xref: /freebsd/sys/cam/scsi/scsi_da.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
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 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Netac", "OnlyDisk*",
540 		 "2000"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
541 	}
542 };
543 
544 static	disk_strategy_t	dastrategy;
545 static	dumper_t	dadump;
546 static	periph_init_t	dainit;
547 static	void		daasync(void *callback_arg, u_int32_t code,
548 				struct cam_path *path, void *arg);
549 static	void		dasysctlinit(void *context, int pending);
550 static	int		dacmdsizesysctl(SYSCTL_HANDLER_ARGS);
551 static	periph_ctor_t	daregister;
552 static	periph_dtor_t	dacleanup;
553 static	periph_start_t	dastart;
554 static	periph_oninv_t	daoninvalidate;
555 static	void		dadone(struct cam_periph *periph,
556 			       union ccb *done_ccb);
557 static  int		daerror(union ccb *ccb, u_int32_t cam_flags,
558 				u_int32_t sense_flags);
559 static void		daprevent(struct cam_periph *periph, int action);
560 static int		dagetcapacity(struct cam_periph *periph);
561 static void		dasetgeom(struct cam_periph *periph, uint32_t block_len,
562 				  uint64_t maxsector);
563 static timeout_t	dasendorderedtag;
564 static void		dashutdown(void *arg, int howto);
565 
566 #ifndef DA_DEFAULT_TIMEOUT
567 #define DA_DEFAULT_TIMEOUT 60	/* Timeout in seconds */
568 #endif
569 
570 #ifndef	DA_DEFAULT_RETRY
571 #define	DA_DEFAULT_RETRY	4
572 #endif
573 
574 #ifndef	DA_DEFAULT_SEND_ORDERED
575 #define	DA_DEFAULT_SEND_ORDERED	1
576 #endif
577 
578 
579 static int da_retry_count = DA_DEFAULT_RETRY;
580 static int da_default_timeout = DA_DEFAULT_TIMEOUT;
581 static int da_send_ordered = DA_DEFAULT_SEND_ORDERED;
582 
583 SYSCTL_NODE(_kern_cam, OID_AUTO, da, CTLFLAG_RD, 0,
584             "CAM Direct Access Disk driver");
585 SYSCTL_INT(_kern_cam_da, OID_AUTO, retry_count, CTLFLAG_RW,
586            &da_retry_count, 0, "Normal I/O retry count");
587 TUNABLE_INT("kern.cam.da.retry_count", &da_retry_count);
588 SYSCTL_INT(_kern_cam_da, OID_AUTO, default_timeout, CTLFLAG_RW,
589            &da_default_timeout, 0, "Normal I/O timeout (in seconds)");
590 TUNABLE_INT("kern.cam.da.default_timeout", &da_default_timeout);
591 SYSCTL_INT(_kern_cam_da, OID_AUTO, da_send_ordered, CTLFLAG_RW,
592            &da_send_ordered, 0, "Send Ordered Tags");
593 TUNABLE_INT("kern.cam.da.da_send_ordered", &da_send_ordered);
594 
595 /*
596  * DA_ORDEREDTAG_INTERVAL determines how often, relative
597  * to the default timeout, we check to see whether an ordered
598  * tagged transaction is appropriate to prevent simple tag
599  * starvation.  Since we'd like to ensure that there is at least
600  * 1/2 of the timeout length left for a starved transaction to
601  * complete after we've sent an ordered tag, we must poll at least
602  * four times in every timeout period.  This takes care of the worst
603  * case where a starved transaction starts during an interval that
604  * meets the requirement "don't send an ordered tag" test so it takes
605  * us two intervals to determine that a tag must be sent.
606  */
607 #ifndef DA_ORDEREDTAG_INTERVAL
608 #define DA_ORDEREDTAG_INTERVAL 4
609 #endif
610 
611 static struct periph_driver dadriver =
612 {
613 	dainit, "da",
614 	TAILQ_HEAD_INITIALIZER(dadriver.units), /* generation */ 0
615 };
616 
617 PERIPHDRIVER_DECLARE(da, dadriver);
618 
619 MALLOC_DEFINE(M_SCSIDA, "scsi_da", "scsi_da buffers");
620 
621 static int
622 daopen(struct disk *dp)
623 {
624 	struct cam_periph *periph;
625 	struct da_softc *softc;
626 	int unit;
627 	int error;
628 
629 	periph = (struct cam_periph *)dp->d_drv1;
630 	if (periph == NULL) {
631 		return (ENXIO);
632 	}
633 
634 	if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
635 		return(ENXIO);
636 	}
637 
638 	cam_periph_lock(periph);
639 	if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) {
640 		cam_periph_unlock(periph);
641 		cam_periph_release(periph);
642 		return (error);
643 	}
644 
645 	unit = periph->unit_number;
646 	softc = (struct da_softc *)periph->softc;
647 	softc->flags |= DA_FLAG_OPEN;
648 
649 	CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
650 	    ("daopen: disk=%s%d (unit %d)\n", dp->d_name, dp->d_unit,
651 	     unit));
652 
653 	if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
654 		/* Invalidate our pack information. */
655 		softc->flags &= ~DA_FLAG_PACK_INVALID;
656 	}
657 
658 	error = dagetcapacity(periph);
659 
660 	if (error == 0) {
661 
662 		softc->disk->d_sectorsize = softc->params.secsize;
663 		softc->disk->d_mediasize = softc->params.secsize * (off_t)softc->params.sectors;
664 		/* XXX: these are not actually "firmware" values, so they may be wrong */
665 		softc->disk->d_fwsectors = softc->params.secs_per_track;
666 		softc->disk->d_fwheads = softc->params.heads;
667 		softc->disk->d_devstat->block_size = softc->params.secsize;
668 		softc->disk->d_devstat->flags &= ~DEVSTAT_BS_UNAVAILABLE;
669 	}
670 
671 	if (error == 0) {
672 		if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0 &&
673 		    (softc->quirks & DA_Q_NO_PREVENT) == 0)
674 			daprevent(periph, PR_PREVENT);
675 	} else {
676 		softc->flags &= ~DA_FLAG_OPEN;
677 		cam_periph_release(periph);
678 	}
679 	cam_periph_unhold(periph);
680 	cam_periph_unlock(periph);
681 	return (error);
682 }
683 
684 static int
685 daclose(struct disk *dp)
686 {
687 	struct	cam_periph *periph;
688 	struct	da_softc *softc;
689 	int error;
690 
691 	periph = (struct cam_periph *)dp->d_drv1;
692 	if (periph == NULL)
693 		return (ENXIO);
694 
695 	cam_periph_lock(periph);
696 	if ((error = cam_periph_hold(periph, PRIBIO)) != 0) {
697 		cam_periph_unlock(periph);
698 		cam_periph_release(periph);
699 		return (error);
700 	}
701 
702 	softc = (struct da_softc *)periph->softc;
703 
704 	if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
705 		union	ccb *ccb;
706 
707 		ccb = cam_periph_getccb(periph, /*priority*/1);
708 
709 		scsi_synchronize_cache(&ccb->csio,
710 				       /*retries*/1,
711 				       /*cbfcnp*/dadone,
712 				       MSG_SIMPLE_Q_TAG,
713 				       /*begin_lba*/0,/* Cover the whole disk */
714 				       /*lb_count*/0,
715 				       SSD_FULL_SIZE,
716 				       5 * 60 * 1000);
717 
718 		cam_periph_runccb(ccb, /*error_routine*/NULL, /*cam_flags*/0,
719 				  /*sense_flags*/SF_RETRY_UA,
720 				  softc->disk->d_devstat);
721 
722 		if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
723 			if ((ccb->ccb_h.status & CAM_STATUS_MASK) ==
724 			     CAM_SCSI_STATUS_ERROR) {
725 				int asc, ascq;
726 				int sense_key, error_code;
727 
728 				scsi_extract_sense(&ccb->csio.sense_data,
729 						   &error_code,
730 						   &sense_key,
731 						   &asc, &ascq);
732 				if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
733 					scsi_sense_print(&ccb->csio);
734 			} else {
735 				xpt_print(periph->path, "Synchronize cache "
736 				    "failed, status == 0x%x, scsi status == "
737 				    "0x%x\n", ccb->csio.ccb_h.status,
738 				    ccb->csio.scsi_status);
739 			}
740 		}
741 
742 		if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
743 			cam_release_devq(ccb->ccb_h.path,
744 					 /*relsim_flags*/0,
745 					 /*reduction*/0,
746 					 /*timeout*/0,
747 					 /*getcount_only*/0);
748 
749 		xpt_release_ccb(ccb);
750 
751 	}
752 
753 	if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0) {
754 		if ((softc->quirks & DA_Q_NO_PREVENT) == 0)
755 			daprevent(periph, PR_ALLOW);
756 		/*
757 		 * If we've got removeable media, mark the blocksize as
758 		 * unavailable, since it could change when new media is
759 		 * inserted.
760 		 */
761 		softc->disk->d_devstat->flags |= DEVSTAT_BS_UNAVAILABLE;
762 	}
763 
764 	softc->flags &= ~DA_FLAG_OPEN;
765 	cam_periph_unhold(periph);
766 	cam_periph_release(periph);
767 	cam_periph_unlock(periph);
768 	return (0);
769 }
770 
771 /*
772  * Actually translate the requested transfer into one the physical driver
773  * can understand.  The transfer is described by a buf and will include
774  * only one physical transfer.
775  */
776 static void
777 dastrategy(struct bio *bp)
778 {
779 	struct cam_periph *periph;
780 	struct da_softc *softc;
781 
782 	periph = (struct cam_periph *)bp->bio_disk->d_drv1;
783 	if (periph == NULL) {
784 		biofinish(bp, NULL, ENXIO);
785 		return;
786 	}
787 	softc = (struct da_softc *)periph->softc;
788 
789 	cam_periph_lock(periph);
790 
791 #if 0
792 	/*
793 	 * check it's not too big a transfer for our adapter
794 	 */
795 	scsi_minphys(bp,&sd_switch);
796 #endif
797 
798 	/*
799 	 * Mask interrupts so that the pack cannot be invalidated until
800 	 * after we are in the queue.  Otherwise, we might not properly
801 	 * clean up one of the buffers.
802 	 */
803 
804 	/*
805 	 * If the device has been made invalid, error out
806 	 */
807 	if ((softc->flags & DA_FLAG_PACK_INVALID)) {
808 		cam_periph_unlock(periph);
809 		biofinish(bp, NULL, ENXIO);
810 		return;
811 	}
812 
813 	/*
814 	 * Place it in the queue of disk activities for this disk
815 	 */
816 	bioq_disksort(&softc->bio_queue, bp);
817 
818 	/*
819 	 * Schedule ourselves for performing the work.
820 	 */
821 	xpt_schedule(periph, /* XXX priority */1);
822 	cam_periph_unlock(periph);
823 
824 	return;
825 }
826 
827 static int
828 dadump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
829 {
830 	struct	    cam_periph *periph;
831 	struct	    da_softc *softc;
832 	u_int	    secsize;
833 	struct	    ccb_scsiio csio;
834 	struct	    disk *dp;
835 
836 	dp = arg;
837 	periph = dp->d_drv1;
838 	if (periph == NULL)
839 		return (ENXIO);
840 	softc = (struct da_softc *)periph->softc;
841 	cam_periph_lock(periph);
842 	secsize = softc->params.secsize;
843 
844 	if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
845 		cam_periph_unlock(periph);
846 		return (ENXIO);
847 	}
848 
849 	if (length > 0) {
850 		periph->flags |= CAM_PERIPH_POLLED;
851 		xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
852 		csio.ccb_h.ccb_state = DA_CCB_DUMP;
853 		scsi_read_write(&csio,
854 				/*retries*/1,
855 				dadone,
856 				MSG_ORDERED_Q_TAG,
857 				/*read*/FALSE,
858 				/*byte2*/0,
859 				/*minimum_cmd_size*/ softc->minimum_cmd_size,
860 				offset / secsize,
861 				length / secsize,
862 				/*data_ptr*/(u_int8_t *) virtual,
863 				/*dxfer_len*/length,
864 				/*sense_len*/SSD_FULL_SIZE,
865 				DA_DEFAULT_TIMEOUT * 1000);
866 		xpt_polled_action((union ccb *)&csio);
867 
868 		if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
869 			printf("Aborting dump due to I/O error.\n");
870 			if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
871 			     CAM_SCSI_STATUS_ERROR)
872 				scsi_sense_print(&csio);
873 			else
874 				printf("status == 0x%x, scsi status == 0x%x\n",
875 				       csio.ccb_h.status, csio.scsi_status);
876 			periph->flags |= CAM_PERIPH_POLLED;
877 			return(EIO);
878 		}
879 		cam_periph_unlock(periph);
880 		return(0);
881 	}
882 
883 	/*
884 	 * Sync the disk cache contents to the physical media.
885 	 */
886 	if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
887 
888 		xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
889 		csio.ccb_h.ccb_state = DA_CCB_DUMP;
890 		scsi_synchronize_cache(&csio,
891 				       /*retries*/1,
892 				       /*cbfcnp*/dadone,
893 				       MSG_SIMPLE_Q_TAG,
894 				       /*begin_lba*/0,/* Cover the whole disk */
895 				       /*lb_count*/0,
896 				       SSD_FULL_SIZE,
897 				       5 * 60 * 1000);
898 		xpt_polled_action((union ccb *)&csio);
899 
900 		if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
901 			if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
902 			     CAM_SCSI_STATUS_ERROR) {
903 				int asc, ascq;
904 				int sense_key, error_code;
905 
906 				scsi_extract_sense(&csio.sense_data,
907 						   &error_code,
908 						   &sense_key,
909 						   &asc, &ascq);
910 				if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
911 					scsi_sense_print(&csio);
912 			} else {
913 				xpt_print(periph->path, "Synchronize cache "
914 				    "failed, status == 0x%x, scsi status == "
915 				    "0x%x\n", csio.ccb_h.status,
916 				    csio.scsi_status);
917 			}
918 		}
919 	}
920 	periph->flags &= ~CAM_PERIPH_POLLED;
921 	cam_periph_unlock(periph);
922 	return (0);
923 }
924 
925 static void
926 dainit(void)
927 {
928 	cam_status status;
929 
930 	/*
931 	 * Install a global async callback.  This callback will
932 	 * receive async callbacks like "new device found".
933 	 */
934 	status = xpt_register_async(AC_FOUND_DEVICE, daasync, NULL, NULL);
935 
936 	if (status != CAM_REQ_CMP) {
937 		printf("da: Failed to attach master async callback "
938 		       "due to status 0x%x!\n", status);
939 	} else if (da_send_ordered) {
940 
941 		/* Register our shutdown event handler */
942 		if ((EVENTHANDLER_REGISTER(shutdown_post_sync, dashutdown,
943 					   NULL, SHUTDOWN_PRI_DEFAULT)) == NULL)
944 		    printf("dainit: shutdown event registration failed!\n");
945 	}
946 }
947 
948 static void
949 daoninvalidate(struct cam_periph *periph)
950 {
951 	struct da_softc *softc;
952 
953 	softc = (struct da_softc *)periph->softc;
954 
955 	/*
956 	 * De-register any async callbacks.
957 	 */
958 	xpt_register_async(0, daasync, periph, periph->path);
959 
960 	softc->flags |= DA_FLAG_PACK_INVALID;
961 
962 	/*
963 	 * Return all queued I/O with ENXIO.
964 	 * XXX Handle any transactions queued to the card
965 	 *     with XPT_ABORT_CCB.
966 	 */
967 	bioq_flush(&softc->bio_queue, NULL, ENXIO);
968 
969 	disk_gone(softc->disk);
970 	xpt_print(periph->path, "lost device\n");
971 }
972 
973 static void
974 dacleanup(struct cam_periph *periph)
975 {
976 	struct da_softc *softc;
977 
978 	softc = (struct da_softc *)periph->softc;
979 
980 	xpt_print(periph->path, "removing device entry\n");
981 	/*
982 	 * If we can't free the sysctl tree, oh well...
983 	 */
984 	if ((softc->flags & DA_FLAG_SCTX_INIT) != 0
985 	    && sysctl_ctx_free(&softc->sysctl_ctx) != 0) {
986 		xpt_print(periph->path, "can't remove sysctl context\n");
987 	}
988 
989 	cam_periph_unlock(periph);
990 	disk_destroy(softc->disk);
991 	callout_drain(&softc->sendordered_c);
992 	cam_periph_lock(periph);
993 	free(softc, M_DEVBUF);
994 }
995 
996 static void
997 daasync(void *callback_arg, u_int32_t code,
998 	struct cam_path *path, void *arg)
999 {
1000 	struct cam_periph *periph;
1001 
1002 	periph = (struct cam_periph *)callback_arg;
1003 	switch (code) {
1004 	case AC_FOUND_DEVICE:
1005 	{
1006 		struct ccb_getdev *cgd;
1007 		struct cam_sim *sim;
1008 		cam_status status;
1009 
1010 		cgd = (struct ccb_getdev *)arg;
1011 		if (cgd == NULL)
1012 			break;
1013 
1014 		if (SID_TYPE(&cgd->inq_data) != T_DIRECT
1015 		    && SID_TYPE(&cgd->inq_data) != T_RBC
1016 		    && SID_TYPE(&cgd->inq_data) != T_OPTICAL)
1017 			break;
1018 
1019 		/*
1020 		 * Allocate a peripheral instance for
1021 		 * this device and start the probe
1022 		 * process.
1023 		 */
1024 		sim = xpt_path_sim(cgd->ccb_h.path);
1025 		status = cam_periph_alloc(daregister, daoninvalidate,
1026 					  dacleanup, dastart,
1027 					  "da", CAM_PERIPH_BIO,
1028 					  cgd->ccb_h.path, daasync,
1029 					  AC_FOUND_DEVICE, cgd);
1030 
1031 		if (status != CAM_REQ_CMP
1032 		 && status != CAM_REQ_INPROG)
1033 			printf("daasync: Unable to attach to new device "
1034 				"due to status 0x%x\n", status);
1035 		break;
1036 	}
1037 	case AC_SENT_BDR:
1038 	case AC_BUS_RESET:
1039 	{
1040 		struct da_softc *softc;
1041 		struct ccb_hdr *ccbh;
1042 
1043 		softc = (struct da_softc *)periph->softc;
1044 		/*
1045 		 * Don't fail on the expected unit attention
1046 		 * that will occur.
1047 		 */
1048 		softc->flags |= DA_FLAG_RETRY_UA;
1049 		LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le)
1050 			ccbh->ccb_state |= DA_CCB_RETRY_UA;
1051 		/* FALLTHROUGH*/
1052 	}
1053 	default:
1054 		cam_periph_async(periph, code, path, arg);
1055 		break;
1056 	}
1057 }
1058 
1059 static void
1060 dasysctlinit(void *context, int pending)
1061 {
1062 	struct cam_periph *periph;
1063 	struct da_softc *softc;
1064 	char tmpstr[80], tmpstr2[80];
1065 
1066 	periph = (struct cam_periph *)context;
1067 	if (cam_periph_acquire(periph) != CAM_REQ_CMP)
1068 		return;
1069 
1070 	softc = (struct da_softc *)periph->softc;
1071 	snprintf(tmpstr, sizeof(tmpstr), "CAM DA unit %d", periph->unit_number);
1072 	snprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number);
1073 
1074 	mtx_lock(&Giant);
1075 	sysctl_ctx_init(&softc->sysctl_ctx);
1076 	softc->flags |= DA_FLAG_SCTX_INIT;
1077 	softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
1078 		SYSCTL_STATIC_CHILDREN(_kern_cam_da), OID_AUTO, tmpstr2,
1079 		CTLFLAG_RD, 0, tmpstr);
1080 	if (softc->sysctl_tree == NULL) {
1081 		printf("dasysctlinit: unable to allocate sysctl tree\n");
1082 		mtx_unlock(&Giant);
1083 		cam_periph_release(periph);
1084 		return;
1085 	}
1086 
1087 	/*
1088 	 * Now register the sysctl handler, so the user can the value on
1089 	 * the fly.
1090 	 */
1091 	SYSCTL_ADD_PROC(&softc->sysctl_ctx,SYSCTL_CHILDREN(softc->sysctl_tree),
1092 		OID_AUTO, "minimum_cmd_size", CTLTYPE_INT | CTLFLAG_RW,
1093 		&softc->minimum_cmd_size, 0, dacmdsizesysctl, "I",
1094 		"Minimum CDB size");
1095 
1096 	mtx_unlock(&Giant);
1097 	cam_periph_release(periph);
1098 }
1099 
1100 static int
1101 dacmdsizesysctl(SYSCTL_HANDLER_ARGS)
1102 {
1103 	int error, value;
1104 
1105 	value = *(int *)arg1;
1106 
1107 	error = sysctl_handle_int(oidp, &value, 0, req);
1108 
1109 	if ((error != 0)
1110 	 || (req->newptr == NULL))
1111 		return (error);
1112 
1113 	/*
1114 	 * Acceptable values here are 6, 10, 12 or 16.
1115 	 */
1116 	if (value < 6)
1117 		value = 6;
1118 	else if ((value > 6)
1119 	      && (value <= 10))
1120 		value = 10;
1121 	else if ((value > 10)
1122 	      && (value <= 12))
1123 		value = 12;
1124 	else if (value > 12)
1125 		value = 16;
1126 
1127 	*(int *)arg1 = value;
1128 
1129 	return (0);
1130 }
1131 
1132 static cam_status
1133 daregister(struct cam_periph *periph, void *arg)
1134 {
1135 	struct da_softc *softc;
1136 	struct ccb_pathinq cpi;
1137 	struct ccb_getdev *cgd;
1138 	char tmpstr[80];
1139 	caddr_t match;
1140 
1141 	cgd = (struct ccb_getdev *)arg;
1142 	if (periph == NULL) {
1143 		printf("daregister: periph was NULL!!\n");
1144 		return(CAM_REQ_CMP_ERR);
1145 	}
1146 
1147 	if (cgd == NULL) {
1148 		printf("daregister: no getdev CCB, can't register device\n");
1149 		return(CAM_REQ_CMP_ERR);
1150 	}
1151 
1152 	softc = (struct da_softc *)malloc(sizeof(*softc), M_DEVBUF,
1153 	    M_NOWAIT|M_ZERO);
1154 
1155 	if (softc == NULL) {
1156 		printf("daregister: Unable to probe new device. "
1157 		       "Unable to allocate softc\n");
1158 		return(CAM_REQ_CMP_ERR);
1159 	}
1160 
1161 	LIST_INIT(&softc->pending_ccbs);
1162 	softc->state = DA_STATE_PROBE;
1163 	bioq_init(&softc->bio_queue);
1164 	if (SID_IS_REMOVABLE(&cgd->inq_data))
1165 		softc->flags |= DA_FLAG_PACK_REMOVABLE;
1166 	if ((cgd->inq_data.flags & SID_CmdQue) != 0)
1167 		softc->flags |= DA_FLAG_TAGGED_QUEUING;
1168 
1169 	periph->softc = softc;
1170 
1171 	/*
1172 	 * See if this device has any quirks.
1173 	 */
1174 	match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1175 			       (caddr_t)da_quirk_table,
1176 			       sizeof(da_quirk_table)/sizeof(*da_quirk_table),
1177 			       sizeof(*da_quirk_table), scsi_inquiry_match);
1178 
1179 	if (match != NULL)
1180 		softc->quirks = ((struct da_quirk_entry *)match)->quirks;
1181 	else
1182 		softc->quirks = DA_Q_NONE;
1183 
1184 	/* Check if the SIM does not want 6 byte commands */
1185 	xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
1186 	cpi.ccb_h.func_code = XPT_PATH_INQ;
1187 	xpt_action((union ccb *)&cpi);
1188 	if (cpi.ccb_h.status == CAM_REQ_CMP && (cpi.hba_misc & PIM_NO_6_BYTE))
1189 		softc->quirks |= DA_Q_NO_6_BYTE;
1190 
1191 	TASK_INIT(&softc->sysctl_task, 0, dasysctlinit, periph);
1192 
1193 	/*
1194 	 * RBC devices don't have to support READ(6), only READ(10).
1195 	 */
1196 	if (softc->quirks & DA_Q_NO_6_BYTE || SID_TYPE(&cgd->inq_data) == T_RBC)
1197 		softc->minimum_cmd_size = 10;
1198 	else
1199 		softc->minimum_cmd_size = 6;
1200 
1201 	/*
1202 	 * Load the user's default, if any.
1203 	 */
1204 	snprintf(tmpstr, sizeof(tmpstr), "kern.cam.da.%d.minimum_cmd_size",
1205 		 periph->unit_number);
1206 	TUNABLE_INT_FETCH(tmpstr, &softc->minimum_cmd_size);
1207 
1208 	/*
1209 	 * 6, 10, 12 and 16 are the currently permissible values.
1210 	 */
1211 	if (softc->minimum_cmd_size < 6)
1212 		softc->minimum_cmd_size = 6;
1213 	else if ((softc->minimum_cmd_size > 6)
1214 	      && (softc->minimum_cmd_size <= 10))
1215 		softc->minimum_cmd_size = 10;
1216 	else if ((softc->minimum_cmd_size > 10)
1217 	      && (softc->minimum_cmd_size <= 12))
1218 		softc->minimum_cmd_size = 12;
1219 	else if (softc->minimum_cmd_size > 12)
1220 		softc->minimum_cmd_size = 16;
1221 
1222 	/*
1223 	 * Register this media as a disk
1224 	 */
1225 
1226 	mtx_unlock(periph->sim->mtx);
1227 	softc->disk = disk_alloc();
1228 	softc->disk->d_open = daopen;
1229 	softc->disk->d_close = daclose;
1230 	softc->disk->d_strategy = dastrategy;
1231 	softc->disk->d_dump = dadump;
1232 	softc->disk->d_name = "da";
1233 	softc->disk->d_drv1 = periph;
1234 	softc->disk->d_maxsize = DFLTPHYS; /* XXX: probably not arbitrary */
1235 	softc->disk->d_unit = periph->unit_number;
1236 	softc->disk->d_flags = 0;
1237 	if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0)
1238 		softc->disk->d_flags |= DISKFLAG_CANFLUSHCACHE;
1239 	disk_create(softc->disk, DISK_VERSION);
1240 	mtx_lock(periph->sim->mtx);
1241 
1242 	/*
1243 	 * Add async callbacks for bus reset and
1244 	 * bus device reset calls.  I don't bother
1245 	 * checking if this fails as, in most cases,
1246 	 * the system will function just fine without
1247 	 * them and the only alternative would be to
1248 	 * not attach the device on failure.
1249 	 */
1250 	xpt_register_async(AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE,
1251 			   daasync, periph, periph->path);
1252 
1253 	/*
1254 	 * Take an exclusive refcount on the periph while dastart is called
1255 	 * to finish the probe.  The reference will be dropped in dadone at
1256 	 * the end of probe.
1257 	 */
1258 	(void)cam_periph_hold(periph, PRIBIO);
1259 	xpt_schedule(periph, /*priority*/5);
1260 
1261 	/*
1262 	 * Schedule a periodic event to occasionally send an
1263 	 * ordered tag to a device.
1264 	 */
1265 	callout_init_mtx(&softc->sendordered_c, periph->sim->mtx, 0);
1266 	callout_reset(&softc->sendordered_c,
1267 	    (DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL,
1268 	    dasendorderedtag, softc);
1269 
1270 	return(CAM_REQ_CMP);
1271 }
1272 
1273 static void
1274 dastart(struct cam_periph *periph, union ccb *start_ccb)
1275 {
1276 	struct da_softc *softc;
1277 
1278 	softc = (struct da_softc *)periph->softc;
1279 
1280 	switch (softc->state) {
1281 	case DA_STATE_NORMAL:
1282 	{
1283 		/* Pull a buffer from the queue and get going on it */
1284 		struct bio *bp;
1285 
1286 		/*
1287 		 * See if there is a buf with work for us to do..
1288 		 */
1289 		bp = bioq_first(&softc->bio_queue);
1290 		if (periph->immediate_priority <= periph->pinfo.priority) {
1291 			CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1292 					("queuing for immediate ccb\n"));
1293 			start_ccb->ccb_h.ccb_state = DA_CCB_WAITING;
1294 			SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1295 					  periph_links.sle);
1296 			periph->immediate_priority = CAM_PRIORITY_NONE;
1297 			wakeup(&periph->ccb_list);
1298 		} else if (bp == NULL) {
1299 			xpt_release_ccb(start_ccb);
1300 		} else {
1301 			u_int8_t tag_code;
1302 
1303 			bioq_remove(&softc->bio_queue, bp);
1304 
1305 			if ((softc->flags & DA_FLAG_NEED_OTAG) != 0) {
1306 				softc->flags &= ~DA_FLAG_NEED_OTAG;
1307 				softc->ordered_tag_count++;
1308 				tag_code = MSG_ORDERED_Q_TAG;
1309 			} else {
1310 				tag_code = MSG_SIMPLE_Q_TAG;
1311 			}
1312 			switch (bp->bio_cmd) {
1313 			case BIO_READ:
1314 			case BIO_WRITE:
1315 				scsi_read_write(&start_ccb->csio,
1316 						/*retries*/da_retry_count,
1317 						/*cbfcnp*/dadone,
1318 						/*tag_action*/tag_code,
1319 						/*read_op*/bp->bio_cmd == BIO_READ,
1320 						/*byte2*/0,
1321 						softc->minimum_cmd_size,
1322 						/*lba*/bp->bio_pblkno,
1323 						/*block_count*/bp->bio_bcount /
1324 						softc->params.secsize,
1325 						/*data_ptr*/ bp->bio_data,
1326 						/*dxfer_len*/ bp->bio_bcount,
1327 						/*sense_len*/SSD_FULL_SIZE,
1328 						/*timeout*/da_default_timeout*1000);
1329 				break;
1330 			case BIO_FLUSH:
1331 				scsi_synchronize_cache(&start_ccb->csio,
1332 						       /*retries*/1,
1333 						       /*cbfcnp*/dadone,
1334 						       MSG_SIMPLE_Q_TAG,
1335 						       /*begin_lba*/0,/* Cover the whole disk */
1336 						       /*lb_count*/0,
1337 						       SSD_FULL_SIZE,
1338 						       /*timeout*/da_default_timeout*1000);
1339 				break;
1340 			}
1341 			start_ccb->ccb_h.ccb_state = DA_CCB_BUFFER_IO;
1342 
1343 			/*
1344 			 * Block out any asyncronous callbacks
1345 			 * while we touch the pending ccb list.
1346 			 */
1347 			LIST_INSERT_HEAD(&softc->pending_ccbs,
1348 					 &start_ccb->ccb_h, periph_links.le);
1349 			softc->outstanding_cmds++;
1350 
1351 			/* We expect a unit attention from this device */
1352 			if ((softc->flags & DA_FLAG_RETRY_UA) != 0) {
1353 				start_ccb->ccb_h.ccb_state |= DA_CCB_RETRY_UA;
1354 				softc->flags &= ~DA_FLAG_RETRY_UA;
1355 			}
1356 
1357 			start_ccb->ccb_h.ccb_bp = bp;
1358 			bp = bioq_first(&softc->bio_queue);
1359 
1360 			xpt_action(start_ccb);
1361 		}
1362 
1363 		if (bp != NULL) {
1364 			/* Have more work to do, so ensure we stay scheduled */
1365 			xpt_schedule(periph, /* XXX priority */1);
1366 		}
1367 		break;
1368 	}
1369 	case DA_STATE_PROBE:
1370 	{
1371 		struct ccb_scsiio *csio;
1372 		struct scsi_read_capacity_data *rcap;
1373 
1374 		rcap = (struct scsi_read_capacity_data *)
1375 		    malloc(sizeof(*rcap), M_SCSIDA, M_NOWAIT|M_ZERO);
1376 		if (rcap == NULL) {
1377 			printf("dastart: Couldn't malloc read_capacity data\n");
1378 			/* da_free_periph??? */
1379 			break;
1380 		}
1381 		csio = &start_ccb->csio;
1382 		scsi_read_capacity(csio,
1383 				   /*retries*/4,
1384 				   dadone,
1385 				   MSG_SIMPLE_Q_TAG,
1386 				   rcap,
1387 				   SSD_FULL_SIZE,
1388 				   /*timeout*/5000);
1389 		start_ccb->ccb_h.ccb_bp = NULL;
1390 		start_ccb->ccb_h.ccb_state = DA_CCB_PROBE;
1391 		xpt_action(start_ccb);
1392 		break;
1393 	}
1394 	case DA_STATE_PROBE2:
1395 	{
1396 		struct ccb_scsiio *csio;
1397 		struct scsi_read_capacity_data_long *rcaplong;
1398 
1399 		rcaplong = (struct scsi_read_capacity_data_long *)
1400 			malloc(sizeof(*rcaplong), M_SCSIDA, M_NOWAIT|M_ZERO);
1401 		if (rcaplong == NULL) {
1402 			printf("dastart: Couldn't malloc read_capacity data\n");
1403 			/* da_free_periph??? */
1404 			break;
1405 		}
1406 		csio = &start_ccb->csio;
1407 		scsi_read_capacity_16(csio,
1408 				      /*retries*/ 4,
1409 				      /*cbfcnp*/ dadone,
1410 				      /*tag_action*/ MSG_SIMPLE_Q_TAG,
1411 				      /*lba*/ 0,
1412 				      /*reladr*/ 0,
1413 				      /*pmi*/ 0,
1414 				      rcaplong,
1415 				      /*sense_len*/ SSD_FULL_SIZE,
1416 				      /*timeout*/ 60000);
1417 		start_ccb->ccb_h.ccb_bp = NULL;
1418 		start_ccb->ccb_h.ccb_state = DA_CCB_PROBE2;
1419 		xpt_action(start_ccb);
1420 		break;
1421 	}
1422 	}
1423 }
1424 
1425 static int
1426 cmd6workaround(union ccb *ccb)
1427 {
1428 	struct scsi_rw_6 cmd6;
1429 	struct scsi_rw_10 *cmd10;
1430 	struct da_softc *softc;
1431 	u_int8_t *cdb;
1432 	int frozen;
1433 
1434 	cdb = ccb->csio.cdb_io.cdb_bytes;
1435 
1436 	/* Translation only possible if CDB is an array and cmd is R/W6 */
1437 	if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0 ||
1438 	    (*cdb != READ_6 && *cdb != WRITE_6))
1439 		return 0;
1440 
1441 	xpt_print(ccb->ccb_h.path, "READ(6)/WRITE(6) not supported, "
1442 	    "increasing minimum_cmd_size to 10.\n");
1443  	softc = (struct da_softc *)xpt_path_periph(ccb->ccb_h.path)->softc;
1444 	softc->minimum_cmd_size = 10;
1445 
1446 	bcopy(cdb, &cmd6, sizeof(struct scsi_rw_6));
1447 	cmd10 = (struct scsi_rw_10 *)cdb;
1448 	cmd10->opcode = (cmd6.opcode == READ_6) ? READ_10 : WRITE_10;
1449 	cmd10->byte2 = 0;
1450 	scsi_ulto4b(scsi_3btoul(cmd6.addr), cmd10->addr);
1451 	cmd10->reserved = 0;
1452 	scsi_ulto2b(cmd6.length, cmd10->length);
1453 	cmd10->control = cmd6.control;
1454 	ccb->csio.cdb_len = sizeof(*cmd10);
1455 
1456 	/* Requeue request, unfreezing queue if necessary */
1457 	frozen = (ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
1458  	ccb->ccb_h.status = CAM_REQUEUE_REQ;
1459 	xpt_action(ccb);
1460 	if (frozen) {
1461 		cam_release_devq(ccb->ccb_h.path,
1462 				 /*relsim_flags*/0,
1463 				 /*reduction*/0,
1464 				 /*timeout*/0,
1465 				 /*getcount_only*/0);
1466 	}
1467 	return (ERESTART);
1468 }
1469 
1470 static void
1471 dadone(struct cam_periph *periph, union ccb *done_ccb)
1472 {
1473 	struct da_softc *softc;
1474 	struct ccb_scsiio *csio;
1475 
1476 	softc = (struct da_softc *)periph->softc;
1477 	csio = &done_ccb->csio;
1478 	switch (csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) {
1479 	case DA_CCB_BUFFER_IO:
1480 	{
1481 		struct bio *bp;
1482 
1483 		bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
1484 		if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1485 			int error;
1486 			int sf;
1487 
1488 			if ((csio->ccb_h.ccb_state & DA_CCB_RETRY_UA) != 0)
1489 				sf = SF_RETRY_UA;
1490 			else
1491 				sf = 0;
1492 
1493 			error = daerror(done_ccb, CAM_RETRY_SELTO, sf);
1494 			if (error == ERESTART) {
1495 				/*
1496 				 * A retry was scheuled, so
1497 				 * just return.
1498 				 */
1499 				return;
1500 			}
1501 			if (error != 0) {
1502 
1503 				if (error == ENXIO) {
1504 					/*
1505 					 * Catastrophic error.  Mark our pack as
1506 					 * invalid.
1507 					 */
1508 					/*
1509 					 * XXX See if this is really a media
1510 					 * XXX change first?
1511 					 */
1512 					xpt_print(periph->path,
1513 					    "Invalidating pack\n");
1514 					softc->flags |= DA_FLAG_PACK_INVALID;
1515 				}
1516 
1517 				/*
1518 				 * return all queued I/O with EIO, so that
1519 				 * the client can retry these I/Os in the
1520 				 * proper order should it attempt to recover.
1521 				 */
1522 				bioq_flush(&softc->bio_queue, NULL, EIO);
1523 				bp->bio_error = error;
1524 				bp->bio_resid = bp->bio_bcount;
1525 				bp->bio_flags |= BIO_ERROR;
1526 			} else {
1527 				bp->bio_resid = csio->resid;
1528 				bp->bio_error = 0;
1529 				if (bp->bio_resid != 0)
1530 					bp->bio_flags |= BIO_ERROR;
1531 			}
1532 			if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1533 				cam_release_devq(done_ccb->ccb_h.path,
1534 						 /*relsim_flags*/0,
1535 						 /*reduction*/0,
1536 						 /*timeout*/0,
1537 						 /*getcount_only*/0);
1538 		} else {
1539 			if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1540 				panic("REQ_CMP with QFRZN");
1541 			bp->bio_resid = csio->resid;
1542 			if (csio->resid > 0)
1543 				bp->bio_flags |= BIO_ERROR;
1544 		}
1545 
1546 		/*
1547 		 * Block out any asyncronous callbacks
1548 		 * while we touch the pending ccb list.
1549 		 */
1550 		LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
1551 		softc->outstanding_cmds--;
1552 		if (softc->outstanding_cmds == 0)
1553 			softc->flags |= DA_FLAG_WENT_IDLE;
1554 
1555 		biodone(bp);
1556 		break;
1557 	}
1558 	case DA_CCB_PROBE:
1559 	case DA_CCB_PROBE2:
1560 	{
1561 		struct	   scsi_read_capacity_data *rdcap;
1562 		struct     scsi_read_capacity_data_long *rcaplong;
1563 		char	   announce_buf[80];
1564 
1565 		rdcap = NULL;
1566 		rcaplong = NULL;
1567 		if (softc->state == DA_STATE_PROBE)
1568 			rdcap =(struct scsi_read_capacity_data *)csio->data_ptr;
1569 		else
1570 			rcaplong = (struct scsi_read_capacity_data_long *)
1571 				csio->data_ptr;
1572 
1573 		if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
1574 			struct disk_params *dp;
1575 			uint32_t block_size;
1576 			uint64_t maxsector;
1577 
1578 			if (softc->state == DA_STATE_PROBE) {
1579 				block_size = scsi_4btoul(rdcap->length);
1580 				maxsector = scsi_4btoul(rdcap->addr);
1581 
1582 				/*
1583 				 * According to SBC-2, if the standard 10
1584 				 * byte READ CAPACITY command returns 2^32,
1585 				 * we should issue the 16 byte version of
1586 				 * the command, since the device in question
1587 				 * has more sectors than can be represented
1588 				 * with the short version of the command.
1589 				 */
1590 				if (maxsector == 0xffffffff) {
1591 					softc->state = DA_STATE_PROBE2;
1592 					free(rdcap, M_SCSIDA);
1593 					xpt_release_ccb(done_ccb);
1594 					xpt_schedule(periph, /*priority*/5);
1595 					return;
1596 				}
1597 			} else {
1598 				block_size = scsi_4btoul(rcaplong->length);
1599 				maxsector = scsi_8btou64(rcaplong->addr);
1600 			}
1601 
1602 			/*
1603 			 * Because GEOM code just will panic us if we
1604 			 * give them an 'illegal' value we'll avoid that
1605 			 * here.
1606 			 */
1607 			if (block_size >= MAXPHYS || block_size == 0) {
1608 				xpt_print(periph->path,
1609 				    "unsupportable block size %ju\n",
1610 				    (uintmax_t) block_size);
1611 				announce_buf[0] = '\0';
1612 				cam_periph_invalidate(periph);
1613 			} else {
1614 				dasetgeom(periph, block_size, maxsector);
1615 				dp = &softc->params;
1616 				snprintf(announce_buf, sizeof(announce_buf),
1617 				        "%juMB (%ju %u byte sectors: %dH %dS/T "
1618                                         "%dC)", (uintmax_t)
1619 	                                (((uintmax_t)dp->secsize *
1620 				        dp->sectors) / (1024*1024)),
1621 			                (uintmax_t)dp->sectors,
1622 				        dp->secsize, dp->heads,
1623                                         dp->secs_per_track, dp->cylinders);
1624 			}
1625 		} else {
1626 			int	error;
1627 
1628 			announce_buf[0] = '\0';
1629 
1630 			/*
1631 			 * Retry any UNIT ATTENTION type errors.  They
1632 			 * are expected at boot.
1633 			 */
1634 			error = daerror(done_ccb, CAM_RETRY_SELTO,
1635 					SF_RETRY_UA|SF_NO_PRINT);
1636 			if (error == ERESTART) {
1637 				/*
1638 				 * A retry was scheuled, so
1639 				 * just return.
1640 				 */
1641 				return;
1642 			} else if (error != 0) {
1643 				struct scsi_sense_data *sense;
1644 				int asc, ascq;
1645 				int sense_key, error_code;
1646 				int have_sense;
1647 				cam_status status;
1648 				struct ccb_getdev cgd;
1649 
1650 				/* Don't wedge this device's queue */
1651 				status = done_ccb->ccb_h.status;
1652 				if ((status & CAM_DEV_QFRZN) != 0)
1653 					cam_release_devq(done_ccb->ccb_h.path,
1654 							 /*relsim_flags*/0,
1655 							 /*reduction*/0,
1656 							 /*timeout*/0,
1657 							 /*getcount_only*/0);
1658 
1659 
1660 				xpt_setup_ccb(&cgd.ccb_h,
1661 					      done_ccb->ccb_h.path,
1662 					      /* priority */ 1);
1663 				cgd.ccb_h.func_code = XPT_GDEV_TYPE;
1664 				xpt_action((union ccb *)&cgd);
1665 
1666 				if (((csio->ccb_h.flags & CAM_SENSE_PHYS) != 0)
1667 				 || ((csio->ccb_h.flags & CAM_SENSE_PTR) != 0)
1668 				 || ((status & CAM_AUTOSNS_VALID) == 0))
1669 					have_sense = FALSE;
1670 				else
1671 					have_sense = TRUE;
1672 
1673 				if (have_sense) {
1674 					sense = &csio->sense_data;
1675 					scsi_extract_sense(sense, &error_code,
1676 							   &sense_key,
1677 							   &asc, &ascq);
1678 				}
1679 				/*
1680 				 * Attach to anything that claims to be a
1681 				 * direct access or optical disk device,
1682 				 * as long as it doesn't return a "Logical
1683 				 * unit not supported" (0x25) error.
1684 				 */
1685 				if ((have_sense) && (asc != 0x25)
1686 				 && (error_code == SSD_CURRENT_ERROR)) {
1687 					const char *sense_key_desc;
1688 					const char *asc_desc;
1689 
1690 					scsi_sense_desc(sense_key, asc, ascq,
1691 							&cgd.inq_data,
1692 							&sense_key_desc,
1693 							&asc_desc);
1694 					snprintf(announce_buf,
1695 					    sizeof(announce_buf),
1696 						"Attempt to query device "
1697 						"size failed: %s, %s",
1698 						sense_key_desc,
1699 						asc_desc);
1700 				} else {
1701 					if (have_sense)
1702 						scsi_sense_print(
1703 							&done_ccb->csio);
1704 					else {
1705 						xpt_print(periph->path,
1706 						    "got CAM status %#x\n",
1707 						    done_ccb->ccb_h.status);
1708 					}
1709 
1710 					xpt_print(periph->path, "fatal error, "
1711 					    "failed to attach to device\n");
1712 
1713 					/*
1714 					 * Free up resources.
1715 					 */
1716 					cam_periph_invalidate(periph);
1717 				}
1718 			}
1719 		}
1720 		free(csio->data_ptr, M_SCSIDA);
1721 		if (announce_buf[0] != '\0') {
1722 			xpt_announce_periph(periph, announce_buf);
1723 			/*
1724 			 * Create our sysctl variables, now that we know
1725 			 * we have successfully attached.
1726 			 */
1727 			taskqueue_enqueue(taskqueue_thread,&softc->sysctl_task);
1728 		}
1729 		softc->state = DA_STATE_NORMAL;
1730 		/*
1731 		 * Since our peripheral may be invalidated by an error
1732 		 * above or an external event, we must release our CCB
1733 		 * before releasing the probe lock on the peripheral.
1734 		 * The peripheral will only go away once the last lock
1735 		 * is removed, and we need it around for the CCB release
1736 		 * operation.
1737 		 */
1738 		xpt_release_ccb(done_ccb);
1739 		cam_periph_unhold(periph);
1740 		return;
1741 	}
1742 	case DA_CCB_WAITING:
1743 	{
1744 		/* Caller will release the CCB */
1745 		wakeup(&done_ccb->ccb_h.cbfcnp);
1746 		return;
1747 	}
1748 	case DA_CCB_DUMP:
1749 		/* No-op.  We're polling */
1750 		return;
1751 	default:
1752 		break;
1753 	}
1754 	xpt_release_ccb(done_ccb);
1755 }
1756 
1757 static int
1758 daerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
1759 {
1760 	struct da_softc	  *softc;
1761 	struct cam_periph *periph;
1762 	int error;
1763 
1764 	periph = xpt_path_periph(ccb->ccb_h.path);
1765 	softc = (struct da_softc *)periph->softc;
1766 
1767  	/*
1768 	 * Automatically detect devices that do not support
1769  	 * READ(6)/WRITE(6) and upgrade to using 10 byte cdbs.
1770  	 */
1771 	error = 0;
1772 	if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INVALID) {
1773 		error = cmd6workaround(ccb);
1774 	} else if (((ccb->ccb_h.status & CAM_STATUS_MASK) ==
1775 		   CAM_SCSI_STATUS_ERROR)
1776 	 && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)
1777 	 && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
1778 	 && ((ccb->ccb_h.flags & CAM_SENSE_PHYS) == 0)
1779 	 && ((ccb->ccb_h.flags & CAM_SENSE_PTR) == 0)) {
1780 		int sense_key, error_code, asc, ascq;
1781 
1782  		scsi_extract_sense(&ccb->csio.sense_data,
1783 				   &error_code, &sense_key, &asc, &ascq);
1784 		if (sense_key == SSD_KEY_ILLEGAL_REQUEST)
1785  			error = cmd6workaround(ccb);
1786 	}
1787 	if (error == ERESTART)
1788 		return (ERESTART);
1789 
1790 	/*
1791 	 * XXX
1792 	 * Until we have a better way of doing pack validation,
1793 	 * don't treat UAs as errors.
1794 	 */
1795 	sense_flags |= SF_RETRY_UA;
1796 	return(cam_periph_error(ccb, cam_flags, sense_flags,
1797 				&softc->saved_ccb));
1798 }
1799 
1800 static void
1801 daprevent(struct cam_periph *periph, int action)
1802 {
1803 	struct	da_softc *softc;
1804 	union	ccb *ccb;
1805 	int	error;
1806 
1807 	softc = (struct da_softc *)periph->softc;
1808 
1809 	if (((action == PR_ALLOW)
1810 	  && (softc->flags & DA_FLAG_PACK_LOCKED) == 0)
1811 	 || ((action == PR_PREVENT)
1812 	  && (softc->flags & DA_FLAG_PACK_LOCKED) != 0)) {
1813 		return;
1814 	}
1815 
1816 	ccb = cam_periph_getccb(periph, /*priority*/1);
1817 
1818 	scsi_prevent(&ccb->csio,
1819 		     /*retries*/1,
1820 		     /*cbcfp*/dadone,
1821 		     MSG_SIMPLE_Q_TAG,
1822 		     action,
1823 		     SSD_FULL_SIZE,
1824 		     5000);
1825 
1826 	error = cam_periph_runccb(ccb, /*error_routine*/NULL, CAM_RETRY_SELTO,
1827 				  SF_RETRY_UA, softc->disk->d_devstat);
1828 
1829 	if (error == 0) {
1830 		if (action == PR_ALLOW)
1831 			softc->flags &= ~DA_FLAG_PACK_LOCKED;
1832 		else
1833 			softc->flags |= DA_FLAG_PACK_LOCKED;
1834 	}
1835 
1836 	xpt_release_ccb(ccb);
1837 }
1838 
1839 static int
1840 dagetcapacity(struct cam_periph *periph)
1841 {
1842 	struct da_softc *softc;
1843 	union ccb *ccb;
1844 	struct scsi_read_capacity_data *rcap;
1845 	struct scsi_read_capacity_data_long *rcaplong;
1846 	uint32_t block_len;
1847 	uint64_t maxsector;
1848 	int error;
1849 	u_int32_t sense_flags;
1850 
1851 	softc = (struct da_softc *)periph->softc;
1852 	block_len = 0;
1853 	maxsector = 0;
1854 	error = 0;
1855 	sense_flags = SF_RETRY_UA;
1856 	if (softc->flags & DA_FLAG_PACK_REMOVABLE)
1857 		sense_flags |= SF_NO_PRINT;
1858 
1859 	/* Do a read capacity */
1860 	rcap = (struct scsi_read_capacity_data *)malloc(sizeof(*rcaplong),
1861 							M_SCSIDA,
1862 							M_NOWAIT);
1863 	if (rcap == NULL)
1864 		return (ENOMEM);
1865 
1866 	ccb = cam_periph_getccb(periph, /*priority*/1);
1867 	scsi_read_capacity(&ccb->csio,
1868 			   /*retries*/4,
1869 			   /*cbfncp*/dadone,
1870 			   MSG_SIMPLE_Q_TAG,
1871 			   rcap,
1872 			   SSD_FULL_SIZE,
1873 			   /*timeout*/60000);
1874 	ccb->ccb_h.ccb_bp = NULL;
1875 
1876 	error = cam_periph_runccb(ccb, daerror,
1877 				  /*cam_flags*/CAM_RETRY_SELTO,
1878 				  sense_flags,
1879 				  softc->disk->d_devstat);
1880 
1881 	if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1882 		cam_release_devq(ccb->ccb_h.path,
1883 				 /*relsim_flags*/0,
1884 				 /*reduction*/0,
1885 				 /*timeout*/0,
1886 				 /*getcount_only*/0);
1887 
1888 	if (error == 0) {
1889 		block_len = scsi_4btoul(rcap->length);
1890 		maxsector = scsi_4btoul(rcap->addr);
1891 
1892 		if (maxsector != 0xffffffff)
1893 			goto done;
1894 	} else
1895 		goto done;
1896 
1897 	rcaplong = (struct scsi_read_capacity_data_long *)rcap;
1898 
1899 	scsi_read_capacity_16(&ccb->csio,
1900 			      /*retries*/ 4,
1901 			      /*cbfcnp*/ dadone,
1902 			      /*tag_action*/ MSG_SIMPLE_Q_TAG,
1903 			      /*lba*/ 0,
1904 			      /*reladr*/ 0,
1905 			      /*pmi*/ 0,
1906 			      rcaplong,
1907 			      /*sense_len*/ SSD_FULL_SIZE,
1908 			      /*timeout*/ 60000);
1909 	ccb->ccb_h.ccb_bp = NULL;
1910 
1911 	error = cam_periph_runccb(ccb, daerror,
1912 				  /*cam_flags*/CAM_RETRY_SELTO,
1913 				  sense_flags,
1914 				  softc->disk->d_devstat);
1915 
1916 	if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1917 		cam_release_devq(ccb->ccb_h.path,
1918 				 /*relsim_flags*/0,
1919 				 /*reduction*/0,
1920 				 /*timeout*/0,
1921 				 /*getcount_only*/0);
1922 
1923 	if (error == 0) {
1924 		block_len = scsi_4btoul(rcaplong->length);
1925 		maxsector = scsi_8btou64(rcaplong->addr);
1926 	}
1927 
1928 done:
1929 
1930 	if (error == 0)
1931 		dasetgeom(periph, block_len, maxsector);
1932 
1933 	xpt_release_ccb(ccb);
1934 
1935 	free(rcap, M_SCSIDA);
1936 
1937 	return (error);
1938 }
1939 
1940 static void
1941 dasetgeom(struct cam_periph *periph, uint32_t block_len, uint64_t maxsector)
1942 {
1943 	struct ccb_calc_geometry ccg;
1944 	struct da_softc *softc;
1945 	struct disk_params *dp;
1946 
1947 	softc = (struct da_softc *)periph->softc;
1948 
1949 	dp = &softc->params;
1950 	dp->secsize = block_len;
1951 	dp->sectors = maxsector + 1;
1952 	/*
1953 	 * Have the controller provide us with a geometry
1954 	 * for this disk.  The only time the geometry
1955 	 * matters is when we boot and the controller
1956 	 * is the only one knowledgeable enough to come
1957 	 * up with something that will make this a bootable
1958 	 * device.
1959 	 */
1960 	xpt_setup_ccb(&ccg.ccb_h, periph->path, /*priority*/1);
1961 	ccg.ccb_h.func_code = XPT_CALC_GEOMETRY;
1962 	ccg.block_size = dp->secsize;
1963 	ccg.volume_size = dp->sectors;
1964 	ccg.heads = 0;
1965 	ccg.secs_per_track = 0;
1966 	ccg.cylinders = 0;
1967 	xpt_action((union ccb*)&ccg);
1968 	if ((ccg.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1969 		/*
1970 		 * We don't know what went wrong here- but just pick
1971 		 * a geometry so we don't have nasty things like divide
1972 		 * by zero.
1973 		 */
1974 		dp->heads = 255;
1975 		dp->secs_per_track = 255;
1976 		dp->cylinders = dp->sectors / (255 * 255);
1977 		if (dp->cylinders == 0) {
1978 			dp->cylinders = 1;
1979 		}
1980 	} else {
1981 		dp->heads = ccg.heads;
1982 		dp->secs_per_track = ccg.secs_per_track;
1983 		dp->cylinders = ccg.cylinders;
1984 	}
1985 }
1986 
1987 static void
1988 dasendorderedtag(void *arg)
1989 {
1990 	struct da_softc *softc = arg;
1991 
1992 	if (da_send_ordered) {
1993 		if ((softc->ordered_tag_count == 0)
1994 		 && ((softc->flags & DA_FLAG_WENT_IDLE) == 0)) {
1995 			softc->flags |= DA_FLAG_NEED_OTAG;
1996 		}
1997 		if (softc->outstanding_cmds > 0)
1998 			softc->flags &= ~DA_FLAG_WENT_IDLE;
1999 
2000 		softc->ordered_tag_count = 0;
2001 	}
2002 	/* Queue us up again */
2003 	callout_reset(&softc->sendordered_c,
2004 	    (DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL,
2005 	    dasendorderedtag, softc);
2006 }
2007 
2008 /*
2009  * Step through all DA peripheral drivers, and if the device is still open,
2010  * sync the disk cache to physical media.
2011  */
2012 static void
2013 dashutdown(void * arg, int howto)
2014 {
2015 	struct cam_periph *periph;
2016 	struct da_softc *softc;
2017 
2018 	TAILQ_FOREACH(periph, &dadriver.units, unit_links) {
2019 		union ccb ccb;
2020 
2021 		cam_periph_lock(periph);
2022 		softc = (struct da_softc *)periph->softc;
2023 
2024 		/*
2025 		 * We only sync the cache if the drive is still open, and
2026 		 * if the drive is capable of it..
2027 		 */
2028 		if (((softc->flags & DA_FLAG_OPEN) == 0)
2029 		 || (softc->quirks & DA_Q_NO_SYNC_CACHE)) {
2030 			cam_periph_unlock(periph);
2031 			continue;
2032 		}
2033 
2034 		xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/1);
2035 
2036 		ccb.ccb_h.ccb_state = DA_CCB_DUMP;
2037 		scsi_synchronize_cache(&ccb.csio,
2038 				       /*retries*/1,
2039 				       /*cbfcnp*/dadone,
2040 				       MSG_SIMPLE_Q_TAG,
2041 				       /*begin_lba*/0, /* whole disk */
2042 				       /*lb_count*/0,
2043 				       SSD_FULL_SIZE,
2044 				       60 * 60 * 1000);
2045 
2046 		xpt_polled_action(&ccb);
2047 
2048 		if ((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
2049 			if (((ccb.ccb_h.status & CAM_STATUS_MASK) ==
2050 			     CAM_SCSI_STATUS_ERROR)
2051 			 && (ccb.csio.scsi_status == SCSI_STATUS_CHECK_COND)){
2052 				int error_code, sense_key, asc, ascq;
2053 
2054 				scsi_extract_sense(&ccb.csio.sense_data,
2055 						   &error_code, &sense_key,
2056 						   &asc, &ascq);
2057 
2058 				if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
2059 					scsi_sense_print(&ccb.csio);
2060 			} else {
2061 				xpt_print(periph->path, "Synchronize "
2062 				    "cache failed, status == 0x%x, scsi status "
2063 				    "== 0x%x\n", ccb.ccb_h.status,
2064 				    ccb.csio.scsi_status);
2065 			}
2066 		}
2067 
2068 		if ((ccb.ccb_h.status & CAM_DEV_QFRZN) != 0)
2069 			cam_release_devq(ccb.ccb_h.path,
2070 					 /*relsim_flags*/0,
2071 					 /*reduction*/0,
2072 					 /*timeout*/0,
2073 					 /*getcount_only*/0);
2074 		cam_periph_unlock(periph);
2075 	}
2076 }
2077 
2078 #else /* !_KERNEL */
2079 
2080 /*
2081  * XXX This is only left out of the kernel build to silence warnings.  If,
2082  * for some reason this function is used in the kernel, the ifdefs should
2083  * be moved so it is included both in the kernel and userland.
2084  */
2085 void
2086 scsi_format_unit(struct ccb_scsiio *csio, u_int32_t retries,
2087 		 void (*cbfcnp)(struct cam_periph *, union ccb *),
2088 		 u_int8_t tag_action, u_int8_t byte2, u_int16_t ileave,
2089 		 u_int8_t *data_ptr, u_int32_t dxfer_len, u_int8_t sense_len,
2090 		 u_int32_t timeout)
2091 {
2092 	struct scsi_format_unit *scsi_cmd;
2093 
2094 	scsi_cmd = (struct scsi_format_unit *)&csio->cdb_io.cdb_bytes;
2095 	scsi_cmd->opcode = FORMAT_UNIT;
2096 	scsi_cmd->byte2 = byte2;
2097 	scsi_ulto2b(ileave, scsi_cmd->interleave);
2098 
2099 	cam_fill_csio(csio,
2100 		      retries,
2101 		      cbfcnp,
2102 		      /*flags*/ (dxfer_len > 0) ? CAM_DIR_OUT : CAM_DIR_NONE,
2103 		      tag_action,
2104 		      data_ptr,
2105 		      dxfer_len,
2106 		      sense_len,
2107 		      sizeof(*scsi_cmd),
2108 		      timeout);
2109 }
2110 
2111 #endif /* _KERNEL */
2112