xref: /netbsd-src/sys/dev/scsipi/scsiconf.c (revision 1ffa7b76c40339c17a0fb2a09fac93f287cfc046)
1 /*	$NetBSD: scsiconf.c,v 1.204 2003/05/02 12:27:49 fvdl Exp $	*/
2 
3 /*-
4  * Copyright (c) 1998, 1999 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@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@tfs.com) Sept 1992
55  */
56 
57 #include <sys/cdefs.h>
58 __KERNEL_RCSID(0, "$NetBSD: scsiconf.c,v 1.204 2003/05/02 12:27:49 fvdl 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 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 int	scsi_probe_device __P((struct scsibus_softc *, int, int));
96 
97 int	scsibusmatch __P((struct device *, struct cfdata *, void *));
98 void	scsibusattach __P((struct device *, struct device *, void *));
99 int	scsibusactivate __P((struct device *, enum devact));
100 int	scsibusdetach __P((struct device *, int flags));
101 
102 int	scsibussubmatch __P((struct device *, struct cfdata *, void *));
103 
104 CFATTACH_DECL(scsibus, sizeof(struct scsibus_softc),
105     scsibusmatch, scsibusattach, scsibusdetach, scsibusactivate);
106 
107 extern struct cfdriver scsibus_cd;
108 
109 dev_type_open(scsibusopen);
110 dev_type_close(scsibusclose);
111 dev_type_ioctl(scsibusioctl);
112 
113 const struct cdevsw scsibus_cdevsw = {
114 	scsibusopen, scsibusclose, noread, nowrite, scsibusioctl,
115 	nostop, notty, nopoll, nommap, nokqfilter,
116 };
117 
118 int	scsibusprint __P((void *, const char *));
119 void	scsibus_config __P((struct scsipi_channel *, void *));
120 
121 const struct scsipi_bustype scsi_bustype = {
122 	SCSIPI_BUSTYPE_SCSI,
123 	scsi_scsipi_cmd,
124 	scsipi_interpret_sense,
125 	scsi_print_addr,
126 	scsi_kill_pending,
127 };
128 
129 int
130 scsiprint(aux, pnp)
131 	void *aux;
132 	const char *pnp;
133 {
134 	struct scsipi_channel *chan = aux;
135 	struct scsipi_adapter *adapt = chan->chan_adapter;
136 
137 	/* only "scsibus"es can attach to "scsi"s; easy. */
138 	if (pnp)
139 		aprint_normal("scsibus at %s", pnp);
140 
141 	/* don't print channel if the controller says there can be only one. */
142 	if (adapt->adapt_nchannels != 1)
143 		aprint_normal(" channel %d", chan->chan_channel);
144 
145 	return (UNCONF);
146 }
147 
148 int
149 scsibusmatch(parent, cf, aux)
150 	struct device *parent;
151 	struct cfdata *cf;
152 	void *aux;
153 {
154 	struct scsipi_channel *chan = aux;
155 
156 	if (chan->chan_bustype->bustype_type != SCSIPI_BUSTYPE_SCSI)
157 		return 0;
158 
159 	if (cf->cf_loc[SCSICF_CHANNEL] != chan->chan_channel &&
160 	    cf->cf_loc[SCSICF_CHANNEL] != SCSICF_CHANNEL_DEFAULT)
161 		return (0);
162 
163 	return (1);
164 }
165 
166 void
167 scsibusattach(parent, self, aux)
168 	struct device *parent, *self;
169 	void *aux;
170 {
171 	struct scsibus_softc *sc = (void *) self;
172 	struct scsipi_channel *chan = aux;
173 	struct scsi_initq *scsi_initq;
174 
175 	sc->sc_channel = chan;
176 	chan->chan_name = sc->sc_dev.dv_xname;
177 
178 	printf(": %d target%s, %d lun%s per target\n",
179 	    chan->chan_ntargets,
180 	    chan->chan_ntargets == 1 ? "" : "s",
181 	    chan->chan_nluns,
182 	    chan->chan_nluns == 1 ? "" : "s");
183 
184 	/* Initialize the channel structure first */
185 	chan->chan_init_cb = scsibus_config;
186 	chan->chan_init_cb_arg = sc;
187 
188 	scsi_initq = malloc(sizeof(struct scsi_initq), M_DEVBUF, M_WAITOK);
189 	scsi_initq->sc_channel = chan;
190 	TAILQ_INSERT_TAIL(&scsi_initq_head, scsi_initq, scsi_initq);
191         config_pending_incr();
192 	if (scsipi_channel_init(chan)) {
193 		printf(": failed to init channel\n");
194 		return;
195 	}
196 
197 }
198 
199 void
200 scsibus_config(chan, arg)
201 	struct scsipi_channel *chan;
202 	void *arg;
203 {
204 	struct scsibus_softc *sc = arg;
205 	struct scsi_initq *scsi_initq;
206 
207 #ifndef SCSI_DELAY
208 #define SCSI_DELAY 2
209 #endif
210 	if ((chan->chan_flags & SCSIPI_CHAN_NOSETTLE) == 0 &&
211 	    SCSI_DELAY > 0) {
212 		printf("%s: waiting %d seconds for devices to settle...\n",
213 		    sc->sc_dev.dv_xname, SCSI_DELAY);
214 		/* ...an identifier we know no one will use... */
215 		(void) tsleep(scsibus_config, PRIBIO,
216 		    "scsidly", SCSI_DELAY * hz);
217 	}
218 
219 	/* Make sure the devices probe in scsibus order to avoid jitter. */
220 	simple_lock(&scsibus_interlock);
221 	for (;;) {
222 		scsi_initq = TAILQ_FIRST(&scsi_initq_head);
223 		if (scsi_initq->sc_channel == chan)
224 			break;
225 		ltsleep(&scsi_initq_head, PRIBIO, "scsi_initq", 0,
226 		    &scsibus_interlock);
227 	}
228 
229 	simple_unlock(&scsibus_interlock);
230 
231 	scsi_probe_bus(sc, -1, -1);
232 
233 	simple_lock(&scsibus_interlock);
234 	TAILQ_REMOVE(&scsi_initq_head, scsi_initq, scsi_initq);
235 	simple_unlock(&scsibus_interlock);
236 
237 	free(scsi_initq, M_DEVBUF);
238 	wakeup(&scsi_initq_head);
239 
240 	config_pending_decr();
241 }
242 
243 int
244 scsibussubmatch(parent, cf, aux)
245 	struct device *parent;
246 	struct cfdata *cf;
247 	void *aux;
248 {
249 	struct scsipibus_attach_args *sa = aux;
250 	struct scsipi_periph *periph = sa->sa_periph;
251 
252 	if (cf->cf_loc[SCSIBUSCF_TARGET] != SCSIBUSCF_TARGET_DEFAULT &&
253 	    cf->cf_loc[SCSIBUSCF_TARGET] != periph->periph_target)
254 		return (0);
255 	if (cf->cf_loc[SCSIBUSCF_LUN] != SCSIBUSCF_LUN_DEFAULT &&
256 	    cf->cf_loc[SCSIBUSCF_LUN] != periph->periph_lun)
257 		return (0);
258 	return (config_match(parent, cf, aux));
259 }
260 
261 int
262 scsibusactivate(self, act)
263 	struct device *self;
264 	enum devact act;
265 {
266 	struct scsibus_softc *sc = (void *) self;
267 	struct scsipi_channel *chan = sc->sc_channel;
268 	struct scsipi_periph *periph;
269 	int target, lun, error = 0, s;
270 
271 	s = splbio();
272 	switch (act) {
273 	case DVACT_ACTIVATE:
274 		error = EOPNOTSUPP;
275 		break;
276 
277 	case DVACT_DEACTIVATE:
278 		for (target = 0; target < chan->chan_ntargets;
279 		     target++) {
280 			if (target == chan->chan_id)
281 				continue;
282 			for (lun = 0; lun < chan->chan_nluns; lun++) {
283 				periph = scsipi_lookup_periph(chan,
284 				    target, lun);
285 				if (periph == NULL)
286 					continue;
287 				error = config_deactivate(periph->periph_dev);
288 				if (error)
289 					goto out;
290 			}
291 		}
292 		break;
293 	}
294  out:
295 	splx(s);
296 	return (error);
297 }
298 
299 int
300 scsibusdetach(self, flags)
301 	struct device *self;
302 	int flags;
303 {
304 	struct scsibus_softc *sc = (void *) self;
305 	struct scsipi_channel *chan = sc->sc_channel;
306 
307 	/*
308 	 * Shut down the channel.
309 	 */
310 	scsipi_channel_shutdown(chan);
311 
312 	/*
313 	 * Now detach all of the periphs.
314 	 */
315 	return scsipi_target_detach(chan, -1, -1, flags);
316 }
317 
318 /*
319  * Probe the requested scsi bus. It must be already set up.
320  * target and lun optionally narrow the search if not -1
321  */
322 int
323 scsi_probe_bus(sc, target, lun)
324 	struct scsibus_softc *sc;
325 	int target, lun;
326 {
327 	struct scsipi_channel *chan = sc->sc_channel;
328 	int maxtarget, mintarget, maxlun, minlun;
329 	int error;
330 
331 	if (target == -1) {
332 		maxtarget = chan->chan_ntargets - 1;
333 		mintarget = 0;
334 	} else {
335 		if (target < 0 || target >= chan->chan_ntargets)
336 			return (EINVAL);
337 		maxtarget = mintarget = target;
338 	}
339 
340 	if (lun == -1) {
341 		maxlun = chan->chan_nluns - 1;
342 		minlun = 0;
343 	} else {
344 		if (lun < 0 || lun >= chan->chan_nluns)
345 			return (EINVAL);
346 		maxlun = minlun = lun;
347 	}
348 
349 	/*
350 	 * Some HBAs provide an abstracted view of the bus; give them an
351 	 * oppertunity to re-scan it before we do.
352 	 */
353 	if (chan->chan_adapter->adapt_ioctl != NULL)
354 		(*chan->chan_adapter->adapt_ioctl)(chan, SCBUSIOLLSCAN, NULL,
355 		    0, curproc);
356 
357 	if ((error = scsipi_adapter_addref(chan->chan_adapter)) != 0)
358 		return (error);
359 	for (target = mintarget; target <= maxtarget; target++) {
360 		if (target == chan->chan_id)
361 			continue;
362 		for (lun = minlun; lun <= maxlun; lun++) {
363 			/*
364 			 * See if there's a device present, and configure it.
365 			 */
366 			if (scsi_probe_device(sc, target, lun) == 0)
367 				break;
368 			/* otherwise something says we should look further */
369 		}
370 
371 		/*
372 		 * Now that we've discovered all of the LUNs on this
373 		 * I_T Nexus, update the xfer mode for all of them
374 		 * that we know about.
375 		 */
376 		scsipi_set_xfer_mode(chan, target, 1);
377 	}
378 	scsipi_adapter_delref(chan->chan_adapter);
379 	return (0);
380 }
381 
382 /*
383  * Print out autoconfiguration information for a subdevice.
384  *
385  * This is a slight abuse of 'standard' autoconfiguration semantics,
386  * because 'print' functions don't normally print the colon and
387  * device information.  However, in this case that's better than
388  * either printing redundant information before the attach message,
389  * or having the device driver call a special function to print out
390  * the standard device information.
391  */
392 int
393 scsibusprint(aux, pnp)
394 	void *aux;
395 	const char *pnp;
396 {
397 	struct scsipibus_attach_args *sa = aux;
398 	struct scsipi_inquiry_pattern *inqbuf;
399 	u_int8_t type;
400 	const char *dtype;
401 	char vendor[33], product[65], revision[17];
402 	int target, lun;
403 
404 	if (pnp != NULL)
405 		aprint_normal("%s", pnp);
406 
407 	inqbuf = &sa->sa_inqbuf;
408 
409 	target = sa->sa_periph->periph_target;
410 	lun = sa->sa_periph->periph_lun;
411 	type = inqbuf->type & SID_TYPE;
412 
413 	dtype = scsipi_dtype(type);
414 
415 	scsipi_strvis(vendor, 33, inqbuf->vendor, 8);
416 	scsipi_strvis(product, 65, inqbuf->product, 16);
417 	scsipi_strvis(revision, 17, inqbuf->revision, 4);
418 
419 	aprint_normal(" target %d lun %d: <%s, %s, %s> %s %s",
420 	    target, lun, vendor, product, revision, dtype,
421 	    inqbuf->removable ? "removable" : "fixed");
422 
423 	return (UNCONF);
424 }
425 
426 const struct scsi_quirk_inquiry_pattern scsi_quirk_patterns[] = {
427 	{{T_CDROM, T_REMOV,
428 	 "CHINON  ", "CD-ROM CDS-431  ", ""},     PQUIRK_NOLUNS},
429 	{{T_CDROM, T_REMOV,
430 	 "Chinon  ", "CD-ROM CDS-525  ", ""},     PQUIRK_NOLUNS},
431 	{{T_CDROM, T_REMOV,
432 	 "CHINON  ", "CD-ROM CDS-535  ", ""},     PQUIRK_NOLUNS},
433 	{{T_CDROM, T_REMOV,
434 	 "DEC     ", "RRD42   (C) DEC ", ""},     PQUIRK_NOLUNS},
435 	{{T_CDROM, T_REMOV,
436 	 "DENON   ", "DRD-25X         ", "V"},    PQUIRK_NOLUNS},
437 	{{T_CDROM, T_REMOV,
438 	 "GENERIC ", "CRD-BP2         ", ""},     PQUIRK_NOLUNS},
439 	{{T_CDROM, T_REMOV,
440 	 "HP      ", "C4324/C4325     ", ""},     PQUIRK_NOLUNS},
441 	{{T_CDROM, T_REMOV,
442 	 "IMS     ", "CDD521/10       ", "2.06"}, PQUIRK_NOLUNS},
443 	{{T_CDROM, T_REMOV,
444 	 "MATSHITA", "CD-ROM CR-5XX   ", "1.0b"}, PQUIRK_NOLUNS},
445 	{{T_CDROM, T_REMOV,
446 	 "MEDAVIS ", "RENO CD-ROMX2A  ", ""},     PQUIRK_NOLUNS},
447 	{{T_CDROM, T_REMOV,
448 	 "MEDIAVIS", "CDR-H93MV       ", "1.3"},  PQUIRK_NOLUNS},
449 	{{T_CDROM, T_REMOV,
450 	 "NEC     ", "CD-ROM DRIVE:502", ""},     PQUIRK_NOLUNS},
451 	{{T_CDROM, T_REMOV,
452 	 "NEC     ", "CD-ROM DRIVE:55 ", ""},     PQUIRK_NOLUNS},
453 	{{T_CDROM, T_REMOV,
454 	 "NEC     ", "CD-ROM DRIVE:83 ", ""},     PQUIRK_NOLUNS},
455 	{{T_CDROM, T_REMOV,
456 	 "NEC     ", "CD-ROM DRIVE:84 ", ""},     PQUIRK_NOLUNS},
457 	{{T_CDROM, T_REMOV,
458 	 "NEC     ", "CD-ROM DRIVE:841", ""},     PQUIRK_NOLUNS},
459 	{{T_CDROM, T_REMOV,
460 	 "PIONEER ", "CD-ROM DR-124X  ", "1.01"}, PQUIRK_NOLUNS},
461 	{{T_CDROM, T_REMOV,
462 	 "SONY    ", "CD-ROM CDU-541  ", ""},     PQUIRK_NOLUNS},
463 	{{T_CDROM, T_REMOV,
464 	 "SONY    ", "CD-ROM CDU-55S  ", ""},     PQUIRK_NOLUNS},
465 	{{T_CDROM, T_REMOV,
466 	 "SONY    ", "CD-ROM CDU-561  ", ""},     PQUIRK_NOLUNS},
467 	{{T_CDROM, T_REMOV,
468 	 "SONY    ", "CD-ROM CDU-76S", ""},
469 				PQUIRK_NOLUNS|PQUIRK_NOSYNC|PQUIRK_NOWIDE},
470 	{{T_CDROM, T_REMOV,
471 	 "SONY    ", "CD-ROM CDU-8003A", ""},     PQUIRK_NOLUNS},
472 	{{T_CDROM, T_REMOV,
473 	 "SONY    ", "CD-ROM CDU-8012 ", ""},     PQUIRK_NOLUNS},
474 	{{T_CDROM, T_REMOV,
475 	 "TEAC    ", "CD-ROM          ", "1.06"}, PQUIRK_NOLUNS},
476 	{{T_CDROM, T_REMOV,
477 	 "TEAC    ", "CD-ROM CD-56S   ", "1.0B"}, PQUIRK_NOLUNS},
478 	{{T_CDROM, T_REMOV,
479 	 "TEXEL   ", "CD-ROM          ", "1.06"}, PQUIRK_NOLUNS},
480 	{{T_CDROM, T_REMOV,
481 	 "TEXEL   ", "CD-ROM DM-XX24 K", "1.09"}, PQUIRK_NOLUNS},
482 	{{T_CDROM, T_REMOV,
483 	 "TEXEL   ", "CD-ROM DM-XX24 K", "1.10"}, PQUIRK_NOLUNS},
484 	{{T_CDROM, T_REMOV,
485 	 "TOSHIBA ", "XM-4101TASUNSLCD", ""}, PQUIRK_NOLUNS|PQUIRK_NOSYNC},
486 	/* "IBM CDRM00201     !F" 0724 is an IBM OEM Toshiba XM-4101BME */
487 	{{T_CDROM, T_REMOV,
488 	 "IBM     ", "CDRM00201     !F", "0724"}, PQUIRK_NOLUNS|PQUIRK_NOSYNC},
489 	{{T_CDROM, T_REMOV,
490 	 "ShinaKen", "CD-ROM DM-3x1S",   "1.04"}, PQUIRK_NOLUNS},
491 	{{T_CDROM, T_REMOV,
492 	 "JVC     ", "R2626",            ""},     PQUIRK_NOLUNS},
493 	{{T_CDROM, T_REMOV,
494 	 "YAMAHA", "CRW8424S",           ""},     PQUIRK_NOLUNS},
495 	{{T_CDROM, T_REMOV,
496 	 "VMware", "Virtual",            "1.0"},
497 				PQUIRK_NOSTARTUNIT|PQUIRK_NODOORLOCK},
498 	{{T_CDROM, T_REMOV,
499 	 "NEC     ", "CD-ROM DRIVE:222", ""},	  PQUIRK_NOLUNS|PQUIRK_NOSYNC},
500 
501 	{{T_DIRECT, T_FIXED,
502 	 "MICROP  ", "1588-15MBSUN0669", ""},     PQUIRK_AUTOSAVE},
503 	{{T_DIRECT, T_FIXED,
504 	 "MICROP  ", "2217-15MQ1091501", ""},     PQUIRK_NOSYNCCACHE},
505 	{{T_OPTICAL, T_REMOV,
506 	 "EPSON   ", "OMD-5010        ", "3.08"}, PQUIRK_NOLUNS},
507 	{{T_DIRECT, T_FIXED,
508 	 "TOSHIBA ","CD-ROM XM-3401TA",  "0283"}, PQUIRK_CDROM|PQUIRK_NOLUNS},
509 	{{T_DIRECT, T_FIXED,
510 	 "TOSHIBA ", "CD-ROM DRIVE:XM",  "1971"}, PQUIRK_CDROM|PQUIRK_NOLUNS},
511 	{{T_DIRECT, T_FIXED,
512 	 "ADAPTEC ", "AEC-4412BD",       "1.2A"}, PQUIRK_NOMODESENSE},
513 	{{T_DIRECT, T_FIXED,
514 	 "ADAPTEC ", "ACB-4000",         ""},     PQUIRK_FORCELUNS|PQUIRK_AUTOSAVE|PQUIRK_NOMODESENSE},
515 	{{T_DIRECT, T_FIXED,
516 	 "DEC     ", "RZ55     (C) DEC", ""},     PQUIRK_AUTOSAVE},
517 	{{T_DIRECT, T_FIXED,
518 	 "EMULEX  ", "MD21/S2     ESDI", "A00"},
519 				PQUIRK_FORCELUNS|PQUIRK_AUTOSAVE},
520 	/* Gives non-media hardware failure in response to start-unit command */
521 	{{T_DIRECT, T_FIXED,
522 	 "HITACHI", "DK515C",            "CP16"}, PQUIRK_NOSTARTUNIT},
523 	{{T_DIRECT, T_FIXED,
524 	 "HITACHI", "DK515C",            "CP15"}, PQUIRK_NOSTARTUNIT},
525 	{{T_DIRECT, T_FIXED,
526 	/* improperly report DT-only sync mode */
527 	 "HITACHI", "DX32DJ-72ME",	 ""},
528 				PQUIRK_CAP_SYNC|PQUIRK_CAP_WIDE16},
529 	{{T_DIRECT, T_FIXED,
530 	 "MICROP",  "1548-15MZ1077801",  "HZ2P"}, PQUIRK_NOTAG},
531 	{{T_DIRECT, T_FIXED,
532 	 "HP      ", "C372",             ""},     PQUIRK_NOTAG},
533 	{{T_DIRECT, T_FIXED,
534 	 "IBMRAID ", "0662S",		 ""},     PQUIRK_AUTOSAVE},
535 	{{T_DIRECT, T_FIXED,
536 	 "IBM     ", "0663H",		 ""},     PQUIRK_AUTOSAVE},
537 	{{T_DIRECT, T_FIXED,
538 	 "IBM",	     "0664",		 ""},     PQUIRK_AUTOSAVE},
539 	{{T_DIRECT, T_FIXED,
540 	/* improperly report DT-only sync mode */
541 	 "IBM     ", "DXHS36D",		 ""},
542 				PQUIRK_CAP_SYNC|PQUIRK_CAP_WIDE16},
543 	{{T_DIRECT, T_FIXED,
544 	 "IBM     ", "DXHS18Y",		 ""},
545 				PQUIRK_CAP_SYNC|PQUIRK_CAP_WIDE16},
546 	{{T_DIRECT, T_FIXED,
547 	 "IBM     ", "H3171-S2",	 ""},
548 				PQUIRK_NOLUNS|PQUIRK_AUTOSAVE},
549 	{{T_DIRECT, T_FIXED,
550 	 "IBM     ", "KZ-C",		 ""},	  PQUIRK_AUTOSAVE},
551 	/* Broken IBM disk */
552 	{{T_DIRECT, T_FIXED,
553 	 ""	   , "DFRSS2F",		 ""},	  PQUIRK_AUTOSAVE},
554 	{{T_DIRECT, T_REMOV,
555 	 "MPL     ", "MC-DISK-        ", ""},     PQUIRK_NOLUNS},
556 	{{T_DIRECT, T_FIXED,
557 	 "MAXTOR  ", "XT-3280         ", ""},     PQUIRK_NOLUNS},
558 	{{T_DIRECT, T_FIXED,
559 	 "MAXTOR  ", "XT-4380S        ", ""},     PQUIRK_NOLUNS},
560 	{{T_DIRECT, T_FIXED,
561 	 "MAXTOR  ", "MXT-1240S       ", ""},     PQUIRK_NOLUNS},
562 	{{T_DIRECT, T_FIXED,
563 	 "MAXTOR  ", "XT-4170S        ", ""},     PQUIRK_NOLUNS},
564 	{{T_DIRECT, T_FIXED,
565 	 "MAXTOR  ", "XT-8760S",         ""},     PQUIRK_NOLUNS},
566 	{{T_DIRECT, T_FIXED,
567 	 "MAXTOR  ", "LXT-213S        ", ""},     PQUIRK_NOLUNS},
568 	{{T_DIRECT, T_FIXED,
569 	 "MAXTOR  ", "LXT-213S SUN0207", ""},     PQUIRK_NOLUNS},
570 	{{T_DIRECT, T_FIXED,
571 	 "MAXTOR  ", "LXT-200S        ", ""},     PQUIRK_NOLUNS},
572 	{{T_DIRECT, T_FIXED,
573 	 "MEGADRV ", "EV1000",           ""},     PQUIRK_NOMODESENSE},
574 	{{T_DIRECT, T_FIXED,
575 	 "MICROP", "1991-27MZ",          ""},     PQUIRK_NOTAG},
576 	{{T_DIRECT, T_FIXED,
577 	 "MST     ", "SnapLink        ", ""},     PQUIRK_NOLUNS},
578 	{{T_DIRECT, T_FIXED,
579 	 "NEC     ", "D3847           ", "0307"}, PQUIRK_NOLUNS},
580 	{{T_DIRECT, T_FIXED,
581 	 "QUANTUM ", "ELS85S          ", ""},     PQUIRK_AUTOSAVE},
582 	{{T_DIRECT, T_FIXED,
583 	 "QUANTUM ", "LPS525S         ", ""},     PQUIRK_NOLUNS},
584 	{{T_DIRECT, T_FIXED,
585 	 "QUANTUM ", "P105S 910-10-94x", ""},     PQUIRK_NOLUNS},
586 	{{T_DIRECT, T_FIXED,
587 	 "QUANTUM ", "PD1225S         ", ""},     PQUIRK_NOLUNS},
588 	{{T_DIRECT, T_FIXED,
589 	 "QUANTUM ", "PD210S   SUN0207", ""},     PQUIRK_NOLUNS},
590 	{{T_DIRECT, T_FIXED,
591 	 "QUANTUM ", "ATLAS IV 9 WLS", "0A0A"},   PQUIRK_CAP_NODT},
592 	{{T_DIRECT, T_FIXED,
593 	 "RODIME  ", "RO3000S         ", ""},     PQUIRK_NOLUNS},
594 	{{T_DIRECT, T_FIXED,
595 	 "SEAGATE ", "ST125N          ", ""},     PQUIRK_NOLUNS},
596 	{{T_DIRECT, T_FIXED,
597 	 "SEAGATE ", "ST157N          ", ""},     PQUIRK_NOLUNS},
598 	{{T_DIRECT, T_FIXED,
599 	 "SEAGATE ", "ST296           ", ""},     PQUIRK_NOLUNS},
600 	{{T_DIRECT, T_FIXED,
601 	 "SEAGATE ", "ST296N          ", ""},     PQUIRK_NOLUNS},
602 	{{T_DIRECT, T_FIXED,
603 	 "SEAGATE ", "ST318404LC      ", ""},     PQUIRK_NOLUNS},
604 	{{T_DIRECT, T_FIXED,
605 	 "SEAGATE ", "ST15150N        ", ""},     PQUIRK_NOTAG},
606 	{{T_DIRECT, T_FIXED,
607 	 "SEAGATE ", "ST19171",          ""},     PQUIRK_NOMODESENSE},
608 	{{T_DIRECT, T_FIXED,
609 	 "SEAGATE ", "ST32430N",         ""},     PQUIRK_CAP_SYNC},
610 	{{T_DIRECT, T_FIXED,
611 	 "SEAGATE ", "ST34501FC       ", ""},     PQUIRK_NOMODESENSE},
612 	{{T_DIRECT, T_FIXED,
613 	 "TOSHIBA ", "MK538FB         ", "6027"}, PQUIRK_NOLUNS},
614 	{{T_DIRECT, T_FIXED,
615 	 "VMware", "Virtual",           "1.0"},
616 				PQUIRK_NOSTARTUNIT|PQUIRK_NODOORLOCK},
617 	{{T_DIRECT, T_FIXED,	/* XXX move to umass */
618 	 "Maxtor 4", "D080H4",           "DAH0"}, PQUIRK_NOMODESENSE},
619 	{{T_DIRECT, T_FIXED,	/* XXX move to umass */
620 	 "Maxtor 4", "D040H2",           "DAH0"}, PQUIRK_NOMODESENSE},
621 	{{T_DIRECT, T_FIXED,
622 	 "MICROP  ", "1924",          ""},     PQUIRK_CAP_SYNC},
623 	{{T_DIRECT, T_FIXED,
624 	 "FUJITSU ", "M2266",         ""},     PQUIRK_CAP_SYNC},
625 
626 	{{T_DIRECT, T_REMOV,
627 	 "iomega", "jaz 1GB", 		 ""},	  PQUIRK_NOMODESENSE},
628 	{{T_DIRECT, T_REMOV,
629 	 "IOMEGA", "ZIP 100",		 ""},	  PQUIRK_NOMODESENSE},
630 	{{T_DIRECT, T_REMOV,
631 	 "IOMEGA", "ZIP 100",		 "J.03"},
632 				PQUIRK_NOMODESENSE|PQUIRK_NOLUNS},
633 	/* Letting the motor run kills floppy drives and disks quite fast. */
634 	{{T_DIRECT, T_REMOV,
635 	 "TEAC", "FC-1",		 ""},	  PQUIRK_NOSTARTUNIT},
636 	{{T_DIRECT, T_REMOV,
637 	 "INSITE", "I325VM",             ""},
638 				PQUIRK_NOLUNS|PQUIRK_NODOORLOCK},
639 
640 	/* XXX: QIC-36 tape behind Emulex adapter.  Very broken. */
641 	{{T_SEQUENTIAL, T_REMOV,
642 	 "        ", "                ", "    "}, PQUIRK_NOLUNS},
643 	{{T_SEQUENTIAL, T_REMOV,
644 	 "EMULEX  ", "MT-02 QIC       ", ""},     PQUIRK_NOLUNS},
645 	{{T_SEQUENTIAL, T_REMOV,
646 	 "CALIPER ", "CP150           ", ""},     PQUIRK_NOLUNS},
647 	{{T_SEQUENTIAL, T_REMOV,
648 	 "EXABYTE ", "EXB-8200        ", ""},     PQUIRK_NOLUNS},
649 	{{T_SEQUENTIAL, T_REMOV,
650 	 "SONY    ", "GY-10C          ", ""},     PQUIRK_NOLUNS},
651 	{{T_SEQUENTIAL, T_REMOV,
652 	 "SONY    ", "SDT-2000        ", "2.09"}, PQUIRK_NOLUNS},
653 	{{T_SEQUENTIAL, T_REMOV,
654 	 "SONY    ", "SDT-5000        ", "3."},   PQUIRK_NOSYNC|PQUIRK_NOWIDE},
655 	{{T_SEQUENTIAL, T_REMOV,
656 	 "SONY    ", "SDT-5200        ", "3."},   PQUIRK_NOLUNS},
657 	{{T_SEQUENTIAL, T_REMOV,
658 	 "TANDBERG", " TDC 3600       ", ""},     PQUIRK_NOLUNS},
659 	/* Following entry reported as a Tandberg 3600; ref. PR1933 */
660 	{{T_SEQUENTIAL, T_REMOV,
661 	 "ARCHIVE ", "VIPER 150  21247", ""},     PQUIRK_NOLUNS},
662 	/* Following entry for a Cipher ST150S; ref. PR4171 */
663 	{{T_SEQUENTIAL, T_REMOV,
664 	 "ARCHIVE ", "VIPER 1500 21247", "2.2G"}, PQUIRK_NOLUNS},
665 	{{T_SEQUENTIAL, T_REMOV,
666 	 "ARCHIVE ", "Python 28454-XXX", ""},     PQUIRK_NOLUNS},
667 	{{T_SEQUENTIAL, T_REMOV,
668 	 "WANGTEK ", "5099ES SCSI",      ""},     PQUIRK_NOLUNS},
669 	{{T_SEQUENTIAL, T_REMOV,
670 	 "WANGTEK ", "5150ES SCSI",      ""},     PQUIRK_NOLUNS},
671 	{{T_SEQUENTIAL, T_REMOV,
672 	 "WANGTEK ", "SCSI-36",		 ""},     PQUIRK_NOLUNS},
673 	{{T_SEQUENTIAL, T_REMOV,
674 	 "WangDAT ", "Model 1300      ", "02.4"}, PQUIRK_NOSYNC|PQUIRK_NOWIDE},
675 	{{T_SEQUENTIAL, T_REMOV,
676 	 "WangDAT ", "Model 2600      ", "01.7"}, PQUIRK_NOSYNC|PQUIRK_NOWIDE},
677 	{{T_SEQUENTIAL, T_REMOV,
678 	 "WangDAT ", "Model 3200      ", "02.2"}, PQUIRK_NOSYNC|PQUIRK_NOWIDE},
679 	{{T_SEQUENTIAL, T_REMOV,
680 	 "TEAC    ", "MT-2ST/N50      ", ""},     PQUIRK_NOLUNS},
681 
682 	{{T_SCANNER, T_FIXED,
683 	 "RICOH   ", "IS60            ", "1R08"}, PQUIRK_NOLUNS},
684 	{{T_SCANNER, T_FIXED,
685 	 "UMAX    ", "Astra 1200S     ", "V2.9"}, PQUIRK_NOLUNS},
686 	{{T_SCANNER, T_FIXED,
687 	 "UMAX    ", "Astra 1220S     ", ""},     PQUIRK_NOLUNS},
688 	{{T_SCANNER, T_FIXED,
689 	 "UMAX    ", "UMAX S-6E       ", "V2.0"}, PQUIRK_NOLUNS},
690 	{{T_SCANNER, T_FIXED,
691 	 "UMAX    ", "UMAX S-12       ", "V2.1"}, PQUIRK_NOLUNS},
692 	{{T_SCANNER, T_FIXED,
693 	 "ULTIMA  ", "A6000C          ", ""},     PQUIRK_NOLUNS},
694 	{{T_PROCESSOR, T_FIXED,
695 	 "SYMBIOS",  "",                 ""},     PQUIRK_NOLUNS},
696 	{{T_PROCESSOR, T_FIXED,
697 	 "LITRONIC", "PCMCIA          ", ""},     PQUIRK_NOLUNS},
698 	{{T_CHANGER, T_REMOV,
699 	 "SONY    ", "CDL1100         ", ""},     PQUIRK_NOLUNS},
700 	{{T_ENCLOSURE, T_FIXED,
701 	 "SUN     ", "SENA            ", ""},     PQUIRK_NOLUNS},
702 };
703 
704 /*
705  * given a target and lun, ask the device what
706  * it is, and find the correct driver table
707  * entry.
708  */
709 int
710 scsi_probe_device(sc, target, lun)
711 	struct scsibus_softc *sc;
712 	int target, lun;
713 {
714 	struct scsipi_channel *chan = sc->sc_channel;
715 	struct scsipi_periph *periph;
716 	struct scsipi_inquiry_data inqbuf;
717 	struct scsi_quirk_inquiry_pattern *finger;
718 	int checkdtype, priority, docontinue, quirks;
719 	struct scsipibus_attach_args sa;
720 	struct cfdata *cf;
721 
722 	/*
723 	 * Assume no more luns to search after this one.
724 	 * If we successfully get Inquiry data and after
725 	 * merging quirks we find we can probe for more
726 	 * luns, we will.
727 	 */
728 	docontinue = 0;
729 
730 	/* Skip this slot if it is already attached. */
731 	if (scsipi_lookup_periph(chan, target, lun) != NULL)
732 		return (docontinue);
733 
734 	periph = scsipi_alloc_periph(M_NOWAIT);
735 	if (periph == NULL) {
736 #ifdef	DIAGNOSTIC
737 		printf("%s: cannot allocate periph for target %d lun %d\n",
738 		    sc->sc_dev.dv_xname, target, lun);
739 #endif
740 		return (ENOMEM);
741 	}
742 	periph->periph_channel = chan;
743 	periph->periph_switch = &scsi_probe_dev;
744 
745 	periph->periph_target = target;
746 	periph->periph_lun = lun;
747 	periph->periph_quirks = chan->chan_defquirks;
748 
749 #ifdef SCSIPI_DEBUG
750 	if (SCSIPI_DEBUG_TYPE == SCSIPI_BUSTYPE_SCSI &&
751 	    SCSIPI_DEBUG_TARGET == target &&
752 	    SCSIPI_DEBUG_LUN == lun)
753 		periph->periph_dbflags |= SCSIPI_DEBUG_FLAGS;
754 #endif
755 
756 	/*
757 	 * Ask the device what it is
758 	 */
759 	(void) scsipi_test_unit_ready(periph,
760 	    XS_CTL_DISCOVERY | XS_CTL_IGNORE_ILLEGAL_REQUEST |
761 	    XS_CTL_IGNORE_NOT_READY | XS_CTL_IGNORE_MEDIA_CHANGE);
762 
763 #ifdef SCSI_2_DEF
764 	/* some devices need to be told to go to SCSI2 */
765 	/* However some just explode if you tell them this.. leave it out */
766 	scsi_change_def(periph, XS_CTL_DISCOVERY | XS_CTL_SILENT);
767 #endif /* SCSI_2_DEF */
768 
769 	/* Now go ask the device all about itself. */
770 	memset(&inqbuf, 0, sizeof(inqbuf));
771 	if (scsipi_inquire(periph, &inqbuf,
772 	    XS_CTL_DISCOVERY | XS_CTL_DATA_ONSTACK) != 0)
773 		goto bad;
774 	{
775 		u_int8_t *extension = &inqbuf.flags1;
776 		int len = inqbuf.additional_length;
777 		while (len < 3)
778 			extension[len++] = '\0';
779 		while (len < 3 + 28)
780 			extension[len++] = ' ';
781 		while (len < 3 + 28 + 20)
782 			extension[len++] = '\0';
783 		while (len < 3 + 28 + 20 + 1)
784 			extension[len++] = '\0';
785 		while (len < 3 + 28 + 20 + 1 + 1)
786 			extension[len++] = '\0';
787 		while (len < 3 + 28 + 20 + 1 + 1 + (8*2))
788 			extension[len++] = ' ';
789 	}
790 
791 	periph->periph_type = inqbuf.device & SID_TYPE;
792 	if (inqbuf.dev_qual2 & SID_REMOVABLE)
793 		periph->periph_flags |= PERIPH_REMOVABLE;
794 	periph->periph_version = inqbuf.version & SID_ANSII;
795 
796 	/*
797 	 * Any device qualifier that has the top bit set (qualifier&4 != 0)
798 	 * is vendor specific and won't match in this switch.
799 	 * All we do here is throw out bad/negative responses.
800 	 */
801 	checkdtype = 0;
802 	switch (inqbuf.device & SID_QUAL) {
803 	case SID_QUAL_LU_PRESENT:
804 	case SID_QUAL_LU_NOTPRESENT:
805 		checkdtype = 1;
806 		break;
807 
808 	case SID_QUAL_reserved:
809 	case SID_QUAL_LU_NOT_SUPP:
810 		goto bad;
811 
812 	default:
813 		break;
814 	}
815 
816 	/* Let the adapter driver handle the device separatley if it wants. */
817 	if (chan->chan_adapter->adapt_accesschk != NULL &&
818 	    (*chan->chan_adapter->adapt_accesschk)(periph, &sa.sa_inqbuf))
819 		goto bad;
820 
821 	if (checkdtype) {
822 		switch (periph->periph_type) {
823 		case T_DIRECT:
824 		case T_SEQUENTIAL:
825 		case T_PRINTER:
826 		case T_PROCESSOR:
827 		case T_WORM:
828 		case T_CDROM:
829 		case T_SCANNER:
830 		case T_OPTICAL:
831 		case T_CHANGER:
832 		case T_COMM:
833 		case T_IT8_1:
834 		case T_IT8_2:
835 		case T_STORARRAY:
836 		case T_ENCLOSURE:
837 		case T_SIMPLE_DIRECT:
838 		case T_OPTIC_CARD_RW:
839 		case T_OBJECT_STORED:
840 		default:
841 			break;
842 		case T_NODEVICE:
843 			goto bad;
844 		}
845 	}
846 
847 	sa.sa_periph = periph;
848 	sa.sa_inqbuf.type = inqbuf.device;
849 	sa.sa_inqbuf.removable = inqbuf.dev_qual2 & SID_REMOVABLE ?
850 	    T_REMOV : T_FIXED;
851 	sa.sa_inqbuf.vendor = inqbuf.vendor;
852 	sa.sa_inqbuf.product = inqbuf.product;
853 	sa.sa_inqbuf.revision = inqbuf.revision;
854 	sa.scsipi_info.scsi_version = inqbuf.version;
855 	sa.sa_inqptr = &inqbuf;
856 
857 	finger = (struct scsi_quirk_inquiry_pattern *)scsipi_inqmatch(
858 	    &sa.sa_inqbuf, (caddr_t)scsi_quirk_patterns,
859 	    sizeof(scsi_quirk_patterns)/sizeof(scsi_quirk_patterns[0]),
860 	    sizeof(scsi_quirk_patterns[0]), &priority);
861 
862 	if (finger != NULL)
863 		quirks = finger->quirks;
864 	else
865 		quirks = 0;
866 
867 	/*
868 	 * Determine the operating mode capabilities of the device.
869 	 */
870 	if (periph->periph_version >= 2) {
871 		if ((inqbuf.flags3 & SID_CmdQue) != 0 &&
872 		    (quirks & PQUIRK_NOTAG) == 0)
873 			periph->periph_cap |= PERIPH_CAP_TQING;
874 		if ((inqbuf.flags3 & SID_Linked) != 0)
875 			periph->periph_cap |= PERIPH_CAP_LINKCMDS;
876 		if ((inqbuf.flags3 & SID_Sync) != 0 &&
877 		    (quirks & PQUIRK_NOSYNC) == 0)
878 			periph->periph_cap |= PERIPH_CAP_SYNC;
879 		if ((inqbuf.flags3 & SID_WBus16) != 0 &&
880 		    (quirks & PQUIRK_NOWIDE) == 0)
881 			periph->periph_cap |= PERIPH_CAP_WIDE16;
882 		if ((inqbuf.flags3 & SID_WBus32) != 0 &&
883 		    (quirks & PQUIRK_NOWIDE) == 0)
884 			periph->periph_cap |= PERIPH_CAP_WIDE32;
885 		if ((inqbuf.flags3 & SID_SftRe) != 0)
886 			periph->periph_cap |= PERIPH_CAP_SFTRESET;
887 		if ((inqbuf.flags3 & SID_RelAdr) != 0)
888 			periph->periph_cap |= PERIPH_CAP_RELADR;
889 		/* SPC-2 */
890 		if (periph->periph_version >= 3 &&
891 		    !(quirks & PQUIRK_CAP_NODT)){
892 			/*
893 			 * Report ST clocking though CAP_WIDExx/CAP_SYNC.
894 			 * If the device only supports DT, clear these
895 			 * flags (DT implies SYNC and WIDE)
896 			 */
897 			switch (inqbuf.flags4 & SID_Clocking) {
898 			case SID_CLOCKING_DT_ONLY:
899 				periph->periph_cap &=
900 				    ~(PERIPH_CAP_SYNC |
901 				      PERIPH_CAP_WIDE16 |
902 				      PERIPH_CAP_WIDE32);
903 				/* FALLTHOUGH */
904 			case SID_CLOCKING_SD_DT:
905 				periph->periph_cap |= PERIPH_CAP_DT;
906 				break;
907 			default: /* ST only or invalid */
908 				/* nothing to do */
909 				break;
910 			}
911 		}
912 		if (periph->periph_version >= 3) {
913 			if (inqbuf.flags4 & SID_IUS)
914 				periph->periph_cap |= PERIPH_CAP_IUS;
915 			if (inqbuf.flags4 & SID_QAS)
916 				periph->periph_cap |= PERIPH_CAP_QAS;
917 		}
918 	}
919 	if (quirks & PQUIRK_CAP_SYNC)
920 		periph->periph_cap |= PERIPH_CAP_SYNC;
921 	if (quirks & PQUIRK_CAP_WIDE16)
922 		periph->periph_cap |= PERIPH_CAP_WIDE16;
923 
924 	/*
925 	 * Now apply any quirks from the table.
926 	 */
927 	periph->periph_quirks |= quirks;
928 	if (periph->periph_version == 0 &&
929 	    (periph->periph_quirks & PQUIRK_FORCELUNS) == 0)
930 		periph->periph_quirks |= PQUIRK_NOLUNS;
931 
932 	if (periph->periph_quirks & PQUIRK_CDROM) {
933 		periph->periph_quirks ^= PQUIRK_CDROM;
934 		inqbuf.dev_qual2 |= SID_REMOVABLE;
935 		sa.sa_inqbuf.type = inqbuf.device =
936 		    ((inqbuf.device & ~SID_REMOVABLE) | T_CDROM);
937 		sa.sa_inqbuf.removable = T_REMOV;
938 	}
939 
940 	if ((periph->periph_quirks & PQUIRK_NOLUNS) == 0)
941 		docontinue = 1;
942 
943 	if ((cf = config_search(scsibussubmatch, &sc->sc_dev, &sa)) != NULL) {
944 		scsipi_insert_periph(chan, periph);
945 		/*
946 		 * XXX Can't assign periph_dev here, because we'll
947 		 * XXX need it before config_attach() returns.  Must
948 		 * XXX assign it in periph driver.
949 		 */
950 		(void) config_attach(&sc->sc_dev, cf, &sa, scsibusprint);
951 	} else {
952 		scsibusprint(&sa, sc->sc_dev.dv_xname);
953 		printf(" not configured\n");
954 		goto bad;
955 	}
956 
957 	return (docontinue);
958 
959 bad:
960 	free(periph, M_DEVBUF);
961 	return (docontinue);
962 }
963 
964 /****** Entry points for user control of the SCSI bus. ******/
965 
966 int
967 scsibusopen(dev, flag, fmt, p)
968 	dev_t dev;
969 	int flag, fmt;
970 	struct proc *p;
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 int
991 scsibusclose(dev, flag, fmt, p)
992 	dev_t dev;
993 	int flag, fmt;
994 	struct proc *p;
995 {
996 	struct scsibus_softc *sc = scsibus_cd.cd_devs[minor(dev)];
997 
998 	scsipi_adapter_delref(sc->sc_channel->chan_adapter);
999 
1000 	sc->sc_flags &= ~SCSIBUSF_OPEN;
1001 
1002 	return (0);
1003 }
1004 
1005 int
1006 scsibusioctl(dev, cmd, addr, flag, p)
1007 	dev_t dev;
1008 	u_long cmd;
1009 	caddr_t addr;
1010 	int flag;
1011 	struct proc *p;
1012 {
1013 	struct scsibus_softc *sc = scsibus_cd.cd_devs[minor(dev)];
1014 	struct scsipi_channel *chan = sc->sc_channel;
1015 	int error;
1016 
1017 	/*
1018 	 * Enforce write permission for ioctls that change the
1019 	 * state of the bus.  Host adapter specific ioctls must
1020 	 * be checked by the adapter driver.
1021 	 */
1022 	switch (cmd) {
1023 	case SCBUSIOSCAN:
1024 	case SCBUSIODETACH:
1025 	case SCBUSIORESET:
1026 		if ((flag & FWRITE) == 0)
1027 			return (EBADF);
1028 	}
1029 
1030 	switch (cmd) {
1031 	case SCBUSIOSCAN:
1032 	    {
1033 		struct scbusioscan_args *a =
1034 		    (struct scbusioscan_args *)addr;
1035 
1036 		error = scsi_probe_bus(sc, a->sa_target, a->sa_lun);
1037 		break;
1038 	    }
1039 
1040 	case SCBUSIODETACH:
1041 	    {
1042 		struct scbusiodetach_args *a =
1043 		    (struct scbusiodetach_args *)addr;
1044 
1045 		error = scsipi_target_detach(chan, a->sa_target, a->sa_lun, 0);
1046 		break;
1047 	    }
1048 
1049 
1050 	case SCBUSIORESET:
1051 		/* FALLTHROUGH */
1052 	default:
1053 		if (chan->chan_adapter->adapt_ioctl == NULL)
1054 			error = ENOTTY;
1055 		else
1056 			error = (*chan->chan_adapter->adapt_ioctl)(chan,
1057 			    cmd, addr, flag, p);
1058 		break;
1059 	}
1060 
1061 	return (error);
1062 }
1063