_bad[i].bt_cyl == 0xffff)
break;
wd->drvp->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->drvp->badsect[i] = -1;
}
#endif
static void
wd_set_geometry(struct wd_softc *wd)
{
struct dk_softc *dksc = &wd->sc_dksc;
struct disk_geom *dg = &dksc->sc_dkdev.dk_geom;
memset(dg, 0, sizeof(*dg));
dg->dg_secperunit = wd->sc_capacity;
dg->dg_secsize = wd->sc_blksize;
dg->dg_nsectors = wd->sc_params.atap_sectors;
dg->dg_ntracks = wd->sc_params.atap_heads;
if ((wd->sc_flags & WDF_LBA) == 0)
dg->dg_ncylinders = wd->sc_params.atap_cylinders;
disk_set_info(dksc->sc_dev, &dksc->sc_dkdev, wd->sc_typename);
}
int
wd_get_params(struct wd_softc *wd, uint8_t flags, struct ataparams *params)
{
int retry = 0;
again:
switch (wd->atabus->ata_get_params(wd->drvp, flags, params)) {
case CMD_AGAIN:
return 1;
case CMD_ERR:
if (retry == 0) {
retry++;
(*wd->atabus->ata_reset_drive)(wd->drvp, flags, NULL);
goto again;
}
if (wd->drvp->drive_type != ATA_DRIVET_OLD)
return 1;
/*
* 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 */
/* FALLTHROUGH */
case CMD_OK:
return 0;
default:
panic("wd_get_params: bad return code from ata_get_params");
/* NOTREACHED */
}
}
int
wd_getcache(struct wd_softc *wd, int *bitsp)
{
struct ataparams params;
if (wd_get_params(wd, AT_WAIT, &params) != 0)
return EIO;
if (params.atap_cmd_set1 == 0x0000 ||
params.atap_cmd_set1 == 0xffff ||
(params.atap_cmd_set1 & WDC_CMD1_CACHE) == 0) {
*bitsp = 0;
return 0;
}
*bitsp = DKCACHE_WCHANGE | DKCACHE_READ;
if (params.atap_cmd1_en & WDC_CMD1_CACHE)
*bitsp |= DKCACHE_WRITE;
if (WD_USE_NCQ(wd) || (wd->drvp->drive_flags & ATA_DRIVE_WFUA))
*bitsp |= DKCACHE_FUA;
return 0;
}
const char at_errbits[] = "\20\10ERROR\11TIMEOU\12DF";
int
wd_setcache(struct wd_softc *wd, int bits)
{
struct dk_softc *dksc = &wd->sc_dksc;
struct ataparams params;
struct ata_xfer *xfer;
int error;
if (wd_get_params(wd, AT_WAIT, &params) != 0)
return EIO;
if (params.atap_cmd_set1 == 0x0000 ||
params.atap_cmd_set1 == 0xffff ||
(params.atap_cmd_set1 & WDC_CMD1_CACHE) == 0)
return EOPNOTSUPP;
if ((bits & DKCACHE_READ) == 0 ||
(bits & DKCACHE_SAVE) != 0)
return EOPNOTSUPP;
xfer = ata_get_xfer(wd->drvp->chnl_softc, true);
xfer->c_ata_c.r_command = SET_FEATURES;
xfer->c_ata_c.r_st_bmask = 0;
xfer->c_ata_c.r_st_pmask = 0;
xfer->c_ata_c.timeout = 30000; /* 30s timeout */
xfer->c_ata_c.flags = AT_WAIT;
if (bits & DKCACHE_WRITE)
xfer->c_ata_c.r_features = WDSF_WRITE_CACHE_EN;
else
xfer->c_ata_c.r_features = WDSF_WRITE_CACHE_DS;
if (wd->atabus->ata_exec_command(wd->drvp, xfer) != ATACMD_COMPLETE) {
aprint_error_dev(dksc->sc_dev,
"wd_setcache command not complete\n");
error = EIO;
goto out;
}
if (xfer->c_ata_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) {
char sbuf[sizeof(at_errbits) + 64];
snprintb(sbuf, sizeof(sbuf), at_errbits, xfer->c_ata_c.flags);
aprint_error_dev(dksc->sc_dev, "wd_setcache: status=%s\n", sbuf);
error = EIO;
goto out;
}
error = 0;
out:
ata_free_xfer(wd->drvp->chnl_softc, xfer);
return error;
}
static int
wd_standby(struct wd_softc *wd, int flags)
{
struct dk_softc *dksc = &wd->sc_dksc;
struct ata_xfer *xfer;
int error;
aprint_debug_dev(dksc->sc_dev, "standby immediate\n");
xfer = ata_get_xfer(wd->drvp->chnl_softc, true);
xfer->c_ata_c.r_command = WDCC_STANDBY_IMMED;
xfer->c_ata_c.r_st_bmask = WDCS_DRDY;
xfer->c_ata_c.r_st_pmask = WDCS_DRDY;
xfer->c_ata_c.flags = flags;
xfer->c_ata_c.timeout = 30000; /* 30s timeout */
if (wd->atabus->ata_exec_command(wd->drvp, xfer) != ATACMD_COMPLETE) {
aprint_error_dev(dksc->sc_dev,
"standby immediate command didn't complete\n");
error = EIO;
goto out;
}
if (xfer->c_ata_c.flags & AT_ERROR) {
if (xfer->c_ata_c.r_error == WDCE_ABRT) {
/* command not supported */
aprint_debug_dev(dksc->sc_dev,
"standby immediate not supported\n");
error = ENODEV;
goto out;
}
}
if (xfer->c_ata_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) {
char sbuf[sizeof(at_errbits) + 64];
snprintb(sbuf, sizeof(sbuf), at_errbits, xfer->c_ata_c.flags);
aprint_error_dev(dksc->sc_dev, "wd_standby: status=%s\n", sbuf);
error = EIO;
goto out;
}
error = 0;
out:
ata_free_xfer(wd->drvp->chnl_softc, xfer);
return error;
}
int
wd_flushcache(struct wd_softc *wd, int flags, bool start_self)
{
struct dk_softc *dksc = &wd->sc_dksc;
struct ata_xfer *xfer;
int error;
/*
* WDCC_FLUSHCACHE is here since ATA-4, but some drives report
* only ATA-2 and still support it.
*/
if (wd->drvp->ata_vers < 4 &&
((wd->sc_params.atap_cmd_set2 & WDC_CMD2_FC) == 0 ||
wd->sc_params.atap_cmd_set2 == 0xffff))
return ENODEV;
xfer = ata_get_xfer(wd->drvp->chnl_softc, true);
if ((wd->sc_params.atap_cmd2_en & ATA_CMD2_LBA48) != 0 &&
(wd->sc_params.atap_cmd2_en & ATA_CMD2_FCE) != 0) {
xfer->c_ata_c.r_command = WDCC_FLUSHCACHE_EXT;
flags |= AT_LBA48;
} else
xfer->c_ata_c.r_command = WDCC_FLUSHCACHE;
xfer->c_ata_c.r_st_bmask = WDCS_DRDY;
xfer->c_ata_c.r_st_pmask = WDCS_DRDY;
xfer->c_ata_c.flags = flags | AT_READREG;
xfer->c_ata_c.timeout = 300000; /* 5m timeout */
if (wd->atabus->ata_exec_command(wd->drvp, xfer) != ATACMD_COMPLETE) {
aprint_error_dev(dksc->sc_dev,
"flush cache command didn't complete\n");
error = EIO;
goto out_xfer;
}
if (xfer->c_ata_c.flags & AT_ERROR) {
if (xfer->c_ata_c.r_error == WDCE_ABRT) {
/* command not supported */
error = ENODEV;
goto out_xfer;
}
}
if (xfer->c_ata_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) {
char sbuf[sizeof(at_errbits) + 64];
snprintb(sbuf, sizeof(sbuf), at_errbits, xfer->c_ata_c.flags);
aprint_error_dev(dksc->sc_dev, "wd_flushcache: status=%s\n",
sbuf);
error = EIO;
goto out_xfer;
}
wd->sc_flags &= ~WDF_DIRTY;
error = 0;
out_xfer:
ata_free_xfer(wd->drvp->chnl_softc, xfer);
return error;
}
/*
* Execute TRIM command, assumes sleep context.
*/
static int
wd_trim(struct wd_softc *wd, daddr_t bno, long size)
{
struct dk_softc *dksc = &wd->sc_dksc;
struct ata_xfer *xfer;
int error;
unsigned char *req;
xfer = ata_get_xfer(wd->drvp->chnl_softc, true);
req = kmem_zalloc(512, KM_SLEEP);
req[0] = bno & 0xff;
req[1] = (bno >> 8) & 0xff;
req[2] = (bno >> 16) & 0xff;
req[3] = (bno >> 24) & 0xff;
req[4] = (bno >> 32) & 0xff;
req[5] = (bno >> 40) & 0xff;
req[6] = size & 0xff;
req[7] = (size >> 8) & 0xff;
/*
* XXX We could possibly use NCQ TRIM, which supports executing
* this command concurrently. It would need some investigation, some
* early or not so early disk firmware caused data loss with NCQ TRIM.
* atastart() et.al would need to be adjusted to allow and support
* running several non-I/O ATA commands in parallel.
*/
xfer->c_ata_c.r_command = ATA_DATA_SET_MANAGEMENT;
xfer->c_ata_c.r_count = 1;
xfer->c_ata_c.r_features = ATA_SUPPORT_DSM_TRIM;
xfer->c_ata_c.r_st_bmask = WDCS_DRDY;
xfer->c_ata_c.r_st_pmask = WDCS_DRDY;
xfer->c_ata_c.timeout = 30000; /* 30s timeout */
xfer->c_ata_c.data = req;
xfer->c_ata_c.bcount = 512;
xfer->c_ata_c.flags |= AT_WRITE | AT_WAIT;
if (wd->atabus->ata_exec_command(wd->drvp, xfer) != ATACMD_COMPLETE) {
aprint_error_dev(dksc->sc_dev,
"trim command didn't complete\n");
kmem_free(req, 512);
error = EIO;
goto out;
}
kmem_free(req, 512);
if (xfer->c_ata_c.flags & AT_ERROR) {
if (xfer->c_ata_c.r_error == WDCE_ABRT) {
/* command not supported */
error = ENODEV;
goto out;
}
}
if (xfer->c_ata_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) {
char sbuf[sizeof(at_errbits) + 64];
snprintb(sbuf, sizeof(sbuf), at_errbits, xfer->c_ata_c.flags);
aprint_error_dev(dksc->sc_dev, "wd_trim: status=%s\n",
sbuf);
error = EIO;
goto out;
}
error = 0;
out:
ata_free_xfer(wd->drvp->chnl_softc, xfer);
return error;
}
bool
wd_shutdown(device_t dev, int how)
{
struct wd_softc *wd = device_private(dev);
/* the adapter needs to be enabled */
if (wd->atabus->ata_addref(wd->drvp))
return true; /* no need to complain */
wd_flushcache(wd, AT_POLL, false);
if ((how & RB_POWERDOWN) == RB_POWERDOWN)
wd_standby(wd, AT_POLL);
return true;
}
/*
* Allocate space for a ioctl queue structure. Mostly taken from
* scsipi_ioctl.c
*/
struct wd_ioctl *
wi_get(struct wd_softc *wd)
{
struct wd_ioctl *wi;
wi = kmem_zalloc(sizeof(struct wd_ioctl), KM_SLEEP);
wi->wi_softc = wd;
buf_init(&wi->wi_bp);
return (wi);
}
/*
* Free an ioctl structure and remove it from our list
*/
void
wi_free(struct wd_ioctl *wi)
{
buf_destroy(&wi->wi_bp);
kmem_free(wi, sizeof(*wi));
}
/*
* Find a wd_ioctl structure based on the struct buf.
*/
struct wd_ioctl *
wi_find(struct buf *bp)
{
return container_of(bp, struct wd_ioctl, wi_bp);
}
static uint
wi_sector_size(const struct wd_ioctl * const wi)
{
switch (wi->wi_atareq.command) {
case WDCC_READ:
case WDCC_WRITE:
case WDCC_READMULTI:
case WDCC_WRITEMULTI:
case WDCC_READDMA:
case WDCC_WRITEDMA:
case WDCC_READ_EXT:
case WDCC_WRITE_EXT:
case WDCC_READMULTI_EXT:
case WDCC_WRITEMULTI_EXT:
case WDCC_READDMA_EXT:
case WDCC_WRITEDMA_EXT:
case WDCC_READ_FPDMA_QUEUED:
case WDCC_WRITE_FPDMA_QUEUED:
return wi->wi_softc->sc_blksize;
default:
return 512;
}
}
/*
* 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 wd->atabus->ata_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(struct buf *bp)
{
struct wd_ioctl *wi;
struct ata_xfer *xfer;
int error = 0;
wi = wi_find(bp);
if (wi == NULL) {
printf("wdioctlstrategy: "
"No matching ioctl request found in queue\n");
error = EINVAL;
goto out2;
}
xfer = ata_get_xfer(wi->wi_softc->drvp->chnl_softc, true);
/*
* 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 out;
}
/*
* Abort if we didn't get a buffer size that was a multiple of
* our sector size (or overflows CHS/LBA28 sector count)
*/
if ((bp->b_bcount % wi_sector_size(wi)) != 0 ||
(bp->b_bcount / wi_sector_size(wi)) >=
(1 << NBBY)) {
error = EINVAL;
goto out;
}
/*
* Make sure a timeout was supplied in the ioctl request
*/
if (wi->wi_atareq.timeout == 0) {
error = EINVAL;
goto out;
}
if (wi->wi_atareq.flags & ATACMD_READ)
xfer->c_ata_c.flags |= AT_READ;
else if (wi->wi_atareq.flags & ATACMD_WRITE)
xfer->c_ata_c.flags |= AT_WRITE;
if (wi->wi_atareq.flags & ATACMD_READREG)
xfer->c_ata_c.flags |= AT_READREG;
if ((wi->wi_atareq.flags & ATACMD_LBA) != 0)
xfer->c_ata_c.flags |= AT_LBA;
xfer->c_ata_c.flags |= AT_WAIT;
xfer->c_ata_c.timeout = wi->wi_atareq.timeout;
xfer->c_ata_c.r_command = wi->wi_atareq.command;
xfer->c_ata_c.r_lba = ((wi->wi_atareq.head & 0x0f) << 24) |
(wi->wi_atareq.cylinder << 8) |
wi->wi_atareq.sec_num;
xfer->c_ata_c.r_count = wi->wi_atareq.sec_count;
xfer->c_ata_c.r_features = wi->wi_atareq.features;
xfer->c_ata_c.r_st_bmask = WDCS_DRDY;
xfer->c_ata_c.r_st_pmask = WDCS_DRDY;
xfer->c_ata_c.data = wi->wi_bp.b_data;
xfer->c_ata_c.bcount = wi->wi_bp.b_bcount;
if (wi->wi_softc->atabus->ata_exec_command(wi->wi_softc->drvp, xfer)
!= ATACMD_COMPLETE) {
wi->wi_atareq.retsts = ATACMD_ERROR;
error = EIO;
goto out;
}
if (xfer->c_ata_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) {
if (xfer->c_ata_c.flags & AT_ERROR) {
wi->wi_atareq.retsts = ATACMD_ERROR;
wi->wi_atareq.error = xfer->c_ata_c.r_error;
} else if (xfer->c_ata_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.command = xfer->c_ata_c.r_status;
wi->wi_atareq.features = xfer->c_ata_c.r_error;
wi->wi_atareq.sec_count = xfer->c_ata_c.r_count;
wi->wi_atareq.sec_num = xfer->c_ata_c.r_lba & 0xff;
wi->wi_atareq.head = (xfer->c_ata_c.r_device & 0xf0) |
((xfer->c_ata_c.r_lba >> 24) & 0x0f);
wi->wi_atareq.cylinder =
(xfer->c_ata_c.r_lba >> 8) & 0xffff;
wi->wi_atareq.error = xfer->c_ata_c.r_error;
}
}
out:
ata_free_xfer(wi->wi_softc->drvp->chnl_softc, xfer);
out2:
bp->b_error = error;
if (error)
bp->b_resid = bp->b_bcount;
biodone(bp);
}
static void
wd_sysctl_attach(struct wd_softc *wd)
{
struct dk_softc *dksc = &wd->sc_dksc;
const struct sysctlnode *node;
int error;
/* sysctl set-up */
if (sysctl_createv(&wd->nodelog, 0, NULL, &node,
0, CTLTYPE_NODE, dksc->sc_xname,
SYSCTL_DESCR("wd driver settings"),
NULL, 0, NULL, 0,
CTL_HW, CTL_CREATE, CTL_EOL) != 0) {
aprint_error_dev(dksc->sc_dev,
"could not create %s.%s sysctl node\n",
"hw", dksc->sc_xname);
return;
}
wd->drv_ncq = true;
if ((error = sysctl_createv(&wd->nodelog, 0, NULL, NULL,
CTLFLAG_READWRITE, CTLTYPE_BOOL, "use_ncq",
SYSCTL_DESCR("use NCQ if supported"),
NULL, 0, &wd->drv_ncq, 0,
CTL_HW, node->sysctl_num, CTL_CREATE, CTL_EOL))
!= 0) {
aprint_error_dev(dksc->sc_dev,
"could not create %s.%s.use_ncq sysctl - error %d\n",
"hw", dksc->sc_xname, error);
return;
}
wd->drv_ncq_prio = false;
if ((error = sysctl_createv(&wd->nodelog, 0, NULL, NULL,
CTLFLAG_READWRITE, CTLTYPE_BOOL, "use_ncq_prio",
SYSCTL_DESCR("use NCQ PRIORITY if supported"),
NULL, 0, &wd->drv_ncq_prio, 0,
CTL_HW, node->sysctl_num, CTL_CREATE, CTL_EOL))
!= 0) {
aprint_error_dev(dksc->sc_dev,
"could not create %s.%s.use_ncq_prio sysctl - error %d\n",
"hw", dksc->sc_xname, error);
return;
}
#ifdef WD_CHAOS_MONKEY
wd->drv_chaos_freq = 0;
if ((error = sysctl_createv(&wd->nodelog, 0, NULL, NULL,
CTLFLAG_READWRITE, CTLTYPE_INT, "chaos_freq",
SYSCTL_DESCR("simulated bio read error rate"),
NULL, 0, &wd->drv_chaos_freq, 0,
CTL_HW, node->sysctl_num, CTL_CREATE, CTL_EOL))
!= 0) {
aprint_error_dev(dksc->sc_dev,
"could not create %s.%s.chaos_freq sysctl - error %d\n",
"hw", dksc->sc_xname, error);
return;
}
wd->drv_chaos_cnt = 0;
if ((error = sysctl_createv(&wd->nodelog, 0, NULL, NULL,
CTLFLAG_READONLY, CTLTYPE_INT, "chaos_cnt",
SYSCTL_DESCR("number of processed bio reads"),
NULL, 0, &wd->drv_chaos_cnt, 0,
CTL_HW, node->sysctl_num, CTL_CREATE, CTL_EOL))
!= 0) {
aprint_error_dev(dksc->sc_dev,
"could not create %s.%s.chaos_cnt sysctl - error %d\n",
"hw", dksc->sc_xname, error);
return;
}
#endif
}
static void
wd_sysctl_detach(struct wd_softc *wd)
{
sysctl_teardown(&wd->nodelog);
}
#ifdef ATADEBUG
int wddebug(void);
int
wddebug(void)
{
struct wd_softc *wd;
struct dk_softc *dksc;
int unit;
for (unit = 0; unit <= 3; unit++) {
wd = device_lookup_private(&wd_cd, unit);
if (wd == NULL)
continue;
dksc = &wd->sc_dksc;
printf("%s fl %x bufq %p:\n",
dksc->sc_xname, wd->sc_flags, bufq_peek(dksc->sc_bufq));
atachannel_debug(wd->drvp->chnl_softc);
}
return 0;
}
#endif /* ATADEBUG */
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