xref: /freebsd/sys/cam/scsi/scsi_da.c (revision 271c3a9060f2ee55607ebe146523f888e1db2654)
1 /*-
2  * Implementation of SCSI Direct Access Peripheral driver for CAM.
3  *
4  * Copyright (c) 1997 Justin T. Gibbs.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions, and the following disclaimer,
12  *    without modification, immediately at the beginning of the file.
13  * 2. The name of the author may not be used to endorse or promote products
14  *    derived from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31 
32 #include <sys/param.h>
33 
34 #ifdef _KERNEL
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/bio.h>
38 #include <sys/sysctl.h>
39 #include <sys/taskqueue.h>
40 #include <sys/lock.h>
41 #include <sys/mutex.h>
42 #include <sys/conf.h>
43 #include <sys/devicestat.h>
44 #include <sys/eventhandler.h>
45 #include <sys/malloc.h>
46 #include <sys/cons.h>
47 #include <geom/geom_disk.h>
48 #endif /* _KERNEL */
49 
50 #ifndef _KERNEL
51 #include <stdio.h>
52 #include <string.h>
53 #endif /* _KERNEL */
54 
55 #include <cam/cam.h>
56 #include <cam/cam_ccb.h>
57 #include <cam/cam_periph.h>
58 #include <cam/cam_xpt_periph.h>
59 #include <cam/cam_sim.h>
60 
61 #include <cam/scsi/scsi_message.h>
62 
63 #ifndef _KERNEL
64 #include <cam/scsi/scsi_da.h>
65 #endif /* !_KERNEL */
66 
67 #ifdef _KERNEL
68 typedef enum {
69 	DA_STATE_PROBE,
70 	DA_STATE_PROBE2,
71 	DA_STATE_NORMAL
72 } da_state;
73 
74 typedef enum {
75 	DA_FLAG_PACK_INVALID	= 0x001,
76 	DA_FLAG_NEW_PACK	= 0x002,
77 	DA_FLAG_PACK_LOCKED	= 0x004,
78 	DA_FLAG_PACK_REMOVABLE	= 0x008,
79 	DA_FLAG_TAGGED_QUEUING	= 0x010,
80 	DA_FLAG_NEED_OTAG	= 0x020,
81 	DA_FLAG_WENT_IDLE	= 0x040,
82 	DA_FLAG_RETRY_UA	= 0x080,
83 	DA_FLAG_OPEN		= 0x100,
84 	DA_FLAG_SCTX_INIT	= 0x200
85 } da_flags;
86 
87 typedef enum {
88 	DA_Q_NONE		= 0x00,
89 	DA_Q_NO_SYNC_CACHE	= 0x01,
90 	DA_Q_NO_6_BYTE		= 0x02,
91 	DA_Q_NO_PREVENT		= 0x04
92 } da_quirks;
93 
94 typedef enum {
95 	DA_CCB_PROBE		= 0x01,
96 	DA_CCB_PROBE2		= 0x02,
97 	DA_CCB_BUFFER_IO	= 0x03,
98 	DA_CCB_WAITING		= 0x04,
99 	DA_CCB_DUMP		= 0x05,
100 	DA_CCB_TYPE_MASK	= 0x0F,
101 	DA_CCB_RETRY_UA		= 0x10
102 } da_ccb_state;
103 
104 /* Offsets into our private area for storing information */
105 #define ccb_state	ppriv_field0
106 #define ccb_bp		ppriv_ptr1
107 
108 struct disk_params {
109 	u_int8_t  heads;
110 	u_int32_t cylinders;
111 	u_int8_t  secs_per_track;
112 	u_int32_t secsize;	/* Number of bytes/sector */
113 	u_int64_t sectors;	/* total number sectors */
114 };
115 
116 struct da_softc {
117 	struct	 bio_queue_head bio_queue;
118 	SLIST_ENTRY(da_softc) links;
119 	LIST_HEAD(, ccb_hdr) pending_ccbs;
120 	da_state state;
121 	da_flags flags;
122 	da_quirks quirks;
123 	int	 minimum_cmd_size;
124 	int	 ordered_tag_count;
125 	int	 outstanding_cmds;
126 	struct	 disk_params params;
127 	struct	 disk *disk;
128 	union	 ccb saved_ccb;
129 	struct task		sysctl_task;
130 	struct sysctl_ctx_list	sysctl_ctx;
131 	struct sysctl_oid	*sysctl_tree;
132 	struct callout		sendordered_c;
133 };
134 
135 struct da_quirk_entry {
136 	struct scsi_inquiry_pattern inq_pat;
137 	da_quirks quirks;
138 };
139 
140 static const char quantum[] = "QUANTUM";
141 static const char microp[] = "MICROP";
142 
143 static struct da_quirk_entry da_quirk_table[] =
144 {
145 	/* SPI, FC devices */
146 	{
147 		/*
148 		 * Fujitsu M2513A MO drives.
149 		 * Tested devices: M2513A2 firmware versions 1200 & 1300.
150 		 * (dip switch selects whether T_DIRECT or T_OPTICAL device)
151 		 * Reported by: W.Scholten <whs@xs4all.nl>
152 		 */
153 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
154 		/*quirks*/ DA_Q_NO_SYNC_CACHE
155 	},
156 	{
157 		/* See above. */
158 		{T_OPTICAL, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
159 		/*quirks*/ DA_Q_NO_SYNC_CACHE
160 	},
161 	{
162 		/*
163 		 * This particular Fujitsu drive doesn't like the
164 		 * synchronize cache command.
165 		 * Reported by: Tom Jackson <toj@gorilla.net>
166 		 */
167 		{T_DIRECT, SIP_MEDIA_FIXED, "FUJITSU", "M2954*", "*"},
168 		/*quirks*/ DA_Q_NO_SYNC_CACHE
169 	},
170 	{
171 		/*
172 		 * This drive doesn't like the synchronize cache command
173 		 * either.  Reported by: Matthew Jacob <mjacob@feral.com>
174 		 * in NetBSD PR kern/6027, August 24, 1998.
175 		 */
176 		{T_DIRECT, SIP_MEDIA_FIXED, microp, "2217*", "*"},
177 		/*quirks*/ DA_Q_NO_SYNC_CACHE
178 	},
179 	{
180 		/*
181 		 * This drive doesn't like the synchronize cache command
182 		 * either.  Reported by: Hellmuth Michaelis (hm@kts.org)
183 		 * (PR 8882).
184 		 */
185 		{T_DIRECT, SIP_MEDIA_FIXED, microp, "2112*", "*"},
186 		/*quirks*/ DA_Q_NO_SYNC_CACHE
187 	},
188 	{
189 		/*
190 		 * Doesn't like the synchronize cache command.
191 		 * Reported by: Blaz Zupan <blaz@gold.amis.net>
192 		 */
193 		{T_DIRECT, SIP_MEDIA_FIXED, "NEC", "D3847*", "*"},
194 		/*quirks*/ DA_Q_NO_SYNC_CACHE
195 	},
196 	{
197 		/*
198 		 * Doesn't like the synchronize cache command.
199 		 * Reported by: Blaz Zupan <blaz@gold.amis.net>
200 		 */
201 		{T_DIRECT, SIP_MEDIA_FIXED, quantum, "MAVERICK 540S", "*"},
202 		/*quirks*/ DA_Q_NO_SYNC_CACHE
203 	},
204 	{
205 		/*
206 		 * Doesn't like the synchronize cache command.
207 		 */
208 		{T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS525S", "*"},
209 		/*quirks*/ DA_Q_NO_SYNC_CACHE
210 	},
211 	{
212 		/*
213 		 * Doesn't like the synchronize cache command.
214 		 * Reported by: walter@pelissero.de
215 		 */
216 		{T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS540S", "*"},
217 		/*quirks*/ DA_Q_NO_SYNC_CACHE
218 	},
219 	{
220 		/*
221 		 * Doesn't work correctly with 6 byte reads/writes.
222 		 * Returns illegal request, and points to byte 9 of the
223 		 * 6-byte CDB.
224 		 * Reported by:  Adam McDougall <bsdx@spawnet.com>
225 		 */
226 		{T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 4*", "*"},
227 		/*quirks*/ DA_Q_NO_6_BYTE
228 	},
229 	{
230 		/* See above. */
231 		{T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 2*", "*"},
232 		/*quirks*/ DA_Q_NO_6_BYTE
233 	},
234 	{
235 		/*
236 		 * Doesn't like the synchronize cache command.
237 		 * Reported by: walter@pelissero.de
238 		 */
239 		{T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CP3500*", "*"},
240 		/*quirks*/ DA_Q_NO_SYNC_CACHE
241 	},
242 	{
243 		/*
244 		 * The CISS RAID controllers do not support SYNC_CACHE
245 		 */
246 		{T_DIRECT, SIP_MEDIA_FIXED, "COMPAQ", "RAID*", "*"},
247 		/*quirks*/ DA_Q_NO_SYNC_CACHE
248 	},
249 	/* USB mass storage devices supported by umass(4) */
250 	{
251 		/*
252 		 * EXATELECOM (Sigmatel) i-Bead 100/105 USB Flash MP3 Player
253 		 * PR: kern/51675
254 		 */
255 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "EXATEL", "i-BEAD10*", "*"},
256 		/*quirks*/ DA_Q_NO_SYNC_CACHE
257 	},
258 	{
259 		/*
260 		 * Power Quotient Int. (PQI) USB flash key
261 		 * PR: kern/53067
262 		 */
263 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Generic*", "USB Flash Disk*",
264 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
265 	},
266  	{
267  		/*
268  		 * Creative Nomad MUVO mp3 player (USB)
269  		 * PR: kern/53094
270  		 */
271  		{T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "NOMAD_MUVO", "*"},
272  		/*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
273  	},
274 	{
275 		/*
276 		 * Jungsoft NEXDISK USB flash key
277 		 * PR: kern/54737
278 		 */
279 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "JUNGSOFT", "NEXDISK*", "*"},
280 		/*quirks*/ DA_Q_NO_SYNC_CACHE
281 	},
282 	{
283 		/*
284 		 * FreeDik USB Mini Data Drive
285 		 * PR: kern/54786
286 		 */
287 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "FreeDik*", "Mini Data Drive",
288 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
289 	},
290 	{
291 		/*
292 		 * Sigmatel USB Flash MP3 Player
293 		 * PR: kern/57046
294 		 */
295 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "SigmaTel", "MSCN", "*"},
296 		/*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
297 	},
298 	{
299 		/*
300 		 * Neuros USB Digital Audio Computer
301 		 * PR: kern/63645
302 		 */
303 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "NEUROS", "dig. audio comp.",
304 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
305 	},
306 	{
307 		/*
308 		 * SEAGRAND NP-900 MP3 Player
309 		 * PR: kern/64563
310 		 */
311 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "SEAGRAND", "NP-900*", "*"},
312 		/*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
313 	},
314 	{
315 		/*
316 		 * iRiver iFP MP3 player (with UMS Firmware)
317 		 * PR: kern/54881, i386/63941, kern/66124
318 		 */
319 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "iRiver", "iFP*", "*"},
320 		/*quirks*/ DA_Q_NO_SYNC_CACHE
321  	},
322 	{
323 		/*
324 		 * Frontier Labs NEX IA+ Digital Audio Player, rev 1.10/0.01
325 		 * PR: kern/70158
326 		 */
327 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "FL" , "Nex*", "*"},
328 		/*quirks*/ DA_Q_NO_SYNC_CACHE
329 	},
330 	{
331 		/*
332 		 * ZICPlay USB MP3 Player with FM
333 		 * PR: kern/75057
334 		 */
335 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "ACTIONS*" , "USB DISK*", "*"},
336 		/*quirks*/ DA_Q_NO_SYNC_CACHE
337 	},
338 	{
339 		/*
340 		 * TEAC USB floppy mechanisms
341 		 */
342 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "TEAC" , "FD-05*", "*"},
343 		/*quirks*/ DA_Q_NO_SYNC_CACHE
344 	},
345 	{
346 		/*
347 		 * Kingston DataTraveler II+ USB Pen-Drive.
348 		 * Reported by: Pawel Jakub Dawidek <pjd@FreeBSD.org>
349 		 */
350 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Kingston" , "DataTraveler II+",
351 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
352 	},
353 	{
354 		/*
355 		 * Motorola E398 Mobile Phone (TransFlash memory card).
356 		 * Reported by: Wojciech A. Koszek <dunstan@FreeBSD.czest.pl>
357 		 * PR: usb/89889
358 		 */
359 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Motorola" , "Motorola Phone",
360 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
361 	},
362 	{
363 		/*
364 		 * Qware BeatZkey! Pro
365 		 * PR: usb/79164
366 		 */
367 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "GENERIC", "USB DISK DEVICE",
368 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
369 	},
370 	{
371 		/*
372 		 * Time DPA20B 1GB MP3 Player
373 		 * PR: usb/81846
374 		 */
375 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "USB2.0*", "(FS) FLASH DISK*",
376 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
377 	},
378 	{
379 		/*
380 		 * Samsung USB key 128Mb
381 		 * PR: usb/90081
382 		 */
383 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "USB-DISK", "FreeDik-FlashUsb",
384 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
385 	},
386 	{
387 		/*
388 		 * Kingston DataTraveler 2.0 USB Flash memory.
389 		 * PR: usb/89196
390 		 */
391 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Kingston", "DataTraveler 2.0",
392 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
393 	},
394 	{
395 		/*
396 		 * Creative MUVO Slim mp3 player (USB)
397 		 * PR: usb/86131
398 		 */
399 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "MuVo Slim",
400 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
401 		},
402 	{
403 		/*
404 		 * United MP5512 Portable MP3 Player (2-in-1 USB DISK/MP3)
405 		 * PR: usb/80487
406 		 */
407 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Generic*", "MUSIC DISK",
408 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
409 	},
410 	{
411 		/*
412 		 * SanDisk Micro Cruzer 128MB
413 		 * PR: usb/75970
414 		 */
415 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "SanDisk" , "Micro Cruzer",
416 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
417 	},
418 	{
419 		/*
420 		 * TOSHIBA TransMemory USB sticks
421 		 * PR: kern/94660
422 		 */
423 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "TOSHIBA", "TransMemory",
424 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
425 	},
426 	{
427 		/*
428 		 * PNY USB Flash keys
429 		 * PR: usb/75578, usb/72344, usb/65436
430 		 */
431 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "*" , "USB DISK*",
432 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
433 	},
434 	{
435 		/*
436 		 * Genesys 6-in-1 Card Reader
437 		 * PR: usb/94647
438 		 */
439 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Generic*", "STORAGE DEVICE*",
440 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
441 	},
442 	{
443 		/*
444 		 * Rekam Digital CAMERA
445 		 * PR: usb/98713
446 		 */
447 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "CAMERA*", "4MP-9J6*",
448 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
449 	},
450 	{
451 		/*
452 		 * iRiver H10 MP3 player
453 		 * PR: usb/102547
454 		 */
455 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "iriver", "H10*",
456 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
457 	},
458 	{
459 		/*
460 		 * iRiver U10 MP3 player
461 		 * PR: usb/92306
462 		 */
463 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "iriver", "U10*",
464 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
465 	},
466 	{
467 		/*
468 		 * X-Micro Flash Disk
469 		 * PR: usb/96901
470 		 */
471 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "X-Micro", "Flash Disk",
472 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
473 	},
474 	{
475 		/*
476 		 * EasyMP3 EM732X USB 2.0 Flash MP3 Player
477 		 * PR: usb/96546
478 		 */
479 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "EM732X", "MP3 Player*",
480 		"1.00"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
481 	},
482 	{
483 		/*
484 		 * Denver MP3 player
485 		 * PR: usb/107101
486 		 */
487 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "DENVER", "MP3 PLAYER",
488 		 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
489 	},
490 	{
491 		/*
492 		 * Philips USB Key Audio KEY013
493 		 * PR: usb/68412
494 		 */
495 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "PHILIPS", "Key*", "*"},
496 		/*quirks*/ DA_Q_NO_SYNC_CACHE | DA_Q_NO_PREVENT
497 	},
498 	{
499 		/*
500 		 * JNC MP3 Player
501 		 * PR: usb/94439
502 		 */
503 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "JNC*" , "MP3 Player*",
504 		 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
505 	},
506 	{
507 		/*
508 		 * SAMSUNG MP0402H
509 		 * PR: usb/108427
510 		 */
511 		{T_DIRECT, SIP_MEDIA_FIXED, "SAMSUNG", "MP0402H", "*"},
512 		/*quirks*/ DA_Q_NO_SYNC_CACHE
513 	},
514 	{
515 		/*
516 		 * I/O Magic USB flash - Giga Bank
517 		 * PR: usb/108810
518 		 */
519 		{T_DIRECT, SIP_MEDIA_FIXED, "GS-Magic", "stor*", "*"},
520 		/*quirks*/ DA_Q_NO_SYNC_CACHE
521 	},
522 	{
523 		/*
524 		 * JoyFly 128mb USB Flash Drive
525 		 * PR: 96133
526 		 */
527 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "USB 2.0", "Flash Disk*",
528 		 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
529 	},
530 	{
531 		/*
532 		 * ChipsBnk usb stick
533 		 * PR: 103702
534 		 */
535 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "ChipsBnk", "USB*",
536 		 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
537 	},
538 	{
539 		/*
540 		 * Samsung YP-U3 mp3-player
541 		 * PR: 125398
542 		 */
543 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Samsung", "YP-U3",
544 		 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
545 	},
546 	{
547 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Netac", "OnlyDisk*",
548 		 "2000"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
549 	}
550 };
551 
552 static	disk_strategy_t	dastrategy;
553 static	dumper_t	dadump;
554 static	periph_init_t	dainit;
555 static	void		daasync(void *callback_arg, u_int32_t code,
556 				struct cam_path *path, void *arg);
557 static	void		dasysctlinit(void *context, int pending);
558 static	int		dacmdsizesysctl(SYSCTL_HANDLER_ARGS);
559 static	periph_ctor_t	daregister;
560 static	periph_dtor_t	dacleanup;
561 static	periph_start_t	dastart;
562 static	periph_oninv_t	daoninvalidate;
563 static	void		dadone(struct cam_periph *periph,
564 			       union ccb *done_ccb);
565 static  int		daerror(union ccb *ccb, u_int32_t cam_flags,
566 				u_int32_t sense_flags);
567 static void		daprevent(struct cam_periph *periph, int action);
568 static int		dagetcapacity(struct cam_periph *periph);
569 static void		dasetgeom(struct cam_periph *periph, uint32_t block_len,
570 				  uint64_t maxsector);
571 static timeout_t	dasendorderedtag;
572 static void		dashutdown(void *arg, int howto);
573 
574 #ifndef DA_DEFAULT_TIMEOUT
575 #define DA_DEFAULT_TIMEOUT 60	/* Timeout in seconds */
576 #endif
577 
578 #ifndef	DA_DEFAULT_RETRY
579 #define	DA_DEFAULT_RETRY	4
580 #endif
581 
582 #ifndef	DA_DEFAULT_SEND_ORDERED
583 #define	DA_DEFAULT_SEND_ORDERED	1
584 #endif
585 
586 
587 static int da_retry_count = DA_DEFAULT_RETRY;
588 static int da_default_timeout = DA_DEFAULT_TIMEOUT;
589 static int da_send_ordered = DA_DEFAULT_SEND_ORDERED;
590 
591 SYSCTL_NODE(_kern_cam, OID_AUTO, da, CTLFLAG_RD, 0,
592             "CAM Direct Access Disk driver");
593 SYSCTL_INT(_kern_cam_da, OID_AUTO, retry_count, CTLFLAG_RW,
594            &da_retry_count, 0, "Normal I/O retry count");
595 TUNABLE_INT("kern.cam.da.retry_count", &da_retry_count);
596 SYSCTL_INT(_kern_cam_da, OID_AUTO, default_timeout, CTLFLAG_RW,
597            &da_default_timeout, 0, "Normal I/O timeout (in seconds)");
598 TUNABLE_INT("kern.cam.da.default_timeout", &da_default_timeout);
599 SYSCTL_INT(_kern_cam_da, OID_AUTO, da_send_ordered, CTLFLAG_RW,
600            &da_send_ordered, 0, "Send Ordered Tags");
601 TUNABLE_INT("kern.cam.da.da_send_ordered", &da_send_ordered);
602 
603 /*
604  * DA_ORDEREDTAG_INTERVAL determines how often, relative
605  * to the default timeout, we check to see whether an ordered
606  * tagged transaction is appropriate to prevent simple tag
607  * starvation.  Since we'd like to ensure that there is at least
608  * 1/2 of the timeout length left for a starved transaction to
609  * complete after we've sent an ordered tag, we must poll at least
610  * four times in every timeout period.  This takes care of the worst
611  * case where a starved transaction starts during an interval that
612  * meets the requirement "don't send an ordered tag" test so it takes
613  * us two intervals to determine that a tag must be sent.
614  */
615 #ifndef DA_ORDEREDTAG_INTERVAL
616 #define DA_ORDEREDTAG_INTERVAL 4
617 #endif
618 
619 static struct periph_driver dadriver =
620 {
621 	dainit, "da",
622 	TAILQ_HEAD_INITIALIZER(dadriver.units), /* generation */ 0
623 };
624 
625 PERIPHDRIVER_DECLARE(da, dadriver);
626 
627 MALLOC_DEFINE(M_SCSIDA, "scsi_da", "scsi_da buffers");
628 
629 static int
630 daopen(struct disk *dp)
631 {
632 	struct cam_periph *periph;
633 	struct da_softc *softc;
634 	int unit;
635 	int error;
636 
637 	periph = (struct cam_periph *)dp->d_drv1;
638 	if (periph == NULL) {
639 		return (ENXIO);
640 	}
641 
642 	if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
643 		return(ENXIO);
644 	}
645 
646 	cam_periph_lock(periph);
647 	if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) {
648 		cam_periph_unlock(periph);
649 		cam_periph_release(periph);
650 		return (error);
651 	}
652 
653 	unit = periph->unit_number;
654 	softc = (struct da_softc *)periph->softc;
655 	softc->flags |= DA_FLAG_OPEN;
656 
657 	CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
658 	    ("daopen: disk=%s%d (unit %d)\n", dp->d_name, dp->d_unit,
659 	     unit));
660 
661 	if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
662 		/* Invalidate our pack information. */
663 		softc->flags &= ~DA_FLAG_PACK_INVALID;
664 	}
665 
666 	error = dagetcapacity(periph);
667 
668 	if (error == 0) {
669 
670 		softc->disk->d_sectorsize = softc->params.secsize;
671 		softc->disk->d_mediasize = softc->params.secsize * (off_t)softc->params.sectors;
672 		/* XXX: these are not actually "firmware" values, so they may be wrong */
673 		softc->disk->d_fwsectors = softc->params.secs_per_track;
674 		softc->disk->d_fwheads = softc->params.heads;
675 		softc->disk->d_devstat->block_size = softc->params.secsize;
676 		softc->disk->d_devstat->flags &= ~DEVSTAT_BS_UNAVAILABLE;
677 	}
678 
679 	if (error == 0) {
680 		if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0 &&
681 		    (softc->quirks & DA_Q_NO_PREVENT) == 0)
682 			daprevent(periph, PR_PREVENT);
683 	} else {
684 		softc->flags &= ~DA_FLAG_OPEN;
685 		cam_periph_release(periph);
686 	}
687 	cam_periph_unhold(periph);
688 	cam_periph_unlock(periph);
689 	return (error);
690 }
691 
692 static int
693 daclose(struct disk *dp)
694 {
695 	struct	cam_periph *periph;
696 	struct	da_softc *softc;
697 	int error;
698 
699 	periph = (struct cam_periph *)dp->d_drv1;
700 	if (periph == NULL)
701 		return (ENXIO);
702 
703 	cam_periph_lock(periph);
704 	if ((error = cam_periph_hold(periph, PRIBIO)) != 0) {
705 		cam_periph_unlock(periph);
706 		cam_periph_release(periph);
707 		return (error);
708 	}
709 
710 	softc = (struct da_softc *)periph->softc;
711 
712 	if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
713 		union	ccb *ccb;
714 
715 		ccb = cam_periph_getccb(periph, /*priority*/1);
716 
717 		scsi_synchronize_cache(&ccb->csio,
718 				       /*retries*/1,
719 				       /*cbfcnp*/dadone,
720 				       MSG_SIMPLE_Q_TAG,
721 				       /*begin_lba*/0,/* Cover the whole disk */
722 				       /*lb_count*/0,
723 				       SSD_FULL_SIZE,
724 				       5 * 60 * 1000);
725 
726 		cam_periph_runccb(ccb, /*error_routine*/NULL, /*cam_flags*/0,
727 				  /*sense_flags*/SF_RETRY_UA,
728 				  softc->disk->d_devstat);
729 
730 		if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
731 			if ((ccb->ccb_h.status & CAM_STATUS_MASK) ==
732 			     CAM_SCSI_STATUS_ERROR) {
733 				int asc, ascq;
734 				int sense_key, error_code;
735 
736 				scsi_extract_sense(&ccb->csio.sense_data,
737 						   &error_code,
738 						   &sense_key,
739 						   &asc, &ascq);
740 				if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
741 					scsi_sense_print(&ccb->csio);
742 			} else {
743 				xpt_print(periph->path, "Synchronize cache "
744 				    "failed, status == 0x%x, scsi status == "
745 				    "0x%x\n", ccb->csio.ccb_h.status,
746 				    ccb->csio.scsi_status);
747 			}
748 		}
749 
750 		if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
751 			cam_release_devq(ccb->ccb_h.path,
752 					 /*relsim_flags*/0,
753 					 /*reduction*/0,
754 					 /*timeout*/0,
755 					 /*getcount_only*/0);
756 
757 		xpt_release_ccb(ccb);
758 
759 	}
760 
761 	if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0) {
762 		if ((softc->quirks & DA_Q_NO_PREVENT) == 0)
763 			daprevent(periph, PR_ALLOW);
764 		/*
765 		 * If we've got removeable media, mark the blocksize as
766 		 * unavailable, since it could change when new media is
767 		 * inserted.
768 		 */
769 		softc->disk->d_devstat->flags |= DEVSTAT_BS_UNAVAILABLE;
770 	}
771 
772 	softc->flags &= ~DA_FLAG_OPEN;
773 	cam_periph_unhold(periph);
774 	cam_periph_release(periph);
775 	cam_periph_unlock(periph);
776 	return (0);
777 }
778 
779 /*
780  * Actually translate the requested transfer into one the physical driver
781  * can understand.  The transfer is described by a buf and will include
782  * only one physical transfer.
783  */
784 static void
785 dastrategy(struct bio *bp)
786 {
787 	struct cam_periph *periph;
788 	struct da_softc *softc;
789 
790 	periph = (struct cam_periph *)bp->bio_disk->d_drv1;
791 	if (periph == NULL) {
792 		biofinish(bp, NULL, ENXIO);
793 		return;
794 	}
795 	softc = (struct da_softc *)periph->softc;
796 
797 	cam_periph_lock(periph);
798 
799 #if 0
800 	/*
801 	 * check it's not too big a transfer for our adapter
802 	 */
803 	scsi_minphys(bp,&sd_switch);
804 #endif
805 
806 	/*
807 	 * Mask interrupts so that the pack cannot be invalidated until
808 	 * after we are in the queue.  Otherwise, we might not properly
809 	 * clean up one of the buffers.
810 	 */
811 
812 	/*
813 	 * If the device has been made invalid, error out
814 	 */
815 	if ((softc->flags & DA_FLAG_PACK_INVALID)) {
816 		cam_periph_unlock(periph);
817 		biofinish(bp, NULL, ENXIO);
818 		return;
819 	}
820 
821 	/*
822 	 * Place it in the queue of disk activities for this disk
823 	 */
824 	bioq_disksort(&softc->bio_queue, bp);
825 
826 	/*
827 	 * Schedule ourselves for performing the work.
828 	 */
829 	xpt_schedule(periph, /* XXX priority */1);
830 	cam_periph_unlock(periph);
831 
832 	return;
833 }
834 
835 static int
836 dadump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
837 {
838 	struct	    cam_periph *periph;
839 	struct	    da_softc *softc;
840 	u_int	    secsize;
841 	struct	    ccb_scsiio csio;
842 	struct	    disk *dp;
843 
844 	dp = arg;
845 	periph = dp->d_drv1;
846 	if (periph == NULL)
847 		return (ENXIO);
848 	softc = (struct da_softc *)periph->softc;
849 	cam_periph_lock(periph);
850 	secsize = softc->params.secsize;
851 
852 	if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
853 		cam_periph_unlock(periph);
854 		return (ENXIO);
855 	}
856 
857 	if (length > 0) {
858 		periph->flags |= CAM_PERIPH_POLLED;
859 		xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
860 		csio.ccb_h.ccb_state = DA_CCB_DUMP;
861 		scsi_read_write(&csio,
862 				/*retries*/1,
863 				dadone,
864 				MSG_ORDERED_Q_TAG,
865 				/*read*/FALSE,
866 				/*byte2*/0,
867 				/*minimum_cmd_size*/ softc->minimum_cmd_size,
868 				offset / secsize,
869 				length / secsize,
870 				/*data_ptr*/(u_int8_t *) virtual,
871 				/*dxfer_len*/length,
872 				/*sense_len*/SSD_FULL_SIZE,
873 				DA_DEFAULT_TIMEOUT * 1000);
874 		xpt_polled_action((union ccb *)&csio);
875 
876 		if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
877 			printf("Aborting dump due to I/O error.\n");
878 			if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
879 			     CAM_SCSI_STATUS_ERROR)
880 				scsi_sense_print(&csio);
881 			else
882 				printf("status == 0x%x, scsi status == 0x%x\n",
883 				       csio.ccb_h.status, csio.scsi_status);
884 			periph->flags |= CAM_PERIPH_POLLED;
885 			return(EIO);
886 		}
887 		cam_periph_unlock(periph);
888 		return(0);
889 	}
890 
891 	/*
892 	 * Sync the disk cache contents to the physical media.
893 	 */
894 	if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
895 
896 		xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
897 		csio.ccb_h.ccb_state = DA_CCB_DUMP;
898 		scsi_synchronize_cache(&csio,
899 				       /*retries*/1,
900 				       /*cbfcnp*/dadone,
901 				       MSG_SIMPLE_Q_TAG,
902 				       /*begin_lba*/0,/* Cover the whole disk */
903 				       /*lb_count*/0,
904 				       SSD_FULL_SIZE,
905 				       5 * 60 * 1000);
906 		xpt_polled_action((union ccb *)&csio);
907 
908 		if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
909 			if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
910 			     CAM_SCSI_STATUS_ERROR) {
911 				int asc, ascq;
912 				int sense_key, error_code;
913 
914 				scsi_extract_sense(&csio.sense_data,
915 						   &error_code,
916 						   &sense_key,
917 						   &asc, &ascq);
918 				if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
919 					scsi_sense_print(&csio);
920 			} else {
921 				xpt_print(periph->path, "Synchronize cache "
922 				    "failed, status == 0x%x, scsi status == "
923 				    "0x%x\n", csio.ccb_h.status,
924 				    csio.scsi_status);
925 			}
926 		}
927 	}
928 	periph->flags &= ~CAM_PERIPH_POLLED;
929 	cam_periph_unlock(periph);
930 	return (0);
931 }
932 
933 static void
934 dainit(void)
935 {
936 	cam_status status;
937 
938 	/*
939 	 * Install a global async callback.  This callback will
940 	 * receive async callbacks like "new device found".
941 	 */
942 	status = xpt_register_async(AC_FOUND_DEVICE, daasync, NULL, NULL);
943 
944 	if (status != CAM_REQ_CMP) {
945 		printf("da: Failed to attach master async callback "
946 		       "due to status 0x%x!\n", status);
947 	} else if (da_send_ordered) {
948 
949 		/* Register our shutdown event handler */
950 		if ((EVENTHANDLER_REGISTER(shutdown_post_sync, dashutdown,
951 					   NULL, SHUTDOWN_PRI_DEFAULT)) == NULL)
952 		    printf("dainit: shutdown event registration failed!\n");
953 	}
954 }
955 
956 static void
957 daoninvalidate(struct cam_periph *periph)
958 {
959 	struct da_softc *softc;
960 
961 	softc = (struct da_softc *)periph->softc;
962 
963 	/*
964 	 * De-register any async callbacks.
965 	 */
966 	xpt_register_async(0, daasync, periph, periph->path);
967 
968 	softc->flags |= DA_FLAG_PACK_INVALID;
969 
970 	/*
971 	 * Return all queued I/O with ENXIO.
972 	 * XXX Handle any transactions queued to the card
973 	 *     with XPT_ABORT_CCB.
974 	 */
975 	bioq_flush(&softc->bio_queue, NULL, ENXIO);
976 
977 	disk_gone(softc->disk);
978 	xpt_print(periph->path, "lost device\n");
979 }
980 
981 static void
982 dacleanup(struct cam_periph *periph)
983 {
984 	struct da_softc *softc;
985 
986 	softc = (struct da_softc *)periph->softc;
987 
988 	xpt_print(periph->path, "removing device entry\n");
989 	/*
990 	 * If we can't free the sysctl tree, oh well...
991 	 */
992 	if ((softc->flags & DA_FLAG_SCTX_INIT) != 0
993 	    && sysctl_ctx_free(&softc->sysctl_ctx) != 0) {
994 		xpt_print(periph->path, "can't remove sysctl context\n");
995 	}
996 
997 	cam_periph_unlock(periph);
998 	disk_destroy(softc->disk);
999 	callout_drain(&softc->sendordered_c);
1000 	cam_periph_lock(periph);
1001 	free(softc, M_DEVBUF);
1002 }
1003 
1004 static void
1005 daasync(void *callback_arg, u_int32_t code,
1006 	struct cam_path *path, void *arg)
1007 {
1008 	struct cam_periph *periph;
1009 
1010 	periph = (struct cam_periph *)callback_arg;
1011 	switch (code) {
1012 	case AC_FOUND_DEVICE:
1013 	{
1014 		struct ccb_getdev *cgd;
1015 		struct cam_sim *sim;
1016 		cam_status status;
1017 
1018 		cgd = (struct ccb_getdev *)arg;
1019 		if (cgd == NULL)
1020 			break;
1021 
1022 		if (SID_TYPE(&cgd->inq_data) != T_DIRECT
1023 		    && SID_TYPE(&cgd->inq_data) != T_RBC
1024 		    && SID_TYPE(&cgd->inq_data) != T_OPTICAL)
1025 			break;
1026 
1027 		/*
1028 		 * Allocate a peripheral instance for
1029 		 * this device and start the probe
1030 		 * process.
1031 		 */
1032 		sim = xpt_path_sim(cgd->ccb_h.path);
1033 		status = cam_periph_alloc(daregister, daoninvalidate,
1034 					  dacleanup, dastart,
1035 					  "da", CAM_PERIPH_BIO,
1036 					  cgd->ccb_h.path, daasync,
1037 					  AC_FOUND_DEVICE, cgd);
1038 
1039 		if (status != CAM_REQ_CMP
1040 		 && status != CAM_REQ_INPROG)
1041 			printf("daasync: Unable to attach to new device "
1042 				"due to status 0x%x\n", status);
1043 		break;
1044 	}
1045 	case AC_SENT_BDR:
1046 	case AC_BUS_RESET:
1047 	{
1048 		struct da_softc *softc;
1049 		struct ccb_hdr *ccbh;
1050 
1051 		softc = (struct da_softc *)periph->softc;
1052 		/*
1053 		 * Don't fail on the expected unit attention
1054 		 * that will occur.
1055 		 */
1056 		softc->flags |= DA_FLAG_RETRY_UA;
1057 		LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le)
1058 			ccbh->ccb_state |= DA_CCB_RETRY_UA;
1059 		/* FALLTHROUGH*/
1060 	}
1061 	default:
1062 		cam_periph_async(periph, code, path, arg);
1063 		break;
1064 	}
1065 }
1066 
1067 static void
1068 dasysctlinit(void *context, int pending)
1069 {
1070 	struct cam_periph *periph;
1071 	struct da_softc *softc;
1072 	char tmpstr[80], tmpstr2[80];
1073 
1074 	periph = (struct cam_periph *)context;
1075 	if (cam_periph_acquire(periph) != CAM_REQ_CMP)
1076 		return;
1077 
1078 	softc = (struct da_softc *)periph->softc;
1079 	snprintf(tmpstr, sizeof(tmpstr), "CAM DA unit %d", periph->unit_number);
1080 	snprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number);
1081 
1082 	mtx_lock(&Giant);
1083 	sysctl_ctx_init(&softc->sysctl_ctx);
1084 	softc->flags |= DA_FLAG_SCTX_INIT;
1085 	softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
1086 		SYSCTL_STATIC_CHILDREN(_kern_cam_da), OID_AUTO, tmpstr2,
1087 		CTLFLAG_RD, 0, tmpstr);
1088 	if (softc->sysctl_tree == NULL) {
1089 		printf("dasysctlinit: unable to allocate sysctl tree\n");
1090 		mtx_unlock(&Giant);
1091 		cam_periph_release(periph);
1092 		return;
1093 	}
1094 
1095 	/*
1096 	 * Now register the sysctl handler, so the user can the value on
1097 	 * the fly.
1098 	 */
1099 	SYSCTL_ADD_PROC(&softc->sysctl_ctx,SYSCTL_CHILDREN(softc->sysctl_tree),
1100 		OID_AUTO, "minimum_cmd_size", CTLTYPE_INT | CTLFLAG_RW,
1101 		&softc->minimum_cmd_size, 0, dacmdsizesysctl, "I",
1102 		"Minimum CDB size");
1103 
1104 	mtx_unlock(&Giant);
1105 	cam_periph_release(periph);
1106 }
1107 
1108 static int
1109 dacmdsizesysctl(SYSCTL_HANDLER_ARGS)
1110 {
1111 	int error, value;
1112 
1113 	value = *(int *)arg1;
1114 
1115 	error = sysctl_handle_int(oidp, &value, 0, req);
1116 
1117 	if ((error != 0)
1118 	 || (req->newptr == NULL))
1119 		return (error);
1120 
1121 	/*
1122 	 * Acceptable values here are 6, 10, 12 or 16.
1123 	 */
1124 	if (value < 6)
1125 		value = 6;
1126 	else if ((value > 6)
1127 	      && (value <= 10))
1128 		value = 10;
1129 	else if ((value > 10)
1130 	      && (value <= 12))
1131 		value = 12;
1132 	else if (value > 12)
1133 		value = 16;
1134 
1135 	*(int *)arg1 = value;
1136 
1137 	return (0);
1138 }
1139 
1140 static cam_status
1141 daregister(struct cam_periph *periph, void *arg)
1142 {
1143 	struct da_softc *softc;
1144 	struct ccb_pathinq cpi;
1145 	struct ccb_getdev *cgd;
1146 	char tmpstr[80];
1147 	caddr_t match;
1148 
1149 	cgd = (struct ccb_getdev *)arg;
1150 	if (periph == NULL) {
1151 		printf("daregister: periph was NULL!!\n");
1152 		return(CAM_REQ_CMP_ERR);
1153 	}
1154 
1155 	if (cgd == NULL) {
1156 		printf("daregister: no getdev CCB, can't register device\n");
1157 		return(CAM_REQ_CMP_ERR);
1158 	}
1159 
1160 	softc = (struct da_softc *)malloc(sizeof(*softc), M_DEVBUF,
1161 	    M_NOWAIT|M_ZERO);
1162 
1163 	if (softc == NULL) {
1164 		printf("daregister: Unable to probe new device. "
1165 		       "Unable to allocate softc\n");
1166 		return(CAM_REQ_CMP_ERR);
1167 	}
1168 
1169 	LIST_INIT(&softc->pending_ccbs);
1170 	softc->state = DA_STATE_PROBE;
1171 	bioq_init(&softc->bio_queue);
1172 	if (SID_IS_REMOVABLE(&cgd->inq_data))
1173 		softc->flags |= DA_FLAG_PACK_REMOVABLE;
1174 	if ((cgd->inq_data.flags & SID_CmdQue) != 0)
1175 		softc->flags |= DA_FLAG_TAGGED_QUEUING;
1176 
1177 	periph->softc = softc;
1178 
1179 	/*
1180 	 * See if this device has any quirks.
1181 	 */
1182 	match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1183 			       (caddr_t)da_quirk_table,
1184 			       sizeof(da_quirk_table)/sizeof(*da_quirk_table),
1185 			       sizeof(*da_quirk_table), scsi_inquiry_match);
1186 
1187 	if (match != NULL)
1188 		softc->quirks = ((struct da_quirk_entry *)match)->quirks;
1189 	else
1190 		softc->quirks = DA_Q_NONE;
1191 
1192 	/* Check if the SIM does not want 6 byte commands */
1193 	xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
1194 	cpi.ccb_h.func_code = XPT_PATH_INQ;
1195 	xpt_action((union ccb *)&cpi);
1196 	if (cpi.ccb_h.status == CAM_REQ_CMP && (cpi.hba_misc & PIM_NO_6_BYTE))
1197 		softc->quirks |= DA_Q_NO_6_BYTE;
1198 
1199 	TASK_INIT(&softc->sysctl_task, 0, dasysctlinit, periph);
1200 
1201 	/*
1202 	 * RBC devices don't have to support READ(6), only READ(10).
1203 	 */
1204 	if (softc->quirks & DA_Q_NO_6_BYTE || SID_TYPE(&cgd->inq_data) == T_RBC)
1205 		softc->minimum_cmd_size = 10;
1206 	else
1207 		softc->minimum_cmd_size = 6;
1208 
1209 	/*
1210 	 * Load the user's default, if any.
1211 	 */
1212 	snprintf(tmpstr, sizeof(tmpstr), "kern.cam.da.%d.minimum_cmd_size",
1213 		 periph->unit_number);
1214 	TUNABLE_INT_FETCH(tmpstr, &softc->minimum_cmd_size);
1215 
1216 	/*
1217 	 * 6, 10, 12 and 16 are the currently permissible values.
1218 	 */
1219 	if (softc->minimum_cmd_size < 6)
1220 		softc->minimum_cmd_size = 6;
1221 	else if ((softc->minimum_cmd_size > 6)
1222 	      && (softc->minimum_cmd_size <= 10))
1223 		softc->minimum_cmd_size = 10;
1224 	else if ((softc->minimum_cmd_size > 10)
1225 	      && (softc->minimum_cmd_size <= 12))
1226 		softc->minimum_cmd_size = 12;
1227 	else if (softc->minimum_cmd_size > 12)
1228 		softc->minimum_cmd_size = 16;
1229 
1230 	/*
1231 	 * Register this media as a disk
1232 	 */
1233 
1234 	mtx_unlock(periph->sim->mtx);
1235 	softc->disk = disk_alloc();
1236 	softc->disk->d_open = daopen;
1237 	softc->disk->d_close = daclose;
1238 	softc->disk->d_strategy = dastrategy;
1239 	softc->disk->d_dump = dadump;
1240 	softc->disk->d_name = "da";
1241 	softc->disk->d_drv1 = periph;
1242 	softc->disk->d_maxsize = DFLTPHYS; /* XXX: probably not arbitrary */
1243 	softc->disk->d_unit = periph->unit_number;
1244 	softc->disk->d_flags = 0;
1245 	if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0)
1246 		softc->disk->d_flags |= DISKFLAG_CANFLUSHCACHE;
1247 	disk_create(softc->disk, DISK_VERSION);
1248 	mtx_lock(periph->sim->mtx);
1249 
1250 	/*
1251 	 * Add async callbacks for bus reset and
1252 	 * bus device reset calls.  I don't bother
1253 	 * checking if this fails as, in most cases,
1254 	 * the system will function just fine without
1255 	 * them and the only alternative would be to
1256 	 * not attach the device on failure.
1257 	 */
1258 	xpt_register_async(AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE,
1259 			   daasync, periph, periph->path);
1260 
1261 	/*
1262 	 * Take an exclusive refcount on the periph while dastart is called
1263 	 * to finish the probe.  The reference will be dropped in dadone at
1264 	 * the end of probe.
1265 	 */
1266 	(void)cam_periph_hold(periph, PRIBIO);
1267 	xpt_schedule(periph, /*priority*/5);
1268 
1269 	/*
1270 	 * Schedule a periodic event to occasionally send an
1271 	 * ordered tag to a device.
1272 	 */
1273 	callout_init_mtx(&softc->sendordered_c, periph->sim->mtx, 0);
1274 	callout_reset(&softc->sendordered_c,
1275 	    (DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL,
1276 	    dasendorderedtag, softc);
1277 
1278 	return(CAM_REQ_CMP);
1279 }
1280 
1281 static void
1282 dastart(struct cam_periph *periph, union ccb *start_ccb)
1283 {
1284 	struct da_softc *softc;
1285 
1286 	softc = (struct da_softc *)periph->softc;
1287 
1288 	switch (softc->state) {
1289 	case DA_STATE_NORMAL:
1290 	{
1291 		/* Pull a buffer from the queue and get going on it */
1292 		struct bio *bp;
1293 
1294 		/*
1295 		 * See if there is a buf with work for us to do..
1296 		 */
1297 		bp = bioq_first(&softc->bio_queue);
1298 		if (periph->immediate_priority <= periph->pinfo.priority) {
1299 			CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1300 					("queuing for immediate ccb\n"));
1301 			start_ccb->ccb_h.ccb_state = DA_CCB_WAITING;
1302 			SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1303 					  periph_links.sle);
1304 			periph->immediate_priority = CAM_PRIORITY_NONE;
1305 			wakeup(&periph->ccb_list);
1306 		} else if (bp == NULL) {
1307 			xpt_release_ccb(start_ccb);
1308 		} else {
1309 			u_int8_t tag_code;
1310 
1311 			bioq_remove(&softc->bio_queue, bp);
1312 
1313 			if ((softc->flags & DA_FLAG_NEED_OTAG) != 0) {
1314 				softc->flags &= ~DA_FLAG_NEED_OTAG;
1315 				softc->ordered_tag_count++;
1316 				tag_code = MSG_ORDERED_Q_TAG;
1317 			} else {
1318 				tag_code = MSG_SIMPLE_Q_TAG;
1319 			}
1320 			switch (bp->bio_cmd) {
1321 			case BIO_READ:
1322 			case BIO_WRITE:
1323 				scsi_read_write(&start_ccb->csio,
1324 						/*retries*/da_retry_count,
1325 						/*cbfcnp*/dadone,
1326 						/*tag_action*/tag_code,
1327 						/*read_op*/bp->bio_cmd == BIO_READ,
1328 						/*byte2*/0,
1329 						softc->minimum_cmd_size,
1330 						/*lba*/bp->bio_pblkno,
1331 						/*block_count*/bp->bio_bcount /
1332 						softc->params.secsize,
1333 						/*data_ptr*/ bp->bio_data,
1334 						/*dxfer_len*/ bp->bio_bcount,
1335 						/*sense_len*/SSD_FULL_SIZE,
1336 						/*timeout*/da_default_timeout*1000);
1337 				break;
1338 			case BIO_FLUSH:
1339 				scsi_synchronize_cache(&start_ccb->csio,
1340 						       /*retries*/1,
1341 						       /*cbfcnp*/dadone,
1342 						       MSG_SIMPLE_Q_TAG,
1343 						       /*begin_lba*/0,/* Cover the whole disk */
1344 						       /*lb_count*/0,
1345 						       SSD_FULL_SIZE,
1346 						       /*timeout*/da_default_timeout*1000);
1347 				break;
1348 			}
1349 			start_ccb->ccb_h.ccb_state = DA_CCB_BUFFER_IO;
1350 
1351 			/*
1352 			 * Block out any asyncronous callbacks
1353 			 * while we touch the pending ccb list.
1354 			 */
1355 			LIST_INSERT_HEAD(&softc->pending_ccbs,
1356 					 &start_ccb->ccb_h, periph_links.le);
1357 			softc->outstanding_cmds++;
1358 
1359 			/* We expect a unit attention from this device */
1360 			if ((softc->flags & DA_FLAG_RETRY_UA) != 0) {
1361 				start_ccb->ccb_h.ccb_state |= DA_CCB_RETRY_UA;
1362 				softc->flags &= ~DA_FLAG_RETRY_UA;
1363 			}
1364 
1365 			start_ccb->ccb_h.ccb_bp = bp;
1366 			bp = bioq_first(&softc->bio_queue);
1367 
1368 			xpt_action(start_ccb);
1369 		}
1370 
1371 		if (bp != NULL) {
1372 			/* Have more work to do, so ensure we stay scheduled */
1373 			xpt_schedule(periph, /* XXX priority */1);
1374 		}
1375 		break;
1376 	}
1377 	case DA_STATE_PROBE:
1378 	{
1379 		struct ccb_scsiio *csio;
1380 		struct scsi_read_capacity_data *rcap;
1381 
1382 		rcap = (struct scsi_read_capacity_data *)
1383 		    malloc(sizeof(*rcap), M_SCSIDA, M_NOWAIT|M_ZERO);
1384 		if (rcap == NULL) {
1385 			printf("dastart: Couldn't malloc read_capacity data\n");
1386 			/* da_free_periph??? */
1387 			break;
1388 		}
1389 		csio = &start_ccb->csio;
1390 		scsi_read_capacity(csio,
1391 				   /*retries*/4,
1392 				   dadone,
1393 				   MSG_SIMPLE_Q_TAG,
1394 				   rcap,
1395 				   SSD_FULL_SIZE,
1396 				   /*timeout*/5000);
1397 		start_ccb->ccb_h.ccb_bp = NULL;
1398 		start_ccb->ccb_h.ccb_state = DA_CCB_PROBE;
1399 		xpt_action(start_ccb);
1400 		break;
1401 	}
1402 	case DA_STATE_PROBE2:
1403 	{
1404 		struct ccb_scsiio *csio;
1405 		struct scsi_read_capacity_data_long *rcaplong;
1406 
1407 		rcaplong = (struct scsi_read_capacity_data_long *)
1408 			malloc(sizeof(*rcaplong), M_SCSIDA, M_NOWAIT|M_ZERO);
1409 		if (rcaplong == NULL) {
1410 			printf("dastart: Couldn't malloc read_capacity data\n");
1411 			/* da_free_periph??? */
1412 			break;
1413 		}
1414 		csio = &start_ccb->csio;
1415 		scsi_read_capacity_16(csio,
1416 				      /*retries*/ 4,
1417 				      /*cbfcnp*/ dadone,
1418 				      /*tag_action*/ MSG_SIMPLE_Q_TAG,
1419 				      /*lba*/ 0,
1420 				      /*reladr*/ 0,
1421 				      /*pmi*/ 0,
1422 				      rcaplong,
1423 				      /*sense_len*/ SSD_FULL_SIZE,
1424 				      /*timeout*/ 60000);
1425 		start_ccb->ccb_h.ccb_bp = NULL;
1426 		start_ccb->ccb_h.ccb_state = DA_CCB_PROBE2;
1427 		xpt_action(start_ccb);
1428 		break;
1429 	}
1430 	}
1431 }
1432 
1433 static int
1434 cmd6workaround(union ccb *ccb)
1435 {
1436 	struct scsi_rw_6 cmd6;
1437 	struct scsi_rw_10 *cmd10;
1438 	struct da_softc *softc;
1439 	u_int8_t *cdb;
1440 	int frozen;
1441 
1442 	cdb = ccb->csio.cdb_io.cdb_bytes;
1443 
1444 	/* Translation only possible if CDB is an array and cmd is R/W6 */
1445 	if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0 ||
1446 	    (*cdb != READ_6 && *cdb != WRITE_6))
1447 		return 0;
1448 
1449 	xpt_print(ccb->ccb_h.path, "READ(6)/WRITE(6) not supported, "
1450 	    "increasing minimum_cmd_size to 10.\n");
1451  	softc = (struct da_softc *)xpt_path_periph(ccb->ccb_h.path)->softc;
1452 	softc->minimum_cmd_size = 10;
1453 
1454 	bcopy(cdb, &cmd6, sizeof(struct scsi_rw_6));
1455 	cmd10 = (struct scsi_rw_10 *)cdb;
1456 	cmd10->opcode = (cmd6.opcode == READ_6) ? READ_10 : WRITE_10;
1457 	cmd10->byte2 = 0;
1458 	scsi_ulto4b(scsi_3btoul(cmd6.addr), cmd10->addr);
1459 	cmd10->reserved = 0;
1460 	scsi_ulto2b(cmd6.length, cmd10->length);
1461 	cmd10->control = cmd6.control;
1462 	ccb->csio.cdb_len = sizeof(*cmd10);
1463 
1464 	/* Requeue request, unfreezing queue if necessary */
1465 	frozen = (ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
1466  	ccb->ccb_h.status = CAM_REQUEUE_REQ;
1467 	xpt_action(ccb);
1468 	if (frozen) {
1469 		cam_release_devq(ccb->ccb_h.path,
1470 				 /*relsim_flags*/0,
1471 				 /*reduction*/0,
1472 				 /*timeout*/0,
1473 				 /*getcount_only*/0);
1474 	}
1475 	return (ERESTART);
1476 }
1477 
1478 static void
1479 dadone(struct cam_periph *periph, union ccb *done_ccb)
1480 {
1481 	struct da_softc *softc;
1482 	struct ccb_scsiio *csio;
1483 
1484 	softc = (struct da_softc *)periph->softc;
1485 	csio = &done_ccb->csio;
1486 	switch (csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) {
1487 	case DA_CCB_BUFFER_IO:
1488 	{
1489 		struct bio *bp;
1490 
1491 		bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
1492 		if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1493 			int error;
1494 			int sf;
1495 
1496 			if ((csio->ccb_h.ccb_state & DA_CCB_RETRY_UA) != 0)
1497 				sf = SF_RETRY_UA;
1498 			else
1499 				sf = 0;
1500 
1501 			error = daerror(done_ccb, CAM_RETRY_SELTO, sf);
1502 			if (error == ERESTART) {
1503 				/*
1504 				 * A retry was scheuled, so
1505 				 * just return.
1506 				 */
1507 				return;
1508 			}
1509 			if (error != 0) {
1510 
1511 				if (error == ENXIO) {
1512 					/*
1513 					 * Catastrophic error.  Mark our pack as
1514 					 * invalid.
1515 					 */
1516 					/*
1517 					 * XXX See if this is really a media
1518 					 * XXX change first?
1519 					 */
1520 					xpt_print(periph->path,
1521 					    "Invalidating pack\n");
1522 					softc->flags |= DA_FLAG_PACK_INVALID;
1523 				}
1524 
1525 				/*
1526 				 * return all queued I/O with EIO, so that
1527 				 * the client can retry these I/Os in the
1528 				 * proper order should it attempt to recover.
1529 				 */
1530 				bioq_flush(&softc->bio_queue, NULL, EIO);
1531 				bp->bio_error = error;
1532 				bp->bio_resid = bp->bio_bcount;
1533 				bp->bio_flags |= BIO_ERROR;
1534 			} else {
1535 				bp->bio_resid = csio->resid;
1536 				bp->bio_error = 0;
1537 				if (bp->bio_resid != 0)
1538 					bp->bio_flags |= BIO_ERROR;
1539 			}
1540 			if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1541 				cam_release_devq(done_ccb->ccb_h.path,
1542 						 /*relsim_flags*/0,
1543 						 /*reduction*/0,
1544 						 /*timeout*/0,
1545 						 /*getcount_only*/0);
1546 		} else {
1547 			if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1548 				panic("REQ_CMP with QFRZN");
1549 			bp->bio_resid = csio->resid;
1550 			if (csio->resid > 0)
1551 				bp->bio_flags |= BIO_ERROR;
1552 		}
1553 
1554 		/*
1555 		 * Block out any asyncronous callbacks
1556 		 * while we touch the pending ccb list.
1557 		 */
1558 		LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
1559 		softc->outstanding_cmds--;
1560 		if (softc->outstanding_cmds == 0)
1561 			softc->flags |= DA_FLAG_WENT_IDLE;
1562 
1563 		biodone(bp);
1564 		break;
1565 	}
1566 	case DA_CCB_PROBE:
1567 	case DA_CCB_PROBE2:
1568 	{
1569 		struct	   scsi_read_capacity_data *rdcap;
1570 		struct     scsi_read_capacity_data_long *rcaplong;
1571 		char	   announce_buf[80];
1572 
1573 		rdcap = NULL;
1574 		rcaplong = NULL;
1575 		if (softc->state == DA_STATE_PROBE)
1576 			rdcap =(struct scsi_read_capacity_data *)csio->data_ptr;
1577 		else
1578 			rcaplong = (struct scsi_read_capacity_data_long *)
1579 				csio->data_ptr;
1580 
1581 		if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
1582 			struct disk_params *dp;
1583 			uint32_t block_size;
1584 			uint64_t maxsector;
1585 
1586 			if (softc->state == DA_STATE_PROBE) {
1587 				block_size = scsi_4btoul(rdcap->length);
1588 				maxsector = scsi_4btoul(rdcap->addr);
1589 
1590 				/*
1591 				 * According to SBC-2, if the standard 10
1592 				 * byte READ CAPACITY command returns 2^32,
1593 				 * we should issue the 16 byte version of
1594 				 * the command, since the device in question
1595 				 * has more sectors than can be represented
1596 				 * with the short version of the command.
1597 				 */
1598 				if (maxsector == 0xffffffff) {
1599 					softc->state = DA_STATE_PROBE2;
1600 					free(rdcap, M_SCSIDA);
1601 					xpt_release_ccb(done_ccb);
1602 					xpt_schedule(periph, /*priority*/5);
1603 					return;
1604 				}
1605 			} else {
1606 				block_size = scsi_4btoul(rcaplong->length);
1607 				maxsector = scsi_8btou64(rcaplong->addr);
1608 			}
1609 
1610 			/*
1611 			 * Because GEOM code just will panic us if we
1612 			 * give them an 'illegal' value we'll avoid that
1613 			 * here.
1614 			 */
1615 			if (block_size >= MAXPHYS || block_size == 0) {
1616 				xpt_print(periph->path,
1617 				    "unsupportable block size %ju\n",
1618 				    (uintmax_t) block_size);
1619 				announce_buf[0] = '\0';
1620 				cam_periph_invalidate(periph);
1621 			} else {
1622 				dasetgeom(periph, block_size, maxsector);
1623 				dp = &softc->params;
1624 				snprintf(announce_buf, sizeof(announce_buf),
1625 				        "%juMB (%ju %u byte sectors: %dH %dS/T "
1626                                         "%dC)", (uintmax_t)
1627 	                                (((uintmax_t)dp->secsize *
1628 				        dp->sectors) / (1024*1024)),
1629 			                (uintmax_t)dp->sectors,
1630 				        dp->secsize, dp->heads,
1631                                         dp->secs_per_track, dp->cylinders);
1632 			}
1633 		} else {
1634 			int	error;
1635 
1636 			announce_buf[0] = '\0';
1637 
1638 			/*
1639 			 * Retry any UNIT ATTENTION type errors.  They
1640 			 * are expected at boot.
1641 			 */
1642 			error = daerror(done_ccb, CAM_RETRY_SELTO,
1643 					SF_RETRY_UA|SF_NO_PRINT);
1644 			if (error == ERESTART) {
1645 				/*
1646 				 * A retry was scheuled, so
1647 				 * just return.
1648 				 */
1649 				return;
1650 			} else if (error != 0) {
1651 				struct scsi_sense_data *sense;
1652 				int asc, ascq;
1653 				int sense_key, error_code;
1654 				int have_sense;
1655 				cam_status status;
1656 				struct ccb_getdev cgd;
1657 
1658 				/* Don't wedge this device's queue */
1659 				status = done_ccb->ccb_h.status;
1660 				if ((status & CAM_DEV_QFRZN) != 0)
1661 					cam_release_devq(done_ccb->ccb_h.path,
1662 							 /*relsim_flags*/0,
1663 							 /*reduction*/0,
1664 							 /*timeout*/0,
1665 							 /*getcount_only*/0);
1666 
1667 
1668 				xpt_setup_ccb(&cgd.ccb_h,
1669 					      done_ccb->ccb_h.path,
1670 					      /* priority */ 1);
1671 				cgd.ccb_h.func_code = XPT_GDEV_TYPE;
1672 				xpt_action((union ccb *)&cgd);
1673 
1674 				if (((csio->ccb_h.flags & CAM_SENSE_PHYS) != 0)
1675 				 || ((csio->ccb_h.flags & CAM_SENSE_PTR) != 0)
1676 				 || ((status & CAM_AUTOSNS_VALID) == 0))
1677 					have_sense = FALSE;
1678 				else
1679 					have_sense = TRUE;
1680 
1681 				if (have_sense) {
1682 					sense = &csio->sense_data;
1683 					scsi_extract_sense(sense, &error_code,
1684 							   &sense_key,
1685 							   &asc, &ascq);
1686 				}
1687 				/*
1688 				 * Attach to anything that claims to be a
1689 				 * direct access or optical disk device,
1690 				 * as long as it doesn't return a "Logical
1691 				 * unit not supported" (0x25) error.
1692 				 */
1693 				if ((have_sense) && (asc != 0x25)
1694 				 && (error_code == SSD_CURRENT_ERROR)) {
1695 					const char *sense_key_desc;
1696 					const char *asc_desc;
1697 
1698 					scsi_sense_desc(sense_key, asc, ascq,
1699 							&cgd.inq_data,
1700 							&sense_key_desc,
1701 							&asc_desc);
1702 					snprintf(announce_buf,
1703 					    sizeof(announce_buf),
1704 						"Attempt to query device "
1705 						"size failed: %s, %s",
1706 						sense_key_desc,
1707 						asc_desc);
1708 				} else {
1709 					if (have_sense)
1710 						scsi_sense_print(
1711 							&done_ccb->csio);
1712 					else {
1713 						xpt_print(periph->path,
1714 						    "got CAM status %#x\n",
1715 						    done_ccb->ccb_h.status);
1716 					}
1717 
1718 					xpt_print(periph->path, "fatal error, "
1719 					    "failed to attach to device\n");
1720 
1721 					/*
1722 					 * Free up resources.
1723 					 */
1724 					cam_periph_invalidate(periph);
1725 				}
1726 			}
1727 		}
1728 		free(csio->data_ptr, M_SCSIDA);
1729 		if (announce_buf[0] != '\0') {
1730 			xpt_announce_periph(periph, announce_buf);
1731 			/*
1732 			 * Create our sysctl variables, now that we know
1733 			 * we have successfully attached.
1734 			 */
1735 			taskqueue_enqueue(taskqueue_thread,&softc->sysctl_task);
1736 		}
1737 		softc->state = DA_STATE_NORMAL;
1738 		/*
1739 		 * Since our peripheral may be invalidated by an error
1740 		 * above or an external event, we must release our CCB
1741 		 * before releasing the probe lock on the peripheral.
1742 		 * The peripheral will only go away once the last lock
1743 		 * is removed, and we need it around for the CCB release
1744 		 * operation.
1745 		 */
1746 		xpt_release_ccb(done_ccb);
1747 		cam_periph_unhold(periph);
1748 		return;
1749 	}
1750 	case DA_CCB_WAITING:
1751 	{
1752 		/* Caller will release the CCB */
1753 		wakeup(&done_ccb->ccb_h.cbfcnp);
1754 		return;
1755 	}
1756 	case DA_CCB_DUMP:
1757 		/* No-op.  We're polling */
1758 		return;
1759 	default:
1760 		break;
1761 	}
1762 	xpt_release_ccb(done_ccb);
1763 }
1764 
1765 static int
1766 daerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
1767 {
1768 	struct da_softc	  *softc;
1769 	struct cam_periph *periph;
1770 	int error;
1771 
1772 	periph = xpt_path_periph(ccb->ccb_h.path);
1773 	softc = (struct da_softc *)periph->softc;
1774 
1775  	/*
1776 	 * Automatically detect devices that do not support
1777  	 * READ(6)/WRITE(6) and upgrade to using 10 byte cdbs.
1778  	 */
1779 	error = 0;
1780 	if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INVALID) {
1781 		error = cmd6workaround(ccb);
1782 	} else if (((ccb->ccb_h.status & CAM_STATUS_MASK) ==
1783 		   CAM_SCSI_STATUS_ERROR)
1784 	 && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)
1785 	 && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
1786 	 && ((ccb->ccb_h.flags & CAM_SENSE_PHYS) == 0)
1787 	 && ((ccb->ccb_h.flags & CAM_SENSE_PTR) == 0)) {
1788 		int sense_key, error_code, asc, ascq;
1789 
1790  		scsi_extract_sense(&ccb->csio.sense_data,
1791 				   &error_code, &sense_key, &asc, &ascq);
1792 		if (sense_key == SSD_KEY_ILLEGAL_REQUEST)
1793  			error = cmd6workaround(ccb);
1794 	}
1795 	if (error == ERESTART)
1796 		return (ERESTART);
1797 
1798 	/*
1799 	 * XXX
1800 	 * Until we have a better way of doing pack validation,
1801 	 * don't treat UAs as errors.
1802 	 */
1803 	sense_flags |= SF_RETRY_UA;
1804 	return(cam_periph_error(ccb, cam_flags, sense_flags,
1805 				&softc->saved_ccb));
1806 }
1807 
1808 static void
1809 daprevent(struct cam_periph *periph, int action)
1810 {
1811 	struct	da_softc *softc;
1812 	union	ccb *ccb;
1813 	int	error;
1814 
1815 	softc = (struct da_softc *)periph->softc;
1816 
1817 	if (((action == PR_ALLOW)
1818 	  && (softc->flags & DA_FLAG_PACK_LOCKED) == 0)
1819 	 || ((action == PR_PREVENT)
1820 	  && (softc->flags & DA_FLAG_PACK_LOCKED) != 0)) {
1821 		return;
1822 	}
1823 
1824 	ccb = cam_periph_getccb(periph, /*priority*/1);
1825 
1826 	scsi_prevent(&ccb->csio,
1827 		     /*retries*/1,
1828 		     /*cbcfp*/dadone,
1829 		     MSG_SIMPLE_Q_TAG,
1830 		     action,
1831 		     SSD_FULL_SIZE,
1832 		     5000);
1833 
1834 	error = cam_periph_runccb(ccb, /*error_routine*/NULL, CAM_RETRY_SELTO,
1835 				  SF_RETRY_UA, softc->disk->d_devstat);
1836 
1837 	if (error == 0) {
1838 		if (action == PR_ALLOW)
1839 			softc->flags &= ~DA_FLAG_PACK_LOCKED;
1840 		else
1841 			softc->flags |= DA_FLAG_PACK_LOCKED;
1842 	}
1843 
1844 	xpt_release_ccb(ccb);
1845 }
1846 
1847 static int
1848 dagetcapacity(struct cam_periph *periph)
1849 {
1850 	struct da_softc *softc;
1851 	union ccb *ccb;
1852 	struct scsi_read_capacity_data *rcap;
1853 	struct scsi_read_capacity_data_long *rcaplong;
1854 	uint32_t block_len;
1855 	uint64_t maxsector;
1856 	int error;
1857 	u_int32_t sense_flags;
1858 
1859 	softc = (struct da_softc *)periph->softc;
1860 	block_len = 0;
1861 	maxsector = 0;
1862 	error = 0;
1863 	sense_flags = SF_RETRY_UA;
1864 	if (softc->flags & DA_FLAG_PACK_REMOVABLE)
1865 		sense_flags |= SF_NO_PRINT;
1866 
1867 	/* Do a read capacity */
1868 	rcap = (struct scsi_read_capacity_data *)malloc(sizeof(*rcaplong),
1869 							M_SCSIDA,
1870 							M_NOWAIT);
1871 	if (rcap == NULL)
1872 		return (ENOMEM);
1873 
1874 	ccb = cam_periph_getccb(periph, /*priority*/1);
1875 	scsi_read_capacity(&ccb->csio,
1876 			   /*retries*/4,
1877 			   /*cbfncp*/dadone,
1878 			   MSG_SIMPLE_Q_TAG,
1879 			   rcap,
1880 			   SSD_FULL_SIZE,
1881 			   /*timeout*/60000);
1882 	ccb->ccb_h.ccb_bp = NULL;
1883 
1884 	error = cam_periph_runccb(ccb, daerror,
1885 				  /*cam_flags*/CAM_RETRY_SELTO,
1886 				  sense_flags,
1887 				  softc->disk->d_devstat);
1888 
1889 	if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1890 		cam_release_devq(ccb->ccb_h.path,
1891 				 /*relsim_flags*/0,
1892 				 /*reduction*/0,
1893 				 /*timeout*/0,
1894 				 /*getcount_only*/0);
1895 
1896 	if (error == 0) {
1897 		block_len = scsi_4btoul(rcap->length);
1898 		maxsector = scsi_4btoul(rcap->addr);
1899 
1900 		if (maxsector != 0xffffffff)
1901 			goto done;
1902 	} else
1903 		goto done;
1904 
1905 	rcaplong = (struct scsi_read_capacity_data_long *)rcap;
1906 
1907 	scsi_read_capacity_16(&ccb->csio,
1908 			      /*retries*/ 4,
1909 			      /*cbfcnp*/ dadone,
1910 			      /*tag_action*/ MSG_SIMPLE_Q_TAG,
1911 			      /*lba*/ 0,
1912 			      /*reladr*/ 0,
1913 			      /*pmi*/ 0,
1914 			      rcaplong,
1915 			      /*sense_len*/ SSD_FULL_SIZE,
1916 			      /*timeout*/ 60000);
1917 	ccb->ccb_h.ccb_bp = NULL;
1918 
1919 	error = cam_periph_runccb(ccb, daerror,
1920 				  /*cam_flags*/CAM_RETRY_SELTO,
1921 				  sense_flags,
1922 				  softc->disk->d_devstat);
1923 
1924 	if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1925 		cam_release_devq(ccb->ccb_h.path,
1926 				 /*relsim_flags*/0,
1927 				 /*reduction*/0,
1928 				 /*timeout*/0,
1929 				 /*getcount_only*/0);
1930 
1931 	if (error == 0) {
1932 		block_len = scsi_4btoul(rcaplong->length);
1933 		maxsector = scsi_8btou64(rcaplong->addr);
1934 	}
1935 
1936 done:
1937 
1938 	if (error == 0)
1939 		dasetgeom(periph, block_len, maxsector);
1940 
1941 	xpt_release_ccb(ccb);
1942 
1943 	free(rcap, M_SCSIDA);
1944 
1945 	return (error);
1946 }
1947 
1948 static void
1949 dasetgeom(struct cam_periph *periph, uint32_t block_len, uint64_t maxsector)
1950 {
1951 	struct ccb_calc_geometry ccg;
1952 	struct da_softc *softc;
1953 	struct disk_params *dp;
1954 
1955 	softc = (struct da_softc *)periph->softc;
1956 
1957 	dp = &softc->params;
1958 	dp->secsize = block_len;
1959 	dp->sectors = maxsector + 1;
1960 	/*
1961 	 * Have the controller provide us with a geometry
1962 	 * for this disk.  The only time the geometry
1963 	 * matters is when we boot and the controller
1964 	 * is the only one knowledgeable enough to come
1965 	 * up with something that will make this a bootable
1966 	 * device.
1967 	 */
1968 	xpt_setup_ccb(&ccg.ccb_h, periph->path, /*priority*/1);
1969 	ccg.ccb_h.func_code = XPT_CALC_GEOMETRY;
1970 	ccg.block_size = dp->secsize;
1971 	ccg.volume_size = dp->sectors;
1972 	ccg.heads = 0;
1973 	ccg.secs_per_track = 0;
1974 	ccg.cylinders = 0;
1975 	xpt_action((union ccb*)&ccg);
1976 	if ((ccg.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1977 		/*
1978 		 * We don't know what went wrong here- but just pick
1979 		 * a geometry so we don't have nasty things like divide
1980 		 * by zero.
1981 		 */
1982 		dp->heads = 255;
1983 		dp->secs_per_track = 255;
1984 		dp->cylinders = dp->sectors / (255 * 255);
1985 		if (dp->cylinders == 0) {
1986 			dp->cylinders = 1;
1987 		}
1988 	} else {
1989 		dp->heads = ccg.heads;
1990 		dp->secs_per_track = ccg.secs_per_track;
1991 		dp->cylinders = ccg.cylinders;
1992 	}
1993 }
1994 
1995 static void
1996 dasendorderedtag(void *arg)
1997 {
1998 	struct da_softc *softc = arg;
1999 
2000 	if (da_send_ordered) {
2001 		if ((softc->ordered_tag_count == 0)
2002 		 && ((softc->flags & DA_FLAG_WENT_IDLE) == 0)) {
2003 			softc->flags |= DA_FLAG_NEED_OTAG;
2004 		}
2005 		if (softc->outstanding_cmds > 0)
2006 			softc->flags &= ~DA_FLAG_WENT_IDLE;
2007 
2008 		softc->ordered_tag_count = 0;
2009 	}
2010 	/* Queue us up again */
2011 	callout_reset(&softc->sendordered_c,
2012 	    (DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL,
2013 	    dasendorderedtag, softc);
2014 }
2015 
2016 /*
2017  * Step through all DA peripheral drivers, and if the device is still open,
2018  * sync the disk cache to physical media.
2019  */
2020 static void
2021 dashutdown(void * arg, int howto)
2022 {
2023 	struct cam_periph *periph;
2024 	struct da_softc *softc;
2025 
2026 	TAILQ_FOREACH(periph, &dadriver.units, unit_links) {
2027 		union ccb ccb;
2028 
2029 		cam_periph_lock(periph);
2030 		softc = (struct da_softc *)periph->softc;
2031 
2032 		/*
2033 		 * We only sync the cache if the drive is still open, and
2034 		 * if the drive is capable of it..
2035 		 */
2036 		if (((softc->flags & DA_FLAG_OPEN) == 0)
2037 		 || (softc->quirks & DA_Q_NO_SYNC_CACHE)) {
2038 			cam_periph_unlock(periph);
2039 			continue;
2040 		}
2041 
2042 		xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/1);
2043 
2044 		ccb.ccb_h.ccb_state = DA_CCB_DUMP;
2045 		scsi_synchronize_cache(&ccb.csio,
2046 				       /*retries*/1,
2047 				       /*cbfcnp*/dadone,
2048 				       MSG_SIMPLE_Q_TAG,
2049 				       /*begin_lba*/0, /* whole disk */
2050 				       /*lb_count*/0,
2051 				       SSD_FULL_SIZE,
2052 				       60 * 60 * 1000);
2053 
2054 		xpt_polled_action(&ccb);
2055 
2056 		if ((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
2057 			if (((ccb.ccb_h.status & CAM_STATUS_MASK) ==
2058 			     CAM_SCSI_STATUS_ERROR)
2059 			 && (ccb.csio.scsi_status == SCSI_STATUS_CHECK_COND)){
2060 				int error_code, sense_key, asc, ascq;
2061 
2062 				scsi_extract_sense(&ccb.csio.sense_data,
2063 						   &error_code, &sense_key,
2064 						   &asc, &ascq);
2065 
2066 				if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
2067 					scsi_sense_print(&ccb.csio);
2068 			} else {
2069 				xpt_print(periph->path, "Synchronize "
2070 				    "cache failed, status == 0x%x, scsi status "
2071 				    "== 0x%x\n", ccb.ccb_h.status,
2072 				    ccb.csio.scsi_status);
2073 			}
2074 		}
2075 
2076 		if ((ccb.ccb_h.status & CAM_DEV_QFRZN) != 0)
2077 			cam_release_devq(ccb.ccb_h.path,
2078 					 /*relsim_flags*/0,
2079 					 /*reduction*/0,
2080 					 /*timeout*/0,
2081 					 /*getcount_only*/0);
2082 		cam_periph_unlock(periph);
2083 	}
2084 }
2085 
2086 #else /* !_KERNEL */
2087 
2088 /*
2089  * XXX This is only left out of the kernel build to silence warnings.  If,
2090  * for some reason this function is used in the kernel, the ifdefs should
2091  * be moved so it is included both in the kernel and userland.
2092  */
2093 void
2094 scsi_format_unit(struct ccb_scsiio *csio, u_int32_t retries,
2095 		 void (*cbfcnp)(struct cam_periph *, union ccb *),
2096 		 u_int8_t tag_action, u_int8_t byte2, u_int16_t ileave,
2097 		 u_int8_t *data_ptr, u_int32_t dxfer_len, u_int8_t sense_len,
2098 		 u_int32_t timeout)
2099 {
2100 	struct scsi_format_unit *scsi_cmd;
2101 
2102 	scsi_cmd = (struct scsi_format_unit *)&csio->cdb_io.cdb_bytes;
2103 	scsi_cmd->opcode = FORMAT_UNIT;
2104 	scsi_cmd->byte2 = byte2;
2105 	scsi_ulto2b(ileave, scsi_cmd->interleave);
2106 
2107 	cam_fill_csio(csio,
2108 		      retries,
2109 		      cbfcnp,
2110 		      /*flags*/ (dxfer_len > 0) ? CAM_DIR_OUT : CAM_DIR_NONE,
2111 		      tag_action,
2112 		      data_ptr,
2113 		      dxfer_len,
2114 		      sense_len,
2115 		      sizeof(*scsi_cmd),
2116 		      timeout);
2117 }
2118 
2119 #endif /* _KERNEL */
2120