fdisk, gpt - Support trim on recent kernels
[dragonfly.git] / sys / bus / cam / scsi / scsi_da.c
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: src/sys/cam/scsi/scsi_da.c,v 1.42.2.46 2003/10/21 22:18:19 thomas Exp $
29  */
30
31 #include <sys/param.h>
32
33 #ifdef _KERNEL
34
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/buf.h>
38 #include <sys/sysctl.h>
39 #include <sys/taskqueue.h>
40 #include <sys/lock.h>
41 #include <sys/conf.h>
42 #include <sys/devicestat.h>
43 #include <sys/disk.h>
44 #include <sys/dtype.h>
45 #include <sys/eventhandler.h>
46 #include <sys/malloc.h>
47 #include <sys/cons.h>
48 #include <sys/proc.h>
49
50 #include <sys/buf2.h>
51 #include <sys/thread2.h>
52
53 #endif /* _KERNEL */
54
55 #ifdef _KERNEL
56 #include <vm/pmap.h>
57 #endif
58
59 #ifndef _KERNEL
60 #include <stdio.h>
61 #include <string.h>
62 #endif /* _KERNEL */
63
64 #include <sys/camlib.h>
65 #include "../cam.h"
66 #include "../cam_ccb.h"
67 #include "../cam_extend.h"
68 #include "../cam_periph.h"
69 #include "../cam_xpt_periph.h"
70 #include "../cam_sim.h"
71
72 #include "scsi_daio.h"
73 #include "scsi_message.h"
74
75 #ifndef _KERNEL 
76 #include "scsi_da.h"
77 #endif /* !_KERNEL */
78
79 #ifdef _KERNEL
80 typedef enum {
81         DA_STATE_PROBE,
82         DA_STATE_PROBE2,
83         DA_STATE_NORMAL
84 } da_state;
85
86 typedef enum {
87         DA_FLAG_PACK_INVALID    = 0x001,
88         DA_FLAG_NEW_PACK        = 0x002,
89         DA_FLAG_PACK_LOCKED     = 0x004,
90         DA_FLAG_PACK_REMOVABLE  = 0x008,
91         DA_FLAG_TAGGED_QUEUING  = 0x010,
92         DA_FLAG_RETRY_UA        = 0x080,
93         DA_FLAG_OPEN            = 0x100,
94         DA_FLAG_SCTX_INIT       = 0x200,
95         DA_FLAG_RD_LIMIT        = 0x400,
96         DA_FLAG_WR_LIMIT        = 0x800,
97         DA_FLAG_CAN_TRIM        = 0x1000
98 } da_flags;
99
100 typedef enum {
101         DA_Q_NONE               = 0x00,
102         DA_Q_NO_SYNC_CACHE      = 0x01,
103         DA_Q_NO_6_BYTE          = 0x02,
104         DA_Q_NO_PREVENT         = 0x04
105 } da_quirks;
106
107 typedef enum {
108         DA_CCB_POLLED           = 0x00,
109         DA_CCB_PROBE            = 0x01,
110         DA_CCB_PROBE2           = 0x02,
111         DA_CCB_BUFFER_IO        = 0x03,
112         DA_CCB_WAITING          = 0x04,
113         DA_CCB_DUMP             = 0x05,
114         DA_CCB_TRIM             = 0x06,
115         DA_CCB_TYPE_MASK        = 0x0F,
116         DA_CCB_RETRY_UA         = 0x10
117 } da_ccb_state;
118
119 /* Offsets into our private area for storing information */
120 #define ccb_state       ppriv_field0
121 #define ccb_bio         ppriv_ptr1
122
123 struct disk_params {
124         u_int8_t  heads;
125         u_int32_t cylinders;
126         u_int8_t  secs_per_track;
127         u_int32_t secsize;      /* Number of bytes/sector */
128         u_int64_t sectors;      /* total number sectors */
129 };
130
131 #define TRIM_MAX_BLOCKS 8
132 #define TRIM_MAX_RANGES TRIM_MAX_BLOCKS * 64
133 struct trim_request {
134         uint8_t         data[TRIM_MAX_RANGES * 8];
135         struct bio      *bios[TRIM_MAX_RANGES];
136 };
137
138 struct da_softc {
139         struct   bio_queue_head bio_queue_rd;
140         struct   bio_queue_head bio_queue_wr;
141         struct   bio_queue_head bio_queue_trim;
142         struct   devstat device_stats;
143         SLIST_ENTRY(da_softc) links;
144         LIST_HEAD(, ccb_hdr) pending_ccbs;
145         da_state state;
146         da_flags flags; 
147         da_quirks quirks;
148         int      minimum_cmd_size;
149         int      outstanding_cmds_rd;
150         int      outstanding_cmds_wr;
151         int      trim_max_ranges;
152         int      trim_running;
153         int      trim_enabled;
154         struct   disk_params params;
155         struct   disk disk;
156         union    ccb saved_ccb;
157         struct task             sysctl_task;
158         struct sysctl_ctx_list  sysctl_ctx;
159         struct sysctl_oid       *sysctl_tree;
160         struct trim_request     trim_req;
161 };
162
163 struct da_quirk_entry {
164         struct scsi_inquiry_pattern inq_pat;
165         da_quirks quirks;
166 };
167
168 static const char quantum[] = "QUANTUM";
169 static const char microp[] = "MICROP";
170
171 static struct da_quirk_entry da_quirk_table[] =
172 {
173         /* SPI, FC devices */
174         {
175                 /*
176                  * Fujitsu M2513A MO drives.
177                  * Tested devices: M2513A2 firmware versions 1200 & 1300.
178                  * (dip switch selects whether T_DIRECT or T_OPTICAL device)
179                  * Reported by: W.Scholten <whs@xs4all.nl>
180                  */
181                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
182                 /*quirks*/ DA_Q_NO_SYNC_CACHE
183         },
184         {
185                 /* See above. */
186                 {T_OPTICAL, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
187                 /*quirks*/ DA_Q_NO_SYNC_CACHE
188         },
189         {
190                 /*
191                  * This particular Fujitsu drive doesn't like the
192                  * synchronize cache command.
193                  * Reported by: Tom Jackson <toj@gorilla.net>
194                  */
195                 {T_DIRECT, SIP_MEDIA_FIXED, "FUJITSU", "M2954*", "*"},
196                 /*quirks*/ DA_Q_NO_SYNC_CACHE
197         },
198         {
199                 /*
200                  * This drive doesn't like the synchronize cache command
201                  * either.  Reported by: Matthew Jacob <mjacob@feral.com>
202                  * in NetBSD PR kern/6027, August 24, 1998.
203                  */
204                 {T_DIRECT, SIP_MEDIA_FIXED, microp, "2217*", "*"},
205                 /*quirks*/ DA_Q_NO_SYNC_CACHE
206         },
207         {
208                 /*
209                  * This drive doesn't like the synchronize cache command
210                  * either.  Reported by: Hellmuth Michaelis (hm@kts.org)
211                  * (PR 8882).
212                  */
213                 {T_DIRECT, SIP_MEDIA_FIXED, microp, "2112*", "*"},
214                 /*quirks*/ DA_Q_NO_SYNC_CACHE
215         },
216         {
217                 /*
218                  * Doesn't like the synchronize cache command.
219                  * Reported by: Blaz Zupan <blaz@gold.amis.net>
220                  */
221                 {T_DIRECT, SIP_MEDIA_FIXED, "NEC", "D3847*", "*"},
222                 /*quirks*/ DA_Q_NO_SYNC_CACHE
223         },
224         {
225                 /*
226                  * Doesn't like the synchronize cache command.
227                  * Reported by: Blaz Zupan <blaz@gold.amis.net>
228                  */
229                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "MAVERICK 540S", "*"},
230                 /*quirks*/ DA_Q_NO_SYNC_CACHE
231         },
232         {
233                 /*
234                  * Doesn't like the synchronize cache command.
235                  */
236                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS525S", "*"},
237                 /*quirks*/ DA_Q_NO_SYNC_CACHE
238         },
239         {
240                 /*
241                  * Doesn't like the synchronize cache command.
242                  * Reported by: walter@pelissero.de
243                  */
244                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS540S", "*"},
245                 /*quirks*/ DA_Q_NO_SYNC_CACHE
246         },
247         {
248                 /*
249                  * Doesn't work correctly with 6 byte reads/writes.
250                  * Returns illegal request, and points to byte 9 of the
251                  * 6-byte CDB.
252                  * Reported by:  Adam McDougall <bsdx@spawnet.com>
253                  */
254                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 4*", "*"},
255                 /*quirks*/ DA_Q_NO_6_BYTE
256         },
257         {
258                 /* See above. */
259                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 2*", "*"},
260                 /*quirks*/ DA_Q_NO_6_BYTE
261         },
262         {
263                 /*
264                  * Doesn't like the synchronize cache command.
265                  * Reported by: walter@pelissero.de
266                  */
267                 {T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CP3500*", "*"},
268                 /*quirks*/ DA_Q_NO_SYNC_CACHE
269         },
270         {
271                 /*
272                  * The CISS RAID controllers do not support SYNC_CACHE
273                  */
274                 {T_DIRECT, SIP_MEDIA_FIXED, "COMPAQ", "RAID*", "*"},
275                 /*quirks*/ DA_Q_NO_SYNC_CACHE
276         },
277         {
278                 /*
279                  * The same goes for the mly(4) controllers
280                  */
281                 {T_DIRECT, SIP_MEDIA_FIXED, "MLY*", "*", "MYLX"},
282                 /*quirks*/ DA_Q_NO_SYNC_CACHE
283         },
284         /*
285          * USB mass storage devices supported by umass(4)
286          *
287          * NOTE: USB attachments automatically set DA_Q_NO_SYNC_CACHE so
288          *       it does not have to be specified here.
289          */
290         {
291                 /*
292                  * Creative Nomad MUVO mp3 player (USB)
293                  * PR: kern/53094
294                  */
295                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "NOMAD_MUVO", "*"},
296                 /*quirks*/ DA_Q_NO_PREVENT
297         },
298         {
299                 /*
300                  * Sigmatel USB Flash MP3 Player
301                  * PR: kern/57046
302                  */
303                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "SigmaTel", "MSCN", "*"},
304                 /*quirks*/ DA_Q_NO_PREVENT
305         },
306         {
307                 /*
308                  * SEAGRAND NP-900 MP3 Player
309                  * PR: kern/64563
310                  */
311                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "SEAGRAND", "NP-900*", "*"},
312                 /*quirks*/ DA_Q_NO_PREVENT
313         },
314         {
315                 /*
316                  * Creative MUVO Slim mp3 player (USB)
317                  * PR: usb/86131
318                  */
319                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "MuVo Slim",
320                 "*"}, /*quirks*/ DA_Q_NO_PREVENT
321         },
322         {
323                 /*
324                  * Philips USB Key Audio KEY013
325                  * PR: usb/68412
326                  */
327                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "PHILIPS", "Key*", "*"},
328                 /*quirks*/ DA_Q_NO_PREVENT
329         },
330 };
331
332 static  d_open_t        daopen;
333 static  d_close_t       daclose;
334 static  d_strategy_t    dastrategy;
335 static  d_dump_t        dadump;
336 static  d_ioctl_t       daioctl;
337 static  periph_init_t   dainit;
338 static  void            daasync(void *callback_arg, u_int32_t code,
339                                 struct cam_path *path, void *arg);
340 static  int             dacmdsizesysctl(SYSCTL_HANDLER_ARGS);
341 static  periph_ctor_t   daregister;
342 static  periph_dtor_t   dacleanup;
343 static  periph_start_t  dastart;
344 static  periph_oninv_t  daoninvalidate;
345 static  void            dadone(struct cam_periph *periph,
346                                union ccb *done_ccb);
347 static  int             daerror(union ccb *ccb, u_int32_t cam_flags,
348                                 u_int32_t sense_flags);
349 static void             daprevent(struct cam_periph *periph, int action);
350 static int              dagetcapacity(struct cam_periph *periph);
351 static int              dacheckmedia(struct cam_periph *periph);
352 static void             dasetgeom(struct cam_periph *periph, uint32_t block_len,
353                                   uint64_t maxsector);
354 static void             daflushbioq(struct bio_queue_head *bioq, int error);
355 static void             dashutdown(void *arg, int howto);
356
357 #ifndef DA_DEFAULT_TIMEOUT
358 #define DA_DEFAULT_TIMEOUT 60   /* Timeout in seconds */
359 #endif
360
361 #ifndef DA_DEFAULT_RETRY
362 #define DA_DEFAULT_RETRY        4
363 #endif
364
365 static int da_retry_count = DA_DEFAULT_RETRY;
366 static int da_default_timeout = DA_DEFAULT_TIMEOUT;
367
368 SYSCTL_NODE(_kern_cam, OID_AUTO, da, CTLFLAG_RD, 0,
369             "CAM Direct Access Disk driver");
370 SYSCTL_INT(_kern_cam_da, OID_AUTO, retry_count, CTLFLAG_RW,
371            &da_retry_count, 0, "Normal I/O retry count");
372 TUNABLE_INT("kern.cam.da.retry_count", &da_retry_count);
373 SYSCTL_INT(_kern_cam_da, OID_AUTO, default_timeout, CTLFLAG_RW,
374            &da_default_timeout, 0, "Normal I/O timeout (in seconds)");
375 TUNABLE_INT("kern.cam.da.default_timeout", &da_default_timeout);
376
377 static struct periph_driver dadriver =
378 {
379         dainit, "da",
380         TAILQ_HEAD_INITIALIZER(dadriver.units), /* generation */ 0
381 };
382
383 PERIPHDRIVER_DECLARE(da, dadriver);
384
385 static struct dev_ops da_ops = {
386         { "da", 0, D_DISK | D_MPSAFE },
387         .d_open =       daopen,
388         .d_close =      daclose,
389         .d_read =       physread,
390         .d_write =      physwrite,
391         .d_strategy =   dastrategy,
392         .d_dump =       dadump,
393         .d_ioctl =      daioctl
394 };
395
396 static struct extend_array *daperiphs;
397
398 MALLOC_DEFINE(M_SCSIDA, "scsi_da", "scsi_da buffers");
399
400 static int
401 daioctl(struct dev_ioctl_args *ap)
402 {       
403         int unit;
404         int error = 0;  
405         struct buf *bp;         
406         struct cam_periph *periph;
407         int byte_count;
408
409         off_t *del_num = (off_t*)ap->a_data;
410         off_t bytes_left;
411         off_t bytes_start;              
412
413         cdev_t dev = ap->a_head.a_dev;
414
415
416         unit = dkunit(dev);
417         periph = cam_extend_get(daperiphs, unit);
418         if (periph == NULL)
419                 return(ENXIO);
420         
421         switch (ap->a_cmd) {
422         case DAIOCTRIM:
423         {
424
425                 bytes_left = del_num[1];
426                 bytes_start = del_num[0];
427
428                 /* TRIM occurs on 512-byte sectors. */
429                 KKASSERT((bytes_left % 512) == 0);
430                 KKASSERT((bytes_start% 512) == 0);
431
432                 
433                 /* Break TRIM up into int-sized commands because of b_bcount */
434                 while(bytes_left) {
435
436                         /* 
437                          * Rather than than squezing out more blocks in b_bcount 
438                          * and having to break up the TRIM request in da_start(),
439                          * we ensure we can always TRIM this many bytes with one 
440                          * TRIM command (this happens if the device only 
441                          * supports one TRIM block). 
442                          *  
443                          * With min TRIM blksize of 1, TRIM command free
444                          * 4194240 blks(64*65535): each LBA range can address 
445                          * 65535 blks and there 64 such ranges in a 512-byte 
446                          * block. And, 4194240 * 512 = 0x7FFF8000
447                          * 
448                          */
449                         byte_count = MIN(bytes_left,0x7FFF8000);
450                         bp = getnewbuf(0, 0, 0, 1);
451                 
452                         bp->b_cmd = BUF_CMD_FREEBLKS;
453                         bp->b_bio1.bio_offset = bytes_start;
454                         bp->b_bcount = byte_count;
455                         bp->b_bio1.bio_flags |= BIO_SYNC;
456                         bp->b_bio1.bio_done = biodone_sync;
457                 
458                         dev_dstrategy(ap->a_head.a_dev, &bp->b_bio1);
459                 
460                         if (biowait(&bp->b_bio1, "TRIM")) {
461                                 kprintf("Error:%d\n", bp->b_error);
462                                 brelse(bp);
463                                 return(bp->b_error ? bp->b_error : EIO);
464                         }
465                         brelse(bp);
466                         bytes_left -= byte_count;
467                         bytes_start += byte_count;      
468                 }
469                 break;
470         }
471         default:
472                 return(EINVAL);
473         }       
474         
475         return(error);
476 }
477
478 static int
479 daopen(struct dev_open_args *ap)
480 {
481         cdev_t dev = ap->a_head.a_dev;
482         struct cam_periph *periph;
483         struct da_softc *softc;
484         struct disk_info info;
485         int unit;
486         int error;
487
488         unit = dkunit(dev);
489         periph = cam_extend_get(daperiphs, unit);
490         if (periph == NULL) {
491                 return (ENXIO); 
492         }
493
494         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
495                 return(ENXIO);
496         }
497
498         cam_periph_lock(periph);
499         if ((error = cam_periph_hold(periph, PCATCH)) != 0) {
500                 cam_periph_unlock(periph);
501                 cam_periph_release(periph);
502                 return (error);
503         }
504
505         unit = periph->unit_number;
506         softc = (struct da_softc *)periph->softc;
507
508         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
509             ("daopen: dev=%s (unit %d)\n", devtoname(dev),
510              unit));
511
512         if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
513                 /* Invalidate our pack information. */
514                 disk_invalidate(&softc->disk);
515                 softc->flags &= ~DA_FLAG_PACK_INVALID;
516         }
517
518         error = dacheckmedia(periph);
519         softc->flags |= DA_FLAG_OPEN;
520
521         if (error == 0) {
522                 struct ccb_getdev cgd;
523
524                 /* Build disk information structure */
525                 bzero(&info, sizeof(info));
526                 info.d_type = DTYPE_SCSI;
527
528                 /*
529                  * Grab the inquiry data to get the vendor and product names.
530                  * Put them in the typename and packname for the label.
531                  */
532                 xpt_setup_ccb(&cgd.ccb_h, periph->path, /*priority*/ 1);
533                 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
534                 xpt_action((union ccb *)&cgd);
535
536                 /*
537                  * Check to see whether or not the blocksize is set yet.
538                  * If it isn't, set it and then clear the blocksize
539                  * unavailable flag for the device statistics.
540                  */
541                 if ((softc->device_stats.flags & DEVSTAT_BS_UNAVAILABLE) != 0){
542                         softc->device_stats.block_size = softc->params.secsize;
543                         softc->device_stats.flags &= ~DEVSTAT_BS_UNAVAILABLE;
544                 }
545         }
546         
547         if (error == 0) {
548                 if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0 &&
549                     (softc->quirks & DA_Q_NO_PREVENT) == 0)
550                         daprevent(periph, PR_PREVENT);
551         } else {
552                 softc->flags &= ~DA_FLAG_OPEN;
553                 cam_periph_release(periph);
554         }
555         cam_periph_unhold(periph, 1);
556         return (error);
557 }
558
559 static int
560 daclose(struct dev_close_args *ap)
561 {
562         cdev_t dev = ap->a_head.a_dev;
563         struct  cam_periph *periph;
564         struct  da_softc *softc;
565         int     unit;
566         int     error;
567
568         unit = dkunit(dev);
569         periph = cam_extend_get(daperiphs, unit);
570         if (periph == NULL)
571                 return (ENXIO); 
572
573         cam_periph_lock(periph);
574         if ((error = cam_periph_hold(periph, 0)) != 0) {
575                 cam_periph_unlock(periph);
576                 cam_periph_release(periph);
577                 return (error);
578         }
579
580         softc = (struct da_softc *)periph->softc;
581
582         if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
583                 union   ccb *ccb;
584
585                 ccb = cam_periph_getccb(periph, /*priority*/1);
586                 ccb->ccb_h.ccb_state = DA_CCB_POLLED;
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(periph->path, "Synchronize cache "
615                                     "failed, status == 0x%x, scsi status == "
616                                     "0x%x\n", ccb->csio.ccb_h.status,
617                                     ccb->csio.scsi_status);
618                         }
619                 }
620
621                 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
622                         cam_release_devq(ccb->ccb_h.path,
623                                          /*relsim_flags*/0,
624                                          /*reduction*/0,
625                                          /*timeout*/0,
626                                          /*getcount_only*/0);
627
628                 xpt_release_ccb(ccb);
629
630         }
631
632         if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0) {
633                 if ((softc->quirks & DA_Q_NO_PREVENT) == 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         /*
644          * Don't compound any ref counting software bugs with more.
645          */
646         if (softc->flags & DA_FLAG_OPEN) {
647                 softc->flags &= ~DA_FLAG_OPEN;
648                 cam_periph_release(periph);
649         } else {
650                 xpt_print(periph->path,
651                           "daclose() called on an already closed device!\n");
652         }
653         cam_periph_unhold(periph, 1);
654         return (0);     
655 }
656
657 /*
658  * Actually translate the requested transfer into one the physical driver
659  * can understand.  The transfer is described by a buf and will include
660  * only one physical transfer.
661  */
662 static int
663 dastrategy(struct dev_strategy_args *ap)
664 {
665         cdev_t dev = ap->a_head.a_dev;
666         struct bio *bio = ap->a_bio;
667         struct buf *bp = bio->bio_buf;
668         struct cam_periph *periph;
669         struct da_softc *softc;
670         u_int  unit;
671         
672         unit = dkunit(dev);
673         periph = cam_extend_get(daperiphs, unit);
674         if (periph == NULL) {
675                 bp->b_error = ENXIO;
676                 goto bad;               
677         }
678         softc = (struct da_softc *)periph->softc;
679
680         cam_periph_lock(periph);
681
682 #if 0
683         /*
684          * check it's not too big a transfer for our adapter
685          */
686         scsi_minphys(bp, &sd_switch);
687 #endif
688
689         /*
690          * Mask interrupts so that the pack cannot be invalidated until
691          * after we are in the queue.  Otherwise, we might not properly
692          * clean up one of the buffers.
693          */
694         
695         /*
696          * If the device has been made invalid, error out
697          */
698         if ((softc->flags & DA_FLAG_PACK_INVALID)) {
699                 cam_periph_unlock(periph);
700                 bp->b_error = ENXIO;
701                 goto bad;
702         }
703         
704         /*
705          * Place it in the queue of disk activities for this disk
706          */
707         if (bp->b_cmd == BUF_CMD_WRITE || bp->b_cmd == BUF_CMD_FLUSH)
708                 bioqdisksort(&softc->bio_queue_wr, bio);
709         else if (bp->b_cmd == BUF_CMD_FREEBLKS) 
710                 bioqdisksort(&softc->bio_queue_trim, bio);
711         else
712                 bioqdisksort(&softc->bio_queue_rd, bio);
713         
714         /*
715          * Schedule ourselves for performing the work.
716          */
717         xpt_schedule(periph, /* XXX priority */1);
718         cam_periph_unlock(periph);
719
720         return(0);
721 bad:
722         bp->b_flags |= B_ERROR;
723
724         /*
725          * Correctly set the buf to indicate a completed xfer
726          */
727         bp->b_resid = bp->b_bcount;
728         biodone(bio);
729         return(0);
730 }
731
732 static int
733 dadump(struct dev_dump_args *ap)
734 {
735         cdev_t dev = ap->a_head.a_dev;
736         struct      cam_periph *periph;
737         struct      da_softc *softc;
738         u_int       unit;
739         u_int32_t   secsize;
740         struct      ccb_scsiio csio;
741
742         unit = dkunit(dev);
743         periph = cam_extend_get(daperiphs, unit);
744         if (periph == NULL)
745                 return (ENXIO);
746
747         softc = (struct da_softc *)periph->softc;
748         cam_periph_lock(periph);
749         secsize = softc->params.secsize; /* XXX: or ap->a_secsize? */
750
751         if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
752                 cam_periph_unlock(periph);
753                 return (ENXIO);
754         }
755
756         /*
757          * because length == 0 means we are supposed to flush cache, we only
758          * try to write something if length > 0.
759          */
760         if (ap->a_length > 0) {
761                 xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
762                 csio.ccb_h.flags |= CAM_POLLED;
763                 csio.ccb_h.ccb_state = DA_CCB_DUMP;
764                 scsi_read_write(&csio,
765                                 /*retries*/1,
766                                 dadone,
767                                 MSG_ORDERED_Q_TAG,
768                                 /*read*/FALSE,
769                                 /*byte2*/0,
770                                 /*minimum_cmd_size*/ softc->minimum_cmd_size,
771                                 ap->a_offset / secsize,
772                                 ap->a_length / secsize,
773                                 /*data_ptr*/(u_int8_t *) ap->a_virtual,
774                                 /*dxfer_len*/ap->a_length,
775                                 /*sense_len*/SSD_FULL_SIZE,
776                                 DA_DEFAULT_TIMEOUT * 1000);             
777                 xpt_polled_action((union ccb *)&csio);
778
779                 if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
780                         kprintf("Aborting dump due to I/O error.\n");
781                         if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
782                              CAM_SCSI_STATUS_ERROR)
783                                 scsi_sense_print(&csio);
784                         else
785                                 kprintf("status == 0x%x, scsi status == 0x%x\n",
786                                        csio.ccb_h.status, csio.scsi_status);
787                         return(EIO);
788                 }
789                 cam_periph_unlock(periph);
790                 return 0;
791         }
792
793         /*
794          * Sync the disk cache contents to the physical media.
795          */
796         if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
797
798                 xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
799                 csio.ccb_h.ccb_state = DA_CCB_DUMP;
800                 scsi_synchronize_cache(&csio,
801                                        /*retries*/1,
802                                        /*cbfcnp*/dadone,
803                                        MSG_SIMPLE_Q_TAG,
804                                        /*begin_lba*/0,/* Cover the whole disk */
805                                        /*lb_count*/0,
806                                        SSD_FULL_SIZE,
807                                        5 * 60 * 1000);
808                 xpt_polled_action((union ccb *)&csio);
809
810                 if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
811                         if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
812                              CAM_SCSI_STATUS_ERROR) {
813                                 int asc, ascq;
814                                 int sense_key, error_code;
815
816                                 scsi_extract_sense(&csio.sense_data,
817                                                    &error_code,
818                                                    &sense_key, 
819                                                    &asc, &ascq);
820                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
821                                         scsi_sense_print(&csio);
822                         } else {
823                                 xpt_print(periph->path, "Synchronize cache "
824                                     "failed, status == 0x%x, scsi status == "
825                                     "0x%x\n", csio.ccb_h.status,
826                                     csio.scsi_status);
827                         }
828                 }
829         }
830         cam_periph_unlock(periph);
831         return (0);
832 }
833
834 static void
835 dainit(void)
836 {
837         cam_status status;
838
839         /*
840          * Create our extend array for storing the devices we attach to.
841          */
842         daperiphs = cam_extend_new();
843         if (daperiphs == NULL) {
844                 kprintf("da: Failed to alloc extend array!\n");
845                 return;
846         }
847
848         /*
849          * Install a global async callback.  This callback will
850          * receive async callbacks like "new device found".
851          */
852         status = xpt_register_async(AC_FOUND_DEVICE, daasync, NULL, NULL);
853
854         if (status != CAM_REQ_CMP) {
855                 kprintf("da: Failed to attach master async callback "
856                        "due to status 0x%x!\n", status);
857         } else {
858                 /* Register our shutdown event handler */
859                 if ((EVENTHANDLER_REGISTER(shutdown_post_sync, dashutdown, 
860                                            NULL, SHUTDOWN_PRI_SECOND)) == NULL)
861                         kprintf("%s: shutdown event registration failed!\n",
862                             __func__);
863         }
864 }
865
866 static void
867 daoninvalidate(struct cam_periph *periph)
868 {
869         struct da_softc *softc;
870
871         softc = (struct da_softc *)periph->softc;
872
873         /*
874          * De-register any async callbacks.
875          */
876         xpt_register_async(0, daasync, periph, periph->path);
877
878         softc->flags |= DA_FLAG_PACK_INVALID;
879
880         /*
881          * Return all queued I/O with ENXIO.
882          * XXX Handle any transactions queued to the card
883          *     with XPT_ABORT_CCB.
884          */
885         daflushbioq(&softc->bio_queue_trim, ENXIO);
886         daflushbioq(&softc->bio_queue_wr, ENXIO);
887         daflushbioq(&softc->bio_queue_rd, ENXIO);
888         xpt_print(periph->path, "lost device\n");
889 }
890
891 static void
892 daflushbioq(struct bio_queue_head *bioq, int error)
893 {
894         struct bio *q_bio;
895         struct buf *q_bp;
896
897         while ((q_bio = bioq_first(bioq)) != NULL){
898                 bioq_remove(bioq, q_bio);
899                 q_bp = q_bio->bio_buf;
900                 q_bp->b_resid = q_bp->b_bcount;
901                 q_bp->b_error = error;
902                 q_bp->b_flags |= B_ERROR;
903                 biodone(q_bio);
904         }
905 }
906
907 static void
908 dacleanup(struct cam_periph *periph)
909 {
910         struct da_softc *softc;
911
912         softc = (struct da_softc *)periph->softc;
913
914         devstat_remove_entry(&softc->device_stats);
915         cam_extend_release(daperiphs, periph->unit_number);
916         xpt_print(periph->path, "removing device entry\n");
917         /*
918          * If we can't free the sysctl tree, oh well...
919          */
920         if ((softc->flags & DA_FLAG_SCTX_INIT) != 0
921             && sysctl_ctx_free(&softc->sysctl_ctx) != 0) {
922                 xpt_print(periph->path, "can't remove sysctl context\n");
923         }
924         periph->softc = NULL;
925         if (softc->disk.d_rawdev) {
926                 cam_periph_unlock(periph);
927                 disk_destroy(&softc->disk);
928                 cam_periph_lock(periph);
929         }
930
931         kfree(softc, M_DEVBUF);
932 }
933
934 static void
935 daasync(void *callback_arg, u_int32_t code,
936         struct cam_path *path, void *arg)
937 {
938         struct cam_periph *periph;
939
940         periph = (struct cam_periph *)callback_arg;
941
942         switch (code) {
943         case AC_FOUND_DEVICE:
944         {
945                 struct ccb_getdev *cgd;
946                 cam_status status;
947  
948                 cgd = (struct ccb_getdev *)arg;
949                 if (cgd == NULL)
950                         break;
951
952                 if (SID_TYPE(&cgd->inq_data) != T_DIRECT
953                     && SID_TYPE(&cgd->inq_data) != T_RBC
954                     && SID_TYPE(&cgd->inq_data) != T_OPTICAL)
955                         break;
956
957                 /*
958                  * Don't complain if a valid peripheral is already attached.
959                  */
960                 periph = cam_periph_find(cgd->ccb_h.path, "da");
961                 if (periph && (periph->flags & CAM_PERIPH_INVALID) == 0)
962                         break;
963
964                 /*
965                  * Allocate a peripheral instance for
966                  * this device and start the probe
967                  * process.
968                  */
969                 status = cam_periph_alloc(daregister, daoninvalidate,
970                                           dacleanup, dastart,
971                                           "da", CAM_PERIPH_BIO,
972                                           cgd->ccb_h.path, daasync,
973                                           AC_FOUND_DEVICE, cgd);
974
975                 if (status != CAM_REQ_CMP && status != CAM_REQ_INPROG) {
976                         kprintf("%s: Unable to attach to new device "
977                             "due to status 0x%x\n", __func__, status);
978                 }
979                 break;
980         }
981         case AC_SENT_BDR:
982         case AC_BUS_RESET:
983         {
984                 struct da_softc *softc;
985                 struct ccb_hdr *ccbh;
986
987                 softc = (struct da_softc *)periph->softc;
988                 /*
989                  * Don't fail on the expected unit attention
990                  * that will occur.
991                  */
992                 softc->flags |= DA_FLAG_RETRY_UA;
993                 LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le)
994                         ccbh->ccb_state |= DA_CCB_RETRY_UA;
995                 /* FALLTHROUGH*/
996         }
997         default:
998                 cam_periph_async(periph, code, path, arg);
999                 break;
1000         }
1001 }
1002
1003 static void
1004 dasysctlinit(void *context, int pending)
1005 {
1006         struct cam_periph *periph;
1007         struct da_softc *softc;
1008         char tmpstr[80], tmpstr2[80];
1009
1010         periph = (struct cam_periph *)context;
1011         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
1012                 return;
1013         }
1014
1015         softc = (struct da_softc *)periph->softc;
1016         ksnprintf(tmpstr, sizeof(tmpstr),
1017                   "CAM DA unit %d", periph->unit_number);
1018         ksnprintf(tmpstr2, sizeof(tmpstr2),
1019                   "%d", periph->unit_number);
1020
1021         sysctl_ctx_free(&softc->sysctl_ctx);
1022         sysctl_ctx_init(&softc->sysctl_ctx);
1023         softc->flags |= DA_FLAG_SCTX_INIT;
1024         softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
1025                 SYSCTL_STATIC_CHILDREN(_kern_cam_da), OID_AUTO, tmpstr2,
1026                 CTLFLAG_RD, 0, tmpstr);
1027         if (softc->sysctl_tree == NULL) {
1028                 kprintf("%s: unable to allocate sysctl tree\n", __func__);
1029                 cam_periph_release(periph);
1030                 return;
1031         }
1032
1033         /*
1034          * Now register the sysctl handler, so the user can the value on
1035          * the fly.
1036          */
1037         SYSCTL_ADD_PROC(&softc->sysctl_ctx,SYSCTL_CHILDREN(softc->sysctl_tree),
1038                 OID_AUTO, "minimum_cmd_size", CTLTYPE_INT | CTLFLAG_RW,
1039                 &softc->minimum_cmd_size, 0, dacmdsizesysctl, "I",
1040                 "Minimum CDB size");
1041
1042         /* Only create the option if the device supports TRIM */
1043         if (softc->disk.d_info.d_trimflag) {
1044                 SYSCTL_ADD_INT(&softc->sysctl_ctx, 
1045                     SYSCTL_CHILDREN(softc->sysctl_tree),
1046                     OID_AUTO,
1047                     "trim_enabled",
1048                     CTLFLAG_RW,
1049                     &softc->trim_enabled,
1050                     0,
1051                     "Enable TRIM for this device (SSD))");
1052         }
1053
1054         cam_periph_release(periph);
1055 }
1056
1057 static int
1058 dacmdsizesysctl(SYSCTL_HANDLER_ARGS)
1059 {
1060         int error, value;
1061
1062         value = *(int *)arg1;
1063
1064         error = sysctl_handle_int(oidp, &value, 0, req);
1065
1066         if ((error != 0)
1067          || (req->newptr == NULL))
1068                 return (error);
1069
1070         /*
1071          * Acceptable values here are 6, 10 or 12, or 16.
1072          */
1073         if (value < 6)
1074                 value = 6;
1075         else if ((value > 6)
1076               && (value <= 10))
1077                 value = 10;
1078         else if ((value > 10)
1079               && (value <= 12))
1080                 value = 12;
1081         else if (value > 12)
1082                 value = 16;
1083
1084         *(int *)arg1 = value;
1085
1086         return (0);
1087 }
1088
1089 static cam_status
1090 daregister(struct cam_periph *periph, void *arg)
1091 {
1092         struct da_softc *softc;
1093         struct ccb_pathinq cpi;
1094         struct ccb_getdev *cgd;
1095         char tmpstr[80];
1096         caddr_t match;
1097
1098         cgd = (struct ccb_getdev *)arg;
1099         if (periph == NULL) {
1100                 kprintf("%s: periph was NULL!!\n", __func__);
1101                 return(CAM_REQ_CMP_ERR);
1102         }
1103
1104         if (cgd == NULL) {
1105                 kprintf("%s: no getdev CCB, can't register device\n",
1106                     __func__);
1107                 return(CAM_REQ_CMP_ERR);
1108         }
1109
1110         softc = kmalloc(sizeof(*softc), M_DEVBUF, M_INTWAIT | M_ZERO);
1111         sysctl_ctx_init(&softc->sysctl_ctx);
1112         LIST_INIT(&softc->pending_ccbs);
1113         softc->state = DA_STATE_PROBE;
1114         bioq_init(&softc->bio_queue_trim);
1115         bioq_init(&softc->bio_queue_rd);
1116         bioq_init(&softc->bio_queue_wr);
1117         if (SID_IS_REMOVABLE(&cgd->inq_data))
1118                 softc->flags |= DA_FLAG_PACK_REMOVABLE;
1119         if ((cgd->inq_data.flags & SID_CmdQue) != 0)
1120                 softc->flags |= DA_FLAG_TAGGED_QUEUING;
1121
1122         /* Used to get TRIM status from AHCI driver */
1123         if (cgd->inq_data.vendor_specific1[0] == 1) {
1124                 /*
1125                  * max number of lba ranges an SSD can handle in a single
1126                  * TRIM command. vendor_specific1[1] is the num of 512-byte 
1127                  * blocks the SSD reports that can be passed in a TRIM cmd. 
1128                  */
1129                 softc->trim_max_ranges =
1130                    min(cgd->inq_data.vendor_specific1[1] * 64, TRIM_MAX_RANGES);
1131         }
1132
1133         periph->softc = softc;
1134         
1135         cam_extend_set(daperiphs, periph->unit_number, periph);
1136
1137         /*
1138          * See if this device has any quirks.
1139          */
1140         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1141                                (caddr_t)da_quirk_table,
1142                                NELEM(da_quirk_table),
1143                                sizeof(*da_quirk_table), scsi_inquiry_match);
1144
1145         if (match != NULL)
1146                 softc->quirks = ((struct da_quirk_entry *)match)->quirks;
1147         else
1148                 softc->quirks = DA_Q_NONE;
1149
1150         /*
1151          * Unconditionally disable the synchronize cache command for
1152          * usb attachments.  It's just impossible to determine if the
1153          * device supports it or not and if it doesn't the port can
1154          * brick.
1155          */
1156         if (strncmp(periph->sim->sim_name, "umass", 4) == 0) {
1157                 softc->quirks |= DA_Q_NO_SYNC_CACHE;
1158         }
1159
1160         TASK_INIT(&softc->sysctl_task, 0, dasysctlinit, periph);
1161
1162         /* Check if the SIM does not want 6 byte commands */
1163         bzero(&cpi, sizeof(cpi));
1164         xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
1165         cpi.ccb_h.func_code = XPT_PATH_INQ;
1166         xpt_action((union ccb *)&cpi);
1167         if (cpi.ccb_h.status == CAM_REQ_CMP && (cpi.hba_misc & PIM_NO_6_BYTE))
1168                 softc->quirks |= DA_Q_NO_6_BYTE;
1169
1170         /*
1171          * RBC devices don't have to support READ(6), only READ(10).
1172          */
1173         if (softc->quirks & DA_Q_NO_6_BYTE || SID_TYPE(&cgd->inq_data) == T_RBC)
1174                 softc->minimum_cmd_size = 10;
1175         else
1176                 softc->minimum_cmd_size = 6;
1177
1178         /*
1179          * Load the user's default, if any.
1180          */
1181         ksnprintf(tmpstr, sizeof(tmpstr), "kern.cam.da.%d.minimum_cmd_size",
1182                  periph->unit_number);
1183         TUNABLE_INT_FETCH(tmpstr, &softc->minimum_cmd_size);
1184
1185         /*
1186          * 6, 10, 12, and 16 are the currently permissible values.
1187          */
1188         if (softc->minimum_cmd_size < 6)
1189                 softc->minimum_cmd_size = 6;
1190         else if ((softc->minimum_cmd_size > 6)
1191               && (softc->minimum_cmd_size <= 10))
1192                 softc->minimum_cmd_size = 10;
1193         else if ((softc->minimum_cmd_size > 10)
1194               && (softc->minimum_cmd_size <= 12))
1195                 softc->minimum_cmd_size = 12;
1196         else if (softc->minimum_cmd_size > 12)
1197                 softc->minimum_cmd_size = 16;
1198
1199         /*
1200          * The DA driver supports a blocksize, but
1201          * we don't know the blocksize until we do 
1202          * a read capacity.  So, set a flag to
1203          * indicate that the blocksize is 
1204          * unavailable right now.  We'll clear the
1205          * flag as soon as we've done a read capacity.
1206          */
1207         devstat_add_entry(&softc->device_stats, "da", 
1208                           periph->unit_number, 0,
1209                           DEVSTAT_BS_UNAVAILABLE,
1210                           SID_TYPE(&cgd->inq_data) | DEVSTAT_TYPE_IF_SCSI,
1211                           DEVSTAT_PRIORITY_DISK);
1212
1213         /*
1214          * Register this media as a disk
1215          */
1216         CAM_SIM_UNLOCK(periph->sim);
1217         disk_create(periph->unit_number, &softc->disk, &da_ops);
1218         if (cpi.maxio == 0 || cpi.maxio > MAXPHYS)
1219                 softc->disk.d_rawdev->si_iosize_max = MAXPHYS;
1220         else
1221                 softc->disk.d_rawdev->si_iosize_max = cpi.maxio;
1222         if (bootverbose) {
1223                 kprintf("%s%d: si_iosize_max:%d\n",
1224                     periph->periph_name,
1225                     periph->unit_number,
1226                     softc->disk.d_rawdev->si_iosize_max);
1227         }
1228         CAM_SIM_LOCK(periph->sim);
1229
1230         /*
1231          * Add async callbacks for bus reset and
1232          * bus device reset calls.  I don't bother
1233          * checking if this fails as, in most cases,
1234          * the system will function just fine without
1235          * them and the only alternative would be to
1236          * not attach the device on failure.
1237          */
1238         xpt_register_async(AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE,
1239                            daasync, periph, periph->path);
1240
1241         /*
1242          * Take an exclusive refcount on the periph while dastart is called
1243          * to finish the probe.  The reference will be dropped in dadone at
1244          * the end of probe.
1245          */
1246         cam_periph_hold(periph, 0);
1247         xpt_schedule(periph, /*priority*/5);
1248
1249         return(CAM_REQ_CMP);
1250 }
1251
1252 static void
1253 dastart(struct cam_periph *periph, union ccb *start_ccb)
1254 {
1255         struct da_softc *softc;
1256
1257         softc = (struct da_softc *)periph->softc;
1258
1259         switch (softc->state) {
1260         case DA_STATE_NORMAL:
1261         {
1262                 /* Pull a buffer from the queue and get going on it */          
1263                 struct bio *bio;
1264                 struct bio *bio_rd;
1265                 struct bio *bio_wr;
1266                 struct buf *bp;
1267                 u_int8_t tag_code;
1268                 int limit;
1269
1270                 /*
1271                  * See if there is a buf with work for us to do..
1272                  */
1273                 bio_rd = bioq_first(&softc->bio_queue_rd);
1274                 bio_wr = bioq_first(&softc->bio_queue_wr);
1275
1276                 if (periph->immediate_priority <= periph->pinfo.priority) {
1277                         CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1278                                         ("queuing for immediate ccb\n"));
1279                         start_ccb->ccb_h.ccb_state = DA_CCB_WAITING;
1280                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1281                                           periph_links.sle);
1282                         periph->immediate_priority = CAM_PRIORITY_NONE;
1283                         wakeup(&periph->ccb_list);
1284                         if (bio_rd || bio_wr) {
1285                                 /*
1286                                  * Have more work to do, so ensure we stay
1287                                  * scheduled
1288                                  */
1289                                 xpt_schedule(periph, /* XXX priority */1);
1290                         }
1291                         break;
1292                 }
1293
1294                 /* Run the trim command if not already running */
1295                 if (!softc->trim_running &&
1296                    (bio = bioq_first(&softc->bio_queue_trim)) != NULL) {
1297                         struct trim_request *req = &softc->trim_req;
1298                         struct bio *bio1;
1299                         int bps = 0, ranges = 0;
1300
1301                         softc->trim_running = 1;
1302                         bzero(req, sizeof(*req));
1303                         bio1 = bio;
1304                         while (1) {
1305                                 uint64_t lba;
1306                                 int count;
1307
1308                                 bp = bio1->bio_buf;
1309                                 count = bp->b_bcount / softc->params.secsize;
1310                                 lba = bio1->bio_offset/softc->params.secsize;
1311
1312                                 bioq_remove(&softc->bio_queue_trim, bio1);
1313                                 while (count > 0) {
1314                                         int c = min(count, 0xffff);
1315                                         int off = ranges * 8;
1316
1317                                         req->data[off + 0] = lba & 0xff;
1318                                         req->data[off + 1] = (lba >> 8) & 0xff;
1319                                         req->data[off + 2] = (lba >> 16) & 0xff;
1320                                         req->data[off + 3] = (lba >> 24) & 0xff;
1321                                         req->data[off + 4] = (lba >> 32) & 0xff;
1322                                         req->data[off + 5] = (lba >> 40) & 0xff;
1323                                         req->data[off + 6] = c & 0xff;
1324                                         req->data[off + 7] = (c >> 8) & 0xff;
1325                                         lba += c;
1326                                         count -= c;
1327                                         ranges++;
1328                                 }
1329
1330                                 /* Try to merge multiple TRIM requests */
1331                                 req->bios[bps++] = bio1;
1332                                 bio1 = bioq_first(&softc->bio_queue_trim);
1333                                 if (bio1 == NULL ||
1334                                     bio1->bio_buf->b_bcount / softc->params.secsize >
1335                                     (softc->trim_max_ranges - ranges) * 0xffff)
1336                                         break;
1337                         }
1338
1339
1340                         cam_fill_csio(&start_ccb->csio,
1341                             1/*retries*/,
1342                             dadone,
1343                             CAM_DIR_OUT,
1344                             MSG_SIMPLE_Q_TAG,
1345                             req->data,
1346                             ((ranges +63)/64)*512,
1347                             SSD_FULL_SIZE,
1348                             sizeof(struct scsi_rw_6),
1349                             da_default_timeout*2);
1350
1351                         start_ccb->ccb_h.ccb_state = DA_CCB_TRIM;
1352                         LIST_INSERT_HEAD(&softc->pending_ccbs,
1353                             &start_ccb->ccb_h, periph_links.le);
1354                         start_ccb->csio.ccb_h.func_code = XPT_TRIM;
1355                         start_ccb->ccb_h.ccb_bio = bio;
1356                         devstat_start_transaction(&softc->device_stats);
1357                         xpt_action(start_ccb);
1358                         xpt_schedule(periph, 1);
1359                         break;
1360                 }
1361
1362                 /*
1363                  * Select a read or write buffer to queue.  Limit the number
1364                  * of tags dedicated to reading or writing, giving reads
1365                  * precedence.
1366                  *
1367                  * Writes to modern hard drives go into the HDs cache and
1368                  * return completion nearly instantly.  That is until the
1369                  * cache becomes full.  When the HDs cache becomes full
1370                  * write commands will begin to stall.  If all available
1371                  * tags are taken up by writes which saturate the drive
1372                  * reads will become tag-starved.
1373                  *
1374                  * A similar situation can occur with reads.  With many
1375                  * parallel readers all tags can be taken up by reads
1376                  * and prevent any writes from draining, even if the HD's
1377                  * cache is not full.
1378                  */
1379                 limit = periph->sim->max_tagged_dev_openings * 2 / 3 + 1;
1380 #if 0
1381                 /* DEBUGGING */
1382                 static int savets;
1383                 static long savets2;
1384                 if (1 || time_uptime != savets2 || (ticks != savets && (softc->outstanding_cmds_rd || softc->outstanding_cmds_wr))) {
1385                         kprintf("%d %d (%d)\n",
1386                                 softc->outstanding_cmds_rd,
1387                                 softc->outstanding_cmds_wr,
1388                                 limit);
1389                         savets = ticks;
1390                         savets2 = time_uptime;
1391                 }
1392 #endif
1393                 if (bio_rd && softc->outstanding_cmds_rd < limit) {
1394                         bio = bio_rd;
1395                         bioq_remove(&softc->bio_queue_rd, bio);
1396                 } else if (bio_wr && softc->outstanding_cmds_wr < limit) {
1397                         bio = bio_wr;
1398                         bioq_remove(&softc->bio_queue_wr, bio);
1399                 } else {
1400                         if (bio_rd)
1401                                 softc->flags |= DA_FLAG_RD_LIMIT;
1402                         if (bio_wr)
1403                                 softc->flags |= DA_FLAG_WR_LIMIT;
1404                         xpt_release_ccb(start_ccb);
1405                         break;
1406                 }
1407
1408                 /*
1409                  * We can queue new work.
1410                  */
1411                 bp = bio->bio_buf;
1412
1413                 devstat_start_transaction(&softc->device_stats);
1414
1415                 tag_code = MSG_SIMPLE_Q_TAG;
1416
1417                 switch(bp->b_cmd) {
1418                 case BUF_CMD_READ:
1419                 case BUF_CMD_WRITE:
1420                         /*
1421                          * Block read/write op
1422                          */
1423                         KKASSERT(bio->bio_offset % softc->params.secsize == 0);
1424
1425                         scsi_read_write(
1426                                 &start_ccb->csio,
1427                                 da_retry_count,         /* retries */
1428                                 dadone,
1429                                 tag_code,
1430                                 (bp->b_cmd == BUF_CMD_READ),
1431                                 0,                      /* byte2 */
1432                                 softc->minimum_cmd_size,
1433                                 bio->bio_offset / softc->params.secsize,
1434                                 bp->b_bcount / softc->params.secsize,
1435                                 bp->b_data,
1436                                 bp->b_bcount,
1437                                 SSD_FULL_SIZE,          /* sense_len */
1438                                 da_default_timeout * 1000
1439                         );
1440                         break;
1441                 case BUF_CMD_FLUSH:
1442                         /*
1443                          * Silently complete a flush request if the device
1444                          * cannot handle it.
1445                          */
1446                         if (softc->quirks & DA_Q_NO_SYNC_CACHE) {
1447                                 xpt_release_ccb(start_ccb);
1448                                 start_ccb = NULL;
1449                                 devstat_end_transaction_buf(
1450                                         &softc->device_stats, bp);
1451                                 biodone(bio);
1452                         } else {
1453                                 scsi_synchronize_cache(
1454                                         &start_ccb->csio,
1455                                         1,              /* retries */
1456                                         dadone,         /* cbfcnp */
1457                                         MSG_SIMPLE_Q_TAG,
1458                                         0,              /* lba */
1459                                         0,              /* count (whole disk) */
1460                                         SSD_FULL_SIZE,
1461                                         da_default_timeout*1000 /* timeout */
1462                                 );
1463                         }
1464                         break;
1465                 case BUF_CMD_FREEBLKS:
1466                         if (softc->disk.d_info.d_trimflag & DA_FLAG_CAN_TRIM){
1467                                 start_ccb->csio.ccb_h.func_code = XPT_TRIM;
1468                                 break;
1469                         }
1470                 default:
1471                         xpt_release_ccb(start_ccb);
1472                         start_ccb = NULL;
1473                         panic("dastart: unrecognized bio cmd %d", bp->b_cmd);
1474                         break; /* NOT REACHED */
1475                 }
1476
1477                 /*
1478                  * Block out any asyncronous callbacks
1479                  * while we touch the pending ccb list.
1480                  */
1481                 if (start_ccb) {
1482                         start_ccb->ccb_h.ccb_state = DA_CCB_BUFFER_IO;
1483                         LIST_INSERT_HEAD(&softc->pending_ccbs,
1484                                          &start_ccb->ccb_h, periph_links.le);
1485                         if (bp->b_cmd == BUF_CMD_WRITE ||
1486                             bp->b_cmd == BUF_CMD_FLUSH) {
1487                                 ++softc->outstanding_cmds_wr;
1488                         } else {
1489                                 ++softc->outstanding_cmds_rd;
1490                         }
1491
1492                         /* We expect a unit attention from this device */
1493                         if ((softc->flags & DA_FLAG_RETRY_UA) != 0) {
1494                                 start_ccb->ccb_h.ccb_state |= DA_CCB_RETRY_UA;
1495                                 softc->flags &= ~DA_FLAG_RETRY_UA;
1496                         }
1497
1498                         start_ccb->ccb_h.ccb_bio = bio;
1499                         xpt_action(start_ccb);
1500                 }
1501                 
1502                 /*
1503                  * Be sure we stay scheduled if we have more work to do.
1504                  */
1505                 if (bioq_first(&softc->bio_queue_rd) ||
1506                     bioq_first(&softc->bio_queue_wr)) {
1507                         xpt_schedule(periph, 1);
1508                 }
1509                 break;
1510         }
1511         case DA_STATE_PROBE:
1512         {
1513                 struct ccb_scsiio *csio;
1514                 struct scsi_read_capacity_data *rcap;
1515
1516                 rcap = kmalloc(sizeof(*rcap), M_SCSIDA, M_INTWAIT | M_ZERO);
1517                 csio = &start_ccb->csio;
1518                 scsi_read_capacity(csio,
1519                                    /*retries*/4,
1520                                    dadone,
1521                                    MSG_SIMPLE_Q_TAG,
1522                                    rcap,
1523                                    SSD_FULL_SIZE,
1524                                    /*timeout*/5000);
1525                 start_ccb->ccb_h.ccb_bio = NULL;
1526                 start_ccb->ccb_h.ccb_state = DA_CCB_PROBE;
1527                 xpt_action(start_ccb);
1528                 break;
1529         }
1530         case DA_STATE_PROBE2:
1531         {
1532                 struct ccb_scsiio *csio;
1533                 struct scsi_read_capacity_data_16 *rcaplong;
1534
1535                 rcaplong = kmalloc(sizeof(*rcaplong), M_SCSIDA,
1536                                    M_INTWAIT | M_ZERO);
1537                 csio = &start_ccb->csio;
1538                 scsi_read_capacity_16(csio,
1539                                     /*retries*/ 4,
1540                                     /*cbfcnp*/ dadone,
1541                                     /*tag_action*/ MSG_SIMPLE_Q_TAG,
1542                                     /*lba*/ 0,
1543                                     /*reladr*/ 0,
1544                                     /*pmi*/ 0,
1545                                     rcaplong,
1546                                     /*sense_len*/ SSD_FULL_SIZE,
1547                                     /*timeout*/ 60000);
1548                 start_ccb->ccb_h.ccb_bio = NULL;
1549                 start_ccb->ccb_h.ccb_state = DA_CCB_PROBE2;
1550                 xpt_action(start_ccb);  
1551                 break;
1552         }
1553         }
1554 }
1555
1556 static int
1557 cmd6workaround(union ccb *ccb)
1558 {
1559         struct scsi_rw_6 cmd6;
1560         struct scsi_rw_10 *cmd10;
1561         struct da_softc *softc;
1562         u_int8_t *cdb;
1563         int frozen;
1564
1565         cdb = ccb->csio.cdb_io.cdb_bytes;
1566
1567         /* Translation only possible if CDB is an array and cmd is R/W6 */
1568         if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0 ||
1569             (*cdb != READ_6 && *cdb != WRITE_6))
1570                 return 0;
1571
1572         xpt_print(ccb->ccb_h.path, "READ(6)/WRITE(6) not supported, "
1573             "increasing minimum_cmd_size to 10.\n");
1574         softc = (struct da_softc *)xpt_path_periph(ccb->ccb_h.path)->softc;
1575         softc->minimum_cmd_size = 10;
1576
1577         bcopy(cdb, &cmd6, sizeof(struct scsi_rw_6));
1578         cmd10 = (struct scsi_rw_10 *)cdb;
1579         cmd10->opcode = (cmd6.opcode == READ_6) ? READ_10 : WRITE_10;
1580         cmd10->byte2 = 0;
1581         scsi_ulto4b(scsi_3btoul(cmd6.addr), cmd10->addr);
1582         cmd10->reserved = 0;
1583         scsi_ulto2b(cmd6.length, cmd10->length);
1584         cmd10->control = cmd6.control;
1585         ccb->csio.cdb_len = sizeof(*cmd10);
1586
1587         /* Requeue request, unfreezing queue if necessary */
1588         frozen = (ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
1589         ccb->ccb_h.status = CAM_REQUEUE_REQ;
1590         xpt_action(ccb);
1591         if (frozen) {
1592                 cam_release_devq(ccb->ccb_h.path,
1593                                  /*relsim_flags*/0,
1594                                  /*reduction*/0,
1595                                  /*timeout*/0,
1596                                  /*getcount_only*/0);
1597         }
1598         return (ERESTART);
1599 }
1600
1601 static void
1602 dadone(struct cam_periph *periph, union ccb *done_ccb)
1603 {
1604         struct da_softc *softc;
1605         struct ccb_scsiio *csio;
1606         struct disk_info info;
1607
1608         softc = (struct da_softc *)periph->softc;
1609         csio = &done_ccb->csio;
1610         switch (csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) {
1611         case DA_CCB_BUFFER_IO:
1612         case DA_CCB_TRIM:
1613         {
1614                 struct buf *bp;
1615                 struct bio *bio;
1616                 int mustsched = 0;
1617
1618                 bio = (struct bio *)done_ccb->ccb_h.ccb_bio;
1619                 bp = bio->bio_buf;
1620                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1621                         int error;
1622                         int sf;
1623                         
1624                         if ((csio->ccb_h.ccb_state & DA_CCB_RETRY_UA) != 0)
1625                                 sf = SF_RETRY_UA;
1626                         else
1627                                 sf = 0;
1628
1629                         error = daerror(done_ccb, CAM_RETRY_SELTO, sf);
1630                         if (error == ERESTART) {
1631                                 /*
1632                                  * A retry was scheuled, so
1633                                  * just return.
1634                                  */
1635                                 return;
1636                         }
1637                         if (error != 0) {
1638                                 if (error == ENXIO) {
1639                                         /*
1640                                          * Catastrophic error.  Mark our pack as
1641                                          * invalid.
1642                                          */
1643                                         /*
1644                                          * XXX See if this is really a media
1645                                          * XXX change first?
1646                                          */
1647                                         xpt_print(periph->path,
1648                                             "Invalidating pack\n");
1649                                         softc->flags |= DA_FLAG_PACK_INVALID;
1650                                 }
1651
1652                                 /*
1653                                  * Return all queued write I/O's with EIO
1654                                  * so the client can retry these I/Os in the
1655                                  * proper order should it attempt to recover.
1656                                  *
1657                                  * Leave read I/O's alone.
1658                                  */
1659                                 daflushbioq(&softc->bio_queue_wr, EIO);
1660                                 bp->b_error = error;
1661                                 bp->b_resid = bp->b_bcount;
1662                                 bp->b_flags |= B_ERROR;
1663                         } else {
1664                                 bp->b_resid = csio->resid;
1665                                 bp->b_error = 0;
1666                                 if (bp->b_resid != 0)
1667                                         bp->b_flags |= B_ERROR;
1668                         }
1669                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1670                                 cam_release_devq(done_ccb->ccb_h.path,
1671                                                  /*relsim_flags*/0,
1672                                                  /*reduction*/0,
1673                                                  /*timeout*/0,
1674                                                  /*getcount_only*/0);
1675                 } else {
1676                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1677                                 panic("REQ_CMP with QFRZN");
1678                         bp->b_resid = csio->resid;
1679                         if (csio->resid > 0)
1680                                 bp->b_flags |= B_ERROR;
1681                 }
1682
1683                 /*
1684                  * Block out any asyncronous callbacks
1685                  * while we touch the pending ccb list.
1686                  */
1687                 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
1688                 if (bp->b_cmd == BUF_CMD_WRITE || bp->b_cmd == BUF_CMD_FLUSH) {
1689                         --softc->outstanding_cmds_wr;
1690                         if (softc->flags & DA_FLAG_WR_LIMIT) {
1691                                 softc->flags &= ~DA_FLAG_WR_LIMIT;
1692                                 mustsched = 1;
1693                         }
1694                 } else {
1695                         --softc->outstanding_cmds_rd;
1696                         if (softc->flags & DA_FLAG_RD_LIMIT) {
1697                                 softc->flags &= ~DA_FLAG_RD_LIMIT;
1698                                 mustsched = 1;
1699                         }
1700                 }
1701
1702                 devstat_end_transaction_buf(&softc->device_stats, bp);
1703                 if ((csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) ==
1704                     DA_CCB_TRIM) {
1705                         struct trim_request *req =
1706                             (struct trim_request *) csio->data_ptr;
1707                         int i;
1708
1709                         for (i = 1; i < softc->trim_max_ranges &&
1710                             req->bios[i]; i++) {
1711                                 struct bio *bp1 = req->bios[i];
1712
1713                                 bp1->bio_buf->b_resid = bp->b_resid;
1714                                 bp1->bio_buf->b_error = bp->b_error;
1715                                 if (bp->b_flags & B_ERROR)
1716                                         bp1->bio_buf->b_flags |= B_ERROR;
1717                                 biodone(bp1);
1718                         }
1719                         softc->trim_running = 0;
1720                         biodone(bio);
1721                         xpt_schedule(periph,1);
1722                 } else
1723                         biodone(bio);
1724
1725
1726                 if (mustsched)
1727                         xpt_schedule(periph, /*priority*/1);
1728
1729                 break;
1730         }
1731         case DA_CCB_PROBE:
1732         case DA_CCB_PROBE2:
1733         {
1734                 struct     scsi_read_capacity_data *rdcap;
1735                 struct     scsi_read_capacity_data_16 *rcaplong;
1736                 char       announce_buf[80];
1737                 int        doinfo = 0;
1738
1739                 rdcap = NULL;
1740                 rcaplong = NULL;
1741                 if (softc->state == DA_STATE_PROBE)
1742                         rdcap =(struct scsi_read_capacity_data *)csio->data_ptr;
1743                 else
1744                         rcaplong = (struct scsi_read_capacity_data_16 *)
1745                                     csio->data_ptr;
1746
1747                 bzero(&info, sizeof(info));
1748                 info.d_type = DTYPE_SCSI;
1749                 info.d_serialno = xpt_path_serialno(periph->path);
1750                 
1751                 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
1752                         struct disk_params *dp;
1753                         uint32_t block_size;
1754                         uint64_t maxsector;
1755
1756                         if (softc->state == DA_STATE_PROBE) {
1757                                 block_size = scsi_4btoul(rdcap->length);
1758                                 maxsector = scsi_4btoul(rdcap->addr);
1759
1760                                 /*
1761                                  * According to SBC-2, if the standard 10
1762                                  * byte READ CAPACITY command returns 2^32,
1763                                  * we should issue the 16 byte version of
1764                                  * the command, since the device in question
1765                                  * has more sectors than can be represented
1766                                  * with the short version of the command.
1767                                  */
1768                                 if (maxsector == 0xffffffff) {
1769                                         softc->state = DA_STATE_PROBE2;
1770                                         kfree(rdcap, M_SCSIDA);
1771                                         xpt_release_ccb(done_ccb);
1772                                         xpt_schedule(periph, /*priority*/5);
1773                                         return;
1774                                 }
1775                         } else {
1776                                 block_size = scsi_4btoul(rcaplong->length);
1777                                 maxsector = scsi_8btou64(rcaplong->addr);
1778                         }
1779                         dasetgeom(periph, block_size, maxsector);
1780                         dp = &softc->params;
1781                         ksnprintf(announce_buf, sizeof(announce_buf),
1782                                 "%juMB (%ju %u byte sectors: %dH %dS/T %dC)",
1783                                 (uintmax_t) (((uintmax_t)dp->secsize *
1784                                 dp->sectors) / (1024*1024)),
1785                                 (uintmax_t)dp->sectors,
1786                                 dp->secsize, dp->heads, dp->secs_per_track,
1787                                 dp->cylinders);
1788                         
1789                         info.d_media_blksize = softc->params.secsize;
1790                         info.d_media_blocks = softc->params.sectors;
1791                         info.d_media_size = 0;
1792                         info.d_secpertrack = softc->params.secs_per_track;
1793                         info.d_nheads = softc->params.heads;
1794                         info.d_ncylinders = softc->params.cylinders;
1795                         info.d_secpercyl = softc->params.heads *
1796                                                 softc->params.secs_per_track;
1797                         info.d_serialno = xpt_path_serialno(periph->path);
1798                         doinfo = 1;
1799                 } else {
1800                         int     error;
1801
1802                         announce_buf[0] = '\0';
1803
1804                         /*
1805                          * Retry any UNIT ATTENTION type errors.  They
1806                          * are expected at boot.
1807                          */
1808                         error = daerror(done_ccb, CAM_RETRY_SELTO,
1809                                         SF_RETRY_UA|SF_NO_PRINT);
1810                         if (error == ERESTART) {
1811                                 /*
1812                                  * A retry was scheuled, so
1813                                  * just return.
1814                                  */
1815                                 return;
1816                         } else if (error != 0) {
1817                                 struct scsi_sense_data *sense;
1818                                 int asc, ascq;
1819                                 int sense_key, error_code;
1820                                 int have_sense;
1821                                 cam_status status;
1822                                 struct ccb_getdev cgd;
1823
1824                                 /* Don't wedge this device's queue */
1825                                 status = done_ccb->ccb_h.status;
1826                                 if ((status & CAM_DEV_QFRZN) != 0)
1827                                         cam_release_devq(done_ccb->ccb_h.path,
1828                                                          /*relsim_flags*/0,
1829                                                          /*reduction*/0,
1830                                                          /*timeout*/0,
1831                                                          /*getcount_only*/0);
1832
1833
1834                                 xpt_setup_ccb(&cgd.ccb_h, 
1835                                               done_ccb->ccb_h.path,
1836                                               /* priority */ 1);
1837                                 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
1838                                 xpt_action((union ccb *)&cgd);
1839
1840                                 if (((csio->ccb_h.flags & CAM_SENSE_PHYS) != 0)
1841                                  || ((csio->ccb_h.flags & CAM_SENSE_PTR) != 0)
1842                                  || ((status & CAM_AUTOSNS_VALID) == 0))
1843                                         have_sense = FALSE;
1844                                 else
1845                                         have_sense = TRUE;
1846
1847                                 if (have_sense) {
1848                                         sense = &csio->sense_data;
1849                                         scsi_extract_sense(sense, &error_code,
1850                                                            &sense_key, 
1851                                                            &asc, &ascq);
1852                                 }
1853                                 /*
1854                                  * Attach to anything that claims to be a
1855                                  * direct access or optical disk device,
1856                                  * as long as it doesn't return a "Logical
1857                                  * unit not supported" (0x25) error.
1858                                  */
1859                                 if ((have_sense) && (asc != 0x25)
1860                                  && (error_code == SSD_CURRENT_ERROR)) {
1861                                         const char *sense_key_desc;
1862                                         const char *asc_desc;
1863
1864                                         scsi_sense_desc(sense_key, asc, ascq,
1865                                                         &cgd.inq_data,
1866                                                         &sense_key_desc,
1867                                                         &asc_desc);
1868                                         ksnprintf(announce_buf,
1869                                             sizeof(announce_buf),
1870                                                 "Attempt to query device "
1871                                                 "size failed: %s, %s",
1872                                                 sense_key_desc,
1873                                                 asc_desc);
1874                                         info.d_media_blksize = 512;
1875                                         doinfo = 1;
1876                                 } else {
1877                                         if (have_sense)
1878                                                 scsi_sense_print(
1879                                                         &done_ccb->csio);
1880                                         else {
1881                                                 xpt_print(periph->path,
1882                                                     "got CAM status %#x\n",
1883                                                     done_ccb->ccb_h.status);
1884                                         }
1885
1886                                         xpt_print(periph->path, "fatal error, "
1887                                             "failed to attach to device\n");
1888
1889                                         /*
1890                                          * Free up resources.
1891                                          */
1892                                         cam_periph_invalidate(periph);
1893                                 } 
1894                         }
1895                 }
1896                 kfree(csio->data_ptr, M_SCSIDA);
1897                 if (announce_buf[0] != '\0') {
1898                         xpt_announce_periph(periph, announce_buf);
1899                         /*
1900                          * Create our sysctl variables, now that we know
1901                          * we have successfully attached.
1902                          */
1903                         taskqueue_enqueue(taskqueue_thread[mycpuid],
1904                             &softc->sysctl_task);
1905                 }
1906
1907                 if (softc->trim_max_ranges) {
1908                         softc->disk.d_info.d_trimflag |= DA_FLAG_CAN_TRIM;
1909                         kprintf("%s%d: supports TRIM\n",
1910                             periph->periph_name,
1911                             periph->unit_number);
1912                 }
1913                 softc->state = DA_STATE_NORMAL;
1914                 /*
1915                  * Since our peripheral may be invalidated by an error
1916                  * above or an external event, we must release our CCB
1917                  * before releasing the probe lock on the peripheral.
1918                  * The peripheral will only go away once the last lock
1919                  * is removed, and we need it around for the CCB release
1920                  * operation.
1921                  */
1922                 xpt_release_ccb(done_ccb);
1923                 cam_periph_unhold(periph, 0);
1924                 if (doinfo) {
1925                         CAM_SIM_UNLOCK(periph->sim);
1926                         disk_setdiskinfo(&softc->disk, &info);
1927                         CAM_SIM_LOCK(periph->sim);
1928                 }
1929                 return;
1930         }
1931         case DA_CCB_WAITING:
1932         {
1933                 /* Caller will release the CCB */
1934                 wakeup(&done_ccb->ccb_h.cbfcnp);
1935                 return;
1936         }
1937         case DA_CCB_DUMP:
1938                 /* No-op.  We're polling */
1939                 return;
1940         case DA_CCB_POLLED:
1941                 /* Caller releases ccb */
1942                 wakeup(&done_ccb->ccb_h.cbfcnp);
1943                 return;
1944         default:
1945                 break;
1946         }
1947         xpt_release_ccb(done_ccb);
1948 }
1949
1950 static int
1951 daerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
1952 {
1953         struct da_softc   *softc;
1954         struct cam_periph *periph;
1955         int error;
1956
1957         periph = xpt_path_periph(ccb->ccb_h.path);
1958         softc = (struct da_softc *)periph->softc;
1959
1960         /*
1961          * Automatically detect devices that do not support
1962          * READ(6)/WRITE(6) and upgrade to using 10 byte cdbs.
1963          */
1964         error = 0;
1965         if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INVALID) {
1966                 error = cmd6workaround(ccb);
1967         } else if (((ccb->ccb_h.status & CAM_STATUS_MASK) ==
1968                    CAM_SCSI_STATUS_ERROR)
1969          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)
1970          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
1971          && ((ccb->ccb_h.flags & CAM_SENSE_PHYS) == 0)
1972          && ((ccb->ccb_h.flags & CAM_SENSE_PTR) == 0)) {
1973                 int sense_key, error_code, asc, ascq;
1974
1975                 scsi_extract_sense(&ccb->csio.sense_data,
1976                                    &error_code, &sense_key, &asc, &ascq);
1977                 if (sense_key == SSD_KEY_ILLEGAL_REQUEST)
1978                         error = cmd6workaround(ccb);
1979         }
1980         if (error == ERESTART)
1981                 return (ERESTART);
1982
1983         /*
1984          * XXX
1985          * Until we have a better way of doing pack validation,
1986          * don't treat UAs as errors.
1987          */
1988         sense_flags |= SF_RETRY_UA;
1989         return(cam_periph_error(ccb, cam_flags, sense_flags,
1990                                 &softc->saved_ccb));
1991 }
1992
1993 static void
1994 daprevent(struct cam_periph *periph, int action)
1995 {
1996         struct  da_softc *softc;
1997         union   ccb *ccb;               
1998         int     error;
1999                 
2000         softc = (struct da_softc *)periph->softc;
2001
2002         if (((action == PR_ALLOW)
2003           && (softc->flags & DA_FLAG_PACK_LOCKED) == 0)
2004          || ((action == PR_PREVENT)
2005           && (softc->flags & DA_FLAG_PACK_LOCKED) != 0)) {
2006                 return;
2007         }
2008
2009         ccb = cam_periph_getccb(periph, /*priority*/1);
2010         ccb->ccb_h.ccb_state = DA_CCB_POLLED;
2011
2012         scsi_prevent(&ccb->csio,
2013                      /*retries*/1,
2014                      /*cbcfp*/dadone,
2015                      MSG_SIMPLE_Q_TAG,
2016                      action,
2017                      SSD_FULL_SIZE,
2018                      5000);
2019
2020         error = cam_periph_runccb(ccb, /*error_routine*/NULL, CAM_RETRY_SELTO,
2021                                   SF_RETRY_UA, &softc->device_stats);
2022
2023         if (error == 0) {
2024                 if (action == PR_ALLOW)
2025                         softc->flags &= ~DA_FLAG_PACK_LOCKED;
2026                 else
2027                         softc->flags |= DA_FLAG_PACK_LOCKED;
2028         }
2029
2030         xpt_release_ccb(ccb);
2031 }
2032
2033 /*
2034  * Check media on open, e.g. card reader devices which had no initial media.
2035  */
2036 static int
2037 dacheckmedia(struct cam_periph *periph)
2038 {
2039         struct disk_params *dp;
2040         struct da_softc *softc;
2041         struct disk_info info;
2042         int error;
2043
2044         softc = (struct da_softc *)periph->softc;
2045         dp = &softc->params;
2046
2047         error = dagetcapacity(periph);
2048
2049         /*
2050          * Only reprobe on initial open and if the media is removable.
2051          *
2052          * NOTE: If we setdiskinfo() it will take the device probe
2053          *       a bit of time to probe the slices and partitions,
2054          *       and mess up booting.  So avoid if nothing has changed.
2055          *       XXX
2056          */
2057         if (softc->flags & DA_FLAG_OPEN)
2058                 return (error);
2059         if ((softc->flags & DA_FLAG_PACK_REMOVABLE) == 0)
2060                 return (error);
2061
2062         bzero(&info, sizeof(info));
2063         info.d_type = DTYPE_SCSI;
2064         info.d_serialno = xpt_path_serialno(periph->path);
2065
2066         if (error == 0) {
2067                 CAM_SIM_UNLOCK(periph->sim);
2068                 info.d_media_blksize = softc->params.secsize;
2069                 info.d_media_blocks = softc->params.sectors;
2070                 info.d_media_size = 0;
2071                 info.d_secpertrack = softc->params.secs_per_track;
2072                 info.d_nheads = softc->params.heads;
2073                 info.d_ncylinders = softc->params.cylinders;
2074                 info.d_secpercyl = softc->params.heads *
2075                                         softc->params.secs_per_track;
2076                 info.d_serialno = xpt_path_serialno(periph->path);
2077                 if (info.d_media_blocks != softc->disk.d_info.d_media_blocks) {
2078                         kprintf("%s%d: open removable media: "
2079                                 "%juMB (%ju %u byte sectors: %dH %dS/T %dC)\n",
2080                                 periph->periph_name, periph->unit_number,
2081                                 (uintmax_t)(((uintmax_t)dp->secsize *
2082                                              dp->sectors) / (1024*1024)),
2083                                 (uintmax_t)dp->sectors, dp->secsize,
2084                                 dp->heads, dp->secs_per_track, dp->cylinders);
2085                         disk_setdiskinfo(&softc->disk, &info);
2086                 }
2087                 CAM_SIM_LOCK(periph->sim);
2088         } else {
2089                 kprintf("%s%d: open removable media: no media present\n",
2090                         periph->periph_name, periph->unit_number);
2091                 info.d_media_blksize = 512;
2092                 disk_setdiskinfo(&softc->disk, &info);
2093         }
2094         return (error);
2095 }
2096
2097 static int
2098 dagetcapacity(struct cam_periph *periph)
2099 {
2100         struct da_softc *softc;
2101         union ccb *ccb;
2102         struct scsi_read_capacity_data *rcap;
2103         struct scsi_read_capacity_data_16 *rcaplong;
2104         uint32_t block_len;
2105         uint64_t maxsector;
2106         int error;
2107  
2108         softc = (struct da_softc *)periph->softc;
2109         block_len = 0;
2110         maxsector = 0;
2111         error = 0;
2112  
2113         /* Do a read capacity */
2114         rcap = (struct scsi_read_capacity_data *)kmalloc(sizeof(*rcaplong),
2115                                                          M_SCSIDA, M_INTWAIT);
2116                 
2117         ccb = cam_periph_getccb(periph, /*priority*/1);
2118         ccb->ccb_h.ccb_state = DA_CCB_POLLED;
2119
2120         scsi_read_capacity(&ccb->csio,
2121                            /*retries*/4,
2122                            /*cbfncp*/dadone,
2123                            MSG_SIMPLE_Q_TAG,
2124                            rcap,
2125                            SSD_FULL_SIZE,
2126                            /*timeout*/60000);
2127         ccb->ccb_h.ccb_bio = NULL;
2128  
2129         error = cam_periph_runccb(ccb, daerror,
2130                                   /*cam_flags*/CAM_RETRY_SELTO,
2131                                   /*sense_flags*/SF_RETRY_UA,
2132                                   &softc->device_stats);
2133  
2134         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
2135                 cam_release_devq(ccb->ccb_h.path,
2136                                  /*relsim_flags*/0,
2137                                  /*reduction*/0,
2138                                  /*timeout*/0,
2139                                  /*getcount_only*/0);
2140  
2141         if (error == 0) {
2142                 block_len = scsi_4btoul(rcap->length);
2143                 maxsector = scsi_4btoul(rcap->addr);
2144
2145                 if (maxsector != 0xffffffff)
2146                         goto done;
2147         } else
2148                 goto done;
2149  
2150         rcaplong = (struct scsi_read_capacity_data_16 *)rcap;
2151  
2152         scsi_read_capacity_16(&ccb->csio,
2153                               /*retries*/ 4,
2154                               /*cbfcnp*/ dadone,
2155                               /*tag_action*/ MSG_SIMPLE_Q_TAG,
2156                               /*lba*/ 0,
2157                               /*reladr*/ 0,
2158                               /*pmi*/ 0,
2159                               rcaplong,
2160                               /*sense_len*/ SSD_FULL_SIZE,
2161                               /*timeout*/ 60000);
2162         ccb->ccb_h.ccb_bio = NULL;
2163  
2164         error = cam_periph_runccb(ccb, daerror,
2165                                   /*cam_flags*/CAM_RETRY_SELTO,
2166                                   /*sense_flags*/SF_RETRY_UA,
2167                                   &softc->device_stats);
2168  
2169         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
2170                 cam_release_devq(ccb->ccb_h.path,
2171                                  /*relsim_flags*/0,
2172                                  /*reduction*/0,
2173                                  /*timeout*/0,
2174                                  /*getcount_only*/0);
2175  
2176         if (error == 0) {
2177                 block_len = scsi_4btoul(rcaplong->length);
2178                 maxsector = scsi_8btou64(rcaplong->addr);
2179         }
2180
2181 done:
2182
2183         if (error == 0)
2184                 dasetgeom(periph, block_len, maxsector);
2185  
2186         xpt_release_ccb(ccb);
2187  
2188         kfree(rcap, M_SCSIDA);
2189  
2190         return (error);
2191 }
2192
2193 static void
2194 dasetgeom(struct cam_periph *periph, uint32_t block_len, uint64_t maxsector)
2195 {
2196         struct ccb_calc_geometry ccg;
2197         struct da_softc *softc;
2198         struct disk_params *dp;
2199
2200         softc = (struct da_softc *)periph->softc;
2201
2202         dp = &softc->params;
2203         dp->secsize = block_len;
2204         dp->sectors = maxsector + 1;
2205         /*
2206          * Have the controller provide us with a geometry
2207          * for this disk.  The only time the geometry
2208          * matters is when we boot and the controller
2209          * is the only one knowledgeable enough to come
2210          * up with something that will make this a bootable
2211          * device.
2212          */
2213         xpt_setup_ccb(&ccg.ccb_h, periph->path, /*priority*/1);
2214         ccg.ccb_h.func_code = XPT_CALC_GEOMETRY;
2215         ccg.block_size = dp->secsize;
2216         ccg.volume_size = dp->sectors;
2217         ccg.heads = 0;
2218         ccg.secs_per_track = 0;
2219         ccg.cylinders = 0;
2220         xpt_action((union ccb*)&ccg);
2221         if ((ccg.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
2222                 /*
2223                  * We don't know what went wrong here- but just pick
2224                  * a geometry so we don't have nasty things like divide
2225                  * by zero.
2226                  */
2227                 dp->heads = 255;
2228                 dp->secs_per_track = 255;
2229                 dp->cylinders = dp->sectors / (255 * 255);
2230                 if (dp->cylinders == 0) {
2231                         dp->cylinders = 1;
2232                 }
2233         } else {
2234                 dp->heads = ccg.heads;
2235                 dp->secs_per_track = ccg.secs_per_track;
2236                 dp->cylinders = ccg.cylinders;
2237         }
2238 }
2239
2240 /*
2241  * Step through all DA peripheral drivers, and if the device is still open,
2242  * sync the disk cache to physical media.
2243  */
2244 static void
2245 dashutdown(void * arg, int howto)
2246 {
2247         struct cam_periph *periph;
2248         struct da_softc *softc;
2249
2250         TAILQ_FOREACH(periph, &dadriver.units, unit_links) {
2251                 union ccb ccb;
2252
2253                 cam_periph_lock(periph);
2254                 softc = (struct da_softc *)periph->softc;
2255
2256                 /*
2257                  * We only sync the cache if the drive is still open, and
2258                  * if the drive is capable of it..
2259                  */
2260                 if (((softc->flags & DA_FLAG_OPEN) == 0)
2261                  || (softc->quirks & DA_Q_NO_SYNC_CACHE)) {
2262                         cam_periph_unlock(periph);
2263                         continue;
2264                 }
2265
2266                 xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/1);
2267
2268                 ccb.ccb_h.ccb_state = DA_CCB_DUMP;
2269                 scsi_synchronize_cache(&ccb.csio,
2270                                        /*retries*/1,
2271                                        /*cbfcnp*/dadone,
2272                                        MSG_SIMPLE_Q_TAG,
2273                                        /*begin_lba*/0, /* whole disk */
2274                                        /*lb_count*/0,
2275                                        SSD_FULL_SIZE,
2276                                        60 * 60 * 1000);
2277
2278                 xpt_polled_action(&ccb);
2279
2280                 if ((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
2281                         if (((ccb.ccb_h.status & CAM_STATUS_MASK) ==
2282                              CAM_SCSI_STATUS_ERROR)
2283                          && (ccb.csio.scsi_status == SCSI_STATUS_CHECK_COND)){
2284                                 int error_code, sense_key, asc, ascq;
2285
2286                                 scsi_extract_sense(&ccb.csio.sense_data,
2287                                                    &error_code, &sense_key,
2288                                                    &asc, &ascq);
2289
2290                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
2291                                         scsi_sense_print(&ccb.csio);
2292                         } else {
2293                                 xpt_print(periph->path, "Synchronize "
2294                                     "cache failed, status == 0x%x, scsi status "
2295                                     "== 0x%x\n", ccb.ccb_h.status,
2296                                     ccb.csio.scsi_status);
2297                         }
2298                 }
2299
2300                 if ((ccb.ccb_h.status & CAM_DEV_QFRZN) != 0)
2301                         cam_release_devq(ccb.ccb_h.path,
2302                                          /*relsim_flags*/0,
2303                                          /*reduction*/0,
2304                                          /*timeout*/0,
2305                                          /*getcount_only*/0);
2306
2307                 cam_periph_unlock(periph);
2308         }
2309 }
2310
2311 #else /* !_KERNEL */
2312
2313 /*
2314  * XXX This is only left out of the kernel build to silence warnings.  If,
2315  * for some reason this function is used in the kernel, the ifdefs should
2316  * be moved so it is included both in the kernel and userland.
2317  */
2318 void
2319 scsi_format_unit(struct ccb_scsiio *csio, u_int32_t retries,
2320                  void (*cbfcnp)(struct cam_periph *, union ccb *),
2321                  u_int8_t tag_action, u_int8_t byte2, u_int16_t ileave,
2322                  u_int8_t *data_ptr, u_int32_t dxfer_len, u_int8_t sense_len,
2323                  u_int32_t timeout)
2324 {
2325         struct scsi_format_unit *scsi_cmd;
2326
2327         scsi_cmd = (struct scsi_format_unit *)&csio->cdb_io.cdb_bytes;
2328         scsi_cmd->opcode = FORMAT_UNIT;
2329         scsi_cmd->byte2 = byte2;
2330         scsi_ulto2b(ileave, scsi_cmd->interleave);
2331
2332         cam_fill_csio(csio,
2333                       retries,
2334                       cbfcnp,
2335                       /*flags*/ (dxfer_len > 0) ? CAM_DIR_OUT : CAM_DIR_NONE,
2336                       tag_action,
2337                       data_ptr,
2338                       dxfer_len,
2339                       sense_len,
2340                       sizeof(*scsi_cmd),
2341                       timeout);
2342 }
2343
2344 #endif /* _KERNEL */