xref: /freebsd/sys/cam/scsi/scsi_da.c (revision 9207b4cff7b8d483f4dd3c62266c2b58819eb7f9)
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  * $FreeBSD$
29  */
30 
31 #ifdef _KERNEL
32 #include "opt_hw_wdog.h"
33 #endif /* _KERNEL */
34 
35 #include <sys/param.h>
36 
37 #ifdef _KERNEL
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/bio.h>
41 #include <sys/sysctl.h>
42 #endif /* _KERNEL */
43 
44 #include <sys/devicestat.h>
45 #include <sys/conf.h>
46 #include <sys/disk.h>
47 #include <sys/eventhandler.h>
48 #include <sys/malloc.h>
49 #include <sys/cons.h>
50 
51 #include <machine/md_var.h>
52 
53 #include <vm/vm.h>
54 #include <vm/pmap.h>
55 
56 #ifndef _KERNEL
57 #include <stdio.h>
58 #include <string.h>
59 #endif /* _KERNEL */
60 
61 #include <cam/cam.h>
62 #include <cam/cam_ccb.h>
63 #include <cam/cam_extend.h>
64 #include <cam/cam_periph.h>
65 #include <cam/cam_xpt_periph.h>
66 
67 #include <cam/scsi/scsi_message.h>
68 
69 #ifndef _KERNEL
70 #include <cam/scsi/scsi_da.h>
71 #endif /* !_KERNEL */
72 
73 #ifdef _KERNEL
74 typedef enum {
75 	DA_STATE_PROBE,
76 	DA_STATE_NORMAL
77 } da_state;
78 
79 typedef enum {
80 	DA_FLAG_PACK_INVALID	= 0x001,
81 	DA_FLAG_NEW_PACK	= 0x002,
82 	DA_FLAG_PACK_LOCKED	= 0x004,
83 	DA_FLAG_PACK_REMOVABLE	= 0x008,
84 	DA_FLAG_TAGGED_QUEUING	= 0x010,
85 	DA_FLAG_NEED_OTAG	= 0x020,
86 	DA_FLAG_WENT_IDLE	= 0x040,
87 	DA_FLAG_RETRY_UA	= 0x080,
88 	DA_FLAG_OPEN		= 0x100
89 } da_flags;
90 
91 typedef enum {
92 	DA_Q_NONE		= 0x00,
93 	DA_Q_NO_SYNC_CACHE	= 0x01,
94 	DA_Q_NO_6_BYTE		= 0x02
95 } da_quirks;
96 
97 typedef enum {
98 	DA_CCB_PROBE		= 0x01,
99 	DA_CCB_BUFFER_IO	= 0x02,
100 	DA_CCB_WAITING		= 0x03,
101 	DA_CCB_DUMP		= 0x04,
102 	DA_CCB_TYPE_MASK	= 0x0F,
103 	DA_CCB_RETRY_UA		= 0x10
104 } da_ccb_state;
105 
106 /* Offsets into our private area for storing information */
107 #define ccb_state	ppriv_field0
108 #define ccb_bp		ppriv_ptr1
109 
110 struct disk_params {
111 	u_int8_t  heads;
112 	u_int16_t cylinders;
113 	u_int8_t  secs_per_track;
114 	u_int32_t secsize;	/* Number of bytes/sector */
115 	u_int32_t sectors;	/* total number sectors */
116 };
117 
118 struct da_softc {
119 	struct	 bio_queue_head bio_queue;
120 	struct	 devstat device_stats;
121 	SLIST_ENTRY(da_softc) links;
122 	LIST_HEAD(, ccb_hdr) pending_ccbs;
123 	da_state state;
124 	da_flags flags;
125 	da_quirks quirks;
126 	int	 minimum_cmd_size;
127 	int	 ordered_tag_count;
128 	struct	 disk_params params;
129 	struct	 disk disk;
130 	union	 ccb saved_ccb;
131 	dev_t    dev;
132 };
133 
134 struct da_quirk_entry {
135 	struct scsi_inquiry_pattern inq_pat;
136 	da_quirks quirks;
137 };
138 
139 static const char quantum[] = "QUANTUM";
140 static const char microp[] = "MICROP";
141 
142 static struct da_quirk_entry da_quirk_table[] =
143 {
144 	{
145 		/*
146 		 * Fujitsu M2513A MO drives.
147 		 * Tested devices: M2513A2 firmware versions 1200 & 1300.
148 		 * (dip switch selects whether T_DIRECT or T_OPTICAL device)
149 		 * Reported by: W.Scholten <whs@xs4all.nl>
150 		 */
151 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
152 		/*quirks*/ DA_Q_NO_SYNC_CACHE
153 	},
154 	{
155 		/* See above. */
156 		{T_OPTICAL, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
157 		/*quirks*/ DA_Q_NO_SYNC_CACHE
158 	},
159 	{
160 		/*
161 		 * This particular Fujitsu drive doesn't like the
162 		 * synchronize cache command.
163 		 * Reported by: Tom Jackson <toj@gorilla.net>
164 		 */
165 		{T_DIRECT, SIP_MEDIA_FIXED, "FUJITSU", "M2954*", "*"},
166 		/*quirks*/ DA_Q_NO_SYNC_CACHE
167 
168 	},
169 	{
170 		/*
171 		 * This drive doesn't like the synchronize cache command
172 		 * either.  Reported by: Matthew Jacob <mjacob@feral.com>
173 		 * in NetBSD PR kern/6027, August 24, 1998.
174 		 */
175 		{T_DIRECT, SIP_MEDIA_FIXED, microp, "2217*", "*"},
176 		/*quirks*/ DA_Q_NO_SYNC_CACHE
177 	},
178 	{
179 		/*
180 		 * This drive doesn't like the synchronize cache command
181 		 * either.  Reported by: Hellmuth Michaelis (hm@kts.org)
182 		 * (PR 8882).
183 		 */
184 		{T_DIRECT, SIP_MEDIA_FIXED, microp, "2112*", "*"},
185 		/*quirks*/ DA_Q_NO_SYNC_CACHE
186 	},
187 	{
188 		/*
189 		 * Doesn't like the synchronize cache command.
190 		 * Reported by: Blaz Zupan <blaz@gold.amis.net>
191 		 */
192 		{T_DIRECT, SIP_MEDIA_FIXED, "NEC", "D3847*", "*"},
193 		/*quirks*/ DA_Q_NO_SYNC_CACHE
194 	},
195 	{
196 		/*
197 		 * Doesn't like the synchronize cache command.
198 		 */
199 		{T_DIRECT, SIP_MEDIA_FIXED, quantum, "MAVERICK 540S", "*"},
200 		/*quirks*/ DA_Q_NO_SYNC_CACHE
201 	},
202 	{
203 		/*
204 		 * Doesn't like the synchronize cache command.
205 		 */
206 		{T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS525S", "*"},
207 		/*quirks*/ DA_Q_NO_SYNC_CACHE
208 	},
209 	{
210 		/*
211 		 * Doesn't work correctly with 6 byte reads/writes.
212 		 * Returns illegal request, and points to byte 9 of the
213 		 * 6-byte CDB.
214 		 * Reported by:  Adam McDougall <bsdx@spawnet.com>
215 		 */
216 		{T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 4*", "*"},
217 		/*quirks*/ DA_Q_NO_6_BYTE
218 	},
219 	{
220 		/*
221 		 * See above.
222 		 */
223 		{T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 2*", "*"},
224 		/*quirks*/ DA_Q_NO_6_BYTE
225 	},
226 
227 	/* Below a list of quirks for USB devices supported by umass. */
228 	{
229 		/*
230 		 * This USB floppy drive uses the UFI command set. This
231 		 * command set is a derivative of the ATAPI command set and
232 		 * does not support READ_6 commands only READ_10. It also does
233 		 * not support sync cache (0x35).
234 		 */
235 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Y-E DATA", "USB-FDU", "*"},
236 		/*quirks*/ DA_Q_NO_6_BYTE|DA_Q_NO_SYNC_CACHE
237 	},
238 	{
239 		/* Another USB floppy */
240 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "MATSHITA", "FDD CF-VFDU*","*"},
241 		/*quirks*/ DA_Q_NO_6_BYTE|DA_Q_NO_SYNC_CACHE
242 	},
243 	{
244 		/*
245 		 * Sony Memory Stick adapter MSAC-US1 and
246 		 * Sony PCG-C1VJ Internal Memory Stick Slot (MSC-U01).
247 		 * Make all sony MS* products use this quirk.
248 		 */
249 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Sony", "MS*", "*"},
250 		/*quirks*/ DA_Q_NO_6_BYTE|DA_Q_NO_SYNC_CACHE
251 	},
252 	{
253 		/*
254 		 * Sony Memory Stick adapter for the CLIE series
255 		 * of PalmOS PDA's
256 		 */
257 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Sony", "CLIE*", "*"},
258 		/*quirks*/ DA_Q_NO_6_BYTE|DA_Q_NO_SYNC_CACHE
259 	},
260 	{
261 		/*
262 		 * Sony DSC cameras (DSC-S30, DSC-S50, DSC-S70)
263 		 */
264 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "Sony", "Sony DSC", "*"},
265 		/*quirks*/ DA_Q_NO_6_BYTE|DA_Q_NO_SYNC_CACHE
266 	},
267         {
268 		/*
269 		 * Maxtor 3000LE USB Drive
270 		 */
271 		{T_DIRECT, SIP_MEDIA_FIXED, "MAXTOR*", "K040H2*", "*"},
272 		/*quirks*/ DA_Q_NO_6_BYTE
273 	},
274 	{
275 		{T_OPTICAL, SIP_MEDIA_REMOVABLE, "FUJITSU", "MCF3064AP", "*"},
276 		/*quirks*/ DA_Q_NO_6_BYTE
277 	},
278 	{
279 		/*
280 		 * Microtech USB CameraMate
281 		 */
282 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "eUSB    Compact*", "Compact Flash*", "*"},
283 		/*quirks*/ DA_Q_NO_6_BYTE|DA_Q_NO_SYNC_CACHE
284 	},
285 	{
286 		/*
287 		 * The vendor, product and version strings coming from the
288 		 * controller are null terminated instead of being padded with
289 		 * spaces. The trailing wildcard character '*' is required.
290 		 */
291 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "SMSC*", "USB FDC*","*"},
292 		/*quirks*/ DA_Q_NO_6_BYTE|DA_Q_NO_SYNC_CACHE
293 	},
294         {
295 		/*
296 		 * Olympus digital cameras (C-3040ZOOM, C-2040ZOOM, C-1)
297 		 */
298 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "OLYMPUS", "C-*", "*"},
299 		/*quirks*/ DA_Q_NO_6_BYTE|DA_Q_NO_SYNC_CACHE
300 	},
301 	{
302 		/*
303 		 * Olympus digital cameras (D-370)
304 		 */
305 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "OLYMPUS", "D-*", "*"},
306 		/*quirks*/ DA_Q_NO_6_BYTE
307 	},
308 	{
309 		/*
310 		 * Olympus E-100RS digital camera.
311 		 * Reported by:	Bernd Walter <ticso@cicely8.cicely.de>
312 		 * XXX See above; its likely all Olympus digital cameras
313 		 *     have the same quirk, but I cannot confirm. - kbyanc
314 		 */
315 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "OLYMPUS", "E-100RS", "*"},
316 		/*quirks*/ DA_Q_NO_6_BYTE|DA_Q_NO_SYNC_CACHE
317 	},
318         {
319 		/*
320 		 * KingByte Pen Drives
321 		 */
322 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "NO BRAND", "PEN DRIVE", "*"},
323 		/*quirks*/ DA_Q_NO_6_BYTE|DA_Q_NO_SYNC_CACHE
324  	},
325  	{
326 		/*
327 		 * FujiFilm Camera
328 		 */
329  		{T_DIRECT, SIP_MEDIA_REMOVABLE, "FUJIFILMUSB-DRIVEUNIT", "USB-DRIVEUNIT", "*"},
330  		/*quirks*/ DA_Q_NO_6_BYTE|DA_Q_NO_SYNC_CACHE
331  	},
332 	{
333 		/*
334 		 * Nikon Coolpix 995
335 		 */
336 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "NIKON", "NIKON DSC E995", "*"},
337 		/*quirks*/ DA_Q_NO_6_BYTE
338 	},
339 	{
340 		/*
341 		 * Minolta Dimage 2330
342 		 */
343 		{T_DIRECT, SIP_MEDIA_REMOVABLE, "MINOLTA", "DIMAGE 2330*", "*"},
344 		/*quirks*/ DA_Q_NO_6_BYTE
345 	}
346 };
347 
348 static	d_open_t	daopen;
349 static	d_close_t	daclose;
350 static	d_strategy_t	dastrategy;
351 static	d_ioctl_t	daioctl;
352 static	d_dump_t	dadump;
353 static	periph_init_t	dainit;
354 static	void		daasync(void *callback_arg, u_int32_t code,
355 				struct cam_path *path, void *arg);
356 static	periph_ctor_t	daregister;
357 static	periph_dtor_t	dacleanup;
358 static	periph_start_t	dastart;
359 static	periph_oninv_t	daoninvalidate;
360 static	void		dadone(struct cam_periph *periph,
361 			       union ccb *done_ccb);
362 static  int		daerror(union ccb *ccb, u_int32_t cam_flags,
363 				u_int32_t sense_flags);
364 static void		daprevent(struct cam_periph *periph, int action);
365 static void		dasetgeom(struct cam_periph *periph,
366 				  struct scsi_read_capacity_data * rdcap);
367 static timeout_t	dasendorderedtag;
368 static void		dashutdown(void *arg, int howto);
369 
370 #ifndef DA_DEFAULT_TIMEOUT
371 #define DA_DEFAULT_TIMEOUT 60	/* Timeout in seconds */
372 #endif
373 
374 #ifndef	DA_DEFAULT_RETRY
375 #define	DA_DEFAULT_RETRY	4
376 #endif
377 
378 static int da_retry_count = DA_DEFAULT_RETRY;
379 static int da_default_timeout = DA_DEFAULT_TIMEOUT;
380 
381 SYSCTL_NODE(_kern, OID_AUTO, cam, CTLFLAG_RD, 0, "CAM Subsystem");
382 SYSCTL_NODE(_kern_cam, OID_AUTO, da, CTLFLAG_RD, 0,
383             "CAM Direct Access Disk driver");
384 SYSCTL_INT(_kern_cam_da, OID_AUTO, retry_count, CTLFLAG_RW,
385            &da_retry_count, 0, "Normal I/O retry count");
386 SYSCTL_INT(_kern_cam_da, OID_AUTO, default_timeout, CTLFLAG_RW,
387            &da_default_timeout, 0, "Normal I/O timeout (in seconds)");
388 
389 /*
390  * DA_ORDEREDTAG_INTERVAL determines how often, relative
391  * to the default timeout, we check to see whether an ordered
392  * tagged transaction is appropriate to prevent simple tag
393  * starvation.  Since we'd like to ensure that there is at least
394  * 1/2 of the timeout length left for a starved transaction to
395  * complete after we've sent an ordered tag, we must poll at least
396  * four times in every timeout period.  This takes care of the worst
397  * case where a starved transaction starts during an interval that
398  * meets the requirement "don't send an ordered tag" test so it takes
399  * us two intervals to determine that a tag must be sent.
400  */
401 #ifndef DA_ORDEREDTAG_INTERVAL
402 #define DA_ORDEREDTAG_INTERVAL 4
403 #endif
404 
405 static struct periph_driver dadriver =
406 {
407 	dainit, "da",
408 	TAILQ_HEAD_INITIALIZER(dadriver.units), /* generation */ 0
409 };
410 
411 PERIPHDRIVER_DECLARE(da, dadriver);
412 
413 #define DA_CDEV_MAJOR 13
414 
415 /* For 2.2-stable support */
416 #ifndef D_DISK
417 #define D_DISK 0
418 #endif
419 
420 static struct cdevsw da_cdevsw = {
421 	/* open */	daopen,
422 	/* close */	daclose,
423 	/* read */	physread,
424 	/* write */	physwrite,
425 	/* ioctl */	daioctl,
426 	/* poll */	nopoll,
427 	/* mmap */	nommap,
428 	/* strategy */	dastrategy,
429 	/* name */	"da",
430 	/* maj */	DA_CDEV_MAJOR,
431 	/* dump */	dadump,
432 	/* psize */	nopsize,
433 	/* flags */	D_DISK,
434 };
435 
436 static struct cdevsw dadisk_cdevsw;
437 
438 static SLIST_HEAD(,da_softc) softc_list;
439 static struct extend_array *daperiphs;
440 
441 static int
442 daopen(dev_t dev, int flags, int fmt, struct thread *td)
443 {
444 	struct cam_periph *periph;
445 	struct da_softc *softc;
446 	struct disklabel *label;
447 	struct scsi_read_capacity_data *rcap;
448 	union  ccb *ccb;
449 	int unit;
450 	int part;
451 	int error;
452 	int s;
453 
454 	unit = dkunit(dev);
455 	part = dkpart(dev);
456 	s = splsoftcam();
457 	periph = cam_extend_get(daperiphs, unit);
458 	if (periph == NULL) {
459 		splx(s);
460 		return (ENXIO);
461 	}
462 
463 	softc = (struct da_softc *)periph->softc;
464 
465 	CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
466 	    ("daopen: dev=%s (unit %d , partition %d)\n", devtoname(dev),
467 	     unit, part));
468 
469 	if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0)
470 		return (error); /* error code from tsleep */
471 
472 	if (cam_periph_acquire(periph) != CAM_REQ_CMP)
473 		return(ENXIO);
474 	softc->flags |= DA_FLAG_OPEN;
475 
476 	if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
477 		/* Invalidate our pack information. */
478 		disk_invalidate(&softc->disk);
479 		softc->flags &= ~DA_FLAG_PACK_INVALID;
480 	}
481 	splx(s);
482 
483 	/* Do a read capacity */
484 	rcap = (struct scsi_read_capacity_data *)malloc(sizeof(*rcap),
485 							M_TEMP,
486 							M_WAITOK);
487 
488 	ccb = cam_periph_getccb(periph, /*priority*/1);
489 	scsi_read_capacity(&ccb->csio,
490 			   /*retries*/4,
491 			   /*cbfncp*/dadone,
492 			   MSG_SIMPLE_Q_TAG,
493 			   rcap,
494 			   SSD_FULL_SIZE,
495 			   /*timeout*/60000);
496 	ccb->ccb_h.ccb_bp = NULL;
497 
498 	error = cam_periph_runccb(ccb, daerror,
499 				  /*cam_flags*/CAM_RETRY_SELTO,
500 				  /*sense_flags*/SF_RETRY_UA,
501 				  &softc->device_stats);
502 
503 	if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
504 		cam_release_devq(ccb->ccb_h.path,
505 				 /*relsim_flags*/0,
506 				 /*reduction*/0,
507 				 /*timeout*/0,
508 				 /*getcount_only*/0);
509 	xpt_release_ccb(ccb);
510 
511 	if (error == 0)
512 		dasetgeom(periph, rcap);
513 
514 	free(rcap, M_TEMP);
515 
516 	if (error == 0) {
517 		struct ccb_getdev cgd;
518 
519 		/* Build label for whole disk. */
520 		label = &softc->disk.d_label;
521 		bzero(label, sizeof(*label));
522 		label->d_type = DTYPE_SCSI;
523 
524 		/*
525 		 * Grab the inquiry data to get the vendor and product names.
526 		 * Put them in the typename and packname for the label.
527 		 */
528 		xpt_setup_ccb(&cgd.ccb_h, periph->path, /*priority*/ 1);
529 		cgd.ccb_h.func_code = XPT_GDEV_TYPE;
530 		xpt_action((union ccb *)&cgd);
531 
532 		strncpy(label->d_typename, cgd.inq_data.vendor,
533 			min(SID_VENDOR_SIZE, sizeof(label->d_typename)));
534 		strncpy(label->d_packname, cgd.inq_data.product,
535 			min(SID_PRODUCT_SIZE, sizeof(label->d_packname)));
536 
537 		label->d_secsize = softc->params.secsize;
538 		label->d_nsectors = softc->params.secs_per_track;
539 		label->d_ntracks = softc->params.heads;
540 		label->d_ncylinders = softc->params.cylinders;
541 		label->d_secpercyl = softc->params.heads
542 				  * softc->params.secs_per_track;
543 		label->d_secperunit = softc->params.sectors;
544 
545 		/*
546 		 * Check to see whether or not the blocksize is set yet.
547 		 * If it isn't, set it and then clear the blocksize
548 		 * unavailable flag for the device statistics.
549 		 */
550 		if ((softc->device_stats.flags & DEVSTAT_BS_UNAVAILABLE) != 0){
551 			softc->device_stats.block_size = softc->params.secsize;
552 			softc->device_stats.flags &= ~DEVSTAT_BS_UNAVAILABLE;
553 		}
554 	}
555 
556 	if (error == 0) {
557 		if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0)
558 			daprevent(periph, PR_PREVENT);
559 	}
560 	cam_periph_unlock(periph);
561 	return (error);
562 }
563 
564 static int
565 daclose(dev_t dev, int flag, int fmt, struct thread *td)
566 {
567 	struct	cam_periph *periph;
568 	struct	da_softc *softc;
569 	int	unit;
570 	int	error;
571 
572 	unit = dkunit(dev);
573 	periph = cam_extend_get(daperiphs, unit);
574 	if (periph == NULL)
575 		return (ENXIO);
576 
577 	softc = (struct da_softc *)periph->softc;
578 
579 	if ((error = cam_periph_lock(periph, PRIBIO)) != 0) {
580 		return (error); /* error code from tsleep */
581 	}
582 
583 	if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
584 		union	ccb *ccb;
585 
586 		ccb = cam_periph_getccb(periph, /*priority*/1);
587 
588 		scsi_synchronize_cache(&ccb->csio,
589 				       /*retries*/1,
590 				       /*cbfcnp*/dadone,
591 				       MSG_SIMPLE_Q_TAG,
592 				       /*begin_lba*/0,/* Cover the whole disk */
593 				       /*lb_count*/0,
594 				       SSD_FULL_SIZE,
595 				       5 * 60 * 1000);
596 
597 		cam_periph_runccb(ccb, /*error_routine*/NULL, /*cam_flags*/0,
598 				  /*sense_flags*/SF_RETRY_UA,
599 				  &softc->device_stats);
600 
601 		if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
602 			if ((ccb->ccb_h.status & CAM_STATUS_MASK) ==
603 			     CAM_SCSI_STATUS_ERROR) {
604 				int asc, ascq;
605 				int sense_key, error_code;
606 
607 				scsi_extract_sense(&ccb->csio.sense_data,
608 						   &error_code,
609 						   &sense_key,
610 						   &asc, &ascq);
611 				if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
612 					scsi_sense_print(&ccb->csio);
613 			} else {
614 				xpt_print_path(periph->path);
615 				printf("Synchronize cache failed, status "
616 				       "== 0x%x, scsi status == 0x%x\n",
617 				       ccb->csio.ccb_h.status,
618 				       ccb->csio.scsi_status);
619 			}
620 		}
621 
622 		if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
623 			cam_release_devq(ccb->ccb_h.path,
624 					 /*relsim_flags*/0,
625 					 /*reduction*/0,
626 					 /*timeout*/0,
627 					 /*getcount_only*/0);
628 
629 		xpt_release_ccb(ccb);
630 
631 	}
632 
633 	if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0) {
634 		daprevent(periph, PR_ALLOW);
635 		/*
636 		 * If we've got removeable media, mark the blocksize as
637 		 * unavailable, since it could change when new media is
638 		 * inserted.
639 		 */
640 		softc->device_stats.flags |= DEVSTAT_BS_UNAVAILABLE;
641 	}
642 
643 	softc->flags &= ~DA_FLAG_OPEN;
644 	cam_periph_unlock(periph);
645 	cam_periph_release(periph);
646 	return (0);
647 }
648 
649 /*
650  * Actually translate the requested transfer into one the physical driver
651  * can understand.  The transfer is described by a buf and will include
652  * only one physical transfer.
653  */
654 static void
655 dastrategy(struct bio *bp)
656 {
657 	struct cam_periph *periph;
658 	struct da_softc *softc;
659 	u_int  unit;
660 	u_int  part;
661 	int    s;
662 
663 	unit = dkunit(bp->bio_dev);
664 	part = dkpart(bp->bio_dev);
665 	periph = cam_extend_get(daperiphs, unit);
666 	if (periph == NULL) {
667 		biofinish(bp, NULL, ENXIO);
668 		return;
669 	}
670 	softc = (struct da_softc *)periph->softc;
671 #if 0
672 	/*
673 	 * check it's not too big a transfer for our adapter
674 	 */
675 	scsi_minphys(bp,&sd_switch);
676 #endif
677 
678 	/*
679 	 * Mask interrupts so that the pack cannot be invalidated until
680 	 * after we are in the queue.  Otherwise, we might not properly
681 	 * clean up one of the buffers.
682 	 */
683 	s = splbio();
684 
685 	/*
686 	 * If the device has been made invalid, error out
687 	 */
688 	if ((softc->flags & DA_FLAG_PACK_INVALID)) {
689 		splx(s);
690 		biofinish(bp, NULL, ENXIO);
691 		return;
692 	}
693 
694 	/*
695 	 * Place it in the queue of disk activities for this disk
696 	 */
697 	bioqdisksort(&softc->bio_queue, bp);
698 
699 	splx(s);
700 
701 	/*
702 	 * Schedule ourselves for performing the work.
703 	 */
704 	xpt_schedule(periph, /* XXX priority */1);
705 
706 	return;
707 }
708 
709 /* For 2.2-stable support */
710 #ifndef ENOIOCTL
711 #define ENOIOCTL -1
712 #endif
713 
714 static int
715 daioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
716 {
717 	struct cam_periph *periph;
718 	struct da_softc *softc;
719 	int unit;
720 	int error;
721 
722 	unit = dkunit(dev);
723 	periph = cam_extend_get(daperiphs, unit);
724 	if (periph == NULL)
725 		return (ENXIO);
726 
727 	softc = (struct da_softc *)periph->softc;
728 
729 	CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("daioctl\n"));
730 
731 	if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0) {
732 		return (error); /* error code from tsleep */
733 	}
734 
735 	error = cam_periph_ioctl(periph, cmd, addr, daerror);
736 
737 	cam_periph_unlock(periph);
738 
739 	return (error);
740 }
741 
742 static int
743 dadump(dev_t dev)
744 {
745 	struct	    cam_periph *periph;
746 	struct	    da_softc *softc;
747 	u_int	    unit;
748 	u_int	    part;
749 	u_int	    secsize;
750 	u_int	    num;	/* number of sectors to write */
751 	u_int	    blknum;
752 	long	    blkcnt;
753 	vm_offset_t addr;
754 	struct	    ccb_scsiio csio;
755 	int         dumppages = MAXDUMPPGS;
756 	int	    error;
757 	int         i;
758 
759 	/* toss any characters present prior to dump */
760 	while (cncheckc() != -1)
761 		;
762 
763 	unit = dkunit(dev);
764 	part = dkpart(dev);
765 	periph = cam_extend_get(daperiphs, unit);
766 	if (periph == NULL) {
767 		return (ENXIO);
768 	}
769 	softc = (struct da_softc *)periph->softc;
770 
771 	if ((softc->flags & DA_FLAG_PACK_INVALID) != 0)
772 		return (ENXIO);
773 
774 	error = disk_dumpcheck(dev, &num, &blknum, &secsize);
775 	if (error)
776 		return (error);
777 
778 	addr = 0;	/* starting address */
779 	blkcnt = howmany(PAGE_SIZE, secsize);
780 
781 	while (num > 0) {
782 		caddr_t va = NULL;
783 
784 		if ((num / blkcnt) < dumppages)
785 			dumppages = num / blkcnt;
786 
787 		for (i = 0; i < dumppages; ++i) {
788 			vm_offset_t a = addr + (i * PAGE_SIZE);
789 			if (is_physical_memory(a))
790 				va = pmap_kenter_temporary(trunc_page(a), i);
791 			else
792 				va = pmap_kenter_temporary(trunc_page(0), i);
793 		}
794 
795 		xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
796 		csio.ccb_h.ccb_state = DA_CCB_DUMP;
797 		scsi_read_write(&csio,
798 				/*retries*/1,
799 				dadone,
800 				MSG_ORDERED_Q_TAG,
801 				/*read*/FALSE,
802 				/*byte2*/0,
803 				/*minimum_cmd_size*/ softc->minimum_cmd_size,
804 				blknum,
805 				blkcnt * dumppages,
806 				/*data_ptr*/(u_int8_t *) va,
807 				/*dxfer_len*/blkcnt * secsize * dumppages,
808 				/*sense_len*/SSD_FULL_SIZE,
809 				DA_DEFAULT_TIMEOUT * 1000);
810 		xpt_polled_action((union ccb *)&csio);
811 
812 		if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
813 			printf("Aborting dump due to I/O error.\n");
814 			if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
815 			     CAM_SCSI_STATUS_ERROR)
816 				scsi_sense_print(&csio);
817 			else
818 				printf("status == 0x%x, scsi status == 0x%x\n",
819 				       csio.ccb_h.status, csio.scsi_status);
820 			return(EIO);
821 		}
822 
823 		if (dumpstatus(addr, (off_t)num * softc->params.secsize) < 0)
824 			return (EINTR);
825 
826 		/* update block count */
827 		num -= blkcnt * dumppages;
828 		blknum += blkcnt * dumppages;
829 		addr += PAGE_SIZE * dumppages;
830 	}
831 
832 	/*
833 	 * Sync the disk cache contents to the physical media.
834 	 */
835 	if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
836 
837 		xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
838 		csio.ccb_h.ccb_state = DA_CCB_DUMP;
839 		scsi_synchronize_cache(&csio,
840 				       /*retries*/1,
841 				       /*cbfcnp*/dadone,
842 				       MSG_SIMPLE_Q_TAG,
843 				       /*begin_lba*/0,/* Cover the whole disk */
844 				       /*lb_count*/0,
845 				       SSD_FULL_SIZE,
846 				       5 * 60 * 1000);
847 		xpt_polled_action((union ccb *)&csio);
848 
849 		if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
850 			if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
851 			     CAM_SCSI_STATUS_ERROR) {
852 				int asc, ascq;
853 				int sense_key, error_code;
854 
855 				scsi_extract_sense(&csio.sense_data,
856 						   &error_code,
857 						   &sense_key,
858 						   &asc, &ascq);
859 				if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
860 					scsi_sense_print(&csio);
861 			} else {
862 				xpt_print_path(periph->path);
863 				printf("Synchronize cache failed, status "
864 				       "== 0x%x, scsi status == 0x%x\n",
865 				       csio.ccb_h.status, csio.scsi_status);
866 			}
867 		}
868 	}
869 	return (0);
870 }
871 
872 static void
873 dainit(void)
874 {
875 	cam_status status;
876 	struct cam_path *path;
877 
878 	/*
879 	 * Create our extend array for storing the devices we attach to.
880 	 */
881 	daperiphs = cam_extend_new();
882 	SLIST_INIT(&softc_list);
883 	if (daperiphs == NULL) {
884 		printf("da: Failed to alloc extend array!\n");
885 		return;
886 	}
887 
888 	/*
889 	 * Install a global async callback.  This callback will
890 	 * receive async callbacks like "new device found".
891 	 */
892 	status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
893 				 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
894 
895 	if (status == CAM_REQ_CMP) {
896 		struct ccb_setasync csa;
897 
898                 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
899                 csa.ccb_h.func_code = XPT_SASYNC_CB;
900                 csa.event_enable = AC_FOUND_DEVICE;
901                 csa.callback = daasync;
902                 csa.callback_arg = NULL;
903                 xpt_action((union ccb *)&csa);
904 		status = csa.ccb_h.status;
905                 xpt_free_path(path);
906         }
907 
908 	if (status != CAM_REQ_CMP) {
909 		printf("da: Failed to attach master async callback "
910 		       "due to status 0x%x!\n", status);
911 	} else {
912 
913 		/*
914 		 * Schedule a periodic event to occasionally send an
915 		 * ordered tag to a device.
916 		 */
917 		timeout(dasendorderedtag, NULL,
918 			(DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL);
919 
920 		/* Register our shutdown event handler */
921 		if ((EVENTHANDLER_REGISTER(shutdown_post_sync, dashutdown,
922 					   NULL, SHUTDOWN_PRI_DEFAULT)) == NULL)
923 		    printf("dainit: shutdown event registration failed!\n");
924 	}
925 }
926 
927 static void
928 daoninvalidate(struct cam_periph *periph)
929 {
930 	int s;
931 	struct da_softc *softc;
932 	struct bio *q_bp;
933 	struct ccb_setasync csa;
934 
935 	softc = (struct da_softc *)periph->softc;
936 
937 	/*
938 	 * De-register any async callbacks.
939 	 */
940 	xpt_setup_ccb(&csa.ccb_h, periph->path,
941 		      /* priority */ 5);
942 	csa.ccb_h.func_code = XPT_SASYNC_CB;
943 	csa.event_enable = 0;
944 	csa.callback = daasync;
945 	csa.callback_arg = periph;
946 	xpt_action((union ccb *)&csa);
947 
948 	softc->flags |= DA_FLAG_PACK_INVALID;
949 
950 	/*
951 	 * Although the oninvalidate() routines are always called at
952 	 * splsoftcam, we need to be at splbio() here to keep the buffer
953 	 * queue from being modified while we traverse it.
954 	 */
955 	s = splbio();
956 
957 	/*
958 	 * Return all queued I/O with ENXIO.
959 	 * XXX Handle any transactions queued to the card
960 	 *     with XPT_ABORT_CCB.
961 	 */
962 	while ((q_bp = bioq_first(&softc->bio_queue)) != NULL){
963 		bioq_remove(&softc->bio_queue, q_bp);
964 		q_bp->bio_resid = q_bp->bio_bcount;
965 		biofinish(q_bp, NULL, ENXIO);
966 	}
967 	splx(s);
968 
969 	SLIST_REMOVE(&softc_list, softc, da_softc, links);
970 
971 	xpt_print_path(periph->path);
972 	printf("lost device\n");
973 }
974 
975 static void
976 dacleanup(struct cam_periph *periph)
977 {
978 	struct da_softc *softc;
979 
980 	softc = (struct da_softc *)periph->softc;
981 
982 	devstat_remove_entry(&softc->device_stats);
983 	cam_extend_release(daperiphs, periph->unit_number);
984 	xpt_print_path(periph->path);
985 	printf("removing device entry\n");
986 	if (softc->dev) {
987 		disk_destroy(softc->dev);
988 	}
989 	free(softc, M_DEVBUF);
990 }
991 
992 static void
993 daasync(void *callback_arg, u_int32_t code,
994 	struct cam_path *path, void *arg)
995 {
996 	struct cam_periph *periph;
997 
998 	periph = (struct cam_periph *)callback_arg;
999 	switch (code) {
1000 	case AC_FOUND_DEVICE:
1001 	{
1002 		struct ccb_getdev *cgd;
1003 		cam_status status;
1004 
1005 		cgd = (struct ccb_getdev *)arg;
1006 		if (cgd == NULL)
1007 			break;
1008 
1009 		if (SID_TYPE(&cgd->inq_data) != T_DIRECT
1010 		    && SID_TYPE(&cgd->inq_data) != T_OPTICAL)
1011 			break;
1012 
1013 		/*
1014 		 * Allocate a peripheral instance for
1015 		 * this device and start the probe
1016 		 * process.
1017 		 */
1018 		status = cam_periph_alloc(daregister, daoninvalidate,
1019 					  dacleanup, dastart,
1020 					  "da", CAM_PERIPH_BIO,
1021 					  cgd->ccb_h.path, daasync,
1022 					  AC_FOUND_DEVICE, cgd);
1023 
1024 		if (status != CAM_REQ_CMP
1025 		 && status != CAM_REQ_INPROG)
1026 			printf("daasync: Unable to attach to new device "
1027 				"due to status 0x%x\n", status);
1028 		break;
1029 	}
1030 	case AC_SENT_BDR:
1031 	case AC_BUS_RESET:
1032 	{
1033 		struct da_softc *softc;
1034 		struct ccb_hdr *ccbh;
1035 		int s;
1036 
1037 		softc = (struct da_softc *)periph->softc;
1038 		s = splsoftcam();
1039 		/*
1040 		 * Don't fail on the expected unit attention
1041 		 * that will occur.
1042 		 */
1043 		softc->flags |= DA_FLAG_RETRY_UA;
1044 		LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le)
1045 			ccbh->ccb_state |= DA_CCB_RETRY_UA;
1046 		splx(s);
1047 		/* FALLTHROUGH*/
1048 	}
1049 	default:
1050 		cam_periph_async(periph, code, path, arg);
1051 		break;
1052 	}
1053 }
1054 
1055 static cam_status
1056 daregister(struct cam_periph *periph, void *arg)
1057 {
1058 	int s;
1059 	struct da_softc *softc;
1060 	struct ccb_setasync csa;
1061 	struct ccb_getdev *cgd;
1062 	caddr_t match;
1063 
1064 	cgd = (struct ccb_getdev *)arg;
1065 	if (periph == NULL) {
1066 		printf("daregister: periph was NULL!!\n");
1067 		return(CAM_REQ_CMP_ERR);
1068 	}
1069 
1070 	if (cgd == NULL) {
1071 		printf("daregister: no getdev CCB, can't register device\n");
1072 		return(CAM_REQ_CMP_ERR);
1073 	}
1074 
1075 	softc = (struct da_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
1076 
1077 	if (softc == NULL) {
1078 		printf("daregister: Unable to probe new device. "
1079 		       "Unable to allocate softc\n");
1080 		return(CAM_REQ_CMP_ERR);
1081 	}
1082 
1083 	bzero(softc, sizeof(*softc));
1084 	LIST_INIT(&softc->pending_ccbs);
1085 	softc->state = DA_STATE_PROBE;
1086 	bioq_init(&softc->bio_queue);
1087 	if (SID_IS_REMOVABLE(&cgd->inq_data))
1088 		softc->flags |= DA_FLAG_PACK_REMOVABLE;
1089 	if ((cgd->inq_data.flags & SID_CmdQue) != 0)
1090 		softc->flags |= DA_FLAG_TAGGED_QUEUING;
1091 
1092 	periph->softc = softc;
1093 
1094 	cam_extend_set(daperiphs, periph->unit_number, periph);
1095 
1096 	/*
1097 	 * See if this device has any quirks.
1098 	 */
1099 	match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1100 			       (caddr_t)da_quirk_table,
1101 			       sizeof(da_quirk_table)/sizeof(*da_quirk_table),
1102 			       sizeof(*da_quirk_table), scsi_inquiry_match);
1103 
1104 	if (match != NULL)
1105 		softc->quirks = ((struct da_quirk_entry *)match)->quirks;
1106 	else
1107 		softc->quirks = DA_Q_NONE;
1108 
1109 	if (softc->quirks & DA_Q_NO_6_BYTE)
1110 		softc->minimum_cmd_size = 10;
1111 	else
1112 		softc->minimum_cmd_size = 6;
1113 
1114 	/*
1115 	 * Block our timeout handler while we
1116 	 * add this softc to the dev list.
1117 	 */
1118 	s = splsoftclock();
1119 	SLIST_INSERT_HEAD(&softc_list, softc, links);
1120 	splx(s);
1121 
1122 	/*
1123 	 * The DA driver supports a blocksize, but
1124 	 * we don't know the blocksize until we do
1125 	 * a read capacity.  So, set a flag to
1126 	 * indicate that the blocksize is
1127 	 * unavailable right now.  We'll clear the
1128 	 * flag as soon as we've done a read capacity.
1129 	 */
1130 	devstat_add_entry(&softc->device_stats, "da",
1131 			  periph->unit_number, 0,
1132 	  		  DEVSTAT_BS_UNAVAILABLE,
1133 			  SID_TYPE(&cgd->inq_data) | DEVSTAT_TYPE_IF_SCSI,
1134 			  DEVSTAT_PRIORITY_DISK);
1135 
1136 	/*
1137 	 * Register this media as a disk
1138 	 */
1139 	softc->dev = disk_create(periph->unit_number, &softc->disk, 0,
1140 	    &da_cdevsw, &dadisk_cdevsw);
1141 
1142 	/*
1143 	 * Add async callbacks for bus reset and
1144 	 * bus device reset calls.  I don't bother
1145 	 * checking if this fails as, in most cases,
1146 	 * the system will function just fine without
1147 	 * them and the only alternative would be to
1148 	 * not attach the device on failure.
1149 	 */
1150 	xpt_setup_ccb(&csa.ccb_h, periph->path, /*priority*/5);
1151 	csa.ccb_h.func_code = XPT_SASYNC_CB;
1152 	csa.event_enable = AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE;
1153 	csa.callback = daasync;
1154 	csa.callback_arg = periph;
1155 	xpt_action((union ccb *)&csa);
1156 	/*
1157 	 * Lock this peripheral until we are setup.
1158 	 * This first call can't block
1159 	 */
1160 	(void)cam_periph_lock(periph, PRIBIO);
1161 	xpt_schedule(periph, /*priority*/5);
1162 
1163 	return(CAM_REQ_CMP);
1164 }
1165 
1166 static void
1167 dastart(struct cam_periph *periph, union ccb *start_ccb)
1168 {
1169 	struct da_softc *softc;
1170 
1171 	softc = (struct da_softc *)periph->softc;
1172 
1173 
1174 	switch (softc->state) {
1175 	case DA_STATE_NORMAL:
1176 	{
1177 		/* Pull a buffer from the queue and get going on it */
1178 		struct bio *bp;
1179 		int s;
1180 
1181 		/*
1182 		 * See if there is a buf with work for us to do..
1183 		 */
1184 		s = splbio();
1185 		bp = bioq_first(&softc->bio_queue);
1186 		if (periph->immediate_priority <= periph->pinfo.priority) {
1187 			CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1188 					("queuing for immediate ccb\n"));
1189 			start_ccb->ccb_h.ccb_state = DA_CCB_WAITING;
1190 			SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1191 					  periph_links.sle);
1192 			periph->immediate_priority = CAM_PRIORITY_NONE;
1193 			splx(s);
1194 			wakeup(&periph->ccb_list);
1195 		} else if (bp == NULL) {
1196 			splx(s);
1197 			xpt_release_ccb(start_ccb);
1198 		} else {
1199 			int oldspl;
1200 			u_int8_t tag_code;
1201 
1202 			bioq_remove(&softc->bio_queue, bp);
1203 
1204 			devstat_start_transaction(&softc->device_stats);
1205 
1206 			if ((bp->bio_flags & BIO_ORDERED) != 0
1207 			 || (softc->flags & DA_FLAG_NEED_OTAG) != 0) {
1208 				softc->flags &= ~DA_FLAG_NEED_OTAG;
1209 				softc->ordered_tag_count++;
1210 				tag_code = MSG_ORDERED_Q_TAG;
1211 			} else {
1212 				tag_code = MSG_SIMPLE_Q_TAG;
1213 			}
1214 			scsi_read_write(&start_ccb->csio,
1215 					/*retries*/da_retry_count,
1216 					dadone,
1217 					tag_code,
1218 					bp->bio_cmd == BIO_READ,
1219 					/*byte2*/0,
1220 					softc->minimum_cmd_size,
1221 					bp->bio_pblkno,
1222 					bp->bio_bcount / softc->params.secsize,
1223 					bp->bio_data,
1224 					bp->bio_bcount,
1225 					/*sense_len*/SSD_FULL_SIZE,
1226 					da_default_timeout * 1000);
1227 			start_ccb->ccb_h.ccb_state = DA_CCB_BUFFER_IO;
1228 
1229 			/*
1230 			 * Block out any asyncronous callbacks
1231 			 * while we touch the pending ccb list.
1232 			 */
1233 			oldspl = splcam();
1234 			LIST_INSERT_HEAD(&softc->pending_ccbs,
1235 					 &start_ccb->ccb_h, periph_links.le);
1236 			splx(oldspl);
1237 
1238 			/* We expect a unit attention from this device */
1239 			if ((softc->flags & DA_FLAG_RETRY_UA) != 0) {
1240 				start_ccb->ccb_h.ccb_state |= DA_CCB_RETRY_UA;
1241 				softc->flags &= ~DA_FLAG_RETRY_UA;
1242 			}
1243 
1244 			start_ccb->ccb_h.ccb_bp = bp;
1245 			bp = bioq_first(&softc->bio_queue);
1246 			splx(s);
1247 
1248 			xpt_action(start_ccb);
1249 		}
1250 
1251 		if (bp != NULL) {
1252 			/* Have more work to do, so ensure we stay scheduled */
1253 			xpt_schedule(periph, /* XXX priority */1);
1254 		}
1255 		break;
1256 	}
1257 	case DA_STATE_PROBE:
1258 	{
1259 		struct ccb_scsiio *csio;
1260 		struct scsi_read_capacity_data *rcap;
1261 
1262 		rcap = (struct scsi_read_capacity_data *)malloc(sizeof(*rcap),
1263 								M_TEMP,
1264 								M_NOWAIT);
1265 		if (rcap == NULL) {
1266 			printf("dastart: Couldn't malloc read_capacity data\n");
1267 			/* da_free_periph??? */
1268 			break;
1269 		}
1270 		csio = &start_ccb->csio;
1271 		scsi_read_capacity(csio,
1272 				   /*retries*/4,
1273 				   dadone,
1274 				   MSG_SIMPLE_Q_TAG,
1275 				   rcap,
1276 				   SSD_FULL_SIZE,
1277 				   /*timeout*/5000);
1278 		start_ccb->ccb_h.ccb_bp = NULL;
1279 		start_ccb->ccb_h.ccb_state = DA_CCB_PROBE;
1280 		xpt_action(start_ccb);
1281 		break;
1282 	}
1283 	}
1284 }
1285 
1286 
1287 static void
1288 dadone(struct cam_periph *periph, union ccb *done_ccb)
1289 {
1290 	struct da_softc *softc;
1291 	struct ccb_scsiio *csio;
1292 
1293 	softc = (struct da_softc *)periph->softc;
1294 	csio = &done_ccb->csio;
1295 	switch (csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) {
1296 	case DA_CCB_BUFFER_IO:
1297 	{
1298 		struct bio *bp;
1299 		int    oldspl;
1300 
1301 		bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
1302 		if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1303 			int error;
1304 			int s;
1305 			int sf;
1306 
1307 			if ((csio->ccb_h.ccb_state & DA_CCB_RETRY_UA) != 0)
1308 				sf = SF_RETRY_UA;
1309 			else
1310 				sf = 0;
1311 
1312 			error = daerror(done_ccb, CAM_RETRY_SELTO, sf);
1313 			if (error == ERESTART) {
1314 				/*
1315 				 * A retry was scheuled, so
1316 				 * just return.
1317 				 */
1318 				return;
1319 			}
1320 			if (error != 0) {
1321 				struct bio *q_bp;
1322 
1323 				s = splbio();
1324 
1325 				if (error == ENXIO) {
1326 					/*
1327 					 * Catastrophic error.  Mark our pack as
1328 					 * invalid.
1329 					 */
1330 					/* XXX See if this is really a media
1331 					 *     change first.
1332 					 */
1333 					xpt_print_path(periph->path);
1334 					printf("Invalidating pack\n");
1335 					softc->flags |= DA_FLAG_PACK_INVALID;
1336 				}
1337 
1338 				/*
1339 				 * return all queued I/O with EIO, so that
1340 				 * the client can retry these I/Os in the
1341 				 * proper order should it attempt to recover.
1342 				 */
1343 				while ((q_bp = bioq_first(&softc->bio_queue))
1344 					!= NULL) {
1345 					bioq_remove(&softc->bio_queue, q_bp);
1346 					q_bp->bio_resid = q_bp->bio_bcount;
1347 					biofinish(q_bp, NULL, EIO);
1348 				}
1349 				splx(s);
1350 				bp->bio_error = error;
1351 				bp->bio_resid = bp->bio_bcount;
1352 				bp->bio_flags |= BIO_ERROR;
1353 			} else {
1354 				bp->bio_resid = csio->resid;
1355 				bp->bio_error = 0;
1356 				if (bp->bio_resid != 0) {
1357 					/* Short transfer ??? */
1358 					bp->bio_flags |= BIO_ERROR;
1359 				}
1360 			}
1361 			if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1362 				cam_release_devq(done_ccb->ccb_h.path,
1363 						 /*relsim_flags*/0,
1364 						 /*reduction*/0,
1365 						 /*timeout*/0,
1366 						 /*getcount_only*/0);
1367 		} else {
1368 			if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1369 				panic("REQ_CMP with QFRZN");
1370 			bp->bio_resid = csio->resid;
1371 			if (csio->resid > 0)
1372 				bp->bio_flags |= BIO_ERROR;
1373 		}
1374 
1375 		/*
1376 		 * Block out any asyncronous callbacks
1377 		 * while we touch the pending ccb list.
1378 		 */
1379 		oldspl = splcam();
1380 		LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
1381 		splx(oldspl);
1382 
1383 		if (softc->device_stats.busy_count == 0)
1384 			softc->flags |= DA_FLAG_WENT_IDLE;
1385 
1386 		biofinish(bp, &softc->device_stats, 0);
1387 		break;
1388 	}
1389 	case DA_CCB_PROBE:
1390 	{
1391 		struct	   scsi_read_capacity_data *rdcap;
1392 		char	   announce_buf[80];
1393 
1394 		rdcap = (struct scsi_read_capacity_data *)csio->data_ptr;
1395 
1396 		if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
1397 			struct disk_params *dp;
1398 
1399 			dasetgeom(periph, rdcap);
1400 			dp = &softc->params;
1401 			snprintf(announce_buf, sizeof(announce_buf),
1402 			        "%luMB (%u %u byte sectors: %dH %dS/T %dC)",
1403 				(unsigned long) (((u_int64_t)dp->secsize *
1404 				dp->sectors) / (1024*1024)), dp->sectors,
1405 				dp->secsize, dp->heads, dp->secs_per_track,
1406 				dp->cylinders);
1407 		} else {
1408 			int	error;
1409 
1410 			announce_buf[0] = '\0';
1411 
1412 			/*
1413 			 * Retry any UNIT ATTENTION type errors.  They
1414 			 * are expected at boot.
1415 			 */
1416 			error = daerror(done_ccb, CAM_RETRY_SELTO,
1417 					SF_RETRY_UA|SF_NO_PRINT);
1418 			if (error == ERESTART) {
1419 				/*
1420 				 * A retry was scheuled, so
1421 				 * just return.
1422 				 */
1423 				return;
1424 			} else if (error != 0) {
1425 				struct scsi_sense_data *sense;
1426 				int asc, ascq;
1427 				int sense_key, error_code;
1428 				int have_sense;
1429 				cam_status status;
1430 				struct ccb_getdev cgd;
1431 
1432 				/* Don't wedge this device's queue */
1433 				status = done_ccb->ccb_h.status;
1434 				if ((status & CAM_DEV_QFRZN) != 0)
1435 					cam_release_devq(done_ccb->ccb_h.path,
1436 							 /*relsim_flags*/0,
1437 							 /*reduction*/0,
1438 							 /*timeout*/0,
1439 							 /*getcount_only*/0);
1440 
1441 
1442 				xpt_setup_ccb(&cgd.ccb_h,
1443 					      done_ccb->ccb_h.path,
1444 					      /* priority */ 1);
1445 				cgd.ccb_h.func_code = XPT_GDEV_TYPE;
1446 				xpt_action((union ccb *)&cgd);
1447 
1448 				if (((csio->ccb_h.flags & CAM_SENSE_PHYS) != 0)
1449 				 || ((csio->ccb_h.flags & CAM_SENSE_PTR) != 0)
1450 				 || ((status & CAM_AUTOSNS_VALID) == 0))
1451 					have_sense = FALSE;
1452 				else
1453 					have_sense = TRUE;
1454 
1455 				if (have_sense) {
1456 					sense = &csio->sense_data;
1457 					scsi_extract_sense(sense, &error_code,
1458 							   &sense_key,
1459 							   &asc, &ascq);
1460 				}
1461 				/*
1462 				 * Attach to anything that claims to be a
1463 				 * direct access or optical disk device,
1464 				 * as long as it doesn't return a "Logical
1465 				 * unit not supported" (0x25) error.
1466 				 */
1467 				if ((have_sense) && (asc != 0x25)
1468 				 && (error_code == SSD_CURRENT_ERROR)) {
1469 					const char *sense_key_desc;
1470 					const char *asc_desc;
1471 
1472 					scsi_sense_desc(sense_key, asc, ascq,
1473 							&cgd.inq_data,
1474 							&sense_key_desc,
1475 							&asc_desc);
1476 					snprintf(announce_buf,
1477 					    sizeof(announce_buf),
1478 						"Attempt to query device "
1479 						"size failed: %s, %s",
1480 						sense_key_desc,
1481 						asc_desc);
1482 				} else {
1483 					if (have_sense)
1484 						scsi_sense_print(
1485 							&done_ccb->csio);
1486 					else {
1487 						xpt_print_path(periph->path);
1488 						printf("got CAM status %#x\n",
1489 						       done_ccb->ccb_h.status);
1490 					}
1491 
1492 					xpt_print_path(periph->path);
1493 					printf("fatal error, failed"
1494 					       " to attach to device\n");
1495 
1496 					/*
1497 					 * Free up resources.
1498 					 */
1499 					cam_periph_invalidate(periph);
1500 				}
1501 			}
1502 		}
1503 		free(rdcap, M_TEMP);
1504 		if (announce_buf[0] != '\0')
1505 			xpt_announce_periph(periph, announce_buf);
1506 		softc->state = DA_STATE_NORMAL;
1507 		/*
1508 		 * Since our peripheral may be invalidated by an error
1509 		 * above or an external event, we must release our CCB
1510 		 * before releasing the probe lock on the peripheral.
1511 		 * The peripheral will only go away once the last lock
1512 		 * is removed, and we need it around for the CCB release
1513 		 * operation.
1514 		 */
1515 		xpt_release_ccb(done_ccb);
1516 		cam_periph_unlock(periph);
1517 		return;
1518 	}
1519 	case DA_CCB_WAITING:
1520 	{
1521 		/* Caller will release the CCB */
1522 		wakeup(&done_ccb->ccb_h.cbfcnp);
1523 		return;
1524 	}
1525 	case DA_CCB_DUMP:
1526 		/* No-op.  We're polling */
1527 		return;
1528 	default:
1529 		break;
1530 	}
1531 	xpt_release_ccb(done_ccb);
1532 }
1533 
1534 static int
1535 daerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
1536 {
1537 	struct da_softc	  *softc;
1538 	struct cam_periph *periph;
1539 
1540 	periph = xpt_path_periph(ccb->ccb_h.path);
1541 	softc = (struct da_softc *)periph->softc;
1542 
1543 	/*
1544 	 * XXX
1545 	 * Until we have a better way of doing pack validation,
1546 	 * don't treat UAs as errors.
1547 	 */
1548 	sense_flags |= SF_RETRY_UA;
1549 	return(cam_periph_error(ccb, cam_flags, sense_flags,
1550 				&softc->saved_ccb));
1551 }
1552 
1553 static void
1554 daprevent(struct cam_periph *periph, int action)
1555 {
1556 	struct	da_softc *softc;
1557 	union	ccb *ccb;
1558 	int	error;
1559 
1560 	softc = (struct da_softc *)periph->softc;
1561 
1562 	if (((action == PR_ALLOW)
1563 	  && (softc->flags & DA_FLAG_PACK_LOCKED) == 0)
1564 	 || ((action == PR_PREVENT)
1565 	  && (softc->flags & DA_FLAG_PACK_LOCKED) != 0)) {
1566 		return;
1567 	}
1568 
1569 	ccb = cam_periph_getccb(periph, /*priority*/1);
1570 
1571 	scsi_prevent(&ccb->csio,
1572 		     /*retries*/1,
1573 		     /*cbcfp*/dadone,
1574 		     MSG_SIMPLE_Q_TAG,
1575 		     action,
1576 		     SSD_FULL_SIZE,
1577 		     5000);
1578 
1579 	error = cam_periph_runccb(ccb, /*error_routine*/NULL, CAM_RETRY_SELTO,
1580 				  SF_RETRY_UA, &softc->device_stats);
1581 
1582 	if (error == 0) {
1583 		if (action == PR_ALLOW)
1584 			softc->flags &= ~DA_FLAG_PACK_LOCKED;
1585 		else
1586 			softc->flags |= DA_FLAG_PACK_LOCKED;
1587 	}
1588 
1589 	xpt_release_ccb(ccb);
1590 }
1591 
1592 static void
1593 dasetgeom(struct cam_periph *periph, struct scsi_read_capacity_data * rdcap)
1594 {
1595 	struct ccb_calc_geometry ccg;
1596 	struct da_softc *softc;
1597 	struct disk_params *dp;
1598 
1599 	softc = (struct da_softc *)periph->softc;
1600 
1601 	dp = &softc->params;
1602 	dp->secsize = scsi_4btoul(rdcap->length);
1603 	dp->sectors = scsi_4btoul(rdcap->addr) + 1;
1604 	/*
1605 	 * Have the controller provide us with a geometry
1606 	 * for this disk.  The only time the geometry
1607 	 * matters is when we boot and the controller
1608 	 * is the only one knowledgeable enough to come
1609 	 * up with something that will make this a bootable
1610 	 * device.
1611 	 */
1612 	xpt_setup_ccb(&ccg.ccb_h, periph->path, /*priority*/1);
1613 	ccg.ccb_h.func_code = XPT_CALC_GEOMETRY;
1614 	ccg.block_size = dp->secsize;
1615 	ccg.volume_size = dp->sectors;
1616 	ccg.heads = 0;
1617 	ccg.secs_per_track = 0;
1618 	ccg.cylinders = 0;
1619 	xpt_action((union ccb*)&ccg);
1620 	dp->heads = ccg.heads;
1621 	dp->secs_per_track = ccg.secs_per_track;
1622 	dp->cylinders = ccg.cylinders;
1623 }
1624 
1625 static void
1626 dasendorderedtag(void *arg)
1627 {
1628 	struct da_softc *softc;
1629 	int s;
1630 
1631 	for (softc = SLIST_FIRST(&softc_list);
1632 	     softc != NULL;
1633 	     softc = SLIST_NEXT(softc, links)) {
1634 		s = splsoftcam();
1635 		if ((softc->ordered_tag_count == 0)
1636 		 && ((softc->flags & DA_FLAG_WENT_IDLE) == 0)) {
1637 			softc->flags |= DA_FLAG_NEED_OTAG;
1638 		}
1639 		if (softc->device_stats.busy_count > 0)
1640 			softc->flags &= ~DA_FLAG_WENT_IDLE;
1641 
1642 		softc->ordered_tag_count = 0;
1643 		splx(s);
1644 	}
1645 	/* Queue us up again */
1646 	timeout(dasendorderedtag, NULL,
1647 		(da_default_timeout * hz) / DA_ORDEREDTAG_INTERVAL);
1648 }
1649 
1650 /*
1651  * Step through all DA peripheral drivers, and if the device is still open,
1652  * sync the disk cache to physical media.
1653  */
1654 static void
1655 dashutdown(void * arg, int howto)
1656 {
1657 	struct cam_periph *periph;
1658 	struct da_softc *softc;
1659 
1660 	TAILQ_FOREACH(periph, &dadriver.units, unit_links) {
1661 		union ccb ccb;
1662 		softc = (struct da_softc *)periph->softc;
1663 
1664 		/*
1665 		 * We only sync the cache if the drive is still open, and
1666 		 * if the drive is capable of it..
1667 		 */
1668 		if (((softc->flags & DA_FLAG_OPEN) == 0)
1669 		 || (softc->quirks & DA_Q_NO_SYNC_CACHE))
1670 			continue;
1671 
1672 		xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/1);
1673 
1674 		ccb.ccb_h.ccb_state = DA_CCB_DUMP;
1675 		scsi_synchronize_cache(&ccb.csio,
1676 				       /*retries*/1,
1677 				       /*cbfcnp*/dadone,
1678 				       MSG_SIMPLE_Q_TAG,
1679 				       /*begin_lba*/0, /* whole disk */
1680 				       /*lb_count*/0,
1681 				       SSD_FULL_SIZE,
1682 				       60 * 60 * 1000);
1683 
1684 		xpt_polled_action(&ccb);
1685 
1686 		if ((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1687 			if (((ccb.ccb_h.status & CAM_STATUS_MASK) ==
1688 			     CAM_SCSI_STATUS_ERROR)
1689 			 && (ccb.csio.scsi_status == SCSI_STATUS_CHECK_COND)){
1690 				int error_code, sense_key, asc, ascq;
1691 
1692 				scsi_extract_sense(&ccb.csio.sense_data,
1693 						   &error_code, &sense_key,
1694 						   &asc, &ascq);
1695 
1696 				if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
1697 					scsi_sense_print(&ccb.csio);
1698 			} else {
1699 				xpt_print_path(periph->path);
1700 				printf("Synchronize cache failed, status "
1701 				       "== 0x%x, scsi status == 0x%x\n",
1702 				       ccb.ccb_h.status, ccb.csio.scsi_status);
1703 			}
1704 		}
1705 
1706 		if ((ccb.ccb_h.status & CAM_DEV_QFRZN) != 0)
1707 			cam_release_devq(ccb.ccb_h.path,
1708 					 /*relsim_flags*/0,
1709 					 /*reduction*/0,
1710 					 /*timeout*/0,
1711 					 /*getcount_only*/0);
1712 
1713 	}
1714 }
1715 
1716 #else /* !_KERNEL */
1717 
1718 /*
1719  * XXX This is only left out of the kernel build to silence warnings.  If,
1720  * for some reason this function is used in the kernel, the ifdefs should
1721  * be moved so it is included both in the kernel and userland.
1722  */
1723 void
1724 scsi_format_unit(struct ccb_scsiio *csio, u_int32_t retries,
1725 		 void (*cbfcnp)(struct cam_periph *, union ccb *),
1726 		 u_int8_t tag_action, u_int8_t byte2, u_int16_t ileave,
1727 		 u_int8_t *data_ptr, u_int32_t dxfer_len, u_int8_t sense_len,
1728 		 u_int32_t timeout)
1729 {
1730 	struct scsi_format_unit *scsi_cmd;
1731 
1732 	scsi_cmd = (struct scsi_format_unit *)&csio->cdb_io.cdb_bytes;
1733 	scsi_cmd->opcode = FORMAT_UNIT;
1734 	scsi_cmd->byte2 = byte2;
1735 	scsi_ulto2b(ileave, scsi_cmd->interleave);
1736 
1737 	cam_fill_csio(csio,
1738 		      retries,
1739 		      cbfcnp,
1740 		      /*flags*/ (dxfer_len > 0) ? CAM_DIR_OUT : CAM_DIR_NONE,
1741 		      tag_action,
1742 		      data_ptr,
1743 		      dxfer_len,
1744 		      sense_len,
1745 		      sizeof(*scsi_cmd),
1746 		      timeout);
1747 }
1748 
1749 #endif /* _KERNEL */
1750