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scsiconf.c revision 1.237
      1 /*	$NetBSD: scsiconf.c,v 1.237 2006/08/29 20:40:23 bjh21 Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998, 1999, 2004 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace
      9  * Simulation Facility, NASA Ames Research Center.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *        This product includes software developed by the NetBSD
     22  *        Foundation, Inc. and its contributors.
     23  * 4. Neither the name of The NetBSD Foundation nor the names of its
     24  *    contributors may be used to endorse or promote products derived
     25  *    from this software without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     37  * POSSIBILITY OF SUCH DAMAGE.
     38  */
     39 
     40 /*
     41  * Originally written by Julian Elischer (julian (at) tfs.com)
     42  * for TRW Financial Systems for use under the MACH(2.5) operating system.
     43  *
     44  * TRW Financial Systems, in accordance with their agreement with Carnegie
     45  * Mellon University, makes this software available to CMU to distribute
     46  * or use in any manner that they see fit as long as this message is kept with
     47  * the software. For this reason TFS also grants any other persons or
     48  * organisations permission to use or modify this software.
     49  *
     50  * TFS supplies this software to be publicly redistributed
     51  * on the understanding that TFS is not responsible for the correct
     52  * functioning of this software in any circumstances.
     53  *
     54  * Ported to run under 386BSD by Julian Elischer (julian (at) tfs.com) Sept 1992
     55  */
     56 
     57 #include <sys/cdefs.h>
     58 __KERNEL_RCSID(0, "$NetBSD: scsiconf.c,v 1.237 2006/08/29 20:40:23 bjh21 Exp $");
     59 
     60 #include <sys/param.h>
     61 #include <sys/systm.h>
     62 #include <sys/kernel.h>
     63 #include <sys/proc.h>
     64 #include <sys/kthread.h>
     65 #include <sys/malloc.h>
     66 #include <sys/device.h>
     67 #include <sys/conf.h>
     68 #include <sys/fcntl.h>
     69 #include <sys/scsiio.h>
     70 #include <sys/queue.h>
     71 #include <sys/lock.h>
     72 
     73 #include <dev/scsipi/scsi_all.h>
     74 #include <dev/scsipi/scsipi_all.h>
     75 #include <dev/scsipi/scsiconf.h>
     76 
     77 #include "locators.h"
     78 
     79 static const struct scsipi_periphsw scsi_probe_dev = {
     80 	NULL,
     81 	NULL,
     82 	NULL,
     83 	NULL,
     84 };
     85 
     86 struct scsi_initq {
     87 	struct scsipi_channel *sc_channel;
     88 	TAILQ_ENTRY(scsi_initq) scsi_initq;
     89 };
     90 
     91 static TAILQ_HEAD(, scsi_initq) scsi_initq_head =
     92     TAILQ_HEAD_INITIALIZER(scsi_initq_head);
     93 static struct simplelock scsibus_interlock = SIMPLELOCK_INITIALIZER;
     94 
     95 static int	scsi_probe_device(struct scsibus_softc *, int, int);
     96 
     97 static int	scsibusmatch(struct device *, struct cfdata *, void *);
     98 static void	scsibusattach(struct device *, struct device *, void *);
     99 static int	scsibusactivate(struct device *, enum devact);
    100 static int	scsibusdetach(struct device *, int flags);
    101 static int	scsibusrescan(struct device *, const char *, const int *);
    102 static void	scsidevdetached(struct device *, struct device *);
    103 
    104 CFATTACH_DECL2(scsibus, sizeof(struct scsibus_softc),
    105     scsibusmatch, scsibusattach, scsibusdetach, scsibusactivate,
    106     scsibusrescan, scsidevdetached);
    107 
    108 extern struct cfdriver scsibus_cd;
    109 
    110 static dev_type_open(scsibusopen);
    111 static dev_type_close(scsibusclose);
    112 static dev_type_ioctl(scsibusioctl);
    113 
    114 const struct cdevsw scsibus_cdevsw = {
    115 	scsibusopen, scsibusclose, noread, nowrite, scsibusioctl,
    116 	nostop, notty, nopoll, nommap, nokqfilter,
    117 };
    118 
    119 static int	scsibusprint(void *, const char *);
    120 static void	scsibus_config(struct scsipi_channel *, void *);
    121 
    122 const struct scsipi_bustype scsi_bustype = {
    123 	SCSIPI_BUSTYPE_SCSI,
    124 	scsi_scsipi_cmd,
    125 	scsipi_interpret_sense,
    126 	scsi_print_addr,
    127 	scsi_kill_pending,
    128 };
    129 
    130 int
    131 scsiprint(void *aux, const char *pnp)
    132 {
    133 	struct scsipi_channel *chan = aux;
    134 	struct scsipi_adapter *adapt = chan->chan_adapter;
    135 
    136 	/* only "scsibus"es can attach to "scsi"s; easy. */
    137 	if (pnp)
    138 		aprint_normal("scsibus at %s", pnp);
    139 
    140 	/* don't print channel if the controller says there can be only one. */
    141 	if (adapt->adapt_nchannels != 1)
    142 		aprint_normal(" channel %d", chan->chan_channel);
    143 
    144 	return (UNCONF);
    145 }
    146 
    147 static int
    148 scsibusmatch(struct device *parent, struct cfdata *cf, void *aux)
    149 {
    150 	struct scsipi_channel *chan = aux;
    151 
    152 	if (chan->chan_bustype->bustype_type != SCSIPI_BUSTYPE_SCSI)
    153 		return 0;
    154 
    155 	if (cf->cf_loc[SCSICF_CHANNEL] != chan->chan_channel &&
    156 	    cf->cf_loc[SCSICF_CHANNEL] != SCSICF_CHANNEL_DEFAULT)
    157 		return (0);
    158 
    159 	return (1);
    160 }
    161 
    162 static void
    163 scsibusattach(struct device *parent, struct device *self, void *aux)
    164 {
    165 	struct scsibus_softc *sc = device_private(self);
    166 	struct scsipi_channel *chan = aux;
    167 	struct scsi_initq *scsi_initq;
    168 
    169 	sc->sc_channel = chan;
    170 	chan->chan_name = sc->sc_dev.dv_xname;
    171 
    172 	aprint_naive(": SCSI bus\n");
    173 	aprint_normal(": %d target%s, %d lun%s per target\n",
    174 	    chan->chan_ntargets,
    175 	    chan->chan_ntargets == 1 ? "" : "s",
    176 	    chan->chan_nluns,
    177 	    chan->chan_nluns == 1 ? "" : "s");
    178 
    179 	if (scsipi_adapter_addref(chan->chan_adapter))
    180 		return;
    181 
    182 	/* Initialize the channel structure first */
    183 	chan->chan_init_cb = scsibus_config;
    184 	chan->chan_init_cb_arg = sc;
    185 
    186 	scsi_initq = malloc(sizeof(struct scsi_initq), M_DEVBUF, M_WAITOK);
    187 	scsi_initq->sc_channel = chan;
    188 	TAILQ_INSERT_TAIL(&scsi_initq_head, scsi_initq, scsi_initq);
    189         config_pending_incr();
    190 	if (scsipi_channel_init(chan)) {
    191 		aprint_error("%s: failed to init channel\n",
    192 		    sc->sc_dev.dv_xname);
    193 		return;
    194 	}
    195 }
    196 
    197 static void
    198 scsibus_config(struct scsipi_channel *chan, void *arg)
    199 {
    200 	struct scsibus_softc *sc = arg;
    201 	struct scsi_initq *scsi_initq;
    202 
    203 #ifndef SCSI_DELAY
    204 #define SCSI_DELAY 2
    205 #endif
    206 	if ((chan->chan_flags & SCSIPI_CHAN_NOSETTLE) == 0 &&
    207 	    SCSI_DELAY > 0) {
    208 		aprint_normal(
    209 		    "%s: waiting %d seconds for devices to settle...\n",
    210 		    sc->sc_dev.dv_xname, SCSI_DELAY);
    211 		/* ...an identifier we know no one will use... */
    212 		(void) tsleep(scsibus_config, PRIBIO,
    213 		    "scsidly", SCSI_DELAY * hz);
    214 	}
    215 
    216 	/* Make sure the devices probe in scsibus order to avoid jitter. */
    217 	simple_lock(&scsibus_interlock);
    218 	for (;;) {
    219 		scsi_initq = TAILQ_FIRST(&scsi_initq_head);
    220 		if (scsi_initq->sc_channel == chan)
    221 			break;
    222 		ltsleep(&scsi_initq_head, PRIBIO, "scsi_initq", 0,
    223 		    &scsibus_interlock);
    224 	}
    225 
    226 	simple_unlock(&scsibus_interlock);
    227 
    228 	scsi_probe_bus(sc, -1, -1);
    229 
    230 	simple_lock(&scsibus_interlock);
    231 	TAILQ_REMOVE(&scsi_initq_head, scsi_initq, scsi_initq);
    232 	simple_unlock(&scsibus_interlock);
    233 
    234 	free(scsi_initq, M_DEVBUF);
    235 	wakeup(&scsi_initq_head);
    236 
    237 	scsipi_adapter_delref(chan->chan_adapter);
    238 
    239 	config_pending_decr();
    240 }
    241 
    242 static int
    243 scsibusactivate(struct device *self, enum devact act)
    244 {
    245 	struct scsibus_softc *sc = device_private(self);
    246 	struct scsipi_channel *chan = sc->sc_channel;
    247 	struct scsipi_periph *periph;
    248 	int target, lun, error = 0, s;
    249 
    250 	s = splbio();
    251 	switch (act) {
    252 	case DVACT_ACTIVATE:
    253 		error = EOPNOTSUPP;
    254 		break;
    255 
    256 	case DVACT_DEACTIVATE:
    257 		for (target = 0; target < chan->chan_ntargets;
    258 		     target++) {
    259 			if (target == chan->chan_id)
    260 				continue;
    261 			for (lun = 0; lun < chan->chan_nluns; lun++) {
    262 				periph = scsipi_lookup_periph(chan,
    263 				    target, lun);
    264 				if (periph == NULL)
    265 					continue;
    266 				error = config_deactivate(periph->periph_dev);
    267 				if (error)
    268 					goto out;
    269 			}
    270 		}
    271 		break;
    272 	}
    273  out:
    274 	splx(s);
    275 	return (error);
    276 }
    277 
    278 static int
    279 scsibusdetach(struct device *self, int flags)
    280 {
    281 	struct scsibus_softc *sc = device_private(self);
    282 	struct scsipi_channel *chan = sc->sc_channel;
    283 	struct scsipi_periph *periph;
    284 	int ctarget, clun;
    285 	struct scsipi_xfer *xs;
    286 	int error;
    287 
    288 
    289 	/*
    290 	 * Process outstanding commands (which will never complete as the
    291 	 * controller is gone).
    292 	 */
    293 	for (ctarget = 0; ctarget < chan->chan_ntargets; ctarget++) {
    294 		if (ctarget == chan->chan_id)
    295 			continue;
    296 		for (clun = 0; clun < chan->chan_nluns; clun++) {
    297 			periph = scsipi_lookup_periph(chan, ctarget, clun);
    298 			if (periph == NULL)
    299 				continue;
    300 			TAILQ_FOREACH(xs, &periph->periph_xferq, device_q) {
    301 				callout_stop(&xs->xs_callout);
    302 				xs->error = XS_DRIVER_STUFFUP;
    303 				scsipi_done(xs);
    304 			}
    305 		}
    306 	}
    307 
    308 	/*
    309 	 * Detach all of the periphs.
    310 	 */
    311 	error = scsipi_target_detach(chan, -1, -1, flags);
    312 
    313 	/*
    314 	 * Now shut down the channel.
    315 	 * XXX only if no errors ?
    316 	 */
    317 	scsipi_channel_shutdown(chan);
    318 	return (error);
    319 }
    320 
    321 /*
    322  * Probe the requested scsi bus. It must be already set up.
    323  * target and lun optionally narrow the search if not -1
    324  */
    325 int
    326 scsi_probe_bus(struct scsibus_softc *sc, int target, int lun)
    327 {
    328 	struct scsipi_channel *chan = sc->sc_channel;
    329 	int maxtarget, mintarget, maxlun, minlun;
    330 	int error;
    331 
    332 	if (target == -1) {
    333 		maxtarget = chan->chan_ntargets - 1;
    334 		mintarget = 0;
    335 	} else {
    336 		if (target < 0 || target >= chan->chan_ntargets)
    337 			return (EINVAL);
    338 		maxtarget = mintarget = target;
    339 	}
    340 
    341 	if (lun == -1) {
    342 		maxlun = chan->chan_nluns - 1;
    343 		minlun = 0;
    344 	} else {
    345 		if (lun < 0 || lun >= chan->chan_nluns)
    346 			return (EINVAL);
    347 		maxlun = minlun = lun;
    348 	}
    349 
    350 	/*
    351 	 * Some HBAs provide an abstracted view of the bus; give them an
    352 	 * oppertunity to re-scan it before we do.
    353 	 */
    354 	if (chan->chan_adapter->adapt_ioctl != NULL)
    355 		(*chan->chan_adapter->adapt_ioctl)(chan, SCBUSIOLLSCAN, NULL,
    356 		    0, curproc);
    357 
    358 	if ((error = scsipi_adapter_addref(chan->chan_adapter)) != 0)
    359 		return (error);
    360 	for (target = mintarget; target <= maxtarget; target++) {
    361 		if (target == chan->chan_id)
    362 			continue;
    363 		for (lun = minlun; lun <= maxlun; lun++) {
    364 			/*
    365 			 * See if there's a device present, and configure it.
    366 			 */
    367 			if (scsi_probe_device(sc, target, lun) == 0)
    368 				break;
    369 			/* otherwise something says we should look further */
    370 		}
    371 
    372 		/*
    373 		 * Now that we've discovered all of the LUNs on this
    374 		 * I_T Nexus, update the xfer mode for all of them
    375 		 * that we know about.
    376 		 */
    377 		scsipi_set_xfer_mode(chan, target, 1);
    378 	}
    379 	scsipi_adapter_delref(chan->chan_adapter);
    380 	return (0);
    381 }
    382 
    383 static int
    384 scsibusrescan(struct device *sc, const char *ifattr, const int *locators)
    385 {
    386 
    387 	KASSERT(ifattr && !strcmp(ifattr, "scsibus"));
    388 	KASSERT(locators);
    389 
    390 	return (scsi_probe_bus((struct scsibus_softc *)sc,
    391 		locators[SCSIBUSCF_TARGET], locators[SCSIBUSCF_LUN]));
    392 }
    393 
    394 static void
    395 scsidevdetached(struct device *sc, struct device *dev)
    396 {
    397 	struct scsibus_softc *ssc = (struct scsibus_softc *)sc;
    398 	struct scsipi_channel *chan = ssc->sc_channel;
    399 	struct scsipi_periph *periph;
    400 	int target, lun;
    401 
    402 	target = device_locator(dev, SCSIBUSCF_TARGET);
    403 	lun = device_locator(dev, SCSIBUSCF_LUN);
    404 
    405 	periph = scsipi_lookup_periph(chan, target, lun);
    406 	KASSERT(periph->periph_dev == dev);
    407 
    408 	scsipi_remove_periph(chan, periph);
    409 	free(periph, M_DEVBUF);
    410 }
    411 
    412 /*
    413  * Print out autoconfiguration information for a subdevice.
    414  *
    415  * This is a slight abuse of 'standard' autoconfiguration semantics,
    416  * because 'print' functions don't normally print the colon and
    417  * device information.  However, in this case that's better than
    418  * either printing redundant information before the attach message,
    419  * or having the device driver call a special function to print out
    420  * the standard device information.
    421  */
    422 static int
    423 scsibusprint(void *aux, const char *pnp)
    424 {
    425 	struct scsipibus_attach_args *sa = aux;
    426 	struct scsipi_inquiry_pattern *inqbuf;
    427 	u_int8_t type;
    428 	const char *dtype;
    429 	char vendor[33], product[65], revision[17];
    430 	int target, lun;
    431 
    432 	if (pnp != NULL)
    433 		aprint_normal("%s", pnp);
    434 
    435 	inqbuf = &sa->sa_inqbuf;
    436 
    437 	target = sa->sa_periph->periph_target;
    438 	lun = sa->sa_periph->periph_lun;
    439 	type = inqbuf->type & SID_TYPE;
    440 
    441 	dtype = scsipi_dtype(type);
    442 
    443 	scsipi_strvis(vendor, 33, inqbuf->vendor, 8);
    444 	scsipi_strvis(product, 65, inqbuf->product, 16);
    445 	scsipi_strvis(revision, 17, inqbuf->revision, 4);
    446 
    447 	aprint_normal(" target %d lun %d: <%s, %s, %s> %s %s",
    448 	    target, lun, vendor, product, revision, dtype,
    449 	    inqbuf->removable ? "removable" : "fixed");
    450 
    451 	return (UNCONF);
    452 }
    453 
    454 static const struct scsi_quirk_inquiry_pattern scsi_quirk_patterns[] = {
    455 	{{T_CDROM, T_REMOV,
    456 	 "CHINON  ", "CD-ROM CDS-431  ", ""},     PQUIRK_NOLUNS},
    457 	{{T_CDROM, T_REMOV,
    458 	 "CHINON  ", "CD-ROM CDS-435  ", ""},     PQUIRK_NOLUNS},
    459 	{{T_CDROM, T_REMOV,
    460 	 "Chinon  ", "CD-ROM CDS-525  ", ""},     PQUIRK_NOLUNS},
    461 	{{T_CDROM, T_REMOV,
    462 	 "CHINON  ", "CD-ROM CDS-535  ", ""},     PQUIRK_NOLUNS},
    463 	{{T_CDROM, T_REMOV,
    464 	 "DEC     ", "RRD42   (C) DEC ", ""},     PQUIRK_NOLUNS},
    465 	{{T_CDROM, T_REMOV,
    466 	 "DENON   ", "DRD-25X         ", "V"},    PQUIRK_NOLUNS},
    467 	{{T_CDROM, T_REMOV,
    468 	 "GENERIC ", "CRD-BP2         ", ""},     PQUIRK_NOLUNS},
    469 	{{T_CDROM, T_REMOV,
    470 	 "HP      ", "C4324/C4325     ", ""},     PQUIRK_NOLUNS},
    471 	{{T_CDROM, T_REMOV,
    472 	 "IMS     ", "CDD521/10       ", "2.06"}, PQUIRK_NOLUNS},
    473 	{{T_CDROM, T_REMOV,
    474 	 "MATSHITA", "CD-ROM CR-5XX   ", "1.0b"}, PQUIRK_NOLUNS},
    475 	{{T_CDROM, T_REMOV,
    476 	 "MEDAVIS ", "RENO CD-ROMX2A  ", ""},     PQUIRK_NOLUNS},
    477 	{{T_CDROM, T_REMOV,
    478 	 "MEDIAVIS", "CDR-H93MV       ", "1.3"},  PQUIRK_NOLUNS},
    479 	{{T_CDROM, T_REMOV,
    480 	 "NEC     ", "CD-ROM DRIVE:502", ""},     PQUIRK_NOLUNS},
    481 	{{T_CDROM, T_REMOV,
    482 	 "NEC     ", "CD-ROM DRIVE:55 ", ""},     PQUIRK_NOLUNS},
    483 	{{T_CDROM, T_REMOV,
    484 	 "NEC     ", "CD-ROM DRIVE:83 ", ""},     PQUIRK_NOLUNS},
    485 	{{T_CDROM, T_REMOV,
    486 	 "NEC     ", "CD-ROM DRIVE:84 ", ""},     PQUIRK_NOLUNS},
    487 	{{T_CDROM, T_REMOV,
    488 	 "NEC     ", "CD-ROM DRIVE:841", ""},     PQUIRK_NOLUNS},
    489         {{T_CDROM, T_REMOV,
    490 	 "OLYMPUS ", "CDS620E         ", "1.1d"},
    491 			       PQUIRK_NOLUNS|PQUIRK_NOSYNC|PQUIRK_NOCAPACITY},
    492 	{{T_CDROM, T_REMOV,
    493 	 "PIONEER ", "CD-ROM DR-124X  ", "1.01"}, PQUIRK_NOLUNS},
    494         {{T_CDROM, T_REMOV,
    495          "PLEXTOR ", "CD-ROM PX-4XCS  ", "1.01"},
    496                                PQUIRK_NOLUNS|PQUIRK_NOSYNC},
    497 	{{T_CDROM, T_REMOV,
    498 	 "SONY    ", "CD-ROM CDU-541  ", ""},     PQUIRK_NOLUNS},
    499 	{{T_CDROM, T_REMOV,
    500 	 "SONY    ", "CD-ROM CDU-55S  ", ""},     PQUIRK_NOLUNS},
    501 	{{T_CDROM, T_REMOV,
    502 	 "SONY    ", "CD-ROM CDU-561  ", ""},     PQUIRK_NOLUNS},
    503 	{{T_CDROM, T_REMOV,
    504 	 "SONY    ", "CD-ROM CDU-76S", ""},
    505 				PQUIRK_NOLUNS|PQUIRK_NOSYNC|PQUIRK_NOWIDE},
    506 	{{T_CDROM, T_REMOV,
    507 	 "SONY    ", "CD-ROM CDU-8003A", ""},     PQUIRK_NOLUNS},
    508 	{{T_CDROM, T_REMOV,
    509 	 "SONY    ", "CD-ROM CDU-8012 ", ""},     PQUIRK_NOLUNS},
    510 	{{T_CDROM, T_REMOV,
    511 	 "TEAC    ", "CD-ROM          ", "1.06"}, PQUIRK_NOLUNS},
    512 	{{T_CDROM, T_REMOV,
    513 	 "TEAC    ", "CD-ROM CD-56S   ", "1.0B"}, PQUIRK_NOLUNS},
    514 	{{T_CDROM, T_REMOV,
    515 	 "TEXEL   ", "CD-ROM          ", "1.06"}, PQUIRK_NOLUNS},
    516 	{{T_CDROM, T_REMOV,
    517 	 "TEXEL   ", "CD-ROM DM-XX24 K", "1.09"}, PQUIRK_NOLUNS},
    518 	{{T_CDROM, T_REMOV,
    519 	 "TEXEL   ", "CD-ROM DM-XX24 K", "1.10"}, PQUIRK_NOLUNS},
    520 	{{T_CDROM, T_REMOV,
    521 	 "TOSHIBA ", "XM-4101TASUNSLCD", ""}, PQUIRK_NOLUNS|PQUIRK_NOSYNC},
    522 	/* "IBM CDRM00201     !F" 0724 is an IBM OEM Toshiba XM-4101BME */
    523 	{{T_CDROM, T_REMOV,
    524 	 "IBM     ", "CDRM00201     !F", "0724"}, PQUIRK_NOLUNS|PQUIRK_NOSYNC},
    525 	{{T_CDROM, T_REMOV,
    526 	 "ShinaKen", "CD-ROM DM-3x1S",   "1.04"}, PQUIRK_NOLUNS},
    527 	{{T_CDROM, T_REMOV,
    528 	 "JVC     ", "R2626",            ""},     PQUIRK_NOLUNS},
    529 	{{T_CDROM, T_REMOV,
    530 	 "YAMAHA", "CRW8424S",           ""},     PQUIRK_NOLUNS},
    531 	{{T_CDROM, T_REMOV,
    532 	 "NEC     ", "CD-ROM DRIVE:222", ""},	  PQUIRK_NOLUNS|PQUIRK_NOSYNC},
    533 
    534 	{{T_DIRECT, T_FIXED,
    535 	 "MICROP  ", "1588-15MBSUN0669", ""},     PQUIRK_AUTOSAVE},
    536 	{{T_DIRECT, T_FIXED,
    537 	 "MICROP  ", "2217-15MQ1091501", ""},     PQUIRK_NOSYNCCACHE},
    538 	{{T_OPTICAL, T_REMOV,
    539 	 "EPSON   ", "OMD-5010        ", "3.08"}, PQUIRK_NOLUNS},
    540 	{{T_DIRECT, T_FIXED,
    541 	 "ADAPTEC ", "AEC-4412BD",       "1.2A"}, PQUIRK_NOMODESENSE},
    542 	{{T_DIRECT, T_FIXED,
    543 	 "ADAPTEC ", "ACB-4000",         ""},     PQUIRK_FORCELUNS|PQUIRK_AUTOSAVE|PQUIRK_NOMODESENSE},
    544 	{{T_DIRECT, T_FIXED,
    545 	 "DEC     ", "RZ55     (C) DEC", ""},     PQUIRK_AUTOSAVE},
    546 	{{T_DIRECT, T_FIXED,
    547 	 "EMULEX  ", "MD21/S2     ESDI", "A00"},
    548 				PQUIRK_FORCELUNS|PQUIRK_AUTOSAVE},
    549 	{{T_DIRECT, T_FIXED,
    550 	 "MICROP",  "1548-15MZ1077801",  "HZ2P"}, PQUIRK_NOTAG},
    551 	{{T_DIRECT, T_FIXED,
    552 	 "HP      ", "C372",             ""},     PQUIRK_NOTAG},
    553 	{{T_DIRECT, T_FIXED,
    554 	 "IBMRAID ", "0662S",		 ""},     PQUIRK_AUTOSAVE},
    555 	{{T_DIRECT, T_FIXED,
    556 	 "IBM     ", "0663H",		 ""},     PQUIRK_AUTOSAVE},
    557 	{{T_DIRECT, T_FIXED,
    558 	 "IBM",	     "0664",		 ""},     PQUIRK_AUTOSAVE},
    559 	{{T_DIRECT, T_FIXED,
    560 	/* improperly report DT-only sync mode */
    561 	 "IBM     ", "DXHS36D",		 ""},
    562 				PQUIRK_CAP_SYNC|PQUIRK_CAP_WIDE16},
    563 	{{T_DIRECT, T_FIXED,
    564 	 "IBM     ", "DXHS18Y",		 ""},
    565 				PQUIRK_CAP_SYNC|PQUIRK_CAP_WIDE16},
    566 	{{T_DIRECT, T_FIXED,
    567 	 "IBM     ", "H3171-S2",	 ""},
    568 				PQUIRK_NOLUNS|PQUIRK_AUTOSAVE},
    569 	{{T_DIRECT, T_FIXED,
    570 	 "IBM     ", "KZ-C",		 ""},	  PQUIRK_AUTOSAVE},
    571 	/* Broken IBM disk */
    572 	{{T_DIRECT, T_FIXED,
    573 	 ""	   , "DFRSS2F",		 ""},	  PQUIRK_AUTOSAVE},
    574 	{{T_DIRECT, T_REMOV,
    575 	 "MPL     ", "MC-DISK-        ", ""},     PQUIRK_NOLUNS},
    576 	{{T_DIRECT, T_FIXED,
    577 	 "MAXTOR  ", "XT-3280         ", ""},     PQUIRK_NOLUNS},
    578 	{{T_DIRECT, T_FIXED,
    579 	 "MAXTOR  ", "XT-4380S        ", ""},     PQUIRK_NOLUNS},
    580 	{{T_DIRECT, T_FIXED,
    581 	 "MAXTOR  ", "MXT-1240S       ", ""},     PQUIRK_NOLUNS},
    582 	{{T_DIRECT, T_FIXED,
    583 	 "MAXTOR  ", "XT-4170S        ", ""},     PQUIRK_NOLUNS},
    584 	{{T_DIRECT, T_FIXED,
    585 	 "MAXTOR  ", "XT-8760S",         ""},     PQUIRK_NOLUNS},
    586 	{{T_DIRECT, T_FIXED,
    587 	 "MAXTOR  ", "LXT-213S        ", ""},     PQUIRK_NOLUNS},
    588 	{{T_DIRECT, T_FIXED,
    589 	 "MAXTOR  ", "LXT-213S SUN0207", ""},     PQUIRK_NOLUNS},
    590 	{{T_DIRECT, T_FIXED,
    591 	 "MAXTOR  ", "LXT-200S        ", ""},     PQUIRK_NOLUNS},
    592 	{{T_DIRECT, T_FIXED,
    593 	 "MEGADRV ", "EV1000",           ""},     PQUIRK_NOMODESENSE},
    594 	{{T_DIRECT, T_FIXED,
    595 	 "MICROP", "1991-27MZ",          ""},     PQUIRK_NOTAG},
    596 	{{T_DIRECT, T_FIXED,
    597 	 "MST     ", "SnapLink        ", ""},     PQUIRK_NOLUNS},
    598 	{{T_DIRECT, T_FIXED,
    599 	 "NEC     ", "D3847           ", "0307"}, PQUIRK_NOLUNS},
    600 	{{T_DIRECT, T_FIXED,
    601 	 "QUANTUM ", "ELS85S          ", ""},     PQUIRK_AUTOSAVE},
    602 	{{T_DIRECT, T_FIXED,
    603 	 "QUANTUM ", "LPS525S         ", ""},     PQUIRK_NOLUNS},
    604 	{{T_DIRECT, T_FIXED,
    605 	 "QUANTUM ", "P105S 910-10-94x", ""},     PQUIRK_NOLUNS},
    606 	{{T_DIRECT, T_FIXED,
    607 	 "QUANTUM ", "PD1225S         ", ""},     PQUIRK_NOLUNS},
    608 	{{T_DIRECT, T_FIXED,
    609 	 "QUANTUM ", "PD210S   SUN0207", ""},     PQUIRK_NOLUNS},
    610 	{{T_DIRECT, T_FIXED,
    611 	 "QUANTUM ", "ATLAS IV 9 WLS", "0A0A"},   PQUIRK_CAP_NODT},
    612 	{{T_DIRECT, T_FIXED,
    613 	 "RODIME  ", "RO3000S         ", ""},     PQUIRK_NOLUNS},
    614 	{{T_DIRECT, T_FIXED,
    615 	 "SEAGATE ", "ST125N          ", ""},     PQUIRK_NOLUNS},
    616 	{{T_DIRECT, T_FIXED,
    617 	 "SEAGATE ", "ST157N          ", ""},     PQUIRK_NOLUNS},
    618 	{{T_DIRECT, T_FIXED,
    619 	 "SEAGATE ", "ST296           ", ""},     PQUIRK_NOLUNS},
    620 	{{T_DIRECT, T_FIXED,
    621 	 "SEAGATE ", "ST296N          ", ""},     PQUIRK_NOLUNS},
    622 	{{T_DIRECT, T_FIXED,
    623 	 "SEAGATE ", "ST318404LC      ", ""},     PQUIRK_NOLUNS},
    624 	{{T_DIRECT, T_FIXED,
    625 	 "SEAGATE ", "ST15150N        ", ""},     PQUIRK_NOTAG},
    626 	{{T_DIRECT, T_FIXED,
    627 	 "SEAGATE ", "ST19171",          ""},     PQUIRK_NOMODESENSE},
    628 	{{T_DIRECT, T_FIXED,
    629 	 "SEAGATE ", "ST32430N",         ""},     PQUIRK_CAP_SYNC},
    630 	{{T_DIRECT, T_FIXED,
    631 	 "SEAGATE ", "ST34501FC       ", ""},     PQUIRK_NOMODESENSE},
    632 	{{T_DIRECT, T_FIXED,
    633 	 "SEAGATE ", "SX910800N",        ""},     PQUIRK_NOTAG},
    634 	{{T_DIRECT, T_FIXED,
    635 	 "TOSHIBA ", "MK538FB         ", "6027"}, PQUIRK_NOLUNS},
    636 	{{T_DIRECT, T_FIXED,
    637 	 "MICROP  ", "1924",          ""},     PQUIRK_CAP_SYNC},
    638 	{{T_DIRECT, T_FIXED,
    639 	 "FUJITSU ", "M2266",         ""},     PQUIRK_CAP_SYNC},
    640 	{{T_DIRECT, T_FIXED,
    641 	 "FUJITSU ", "M2624S-512      ", ""},     PQUIRK_CAP_SYNC},
    642 
    643 	{{T_DIRECT, T_REMOV,
    644 	 "IOMEGA", "ZIP 100",		 "J.03"}, PQUIRK_NOLUNS},
    645 	{{T_DIRECT, T_REMOV,
    646 	 "INSITE", "I325VM",             ""},     PQUIRK_NOLUNS},
    647 
    648 	/* XXX: QIC-36 tape behind Emulex adapter.  Very broken. */
    649 	{{T_SEQUENTIAL, T_REMOV,
    650 	 "        ", "                ", "    "}, PQUIRK_NOLUNS},
    651 	{{T_SEQUENTIAL, T_REMOV,
    652 	 "EMULEX  ", "MT-02 QIC       ", ""},     PQUIRK_NOLUNS},
    653 	{{T_SEQUENTIAL, T_REMOV,
    654 	 "CALIPER ", "CP150           ", ""},     PQUIRK_NOLUNS},
    655 	{{T_SEQUENTIAL, T_REMOV,
    656 	 "EXABYTE ", "EXB-8200        ", ""},     PQUIRK_NOLUNS},
    657 	{{T_SEQUENTIAL, T_REMOV,
    658 	 "SONY    ", "GY-10C          ", ""},     PQUIRK_NOLUNS},
    659 	{{T_SEQUENTIAL, T_REMOV,
    660 	 "SONY    ", "SDT-2000        ", "2.09"}, PQUIRK_NOLUNS},
    661 	{{T_SEQUENTIAL, T_REMOV,
    662 	 "SONY    ", "SDT-5000        ", "3."},   PQUIRK_NOSYNC|PQUIRK_NOWIDE},
    663 	{{T_SEQUENTIAL, T_REMOV,
    664 	 "SONY    ", "SDT-5200        ", "3."},   PQUIRK_NOLUNS},
    665 	{{T_SEQUENTIAL, T_REMOV,
    666 	 "TANDBERG", " TDC 3600       ", ""},     PQUIRK_NOLUNS},
    667 	/* Following entry reported as a Tandberg 3600; ref. PR1933 */
    668 	{{T_SEQUENTIAL, T_REMOV,
    669 	 "ARCHIVE ", "VIPER 150  21247", ""},     PQUIRK_NOLUNS},
    670 	/* Following entry for a Cipher ST150S; ref. PR4171 */
    671 	{{T_SEQUENTIAL, T_REMOV,
    672 	 "ARCHIVE ", "VIPER 1500 21247", "2.2G"}, PQUIRK_NOLUNS},
    673 	{{T_SEQUENTIAL, T_REMOV,
    674 	 "ARCHIVE ", "Python 28454-XXX", ""},     PQUIRK_NOLUNS},
    675 	{{T_SEQUENTIAL, T_REMOV,
    676 	 "WANGTEK ", "5099ES SCSI",      ""},     PQUIRK_NOLUNS},
    677 	{{T_SEQUENTIAL, T_REMOV,
    678 	 "WANGTEK ", "5150ES SCSI",      ""},     PQUIRK_NOLUNS},
    679 	{{T_SEQUENTIAL, T_REMOV,
    680 	 "WANGTEK ", "SCSI-36",		 ""},     PQUIRK_NOLUNS},
    681 	{{T_SEQUENTIAL, T_REMOV,
    682 	 "WangDAT ", "Model 1300      ", "02.4"}, PQUIRK_NOSYNC|PQUIRK_NOWIDE},
    683 	{{T_SEQUENTIAL, T_REMOV,
    684 	 "WangDAT ", "Model 2600      ", "01.7"}, PQUIRK_NOSYNC|PQUIRK_NOWIDE},
    685 	{{T_SEQUENTIAL, T_REMOV,
    686 	 "WangDAT ", "Model 3200      ", "02.2"}, PQUIRK_NOSYNC|PQUIRK_NOWIDE},
    687 	{{T_SEQUENTIAL, T_REMOV,
    688 	 "TEAC    ", "MT-2ST/N50      ", ""},     PQUIRK_NOLUNS},
    689 
    690 	{{T_SCANNER, T_FIXED,
    691 	 "RICOH   ", "IS60            ", "1R08"}, PQUIRK_NOLUNS},
    692 	{{T_SCANNER, T_FIXED,
    693 	 "UMAX    ", "Astra 1200S     ", "V2.9"}, PQUIRK_NOLUNS},
    694 	{{T_SCANNER, T_FIXED,
    695 	 "UMAX    ", "Astra 1220S     ", ""},     PQUIRK_NOLUNS},
    696 	{{T_SCANNER, T_FIXED,
    697 	 "UMAX    ", "UMAX S-6E       ", "V2.0"}, PQUIRK_NOLUNS},
    698 	{{T_SCANNER, T_FIXED,
    699 	 "UMAX    ", "UMAX S-12       ", "V2.1"}, PQUIRK_NOLUNS},
    700 	{{T_SCANNER, T_FIXED,
    701 	 "ULTIMA  ", "A6000C          ", ""},     PQUIRK_NOLUNS},
    702 	{{T_PROCESSOR, T_FIXED,
    703 	 "SYMBIOS",  "",                 ""},     PQUIRK_NOLUNS},
    704 	{{T_PROCESSOR, T_FIXED,
    705 	 "LITRONIC", "PCMCIA          ", ""},     PQUIRK_NOLUNS},
    706 	{{T_CHANGER, T_REMOV,
    707 	 "SONY    ", "CDL1100         ", ""},     PQUIRK_NOLUNS},
    708 	{{T_ENCLOSURE, T_FIXED,
    709 	 "SUN     ", "SENA            ", ""},     PQUIRK_NOLUNS},
    710 };
    711 
    712 /*
    713  * given a target and lun, ask the device what
    714  * it is, and find the correct driver table
    715  * entry.
    716  */
    717 static int
    718 scsi_probe_device(struct scsibus_softc *sc, int target, int lun)
    719 {
    720 	struct scsipi_channel *chan = sc->sc_channel;
    721 	struct scsipi_periph *periph;
    722 	struct scsipi_inquiry_data inqbuf;
    723 	const struct scsi_quirk_inquiry_pattern *finger;
    724 	int checkdtype, priority, docontinue, quirks;
    725 	struct scsipibus_attach_args sa;
    726 	struct cfdata *cf;
    727 	int locs[SCSIBUSCF_NLOCS];
    728 	struct device *chld;
    729 
    730 	/*
    731 	 * Assume no more luns to search after this one.
    732 	 * If we successfully get Inquiry data and after
    733 	 * merging quirks we find we can probe for more
    734 	 * luns, we will.
    735 	 */
    736 	docontinue = 0;
    737 
    738 	/* Skip this slot if it is already attached. */
    739 	if (scsipi_lookup_periph(chan, target, lun) != NULL)
    740 		return (docontinue);
    741 
    742 	periph = scsipi_alloc_periph(M_NOWAIT);
    743 	if (periph == NULL) {
    744 #ifdef	DIAGNOSTIC
    745 		aprint_error(
    746 		    "%s: cannot allocate periph for target %d lun %d\n",
    747 		    sc->sc_dev.dv_xname, target, lun);
    748 #endif
    749 		return (ENOMEM);
    750 	}
    751 	periph->periph_channel = chan;
    752 	periph->periph_switch = &scsi_probe_dev;
    753 
    754 	periph->periph_target = target;
    755 	periph->periph_lun = lun;
    756 	periph->periph_quirks = chan->chan_defquirks;
    757 
    758 #ifdef SCSIPI_DEBUG
    759 	if (SCSIPI_DEBUG_TYPE == SCSIPI_BUSTYPE_SCSI &&
    760 	    SCSIPI_DEBUG_TARGET == target &&
    761 	    SCSIPI_DEBUG_LUN == lun)
    762 		periph->periph_dbflags |= SCSIPI_DEBUG_FLAGS;
    763 #endif
    764 
    765 	/*
    766 	 * Ask the device what it is
    767 	 */
    768 
    769 #ifdef SCSI_2_DEF
    770 	/* some devices need to be told to go to SCSI2 */
    771 	/* However some just explode if you tell them this.. leave it out */
    772 	scsi_change_def(periph, XS_CTL_DISCOVERY | XS_CTL_SILENT);
    773 #endif /* SCSI_2_DEF */
    774 
    775 	/* Now go ask the device all about itself. */
    776 	memset(&inqbuf, 0, sizeof(inqbuf));
    777 	{
    778 		u_int8_t *extension = &inqbuf.flags1;
    779 		int len = 0;
    780 		while (len < 3)
    781 			extension[len++] = '\0';
    782 		while (len < 3 + 28)
    783 			extension[len++] = ' ';
    784 		while (len < 3 + 28 + 20)
    785 			extension[len++] = '\0';
    786 		while (len < 3 + 28 + 20 + 1)
    787 			extension[len++] = '\0';
    788 		while (len < 3 + 28 + 20 + 1 + 1)
    789 			extension[len++] = '\0';
    790 		while (len < 3 + 28 + 20 + 1 + 1 + (8*2))
    791 			extension[len++] = ' ';
    792 	}
    793 	if (scsipi_inquire(periph, &inqbuf,
    794 	    XS_CTL_DISCOVERY | XS_CTL_DATA_ONSTACK | XS_CTL_SILENT) != 0)
    795 		goto bad;
    796 
    797 	periph->periph_type = inqbuf.device & SID_TYPE;
    798 	if (inqbuf.dev_qual2 & SID_REMOVABLE)
    799 		periph->periph_flags |= PERIPH_REMOVABLE;
    800 	periph->periph_version = inqbuf.version & SID_ANSII;
    801 
    802 	/*
    803 	 * Any device qualifier that has the top bit set (qualifier&4 != 0)
    804 	 * is vendor specific and won't match in this switch.
    805 	 * All we do here is throw out bad/negative responses.
    806 	 */
    807 	checkdtype = 0;
    808 	switch (inqbuf.device & SID_QUAL) {
    809 	case SID_QUAL_LU_PRESENT:
    810 		checkdtype = 1;
    811 		break;
    812 
    813 	case SID_QUAL_LU_NOTPRESENT:
    814 	case SID_QUAL_reserved:
    815 	case SID_QUAL_LU_NOT_SUPP:
    816 		goto bad;
    817 
    818 	default:
    819 		break;
    820 	}
    821 
    822 	/* Let the adapter driver handle the device separatley if it wants. */
    823 	if (chan->chan_adapter->adapt_accesschk != NULL &&
    824 	    (*chan->chan_adapter->adapt_accesschk)(periph, &sa.sa_inqbuf))
    825 		goto bad;
    826 
    827 	if (checkdtype) {
    828 		switch (periph->periph_type) {
    829 		case T_DIRECT:
    830 		case T_SEQUENTIAL:
    831 		case T_PRINTER:
    832 		case T_PROCESSOR:
    833 		case T_WORM:
    834 		case T_CDROM:
    835 		case T_SCANNER:
    836 		case T_OPTICAL:
    837 		case T_CHANGER:
    838 		case T_COMM:
    839 		case T_IT8_1:
    840 		case T_IT8_2:
    841 		case T_STORARRAY:
    842 		case T_ENCLOSURE:
    843 		case T_SIMPLE_DIRECT:
    844 		case T_OPTIC_CARD_RW:
    845 		case T_OBJECT_STORED:
    846 		default:
    847 			break;
    848 		case T_NODEVICE:
    849 			goto bad;
    850 		}
    851 	}
    852 
    853 	sa.sa_periph = periph;
    854 	sa.sa_inqbuf.type = inqbuf.device;
    855 	sa.sa_inqbuf.removable = inqbuf.dev_qual2 & SID_REMOVABLE ?
    856 	    T_REMOV : T_FIXED;
    857 	sa.sa_inqbuf.vendor = inqbuf.vendor;
    858 	sa.sa_inqbuf.product = inqbuf.product;
    859 	sa.sa_inqbuf.revision = inqbuf.revision;
    860 	sa.scsipi_info.scsi_version = inqbuf.version;
    861 	sa.sa_inqptr = &inqbuf;
    862 
    863 	finger = scsipi_inqmatch(
    864 	    &sa.sa_inqbuf, scsi_quirk_patterns,
    865 	    sizeof(scsi_quirk_patterns)/sizeof(scsi_quirk_patterns[0]),
    866 	    sizeof(scsi_quirk_patterns[0]), &priority);
    867 
    868 	if (finger != NULL)
    869 		quirks = finger->quirks;
    870 	else
    871 		quirks = 0;
    872 
    873 	/*
    874 	 * Determine the operating mode capabilities of the device.
    875 	 */
    876 	if (periph->periph_version >= 2) {
    877 		if ((inqbuf.flags3 & SID_CmdQue) != 0 &&
    878 		    (quirks & PQUIRK_NOTAG) == 0)
    879 			periph->periph_cap |= PERIPH_CAP_TQING;
    880 		if ((inqbuf.flags3 & SID_Linked) != 0)
    881 			periph->periph_cap |= PERIPH_CAP_LINKCMDS;
    882 		if ((inqbuf.flags3 & SID_Sync) != 0 &&
    883 		    (quirks & PQUIRK_NOSYNC) == 0)
    884 			periph->periph_cap |= PERIPH_CAP_SYNC;
    885 		if ((inqbuf.flags3 & SID_WBus16) != 0 &&
    886 		    (quirks & PQUIRK_NOWIDE) == 0)
    887 			periph->periph_cap |= PERIPH_CAP_WIDE16;
    888 		if ((inqbuf.flags3 & SID_WBus32) != 0 &&
    889 		    (quirks & PQUIRK_NOWIDE) == 0)
    890 			periph->periph_cap |= PERIPH_CAP_WIDE32;
    891 		if ((inqbuf.flags3 & SID_SftRe) != 0)
    892 			periph->periph_cap |= PERIPH_CAP_SFTRESET;
    893 		if ((inqbuf.flags3 & SID_RelAdr) != 0)
    894 			periph->periph_cap |= PERIPH_CAP_RELADR;
    895 		/* SPC-2 */
    896 		if (periph->periph_version >= 3 &&
    897 		    !(quirks & PQUIRK_CAP_NODT)){
    898 			/*
    899 			 * Report ST clocking though CAP_WIDExx/CAP_SYNC.
    900 			 * If the device only supports DT, clear these
    901 			 * flags (DT implies SYNC and WIDE)
    902 			 */
    903 			switch (inqbuf.flags4 & SID_Clocking) {
    904 			case SID_CLOCKING_DT_ONLY:
    905 				periph->periph_cap &=
    906 				    ~(PERIPH_CAP_SYNC |
    907 				      PERIPH_CAP_WIDE16 |
    908 				      PERIPH_CAP_WIDE32);
    909 				/* FALLTHROUGH */
    910 			case SID_CLOCKING_SD_DT:
    911 				periph->periph_cap |= PERIPH_CAP_DT;
    912 				break;
    913 			default: /* ST only or invalid */
    914 				/* nothing to do */
    915 				break;
    916 			}
    917 		}
    918 		if (periph->periph_version >= 3) {
    919 			if (inqbuf.flags4 & SID_IUS)
    920 				periph->periph_cap |= PERIPH_CAP_IUS;
    921 			if (inqbuf.flags4 & SID_QAS)
    922 				periph->periph_cap |= PERIPH_CAP_QAS;
    923 		}
    924 	}
    925 	if (quirks & PQUIRK_CAP_SYNC)
    926 		periph->periph_cap |= PERIPH_CAP_SYNC;
    927 	if (quirks & PQUIRK_CAP_WIDE16)
    928 		periph->periph_cap |= PERIPH_CAP_WIDE16;
    929 
    930 	/*
    931 	 * Now apply any quirks from the table.
    932 	 */
    933 	periph->periph_quirks |= quirks;
    934 	if (periph->periph_version == 0 &&
    935 	    (periph->periph_quirks & PQUIRK_FORCELUNS) == 0)
    936 		periph->periph_quirks |= PQUIRK_NOLUNS;
    937 
    938 	if ((periph->periph_quirks & PQUIRK_NOLUNS) == 0)
    939 		docontinue = 1;
    940 
    941 	locs[SCSIBUSCF_TARGET] = target;
    942 	locs[SCSIBUSCF_LUN] = lun;
    943 
    944 	if ((cf = config_search_loc(config_stdsubmatch, &sc->sc_dev,
    945 	     "scsibus", locs, &sa)) != NULL) {
    946 		scsipi_insert_periph(chan, periph);
    947 		/*
    948 		 * XXX Can't assign periph_dev here, because we'll
    949 		 * XXX need it before config_attach() returns.  Must
    950 		 * XXX assign it in periph driver.
    951 		 */
    952 		chld = config_attach_loc(&sc->sc_dev, cf, locs, &sa,
    953 					 scsibusprint);
    954 	} else {
    955 		scsibusprint(&sa, sc->sc_dev.dv_xname);
    956 		aprint_normal(" not configured\n");
    957 		goto bad;
    958 	}
    959 
    960 	return (docontinue);
    961 
    962 bad:
    963 	free(periph, M_DEVBUF);
    964 	return (docontinue);
    965 }
    966 
    967 /****** Entry points for user control of the SCSI bus. ******/
    968 
    969 static int
    970 scsibusopen(dev_t dev, int flag, int fmt, struct lwp *l)
    971 {
    972 	struct scsibus_softc *sc;
    973 	int error, unit = minor(dev);
    974 
    975 	if (unit >= scsibus_cd.cd_ndevs ||
    976 	    (sc = scsibus_cd.cd_devs[unit]) == NULL)
    977 		return (ENXIO);
    978 
    979 	if (sc->sc_flags & SCSIBUSF_OPEN)
    980 		return (EBUSY);
    981 
    982 	if ((error = scsipi_adapter_addref(sc->sc_channel->chan_adapter)) != 0)
    983 		return (error);
    984 
    985 	sc->sc_flags |= SCSIBUSF_OPEN;
    986 
    987 	return (0);
    988 }
    989 
    990 static int
    991 scsibusclose(dev_t dev, int flag, int fmt, struct lwp *l)
    992 {
    993 	struct scsibus_softc *sc = scsibus_cd.cd_devs[minor(dev)];
    994 
    995 	scsipi_adapter_delref(sc->sc_channel->chan_adapter);
    996 
    997 	sc->sc_flags &= ~SCSIBUSF_OPEN;
    998 
    999 	return (0);
   1000 }
   1001 
   1002 static int
   1003 scsibusioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct lwp *l)
   1004 {
   1005 	struct scsibus_softc *sc = scsibus_cd.cd_devs[minor(dev)];
   1006 	struct scsipi_channel *chan = sc->sc_channel;
   1007 	int error;
   1008 
   1009 	/*
   1010 	 * Enforce write permission for ioctls that change the
   1011 	 * state of the bus.  Host adapter specific ioctls must
   1012 	 * be checked by the adapter driver.
   1013 	 */
   1014 	switch (cmd) {
   1015 	case SCBUSIOSCAN:
   1016 	case SCBUSIODETACH:
   1017 	case SCBUSIORESET:
   1018 		if ((flag & FWRITE) == 0)
   1019 			return (EBADF);
   1020 	}
   1021 
   1022 	switch (cmd) {
   1023 	case SCBUSIOSCAN:
   1024 	    {
   1025 		struct scbusioscan_args *a =
   1026 		    (struct scbusioscan_args *)addr;
   1027 
   1028 		error = scsi_probe_bus(sc, a->sa_target, a->sa_lun);
   1029 		break;
   1030 	    }
   1031 
   1032 	case SCBUSIODETACH:
   1033 	    {
   1034 		struct scbusiodetach_args *a =
   1035 		    (struct scbusiodetach_args *)addr;
   1036 
   1037 		error = scsipi_target_detach(chan, a->sa_target, a->sa_lun, 0);
   1038 		break;
   1039 	    }
   1040 
   1041 
   1042 	case SCBUSIORESET:
   1043 		/* FALLTHROUGH */
   1044 	default:
   1045 		if (chan->chan_adapter->adapt_ioctl == NULL)
   1046 			error = ENOTTY;
   1047 		else
   1048 			error = (*chan->chan_adapter->adapt_ioctl)(chan,
   1049 			    cmd, addr, flag, l->l_proc);
   1050 		break;
   1051 	}
   1052 
   1053 	return (error);
   1054 }
   1055