xref: /freebsd/sys/cam/scsi/scsi_da.c (revision 78007886c995898a9494648343e5236bca1cbba3)
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 #endif /* _KERNEL */
43 
44 #include <sys/devicestat.h>
45 #include <sys/conf.h>
46 #include <sys/eventhandler.h>
47 #include <sys/malloc.h>
48 #include <sys/cons.h>
49 
50 #include <machine/md_var.h>
51 
52 #include <vm/vm.h>
53 #include <vm/pmap.h>
54 
55 #include <geom/geom_disk.h>
56 
57 #ifndef _KERNEL
58 #include <stdio.h>
59 #include <string.h>
60 #endif /* _KERNEL */
61 
62 #include <cam/cam.h>
63 #include <cam/cam_ccb.h>
64 #include <cam/cam_periph.h>
65 #include <cam/cam_xpt_periph.h>
66 #include <cam/cam_sim.h>
67 
68 #include <cam/scsi/scsi_message.h>
69 
70 #ifndef _KERNEL
71 #include <cam/scsi/scsi_da.h>
72 #endif /* !_KERNEL */
73 
74 #ifdef _KERNEL
75 typedef enum {
76 	DA_STATE_PROBE,
77 	DA_STATE_PROBE2,
78 	DA_STATE_NORMAL
79 } da_state;
80 
81 typedef enum {
82 	DA_FLAG_PACK_INVALID	= 0x001,
83 	DA_FLAG_NEW_PACK	= 0x002,
84 	DA_FLAG_PACK_LOCKED	= 0x004,
85 	DA_FLAG_PACK_REMOVABLE	= 0x008,
86 	DA_FLAG_TAGGED_QUEUING	= 0x010,
87 	DA_FLAG_NEED_OTAG	= 0x020,
88 	DA_FLAG_WENT_IDLE	= 0x040,
89 	DA_FLAG_RETRY_UA	= 0x080,
90 	DA_FLAG_OPEN		= 0x100,
91 	DA_FLAG_SCTX_INIT	= 0x200
92 } da_flags;
93 
94 typedef enum {
95 	DA_Q_NONE		= 0x00,
96 	DA_Q_NO_SYNC_CACHE	= 0x01,
97 	DA_Q_NO_6_BYTE		= 0x02,
98 	DA_Q_NO_PREVENT		= 0x04
99 } da_quirks;
100 
101 typedef enum {
102 	DA_CCB_PROBE		= 0x01,
103 	DA_CCB_PROBE2		= 0x02,
104 	DA_CCB_BUFFER_IO	= 0x03,
105 	DA_CCB_WAITING		= 0x04,
106 	DA_CCB_DUMP		= 0x05,
107 	DA_CCB_TYPE_MASK	= 0x0F,
108 	DA_CCB_RETRY_UA		= 0x10
109 } da_ccb_state;
110 
111 /* Offsets into our private area for storing information */
112 #define ccb_state	ppriv_field0
113 #define ccb_bp		ppriv_ptr1
114 
115 struct disk_params {
116 	u_int8_t  heads;
117 	u_int32_t cylinders;
118 	u_int8_t  secs_per_track;
119 	u_int32_t secsize;	/* Number of bytes/sector */
120 	u_int64_t sectors;	/* total number sectors */
121 };
122 
123 struct da_softc {
124 	struct	 bio_queue_head bio_queue;
125 	SLIST_ENTRY(da_softc) links;
126 	LIST_HEAD(, ccb_hdr) pending_ccbs;
127 	da_state state;
128 	da_flags flags;
129 	da_quirks quirks;
130 	int	 minimum_cmd_size;
131 	int	 ordered_tag_count;
132 	int	 outstanding_cmds;
133 	struct	 disk_params params;
134 	struct	 disk *disk;
135 	union	 ccb saved_ccb;
136 	struct task		sysctl_task;
137 	struct sysctl_ctx_list	sysctl_ctx;
138 	struct sysctl_oid	*sysctl_tree;
139 	struct callout		sendordered_c;
140 };
141 
142 struct da_quirk_entry {
143 	struct scsi_inquiry_pattern inq_pat;
144 	da_quirks quirks;
145 };
146 
147 static const char quantum[] = "QUANTUM";
148 static const char microp[] = "MICROP";
149 
150 static struct da_quirk_entry da_quirk_table[] =
151 {
152 	/* SPI, FC devices */
153 	{
154 		/*
155 		 * Fujitsu M2513A MO drives.
156 		 * Tested devices: M2513A2 firmware versions 1200 & 1300.
157 		 * (dip switch selects whether T_DIRECT or T_OPTICAL device)
158 		 * Reported by: W.Scholten <whs@xs4all.nl>
159 		 */
160 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
161 		/*quirks*/ DA_Q_NO_SYNC_CACHE
162 	},
163 	{
164 		/* See above. */
165 		{T_OPTICAL, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
166 		/*quirks*/ DA_Q_NO_SYNC_CACHE
167 	},
168 	{
169 		/*
170 		 * This particular Fujitsu drive doesn't like the
171 		 * synchronize cache command.
172 		 * Reported by: Tom Jackson <toj@gorilla.net>
173 		 */
174 		{T_DIRECT, SIP_MEDIA_FIXED, "FUJITSU", "M2954*", "*"},
175 		/*quirks*/ DA_Q_NO_SYNC_CACHE
176 	},
177 	{
178 		/*
179 		 * This drive doesn't like the synchronize cache command
180 		 * either.  Reported by: Matthew Jacob <mjacob@feral.com>
181 		 * in NetBSD PR kern/6027, August 24, 1998.
182 		 */
183 		{T_DIRECT, SIP_MEDIA_FIXED, microp, "2217*", "*"},
184 		/*quirks*/ DA_Q_NO_SYNC_CACHE
185 	},
186 	{
187 		/*
188 		 * This drive doesn't like the synchronize cache command
189 		 * either.  Reported by: Hellmuth Michaelis (hm@kts.org)
190 		 * (PR 8882).
191 		 */
192 		{T_DIRECT, SIP_MEDIA_FIXED, microp, "2112*", "*"},
193 		/*quirks*/ DA_Q_NO_SYNC_CACHE
194 	},
195 	{
196 		/*
197 		 * Doesn't like the synchronize cache command.
198 		 * Reported by: Blaz Zupan <blaz@gold.amis.net>
199 		 */
200 		{T_DIRECT, SIP_MEDIA_FIXED, "NEC", "D3847*", "*"},
201 		/*quirks*/ DA_Q_NO_SYNC_CACHE
202 	},
203 	{
204 		/*
205 		 * Doesn't like the synchronize cache command.
206 		 * Reported by: Blaz Zupan <blaz@gold.amis.net>
207 		 */
208 		{T_DIRECT, SIP_MEDIA_FIXED, quantum, "MAVERICK 540S", "*"},
209 		/*quirks*/ DA_Q_NO_SYNC_CACHE
210 	},
211 	{
212 		/*
213 		 * Doesn't like the synchronize cache command.
214 		 */
215 		{T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS525S", "*"},
216 		/*quirks*/ DA_Q_NO_SYNC_CACHE
217 	},
218 	{
219 		/*
220 		 * Doesn't like the synchronize cache command.
221 		 * Reported by: walter@pelissero.de
222 		 */
223 		{T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS540S", "*"},
224 		/*quirks*/ DA_Q_NO_SYNC_CACHE
225 	},
226 	{
227 		/*
228 		 * Doesn't work correctly with 6 byte reads/writes.
229 		 * Returns illegal request, and points to byte 9 of the
230 		 * 6-byte CDB.
231 		 * Reported by:  Adam McDougall <bsdx@spawnet.com>
232 		 */
233 		{T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 4*", "*"},
234 		/*quirks*/ DA_Q_NO_6_BYTE
235 	},
236 	{
237 		/* See above. */
238 		{T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 2*", "*"},
239 		/*quirks*/ DA_Q_NO_6_BYTE
240 	},
241 	{
242 		/*
243 		 * Doesn't like the synchronize cache command.
244 		 * Reported by: walter@pelissero.de
245 		 */
246 		{T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CP3500*", "*"},
247 		/*quirks*/ DA_Q_NO_SYNC_CACHE
248 	},
249 	{
250 		/*
251 		 * The CISS RAID controllers do not support SYNC_CACHE
252 		 */
253 		{T_DIRECT, SIP_MEDIA_FIXED, "COMPAQ", "RAID*", "*"},
254 		/*quirks*/ DA_Q_NO_SYNC_CACHE
255 	},
256 	/* USB mass storage devices supported by umass(4) */
257 	{
258 		/*
259 		 * EXATELECOM (Sigmatel) i-Bead 100/105 USB Flash MP3 Player
260 		 * PR: kern/51675
261 		 */
262 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "EXATEL", "i-BEAD10*", "*"},
263 		/*quirks*/ DA_Q_NO_SYNC_CACHE
264 	},
265 	{
266 		/*
267 		 * Power Quotient Int. (PQI) USB flash key
268 		 * PR: kern/53067
269 		 */
270 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Generic*", "USB Flash Disk*",
271 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
272 	},
273  	{
274  		/*
275  		 * Creative Nomad MUVO mp3 player (USB)
276  		 * PR: kern/53094
277  		 */
278  		{T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "NOMAD_MUVO", "*"},
279  		/*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
280  	},
281 	{
282 		/*
283 		 * Jungsoft NEXDISK USB flash key
284 		 * PR: kern/54737
285 		 */
286 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "JUNGSOFT", "NEXDISK*", "*"},
287 		/*quirks*/ DA_Q_NO_SYNC_CACHE
288 	},
289 	{
290 		/*
291 		 * FreeDik USB Mini Data Drive
292 		 * PR: kern/54786
293 		 */
294 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "FreeDik*", "Mini Data Drive",
295 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
296 	},
297 	{
298 		/*
299 		 * Sigmatel USB Flash MP3 Player
300 		 * PR: kern/57046
301 		 */
302 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "SigmaTel", "MSCN", "*"},
303 		/*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
304 	},
305 	{
306 		/*
307 		 * Neuros USB Digital Audio Computer
308 		 * PR: kern/63645
309 		 */
310 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "NEUROS", "dig. audio comp.",
311 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
312 	},
313 	{
314 		/*
315 		 * SEAGRAND NP-900 MP3 Player
316 		 * PR: kern/64563
317 		 */
318 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "SEAGRAND", "NP-900*", "*"},
319 		/*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
320 	},
321 	{
322 		/*
323 		 * iRiver iFP MP3 player (with UMS Firmware)
324 		 * PR: kern/54881, i386/63941, kern/66124
325 		 */
326 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "iRiver", "iFP*", "*"},
327 		/*quirks*/ DA_Q_NO_SYNC_CACHE
328  	},
329 	{
330 		/*
331 		 * Frontier Labs NEX IA+ Digital Audio Player, rev 1.10/0.01
332 		 * PR: kern/70158
333 		 */
334 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "FL" , "Nex*", "*"},
335 		/*quirks*/ DA_Q_NO_SYNC_CACHE
336 	},
337 	{
338 		/*
339 		 * ZICPlay USB MP3 Player with FM
340 		 * PR: kern/75057
341 		 */
342 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "ACTIONS*" , "USB DISK*", "*"},
343 		/*quirks*/ DA_Q_NO_SYNC_CACHE
344 	},
345 	{
346 		/*
347 		 * TEAC USB floppy mechanisms
348 		 */
349 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "TEAC" , "FD-05*", "*"},
350 		/*quirks*/ DA_Q_NO_SYNC_CACHE
351 	},
352 	{
353 		/*
354 		 * Kingston DataTraveler II+ USB Pen-Drive.
355 		 * Reported by: Pawel Jakub Dawidek <pjd@FreeBSD.org>
356 		 */
357 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Kingston" , "DataTraveler II+",
358 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
359 	},
360 	{
361 		/*
362 		 * Motorola E398 Mobile Phone (TransFlash memory card).
363 		 * Reported by: Wojciech A. Koszek <dunstan@FreeBSD.czest.pl>
364 		 * PR: usb/89889
365 		 */
366 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Motorola" , "Motorola Phone",
367 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
368 	},
369 	{
370 		/*
371 		 * Qware BeatZkey! Pro
372 		 * PR: usb/79164
373 		 */
374 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "GENERIC", "USB DISK DEVICE",
375 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
376 	},
377 	{
378 		/*
379 		 * Time DPA20B 1GB MP3 Player
380 		 * PR: usb/81846
381 		 */
382 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "USB2.0*", "(FS) FLASH DISK*",
383 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
384 	},
385 	{
386 		/*
387 		 * Samsung USB key 128Mb
388 		 * PR: usb/90081
389 		 */
390 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "USB-DISK", "FreeDik-FlashUsb",
391 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
392 	},
393 	{
394 		/*
395 		 * Kingston DataTraveler 2.0 USB Flash memory.
396 		 * PR: usb/89196
397 		 */
398 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Kingston", "DataTraveler 2.0",
399 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
400 	},
401 	{
402 		/*
403 		 * Creative MUVO Slim mp3 player (USB)
404 		 * PR: usb/86131
405 		 */
406 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "MuVo Slim",
407 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
408 		},
409 	{
410 		/*
411 		 * United MP5512 Portable MP3 Player (2-in-1 USB DISK/MP3)
412 		 * PR: usb/80487
413 		 */
414 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Generic*", "MUSIC DISK",
415 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
416 	},
417 	{
418 		/*
419 		 * SanDisk Micro Cruzer 128MB
420 		 * PR: usb/75970
421 		 */
422 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "SanDisk" , "Micro Cruzer",
423 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
424 	},
425 	{
426 		/*
427 		 * TOSHIBA TransMemory USB sticks
428 		 * PR: kern/94660
429 		 */
430 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "TOSHIBA", "TransMemory",
431 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
432 	},
433 	{
434 		/*
435 		 * PNY USB Flash keys
436 		 * PR: usb/75578, usb/72344, usb/65436
437 		 */
438 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "*" , "USB DISK*",
439 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
440 	},
441 	{
442 		/*
443 		 * Genesys 6-in-1 Card Reader
444 		 * PR: usb/94647
445 		 */
446 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Generic*", "STORAGE DEVICE*",
447 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
448 	},
449 	{
450 		/*
451 		 * Rekam Digital CAMERA
452 		 * PR: usb/98713
453 		 */
454 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "CAMERA*", "4MP-9J6*",
455 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
456 	},
457 	{
458 		/*
459 		 * iRiver H10 MP3 player
460 		 * PR: usb/102547
461 		 */
462 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "iriver", "H10*",
463 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
464 	},
465 	{
466 		/*
467 		 * X-Micro Flash Disk
468 		 * PR: usb/96901
469 		 */
470 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "X-Micro", "Flash Disk",
471 		"*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
472 	},
473 	{
474 		/*
475 		 * EasyMP3 EM732X USB 2.0 Flash MP3 Player
476 		 * PR: usb/96546
477 		 */
478 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "EM732X", "MP3 Player*",
479 		"1.0"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
480 	},
481 };
482 
483 static	disk_strategy_t	dastrategy;
484 static	dumper_t	dadump;
485 static	periph_init_t	dainit;
486 static	void		daasync(void *callback_arg, u_int32_t code,
487 				struct cam_path *path, void *arg);
488 static	void		dasysctlinit(void *context, int pending);
489 static	int		dacmdsizesysctl(SYSCTL_HANDLER_ARGS);
490 static	periph_ctor_t	daregister;
491 static	periph_dtor_t	dacleanup;
492 static	periph_start_t	dastart;
493 static	periph_oninv_t	daoninvalidate;
494 static	void		dadone(struct cam_periph *periph,
495 			       union ccb *done_ccb);
496 static  int		daerror(union ccb *ccb, u_int32_t cam_flags,
497 				u_int32_t sense_flags);
498 static void		daprevent(struct cam_periph *periph, int action);
499 static int		dagetcapacity(struct cam_periph *periph);
500 static void		dasetgeom(struct cam_periph *periph, uint32_t block_len,
501 				  uint64_t maxsector);
502 static timeout_t	dasendorderedtag;
503 static void		dashutdown(void *arg, int howto);
504 
505 #ifndef DA_DEFAULT_TIMEOUT
506 #define DA_DEFAULT_TIMEOUT 60	/* Timeout in seconds */
507 #endif
508 
509 #ifndef	DA_DEFAULT_RETRY
510 #define	DA_DEFAULT_RETRY	4
511 #endif
512 
513 #ifndef	DA_DEFAULT_SEND_ORDERED
514 #define	DA_DEFAULT_SEND_ORDERED	1
515 #endif
516 
517 
518 static int da_retry_count = DA_DEFAULT_RETRY;
519 static int da_default_timeout = DA_DEFAULT_TIMEOUT;
520 static int da_send_ordered = DA_DEFAULT_SEND_ORDERED;
521 
522 SYSCTL_NODE(_kern_cam, OID_AUTO, da, CTLFLAG_RD, 0,
523             "CAM Direct Access Disk driver");
524 SYSCTL_INT(_kern_cam_da, OID_AUTO, retry_count, CTLFLAG_RW,
525            &da_retry_count, 0, "Normal I/O retry count");
526 TUNABLE_INT("kern.cam.da.retry_count", &da_retry_count);
527 SYSCTL_INT(_kern_cam_da, OID_AUTO, default_timeout, CTLFLAG_RW,
528            &da_default_timeout, 0, "Normal I/O timeout (in seconds)");
529 TUNABLE_INT("kern.cam.da.default_timeout", &da_default_timeout);
530 SYSCTL_INT(_kern_cam_da, OID_AUTO, da_send_ordered, CTLFLAG_RW,
531            &da_send_ordered, 0, "Send Ordered Tags");
532 TUNABLE_INT("kern.cam.da.da_send_ordered", &da_send_ordered);
533 
534 /*
535  * DA_ORDEREDTAG_INTERVAL determines how often, relative
536  * to the default timeout, we check to see whether an ordered
537  * tagged transaction is appropriate to prevent simple tag
538  * starvation.  Since we'd like to ensure that there is at least
539  * 1/2 of the timeout length left for a starved transaction to
540  * complete after we've sent an ordered tag, we must poll at least
541  * four times in every timeout period.  This takes care of the worst
542  * case where a starved transaction starts during an interval that
543  * meets the requirement "don't send an ordered tag" test so it takes
544  * us two intervals to determine that a tag must be sent.
545  */
546 #ifndef DA_ORDEREDTAG_INTERVAL
547 #define DA_ORDEREDTAG_INTERVAL 4
548 #endif
549 
550 static struct periph_driver dadriver =
551 {
552 	dainit, "da",
553 	TAILQ_HEAD_INITIALIZER(dadriver.units), /* generation */ 0
554 };
555 
556 PERIPHDRIVER_DECLARE(da, dadriver);
557 
558 static int
559 daopen(struct disk *dp)
560 {
561 	struct cam_periph *periph;
562 	struct da_softc *softc;
563 	int unit;
564 	int error;
565 
566 	periph = (struct cam_periph *)dp->d_drv1;
567 	if (periph == NULL) {
568 		return (ENXIO);
569 	}
570 
571 	if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
572 		return(ENXIO);
573 	}
574 
575 	cam_periph_lock(periph);
576 	if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) {
577 		cam_periph_unlock(periph);
578 		cam_periph_release(periph);
579 		return (error);
580 	}
581 
582 	unit = periph->unit_number;
583 	softc = (struct da_softc *)periph->softc;
584 	softc->flags |= DA_FLAG_OPEN;
585 
586 	CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
587 	    ("daopen: disk=%s%d (unit %d)\n", dp->d_name, dp->d_unit,
588 	     unit));
589 
590 	if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
591 		/* Invalidate our pack information. */
592 		softc->flags &= ~DA_FLAG_PACK_INVALID;
593 	}
594 
595 	error = dagetcapacity(periph);
596 
597 	if (error == 0) {
598 
599 		softc->disk->d_sectorsize = softc->params.secsize;
600 		softc->disk->d_mediasize = softc->params.secsize * (off_t)softc->params.sectors;
601 		/* XXX: these are not actually "firmware" values, so they may be wrong */
602 		softc->disk->d_fwsectors = softc->params.secs_per_track;
603 		softc->disk->d_fwheads = softc->params.heads;
604 		softc->disk->d_devstat->block_size = softc->params.secsize;
605 		softc->disk->d_devstat->flags &= ~DEVSTAT_BS_UNAVAILABLE;
606 	}
607 
608 	if (error == 0) {
609 		if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0 &&
610 		    (softc->quirks & DA_Q_NO_PREVENT) == 0)
611 			daprevent(periph, PR_PREVENT);
612 	} else {
613 		softc->flags &= ~DA_FLAG_OPEN;
614 		cam_periph_release(periph);
615 	}
616 	cam_periph_unhold(periph);
617 	cam_periph_unlock(periph);
618 	return (error);
619 }
620 
621 static int
622 daclose(struct disk *dp)
623 {
624 	struct	cam_periph *periph;
625 	struct	da_softc *softc;
626 	int error;
627 
628 	periph = (struct cam_periph *)dp->d_drv1;
629 	if (periph == NULL)
630 		return (ENXIO);
631 
632 	cam_periph_lock(periph);
633 	if ((error = cam_periph_hold(periph, PRIBIO)) != 0) {
634 		cam_periph_unlock(periph);
635 		cam_periph_release(periph);
636 		return (error);
637 	}
638 
639 	softc = (struct da_softc *)periph->softc;
640 
641 	if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
642 		union	ccb *ccb;
643 
644 		ccb = cam_periph_getccb(periph, /*priority*/1);
645 
646 		scsi_synchronize_cache(&ccb->csio,
647 				       /*retries*/1,
648 				       /*cbfcnp*/dadone,
649 				       MSG_SIMPLE_Q_TAG,
650 				       /*begin_lba*/0,/* Cover the whole disk */
651 				       /*lb_count*/0,
652 				       SSD_FULL_SIZE,
653 				       5 * 60 * 1000);
654 
655 		cam_periph_runccb(ccb, /*error_routine*/NULL, /*cam_flags*/0,
656 				  /*sense_flags*/SF_RETRY_UA,
657 				  softc->disk->d_devstat);
658 
659 		if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
660 			if ((ccb->ccb_h.status & CAM_STATUS_MASK) ==
661 			     CAM_SCSI_STATUS_ERROR) {
662 				int asc, ascq;
663 				int sense_key, error_code;
664 
665 				scsi_extract_sense(&ccb->csio.sense_data,
666 						   &error_code,
667 						   &sense_key,
668 						   &asc, &ascq);
669 				if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
670 					scsi_sense_print(&ccb->csio);
671 			} else {
672 				xpt_print(periph->path, "Synchronize cache "
673 				    "failed, status == 0x%x, scsi status == "
674 				    "0x%x\n", ccb->csio.ccb_h.status,
675 				    ccb->csio.scsi_status);
676 			}
677 		}
678 
679 		if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
680 			cam_release_devq(ccb->ccb_h.path,
681 					 /*relsim_flags*/0,
682 					 /*reduction*/0,
683 					 /*timeout*/0,
684 					 /*getcount_only*/0);
685 
686 		xpt_release_ccb(ccb);
687 
688 	}
689 
690 	if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0) {
691 		if ((softc->quirks & DA_Q_NO_PREVENT) == 0)
692 			daprevent(periph, PR_ALLOW);
693 		/*
694 		 * If we've got removeable media, mark the blocksize as
695 		 * unavailable, since it could change when new media is
696 		 * inserted.
697 		 */
698 		softc->disk->d_devstat->flags |= DEVSTAT_BS_UNAVAILABLE;
699 	}
700 
701 	softc->flags &= ~DA_FLAG_OPEN;
702 	cam_periph_unhold(periph);
703 	cam_periph_unlock(periph);
704 	cam_periph_release(periph);
705 	return (0);
706 }
707 
708 /*
709  * Actually translate the requested transfer into one the physical driver
710  * can understand.  The transfer is described by a buf and will include
711  * only one physical transfer.
712  */
713 static void
714 dastrategy(struct bio *bp)
715 {
716 	struct cam_periph *periph;
717 	struct da_softc *softc;
718 
719 	periph = (struct cam_periph *)bp->bio_disk->d_drv1;
720 	if (periph == NULL) {
721 		biofinish(bp, NULL, ENXIO);
722 		return;
723 	}
724 	softc = (struct da_softc *)periph->softc;
725 
726 	cam_periph_lock(periph);
727 
728 #if 0
729 	/*
730 	 * check it's not too big a transfer for our adapter
731 	 */
732 	scsi_minphys(bp,&sd_switch);
733 #endif
734 
735 	/*
736 	 * Mask interrupts so that the pack cannot be invalidated until
737 	 * after we are in the queue.  Otherwise, we might not properly
738 	 * clean up one of the buffers.
739 	 */
740 
741 	/*
742 	 * If the device has been made invalid, error out
743 	 */
744 	if ((softc->flags & DA_FLAG_PACK_INVALID)) {
745 		cam_periph_unlock(periph);
746 		biofinish(bp, NULL, ENXIO);
747 		return;
748 	}
749 
750 	/*
751 	 * Place it in the queue of disk activities for this disk
752 	 */
753 	bioq_disksort(&softc->bio_queue, bp);
754 
755 	/*
756 	 * Schedule ourselves for performing the work.
757 	 */
758 	xpt_schedule(periph, /* XXX priority */1);
759 	cam_periph_unlock(periph);
760 
761 	return;
762 }
763 
764 static int
765 dadump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
766 {
767 	struct	    cam_periph *periph;
768 	struct	    da_softc *softc;
769 	u_int	    secsize;
770 	struct	    ccb_scsiio csio;
771 	struct	    disk *dp;
772 
773 	dp = arg;
774 	periph = dp->d_drv1;
775 	if (periph == NULL)
776 		return (ENXIO);
777 	softc = (struct da_softc *)periph->softc;
778 	cam_periph_lock(periph);
779 	secsize = softc->params.secsize;
780 
781 	if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
782 		cam_periph_unlock(periph);
783 		return (ENXIO);
784 	}
785 
786 	if (length > 0) {
787 		periph->flags |= CAM_PERIPH_POLLED;
788 		xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
789 		csio.ccb_h.ccb_state = DA_CCB_DUMP;
790 		scsi_read_write(&csio,
791 				/*retries*/1,
792 				dadone,
793 				MSG_ORDERED_Q_TAG,
794 				/*read*/FALSE,
795 				/*byte2*/0,
796 				/*minimum_cmd_size*/ softc->minimum_cmd_size,
797 				offset / secsize,
798 				length / secsize,
799 				/*data_ptr*/(u_int8_t *) virtual,
800 				/*dxfer_len*/length,
801 				/*sense_len*/SSD_FULL_SIZE,
802 				DA_DEFAULT_TIMEOUT * 1000);
803 		xpt_polled_action((union ccb *)&csio);
804 
805 		if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
806 			printf("Aborting dump due to I/O error.\n");
807 			if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
808 			     CAM_SCSI_STATUS_ERROR)
809 				scsi_sense_print(&csio);
810 			else
811 				printf("status == 0x%x, scsi status == 0x%x\n",
812 				       csio.ccb_h.status, csio.scsi_status);
813 			periph->flags |= CAM_PERIPH_POLLED;
814 			return(EIO);
815 		}
816 		cam_periph_unlock(periph);
817 		return(0);
818 	}
819 
820 	/*
821 	 * Sync the disk cache contents to the physical media.
822 	 */
823 	if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
824 
825 		xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
826 		csio.ccb_h.ccb_state = DA_CCB_DUMP;
827 		scsi_synchronize_cache(&csio,
828 				       /*retries*/1,
829 				       /*cbfcnp*/dadone,
830 				       MSG_SIMPLE_Q_TAG,
831 				       /*begin_lba*/0,/* Cover the whole disk */
832 				       /*lb_count*/0,
833 				       SSD_FULL_SIZE,
834 				       5 * 60 * 1000);
835 		xpt_polled_action((union ccb *)&csio);
836 
837 		if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
838 			if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
839 			     CAM_SCSI_STATUS_ERROR) {
840 				int asc, ascq;
841 				int sense_key, error_code;
842 
843 				scsi_extract_sense(&csio.sense_data,
844 						   &error_code,
845 						   &sense_key,
846 						   &asc, &ascq);
847 				if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
848 					scsi_sense_print(&csio);
849 			} else {
850 				xpt_print(periph->path, "Synchronize cache "
851 				    "failed, status == 0x%x, scsi status == "
852 				    "0x%x\n", csio.ccb_h.status,
853 				    csio.scsi_status);
854 			}
855 		}
856 	}
857 	periph->flags &= ~CAM_PERIPH_POLLED;
858 	cam_periph_unlock(periph);
859 	return (0);
860 }
861 
862 static void
863 dainit(void)
864 {
865 	cam_status status;
866 	struct cam_path *path;
867 
868 	/*
869 	 * Install a global async callback.  This callback will
870 	 * receive async callbacks like "new device found".
871 	 */
872 	status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
873 				 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
874 
875 	if (status == CAM_REQ_CMP) {
876 		struct ccb_setasync csa;
877 
878                 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
879                 csa.ccb_h.func_code = XPT_SASYNC_CB;
880                 csa.event_enable = AC_FOUND_DEVICE;
881                 csa.callback = daasync;
882                 csa.callback_arg = NULL;
883                 xpt_action((union ccb *)&csa);
884 		status = csa.ccb_h.status;
885                 xpt_free_path(path);
886         }
887 
888 	if (status != CAM_REQ_CMP) {
889 		printf("da: Failed to attach master async callback "
890 		       "due to status 0x%x!\n", status);
891 	} else if (da_send_ordered) {
892 
893 		/* Register our shutdown event handler */
894 		if ((EVENTHANDLER_REGISTER(shutdown_post_sync, dashutdown,
895 					   NULL, SHUTDOWN_PRI_DEFAULT)) == NULL)
896 		    printf("dainit: shutdown event registration failed!\n");
897 	}
898 }
899 
900 static void
901 daoninvalidate(struct cam_periph *periph)
902 {
903 	struct da_softc *softc;
904 	struct ccb_setasync csa;
905 
906 	softc = (struct da_softc *)periph->softc;
907 
908 	/*
909 	 * De-register any async callbacks.
910 	 */
911 	xpt_setup_ccb(&csa.ccb_h, periph->path,
912 		      /* priority */ 5);
913 	csa.ccb_h.func_code = XPT_SASYNC_CB;
914 	csa.event_enable = 0;
915 	csa.callback = daasync;
916 	csa.callback_arg = periph;
917 	xpt_action((union ccb *)&csa);
918 
919 	softc->flags |= DA_FLAG_PACK_INVALID;
920 
921 	/*
922 	 * Return all queued I/O with ENXIO.
923 	 * XXX Handle any transactions queued to the card
924 	 *     with XPT_ABORT_CCB.
925 	 */
926 	bioq_flush(&softc->bio_queue, NULL, ENXIO);
927 
928 	disk_gone(softc->disk);
929 	xpt_print(periph->path, "lost device\n");
930 }
931 
932 static void
933 dacleanup(struct cam_periph *periph)
934 {
935 	struct da_softc *softc;
936 
937 	softc = (struct da_softc *)periph->softc;
938 
939 	xpt_print(periph->path, "removing device entry\n");
940 	/*
941 	 * If we can't free the sysctl tree, oh well...
942 	 */
943 	if ((softc->flags & DA_FLAG_SCTX_INIT) != 0
944 	    && sysctl_ctx_free(&softc->sysctl_ctx) != 0) {
945 		xpt_print(periph->path, "can't remove sysctl context\n");
946 	}
947 
948 	cam_periph_unlock(periph);
949 	disk_destroy(softc->disk);
950 	callout_drain(&softc->sendordered_c);
951 	cam_periph_lock(periph);
952 	free(softc, M_DEVBUF);
953 }
954 
955 static void
956 daasync(void *callback_arg, u_int32_t code,
957 	struct cam_path *path, void *arg)
958 {
959 	struct cam_periph *periph;
960 
961 	periph = (struct cam_periph *)callback_arg;
962 	switch (code) {
963 	case AC_FOUND_DEVICE:
964 	{
965 		struct ccb_getdev *cgd;
966 		struct cam_sim *sim;
967 		cam_status status;
968 
969 		cgd = (struct ccb_getdev *)arg;
970 		if (cgd == NULL)
971 			break;
972 
973 		if (SID_TYPE(&cgd->inq_data) != T_DIRECT
974 		    && SID_TYPE(&cgd->inq_data) != T_RBC
975 		    && SID_TYPE(&cgd->inq_data) != T_OPTICAL)
976 			break;
977 
978 		/*
979 		 * Allocate a peripheral instance for
980 		 * this device and start the probe
981 		 * process.
982 		 */
983 		sim = xpt_path_sim(cgd->ccb_h.path);
984 		status = cam_periph_alloc(daregister, daoninvalidate,
985 					  dacleanup, dastart,
986 					  "da", CAM_PERIPH_BIO,
987 					  cgd->ccb_h.path, daasync,
988 					  AC_FOUND_DEVICE, cgd);
989 
990 		if (status != CAM_REQ_CMP
991 		 && status != CAM_REQ_INPROG)
992 			printf("daasync: Unable to attach to new device "
993 				"due to status 0x%x\n", status);
994 		break;
995 	}
996 	case AC_SENT_BDR:
997 	case AC_BUS_RESET:
998 	{
999 		struct da_softc *softc;
1000 		struct ccb_hdr *ccbh;
1001 
1002 		softc = (struct da_softc *)periph->softc;
1003 		/*
1004 		 * Don't fail on the expected unit attention
1005 		 * that will occur.
1006 		 */
1007 		softc->flags |= DA_FLAG_RETRY_UA;
1008 		LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le)
1009 			ccbh->ccb_state |= DA_CCB_RETRY_UA;
1010 		/* FALLTHROUGH*/
1011 	}
1012 	default:
1013 		cam_periph_async(periph, code, path, arg);
1014 		break;
1015 	}
1016 }
1017 
1018 static void
1019 dasysctlinit(void *context, int pending)
1020 {
1021 	struct cam_periph *periph;
1022 	struct da_softc *softc;
1023 	char tmpstr[80], tmpstr2[80];
1024 
1025 	periph = (struct cam_periph *)context;
1026 	if (cam_periph_acquire(periph) != CAM_REQ_CMP)
1027 		return;
1028 
1029 	softc = (struct da_softc *)periph->softc;
1030 	snprintf(tmpstr, sizeof(tmpstr), "CAM DA unit %d", periph->unit_number);
1031 	snprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number);
1032 
1033 	mtx_lock(&Giant);
1034 	sysctl_ctx_init(&softc->sysctl_ctx);
1035 	softc->flags |= DA_FLAG_SCTX_INIT;
1036 	softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
1037 		SYSCTL_STATIC_CHILDREN(_kern_cam_da), OID_AUTO, tmpstr2,
1038 		CTLFLAG_RD, 0, tmpstr);
1039 	if (softc->sysctl_tree == NULL) {
1040 		printf("dasysctlinit: unable to allocate sysctl tree\n");
1041 		mtx_unlock(&Giant);
1042 		cam_periph_release(periph);
1043 		return;
1044 	}
1045 
1046 	/*
1047 	 * Now register the sysctl handler, so the user can the value on
1048 	 * the fly.
1049 	 */
1050 	SYSCTL_ADD_PROC(&softc->sysctl_ctx,SYSCTL_CHILDREN(softc->sysctl_tree),
1051 		OID_AUTO, "minimum_cmd_size", CTLTYPE_INT | CTLFLAG_RW,
1052 		&softc->minimum_cmd_size, 0, dacmdsizesysctl, "I",
1053 		"Minimum CDB size");
1054 
1055 	mtx_unlock(&Giant);
1056 	cam_periph_release(periph);
1057 }
1058 
1059 static int
1060 dacmdsizesysctl(SYSCTL_HANDLER_ARGS)
1061 {
1062 	int error, value;
1063 
1064 	value = *(int *)arg1;
1065 
1066 	error = sysctl_handle_int(oidp, &value, 0, req);
1067 
1068 	if ((error != 0)
1069 	 || (req->newptr == NULL))
1070 		return (error);
1071 
1072 	/*
1073 	 * Acceptable values here are 6, 10, 12 or 16.
1074 	 */
1075 	if (value < 6)
1076 		value = 6;
1077 	else if ((value > 6)
1078 	      && (value <= 10))
1079 		value = 10;
1080 	else if ((value > 10)
1081 	      && (value <= 12))
1082 		value = 12;
1083 	else if (value > 12)
1084 		value = 16;
1085 
1086 	*(int *)arg1 = value;
1087 
1088 	return (0);
1089 }
1090 
1091 static cam_status
1092 daregister(struct cam_periph *periph, void *arg)
1093 {
1094 	struct da_softc *softc;
1095 	struct ccb_setasync csa;
1096 	struct ccb_pathinq cpi;
1097 	struct ccb_getdev *cgd;
1098 	char tmpstr[80];
1099 	caddr_t match;
1100 
1101 	cgd = (struct ccb_getdev *)arg;
1102 	if (periph == NULL) {
1103 		printf("daregister: periph was NULL!!\n");
1104 		return(CAM_REQ_CMP_ERR);
1105 	}
1106 
1107 	if (cgd == NULL) {
1108 		printf("daregister: no getdev CCB, can't register device\n");
1109 		return(CAM_REQ_CMP_ERR);
1110 	}
1111 
1112 	softc = (struct da_softc *)malloc(sizeof(*softc), M_DEVBUF,
1113 	    M_NOWAIT|M_ZERO);
1114 
1115 	if (softc == NULL) {
1116 		printf("daregister: Unable to probe new device. "
1117 		       "Unable to allocate softc\n");
1118 		return(CAM_REQ_CMP_ERR);
1119 	}
1120 
1121 	LIST_INIT(&softc->pending_ccbs);
1122 	softc->state = DA_STATE_PROBE;
1123 	bioq_init(&softc->bio_queue);
1124 	if (SID_IS_REMOVABLE(&cgd->inq_data))
1125 		softc->flags |= DA_FLAG_PACK_REMOVABLE;
1126 	if ((cgd->inq_data.flags & SID_CmdQue) != 0)
1127 		softc->flags |= DA_FLAG_TAGGED_QUEUING;
1128 
1129 	periph->softc = softc;
1130 
1131 	/*
1132 	 * See if this device has any quirks.
1133 	 */
1134 	match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1135 			       (caddr_t)da_quirk_table,
1136 			       sizeof(da_quirk_table)/sizeof(*da_quirk_table),
1137 			       sizeof(*da_quirk_table), scsi_inquiry_match);
1138 
1139 	if (match != NULL)
1140 		softc->quirks = ((struct da_quirk_entry *)match)->quirks;
1141 	else
1142 		softc->quirks = DA_Q_NONE;
1143 
1144 	/* Check if the SIM does not want 6 byte commands */
1145 	xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
1146 	cpi.ccb_h.func_code = XPT_PATH_INQ;
1147 	xpt_action((union ccb *)&cpi);
1148 	if (cpi.ccb_h.status == CAM_REQ_CMP && (cpi.hba_misc & PIM_NO_6_BYTE))
1149 		softc->quirks |= DA_Q_NO_6_BYTE;
1150 
1151 	TASK_INIT(&softc->sysctl_task, 0, dasysctlinit, periph);
1152 
1153 	/*
1154 	 * RBC devices don't have to support READ(6), only READ(10).
1155 	 */
1156 	if (softc->quirks & DA_Q_NO_6_BYTE || SID_TYPE(&cgd->inq_data) == T_RBC)
1157 		softc->minimum_cmd_size = 10;
1158 	else
1159 		softc->minimum_cmd_size = 6;
1160 
1161 	/*
1162 	 * Load the user's default, if any.
1163 	 */
1164 	snprintf(tmpstr, sizeof(tmpstr), "kern.cam.da.%d.minimum_cmd_size",
1165 		 periph->unit_number);
1166 	TUNABLE_INT_FETCH(tmpstr, &softc->minimum_cmd_size);
1167 
1168 	/*
1169 	 * 6, 10, 12 and 16 are the currently permissible values.
1170 	 */
1171 	if (softc->minimum_cmd_size < 6)
1172 		softc->minimum_cmd_size = 6;
1173 	else if ((softc->minimum_cmd_size > 6)
1174 	      && (softc->minimum_cmd_size <= 10))
1175 		softc->minimum_cmd_size = 10;
1176 	else if ((softc->minimum_cmd_size > 10)
1177 	      && (softc->minimum_cmd_size <= 12))
1178 		softc->minimum_cmd_size = 12;
1179 	else if (softc->minimum_cmd_size > 12)
1180 		softc->minimum_cmd_size = 16;
1181 
1182 	/*
1183 	 * Register this media as a disk
1184 	 */
1185 
1186 	mtx_unlock(periph->sim->mtx);
1187 	softc->disk = disk_alloc();
1188 	softc->disk->d_open = daopen;
1189 	softc->disk->d_close = daclose;
1190 	softc->disk->d_strategy = dastrategy;
1191 	softc->disk->d_dump = dadump;
1192 	softc->disk->d_name = "da";
1193 	softc->disk->d_drv1 = periph;
1194 	softc->disk->d_maxsize = DFLTPHYS; /* XXX: probably not arbitrary */
1195 	softc->disk->d_unit = periph->unit_number;
1196 	softc->disk->d_flags = 0;
1197 	if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0)
1198 		softc->disk->d_flags |= DISKFLAG_CANFLUSHCACHE;
1199 	disk_create(softc->disk, DISK_VERSION);
1200 	mtx_lock(periph->sim->mtx);
1201 
1202 	/*
1203 	 * Add async callbacks for bus reset and
1204 	 * bus device reset calls.  I don't bother
1205 	 * checking if this fails as, in most cases,
1206 	 * the system will function just fine without
1207 	 * them and the only alternative would be to
1208 	 * not attach the device on failure.
1209 	 */
1210 	xpt_setup_ccb(&csa.ccb_h, periph->path, /*priority*/5);
1211 	csa.ccb_h.func_code = XPT_SASYNC_CB;
1212 	csa.event_enable = AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE;
1213 	csa.callback = daasync;
1214 	csa.callback_arg = periph;
1215 	xpt_action((union ccb *)&csa);
1216 
1217 	/*
1218 	 * Take an exclusive refcount on the periph while dastart is called
1219 	 * to finish the probe.  The reference will be dropped in dadone at
1220 	 * the end of probe.
1221 	 */
1222 	(void)cam_periph_hold(periph, PRIBIO);
1223 	xpt_schedule(periph, /*priority*/5);
1224 
1225 	/*
1226 	 * Schedule a periodic event to occasionally send an
1227 	 * ordered tag to a device.
1228 	 */
1229 	callout_init_mtx(&softc->sendordered_c, periph->sim->mtx, 0);
1230 	callout_reset(&softc->sendordered_c,
1231 	    (DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL,
1232 	    dasendorderedtag, softc);
1233 
1234 	return(CAM_REQ_CMP);
1235 }
1236 
1237 static void
1238 dastart(struct cam_periph *periph, union ccb *start_ccb)
1239 {
1240 	struct da_softc *softc;
1241 
1242 	softc = (struct da_softc *)periph->softc;
1243 
1244 	switch (softc->state) {
1245 	case DA_STATE_NORMAL:
1246 	{
1247 		/* Pull a buffer from the queue and get going on it */
1248 		struct bio *bp;
1249 
1250 		/*
1251 		 * See if there is a buf with work for us to do..
1252 		 */
1253 		bp = bioq_first(&softc->bio_queue);
1254 		if (periph->immediate_priority <= periph->pinfo.priority) {
1255 			CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1256 					("queuing for immediate ccb\n"));
1257 			start_ccb->ccb_h.ccb_state = DA_CCB_WAITING;
1258 			SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1259 					  periph_links.sle);
1260 			periph->immediate_priority = CAM_PRIORITY_NONE;
1261 			wakeup(&periph->ccb_list);
1262 		} else if (bp == NULL) {
1263 			xpt_release_ccb(start_ccb);
1264 		} else {
1265 			u_int8_t tag_code;
1266 
1267 			bioq_remove(&softc->bio_queue, bp);
1268 
1269 			if ((softc->flags & DA_FLAG_NEED_OTAG) != 0) {
1270 				softc->flags &= ~DA_FLAG_NEED_OTAG;
1271 				softc->ordered_tag_count++;
1272 				tag_code = MSG_ORDERED_Q_TAG;
1273 			} else {
1274 				tag_code = MSG_SIMPLE_Q_TAG;
1275 			}
1276 			switch (bp->bio_cmd) {
1277 			case BIO_READ:
1278 			case BIO_WRITE:
1279 				scsi_read_write(&start_ccb->csio,
1280 						/*retries*/da_retry_count,
1281 						/*cbfcnp*/dadone,
1282 						/*tag_action*/tag_code,
1283 						/*read_op*/bp->bio_cmd == BIO_READ,
1284 						/*byte2*/0,
1285 						softc->minimum_cmd_size,
1286 						/*lba*/bp->bio_pblkno,
1287 						/*block_count*/bp->bio_bcount /
1288 						softc->params.secsize,
1289 						/*data_ptr*/ bp->bio_data,
1290 						/*dxfer_len*/ bp->bio_bcount,
1291 						/*sense_len*/SSD_FULL_SIZE,
1292 						/*timeout*/da_default_timeout*1000);
1293 				break;
1294 			case BIO_FLUSH:
1295 				scsi_synchronize_cache(&start_ccb->csio,
1296 						       /*retries*/1,
1297 						       /*cbfcnp*/dadone,
1298 						       MSG_SIMPLE_Q_TAG,
1299 						       /*begin_lba*/0,/* Cover the whole disk */
1300 						       /*lb_count*/0,
1301 						       SSD_FULL_SIZE,
1302 						       /*timeout*/da_default_timeout*1000);
1303 				break;
1304 			}
1305 			start_ccb->ccb_h.ccb_state = DA_CCB_BUFFER_IO;
1306 
1307 			/*
1308 			 * Block out any asyncronous callbacks
1309 			 * while we touch the pending ccb list.
1310 			 */
1311 			LIST_INSERT_HEAD(&softc->pending_ccbs,
1312 					 &start_ccb->ccb_h, periph_links.le);
1313 			softc->outstanding_cmds++;
1314 
1315 			/* We expect a unit attention from this device */
1316 			if ((softc->flags & DA_FLAG_RETRY_UA) != 0) {
1317 				start_ccb->ccb_h.ccb_state |= DA_CCB_RETRY_UA;
1318 				softc->flags &= ~DA_FLAG_RETRY_UA;
1319 			}
1320 
1321 			start_ccb->ccb_h.ccb_bp = bp;
1322 			bp = bioq_first(&softc->bio_queue);
1323 
1324 			xpt_action(start_ccb);
1325 		}
1326 
1327 		if (bp != NULL) {
1328 			/* Have more work to do, so ensure we stay scheduled */
1329 			xpt_schedule(periph, /* XXX priority */1);
1330 		}
1331 		break;
1332 	}
1333 	case DA_STATE_PROBE:
1334 	{
1335 		struct ccb_scsiio *csio;
1336 		struct scsi_read_capacity_data *rcap;
1337 
1338 		rcap = (struct scsi_read_capacity_data *)malloc(sizeof(*rcap),
1339 								M_TEMP,
1340 								M_NOWAIT);
1341 		if (rcap == NULL) {
1342 			printf("dastart: Couldn't malloc read_capacity data\n");
1343 			/* da_free_periph??? */
1344 			break;
1345 		}
1346 		csio = &start_ccb->csio;
1347 		scsi_read_capacity(csio,
1348 				   /*retries*/4,
1349 				   dadone,
1350 				   MSG_SIMPLE_Q_TAG,
1351 				   rcap,
1352 				   SSD_FULL_SIZE,
1353 				   /*timeout*/5000);
1354 		start_ccb->ccb_h.ccb_bp = NULL;
1355 		start_ccb->ccb_h.ccb_state = DA_CCB_PROBE;
1356 		xpt_action(start_ccb);
1357 		break;
1358 	}
1359 	case DA_STATE_PROBE2:
1360 	{
1361 		struct ccb_scsiio *csio;
1362 		struct scsi_read_capacity_data_long *rcaplong;
1363 
1364 		rcaplong = (struct scsi_read_capacity_data_long *)
1365 			malloc(sizeof(*rcaplong), M_TEMP, M_NOWAIT);
1366 		if (rcaplong == NULL) {
1367 			printf("dastart: Couldn't malloc read_capacity data\n");
1368 			/* da_free_periph??? */
1369 			break;
1370 		}
1371 		csio = &start_ccb->csio;
1372 		scsi_read_capacity_16(csio,
1373 				      /*retries*/ 4,
1374 				      /*cbfcnp*/ dadone,
1375 				      /*tag_action*/ MSG_SIMPLE_Q_TAG,
1376 				      /*lba*/ 0,
1377 				      /*reladr*/ 0,
1378 				      /*pmi*/ 0,
1379 				      rcaplong,
1380 				      /*sense_len*/ SSD_FULL_SIZE,
1381 				      /*timeout*/ 60000);
1382 		start_ccb->ccb_h.ccb_bp = NULL;
1383 		start_ccb->ccb_h.ccb_state = DA_CCB_PROBE2;
1384 		xpt_action(start_ccb);
1385 		break;
1386 	}
1387 	}
1388 }
1389 
1390 static int
1391 cmd6workaround(union ccb *ccb)
1392 {
1393 	struct scsi_rw_6 cmd6;
1394 	struct scsi_rw_10 *cmd10;
1395 	struct da_softc *softc;
1396 	u_int8_t *cdb;
1397 	int frozen;
1398 
1399 	cdb = ccb->csio.cdb_io.cdb_bytes;
1400 
1401 	/* Translation only possible if CDB is an array and cmd is R/W6 */
1402 	if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0 ||
1403 	    (*cdb != READ_6 && *cdb != WRITE_6))
1404 		return 0;
1405 
1406 	xpt_print(ccb->ccb_h.path, "READ(6)/WRITE(6) not supported, "
1407 	    "increasing minimum_cmd_size to 10.\n");
1408  	softc = (struct da_softc *)xpt_path_periph(ccb->ccb_h.path)->softc;
1409 	softc->minimum_cmd_size = 10;
1410 
1411 	bcopy(cdb, &cmd6, sizeof(struct scsi_rw_6));
1412 	cmd10 = (struct scsi_rw_10 *)cdb;
1413 	cmd10->opcode = (cmd6.opcode == READ_6) ? READ_10 : WRITE_10;
1414 	cmd10->byte2 = 0;
1415 	scsi_ulto4b(scsi_3btoul(cmd6.addr), cmd10->addr);
1416 	cmd10->reserved = 0;
1417 	scsi_ulto2b(cmd6.length, cmd10->length);
1418 	cmd10->control = cmd6.control;
1419 	ccb->csio.cdb_len = sizeof(*cmd10);
1420 
1421 	/* Requeue request, unfreezing queue if necessary */
1422 	frozen = (ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
1423  	ccb->ccb_h.status = CAM_REQUEUE_REQ;
1424 	xpt_action(ccb);
1425 	if (frozen) {
1426 		cam_release_devq(ccb->ccb_h.path,
1427 				 /*relsim_flags*/0,
1428 				 /*reduction*/0,
1429 				 /*timeout*/0,
1430 				 /*getcount_only*/0);
1431 	}
1432 	return (ERESTART);
1433 }
1434 
1435 static void
1436 dadone(struct cam_periph *periph, union ccb *done_ccb)
1437 {
1438 	struct da_softc *softc;
1439 	struct ccb_scsiio *csio;
1440 
1441 	softc = (struct da_softc *)periph->softc;
1442 	csio = &done_ccb->csio;
1443 	switch (csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) {
1444 	case DA_CCB_BUFFER_IO:
1445 	{
1446 		struct bio *bp;
1447 
1448 		bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
1449 		if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1450 			int error;
1451 			int sf;
1452 
1453 			if ((csio->ccb_h.ccb_state & DA_CCB_RETRY_UA) != 0)
1454 				sf = SF_RETRY_UA;
1455 			else
1456 				sf = 0;
1457 
1458 			error = daerror(done_ccb, CAM_RETRY_SELTO, sf);
1459 			if (error == ERESTART) {
1460 				/*
1461 				 * A retry was scheuled, so
1462 				 * just return.
1463 				 */
1464 				return;
1465 			}
1466 			if (error != 0) {
1467 
1468 				if (error == ENXIO) {
1469 					/*
1470 					 * Catastrophic error.  Mark our pack as
1471 					 * invalid.
1472 					 */
1473 					/*
1474 					 * XXX See if this is really a media
1475 					 * XXX change first?
1476 					 */
1477 					xpt_print(periph->path,
1478 					    "Invalidating pack\n");
1479 					softc->flags |= DA_FLAG_PACK_INVALID;
1480 				}
1481 
1482 				/*
1483 				 * return all queued I/O with EIO, so that
1484 				 * the client can retry these I/Os in the
1485 				 * proper order should it attempt to recover.
1486 				 */
1487 				bioq_flush(&softc->bio_queue, NULL, EIO);
1488 				bp->bio_error = error;
1489 				bp->bio_resid = bp->bio_bcount;
1490 				bp->bio_flags |= BIO_ERROR;
1491 			} else {
1492 				bp->bio_resid = csio->resid;
1493 				bp->bio_error = 0;
1494 				if (bp->bio_resid != 0)
1495 					bp->bio_flags |= BIO_ERROR;
1496 			}
1497 			if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1498 				cam_release_devq(done_ccb->ccb_h.path,
1499 						 /*relsim_flags*/0,
1500 						 /*reduction*/0,
1501 						 /*timeout*/0,
1502 						 /*getcount_only*/0);
1503 		} else {
1504 			if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1505 				panic("REQ_CMP with QFRZN");
1506 			bp->bio_resid = csio->resid;
1507 			if (csio->resid > 0)
1508 				bp->bio_flags |= BIO_ERROR;
1509 		}
1510 
1511 		/*
1512 		 * Block out any asyncronous callbacks
1513 		 * while we touch the pending ccb list.
1514 		 */
1515 		LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
1516 		softc->outstanding_cmds--;
1517 		if (softc->outstanding_cmds == 0)
1518 			softc->flags |= DA_FLAG_WENT_IDLE;
1519 
1520 		biodone(bp);
1521 		break;
1522 	}
1523 	case DA_CCB_PROBE:
1524 	case DA_CCB_PROBE2:
1525 	{
1526 		struct	   scsi_read_capacity_data *rdcap;
1527 		struct     scsi_read_capacity_data_long *rcaplong;
1528 		char	   announce_buf[80];
1529 
1530 		rdcap = NULL;
1531 		rcaplong = NULL;
1532 		if (softc->state == DA_STATE_PROBE)
1533 			rdcap =(struct scsi_read_capacity_data *)csio->data_ptr;
1534 		else
1535 			rcaplong = (struct scsi_read_capacity_data_long *)
1536 				csio->data_ptr;
1537 
1538 		if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
1539 			struct disk_params *dp;
1540 			uint32_t block_size;
1541 			uint64_t maxsector;
1542 
1543 			if (softc->state == DA_STATE_PROBE) {
1544 				block_size = scsi_4btoul(rdcap->length);
1545 				maxsector = scsi_4btoul(rdcap->addr);
1546 
1547 				/*
1548 				 * According to SBC-2, if the standard 10
1549 				 * byte READ CAPACITY command returns 2^32,
1550 				 * we should issue the 16 byte version of
1551 				 * the command, since the device in question
1552 				 * has more sectors than can be represented
1553 				 * with the short version of the command.
1554 				 */
1555 				if (maxsector == 0xffffffff) {
1556 					softc->state = DA_STATE_PROBE2;
1557 					free(rdcap, M_TEMP);
1558 					xpt_release_ccb(done_ccb);
1559 					xpt_schedule(periph, /*priority*/5);
1560 					return;
1561 				}
1562 			} else {
1563 				block_size = scsi_4btoul(rcaplong->length);
1564 				maxsector = scsi_8btou64(rcaplong->addr);
1565 			}
1566 
1567 			/*
1568 			 * Because GEOM code just will panic us if we
1569 			 * give them an 'illegal' value we'll avoid that
1570 			 * here.
1571 			 */
1572 			if (block_size >= MAXPHYS || block_size == 0) {
1573 				xpt_print(periph->path,
1574 				    "unsupportable block size %ju\n",
1575 				    (uintmax_t) block_size);
1576 				announce_buf[0] = '\0';
1577 				cam_periph_invalidate(periph);
1578 			} else {
1579 				dasetgeom(periph, block_size, maxsector);
1580 				dp = &softc->params;
1581 				snprintf(announce_buf, sizeof(announce_buf),
1582 				        "%juMB (%ju %u byte sectors: %dH %dS/T "
1583                                         "%dC)", (uintmax_t)
1584 	                                (((uintmax_t)dp->secsize *
1585 				        dp->sectors) / (1024*1024)),
1586 			                (uintmax_t)dp->sectors,
1587 				        dp->secsize, dp->heads,
1588                                         dp->secs_per_track, dp->cylinders);
1589 			}
1590 		} else {
1591 			int	error;
1592 
1593 			announce_buf[0] = '\0';
1594 
1595 			/*
1596 			 * Retry any UNIT ATTENTION type errors.  They
1597 			 * are expected at boot.
1598 			 */
1599 			error = daerror(done_ccb, CAM_RETRY_SELTO,
1600 					SF_RETRY_UA|SF_NO_PRINT);
1601 			if (error == ERESTART) {
1602 				/*
1603 				 * A retry was scheuled, so
1604 				 * just return.
1605 				 */
1606 				return;
1607 			} else if (error != 0) {
1608 				struct scsi_sense_data *sense;
1609 				int asc, ascq;
1610 				int sense_key, error_code;
1611 				int have_sense;
1612 				cam_status status;
1613 				struct ccb_getdev cgd;
1614 
1615 				/* Don't wedge this device's queue */
1616 				status = done_ccb->ccb_h.status;
1617 				if ((status & CAM_DEV_QFRZN) != 0)
1618 					cam_release_devq(done_ccb->ccb_h.path,
1619 							 /*relsim_flags*/0,
1620 							 /*reduction*/0,
1621 							 /*timeout*/0,
1622 							 /*getcount_only*/0);
1623 
1624 
1625 				xpt_setup_ccb(&cgd.ccb_h,
1626 					      done_ccb->ccb_h.path,
1627 					      /* priority */ 1);
1628 				cgd.ccb_h.func_code = XPT_GDEV_TYPE;
1629 				xpt_action((union ccb *)&cgd);
1630 
1631 				if (((csio->ccb_h.flags & CAM_SENSE_PHYS) != 0)
1632 				 || ((csio->ccb_h.flags & CAM_SENSE_PTR) != 0)
1633 				 || ((status & CAM_AUTOSNS_VALID) == 0))
1634 					have_sense = FALSE;
1635 				else
1636 					have_sense = TRUE;
1637 
1638 				if (have_sense) {
1639 					sense = &csio->sense_data;
1640 					scsi_extract_sense(sense, &error_code,
1641 							   &sense_key,
1642 							   &asc, &ascq);
1643 				}
1644 				/*
1645 				 * Attach to anything that claims to be a
1646 				 * direct access or optical disk device,
1647 				 * as long as it doesn't return a "Logical
1648 				 * unit not supported" (0x25) error.
1649 				 */
1650 				if ((have_sense) && (asc != 0x25)
1651 				 && (error_code == SSD_CURRENT_ERROR)) {
1652 					const char *sense_key_desc;
1653 					const char *asc_desc;
1654 
1655 					scsi_sense_desc(sense_key, asc, ascq,
1656 							&cgd.inq_data,
1657 							&sense_key_desc,
1658 							&asc_desc);
1659 					snprintf(announce_buf,
1660 					    sizeof(announce_buf),
1661 						"Attempt to query device "
1662 						"size failed: %s, %s",
1663 						sense_key_desc,
1664 						asc_desc);
1665 				} else {
1666 					if (have_sense)
1667 						scsi_sense_print(
1668 							&done_ccb->csio);
1669 					else {
1670 						xpt_print(periph->path,
1671 						    "got CAM status %#x\n",
1672 						    done_ccb->ccb_h.status);
1673 					}
1674 
1675 					xpt_print(periph->path, "fatal error, "
1676 					    "failed to attach to device\n");
1677 
1678 					/*
1679 					 * Free up resources.
1680 					 */
1681 					cam_periph_invalidate(periph);
1682 				}
1683 			}
1684 		}
1685 		free(csio->data_ptr, M_TEMP);
1686 		if (announce_buf[0] != '\0') {
1687 			xpt_announce_periph(periph, announce_buf);
1688 			/*
1689 			 * Create our sysctl variables, now that we know
1690 			 * we have successfully attached.
1691 			 */
1692 			taskqueue_enqueue(taskqueue_thread,&softc->sysctl_task);
1693 		}
1694 		softc->state = DA_STATE_NORMAL;
1695 		/*
1696 		 * Since our peripheral may be invalidated by an error
1697 		 * above or an external event, we must release our CCB
1698 		 * before releasing the probe lock on the peripheral.
1699 		 * The peripheral will only go away once the last lock
1700 		 * is removed, and we need it around for the CCB release
1701 		 * operation.
1702 		 */
1703 		xpt_release_ccb(done_ccb);
1704 		cam_periph_unhold(periph);
1705 		return;
1706 	}
1707 	case DA_CCB_WAITING:
1708 	{
1709 		/* Caller will release the CCB */
1710 		wakeup(&done_ccb->ccb_h.cbfcnp);
1711 		return;
1712 	}
1713 	case DA_CCB_DUMP:
1714 		/* No-op.  We're polling */
1715 		return;
1716 	default:
1717 		break;
1718 	}
1719 	xpt_release_ccb(done_ccb);
1720 }
1721 
1722 static int
1723 daerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
1724 {
1725 	struct da_softc	  *softc;
1726 	struct cam_periph *periph;
1727 	int error;
1728 
1729 	periph = xpt_path_periph(ccb->ccb_h.path);
1730 	softc = (struct da_softc *)periph->softc;
1731 
1732  	/*
1733 	 * Automatically detect devices that do not support
1734  	 * READ(6)/WRITE(6) and upgrade to using 10 byte cdbs.
1735  	 */
1736 	error = 0;
1737 	if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INVALID) {
1738 		error = cmd6workaround(ccb);
1739 	} else if (((ccb->ccb_h.status & CAM_STATUS_MASK) ==
1740 		   CAM_SCSI_STATUS_ERROR)
1741 	 && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)
1742 	 && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
1743 	 && ((ccb->ccb_h.flags & CAM_SENSE_PHYS) == 0)
1744 	 && ((ccb->ccb_h.flags & CAM_SENSE_PTR) == 0)) {
1745 		int sense_key, error_code, asc, ascq;
1746 
1747  		scsi_extract_sense(&ccb->csio.sense_data,
1748 				   &error_code, &sense_key, &asc, &ascq);
1749 		if (sense_key == SSD_KEY_ILLEGAL_REQUEST)
1750  			error = cmd6workaround(ccb);
1751 	}
1752 	if (error == ERESTART)
1753 		return (ERESTART);
1754 
1755 	/*
1756 	 * XXX
1757 	 * Until we have a better way of doing pack validation,
1758 	 * don't treat UAs as errors.
1759 	 */
1760 	sense_flags |= SF_RETRY_UA;
1761 	return(cam_periph_error(ccb, cam_flags, sense_flags,
1762 				&softc->saved_ccb));
1763 }
1764 
1765 static void
1766 daprevent(struct cam_periph *periph, int action)
1767 {
1768 	struct	da_softc *softc;
1769 	union	ccb *ccb;
1770 	int	error;
1771 
1772 	softc = (struct da_softc *)periph->softc;
1773 
1774 	if (((action == PR_ALLOW)
1775 	  && (softc->flags & DA_FLAG_PACK_LOCKED) == 0)
1776 	 || ((action == PR_PREVENT)
1777 	  && (softc->flags & DA_FLAG_PACK_LOCKED) != 0)) {
1778 		return;
1779 	}
1780 
1781 	ccb = cam_periph_getccb(periph, /*priority*/1);
1782 
1783 	scsi_prevent(&ccb->csio,
1784 		     /*retries*/1,
1785 		     /*cbcfp*/dadone,
1786 		     MSG_SIMPLE_Q_TAG,
1787 		     action,
1788 		     SSD_FULL_SIZE,
1789 		     5000);
1790 
1791 	error = cam_periph_runccb(ccb, /*error_routine*/NULL, CAM_RETRY_SELTO,
1792 				  SF_RETRY_UA, softc->disk->d_devstat);
1793 
1794 	if (error == 0) {
1795 		if (action == PR_ALLOW)
1796 			softc->flags &= ~DA_FLAG_PACK_LOCKED;
1797 		else
1798 			softc->flags |= DA_FLAG_PACK_LOCKED;
1799 	}
1800 
1801 	xpt_release_ccb(ccb);
1802 }
1803 
1804 static int
1805 dagetcapacity(struct cam_periph *periph)
1806 {
1807 	struct da_softc *softc;
1808 	union ccb *ccb;
1809 	struct scsi_read_capacity_data *rcap;
1810 	struct scsi_read_capacity_data_long *rcaplong;
1811 	uint32_t block_len;
1812 	uint64_t maxsector;
1813 	int error;
1814 	u_int32_t sense_flags;
1815 
1816 	softc = (struct da_softc *)periph->softc;
1817 	block_len = 0;
1818 	maxsector = 0;
1819 	error = 0;
1820 	sense_flags = SF_RETRY_UA;
1821 	if (softc->flags & DA_FLAG_PACK_REMOVABLE)
1822 		sense_flags |= SF_NO_PRINT;
1823 
1824 	/* Do a read capacity */
1825 	rcap = (struct scsi_read_capacity_data *)malloc(sizeof(*rcaplong),
1826 							M_TEMP,
1827 							M_NOWAIT);
1828 	if (rcap == NULL)
1829 		return (ENOMEM);
1830 
1831 	ccb = cam_periph_getccb(periph, /*priority*/1);
1832 	scsi_read_capacity(&ccb->csio,
1833 			   /*retries*/4,
1834 			   /*cbfncp*/dadone,
1835 			   MSG_SIMPLE_Q_TAG,
1836 			   rcap,
1837 			   SSD_FULL_SIZE,
1838 			   /*timeout*/60000);
1839 	ccb->ccb_h.ccb_bp = NULL;
1840 
1841 	error = cam_periph_runccb(ccb, daerror,
1842 				  /*cam_flags*/CAM_RETRY_SELTO,
1843 				  sense_flags,
1844 				  softc->disk->d_devstat);
1845 
1846 	if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1847 		cam_release_devq(ccb->ccb_h.path,
1848 				 /*relsim_flags*/0,
1849 				 /*reduction*/0,
1850 				 /*timeout*/0,
1851 				 /*getcount_only*/0);
1852 
1853 	if (error == 0) {
1854 		block_len = scsi_4btoul(rcap->length);
1855 		maxsector = scsi_4btoul(rcap->addr);
1856 
1857 		if (maxsector != 0xffffffff)
1858 			goto done;
1859 	} else
1860 		goto done;
1861 
1862 	rcaplong = (struct scsi_read_capacity_data_long *)rcap;
1863 
1864 	scsi_read_capacity_16(&ccb->csio,
1865 			      /*retries*/ 4,
1866 			      /*cbfcnp*/ dadone,
1867 			      /*tag_action*/ MSG_SIMPLE_Q_TAG,
1868 			      /*lba*/ 0,
1869 			      /*reladr*/ 0,
1870 			      /*pmi*/ 0,
1871 			      rcaplong,
1872 			      /*sense_len*/ 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(rcaplong->length);
1890 		maxsector = scsi_8btou64(rcaplong->addr);
1891 	}
1892 
1893 done:
1894 
1895 	if (error == 0)
1896 		dasetgeom(periph, block_len, maxsector);
1897 
1898 	xpt_release_ccb(ccb);
1899 
1900 	free(rcap, M_TEMP);
1901 
1902 	return (error);
1903 }
1904 
1905 static void
1906 dasetgeom(struct cam_periph *periph, uint32_t block_len, uint64_t maxsector)
1907 {
1908 	struct ccb_calc_geometry ccg;
1909 	struct da_softc *softc;
1910 	struct disk_params *dp;
1911 
1912 	softc = (struct da_softc *)periph->softc;
1913 
1914 	dp = &softc->params;
1915 	dp->secsize = block_len;
1916 	dp->sectors = maxsector + 1;
1917 	/*
1918 	 * Have the controller provide us with a geometry
1919 	 * for this disk.  The only time the geometry
1920 	 * matters is when we boot and the controller
1921 	 * is the only one knowledgeable enough to come
1922 	 * up with something that will make this a bootable
1923 	 * device.
1924 	 */
1925 	xpt_setup_ccb(&ccg.ccb_h, periph->path, /*priority*/1);
1926 	ccg.ccb_h.func_code = XPT_CALC_GEOMETRY;
1927 	ccg.block_size = dp->secsize;
1928 	ccg.volume_size = dp->sectors;
1929 	ccg.heads = 0;
1930 	ccg.secs_per_track = 0;
1931 	ccg.cylinders = 0;
1932 	xpt_action((union ccb*)&ccg);
1933 	if ((ccg.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1934 		/*
1935 		 * We don't know what went wrong here- but just pick
1936 		 * a geometry so we don't have nasty things like divide
1937 		 * by zero.
1938 		 */
1939 		dp->heads = 255;
1940 		dp->secs_per_track = 255;
1941 		dp->cylinders = dp->sectors / (255 * 255);
1942 		if (dp->cylinders == 0) {
1943 			dp->cylinders = 1;
1944 		}
1945 	} else {
1946 		dp->heads = ccg.heads;
1947 		dp->secs_per_track = ccg.secs_per_track;
1948 		dp->cylinders = ccg.cylinders;
1949 	}
1950 }
1951 
1952 static void
1953 dasendorderedtag(void *arg)
1954 {
1955 	struct da_softc *softc = arg;
1956 
1957 	if (da_send_ordered) {
1958 		if ((softc->ordered_tag_count == 0)
1959 		 && ((softc->flags & DA_FLAG_WENT_IDLE) == 0)) {
1960 			softc->flags |= DA_FLAG_NEED_OTAG;
1961 		}
1962 		if (softc->outstanding_cmds > 0)
1963 			softc->flags &= ~DA_FLAG_WENT_IDLE;
1964 
1965 		softc->ordered_tag_count = 0;
1966 	}
1967 	/* Queue us up again */
1968 	callout_reset(&softc->sendordered_c,
1969 	    (DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL,
1970 	    dasendorderedtag, softc);
1971 }
1972 
1973 /*
1974  * Step through all DA peripheral drivers, and if the device is still open,
1975  * sync the disk cache to physical media.
1976  */
1977 static void
1978 dashutdown(void * arg, int howto)
1979 {
1980 	struct cam_periph *periph;
1981 	struct da_softc *softc;
1982 
1983 	TAILQ_FOREACH(periph, &dadriver.units, unit_links) {
1984 		union ccb ccb;
1985 
1986 		cam_periph_lock(periph);
1987 		softc = (struct da_softc *)periph->softc;
1988 
1989 		/*
1990 		 * We only sync the cache if the drive is still open, and
1991 		 * if the drive is capable of it..
1992 		 */
1993 		if (((softc->flags & DA_FLAG_OPEN) == 0)
1994 		 || (softc->quirks & DA_Q_NO_SYNC_CACHE)) {
1995 			cam_periph_unlock(periph);
1996 			continue;
1997 		}
1998 
1999 		xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/1);
2000 
2001 		ccb.ccb_h.ccb_state = DA_CCB_DUMP;
2002 		scsi_synchronize_cache(&ccb.csio,
2003 				       /*retries*/1,
2004 				       /*cbfcnp*/dadone,
2005 				       MSG_SIMPLE_Q_TAG,
2006 				       /*begin_lba*/0, /* whole disk */
2007 				       /*lb_count*/0,
2008 				       SSD_FULL_SIZE,
2009 				       60 * 60 * 1000);
2010 
2011 		xpt_polled_action(&ccb);
2012 
2013 		if ((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
2014 			if (((ccb.ccb_h.status & CAM_STATUS_MASK) ==
2015 			     CAM_SCSI_STATUS_ERROR)
2016 			 && (ccb.csio.scsi_status == SCSI_STATUS_CHECK_COND)){
2017 				int error_code, sense_key, asc, ascq;
2018 
2019 				scsi_extract_sense(&ccb.csio.sense_data,
2020 						   &error_code, &sense_key,
2021 						   &asc, &ascq);
2022 
2023 				if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
2024 					scsi_sense_print(&ccb.csio);
2025 			} else {
2026 				xpt_print(periph->path, "Synchronize "
2027 				    "cache failed, status == 0x%x, scsi status "
2028 				    "== 0x%x\n", ccb.ccb_h.status,
2029 				    ccb.csio.scsi_status);
2030 			}
2031 		}
2032 
2033 		if ((ccb.ccb_h.status & CAM_DEV_QFRZN) != 0)
2034 			cam_release_devq(ccb.ccb_h.path,
2035 					 /*relsim_flags*/0,
2036 					 /*reduction*/0,
2037 					 /*timeout*/0,
2038 					 /*getcount_only*/0);
2039 		cam_periph_unlock(periph);
2040 	}
2041 }
2042 
2043 #else /* !_KERNEL */
2044 
2045 /*
2046  * XXX This is only left out of the kernel build to silence warnings.  If,
2047  * for some reason this function is used in the kernel, the ifdefs should
2048  * be moved so it is included both in the kernel and userland.
2049  */
2050 void
2051 scsi_format_unit(struct ccb_scsiio *csio, u_int32_t retries,
2052 		 void (*cbfcnp)(struct cam_periph *, union ccb *),
2053 		 u_int8_t tag_action, u_int8_t byte2, u_int16_t ileave,
2054 		 u_int8_t *data_ptr, u_int32_t dxfer_len, u_int8_t sense_len,
2055 		 u_int32_t timeout)
2056 {
2057 	struct scsi_format_unit *scsi_cmd;
2058 
2059 	scsi_cmd = (struct scsi_format_unit *)&csio->cdb_io.cdb_bytes;
2060 	scsi_cmd->opcode = FORMAT_UNIT;
2061 	scsi_cmd->byte2 = byte2;
2062 	scsi_ulto2b(ileave, scsi_cmd->interleave);
2063 
2064 	cam_fill_csio(csio,
2065 		      retries,
2066 		      cbfcnp,
2067 		      /*flags*/ (dxfer_len > 0) ? CAM_DIR_OUT : CAM_DIR_NONE,
2068 		      tag_action,
2069 		      data_ptr,
2070 		      dxfer_len,
2071 		      sense_len,
2072 		      sizeof(*scsi_cmd),
2073 		      timeout);
2074 }
2075 
2076 #endif /* _KERNEL */
2077