path: root/sys/scsi/scsiconf.c

/*	$OpenBSD: scsiconf.c,v 1.100 2006/01/21 12:18:49 miod Exp $	*/
/*	$NetBSD: scsiconf.c,v 1.57 1996/05/02 01:09:01 neil Exp $	*/

/*
 * Copyright (c) 1994 Charles Hannum.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by Charles Hannum.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Originally written by Julian Elischer (julian@tfs.com)
 * for TRW Financial Systems for use under the MACH(2.5) operating system.
 *
 * TRW Financial Systems, in accordance with their agreement with Carnegie
 * Mellon University, makes this software available to CMU to distribute
 * or use in any manner that they see fit as long as this message is kept with
 * the software. For this reason TFS also grants any other persons or
 * organisations permission to use or modify this software.
 *
 * TFS supplies this software to be publicly redistributed
 * on the understanding that TFS is not responsible for the correct
 * functioning of this software in any circumstances.
 *
 * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
 */

#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/device.h>

#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>

#if 0
#if NCALS > 0
	{ T_PROCESSOR, T_FIXED, 1,
	  0, 0, 0 },
#endif	/* NCALS */
#if NBLL > 0
	{ T_PROCESSOR, T_FIXED, 1,
	  "AEG     ", "READER          ", "V1.0" },
#endif	/* NBLL */
#if NKIL > 0
	{ T_SCANNER, T_FIXED, 0,
	  "KODAK   ", "IL Scanner 900  ", 0 },
#endif	/* NKIL */
#endif

/*
 * Declarations
 */
int scsi_probedev(struct scsibus_softc *, struct scsi_inquiry_data *, int,
    int);
int scsi_probe_bus(int bus, int target, int lun);

struct scsi_device probe_switch = {
	NULL,
	NULL,
	NULL,
	NULL,
};

int scsibusmatch(struct device *, void *, void *);
void scsibusattach(struct device *, struct device *, void *);
int  scsibusactivate(struct device *, enum devact);
int  scsibusdetach(struct device *, int);

int scsibussubmatch(struct device *, void *, void *);



struct cfattach scsibus_ca = {
	sizeof(struct scsibus_softc), scsibusmatch, scsibusattach,
	scsibusdetach, scsibusactivate
};

struct cfdriver scsibus_cd = {
	NULL, "scsibus", DV_DULL
};

int scsidebug_buses = SCSIDEBUG_BUSES;
int scsidebug_targets = SCSIDEBUG_TARGETS;
int scsidebug_luns = SCSIDEBUG_LUNS;
int scsidebug_level = SCSIDEBUG_LEVEL;

int scsiforcelun_buses = SCSIFORCELUN_BUSES;
int scsiforcelun_targets = SCSIFORCELUN_TARGETS;

int scsi_autoconf = SCSI_AUTOCONF;

int scsibusprint(void *, const char *);

int
scsiprint(aux, pnp)
	void *aux;
	const char *pnp;
{
	/* only "scsibus"es can attach to "scsi"s; easy. */
	if (pnp)
		printf("scsibus at %s", pnp);

	return (UNCONF);
}

int
scsibusmatch(parent, match, aux)
	struct device *parent;
	void *match, *aux;
{

	return 1;
}

/*
 * The routine called by the adapter boards to get all their
 * devices configured in.
 */
void
scsibusattach(parent, self, aux)
	struct device *parent, *self;
	void *aux;
{
	struct scsibus_softc *sb = (struct scsibus_softc *)self;
	struct scsi_link *sc_link_proto = aux;
	int nbytes, i;

	if (!cold)
		scsi_autoconf = 0;

	sc_link_proto->scsibus = sb->sc_dev.dv_unit;
	sb->adapter_link = sc_link_proto;
	if (sb->adapter_link->adapter_buswidth == 0)
		sb->adapter_link->adapter_buswidth = 8;
	sb->sc_buswidth = sb->adapter_link->adapter_buswidth;
	if (sb->adapter_link->luns == 0)
		sb->adapter_link->luns = 8;

	printf(": %d targets\n", sb->sc_buswidth);

	/* Initialize shared data. */
	scsi_init();

	nbytes = sb->sc_buswidth * sizeof(struct scsi_link **);
	sb->sc_link = (struct scsi_link ***)malloc(nbytes, M_DEVBUF, M_NOWAIT);
	if (sb->sc_link == NULL)
		panic("scsibusattach: can't allocate target links");
	nbytes = 8 * sizeof(struct scsi_link *);
	for (i = 0; i < sb->sc_buswidth; i++) {
		sb->sc_link[i] = (struct scsi_link **)malloc(nbytes,
		    M_DEVBUF, M_NOWAIT);
		if (sb->sc_link[i] == NULL)
			panic("scsibusattach: can't allocate lun links");
		bzero(sb->sc_link[i], nbytes);
	}

	scsi_probe_bus(sb->sc_dev.dv_unit, -1, -1);
}


int
scsibusactivate(dev, act)
	struct device *dev;
	enum devact act;
{
	return (config_activate_children(dev, act));
}

int  
scsibusdetach(dev, type)
	struct device *dev;
	int type;
{
	struct scsibus_softc *sb = (struct scsibus_softc *)dev;
	int i, error;

	if ((error = config_detach_children(dev, type)) != 0)
		return (error);

	for (i = 0; i < sb->sc_buswidth; i++) {
		if (sb->sc_link[i] != NULL)
			free(sb->sc_link[i], M_DEVBUF);
	}
	
	free(sb->sc_link, M_DEVBUF);

	return (0);
}



int
scsibussubmatch(parent, match, aux)
	struct device *parent;
	void *match, *aux;
{
	struct cfdata *cf = match;
	struct scsibus_attach_args *sa = aux;
	struct scsi_link *sc_link = sa->sa_sc_link;

	if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != sc_link->target)
		return 0;
	if (cf->cf_loc[1] != -1 && cf->cf_loc[1] != sc_link->lun)
		return 0;
	return ((*cf->cf_attach->ca_match)(parent, match, aux));
}

/*
 * Probe the requested scsi bus. It must be already set up.
 * -1 requests all set up scsi busses.
 * target and lun optionally narrow the search if not -1
 */
int
scsi_probe_busses(bus, target, lun)
	int bus, target, lun;
{

	if (bus == -1) {
		for (bus = 0; bus < scsibus_cd.cd_ndevs; bus++)
			if (scsibus_cd.cd_devs[bus])
				scsi_probe_bus(bus, target, lun);
		return 0;
	} else {
		return scsi_probe_bus(bus, target, lun);
	}
}

/*
 * Probe the requested scsi bus. It must be already set up.
 * target and lun optionally narrow the search if not -1
 */
int
scsi_probe_bus(bus, target, lun)
	int bus, target, lun;
{
	struct scsi_inquiry_data inqbuflun0;
	struct scsibus_softc *scsi;
	u_int16_t scsi_addr;
	int maxtarget, mintarget, maxlun, minlun;

	if (bus < 0 || bus >= scsibus_cd.cd_ndevs)
		return ENXIO;
	scsi = scsibus_cd.cd_devs[bus];
	if (!scsi)
		return ENXIO;

	scsi_addr = scsi->adapter_link->adapter_target;

	if (target == -1) {
		maxtarget = scsi->adapter_link->adapter_buswidth - 1;
		mintarget = 0;
	} else {
		if (target < 0 ||
		    target >= scsi->adapter_link->adapter_buswidth)
			return EINVAL;
		maxtarget = mintarget = target;
	}

	if (lun == -1) {
		maxlun = scsi->adapter_link->luns - 1;
		minlun = 0;
	} else {
		if (lun < 0 || lun >= scsi->adapter_link->luns)
			return EINVAL;
		maxlun = lun;
		if (target == -1 || scsi->sc_link[target][0] == NULL)
			minlun = 0;
		else
			minlun = lun;
	}

	for (target = mintarget; target <= maxtarget; target++)
		if (target != scsi_addr) {
			bzero(&inqbuflun0, sizeof inqbuflun0);
			if (minlun != 0 &&
			    (scsi_inquire(scsi->sc_link[target][0], &inqbuflun0,
			    0) != 0))
				continue;
			for (lun = minlun; lun <= maxlun; lun++)
				if (scsi_probedev(scsi, &inqbuflun0, target,
				    lun) == EINVAL)
					break;
		}

	return 0;
}

void
scsi_strvis(dst, src, len)
	u_char *dst, *src;
	int len;
{
	u_char last;

	/* Trim leading and trailing whitespace and NULs. */
	while (len > 0 && (src[0] == ' ' || src[0] == '\t' || src[0] == '\n' ||
	    src[0] == '\0' || src[0] == 0xff))
		++src, --len;
	while (len > 0 && (src[len-1] == ' ' || src[len-1] == '\t' || 
	    src[len-1] == '\n' || src[len-1] == '\0' || src[len-1] == 0xff))
		--len;

	last = 0xff;
	while (len > 0) {
		switch (*src) {
		case ' ':
		case '\t':
		case '\n':
		case '\0':
		case 0xff:
			/* collapse whitespace and NULs to a single space */
			if (last != ' ')
				*dst++ = ' ';
			last = ' ';
			break;
		case '\\':
			/* quote characters */
			*dst++ = '\\';
			*dst++ = '\\';
			last = '\\';
			break;
		default:
			if (*src < 0x20 || *src >= 0x80) {
				/* non-printable characters */
				*dst++ = '\\';
				*dst++ = ((*src & 0300) >> 6) + '0';
				*dst++ = ((*src & 0070) >> 3) + '0';
				*dst++ = ((*src & 0007) >> 0) + '0';
			} else {
				/* normal characters */
				*dst++ = *src;
			}
			last = *src;
			break;
		}
		++src, --len;
	}

	*dst++ = 0;
}

struct scsi_quirk_inquiry_pattern {
	struct scsi_inquiry_pattern pattern;
	u_int16_t quirks;
};

const struct scsi_quirk_inquiry_pattern scsi_quirk_patterns[] = {
	{{T_CDROM, T_REMOV,
	 "PLEXTOR", "CD-ROM PX-40TS", "1.01"}, SDEV_NOSYNC},

	{{T_DIRECT, T_FIXED,
	 "MICROP  ", "1588-15MBSUN0669", ""},     SDEV_AUTOSAVE},
	{{T_DIRECT, T_FIXED,
	 "DEC     ", "RZ55     (C) DEC", ""},     SDEV_AUTOSAVE},
	{{T_DIRECT, T_FIXED,
	 "EMULEX  ", "MD21/S2     ESDI", "A00"},  SDEV_AUTOSAVE},
	{{T_DIRECT, T_FIXED,
	 "IBMRAID ", "0662S",            ""},     SDEV_AUTOSAVE},
	{{T_DIRECT, T_FIXED,
	 "IBM     ", "0663H",            ""},     SDEV_AUTOSAVE},
	{{T_DIRECT, T_FIXED,
	 "IBM",	  "0664",		 ""},	  SDEV_AUTOSAVE},
	{{T_DIRECT, T_FIXED,
	 "IBM     ", "H3171-S2",         ""},	  SDEV_AUTOSAVE},
	{{T_DIRECT, T_FIXED,
	 "IBM     ", "KZ-C",		 ""},	  SDEV_AUTOSAVE},
	/* Broken IBM disk */
	{{T_DIRECT, T_FIXED,
	 ""	   , "DFRSS2F",		 ""},	  SDEV_AUTOSAVE},
	{{T_DIRECT, T_FIXED,
	 "QUANTUM ", "ELS85S          ", ""},	  SDEV_AUTOSAVE},
	{{T_DIRECT, T_REMOV,
	 "iomega", "jaz 1GB",		 ""},	  SDEV_NOTAGS},
        {{T_DIRECT, T_FIXED,
         "MICROP", "4421-07",		 ""},     SDEV_NOTAGS},
        {{T_DIRECT, T_FIXED,
         "SEAGATE", "ST150176LW",        "0002"}, SDEV_NOTAGS},
        {{T_DIRECT, T_FIXED,
         "HP", "C3725S",		 ""},     SDEV_NOTAGS},
        {{T_DIRECT, T_FIXED,
         "IBM", "DCAS",			 ""},     SDEV_NOTAGS},

	{{T_SEQUENTIAL, T_REMOV,
	 "SONY    ", "SDT-5000        ", "3."},   SDEV_NOSYNC|SDEV_NOWIDE},
	{{T_SEQUENTIAL, T_REMOV,
	 "WangDAT ", "Model 1300      ", "02.4"}, SDEV_NOSYNC|SDEV_NOWIDE},
	{{T_SEQUENTIAL, T_REMOV,
	 "WangDAT ", "Model 2600      ", "01.7"}, SDEV_NOSYNC|SDEV_NOWIDE},
	{{T_SEQUENTIAL, T_REMOV,
	 "WangDAT ", "Model 3200      ", "02.2"}, SDEV_NOSYNC|SDEV_NOWIDE},

	/* ATAPI device quirks */
        {{T_CDROM, T_REMOV,
         "ALPS ELECTRIC CO.,LTD. DC544C", "", "SW03D"}, ADEV_NOTUR},
        {{T_CDROM, T_REMOV,
         "CR-2801TE", "", "1.07"},              ADEV_NOSENSE},
        {{T_CDROM, T_REMOV,
         "CREATIVECD3630E", "", "AC101"},       ADEV_NOSENSE},
        {{T_CDROM, T_REMOV,
         "FX320S", "", "q01"},                  ADEV_NOSENSE},
        {{T_CDROM, T_REMOV,
         "GCD-R580B", "", "1.00"},              ADEV_LITTLETOC},
        {{T_CDROM, T_REMOV,
         "MATSHITA CR-574", "", "1.02"},        ADEV_NOCAPACITY},
        {{T_CDROM, T_REMOV,
         "MATSHITA CR-574", "", "1.06"},        ADEV_NOCAPACITY},
        {{T_CDROM, T_REMOV,
         "Memorex CRW-2642", "", "1.0g"},       ADEV_NOSENSE},
        {{T_CDROM, T_REMOV,
         "NEC                 CD-ROM DRIVE:273", "", "4.21"}, ADEV_NOTUR},
        {{T_CDROM, T_REMOV,
         "SANYO CRD-256P", "", "1.02"},         ADEV_NOCAPACITY},
        {{T_CDROM, T_REMOV,
         "SANYO CRD-254P", "", "1.02"},         ADEV_NOCAPACITY},
        {{T_CDROM, T_REMOV,
         "SANYO CRD-S54P", "", "1.08"},         ADEV_NOCAPACITY},
        {{T_CDROM, T_REMOV,
         "CD-ROM  CDR-S1", "", "1.70"},         ADEV_NOCAPACITY}, /* Sanyo */
        {{T_CDROM, T_REMOV,
         "CD-ROM  CDR-N16", "", "1.25"},        ADEV_NOCAPACITY}, /* Sanyo */
        {{T_CDROM, T_REMOV,
         "UJDCD8730", "", "1.14"},              ADEV_NODOORLOCK}, /* Acer */
};


/*
 * Print out autoconfiguration information for a subdevice.
 *
 * This is a slight abuse of 'standard' autoconfiguration semantics,
 * because 'print' functions don't normally print the colon and
 * device information.  However, in this case that's better than
 * either printing redundant information before the attach message,
 * or having the device driver call a special function to print out
 * the standard device information.
 */
int
scsibusprint(aux, pnp)
	void	*aux;
	const char *pnp;
{
	struct scsibus_attach_args *sa = aux;
	struct scsi_inquiry_data *inqbuf;
	u_int8_t type;
	boolean removable;
	char *dtype, *qtype;
	char vendor[33], product[65], revision[17];
	int target, lun;

	if (pnp != NULL)
		printf("%s", pnp);

	inqbuf = sa->sa_inqbuf;

	target = sa->sa_sc_link->target;
	lun = sa->sa_sc_link->lun;

	type = inqbuf->device & SID_TYPE;
	removable = inqbuf->dev_qual2 & SID_REMOVABLE ? 1 : 0;

	/*
	 * Figure out basic device type and qualifier.
	 */
	dtype = 0;
	switch (inqbuf->device & SID_QUAL) {
	case SID_QUAL_LU_OK:
		qtype = "";
		break;

	case SID_QUAL_LU_OFFLINE:
		qtype = " offline";
		break;

	case SID_QUAL_RSVD:
		panic("scsibusprint: qualifier == SID_QUAL_RSVD");

	case SID_QUAL_BAD_LU:
		panic("scsibusprint: qualifier == SID_QUAL_BAD_LU");

	default:
		qtype = "";
		dtype = "vendor-unique";
		break;
	}
	if (dtype == 0) {
		switch (type) {
		case T_DIRECT:
			dtype = "direct";
			break;
		case T_SEQUENTIAL:
			dtype = "sequential";
			break;
		case T_PRINTER:
			dtype = "printer";
			break;
		case T_PROCESSOR:
			dtype = "processor";
			break;
		case T_CDROM:
			dtype = "cdrom";
			break;
		case T_WORM:
			dtype = "worm";
			break;
		case T_SCANNER:
			dtype = "scanner";
			break;
		case T_OPTICAL:
			dtype = "optical";
			break;
		case T_CHANGER:
			dtype = "changer";
			break;
		case T_COMM:
			dtype = "communication";
			break;
		case T_ENCLOSURE:
			dtype = "enclosure services";
			break;
		case T_RDIRECT:
			dtype = "simplified direct";
			break;
		case T_NODEVICE:
			panic("scsibusprint: device type T_NODEVICE");
		default:
			dtype = "unknown";
			break;
		}
	}

	scsi_strvis(vendor, inqbuf->vendor, 8);
	scsi_strvis(product, inqbuf->product, 16);
	scsi_strvis(revision, inqbuf->revision, 4);

	printf(" targ %d lun %d: <%s, %s, %s> SCSI%d %d/%s %s%s",
	    target, lun, vendor, product, revision,
	    inqbuf->version & SID_ANSII, type, dtype,
	    removable ? "removable" : "fixed", qtype);

	return (UNCONF);
}

/*
 * Given a target and lun, ask the device what it is, and find the correct
 * driver table entry.
 * 
 * Return 0 if further LUNs are possible, EINVAL if not.
 */
int
scsi_probedev(scsi, inqbuflun0, target, lun)
	struct scsibus_softc *scsi;
	struct scsi_inquiry_data *inqbuflun0;
	int target, lun;
{
	struct scsi_link *sc_link;
	static struct scsi_inquiry_data inqbuf;
	const struct scsi_quirk_inquiry_pattern *finger;
	int priority, rslt = 0;
	struct scsibus_attach_args sa;
	struct cfdata *cf;

	/* Skip this slot if it is already attached and try the next LUN. */
	if (scsi->sc_link[target][lun])
		return (0);

	sc_link = malloc(sizeof(*sc_link), M_DEVBUF, M_NOWAIT);
	if (sc_link == NULL)
		return (EINVAL);

	*sc_link = *scsi->adapter_link;
	sc_link->target = target;
	sc_link->lun = lun;
	sc_link->device = &probe_switch;
	sc_link->inquiry_flags = 0;

	SC_DEBUG(sc_link, SDEV_DB2, ("scsi_link created.\n"));

	/*
	 * Tell drivers that are paying attention to avoid sync/wide/tags until
	 * INQUIRY data has been processed and the quirks information is
	 * complete. Some drivers set bits in quirks before we get here, so
	 * just add NOTAGS, NOWIDE and NOSYNC.
	 */
	sc_link->quirks |= SDEV_NOSYNC | SDEV_NOWIDE | SDEV_NOTAGS;

	/*
	 * Ask the device what it is
	 */
#ifdef SCSIDEBUG
	if (((1 << sc_link->scsibus) & scsidebug_buses) &&
	    ((1 << target) & scsidebug_targets) &&
	    ((1 << lun) & scsidebug_luns))
		sc_link->flags |= scsidebug_level;
#endif /* SCSIDEBUG */

#if defined(mvme68k)
	if (lun == 0) {
		/* XXX some drivers depend on this */
		scsi_test_unit_ready(sc_link, TEST_READY_RETRIES_DEFAULT,
		    scsi_autoconf | SCSI_IGNORE_ILLEGAL_REQUEST |
		    SCSI_IGNORE_NOT_READY | SCSI_IGNORE_MEDIA_CHANGE);
	}
#endif

	/* Now go ask the device all about itself. */
	rslt = scsi_inquire(sc_link, &inqbuf, scsi_autoconf | SCSI_SILENT);
	if (rslt != 0) {
		SC_DEBUG(sc_link, SDEV_DB2, ("Bad LUN. rslt = %i\n", rslt));
		if (lun == 0)
			rslt = EINVAL;
		goto bad;
	}

	switch (inqbuf.device & SID_QUAL) {
	case SID_QUAL_RSVD:
	case SID_QUAL_BAD_LU:
	case SID_QUAL_LU_OFFLINE:
		SC_DEBUG(sc_link, SDEV_DB1,
		    ("Bad LUN. SID_QUAL = 0x%02x\n", inqbuf.device & SID_QUAL));
		goto bad;

	case SID_QUAL_LU_OK:
		if ((inqbuf.device & SID_TYPE) == T_NODEVICE) {
			SC_DEBUG(sc_link, SDEV_DB1,
		    	    ("Bad LUN. SID_TYPE = T_NODEVICE\n"));
			goto bad;
		}
		break;

	default:
		break;
	}

	if (lun == 0)
		bcopy(&inqbuf, inqbuflun0, sizeof *inqbuflun0);
	else if (((1 << sc_link->scsibus) & scsiforcelun_buses) &&
	    ((1 << target) & scsiforcelun_targets))
		;
	else if (sc_link->flags & SDEV_UMASS)
		;
	else if (memcmp(&inqbuf, inqbuflun0, sizeof inqbuf) == 0) {
		/* The device doesn't distinguish between LUNs. */
		SC_DEBUG(sc_link, SDEV_DB1, ("IDENTIFY not supported.\n"));
		rslt = EINVAL;
		goto bad;
	}

	finger = (const struct scsi_quirk_inquiry_pattern *)scsi_inqmatch(
	    &inqbuf, scsi_quirk_patterns, 
	    sizeof(scsi_quirk_patterns)/sizeof(scsi_quirk_patterns[0]),
	    sizeof(scsi_quirk_patterns[0]), &priority);

	/*
	 * Based upon the inquiry flags we got back, and if we're
	 * at SCSI-2 or better, remove some limiting quirks.
	 */
	if ((inqbuf.version & SID_ANSII) >= 2) {
		if ((inqbuf.flags & SID_CmdQue) != 0)
			sc_link->quirks &= ~SDEV_NOTAGS;
		if ((inqbuf.flags & SID_Sync) != 0) 
			sc_link->quirks &= ~SDEV_NOSYNC;
		if ((inqbuf.flags & SID_WBus16) != 0)
			sc_link->quirks &= ~SDEV_NOWIDE;
	}
	/*
	 * Now apply any quirks from the table.
	 */
	if (priority != 0)
		sc_link->quirks |= finger->quirks;
	sc_link->scsi_version = inqbuf.version;

	/*
	 * Save INQUIRY "flags" (SID_Linked, etc.) for low-level drivers.
	 */
	sc_link->inquiry_flags = inqbuf.flags;
	memcpy(&sc_link->inqdata, &inqbuf, sizeof(sc_link->inqdata));

	/*
	 * note what BASIC type of device it is
	 */
	if ((inqbuf.dev_qual2 & SID_REMOVABLE) != 0)
		sc_link->flags |= SDEV_REMOVABLE;

	sa.sa_sc_link = sc_link;
	sa.sa_inqbuf = &inqbuf;

	if ((cf = config_search(scsibussubmatch, (struct device *)scsi, &sa)) == 0) {
		scsibusprint(&sa, scsi->sc_dev.dv_xname);
		printf(" not configured\n");
		goto bad;
	}

	/*
	 * Braindead USB devices, especially some x-in-1 media readers, try to
	 * 'help' by pretending any LUN is actually LUN 0 until they see a
	 * different LUN used in a command. So do an INQUIRY on LUN 1 at this
	 * point (since we are done with the data in inqbuf) to prevent such
	 * helpfulness before it causes confusion.
	 */
	if (lun == 0 && (sc_link->flags & SDEV_UMASS) &&
	    scsi->sc_link[target][1] == NULL && sc_link->luns > 1) {
		sc_link->lun = 1;
		scsi_inquire(sc_link, &inqbuf, scsi_autoconf | SCSI_SILENT);
	    	sc_link->lun = 0;
	}

	scsi->sc_link[target][lun] = sc_link;

	/* 
	 * Generate a TEST_UNIT_READY command. This gives drivers waiting for
	 * valid quirks data a chance to set wide/sync/tag options
	 * appropriately. It also clears any outstanding ACA conditions that
	 * INQUIRY may leave behind. 
	 *
	 * Do this now so that any messages generated by config_attach() do not
	 * have negotiation messages inserted into their midst.
	 */
	scsi_test_unit_ready(sc_link, TEST_READY_RETRIES_DEFAULT,
	    scsi_autoconf | SCSI_IGNORE_ILLEGAL_REQUEST |
	    SCSI_IGNORE_NOT_READY | SCSI_IGNORE_MEDIA_CHANGE);

	config_attach((struct device *)scsi, cf, &sa, scsibusprint);

	return (0);

bad:
	free(sc_link, M_DEVBUF);
	return (rslt);
}

/*
 * Return a priority based on how much of the inquiry data matches
 * the patterns for the particular driver.
 */
const void *
scsi_inqmatch(inqbuf, base, nmatches, matchsize, bestpriority)
	struct scsi_inquiry_data *inqbuf;
	const void *base;
	int nmatches, matchsize;
	int *bestpriority;
{
	u_int8_t type;
	boolean removable;
	const void *bestmatch;

	/* Include the qualifier to catch vendor-unique types. */
	type = inqbuf->device;
	removable = inqbuf->dev_qual2 & SID_REMOVABLE ? T_REMOV : T_FIXED;

	for (*bestpriority = 0, bestmatch = 0; nmatches--; base += matchsize) {
		struct scsi_inquiry_pattern *match = (void *)base;
		int priority, len;

		if (type != match->type)
			continue;
		if (removable != match->removable)
			continue;
		priority = 2;
		len = strlen(match->vendor);
		if (bcmp(inqbuf->vendor, match->vendor, len))
			continue;
		priority += len;
		len = strlen(match->product);
		if (bcmp(inqbuf->product, match->product, len))
			continue;
		priority += len;
		len = strlen(match->revision);
		if (bcmp(inqbuf->revision, match->revision, len))
			continue;
		priority += len;

#if SCSIDEBUG
		printf("scsi_inqmatch: %d/%d/%d <%s, %s, %s>\n",
		    priority, match->type, match->removable,
		    match->vendor, match->product, match->revision);
#endif
		if (priority > *bestpriority) {
			*bestpriority = priority;
			bestmatch = base;
		}
	}

	return (bestmatch);
}