xref: /freebsd/sys/cam/scsi/scsi_xpt.c (revision f126890ac5386406dadf7c4cfa9566cbb56537c5)
1 /*-
2  * Implementation of the SCSI Transport
3  *
4  * SPDX-License-Identifier: BSD-2-Clause
5  *
6  * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
7  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
8  * All rights reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions, and the following disclaimer,
15  *    without modification, immediately at the beginning of the file.
16  * 2. The name of the author may not be used to endorse or promote products
17  *    derived from this software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29  * SUCH DAMAGE.
30  */
31 
32 #include <sys/param.h>
33 #include <sys/bus.h>
34 #include <sys/systm.h>
35 #include <sys/types.h>
36 #include <sys/malloc.h>
37 #include <sys/kernel.h>
38 #include <sys/time.h>
39 #include <sys/conf.h>
40 #include <sys/fcntl.h>
41 #include <sys/md5.h>
42 #include <sys/sbuf.h>
43 
44 #include <sys/lock.h>
45 #include <sys/mutex.h>
46 #include <sys/sysctl.h>
47 
48 #include <cam/cam.h>
49 #include <cam/cam_ccb.h>
50 #include <cam/cam_queue.h>
51 #include <cam/cam_periph.h>
52 #include <cam/cam_sim.h>
53 #include <cam/cam_xpt.h>
54 #include <cam/cam_xpt_sim.h>
55 #include <cam/cam_xpt_periph.h>
56 #include <cam/cam_xpt_internal.h>
57 #include <cam/cam_debug.h>
58 
59 #include <cam/scsi/scsi_all.h>
60 #include <cam/scsi/scsi_message.h>
61 #include <cam/scsi/scsi_pass.h>
62 #include <machine/stdarg.h>	/* for xpt_print below */
63 
64 struct scsi_quirk_entry {
65 	struct scsi_inquiry_pattern inq_pat;
66 	uint8_t quirks;
67 #define	CAM_QUIRK_NOLUNS	0x01
68 #define	CAM_QUIRK_NOVPDS	0x02
69 #define	CAM_QUIRK_HILUNS	0x04
70 #define	CAM_QUIRK_NOHILUNS	0x08
71 #define	CAM_QUIRK_NORPTLUNS	0x10
72 	u_int mintags;
73 	u_int maxtags;
74 };
75 #define SCSI_QUIRK(dev)	((struct scsi_quirk_entry *)((dev)->quirk))
76 
77 static int cam_srch_hi = 0;
78 SYSCTL_INT(_kern_cam, OID_AUTO, cam_srch_hi, CTLFLAG_RWTUN,
79     &cam_srch_hi, 0, "Search above LUN 7 for SCSI3 and greater devices");
80 
81 #define	CAM_SCSI2_MAXLUN	8
82 #define	CAM_CAN_GET_SIMPLE_LUN(x, i)				\
83 	((((x)->luns[i].lundata[0] & RPL_LUNDATA_ATYP_MASK) ==	\
84 	RPL_LUNDATA_ATYP_PERIPH) ||				\
85 	(((x)->luns[i].lundata[0] & RPL_LUNDATA_ATYP_MASK) ==	\
86 	RPL_LUNDATA_ATYP_FLAT))
87 #define	CAM_GET_SIMPLE_LUN(lp, i, lval)					\
88 	if (((lp)->luns[(i)].lundata[0] & RPL_LUNDATA_ATYP_MASK) == 	\
89 	    RPL_LUNDATA_ATYP_PERIPH) {					\
90 		(lval) = (lp)->luns[(i)].lundata[1];			\
91 	} else {							\
92 		(lval) = (lp)->luns[(i)].lundata[0];			\
93 		(lval) &= RPL_LUNDATA_FLAT_LUN_MASK;			\
94 		(lval) <<= 8;						\
95 		(lval) |=  (lp)->luns[(i)].lundata[1];			\
96 	}
97 #define	CAM_GET_LUN(lp, i, lval)					\
98 	(lval) = scsi_8btou64((lp)->luns[(i)].lundata);			\
99 	(lval) = CAM_EXTLUN_BYTE_SWIZZLE(lval);
100 
101 /*
102  * If we're not quirked to search <= the first 8 luns
103  * and we are either quirked to search above lun 8,
104  * or we're > SCSI-2 and we've enabled hilun searching,
105  * or we're > SCSI-2 and the last lun was a success,
106  * we can look for luns above lun 8.
107  */
108 #define	CAN_SRCH_HI_SPARSE(dv)					\
109   (((SCSI_QUIRK(dv)->quirks & CAM_QUIRK_NOHILUNS) == 0) 	\
110   && ((SCSI_QUIRK(dv)->quirks & CAM_QUIRK_HILUNS)		\
111   || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2 && cam_srch_hi)))
112 
113 #define	CAN_SRCH_HI_DENSE(dv)					\
114   (((SCSI_QUIRK(dv)->quirks & CAM_QUIRK_NOHILUNS) == 0) 	\
115   && ((SCSI_QUIRK(dv)->quirks & CAM_QUIRK_HILUNS)		\
116   || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2)))
117 
118 static periph_init_t probe_periph_init;
119 
120 static struct periph_driver probe_driver =
121 {
122 	probe_periph_init, "probe",
123 	TAILQ_HEAD_INITIALIZER(probe_driver.units), /* generation */ 0,
124 	CAM_PERIPH_DRV_EARLY
125 };
126 
127 PERIPHDRIVER_DECLARE(probe, probe_driver);
128 
129 typedef enum {
130 	PROBE_TUR,
131 	PROBE_INQUIRY,	/* this counts as DV0 for Basic Domain Validation */
132 	PROBE_FULL_INQUIRY,
133 	PROBE_REPORT_LUNS,
134 	PROBE_MODE_SENSE,
135 	PROBE_SUPPORTED_VPD_LIST,
136 	PROBE_DEVICE_ID,
137 	PROBE_EXTENDED_INQUIRY,
138 	PROBE_SERIAL_NUM,
139 	PROBE_TUR_FOR_NEGOTIATION,
140 	PROBE_INQUIRY_BASIC_DV1,
141 	PROBE_INQUIRY_BASIC_DV2,
142 	PROBE_DV_EXIT,
143 	PROBE_DONE,
144 	PROBE_INVALID
145 } probe_action;
146 
147 static char *probe_action_text[] = {
148 	"PROBE_TUR",
149 	"PROBE_INQUIRY",
150 	"PROBE_FULL_INQUIRY",
151 	"PROBE_REPORT_LUNS",
152 	"PROBE_MODE_SENSE",
153 	"PROBE_SUPPORTED_VPD_LIST",
154 	"PROBE_DEVICE_ID",
155 	"PROBE_EXTENDED_INQUIRY",
156 	"PROBE_SERIAL_NUM",
157 	"PROBE_TUR_FOR_NEGOTIATION",
158 	"PROBE_INQUIRY_BASIC_DV1",
159 	"PROBE_INQUIRY_BASIC_DV2",
160 	"PROBE_DV_EXIT",
161 	"PROBE_DONE",
162 	"PROBE_INVALID"
163 };
164 
165 #define PROBE_SET_ACTION(softc, newaction)	\
166 do {									\
167 	char **text;							\
168 	text = probe_action_text;					\
169 	CAM_DEBUG((softc)->periph->path, CAM_DEBUG_PROBE,		\
170 	    ("Probe %s to %s\n", text[(softc)->action],			\
171 	    text[(newaction)]));					\
172 	(softc)->action = (newaction);					\
173 } while(0)
174 
175 typedef enum {
176 	PROBE_INQUIRY_CKSUM	= 0x01,
177 	PROBE_NO_ANNOUNCE	= 0x04,
178 	PROBE_EXTLUN		= 0x08
179 } probe_flags;
180 
181 typedef struct {
182 	TAILQ_HEAD(, ccb_hdr) request_ccbs;
183 	probe_action	action;
184 	probe_flags	flags;
185 	MD5_CTX		context;
186 	uint8_t	digest[16];
187 	struct cam_periph *periph;
188 } probe_softc;
189 
190 static const char quantum[] = "QUANTUM";
191 static const char sony[] = "SONY";
192 static const char west_digital[] = "WDIGTL";
193 static const char samsung[] = "SAMSUNG";
194 static const char seagate[] = "SEAGATE";
195 static const char microp[] = "MICROP";
196 
197 static struct scsi_quirk_entry scsi_quirk_table[] =
198 {
199 	{
200 		/* Reports QUEUE FULL for temporary resource shortages */
201 		{ T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" },
202 		/*quirks*/0, /*mintags*/24, /*maxtags*/32
203 	},
204 	{
205 		/* Reports QUEUE FULL for temporary resource shortages */
206 		{ T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" },
207 		/*quirks*/0, /*mintags*/24, /*maxtags*/32
208 	},
209 	{
210 		/* Reports QUEUE FULL for temporary resource shortages */
211 		{ T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" },
212 		/*quirks*/0, /*mintags*/24, /*maxtags*/32
213 	},
214 	{
215 		/* Broken tagged queuing drive */
216 		{ T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" },
217 		/*quirks*/0, /*mintags*/0, /*maxtags*/0
218 	},
219 	{
220 		/* Broken tagged queuing drive */
221 		{ T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" },
222 		/*quirks*/0, /*mintags*/0, /*maxtags*/0
223 	},
224 	{
225 		/* Broken tagged queuing drive */
226 		{ T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" },
227 		/*quirks*/0, /*mintags*/0, /*maxtags*/0
228 	},
229 	{
230 		/*
231 		 * Unfortunately, the Quantum Atlas III has the same
232 		 * problem as the Atlas II drives above.
233 		 * Reported by: "Johan Granlund" <johan@granlund.nu>
234 		 *
235 		 * For future reference, the drive with the problem was:
236 		 * QUANTUM QM39100TD-SW N1B0
237 		 *
238 		 * It's possible that Quantum will fix the problem in later
239 		 * firmware revisions.  If that happens, the quirk entry
240 		 * will need to be made specific to the firmware revisions
241 		 * with the problem.
242 		 *
243 		 */
244 		/* Reports QUEUE FULL for temporary resource shortages */
245 		{ T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" },
246 		/*quirks*/0, /*mintags*/24, /*maxtags*/32
247 	},
248 	{
249 		/*
250 		 * 18 Gig Atlas III, same problem as the 9G version.
251 		 * Reported by: Andre Albsmeier
252 		 *		<andre.albsmeier@mchp.siemens.de>
253 		 *
254 		 * For future reference, the drive with the problem was:
255 		 * QUANTUM QM318000TD-S N491
256 		 */
257 		/* Reports QUEUE FULL for temporary resource shortages */
258 		{ T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" },
259 		/*quirks*/0, /*mintags*/24, /*maxtags*/32
260 	},
261 	{
262 		/*
263 		 * Broken tagged queuing drive
264 		 * Reported by: Bret Ford <bford@uop.cs.uop.edu>
265 		 *         and: Martin Renters <martin@tdc.on.ca>
266 		 */
267 		{ T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" },
268 		/*quirks*/0, /*mintags*/0, /*maxtags*/0
269 	},
270 		/*
271 		 * The Seagate Medalist Pro drives have very poor write
272 		 * performance with anything more than 2 tags.
273 		 *
274 		 * Reported by:  Paul van der Zwan <paulz@trantor.xs4all.nl>
275 		 * Drive:  <SEAGATE ST36530N 1444>
276 		 *
277 		 * Reported by:  Jeremy Lea <reg@shale.csir.co.za>
278 		 * Drive:  <SEAGATE ST34520W 1281>
279 		 *
280 		 * No one has actually reported that the 9G version
281 		 * (ST39140*) of the Medalist Pro has the same problem, but
282 		 * we're assuming that it does because the 4G and 6.5G
283 		 * versions of the drive are broken.
284 		 */
285 	{
286 		{ T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"},
287 		/*quirks*/0, /*mintags*/2, /*maxtags*/2
288 	},
289 	{
290 		{ T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"},
291 		/*quirks*/0, /*mintags*/2, /*maxtags*/2
292 	},
293 	{
294 		{ T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"},
295 		/*quirks*/0, /*mintags*/2, /*maxtags*/2
296 	},
297 	{
298 		/*
299 		 * Experiences command timeouts under load with a
300 		 * tag count higher than 55.
301 		 */
302 		{ T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST3146855LW", "*"},
303 		/*quirks*/0, /*mintags*/2, /*maxtags*/55
304 	},
305 	{
306 		/*
307 		 * Slow when tagged queueing is enabled.  Write performance
308 		 * steadily drops off with more and more concurrent
309 		 * transactions.  Best sequential write performance with
310 		 * tagged queueing turned off and write caching turned on.
311 		 *
312 		 * PR:  kern/10398
313 		 * Submitted by:  Hideaki Okada <hokada@isl.melco.co.jp>
314 		 * Drive:  DCAS-34330 w/ "S65A" firmware.
315 		 *
316 		 * The drive with the problem had the "S65A" firmware
317 		 * revision, and has also been reported (by Stephen J.
318 		 * Roznowski <sjr@home.net>) for a drive with the "S61A"
319 		 * firmware revision.
320 		 *
321 		 * Although no one has reported problems with the 2 gig
322 		 * version of the DCAS drive, the assumption is that it
323 		 * has the same problems as the 4 gig version.  Therefore
324 		 * this quirk entries disables tagged queueing for all
325 		 * DCAS drives.
326 		 */
327 		{ T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" },
328 		/*quirks*/0, /*mintags*/0, /*maxtags*/0
329 	},
330 	{
331 		/* Broken tagged queuing drive */
332 		{ T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" },
333 		/*quirks*/0, /*mintags*/0, /*maxtags*/0
334 	},
335 	{
336 		/* Broken tagged queuing drive */
337 		{ T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" },
338 		/*quirks*/0, /*mintags*/0, /*maxtags*/0
339 	},
340 	{
341 		/* This does not support other than LUN 0 */
342 		{ T_DIRECT, SIP_MEDIA_FIXED, "VMware*", "*", "*" },
343 		CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
344 	},
345 	{
346 		/*
347 		 * Broken tagged queuing drive.
348 		 * Submitted by:
349 		 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp>
350 		 * in PR kern/9535
351 		 */
352 		{ T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" },
353 		/*quirks*/0, /*mintags*/0, /*maxtags*/0
354 	},
355         {
356 		/*
357 		 * Slow when tagged queueing is enabled. (1.5MB/sec versus
358 		 * 8MB/sec.)
359 		 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
360 		 * Best performance with these drives is achieved with
361 		 * tagged queueing turned off, and write caching turned on.
362 		 */
363 		{ T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" },
364 		/*quirks*/0, /*mintags*/0, /*maxtags*/0
365         },
366         {
367 		/*
368 		 * Slow when tagged queueing is enabled. (1.5MB/sec versus
369 		 * 8MB/sec.)
370 		 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
371 		 * Best performance with these drives is achieved with
372 		 * tagged queueing turned off, and write caching turned on.
373 		 */
374 		{ T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" },
375 		/*quirks*/0, /*mintags*/0, /*maxtags*/0
376         },
377 	{
378 		/*
379 		 * Doesn't handle queue full condition correctly,
380 		 * so we need to limit maxtags to what the device
381 		 * can handle instead of determining this automatically.
382 		 */
383 		{ T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" },
384 		/*quirks*/0, /*mintags*/2, /*maxtags*/32
385 	},
386 	{
387 		/* Really only one LUN */
388 		{ T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" },
389 		CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
390 	},
391 	{
392 		/* I can't believe we need a quirk for DPT volumes. */
393 		{ T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" },
394 		CAM_QUIRK_NOLUNS,
395 		/*mintags*/0, /*maxtags*/255
396 	},
397 	{
398 		/*
399 		 * Many Sony CDROM drives don't like multi-LUN probing.
400 		 */
401 		{ T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" },
402 		CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
403 	},
404 	{
405 		/*
406 		 * This drive doesn't like multiple LUN probing.
407 		 * Submitted by:  Parag Patel <parag@cgt.com>
408 		 */
409 		{ T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R   CDU9*", "*" },
410 		CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
411 	},
412 	{
413 		{ T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" },
414 		CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
415 	},
416 	{
417 		/*
418 		 * The 8200 doesn't like multi-lun probing, and probably
419 		 * don't like serial number requests either.
420 		 */
421 		{
422 			T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
423 			"EXB-8200*", "*"
424 		},
425 		CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
426 	},
427 	{
428 		/*
429 		 * Let's try the same as above, but for a drive that says
430 		 * it's an IPL-6860 but is actually an EXB 8200.
431 		 */
432 		{
433 			T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
434 			"IPL-6860*", "*"
435 		},
436 		CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
437 	},
438 	{
439 		/*
440 		 * These Hitachi drives don't like multi-lun probing.
441 		 * The PR submitter has a DK319H, but says that the Linux
442 		 * kernel has a similar work-around for the DK312 and DK314,
443 		 * so all DK31* drives are quirked here.
444 		 * PR:            misc/18793
445 		 * Submitted by:  Paul Haddad <paul@pth.com>
446 		 */
447 		{ T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" },
448 		CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
449 	},
450 	{
451 		/*
452 		 * The Hitachi CJ series with J8A8 firmware apparently has
453 		 * problems with tagged commands.
454 		 * PR: 23536
455 		 * Reported by: amagai@nue.org
456 		 */
457 		{ T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK32CJ*", "J8A8" },
458 		CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
459 	},
460 	{
461 		/*
462 		 * These are the large storage arrays.
463 		 * Submitted by:  William Carrel <william.carrel@infospace.com>
464 		 */
465 		{ T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "OPEN*", "*" },
466 		CAM_QUIRK_HILUNS, 2, 1024
467 	},
468 	{
469 		/*
470 		 * This old revision of the TDC3600 is also SCSI-1, and
471 		 * hangs upon serial number probing.
472 		 */
473 		{
474 			T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
475 			" TDC 3600", "U07:"
476 		},
477 		CAM_QUIRK_NOVPDS, /*mintags*/0, /*maxtags*/0
478 	},
479 	{
480 		/*
481 		 * Would repond to all LUNs if asked for.
482 		 */
483 		{
484 			T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER",
485 			"CP150", "*"
486 		},
487 		CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
488 	},
489 	{
490 		/*
491 		 * Would repond to all LUNs if asked for.
492 		 */
493 		{
494 			T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
495 			"96X2*", "*"
496 		},
497 		CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
498 	},
499 	{
500 		/* Submitted by: Matthew Dodd <winter@jurai.net> */
501 		{ T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" },
502 		CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
503 	},
504 	{
505 		/* Submitted by: Matthew Dodd <winter@jurai.net> */
506 		{ T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" },
507 		CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
508 	},
509 	{
510 		/* TeraSolutions special settings for TRC-22 RAID */
511 		{ T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" },
512 		  /*quirks*/0, /*mintags*/55, /*maxtags*/255
513 	},
514 	{
515 		/* Veritas Storage Appliance */
516 		{ T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" },
517 		  CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024
518 	},
519 	{
520 		/*
521 		 * Would respond to all LUNs.  Device type and removable
522 		 * flag are jumper-selectable.
523 		 */
524 		{ T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix",
525 		  "Tahiti 1", "*"
526 		},
527 		CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
528 	},
529 	{
530 		/* EasyRAID E5A aka. areca ARC-6010 */
531 		{ T_DIRECT, SIP_MEDIA_FIXED, "easyRAID", "*", "*" },
532 		  CAM_QUIRK_NOHILUNS, /*mintags*/2, /*maxtags*/255
533 	},
534 	{
535 		{ T_ENCLOSURE, SIP_MEDIA_FIXED, "DP", "BACKPLANE", "*" },
536 		CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
537 	},
538 	{
539 		{ T_DIRECT, SIP_MEDIA_REMOVABLE, "Garmin", "*", "*" },
540 		CAM_QUIRK_NORPTLUNS, /*mintags*/2, /*maxtags*/255
541 	},
542 	{
543 		{ T_DIRECT, SIP_MEDIA_REMOVABLE, "Generic", "STORAGE DEVICE*", "120?" },
544 		CAM_QUIRK_NORPTLUNS, /*mintags*/2, /*maxtags*/255
545 	},
546 	{
547 		{ T_DIRECT, SIP_MEDIA_REMOVABLE, "Generic", "MassStorageClass", "1533" },
548 		CAM_QUIRK_NORPTLUNS, /*mintags*/2, /*maxtags*/255
549 	},
550 	{
551 		/* Default tagged queuing parameters for all devices */
552 		{
553 		  T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED,
554 		  /*vendor*/"*", /*product*/"*", /*revision*/"*"
555 		},
556 		/*quirks*/0, /*mintags*/2, /*maxtags*/255
557 	},
558 };
559 
560 static cam_status	proberegister(struct cam_periph *periph,
561 				      void *arg);
562 static void	 probeschedule(struct cam_periph *probe_periph);
563 static void	 probestart(struct cam_periph *periph, union ccb *start_ccb);
564 static void	 proberequestdefaultnegotiation(struct cam_periph *periph);
565 static int       proberequestbackoff(struct cam_periph *periph,
566 				     struct cam_ed *device);
567 static void	 probedone(struct cam_periph *periph, union ccb *done_ccb);
568 static void	 probe_purge_old(struct cam_path *path,
569 				 struct scsi_report_luns_data *new,
570 				 probe_flags flags);
571 static void	 probecleanup(struct cam_periph *periph);
572 static void	 scsi_find_quirk(struct cam_ed *device);
573 static void	 scsi_scan_bus(struct cam_periph *periph, union ccb *ccb);
574 static void	 scsi_scan_lun(struct cam_periph *periph,
575 			       struct cam_path *path, cam_flags flags,
576 			       union ccb *ccb);
577 static void	 xptscandone(struct cam_periph *periph, union ccb *done_ccb);
578 static struct cam_ed *
579 		 scsi_alloc_device(struct cam_eb *bus, struct cam_et *target,
580 				   lun_id_t lun_id);
581 static void	 scsi_devise_transport(struct cam_path *path);
582 static void	 scsi_set_transfer_settings(struct ccb_trans_settings *cts,
583 					    struct cam_path *path,
584 					    int async_update);
585 static void	 scsi_toggle_tags(struct cam_path *path);
586 static void	 scsi_dev_async(uint32_t async_code,
587 				struct cam_eb *bus,
588 				struct cam_et *target,
589 				struct cam_ed *device,
590 				void *async_arg);
591 static void	 scsi_action(union ccb *start_ccb);
592 static void	 scsi_announce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb);
593 static void	 scsi_proto_announce_sbuf(struct cam_ed *device,
594 					  struct sbuf *sb);
595 static void	 scsi_proto_denounce_sbuf(struct cam_ed *device,
596 					  struct sbuf *sb);
597 static void	 scsi_proto_debug_out(union ccb *ccb);
598 static void	 _scsi_announce_periph(struct cam_periph *, u_int *, u_int *, struct ccb_trans_settings *);
599 
600 static struct xpt_xport_ops scsi_xport_ops = {
601 	.alloc_device = scsi_alloc_device,
602 	.action = scsi_action,
603 	.async = scsi_dev_async,
604 	.announce_sbuf = scsi_announce_periph_sbuf,
605 };
606 #define SCSI_XPT_XPORT(x, X)			\
607 static struct xpt_xport scsi_xport_ ## x = {	\
608 	.xport = XPORT_ ## X,			\
609 	.name = #x,				\
610 	.ops = &scsi_xport_ops,			\
611 };						\
612 CAM_XPT_XPORT(scsi_xport_ ## x);
613 
614 SCSI_XPT_XPORT(spi, SPI);
615 SCSI_XPT_XPORT(sas, SAS);
616 SCSI_XPT_XPORT(fc, FC);
617 SCSI_XPT_XPORT(usb, USB);
618 SCSI_XPT_XPORT(iscsi, ISCSI);
619 SCSI_XPT_XPORT(srp, SRP);
620 SCSI_XPT_XPORT(ppb, PPB);
621 
622 #undef SCSI_XPORT_XPORT
623 
624 static struct xpt_proto_ops scsi_proto_ops = {
625 	.announce_sbuf = scsi_proto_announce_sbuf,
626 	.denounce_sbuf = scsi_proto_denounce_sbuf,
627 	.debug_out = scsi_proto_debug_out,
628 };
629 static struct xpt_proto scsi_proto = {
630 	.proto = PROTO_SCSI,
631 	.name = "scsi",
632 	.ops = &scsi_proto_ops,
633 };
634 CAM_XPT_PROTO(scsi_proto);
635 
636 static void
637 probe_periph_init(void)
638 {
639 }
640 
641 static cam_status
642 proberegister(struct cam_periph *periph, void *arg)
643 {
644 	union ccb *request_ccb;	/* CCB representing the probe request */
645 	probe_softc *softc;
646 
647 	request_ccb = (union ccb *)arg;
648 	if (request_ccb == NULL) {
649 		printf("proberegister: no probe CCB, "
650 		       "can't register device\n");
651 		return(CAM_REQ_CMP_ERR);
652 	}
653 
654 	softc = (probe_softc *)malloc(sizeof(*softc), M_CAMXPT, M_NOWAIT);
655 
656 	if (softc == NULL) {
657 		printf("proberegister: Unable to probe new device. "
658 		       "Unable to allocate softc\n");
659 		return(CAM_REQ_CMP_ERR);
660 	}
661 	TAILQ_INIT(&softc->request_ccbs);
662 	TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
663 			  periph_links.tqe);
664 	softc->flags = 0;
665 	periph->softc = softc;
666 	softc->periph = periph;
667 	softc->action = PROBE_INVALID;
668 	if (cam_periph_acquire(periph) != 0)
669 		return (CAM_REQ_CMP_ERR);
670 
671 	CAM_DEBUG(periph->path, CAM_DEBUG_PROBE, ("Probe started\n"));
672 	scsi_devise_transport(periph->path);
673 
674 	/*
675 	 * Ensure we've waited at least a bus settle
676 	 * delay before attempting to probe the device.
677 	 * For HBAs that don't do bus resets, this won't make a difference.
678 	 */
679 	cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset,
680 				      scsi_delay);
681 	probeschedule(periph);
682 	return(CAM_REQ_CMP);
683 }
684 
685 static void
686 probeschedule(struct cam_periph *periph)
687 {
688 	struct ccb_pathinq cpi;
689 	union ccb *ccb;
690 	probe_softc *softc;
691 
692 	softc = (probe_softc *)periph->softc;
693 	ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
694 
695 	xpt_path_inq(&cpi, periph->path);
696 
697 	/*
698 	 * If a device has gone away and another device, or the same one,
699 	 * is back in the same place, it should have a unit attention
700 	 * condition pending.  It will not report the unit attention in
701 	 * response to an inquiry, which may leave invalid transfer
702 	 * negotiations in effect.  The TUR will reveal the unit attention
703 	 * condition.  Only send the TUR for lun 0, since some devices
704 	 * will get confused by commands other than inquiry to non-existent
705 	 * luns.  If you think a device has gone away start your scan from
706 	 * lun 0.  This will insure that any bogus transfer settings are
707 	 * invalidated.
708 	 *
709 	 * If we haven't seen the device before and the controller supports
710 	 * some kind of transfer negotiation, negotiate with the first
711 	 * sent command if no bus reset was performed at startup.  This
712 	 * ensures that the device is not confused by transfer negotiation
713 	 * settings left over by loader or BIOS action.
714 	 */
715 	if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
716 	 && (ccb->ccb_h.target_lun == 0)) {
717 		PROBE_SET_ACTION(softc, PROBE_TUR);
718 	} else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0
719 	      && (cpi.hba_misc & PIM_NOBUSRESET) != 0) {
720 		proberequestdefaultnegotiation(periph);
721 		PROBE_SET_ACTION(softc, PROBE_INQUIRY);
722 	} else {
723 		PROBE_SET_ACTION(softc, PROBE_INQUIRY);
724 	}
725 
726 	if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE)
727 		softc->flags |= PROBE_NO_ANNOUNCE;
728 	else
729 		softc->flags &= ~PROBE_NO_ANNOUNCE;
730 
731 	if (cpi.hba_misc & PIM_EXTLUNS)
732 		softc->flags |= PROBE_EXTLUN;
733 	else
734 		softc->flags &= ~PROBE_EXTLUN;
735 
736 	xpt_schedule(periph, CAM_PRIORITY_XPT);
737 }
738 
739 static void
740 probestart(struct cam_periph *periph, union ccb *start_ccb)
741 {
742 	/* Probe the device that our peripheral driver points to */
743 	struct ccb_scsiio *csio;
744 	probe_softc *softc;
745 
746 	CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n"));
747 
748 	softc = (probe_softc *)periph->softc;
749 	csio = &start_ccb->csio;
750 again:
751 
752 	switch (softc->action) {
753 	case PROBE_TUR:
754 	case PROBE_TUR_FOR_NEGOTIATION:
755 	case PROBE_DV_EXIT:
756 	{
757 		scsi_test_unit_ready(csio,
758 				     /*retries*/4,
759 				     probedone,
760 				     MSG_SIMPLE_Q_TAG,
761 				     SSD_FULL_SIZE,
762 				     /*timeout*/60000);
763 		break;
764 	}
765 	case PROBE_INQUIRY:
766 	case PROBE_FULL_INQUIRY:
767 	{
768 		u_int inquiry_len;
769 		struct scsi_inquiry_data *inq_buf;
770 
771 		inq_buf = &periph->path->device->inq_data;
772 
773 		/*
774 		 * If the device is currently configured, we calculate an
775 		 * MD5 checksum of the inquiry data, and if the serial number
776 		 * length is greater than 0, add the serial number data
777 		 * into the checksum as well.  Once the inquiry and the
778 		 * serial number check finish, we attempt to figure out
779 		 * whether we still have the same device.
780 		 */
781 		if (periph->path->device->flags & CAM_DEV_UNCONFIGURED) {
782 			softc->flags &= ~PROBE_INQUIRY_CKSUM;
783 		} else if ((softc->flags & PROBE_INQUIRY_CKSUM) == 0) {
784 			MD5Init(&softc->context);
785 			MD5Update(&softc->context, (unsigned char *)inq_buf,
786 				  sizeof(struct scsi_inquiry_data));
787 			if (periph->path->device->serial_num_len > 0) {
788 				MD5Update(&softc->context,
789 					  periph->path->device->serial_num,
790 					  periph->path->device->serial_num_len);
791 			}
792 			MD5Final(softc->digest, &softc->context);
793 			softc->flags |= PROBE_INQUIRY_CKSUM;
794 		}
795 
796 		if (softc->action == PROBE_INQUIRY)
797 			inquiry_len = SHORT_INQUIRY_LENGTH;
798 		else
799 			inquiry_len = SID_ADDITIONAL_LENGTH(inq_buf);
800 
801 		/*
802 		 * Some parallel SCSI devices fail to send an
803 		 * ignore wide residue message when dealing with
804 		 * odd length inquiry requests.  Round up to be
805 		 * safe.
806 		 */
807 		inquiry_len = roundup2(inquiry_len, 2);
808 
809 		scsi_inquiry(csio,
810 			     /*retries*/4,
811 			     probedone,
812 			     MSG_SIMPLE_Q_TAG,
813 			     (uint8_t *)inq_buf,
814 			     inquiry_len,
815 			     /*evpd*/FALSE,
816 			     /*page_code*/0,
817 			     SSD_MIN_SIZE,
818 			     /*timeout*/60 * 1000);
819 		break;
820 	}
821 	case PROBE_REPORT_LUNS:
822 	{
823 		void *rp;
824 
825 		rp = malloc(periph->path->target->rpl_size,
826 		    M_CAMXPT, M_NOWAIT | M_ZERO);
827 		if (rp == NULL) {
828 			struct scsi_inquiry_data *inq_buf;
829 			inq_buf = &periph->path->device->inq_data;
830 			xpt_print(periph->path,
831 			    "Unable to alloc report luns storage\n");
832 			if (INQ_DATA_TQ_ENABLED(inq_buf))
833 				PROBE_SET_ACTION(softc, PROBE_MODE_SENSE);
834 			else
835 				PROBE_SET_ACTION(softc,
836 				    PROBE_SUPPORTED_VPD_LIST);
837 			goto again;
838 		}
839 		scsi_report_luns(csio, 5, probedone, MSG_SIMPLE_Q_TAG,
840 		    RPL_REPORT_DEFAULT, rp, periph->path->target->rpl_size,
841 		    SSD_FULL_SIZE, 60000);
842 		break;
843 	}
844 	case PROBE_MODE_SENSE:
845 	{
846 		void  *mode_buf;
847 		int    mode_buf_len;
848 
849 		mode_buf_len = sizeof(struct scsi_mode_header_6)
850 			     + sizeof(struct scsi_mode_blk_desc)
851 			     + sizeof(struct scsi_control_page);
852 		mode_buf = malloc(mode_buf_len, M_CAMXPT, M_NOWAIT);
853 		if (mode_buf != NULL) {
854 	                scsi_mode_sense(csio,
855 					/*retries*/4,
856 					probedone,
857 					MSG_SIMPLE_Q_TAG,
858 					/*dbd*/FALSE,
859 					SMS_PAGE_CTRL_CURRENT,
860 					SMS_CONTROL_MODE_PAGE,
861 					mode_buf,
862 					mode_buf_len,
863 					SSD_FULL_SIZE,
864 					/*timeout*/60000);
865 			break;
866 		}
867 		xpt_print(periph->path, "Unable to mode sense control page - "
868 		    "malloc failure\n");
869 		PROBE_SET_ACTION(softc, PROBE_SUPPORTED_VPD_LIST);
870 	}
871 	/* FALLTHROUGH */
872 	case PROBE_SUPPORTED_VPD_LIST:
873 	{
874 		struct scsi_vpd_supported_page_list *vpd_list;
875 		struct cam_ed *device;
876 
877 		vpd_list = NULL;
878 		device = periph->path->device;
879 
880 		if ((SCSI_QUIRK(device)->quirks & CAM_QUIRK_NOVPDS) == 0)
881 			vpd_list = malloc(sizeof(*vpd_list), M_CAMXPT,
882 			    M_NOWAIT | M_ZERO);
883 
884 		if (vpd_list != NULL) {
885 			scsi_inquiry(csio,
886 				     /*retries*/4,
887 				     probedone,
888 				     MSG_SIMPLE_Q_TAG,
889 				     (uint8_t *)vpd_list,
890 				     sizeof(*vpd_list),
891 				     /*evpd*/TRUE,
892 				     SVPD_SUPPORTED_PAGE_LIST,
893 				     SSD_MIN_SIZE,
894 				     /*timeout*/60 * 1000);
895 			break;
896 		}
897 done:
898 		/*
899 		 * We'll have to do without, let our probedone
900 		 * routine finish up for us.
901 		 */
902 		start_ccb->csio.data_ptr = NULL;
903 		cam_freeze_devq(periph->path);
904 		cam_periph_doacquire(periph);
905 		probedone(periph, start_ccb);
906 		return;
907 	}
908 	case PROBE_DEVICE_ID:
909 	{
910 		struct scsi_vpd_device_id *devid;
911 
912 		devid = NULL;
913 		if (scsi_vpd_supported_page(periph, SVPD_DEVICE_ID))
914 			devid = malloc(SVPD_DEVICE_ID_MAX_SIZE, M_CAMXPT,
915 			    M_NOWAIT | M_ZERO);
916 
917 		if (devid != NULL) {
918 			scsi_inquiry(csio,
919 				     /*retries*/4,
920 				     probedone,
921 				     MSG_SIMPLE_Q_TAG,
922 				     (uint8_t *)devid,
923 				     SVPD_DEVICE_ID_MAX_SIZE,
924 				     /*evpd*/TRUE,
925 				     SVPD_DEVICE_ID,
926 				     SSD_MIN_SIZE,
927 				     /*timeout*/60 * 1000);
928 			break;
929 		}
930 		goto done;
931 	}
932 	case PROBE_EXTENDED_INQUIRY:
933 	{
934 		struct scsi_vpd_extended_inquiry_data *ext_inq;
935 
936 		ext_inq = NULL;
937 		if (scsi_vpd_supported_page(periph, SVPD_EXTENDED_INQUIRY_DATA))
938 			ext_inq = malloc(sizeof(*ext_inq), M_CAMXPT,
939 			    M_NOWAIT | M_ZERO);
940 
941 		if (ext_inq != NULL) {
942 			scsi_inquiry(csio,
943 				     /*retries*/4,
944 				     probedone,
945 				     MSG_SIMPLE_Q_TAG,
946 				     (uint8_t *)ext_inq,
947 				     sizeof(*ext_inq),
948 				     /*evpd*/TRUE,
949 				     SVPD_EXTENDED_INQUIRY_DATA,
950 				     SSD_MIN_SIZE,
951 				     /*timeout*/60 * 1000);
952 			break;
953 		}
954 		/*
955 		 * We'll have to do without, let our probedone
956 		 * routine finish up for us.
957 		 */
958 		goto done;
959 	}
960 	case PROBE_SERIAL_NUM:
961 	{
962 		struct scsi_vpd_unit_serial_number *serial_buf;
963 		struct cam_ed* device;
964 
965 		serial_buf = NULL;
966 		device = periph->path->device;
967 		if (device->serial_num != NULL) {
968 			free(device->serial_num, M_CAMXPT);
969 			device->serial_num = NULL;
970 			device->serial_num_len = 0;
971 		}
972 
973 		if (scsi_vpd_supported_page(periph, SVPD_UNIT_SERIAL_NUMBER))
974 			serial_buf = (struct scsi_vpd_unit_serial_number *)
975 				malloc(sizeof(*serial_buf), M_CAMXPT,
976 				    M_NOWAIT|M_ZERO);
977 
978 		if (serial_buf != NULL) {
979 			scsi_inquiry(csio,
980 				     /*retries*/4,
981 				     probedone,
982 				     MSG_SIMPLE_Q_TAG,
983 				     (uint8_t *)serial_buf,
984 				     sizeof(*serial_buf),
985 				     /*evpd*/TRUE,
986 				     SVPD_UNIT_SERIAL_NUMBER,
987 				     SSD_MIN_SIZE,
988 				     /*timeout*/60 * 1000);
989 			break;
990 		}
991 		goto done;
992 	}
993 	case PROBE_INQUIRY_BASIC_DV1:
994 	case PROBE_INQUIRY_BASIC_DV2:
995 	{
996 		u_int inquiry_len;
997 		struct scsi_inquiry_data *inq_buf;
998 
999 		inq_buf = &periph->path->device->inq_data;
1000 		inquiry_len = roundup2(SID_ADDITIONAL_LENGTH(inq_buf), 2);
1001 		inq_buf = malloc(inquiry_len, M_CAMXPT, M_NOWAIT);
1002 		if (inq_buf == NULL) {
1003 			xpt_print(periph->path, "malloc failure- skipping Basic"
1004 			    "Domain Validation\n");
1005 			PROBE_SET_ACTION(softc, PROBE_DV_EXIT);
1006 			scsi_test_unit_ready(csio,
1007 					     /*retries*/4,
1008 					     probedone,
1009 					     MSG_SIMPLE_Q_TAG,
1010 					     SSD_FULL_SIZE,
1011 					     /*timeout*/60000);
1012 			break;
1013 		}
1014 
1015 		scsi_inquiry(csio,
1016 			     /*retries*/4,
1017 			     probedone,
1018 			     MSG_SIMPLE_Q_TAG,
1019 			     (uint8_t *)inq_buf,
1020 			     inquiry_len,
1021 			     /*evpd*/FALSE,
1022 			     /*page_code*/0,
1023 			     SSD_MIN_SIZE,
1024 			     /*timeout*/60 * 1000);
1025 		break;
1026 	}
1027 	default:
1028 		panic("probestart: invalid action state 0x%x\n", softc->action);
1029 	}
1030 	start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
1031 	cam_periph_doacquire(periph);
1032 	xpt_action(start_ccb);
1033 }
1034 
1035 static void
1036 proberequestdefaultnegotiation(struct cam_periph *periph)
1037 {
1038 	struct ccb_trans_settings cts;
1039 
1040 	memset(&cts, 0, sizeof(cts));
1041 	xpt_setup_ccb(&cts.ccb_h, periph->path, CAM_PRIORITY_NONE);
1042 	cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1043 	cts.type = CTS_TYPE_USER_SETTINGS;
1044 	xpt_action((union ccb *)&cts);
1045 	if (cam_ccb_status((union ccb *)&cts) != CAM_REQ_CMP) {
1046 		return;
1047 	}
1048 	cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
1049 	cts.type = CTS_TYPE_CURRENT_SETTINGS;
1050 	xpt_action((union ccb *)&cts);
1051 }
1052 
1053 /*
1054  * Backoff Negotiation Code- only pertinent for SPI devices.
1055  */
1056 static int
1057 proberequestbackoff(struct cam_periph *periph, struct cam_ed *device)
1058 {
1059 	struct ccb_trans_settings cts;
1060 	struct ccb_trans_settings_spi *spi;
1061 
1062 	memset(&cts, 0, sizeof (cts));
1063 	xpt_setup_ccb(&cts.ccb_h, periph->path, CAM_PRIORITY_NONE);
1064 	cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1065 	cts.type = CTS_TYPE_CURRENT_SETTINGS;
1066 	xpt_action((union ccb *)&cts);
1067 	if (cam_ccb_status((union ccb *)&cts) != CAM_REQ_CMP) {
1068 		if (bootverbose) {
1069 			xpt_print(periph->path,
1070 			    "failed to get current device settings\n");
1071 		}
1072 		return (0);
1073 	}
1074 	if (cts.transport != XPORT_SPI) {
1075 		if (bootverbose) {
1076 			xpt_print(periph->path, "not SPI transport\n");
1077 		}
1078 		return (0);
1079 	}
1080 	spi = &cts.xport_specific.spi;
1081 
1082 	/*
1083 	 * We cannot renegotiate sync rate if we don't have one.
1084 	 */
1085 	if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) {
1086 		if (bootverbose) {
1087 			xpt_print(periph->path, "no sync rate known\n");
1088 		}
1089 		return (0);
1090 	}
1091 
1092 	/*
1093 	 * We'll assert that we don't have to touch PPR options- the
1094 	 * SIM will see what we do with period and offset and adjust
1095 	 * the PPR options as appropriate.
1096 	 */
1097 
1098 	/*
1099 	 * A sync rate with unknown or zero offset is nonsensical.
1100 	 * A sync period of zero means Async.
1101 	 */
1102 	if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0
1103 	 || spi->sync_offset == 0 || spi->sync_period == 0) {
1104 		if (bootverbose) {
1105 			xpt_print(periph->path, "no sync rate available\n");
1106 		}
1107 		return (0);
1108 	}
1109 
1110 	if (device->flags & CAM_DEV_DV_HIT_BOTTOM) {
1111 		CAM_DEBUG(periph->path, CAM_DEBUG_PROBE,
1112 		    ("hit async: giving up on DV\n"));
1113 		return (0);
1114 	}
1115 
1116 	/*
1117 	 * Jump sync_period up by one, but stop at 5MHz and fall back to Async.
1118 	 * We don't try to remember 'last' settings to see if the SIM actually
1119 	 * gets into the speed we want to set. We check on the SIM telling
1120 	 * us that a requested speed is bad, but otherwise don't try and
1121 	 * check the speed due to the asynchronous and handshake nature
1122 	 * of speed setting.
1123 	 */
1124 	spi->valid = CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_SYNC_OFFSET;
1125 	for (;;) {
1126 		spi->sync_period++;
1127 		if (spi->sync_period >= 0xf) {
1128 			spi->sync_period = 0;
1129 			spi->sync_offset = 0;
1130 			CAM_DEBUG(periph->path, CAM_DEBUG_PROBE,
1131 			    ("setting to async for DV\n"));
1132 			/*
1133 			 * Once we hit async, we don't want to try
1134 			 * any more settings.
1135 			 */
1136 			device->flags |= CAM_DEV_DV_HIT_BOTTOM;
1137 		} else if (bootverbose) {
1138 			CAM_DEBUG(periph->path, CAM_DEBUG_PROBE,
1139 			    ("DV: period 0x%x\n", spi->sync_period));
1140 			printf("setting period to 0x%x\n", spi->sync_period);
1141 		}
1142 		cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
1143 		cts.type = CTS_TYPE_CURRENT_SETTINGS;
1144 		xpt_action((union ccb *)&cts);
1145 		if (cam_ccb_status((union ccb *)&cts) != CAM_REQ_CMP) {
1146 			break;
1147 		}
1148 		CAM_DEBUG(periph->path, CAM_DEBUG_PROBE,
1149 		    ("DV: failed to set period 0x%x\n", spi->sync_period));
1150 		if (spi->sync_period == 0) {
1151 			return (0);
1152 		}
1153 	}
1154 	return (1);
1155 }
1156 
1157 #define CCB_COMPLETED_OK(ccb) (((ccb).status & CAM_STATUS_MASK) == CAM_REQ_CMP)
1158 
1159 static void
1160 probedone(struct cam_periph *periph, union ccb *done_ccb)
1161 {
1162 	probe_softc *softc;
1163 	struct cam_path *path;
1164 	struct scsi_inquiry_data *inq_buf;
1165 	uint32_t  priority;
1166 
1167 	CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n"));
1168 
1169 	softc = (probe_softc *)periph->softc;
1170 	path = done_ccb->ccb_h.path;
1171 	priority = done_ccb->ccb_h.pinfo.priority;
1172 	cam_periph_assert(periph, MA_OWNED);
1173 
1174 	switch (softc->action) {
1175 	case PROBE_TUR:
1176 	{
1177 		if (cam_ccb_status(done_ccb) != CAM_REQ_CMP) {
1178 			if (cam_periph_error(done_ccb, 0, SF_NO_PRINT) ==
1179 			    ERESTART) {
1180 outr:
1181 				/* Drop freeze taken due to CAM_DEV_QFREEZE */
1182 				cam_release_devq(path, 0, 0, 0, FALSE);
1183 				return;
1184 			}
1185 			else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1186 				/* Don't wedge the queue */
1187 				xpt_release_devq(done_ccb->ccb_h.path,
1188 						 /*count*/1,
1189 						 /*run_queue*/TRUE);
1190 		}
1191 		PROBE_SET_ACTION(softc, PROBE_INQUIRY);
1192 		xpt_release_ccb(done_ccb);
1193 		xpt_schedule(periph, priority);
1194 out:
1195 		/* Drop freeze taken due to CAM_DEV_QFREEZE and release. */
1196 		cam_release_devq(path, 0, 0, 0, FALSE);
1197 		cam_periph_release_locked(periph);
1198 		return;
1199 	}
1200 	case PROBE_INQUIRY:
1201 	case PROBE_FULL_INQUIRY:
1202 	{
1203 		if (cam_ccb_status(done_ccb) == CAM_REQ_CMP) {
1204 			uint8_t periph_qual;
1205 
1206 			path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID;
1207 			scsi_find_quirk(path->device);
1208 			inq_buf = &path->device->inq_data;
1209 
1210 			periph_qual = SID_QUAL(inq_buf);
1211 
1212 			if (periph_qual == SID_QUAL_LU_CONNECTED ||
1213 			    periph_qual == SID_QUAL_LU_OFFLINE) {
1214 				/*
1215 				 * We conservatively request only
1216 				 * SHORT_INQUIRY_LEN bytes of inquiry
1217 				 * information during our first try
1218 				 * at sending an INQUIRY. If the device
1219 				 * has more information to give,
1220 				 * perform a second request specifying
1221 				 * the amount of information the device
1222 				 * is willing to give.
1223 				 */
1224 				if (softc->action == PROBE_INQUIRY
1225 				    && SID_ADDITIONAL_LENGTH(inq_buf)
1226 				    > SHORT_INQUIRY_LENGTH) {
1227 					PROBE_SET_ACTION(softc, PROBE_FULL_INQUIRY);
1228 					xpt_release_ccb(done_ccb);
1229 					xpt_schedule(periph, priority);
1230 					goto out;
1231 				}
1232 
1233 				scsi_devise_transport(path);
1234 
1235 				if (path->device->lun_id == 0 &&
1236 				    SID_ANSI_REV(inq_buf) > SCSI_REV_SPC2 &&
1237 				    (SCSI_QUIRK(path->device)->quirks &
1238 				     CAM_QUIRK_NORPTLUNS) == 0) {
1239 					PROBE_SET_ACTION(softc,
1240 					    PROBE_REPORT_LUNS);
1241 					/*
1242 					 * Start with room for *one* lun.
1243 					 */
1244 					periph->path->target->rpl_size = 16;
1245 				} else if (INQ_DATA_TQ_ENABLED(inq_buf))
1246 					PROBE_SET_ACTION(softc,
1247 					    PROBE_MODE_SENSE);
1248 				else
1249 					PROBE_SET_ACTION(softc,
1250 					    PROBE_SUPPORTED_VPD_LIST);
1251 
1252 				if (path->device->flags & CAM_DEV_UNCONFIGURED) {
1253 					path->device->flags &= ~CAM_DEV_UNCONFIGURED;
1254 					xpt_acquire_device(path->device);
1255 				}
1256 				xpt_release_ccb(done_ccb);
1257 				xpt_schedule(periph, priority);
1258 				goto out;
1259 			} else if (path->device->lun_id == 0 &&
1260 			    SID_ANSI_REV(inq_buf) >= SCSI_REV_SPC2 &&
1261 			    (SCSI_QUIRK(path->device)->quirks &
1262 			     CAM_QUIRK_NORPTLUNS) == 0) {
1263 				PROBE_SET_ACTION(softc, PROBE_REPORT_LUNS);
1264 				periph->path->target->rpl_size = 16;
1265 				xpt_release_ccb(done_ccb);
1266 				xpt_schedule(periph, priority);
1267 				goto out;
1268 			}
1269 		} else if (cam_periph_error(done_ccb, 0,
1270 					    done_ccb->ccb_h.target_lun > 0
1271 					    ? SF_RETRY_UA|SF_QUIET_IR
1272 					    : SF_RETRY_UA) == ERESTART) {
1273 			goto outr;
1274 		} else {
1275 			if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1276 				/* Don't wedge the queue */
1277 				xpt_release_devq(done_ccb->ccb_h.path,
1278 				    /*count*/1, /*run_queue*/TRUE);
1279 			}
1280 			path->device->flags &= ~CAM_DEV_INQUIRY_DATA_VALID;
1281 		}
1282 		/*
1283 		 * If we get to this point, we got an error status back
1284 		 * from the inquiry and the error status doesn't require
1285 		 * automatically retrying the command.  Therefore, the
1286 		 * inquiry failed.  If we had inquiry information before
1287 		 * for this device, but this latest inquiry command failed,
1288 		 * the device has probably gone away.  If this device isn't
1289 		 * already marked unconfigured, notify the peripheral
1290 		 * drivers that this device is no more.
1291 		 */
1292 		if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
1293 			/* Send the async notification. */
1294 			xpt_async(AC_LOST_DEVICE, path, NULL);
1295 		PROBE_SET_ACTION(softc, PROBE_INVALID);
1296 
1297 		xpt_release_ccb(done_ccb);
1298 		break;
1299 	}
1300 	case PROBE_REPORT_LUNS:
1301 	{
1302 		struct ccb_scsiio *csio;
1303 		struct scsi_report_luns_data *lp;
1304 		u_int nlun, maxlun;
1305 
1306 		csio = &done_ccb->csio;
1307 
1308 		lp = (struct scsi_report_luns_data *)csio->data_ptr;
1309 		nlun = scsi_4btoul(lp->length) / 8;
1310 		maxlun = (csio->dxfer_len / 8) - 1;
1311 
1312 		if (cam_ccb_status(done_ccb) != CAM_REQ_CMP) {
1313 			if (cam_periph_error(done_ccb, 0,
1314 				done_ccb->ccb_h.target_lun > 0 ?
1315 				SF_RETRY_UA|SF_QUIET_IR : SF_RETRY_UA) ==
1316 			    ERESTART) {
1317 				goto outr;
1318 			}
1319 			if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1320 				xpt_release_devq(done_ccb->ccb_h.path, 1,
1321 				    TRUE);
1322 			}
1323 			free(lp, M_CAMXPT);
1324 			lp = NULL;
1325 		} else if (nlun > maxlun) {
1326 			/*
1327 			 * Reallocate and retry to cover all luns
1328 			 */
1329 			CAM_DEBUG(path, CAM_DEBUG_PROBE,
1330 			    ("Probe: reallocating REPORT_LUNS for %u luns\n",
1331 			     nlun));
1332 			free(lp, M_CAMXPT);
1333 			path->target->rpl_size = (nlun << 3) + 8;
1334 			xpt_release_ccb(done_ccb);
1335 			xpt_schedule(periph, priority);
1336 			goto out;
1337 		} else if (nlun == 0) {
1338 			/*
1339 			 * If there don't appear to be any luns, bail.
1340 			 */
1341 			free(lp, M_CAMXPT);
1342 			lp = NULL;
1343 		} else {
1344 			lun_id_t lun;
1345 			int idx;
1346 
1347 			CAM_DEBUG(path, CAM_DEBUG_PROBE,
1348 			   ("Probe: %u lun(s) reported\n", nlun));
1349 
1350 			CAM_GET_LUN(lp, 0, lun);
1351 			/*
1352 			 * If the first lun is not lun 0, then either there
1353 			 * is no lun 0 in the list, or the list is unsorted.
1354 			 */
1355 			if (lun != 0) {
1356 				for (idx = 0; idx < nlun; idx++) {
1357 					CAM_GET_LUN(lp, idx, lun);
1358 					if (lun == 0) {
1359 						break;
1360 					}
1361 				}
1362 				if (idx != nlun) {
1363 					uint8_t tlun[8];
1364 					memcpy(tlun,
1365 					    lp->luns[0].lundata, 8);
1366 					memcpy(lp->luns[0].lundata,
1367 					    lp->luns[idx].lundata, 8);
1368 					memcpy(lp->luns[idx].lundata,
1369 					    tlun, 8);
1370 					CAM_DEBUG(path, CAM_DEBUG_PROBE,
1371 					    ("lun 0 in position %u\n", idx));
1372 				}
1373 			}
1374 			/*
1375 			 * If we have an old lun list, We can either
1376 			 * retest luns that appear to have been dropped,
1377 			 * or just nuke them.  We'll opt for the latter.
1378 			 * This function will also install the new list
1379 			 * in the target structure.
1380 			 */
1381 			probe_purge_old(path, lp, softc->flags);
1382 			lp = NULL;
1383 		}
1384 		/* The processing above should either exit via a `goto
1385 		 * out` or leave the `lp` variable `NULL` and (if
1386 		 * applicable) `free()` the storage to which it had
1387 		 * pointed. Assert here that is the case.
1388 		 */
1389 		KASSERT(lp == NULL, ("%s: lp is not NULL", __func__));
1390 		inq_buf = &path->device->inq_data;
1391 		if (path->device->flags & CAM_DEV_INQUIRY_DATA_VALID &&
1392 		    (SID_QUAL(inq_buf) == SID_QUAL_LU_CONNECTED ||
1393 		    SID_QUAL(inq_buf) == SID_QUAL_LU_OFFLINE)) {
1394 			if (INQ_DATA_TQ_ENABLED(inq_buf))
1395 				PROBE_SET_ACTION(softc, PROBE_MODE_SENSE);
1396 			else
1397 				PROBE_SET_ACTION(softc,
1398 				    PROBE_SUPPORTED_VPD_LIST);
1399 			xpt_release_ccb(done_ccb);
1400 			xpt_schedule(periph, priority);
1401 			goto out;
1402 		}
1403 		PROBE_SET_ACTION(softc, PROBE_INVALID);
1404 		xpt_release_ccb(done_ccb);
1405 		break;
1406 	}
1407 	case PROBE_MODE_SENSE:
1408 	{
1409 		struct ccb_scsiio *csio;
1410 		struct scsi_mode_header_6 *mode_hdr;
1411 
1412 		csio = &done_ccb->csio;
1413 		mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr;
1414 		if (cam_ccb_status(done_ccb) == CAM_REQ_CMP) {
1415 			struct scsi_control_page *page;
1416 			uint8_t *offset;
1417 
1418 			offset = ((uint8_t *)&mode_hdr[1])
1419 			    + mode_hdr->blk_desc_len;
1420 			page = (struct scsi_control_page *)offset;
1421 			path->device->queue_flags = page->queue_flags;
1422 		} else if (cam_periph_error(done_ccb, 0,
1423 			SF_RETRY_UA|SF_NO_PRINT) == ERESTART) {
1424 			goto outr;
1425 		} else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1426 			/* Don't wedge the queue */
1427 			xpt_release_devq(done_ccb->ccb_h.path,
1428 					 /*count*/1, /*run_queue*/TRUE);
1429 		}
1430 		xpt_release_ccb(done_ccb);
1431 		free(mode_hdr, M_CAMXPT);
1432 		PROBE_SET_ACTION(softc, PROBE_SUPPORTED_VPD_LIST);
1433 		xpt_schedule(periph, priority);
1434 		goto out;
1435 	}
1436 	case PROBE_SUPPORTED_VPD_LIST:
1437 	{
1438 		struct ccb_scsiio *csio;
1439 		struct scsi_vpd_supported_page_list *page_list;
1440 
1441 		csio = &done_ccb->csio;
1442 		page_list =
1443 		    (struct scsi_vpd_supported_page_list *)csio->data_ptr;
1444 
1445 		if (path->device->supported_vpds != NULL) {
1446 			free(path->device->supported_vpds, M_CAMXPT);
1447 			path->device->supported_vpds = NULL;
1448 			path->device->supported_vpds_len = 0;
1449 		}
1450 
1451 		if (page_list == NULL) {
1452 			/*
1453 			 * Don't process the command as it was never sent
1454 			 */
1455 		} else if (CCB_COMPLETED_OK(csio->ccb_h)) {
1456 			/* Got vpd list */
1457 			path->device->supported_vpds_len = page_list->length +
1458 			    SVPD_SUPPORTED_PAGES_HDR_LEN;
1459 			path->device->supported_vpds = (uint8_t *)page_list;
1460 			xpt_release_ccb(done_ccb);
1461 			PROBE_SET_ACTION(softc, PROBE_DEVICE_ID);
1462 			xpt_schedule(periph, priority);
1463 			goto out;
1464 		} else if (cam_periph_error(done_ccb, 0,
1465 			SF_RETRY_UA|SF_NO_PRINT) == ERESTART) {
1466 			goto outr;
1467 		} else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1468 			/* Don't wedge the queue */
1469 			xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
1470 					 /*run_queue*/TRUE);
1471 		}
1472 
1473 		if (page_list)
1474 			free(page_list, M_CAMXPT);
1475 		/* No VPDs available, skip to device check. */
1476 		csio->data_ptr = NULL;
1477 		goto probe_device_check;
1478 	}
1479 	case PROBE_DEVICE_ID:
1480 	{
1481 		struct scsi_vpd_device_id *devid;
1482 		struct ccb_scsiio *csio;
1483 		uint32_t length = 0;
1484 
1485 		csio = &done_ccb->csio;
1486 		devid = (struct scsi_vpd_device_id *)csio->data_ptr;
1487 
1488 		/* Clean up from previous instance of this device */
1489 		if (path->device->device_id != NULL) {
1490 			path->device->device_id_len = 0;
1491 			free(path->device->device_id, M_CAMXPT);
1492 			path->device->device_id = NULL;
1493 		}
1494 
1495 		if (devid == NULL) {
1496 			/* Don't process the command as it was never sent */
1497 		} else if (CCB_COMPLETED_OK(csio->ccb_h)) {
1498 			length = scsi_2btoul(devid->length);
1499 			if (length != 0) {
1500 				/*
1501 				 * NB: device_id_len is actual response
1502 				 * size, not buffer size.
1503 				 */
1504 				path->device->device_id_len = length +
1505 				    SVPD_DEVICE_ID_HDR_LEN;
1506 				path->device->device_id = (uint8_t *)devid;
1507 			}
1508 		} else if (cam_periph_error(done_ccb, 0,
1509 			SF_RETRY_UA) == ERESTART) {
1510 			goto outr;
1511 		} else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1512 			/* Don't wedge the queue */
1513 			xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
1514 					 /*run_queue*/TRUE);
1515 		}
1516 
1517 		/* Free the device id space if we don't use it */
1518 		if (devid && length == 0)
1519 			free(devid, M_CAMXPT);
1520 		xpt_release_ccb(done_ccb);
1521 		PROBE_SET_ACTION(softc, PROBE_EXTENDED_INQUIRY);
1522 		xpt_schedule(periph, priority);
1523 		goto out;
1524 	}
1525 	case PROBE_EXTENDED_INQUIRY: {
1526 		struct scsi_vpd_extended_inquiry_data *ext_inq;
1527 		struct ccb_scsiio *csio;
1528 		int32_t length = 0;
1529 
1530 		csio = &done_ccb->csio;
1531 		ext_inq = (struct scsi_vpd_extended_inquiry_data *)
1532 		    csio->data_ptr;
1533 		if (path->device->ext_inq != NULL) {
1534 			path->device->ext_inq_len = 0;
1535 			free(path->device->ext_inq, M_CAMXPT);
1536 			path->device->ext_inq = NULL;
1537 		}
1538 
1539 		if (ext_inq == NULL) {
1540 			/* Don't process the command as it was never sent */
1541 		} else if (CCB_COMPLETED_OK(csio->ccb_h)) {
1542 			length = scsi_2btoul(ext_inq->page_length) +
1543 			    __offsetof(struct scsi_vpd_extended_inquiry_data,
1544 			    flags1);
1545 			length = min(length, sizeof(*ext_inq));
1546 			length -= csio->resid;
1547 			if (length > 0) {
1548 				path->device->ext_inq_len = length;
1549 				path->device->ext_inq = (uint8_t *)ext_inq;
1550 			}
1551 		} else if (cam_periph_error(done_ccb, 0, SF_RETRY_UA) ==
1552 		    ERESTART) {
1553 			goto outr;
1554 		} else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1555 			/* Don't wedge the queue */
1556 			xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
1557 					 /*run_queue*/TRUE);
1558 		}
1559 
1560 		/* Free the device id space if we don't use it */
1561 		if (ext_inq && length <= 0)
1562 			free(ext_inq, M_CAMXPT);
1563 		xpt_release_ccb(done_ccb);
1564 		PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM);
1565 		xpt_schedule(periph, priority);
1566 		goto out;
1567 	}
1568 
1569 probe_device_check:
1570 	case PROBE_SERIAL_NUM:
1571 	{
1572 		struct ccb_scsiio *csio;
1573 		struct scsi_vpd_unit_serial_number *serial_buf;
1574 		uint32_t  priority;
1575 		int changed;
1576 		int have_serialnum;
1577 
1578 		changed = 1;
1579 		have_serialnum = 0;
1580 		csio = &done_ccb->csio;
1581 		priority = done_ccb->ccb_h.pinfo.priority;
1582 		serial_buf =
1583 		    (struct scsi_vpd_unit_serial_number *)csio->data_ptr;
1584 
1585 		if (serial_buf == NULL) {
1586 			/*
1587 			 * Don't process the command as it was never sent
1588 			 */
1589 		} else if (cam_ccb_status(done_ccb) == CAM_REQ_CMP
1590 			&& (serial_buf->length > 0)) {
1591 			have_serialnum = 1;
1592 			path->device->serial_num =
1593 				(uint8_t *)malloc((serial_buf->length + 1),
1594 						   M_CAMXPT, M_NOWAIT);
1595 			if (path->device->serial_num != NULL) {
1596 				int start, slen;
1597 
1598 				start = strspn(serial_buf->serial_num, " ");
1599 				slen = serial_buf->length - start;
1600 				if (slen <= 0) {
1601 					/*
1602 					 * SPC5r05 says that an all-space serial
1603 					 * number means no product serial number
1604 					 * is available
1605 					 */
1606 					slen = 0;
1607 				}
1608 				/*
1609 				 * In apparent violation of the spec, some
1610 				 * devices pad their serial numbers with
1611 				 * trailing spaces. Remove them.
1612 				 */
1613 				while (slen > 0 &&
1614 				    serial_buf->serial_num[start + slen - 1] == ' ')
1615 					slen--;
1616 				memcpy(path->device->serial_num,
1617 				       &serial_buf->serial_num[start], slen);
1618 				path->device->serial_num_len = slen;
1619 				path->device->serial_num[slen] = '\0';
1620 			}
1621 		} else if (cam_periph_error(done_ccb, 0,
1622 			SF_RETRY_UA|SF_NO_PRINT) == ERESTART) {
1623 			goto outr;
1624 		} else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1625 			/* Don't wedge the queue */
1626 			xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
1627 					 /*run_queue*/TRUE);
1628 		}
1629 
1630 		/*
1631 		 * Let's see if we have seen this device before.
1632 		 */
1633 		if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) {
1634 			MD5_CTX context;
1635 			uint8_t digest[16];
1636 
1637 			MD5Init(&context);
1638 
1639 			MD5Update(&context,
1640 				  (unsigned char *)&path->device->inq_data,
1641 				  sizeof(struct scsi_inquiry_data));
1642 
1643 			if (have_serialnum)
1644 				MD5Update(&context, path->device->serial_num,
1645 					  path->device->serial_num_len);
1646 
1647 			MD5Final(digest, &context);
1648 			if (bcmp(softc->digest, digest, 16) == 0)
1649 				changed = 0;
1650 
1651 			/*
1652 			 * XXX Do we need to do a TUR in order to ensure
1653 			 *     that the device really hasn't changed???
1654 			 */
1655 			if ((changed != 0)
1656 			 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0))
1657 				xpt_async(AC_LOST_DEVICE, path, NULL);
1658 		}
1659 		if (serial_buf != NULL)
1660 			free(serial_buf, M_CAMXPT);
1661 
1662 		if (changed != 0) {
1663 			/*
1664 			 * Now that we have all the necessary
1665 			 * information to safely perform transfer
1666 			 * negotiations... Controllers don't perform
1667 			 * any negotiation or tagged queuing until
1668 			 * after the first XPT_SET_TRAN_SETTINGS ccb is
1669 			 * received.  So, on a new device, just retrieve
1670 			 * the user settings, and set them as the current
1671 			 * settings to set the device up.
1672 			 */
1673 			proberequestdefaultnegotiation(periph);
1674 			xpt_release_ccb(done_ccb);
1675 
1676 			/*
1677 			 * Perform a TUR to allow the controller to
1678 			 * perform any necessary transfer negotiation.
1679 			 */
1680 			PROBE_SET_ACTION(softc, PROBE_TUR_FOR_NEGOTIATION);
1681 			xpt_schedule(periph, priority);
1682 			goto out;
1683 		}
1684 		xpt_release_ccb(done_ccb);
1685 		break;
1686 	}
1687 	case PROBE_TUR_FOR_NEGOTIATION:
1688 	case PROBE_DV_EXIT:
1689 		if (cam_ccb_status(done_ccb) != CAM_REQ_CMP) {
1690 			if (cam_periph_error(done_ccb, 0, SF_NO_PRINT |
1691 			    SF_NO_RECOVERY | SF_NO_RETRY) == ERESTART)
1692 				goto outr;
1693 		}
1694 		if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1695 			/* Don't wedge the queue */
1696 			xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
1697 					 /*run_queue*/TRUE);
1698 		}
1699 		/*
1700 		 * Do Domain Validation for lun 0 on devices that claim
1701 		 * to support Synchronous Transfer modes.
1702 		 */
1703 	 	if (softc->action == PROBE_TUR_FOR_NEGOTIATION
1704 		 && done_ccb->ccb_h.target_lun == 0
1705 		 && (path->device->inq_data.flags & SID_Sync) != 0
1706                  && (path->device->flags & CAM_DEV_IN_DV) == 0) {
1707 			CAM_DEBUG(periph->path, CAM_DEBUG_PROBE,
1708 			    ("Begin Domain Validation\n"));
1709 			path->device->flags |= CAM_DEV_IN_DV;
1710 			xpt_release_ccb(done_ccb);
1711 			PROBE_SET_ACTION(softc, PROBE_INQUIRY_BASIC_DV1);
1712 			xpt_schedule(periph, priority);
1713 			goto out;
1714 		}
1715 		if (softc->action == PROBE_DV_EXIT) {
1716 			CAM_DEBUG(periph->path, CAM_DEBUG_PROBE,
1717 			    ("Leave Domain Validation\n"));
1718 		}
1719 		if (path->device->flags & CAM_DEV_UNCONFIGURED) {
1720 			path->device->flags &= ~CAM_DEV_UNCONFIGURED;
1721 			xpt_acquire_device(path->device);
1722 		}
1723 		path->device->flags &=
1724 		    ~(CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM);
1725 		if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) {
1726 			/* Inform the XPT that a new device has been found */
1727 			done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
1728 			xpt_action(done_ccb);
1729 			xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path,
1730 				  done_ccb);
1731 		}
1732 		PROBE_SET_ACTION(softc, PROBE_DONE);
1733 		xpt_release_ccb(done_ccb);
1734 		break;
1735 	case PROBE_INQUIRY_BASIC_DV1:
1736 	case PROBE_INQUIRY_BASIC_DV2:
1737 	{
1738 		struct scsi_inquiry_data *nbuf;
1739 		struct ccb_scsiio *csio;
1740 
1741 		if (cam_ccb_status(done_ccb) != CAM_REQ_CMP) {
1742 			if (cam_periph_error(done_ccb, 0, SF_NO_PRINT |
1743 			    SF_NO_RECOVERY | SF_NO_RETRY) == ERESTART)
1744 				goto outr;
1745 		}
1746 		if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1747 			/* Don't wedge the queue */
1748 			xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
1749 					 /*run_queue*/TRUE);
1750 		}
1751 		csio = &done_ccb->csio;
1752 		nbuf = (struct scsi_inquiry_data *)csio->data_ptr;
1753 		if (bcmp(nbuf, &path->device->inq_data, SHORT_INQUIRY_LENGTH)) {
1754 			xpt_print(path,
1755 			    "inquiry data fails comparison at DV%d step\n",
1756 			    softc->action == PROBE_INQUIRY_BASIC_DV1 ? 1 : 2);
1757 			if (proberequestbackoff(periph, path->device)) {
1758 				path->device->flags &= ~CAM_DEV_IN_DV;
1759 				PROBE_SET_ACTION(softc, PROBE_TUR_FOR_NEGOTIATION);
1760 			} else {
1761 				/* give up */
1762 				PROBE_SET_ACTION(softc, PROBE_DV_EXIT);
1763 			}
1764 			free(nbuf, M_CAMXPT);
1765 			xpt_release_ccb(done_ccb);
1766 			xpt_schedule(periph, priority);
1767 			goto out;
1768 		}
1769 		free(nbuf, M_CAMXPT);
1770 		if (softc->action == PROBE_INQUIRY_BASIC_DV1) {
1771 			PROBE_SET_ACTION(softc, PROBE_INQUIRY_BASIC_DV2);
1772 			xpt_release_ccb(done_ccb);
1773 			xpt_schedule(periph, priority);
1774 			goto out;
1775 		}
1776 		if (softc->action == PROBE_INQUIRY_BASIC_DV2) {
1777 			CAM_DEBUG(periph->path, CAM_DEBUG_PROBE,
1778 			    ("Leave Domain Validation Successfully\n"));
1779 		}
1780 		if (path->device->flags & CAM_DEV_UNCONFIGURED) {
1781 			path->device->flags &= ~CAM_DEV_UNCONFIGURED;
1782 			xpt_acquire_device(path->device);
1783 		}
1784 		path->device->flags &=
1785 		    ~(CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM);
1786 		if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) {
1787 			/* Inform the XPT that a new device has been found */
1788 			done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
1789 			xpt_action(done_ccb);
1790 			xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path,
1791 				  done_ccb);
1792 		}
1793 		PROBE_SET_ACTION(softc, PROBE_DONE);
1794 		xpt_release_ccb(done_ccb);
1795 		break;
1796 	}
1797 	default:
1798 		panic("probedone: invalid action state 0x%x\n", softc->action);
1799 	}
1800 	done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
1801 	TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe);
1802 	done_ccb->ccb_h.status = CAM_REQ_CMP;
1803 	xpt_done(done_ccb);
1804 	if (TAILQ_FIRST(&softc->request_ccbs) == NULL) {
1805 		CAM_DEBUG(periph->path, CAM_DEBUG_PROBE, ("Probe completed\n"));
1806 		/* Drop freeze taken due to CAM_DEV_QFREEZE flag set. */
1807 		cam_release_devq(path, 0, 0, 0, FALSE);
1808 		cam_periph_release_locked(periph);
1809 		cam_periph_invalidate(periph);
1810 		cam_periph_release_locked(periph);
1811 	} else {
1812 		probeschedule(periph);
1813 		goto out;
1814 	}
1815 }
1816 
1817 static void
1818 probe_purge_old(struct cam_path *path, struct scsi_report_luns_data *new,
1819     probe_flags flags)
1820 {
1821 	struct cam_path *tp;
1822 	struct scsi_report_luns_data *old;
1823 	u_int idx1, idx2, nlun_old, nlun_new;
1824 	lun_id_t this_lun;
1825 	uint8_t *ol, *nl;
1826 
1827 	if (path->target == NULL) {
1828 		return;
1829 	}
1830 	mtx_lock(&path->target->luns_mtx);
1831 	old = path->target->luns;
1832 	path->target->luns = new;
1833 	mtx_unlock(&path->target->luns_mtx);
1834 	if (old == NULL)
1835 		return;
1836 	nlun_old = scsi_4btoul(old->length) / 8;
1837 	nlun_new = scsi_4btoul(new->length) / 8;
1838 
1839 	/*
1840 	 * We are not going to assume sorted lists. Deal.
1841 	 */
1842 	for (idx1 = 0; idx1 < nlun_old; idx1++) {
1843 		ol = old->luns[idx1].lundata;
1844 		for (idx2 = 0; idx2 < nlun_new; idx2++) {
1845 			nl = new->luns[idx2].lundata;
1846 			if (memcmp(nl, ol, 8) == 0) {
1847 				break;
1848 			}
1849 		}
1850 		if (idx2 < nlun_new) {
1851 			continue;
1852 		}
1853 		/*
1854 		 * An 'old' item not in the 'new' list.
1855 		 * Nuke it. Except that if it is lun 0,
1856 		 * that would be what the probe state
1857 		 * machine is currently working on,
1858 		 * so we won't do that.
1859 		 */
1860 		CAM_GET_LUN(old, idx1, this_lun);
1861 		if (this_lun == 0) {
1862 			continue;
1863 		}
1864 
1865 		/*
1866 		 * We also cannot nuke it if it is
1867 		 * not in a lun format we understand
1868 		 * and replace the LUN with a "simple" LUN
1869 		 * if that is all the HBA supports.
1870 		 */
1871 		if (!(flags & PROBE_EXTLUN)) {
1872 			if (!CAM_CAN_GET_SIMPLE_LUN(old, idx1))
1873 				continue;
1874 			CAM_GET_SIMPLE_LUN(old, idx1, this_lun);
1875 		}
1876 
1877 		if (xpt_create_path(&tp, NULL, xpt_path_path_id(path),
1878 		    xpt_path_target_id(path), this_lun) == CAM_REQ_CMP) {
1879 			xpt_async(AC_LOST_DEVICE, tp, NULL);
1880 			xpt_free_path(tp);
1881 		}
1882 	}
1883 	free(old, M_CAMXPT);
1884 }
1885 
1886 static void
1887 probecleanup(struct cam_periph *periph)
1888 {
1889 	free(periph->softc, M_CAMXPT);
1890 }
1891 
1892 static void
1893 scsi_find_quirk(struct cam_ed *device)
1894 {
1895 	struct scsi_quirk_entry *quirk;
1896 	caddr_t	match;
1897 
1898 	match = cam_quirkmatch((caddr_t)&device->inq_data,
1899 			       (caddr_t)scsi_quirk_table,
1900 			       nitems(scsi_quirk_table),
1901 			       sizeof(*scsi_quirk_table), scsi_inquiry_match);
1902 
1903 	if (match == NULL)
1904 		panic("xpt_find_quirk: device didn't match wildcard entry!!");
1905 
1906 	quirk = (struct scsi_quirk_entry *)match;
1907 	device->quirk = quirk;
1908 	device->mintags = quirk->mintags;
1909 	device->maxtags = quirk->maxtags;
1910 }
1911 
1912 typedef struct {
1913 	union	ccb *request_ccb;
1914 	struct 	ccb_pathinq *cpi;
1915 	int	counter;
1916 	int	lunindex[0];
1917 } scsi_scan_bus_info;
1918 
1919 /*
1920  * To start a scan, request_ccb is an XPT_SCAN_BUS ccb.
1921  * As the scan progresses, scsi_scan_bus is used as the
1922  * callback on completion function.
1923  */
1924 static void
1925 scsi_scan_bus(struct cam_periph *periph, union ccb *request_ccb)
1926 {
1927 	struct mtx *mtx;
1928 
1929 	CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
1930 		  ("scsi_scan_bus\n"));
1931 	switch (request_ccb->ccb_h.func_code) {
1932 	case XPT_SCAN_BUS:
1933 	case XPT_SCAN_TGT:
1934 	{
1935 		scsi_scan_bus_info *scan_info;
1936 		union	ccb *work_ccb, *reset_ccb;
1937 		struct	cam_path *path;
1938 		u_int	i;
1939 		u_int	low_target, max_target;
1940 		u_int	initiator_id;
1941 
1942 		/* Find out the characteristics of the bus */
1943 		work_ccb = xpt_alloc_ccb_nowait();
1944 		if (work_ccb == NULL) {
1945 			request_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
1946 			xpt_done(request_ccb);
1947 			return;
1948 		}
1949 		xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path,
1950 			      request_ccb->ccb_h.pinfo.priority);
1951 		work_ccb->ccb_h.func_code = XPT_PATH_INQ;
1952 		xpt_action(work_ccb);
1953 		if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
1954 			request_ccb->ccb_h.status = work_ccb->ccb_h.status;
1955 			xpt_free_ccb(work_ccb);
1956 			xpt_done(request_ccb);
1957 			return;
1958 		}
1959 
1960 		if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) {
1961 			/*
1962 			 * Can't scan the bus on an adapter that
1963 			 * cannot perform the initiator role.
1964 			 */
1965 			request_ccb->ccb_h.status = CAM_REQ_CMP;
1966 			xpt_free_ccb(work_ccb);
1967 			xpt_done(request_ccb);
1968 			return;
1969 		}
1970 
1971 		/* We may need to reset bus first, if we haven't done it yet. */
1972 		if ((work_ccb->cpi.hba_inquiry &
1973 		    (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) &&
1974 		    !(work_ccb->cpi.hba_misc & PIM_NOBUSRESET) &&
1975 		    !timevalisset(&request_ccb->ccb_h.path->bus->last_reset) &&
1976 		    (reset_ccb = xpt_alloc_ccb_nowait()) != NULL) {
1977 			xpt_setup_ccb(&reset_ccb->ccb_h, request_ccb->ccb_h.path,
1978 			      CAM_PRIORITY_NONE);
1979 			reset_ccb->ccb_h.func_code = XPT_RESET_BUS;
1980 			xpt_action(reset_ccb);
1981 			if (reset_ccb->ccb_h.status != CAM_REQ_CMP) {
1982 				request_ccb->ccb_h.status = reset_ccb->ccb_h.status;
1983 				xpt_free_ccb(reset_ccb);
1984 				xpt_free_ccb(work_ccb);
1985 				xpt_done(request_ccb);
1986 				return;
1987 			}
1988 			xpt_free_ccb(reset_ccb);
1989 		}
1990 
1991 		/* Save some state for use while we probe for devices */
1992 		scan_info = (scsi_scan_bus_info *) malloc(sizeof(scsi_scan_bus_info) +
1993 		    (work_ccb->cpi.max_target * sizeof (u_int)), M_CAMXPT, M_ZERO|M_NOWAIT);
1994 		if (scan_info == NULL) {
1995 			request_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
1996 			xpt_free_ccb(work_ccb);
1997 			xpt_done(request_ccb);
1998 			return;
1999 		}
2000 		CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2001 		   ("SCAN start for %p\n", scan_info));
2002 		scan_info->request_ccb = request_ccb;
2003 		scan_info->cpi = &work_ccb->cpi;
2004 
2005 		/* Cache on our stack so we can work asynchronously */
2006 		max_target = scan_info->cpi->max_target;
2007 		low_target = 0;
2008 		initiator_id = scan_info->cpi->initiator_id;
2009 
2010 		/*
2011 		 * We can scan all targets in parallel, or do it sequentially.
2012 		 */
2013 
2014 		if (request_ccb->ccb_h.func_code == XPT_SCAN_TGT) {
2015 			max_target = low_target = request_ccb->ccb_h.target_id;
2016 			scan_info->counter = 0;
2017 		} else if (scan_info->cpi->hba_misc & PIM_SEQSCAN) {
2018 			max_target = 0;
2019 			scan_info->counter = 0;
2020 		} else {
2021 			scan_info->counter = scan_info->cpi->max_target + 1;
2022 			if (scan_info->cpi->initiator_id < scan_info->counter) {
2023 				scan_info->counter--;
2024 			}
2025 		}
2026 		mtx = xpt_path_mtx(scan_info->request_ccb->ccb_h.path);
2027 		mtx_unlock(mtx);
2028 
2029 		for (i = low_target; i <= max_target; i++) {
2030 			cam_status status;
2031 			if (i == initiator_id)
2032 				continue;
2033 
2034 			status = xpt_create_path(&path, NULL,
2035 						 request_ccb->ccb_h.path_id,
2036 						 i, 0);
2037 			if (status != CAM_REQ_CMP) {
2038 				printf("scsi_scan_bus: xpt_create_path failed"
2039 				       " with status %#x, bus scan halted\n",
2040 				       status);
2041 				free(scan_info, M_CAMXPT);
2042 				request_ccb->ccb_h.status = status;
2043 				xpt_free_ccb(work_ccb);
2044 				xpt_done(request_ccb);
2045 				break;
2046 			}
2047 			work_ccb = xpt_alloc_ccb_nowait();
2048 			if (work_ccb == NULL) {
2049 				xpt_free_ccb((union ccb *)scan_info->cpi);
2050 				free(scan_info, M_CAMXPT);
2051 				xpt_free_path(path);
2052 				request_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
2053 				xpt_done(request_ccb);
2054 				break;
2055 			}
2056 			xpt_setup_ccb(&work_ccb->ccb_h, path,
2057 				      request_ccb->ccb_h.pinfo.priority);
2058 			work_ccb->ccb_h.func_code = XPT_SCAN_LUN;
2059 			work_ccb->ccb_h.cbfcnp = scsi_scan_bus;
2060 			work_ccb->ccb_h.flags |= CAM_UNLOCKED;
2061 			work_ccb->ccb_h.ppriv_ptr0 = scan_info;
2062 			work_ccb->crcn.flags = request_ccb->crcn.flags;
2063 			xpt_action(work_ccb);
2064 		}
2065 
2066 		mtx_lock(mtx);
2067 		break;
2068 	}
2069 	case XPT_SCAN_LUN:
2070 	{
2071 		cam_status status;
2072 		struct cam_path *path, *oldpath;
2073 		scsi_scan_bus_info *scan_info;
2074 		struct cam_et *target;
2075 		struct cam_ed *device, *nextdev;
2076 		int next_target;
2077 		path_id_t path_id;
2078 		target_id_t target_id;
2079 		lun_id_t lun_id;
2080 
2081 		oldpath = request_ccb->ccb_h.path;
2082 
2083 		status = cam_ccb_status(request_ccb);
2084 		scan_info = (scsi_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0;
2085 		path_id = request_ccb->ccb_h.path_id;
2086 		target_id = request_ccb->ccb_h.target_id;
2087 		lun_id = request_ccb->ccb_h.target_lun;
2088 		target = request_ccb->ccb_h.path->target;
2089 		next_target = 1;
2090 
2091 		mtx = xpt_path_mtx(scan_info->request_ccb->ccb_h.path);
2092 		mtx_lock(mtx);
2093 		mtx_lock(&target->luns_mtx);
2094 		if (target->luns) {
2095 			lun_id_t first;
2096 			u_int nluns = scsi_4btoul(target->luns->length) / 8;
2097 
2098 			/*
2099 			 * Make sure we skip over lun 0 if it's the first member
2100 			 * of the list as we've actually just finished probing
2101 			 * it.
2102 			 */
2103 			CAM_GET_LUN(target->luns, 0, first);
2104 			if (first == 0 && scan_info->lunindex[target_id] == 0) {
2105 				scan_info->lunindex[target_id]++;
2106 			}
2107 
2108 			/*
2109 			 * Skip any LUNs that the HBA can't deal with.
2110 			 */
2111 			while (scan_info->lunindex[target_id] < nluns) {
2112 				if (scan_info->cpi->hba_misc & PIM_EXTLUNS) {
2113 					CAM_GET_LUN(target->luns,
2114 					    scan_info->lunindex[target_id],
2115 					    lun_id);
2116 					break;
2117 				}
2118 
2119 				if (CAM_CAN_GET_SIMPLE_LUN(target->luns,
2120 				    scan_info->lunindex[target_id])) {
2121 					CAM_GET_SIMPLE_LUN(target->luns,
2122 					    scan_info->lunindex[target_id],
2123 					    lun_id);
2124 					break;
2125 				}
2126 
2127 				scan_info->lunindex[target_id]++;
2128 			}
2129 
2130 			if (scan_info->lunindex[target_id] < nluns) {
2131 				mtx_unlock(&target->luns_mtx);
2132 				next_target = 0;
2133 				CAM_DEBUG(request_ccb->ccb_h.path,
2134 				    CAM_DEBUG_PROBE,
2135 				   ("next lun to try at index %u is %jx\n",
2136 				   scan_info->lunindex[target_id],
2137 				   (uintmax_t)lun_id));
2138 				scan_info->lunindex[target_id]++;
2139 			} else {
2140 				mtx_unlock(&target->luns_mtx);
2141 				/* We're done with scanning all luns. */
2142 			}
2143 		} else {
2144 			mtx_unlock(&target->luns_mtx);
2145 			device = request_ccb->ccb_h.path->device;
2146 			/* Continue sequential LUN scan if: */
2147 			/*  -- we have more LUNs that need recheck */
2148 			mtx_lock(&target->bus->eb_mtx);
2149 			nextdev = device;
2150 			while ((nextdev = TAILQ_NEXT(nextdev, links)) != NULL)
2151 				if ((nextdev->flags & CAM_DEV_UNCONFIGURED) == 0)
2152 					break;
2153 			mtx_unlock(&target->bus->eb_mtx);
2154 			if (nextdev != NULL) {
2155 				next_target = 0;
2156 			/*  -- stop if CAM_QUIRK_NOLUNS is set. */
2157 			} else if (SCSI_QUIRK(device)->quirks & CAM_QUIRK_NOLUNS) {
2158 				next_target = 1;
2159 			/*  -- this LUN is connected and its SCSI version
2160 			 *     allows more LUNs. */
2161 			} else if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) {
2162 				if (lun_id < (CAM_SCSI2_MAXLUN-1) ||
2163 				    CAN_SRCH_HI_DENSE(device))
2164 					next_target = 0;
2165 			/*  -- this LUN is disconnected, its SCSI version
2166 			 *     allows more LUNs and we guess they may be. */
2167 			} else if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) {
2168 				if (lun_id < (CAM_SCSI2_MAXLUN-1) ||
2169 				    CAN_SRCH_HI_SPARSE(device))
2170 					next_target = 0;
2171 			}
2172 			if (next_target == 0) {
2173 				lun_id++;
2174 				if (lun_id > scan_info->cpi->max_lun)
2175 					next_target = 1;
2176 			}
2177 		}
2178 
2179 		/*
2180 		 * Check to see if we scan any further luns.
2181 		 */
2182 		if (next_target) {
2183 			int done;
2184 
2185 			/*
2186 			 * Free the current request path- we're done with it.
2187 			 */
2188 			xpt_free_path(oldpath);
2189  hop_again:
2190 			done = 0;
2191 			if (scan_info->request_ccb->ccb_h.func_code == XPT_SCAN_TGT) {
2192 				done = 1;
2193 			} else if (scan_info->cpi->hba_misc & PIM_SEQSCAN) {
2194 				scan_info->counter++;
2195 				if (scan_info->counter ==
2196 				    scan_info->cpi->initiator_id) {
2197 					scan_info->counter++;
2198 				}
2199 				if (scan_info->counter >=
2200 				    scan_info->cpi->max_target+1) {
2201 					done = 1;
2202 				}
2203 			} else {
2204 				scan_info->counter--;
2205 				if (scan_info->counter == 0) {
2206 					done = 1;
2207 				}
2208 			}
2209 			if (done) {
2210 				mtx_unlock(mtx);
2211 				xpt_free_ccb(request_ccb);
2212 				xpt_free_ccb((union ccb *)scan_info->cpi);
2213 				request_ccb = scan_info->request_ccb;
2214 				CAM_DEBUG(request_ccb->ccb_h.path,
2215 				    CAM_DEBUG_TRACE,
2216 				   ("SCAN done for %p\n", scan_info));
2217 				free(scan_info, M_CAMXPT);
2218 				request_ccb->ccb_h.status = CAM_REQ_CMP;
2219 				xpt_done(request_ccb);
2220 				break;
2221 			}
2222 
2223 			if ((scan_info->cpi->hba_misc & PIM_SEQSCAN) == 0) {
2224 				mtx_unlock(mtx);
2225 				xpt_free_ccb(request_ccb);
2226 				break;
2227 			}
2228 			status = xpt_create_path(&path, NULL,
2229 			    scan_info->request_ccb->ccb_h.path_id,
2230 			    scan_info->counter, 0);
2231 			if (status != CAM_REQ_CMP) {
2232 				mtx_unlock(mtx);
2233 				printf("scsi_scan_bus: xpt_create_path failed"
2234 				    " with status %#x, bus scan halted\n",
2235 			       	    status);
2236 				xpt_free_ccb(request_ccb);
2237 				xpt_free_ccb((union ccb *)scan_info->cpi);
2238 				request_ccb = scan_info->request_ccb;
2239 				free(scan_info, M_CAMXPT);
2240 				request_ccb->ccb_h.status = status;
2241 				xpt_done(request_ccb);
2242 				break;
2243 			}
2244 			xpt_setup_ccb(&request_ccb->ccb_h, path,
2245 			    request_ccb->ccb_h.pinfo.priority);
2246 			request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
2247 			request_ccb->ccb_h.cbfcnp = scsi_scan_bus;
2248 			request_ccb->ccb_h.flags |= CAM_UNLOCKED;
2249 			request_ccb->ccb_h.ppriv_ptr0 = scan_info;
2250 			request_ccb->crcn.flags =
2251 			    scan_info->request_ccb->crcn.flags;
2252 		} else {
2253 			status = xpt_create_path(&path, NULL,
2254 						 path_id, target_id, lun_id);
2255 			/*
2256 			 * Free the old request path- we're done with it. We
2257 			 * do this *after* creating the new path so that
2258 			 * we don't remove a target that has our lun list
2259 			 * in the case that lun 0 is not present.
2260 			 */
2261 			xpt_free_path(oldpath);
2262 			if (status != CAM_REQ_CMP) {
2263 				printf("scsi_scan_bus: xpt_create_path failed "
2264 				       "with status %#x, halting LUN scan\n",
2265 			 	       status);
2266 				goto hop_again;
2267 			}
2268 			xpt_setup_ccb(&request_ccb->ccb_h, path,
2269 				      request_ccb->ccb_h.pinfo.priority);
2270 			request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
2271 			request_ccb->ccb_h.cbfcnp = scsi_scan_bus;
2272 			request_ccb->ccb_h.flags |= CAM_UNLOCKED;
2273 			request_ccb->ccb_h.ppriv_ptr0 = scan_info;
2274 			request_ccb->crcn.flags =
2275 				scan_info->request_ccb->crcn.flags;
2276 		}
2277 		mtx_unlock(mtx);
2278 		xpt_action(request_ccb);
2279 		break;
2280 	}
2281 	default:
2282 		break;
2283 	}
2284 }
2285 
2286 static void
2287 scsi_scan_lun(struct cam_periph *periph, struct cam_path *path,
2288 	     cam_flags flags, union ccb *request_ccb)
2289 {
2290 	struct ccb_pathinq cpi;
2291 	cam_status status;
2292 	struct cam_path *new_path;
2293 	struct cam_periph *old_periph;
2294 	int lock;
2295 
2296 	CAM_DEBUG(path, CAM_DEBUG_TRACE, ("scsi_scan_lun\n"));
2297 
2298 	memset(&cpi, 0, sizeof(cpi));
2299 	xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NONE);
2300 	cpi.ccb_h.func_code = XPT_PATH_INQ;
2301 	xpt_action((union ccb *)&cpi);
2302 
2303 	if (cpi.ccb_h.status != CAM_REQ_CMP) {
2304 		if (request_ccb != NULL) {
2305 			request_ccb->ccb_h.status = cpi.ccb_h.status;
2306 			xpt_done(request_ccb);
2307 		}
2308 		return;
2309 	}
2310 
2311 	if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) {
2312 		/*
2313 		 * Can't scan the bus on an adapter that
2314 		 * cannot perform the initiator role.
2315 		 */
2316 		if (request_ccb != NULL) {
2317 			request_ccb->ccb_h.status = CAM_REQ_CMP;
2318 			xpt_done(request_ccb);
2319 		}
2320 		return;
2321 	}
2322 
2323 	if (request_ccb == NULL) {
2324 		request_ccb = xpt_alloc_ccb_nowait();
2325 		if (request_ccb == NULL) {
2326 			xpt_print(path, "scsi_scan_lun: can't allocate CCB, "
2327 			    "can't continue\n");
2328 			return;
2329 		}
2330 		status = xpt_create_path(&new_path, NULL,
2331 					  path->bus->path_id,
2332 					  path->target->target_id,
2333 					  path->device->lun_id);
2334 		if (status != CAM_REQ_CMP) {
2335 			xpt_print(path, "scsi_scan_lun: can't create path, "
2336 			    "can't continue\n");
2337 			xpt_free_ccb(request_ccb);
2338 			return;
2339 		}
2340 		xpt_setup_ccb(&request_ccb->ccb_h, new_path, CAM_PRIORITY_XPT);
2341 		request_ccb->ccb_h.cbfcnp = xptscandone;
2342 		request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
2343 		request_ccb->ccb_h.flags |= CAM_UNLOCKED;
2344 		request_ccb->crcn.flags = flags;
2345 	}
2346 
2347 	lock = (xpt_path_owned(path) == 0);
2348 	if (lock)
2349 		xpt_path_lock(path);
2350 	if ((old_periph = cam_periph_find(path, "probe")) != NULL) {
2351 		if ((old_periph->flags & CAM_PERIPH_INVALID) == 0) {
2352 			probe_softc *softc;
2353 
2354 			softc = (probe_softc *)old_periph->softc;
2355 			TAILQ_INSERT_TAIL(&softc->request_ccbs,
2356 			    &request_ccb->ccb_h, periph_links.tqe);
2357 		} else {
2358 			request_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2359 			xpt_done(request_ccb);
2360 		}
2361 	} else {
2362 		status = cam_periph_alloc(proberegister, NULL, probecleanup,
2363 					  probestart, "probe",
2364 					  CAM_PERIPH_BIO,
2365 					  request_ccb->ccb_h.path, NULL, 0,
2366 					  request_ccb);
2367 
2368 		if (status != CAM_REQ_CMP) {
2369 			xpt_print(path, "scsi_scan_lun: cam_alloc_periph "
2370 			    "returned an error, can't continue probe\n");
2371 			request_ccb->ccb_h.status = status;
2372 			xpt_done(request_ccb);
2373 		}
2374 	}
2375 	if (lock)
2376 		xpt_path_unlock(path);
2377 }
2378 
2379 static void
2380 xptscandone(struct cam_periph *periph, union ccb *done_ccb)
2381 {
2382 
2383 	xpt_free_path(done_ccb->ccb_h.path);
2384 	xpt_free_ccb(done_ccb);
2385 }
2386 
2387 static struct cam_ed *
2388 scsi_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
2389 {
2390 	struct scsi_quirk_entry *quirk;
2391 	struct cam_ed *device;
2392 
2393 	device = xpt_alloc_device(bus, target, lun_id);
2394 	if (device == NULL)
2395 		return (NULL);
2396 
2397 	/*
2398 	 * Take the default quirk entry until we have inquiry
2399 	 * data and can determine a better quirk to use.
2400 	 */
2401 	quirk = &scsi_quirk_table[nitems(scsi_quirk_table) - 1];
2402 	device->quirk = (void *)quirk;
2403 	device->mintags = quirk->mintags;
2404 	device->maxtags = quirk->maxtags;
2405 	bzero(&device->inq_data, sizeof(device->inq_data));
2406 	device->inq_flags = 0;
2407 	device->queue_flags = 0;
2408 	device->serial_num = NULL;
2409 	device->serial_num_len = 0;
2410 	device->device_id = NULL;
2411 	device->device_id_len = 0;
2412 	device->supported_vpds = NULL;
2413 	device->supported_vpds_len = 0;
2414 	return (device);
2415 }
2416 
2417 static void
2418 scsi_devise_transport(struct cam_path *path)
2419 {
2420 	struct ccb_pathinq cpi;
2421 	struct ccb_trans_settings cts;
2422 	struct scsi_inquiry_data *inq_buf;
2423 
2424 	/* Get transport information from the SIM */
2425 	memset(&cpi, 0, sizeof(cpi));
2426 	xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NONE);
2427 	cpi.ccb_h.func_code = XPT_PATH_INQ;
2428 	xpt_action((union ccb *)&cpi);
2429 
2430 	inq_buf = NULL;
2431 	if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0)
2432 		inq_buf = &path->device->inq_data;
2433 	path->device->protocol = PROTO_SCSI;
2434 	path->device->protocol_version =
2435 	    inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version;
2436 	path->device->transport = cpi.transport;
2437 	path->device->transport_version = cpi.transport_version;
2438 
2439 	/*
2440 	 * Any device not using SPI3 features should
2441 	 * be considered SPI2 or lower.
2442 	 */
2443 	if (inq_buf != NULL) {
2444 		if (path->device->transport == XPORT_SPI
2445 		 && (inq_buf->spi3data & SID_SPI_MASK) == 0
2446 		 && path->device->transport_version > 2)
2447 			path->device->transport_version = 2;
2448 	} else {
2449 		struct cam_ed* otherdev;
2450 
2451 		for (otherdev = TAILQ_FIRST(&path->target->ed_entries);
2452 		     otherdev != NULL;
2453 		     otherdev = TAILQ_NEXT(otherdev, links)) {
2454 			if (otherdev != path->device)
2455 				break;
2456 		}
2457 
2458 		if (otherdev != NULL) {
2459 			/*
2460 			 * Initially assume the same versioning as
2461 			 * prior luns for this target.
2462 			 */
2463 			path->device->protocol_version =
2464 			    otherdev->protocol_version;
2465 			path->device->transport_version =
2466 			    otherdev->transport_version;
2467 		} else {
2468 			/* Until we know better, opt for safety */
2469 			path->device->protocol_version = 2;
2470 			if (path->device->transport == XPORT_SPI)
2471 				path->device->transport_version = 2;
2472 			else
2473 				path->device->transport_version = 0;
2474 		}
2475 	}
2476 
2477 	/*
2478 	 * XXX
2479 	 * For a device compliant with SPC-2 we should be able
2480 	 * to determine the transport version supported by
2481 	 * scrutinizing the version descriptors in the
2482 	 * inquiry buffer.
2483 	 */
2484 
2485 	/* Tell the controller what we think */
2486 	memset(&cts, 0, sizeof(cts));
2487 	xpt_setup_ccb(&cts.ccb_h, path, CAM_PRIORITY_NONE);
2488 	cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
2489 	cts.type = CTS_TYPE_CURRENT_SETTINGS;
2490 	cts.transport = path->device->transport;
2491 	cts.transport_version = path->device->transport_version;
2492 	cts.protocol = path->device->protocol;
2493 	cts.protocol_version = path->device->protocol_version;
2494 	cts.proto_specific.valid = 0;
2495 	cts.xport_specific.valid = 0;
2496 	xpt_action((union ccb *)&cts);
2497 }
2498 
2499 static void
2500 scsi_dev_advinfo(union ccb *start_ccb)
2501 {
2502 	struct cam_ed *device;
2503 	struct ccb_dev_advinfo *cdai;
2504 	off_t amt;
2505 
2506 	xpt_path_assert(start_ccb->ccb_h.path, MA_OWNED);
2507 	start_ccb->ccb_h.status = CAM_REQ_INVALID;
2508 	device = start_ccb->ccb_h.path->device;
2509 	cdai = &start_ccb->cdai;
2510 	switch(cdai->buftype) {
2511 	case CDAI_TYPE_SCSI_DEVID:
2512 		if (cdai->flags & CDAI_FLAG_STORE)
2513 			return;
2514 		cdai->provsiz = device->device_id_len;
2515 		if (device->device_id_len == 0)
2516 			break;
2517 		amt = device->device_id_len;
2518 		if (cdai->provsiz > cdai->bufsiz)
2519 			amt = cdai->bufsiz;
2520 		memcpy(cdai->buf, device->device_id, amt);
2521 		break;
2522 	case CDAI_TYPE_SERIAL_NUM:
2523 		if (cdai->flags & CDAI_FLAG_STORE)
2524 			return;
2525 		cdai->provsiz = device->serial_num_len;
2526 		if (device->serial_num_len == 0)
2527 			break;
2528 		amt = device->serial_num_len;
2529 		if (cdai->provsiz > cdai->bufsiz)
2530 			amt = cdai->bufsiz;
2531 		memcpy(cdai->buf, device->serial_num, amt);
2532 		break;
2533 	case CDAI_TYPE_PHYS_PATH:
2534 		if (cdai->flags & CDAI_FLAG_STORE) {
2535 			if (device->physpath != NULL) {
2536 				free(device->physpath, M_CAMXPT);
2537 				device->physpath = NULL;
2538 				device->physpath_len = 0;
2539 			}
2540 			/* Clear existing buffer if zero length */
2541 			if (cdai->bufsiz == 0)
2542 				break;
2543 			device->physpath = malloc(cdai->bufsiz, M_CAMXPT, M_NOWAIT);
2544 			if (device->physpath == NULL) {
2545 				start_ccb->ccb_h.status = CAM_REQ_ABORTED;
2546 				return;
2547 			}
2548 			device->physpath_len = cdai->bufsiz;
2549 			memcpy(device->physpath, cdai->buf, cdai->bufsiz);
2550 		} else {
2551 			cdai->provsiz = device->physpath_len;
2552 			if (device->physpath_len == 0)
2553 				break;
2554 			amt = device->physpath_len;
2555 			if (cdai->provsiz > cdai->bufsiz)
2556 				amt = cdai->bufsiz;
2557 			memcpy(cdai->buf, device->physpath, amt);
2558 		}
2559 		break;
2560 	case CDAI_TYPE_RCAPLONG:
2561 		if (cdai->flags & CDAI_FLAG_STORE) {
2562 			if (device->rcap_buf != NULL) {
2563 				free(device->rcap_buf, M_CAMXPT);
2564 				device->rcap_buf = NULL;
2565 			}
2566 
2567 			device->rcap_len = cdai->bufsiz;
2568 			/* Clear existing buffer if zero length */
2569 			if (cdai->bufsiz == 0)
2570 				break;
2571 
2572 			device->rcap_buf = malloc(cdai->bufsiz, M_CAMXPT,
2573 						  M_NOWAIT);
2574 			if (device->rcap_buf == NULL) {
2575 				start_ccb->ccb_h.status = CAM_REQ_ABORTED;
2576 				return;
2577 			}
2578 
2579 			memcpy(device->rcap_buf, cdai->buf, cdai->bufsiz);
2580 		} else {
2581 			cdai->provsiz = device->rcap_len;
2582 			if (device->rcap_len == 0)
2583 				break;
2584 			amt = device->rcap_len;
2585 			if (cdai->provsiz > cdai->bufsiz)
2586 				amt = cdai->bufsiz;
2587 			memcpy(cdai->buf, device->rcap_buf, amt);
2588 		}
2589 		break;
2590 	case CDAI_TYPE_EXT_INQ:
2591 		/*
2592 		 * We fetch extended inquiry data during probe, if
2593 		 * available.  We don't allow changing it.
2594 		 */
2595 		if (cdai->flags & CDAI_FLAG_STORE)
2596 			return;
2597 		cdai->provsiz = device->ext_inq_len;
2598 		if (device->ext_inq_len == 0)
2599 			break;
2600 		amt = device->ext_inq_len;
2601 		if (cdai->provsiz > cdai->bufsiz)
2602 			amt = cdai->bufsiz;
2603 		memcpy(cdai->buf, device->ext_inq, amt);
2604 		break;
2605 	default:
2606 		return;
2607 	}
2608 	start_ccb->ccb_h.status = CAM_REQ_CMP;
2609 
2610 	if (cdai->flags & CDAI_FLAG_STORE) {
2611 		xpt_async(AC_ADVINFO_CHANGED, start_ccb->ccb_h.path,
2612 			  (void *)(uintptr_t)cdai->buftype);
2613 	}
2614 }
2615 
2616 static void
2617 scsi_action(union ccb *start_ccb)
2618 {
2619 
2620 	if (start_ccb->ccb_h.func_code != XPT_SCSI_IO) {
2621 		KASSERT((start_ccb->ccb_h.alloc_flags & CAM_CCB_FROM_UMA) == 0,
2622 		    ("%s: ccb %p, func_code %#x should not be allocated "
2623 		    "from UMA zone\n",
2624 		    __func__, start_ccb, start_ccb->ccb_h.func_code));
2625 	}
2626 
2627 	switch (start_ccb->ccb_h.func_code) {
2628 	case XPT_SET_TRAN_SETTINGS:
2629 	{
2630 		scsi_set_transfer_settings(&start_ccb->cts,
2631 					   start_ccb->ccb_h.path,
2632 					   /*async_update*/FALSE);
2633 		break;
2634 	}
2635 	case XPT_SCAN_BUS:
2636 	case XPT_SCAN_TGT:
2637 		scsi_scan_bus(start_ccb->ccb_h.path->periph, start_ccb);
2638 		break;
2639 	case XPT_SCAN_LUN:
2640 		scsi_scan_lun(start_ccb->ccb_h.path->periph,
2641 			      start_ccb->ccb_h.path, start_ccb->crcn.flags,
2642 			      start_ccb);
2643 		break;
2644 	case XPT_DEV_ADVINFO:
2645 	{
2646 		scsi_dev_advinfo(start_ccb);
2647 		break;
2648 	}
2649 	default:
2650 		xpt_action_default(start_ccb);
2651 		break;
2652 	}
2653 }
2654 
2655 static void
2656 scsi_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_path *path,
2657 			   int async_update)
2658 {
2659 	struct	ccb_pathinq cpi;
2660 	struct	ccb_trans_settings cur_cts;
2661 	struct	ccb_trans_settings_scsi *scsi;
2662 	struct	ccb_trans_settings_scsi *cur_scsi;
2663 	struct	scsi_inquiry_data *inq_data;
2664 	struct	cam_ed *device;
2665 
2666 	if (path == NULL || (device = path->device) == NULL) {
2667 		cts->ccb_h.status = CAM_PATH_INVALID;
2668 		xpt_done((union ccb *)cts);
2669 		return;
2670 	}
2671 
2672 	if (cts->protocol == PROTO_UNKNOWN
2673 	 || cts->protocol == PROTO_UNSPECIFIED) {
2674 		cts->protocol = device->protocol;
2675 		cts->protocol_version = device->protocol_version;
2676 	}
2677 
2678 	if (cts->protocol_version == PROTO_VERSION_UNKNOWN
2679 	 || cts->protocol_version == PROTO_VERSION_UNSPECIFIED)
2680 		cts->protocol_version = device->protocol_version;
2681 
2682 	if (cts->protocol != device->protocol) {
2683 		xpt_print(path, "Uninitialized Protocol %x:%x?\n",
2684 		       cts->protocol, device->protocol);
2685 		cts->protocol = device->protocol;
2686 	}
2687 
2688 	if (cts->protocol_version > device->protocol_version) {
2689 		if (bootverbose) {
2690 			xpt_print(path, "Down reving Protocol "
2691 			    "Version from %d to %d?\n", cts->protocol_version,
2692 			    device->protocol_version);
2693 		}
2694 		cts->protocol_version = device->protocol_version;
2695 	}
2696 
2697 	if (cts->transport == XPORT_UNKNOWN
2698 	 || cts->transport == XPORT_UNSPECIFIED) {
2699 		cts->transport = device->transport;
2700 		cts->transport_version = device->transport_version;
2701 	}
2702 
2703 	if (cts->transport_version == XPORT_VERSION_UNKNOWN
2704 	 || cts->transport_version == XPORT_VERSION_UNSPECIFIED)
2705 		cts->transport_version = device->transport_version;
2706 
2707 	if (cts->transport != device->transport) {
2708 		xpt_print(path, "Uninitialized Transport %x:%x?\n",
2709 		    cts->transport, device->transport);
2710 		cts->transport = device->transport;
2711 	}
2712 
2713 	if (cts->transport_version > device->transport_version) {
2714 		if (bootverbose) {
2715 			xpt_print(path, "Down reving Transport "
2716 			    "Version from %d to %d?\n", cts->transport_version,
2717 			    device->transport_version);
2718 		}
2719 		cts->transport_version = device->transport_version;
2720 	}
2721 
2722 	/*
2723 	 * Nothing more of interest to do unless
2724 	 * this is a device connected via the
2725 	 * SCSI protocol.
2726 	 */
2727 	if (cts->protocol != PROTO_SCSI) {
2728 		if (async_update == FALSE)
2729 			xpt_action_default((union ccb *)cts);
2730 		return;
2731 	}
2732 
2733 	inq_data = &device->inq_data;
2734 	scsi = &cts->proto_specific.scsi;
2735 	memset(&cpi, 0, sizeof(cpi));
2736 	xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NONE);
2737 	cpi.ccb_h.func_code = XPT_PATH_INQ;
2738 	xpt_action((union ccb *)&cpi);
2739 
2740 	/* SCSI specific sanity checking */
2741 	if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0
2742 	 || (INQ_DATA_TQ_ENABLED(inq_data)) == 0
2743 	 || (device->queue_flags & SCP_QUEUE_DQUE) != 0
2744 	 || (device->mintags == 0)) {
2745 		/*
2746 		 * Can't tag on hardware that doesn't support tags,
2747 		 * doesn't have it enabled, or has broken tag support.
2748 		 */
2749 		scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
2750 	}
2751 
2752 	if (async_update == FALSE) {
2753 		/*
2754 		 * Perform sanity checking against what the
2755 		 * controller and device can do.
2756 		 */
2757 		memset(&cur_cts, 0, sizeof(cur_cts));
2758 		xpt_setup_ccb(&cur_cts.ccb_h, path, CAM_PRIORITY_NONE);
2759 		cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
2760 		cur_cts.type = cts->type;
2761 		xpt_action((union ccb *)&cur_cts);
2762 		if (cam_ccb_status((union ccb *)&cur_cts) != CAM_REQ_CMP) {
2763 			return;
2764 		}
2765 		cur_scsi = &cur_cts.proto_specific.scsi;
2766 		if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) {
2767 			scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
2768 			scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB;
2769 		}
2770 		if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0)
2771 			scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
2772 	}
2773 
2774 	/* SPI specific sanity checking */
2775 	if (cts->transport == XPORT_SPI && async_update == FALSE) {
2776 		u_int spi3caps;
2777 		struct ccb_trans_settings_spi *spi;
2778 		struct ccb_trans_settings_spi *cur_spi;
2779 
2780 		spi = &cts->xport_specific.spi;
2781 
2782 		cur_spi = &cur_cts.xport_specific.spi;
2783 
2784 		/* Fill in any gaps in what the user gave us */
2785 		if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
2786 			spi->sync_period = cur_spi->sync_period;
2787 		if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
2788 			spi->sync_period = 0;
2789 		if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
2790 			spi->sync_offset = cur_spi->sync_offset;
2791 		if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
2792 			spi->sync_offset = 0;
2793 		if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
2794 			spi->ppr_options = cur_spi->ppr_options;
2795 		if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
2796 			spi->ppr_options = 0;
2797 		if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
2798 			spi->bus_width = cur_spi->bus_width;
2799 		if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
2800 			spi->bus_width = 0;
2801 		if ((spi->valid & CTS_SPI_VALID_DISC) == 0) {
2802 			spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
2803 			spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB;
2804 		}
2805 		if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0)
2806 			spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
2807 		if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
2808 		  && (inq_data->flags & SID_Sync) == 0
2809 		  && cts->type == CTS_TYPE_CURRENT_SETTINGS)
2810 		 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)) {
2811 			/* Force async */
2812 			spi->sync_period = 0;
2813 			spi->sync_offset = 0;
2814 		}
2815 
2816 		switch (spi->bus_width) {
2817 		case MSG_EXT_WDTR_BUS_32_BIT:
2818 			if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
2819 			  || (inq_data->flags & SID_WBus32) != 0
2820 			  || cts->type == CTS_TYPE_USER_SETTINGS)
2821 			 && (cpi.hba_inquiry & PI_WIDE_32) != 0)
2822 				break;
2823 			/* Fall Through to 16-bit */
2824 		case MSG_EXT_WDTR_BUS_16_BIT:
2825 			if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
2826 			  || (inq_data->flags & SID_WBus16) != 0
2827 			  || cts->type == CTS_TYPE_USER_SETTINGS)
2828 			 && (cpi.hba_inquiry & PI_WIDE_16) != 0) {
2829 				spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
2830 				break;
2831 			}
2832 			/* Fall Through to 8-bit */
2833 		default: /* New bus width?? */
2834 		case MSG_EXT_WDTR_BUS_8_BIT:
2835 			/* All targets can do this */
2836 			spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
2837 			break;
2838 		}
2839 
2840 		spi3caps = cpi.xport_specific.spi.ppr_options;
2841 		if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
2842 		 && cts->type == CTS_TYPE_CURRENT_SETTINGS)
2843 			spi3caps &= inq_data->spi3data;
2844 
2845 		if ((spi3caps & SID_SPI_CLOCK_DT) == 0)
2846 			spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ;
2847 
2848 		if ((spi3caps & SID_SPI_IUS) == 0)
2849 			spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2850 
2851 		if ((spi3caps & SID_SPI_QAS) == 0)
2852 			spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ;
2853 
2854 		/* No SPI Transfer settings are allowed unless we are wide */
2855 		if (spi->bus_width == 0)
2856 			spi->ppr_options = 0;
2857 
2858 		if ((spi->valid & CTS_SPI_VALID_DISC)
2859 		 && ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0)) {
2860 			/*
2861 			 * Can't tag queue without disconnection.
2862 			 */
2863 			scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
2864 			scsi->valid |= CTS_SCSI_VALID_TQ;
2865 		}
2866 
2867 		/*
2868 		 * If we are currently performing tagged transactions to
2869 		 * this device and want to change its negotiation parameters,
2870 		 * go non-tagged for a bit to give the controller a chance to
2871 		 * negotiate unhampered by tag messages.
2872 		 */
2873 		if (cts->type == CTS_TYPE_CURRENT_SETTINGS
2874 		 && (device->inq_flags & SID_CmdQue) != 0
2875 		 && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
2876 		 && (spi->flags & (CTS_SPI_VALID_SYNC_RATE|
2877 				   CTS_SPI_VALID_SYNC_OFFSET|
2878 				   CTS_SPI_VALID_BUS_WIDTH)) != 0)
2879 			scsi_toggle_tags(path);
2880 	}
2881 
2882 	if (cts->type == CTS_TYPE_CURRENT_SETTINGS
2883 	 && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) {
2884 		int device_tagenb;
2885 
2886 		/*
2887 		 * If we are transitioning from tags to no-tags or
2888 		 * vice-versa, we need to carefully freeze and restart
2889 		 * the queue so that we don't overlap tagged and non-tagged
2890 		 * commands.  We also temporarily stop tags if there is
2891 		 * a change in transfer negotiation settings to allow
2892 		 * "tag-less" negotiation.
2893 		 */
2894 		if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
2895 		 || (device->inq_flags & SID_CmdQue) != 0)
2896 			device_tagenb = TRUE;
2897 		else
2898 			device_tagenb = FALSE;
2899 
2900 		if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
2901 		  && device_tagenb == FALSE)
2902 		 || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0
2903 		  && device_tagenb == TRUE)) {
2904 			if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) {
2905 				/*
2906 				 * Delay change to use tags until after a
2907 				 * few commands have gone to this device so
2908 				 * the controller has time to perform transfer
2909 				 * negotiations without tagged messages getting
2910 				 * in the way.
2911 				 */
2912 				device->tag_delay_count = CAM_TAG_DELAY_COUNT;
2913 				device->flags |= CAM_DEV_TAG_AFTER_COUNT;
2914 			} else {
2915 				xpt_stop_tags(path);
2916 			}
2917 		}
2918 	}
2919 	if (async_update == FALSE)
2920 		xpt_action_default((union ccb *)cts);
2921 }
2922 
2923 static void
2924 scsi_toggle_tags(struct cam_path *path)
2925 {
2926 	struct cam_ed *dev;
2927 
2928 	/*
2929 	 * Give controllers a chance to renegotiate
2930 	 * before starting tag operations.  We
2931 	 * "toggle" tagged queuing off then on
2932 	 * which causes the tag enable command delay
2933 	 * counter to come into effect.
2934 	 */
2935 	dev = path->device;
2936 	if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
2937 	 || ((dev->inq_flags & SID_CmdQue) != 0
2938  	  && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) {
2939 		struct ccb_trans_settings cts;
2940 
2941 		memset(&cts, 0, sizeof(cts));
2942 		xpt_setup_ccb(&cts.ccb_h, path, CAM_PRIORITY_NONE);
2943 		cts.protocol = PROTO_SCSI;
2944 		cts.protocol_version = PROTO_VERSION_UNSPECIFIED;
2945 		cts.transport = XPORT_UNSPECIFIED;
2946 		cts.transport_version = XPORT_VERSION_UNSPECIFIED;
2947 		cts.proto_specific.scsi.flags = 0;
2948 		cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ;
2949 		scsi_set_transfer_settings(&cts, path,
2950 					  /*async_update*/TRUE);
2951 		cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB;
2952 		scsi_set_transfer_settings(&cts, path,
2953 					  /*async_update*/TRUE);
2954 	}
2955 }
2956 
2957 /*
2958  * Handle any per-device event notifications that require action by the XPT.
2959  */
2960 static void
2961 scsi_dev_async(uint32_t async_code, struct cam_eb *bus, struct cam_et *target,
2962 	      struct cam_ed *device, void *async_arg)
2963 {
2964 	cam_status status;
2965 	struct cam_path newpath;
2966 
2967 	/*
2968 	 * We only need to handle events for real devices.
2969 	 */
2970 	if (target->target_id == CAM_TARGET_WILDCARD
2971 	 || device->lun_id == CAM_LUN_WILDCARD)
2972 		return;
2973 
2974 	/*
2975 	 * We need our own path with wildcards expanded to
2976 	 * handle certain types of events.
2977 	 */
2978 	if ((async_code == AC_SENT_BDR)
2979 	 || (async_code == AC_BUS_RESET)
2980 	 || (async_code == AC_INQ_CHANGED))
2981 		status = xpt_compile_path(&newpath, NULL,
2982 					  bus->path_id,
2983 					  target->target_id,
2984 					  device->lun_id);
2985 	else
2986 		status = CAM_REQ_CMP_ERR;
2987 
2988 	if (status == CAM_REQ_CMP) {
2989 		/*
2990 		 * Allow transfer negotiation to occur in a
2991 		 * tag free environment and after settle delay.
2992 		 */
2993 		if (async_code == AC_SENT_BDR
2994 		 || async_code == AC_BUS_RESET) {
2995 			cam_freeze_devq(&newpath);
2996 			cam_release_devq(&newpath,
2997 				RELSIM_RELEASE_AFTER_TIMEOUT,
2998 				/*reduction*/0,
2999 				/*timeout*/scsi_delay,
3000 				/*getcount_only*/0);
3001 			scsi_toggle_tags(&newpath);
3002 		}
3003 
3004 		if (async_code == AC_INQ_CHANGED) {
3005 			/*
3006 			 * We've sent a start unit command, or
3007 			 * something similar to a device that
3008 			 * may have caused its inquiry data to
3009 			 * change. So we re-scan the device to
3010 			 * refresh the inquiry data for it.
3011 			 */
3012 			scsi_scan_lun(newpath.periph, &newpath,
3013 				     CAM_EXPECT_INQ_CHANGE, NULL);
3014 		}
3015 		xpt_release_path(&newpath);
3016 	} else if (async_code == AC_LOST_DEVICE &&
3017 	    (device->flags & CAM_DEV_UNCONFIGURED) == 0) {
3018 		device->flags |= CAM_DEV_UNCONFIGURED;
3019 		xpt_release_device(device);
3020 	} else if (async_code == AC_TRANSFER_NEG) {
3021 		struct ccb_trans_settings *settings;
3022 		struct cam_path path;
3023 
3024 		settings = (struct ccb_trans_settings *)async_arg;
3025 		xpt_compile_path(&path, NULL, bus->path_id, target->target_id,
3026 				 device->lun_id);
3027 		scsi_set_transfer_settings(settings, &path,
3028 					  /*async_update*/TRUE);
3029 		xpt_release_path(&path);
3030 	}
3031 }
3032 
3033 static void
3034 _scsi_announce_periph(struct cam_periph *periph, u_int *speed, u_int *freq, struct ccb_trans_settings *cts)
3035 {
3036 	struct	ccb_pathinq cpi;
3037 	struct	cam_path *path = periph->path;
3038 
3039 	cam_periph_assert(periph, MA_OWNED);
3040 
3041 	xpt_setup_ccb(&cts->ccb_h, path, CAM_PRIORITY_NORMAL);
3042 	cts->ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
3043 	cts->type = CTS_TYPE_CURRENT_SETTINGS;
3044 	xpt_action((union ccb*)cts);
3045 	if (cam_ccb_status((union ccb *)cts) != CAM_REQ_CMP)
3046 		return;
3047 
3048 	/* Ask the SIM for its base transfer speed */
3049 	memset(&cpi, 0, sizeof(cpi));
3050 	xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3051 	cpi.ccb_h.func_code = XPT_PATH_INQ;
3052 	xpt_action((union ccb *)&cpi);
3053 
3054 	/* Report connection speed */
3055 	*speed = cpi.base_transfer_speed;
3056 	*freq = 0;
3057 
3058 	if (cts->ccb_h.status == CAM_REQ_CMP && cts->transport == XPORT_SPI) {
3059 		struct	ccb_trans_settings_spi *spi =
3060 		    &cts->xport_specific.spi;
3061 
3062 		if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0
3063 		  && spi->sync_offset != 0) {
3064 			*freq = scsi_calc_syncsrate(spi->sync_period);
3065 			*speed = *freq;
3066 		}
3067 		if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0)
3068 			*speed *= (0x01 << spi->bus_width);
3069 	}
3070 	if (cts->ccb_h.status == CAM_REQ_CMP && cts->transport == XPORT_FC) {
3071 		struct	ccb_trans_settings_fc *fc =
3072 		    &cts->xport_specific.fc;
3073 
3074 		if (fc->valid & CTS_FC_VALID_SPEED)
3075 			*speed = fc->bitrate;
3076 	}
3077 	if (cts->ccb_h.status == CAM_REQ_CMP && cts->transport == XPORT_SAS) {
3078 		struct	ccb_trans_settings_sas *sas =
3079 		    &cts->xport_specific.sas;
3080 
3081 		if (sas->valid & CTS_SAS_VALID_SPEED)
3082 			*speed = sas->bitrate;
3083 	}
3084 }
3085 
3086 static void
3087 scsi_announce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb)
3088 {
3089 	struct	ccb_trans_settings cts;
3090 	u_int speed, freq, mb;
3091 
3092 	memset(&cts, 0, sizeof(cts));
3093 	_scsi_announce_periph(periph, &speed, &freq, &cts);
3094 	if (cam_ccb_status((union ccb *)&cts) != CAM_REQ_CMP)
3095 		return;
3096 
3097 	mb = speed / 1000;
3098 	if (mb > 0)
3099 		sbuf_printf(sb, "%s%d: %d.%03dMB/s transfers",
3100 		       periph->periph_name, periph->unit_number,
3101 		       mb, speed % 1000);
3102 	else
3103 		sbuf_printf(sb, "%s%d: %dKB/s transfers", periph->periph_name,
3104 		       periph->unit_number, speed);
3105 	/* Report additional information about SPI connections */
3106 	if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) {
3107 		struct	ccb_trans_settings_spi *spi;
3108 
3109 		spi = &cts.xport_specific.spi;
3110 		if (freq != 0) {
3111 			sbuf_printf(sb, " (%d.%03dMHz%s, offset %d", freq / 1000,
3112 			       freq % 1000,
3113 			       (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0
3114 			     ? " DT" : "",
3115 			       spi->sync_offset);
3116 		}
3117 		if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0
3118 		 && spi->bus_width > 0) {
3119 			if (freq != 0) {
3120 				sbuf_cat(sb, ", ");
3121 			} else {
3122 				sbuf_cat(sb, " (");
3123 			}
3124 			sbuf_printf(sb, "%dbit)", 8 * (0x01 << spi->bus_width));
3125 		} else if (freq != 0) {
3126 			sbuf_putc(sb, ')');
3127 		}
3128 	}
3129 	if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) {
3130 		struct	ccb_trans_settings_fc *fc;
3131 
3132 		fc = &cts.xport_specific.fc;
3133 		if (fc->valid & CTS_FC_VALID_WWNN)
3134 			sbuf_printf(sb, " WWNN 0x%llx", (long long) fc->wwnn);
3135 		if (fc->valid & CTS_FC_VALID_WWPN)
3136 			sbuf_printf(sb, " WWPN 0x%llx", (long long) fc->wwpn);
3137 		if (fc->valid & CTS_FC_VALID_PORT)
3138 			sbuf_printf(sb, " PortID 0x%x", fc->port);
3139 	}
3140 	sbuf_putc(sb, '\n');
3141 }
3142 
3143 static void
3144 scsi_proto_announce_sbuf(struct cam_ed *device, struct sbuf *sb)
3145 {
3146 	scsi_print_inquiry_sbuf(sb, &device->inq_data);
3147 }
3148 
3149 static void
3150 scsi_proto_denounce_sbuf(struct cam_ed *device, struct sbuf *sb)
3151 {
3152 	scsi_print_inquiry_short_sbuf(sb, &device->inq_data);
3153 }
3154 
3155 static void
3156 scsi_proto_debug_out(union ccb *ccb)
3157 {
3158 	char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3159 	struct cam_ed *device;
3160 
3161 	if (ccb->ccb_h.func_code != XPT_SCSI_IO)
3162 		return;
3163 
3164 	device = ccb->ccb_h.path->device;
3165 	CAM_DEBUG(ccb->ccb_h.path,
3166 	    CAM_DEBUG_CDB,("%s. CDB: %s\n",
3167 		scsi_op_desc(scsiio_cdb_ptr(&ccb->csio)[0], &device->inq_data),
3168 		scsi_cdb_string(scsiio_cdb_ptr(&ccb->csio), cdb_str, sizeof(cdb_str))));
3169 }
3170