The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/cam/scsi/scsi_da.c

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    1 /*-
    2  * Implementation of SCSI Direct Access Peripheral driver for CAM.
    3  *
    4  * Copyright (c) 1997 Justin T. Gibbs.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions, and the following disclaimer,
   12  *    without modification, immediately at the beginning of the file.
   13  * 2. The name of the author may not be used to endorse or promote products
   14  *    derived from this software without specific prior written permission.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/6.1/sys/cam/scsi/scsi_da.c 156853 2006-03-18 21:15:40Z joerg $");
   31 
   32 #include <sys/param.h>
   33 
   34 #ifdef _KERNEL
   35 #include <sys/systm.h>
   36 #include <sys/kernel.h>
   37 #include <sys/bio.h>
   38 #include <sys/sysctl.h>
   39 #include <sys/taskqueue.h>
   40 #endif /* _KERNEL */
   41 
   42 #include <sys/devicestat.h>
   43 #include <sys/conf.h>
   44 #include <sys/eventhandler.h>
   45 #include <sys/malloc.h>
   46 #include <sys/cons.h>
   47 
   48 #include <machine/md_var.h>
   49 
   50 #include <vm/vm.h>
   51 #include <vm/pmap.h>
   52 
   53 #include <geom/geom_disk.h>
   54 
   55 #ifndef _KERNEL
   56 #include <stdio.h>
   57 #include <string.h>
   58 #endif /* _KERNEL */
   59 
   60 #include <cam/cam.h>
   61 #include <cam/cam_ccb.h>
   62 #include <cam/cam_periph.h>
   63 #include <cam/cam_xpt_periph.h>
   64 
   65 #include <cam/scsi/scsi_message.h>
   66 
   67 #ifndef _KERNEL 
   68 #include <cam/scsi/scsi_da.h>
   69 #endif /* !_KERNEL */
   70 
   71 #ifdef _KERNEL
   72 typedef enum {
   73         DA_STATE_PROBE,
   74         DA_STATE_PROBE2,
   75         DA_STATE_NORMAL
   76 } da_state;
   77 
   78 typedef enum {
   79         DA_FLAG_PACK_INVALID    = 0x001,
   80         DA_FLAG_NEW_PACK        = 0x002,
   81         DA_FLAG_PACK_LOCKED     = 0x004,
   82         DA_FLAG_PACK_REMOVABLE  = 0x008,
   83         DA_FLAG_TAGGED_QUEUING  = 0x010,
   84         DA_FLAG_NEED_OTAG       = 0x020,
   85         DA_FLAG_WENT_IDLE       = 0x040,
   86         DA_FLAG_RETRY_UA        = 0x080,
   87         DA_FLAG_OPEN            = 0x100,
   88         DA_FLAG_SCTX_INIT       = 0x200
   89 } da_flags;
   90 
   91 typedef enum {
   92         DA_Q_NONE               = 0x00,
   93         DA_Q_NO_SYNC_CACHE      = 0x01,
   94         DA_Q_NO_6_BYTE          = 0x02,
   95         DA_Q_NO_PREVENT         = 0x04
   96 } da_quirks;
   97 
   98 typedef enum {
   99         DA_CCB_PROBE            = 0x01,
  100         DA_CCB_PROBE2           = 0x02,
  101         DA_CCB_BUFFER_IO        = 0x03,
  102         DA_CCB_WAITING          = 0x04,
  103         DA_CCB_DUMP             = 0x05,
  104         DA_CCB_TYPE_MASK        = 0x0F,
  105         DA_CCB_RETRY_UA         = 0x10
  106 } da_ccb_state;
  107 
  108 /* Offsets into our private area for storing information */
  109 #define ccb_state       ppriv_field0
  110 #define ccb_bp          ppriv_ptr1
  111 
  112 struct disk_params {
  113         u_int8_t  heads;
  114         u_int32_t cylinders;
  115         u_int8_t  secs_per_track;
  116         u_int32_t secsize;      /* Number of bytes/sector */
  117         u_int64_t sectors;      /* total number sectors */
  118 };
  119 
  120 struct da_softc {
  121         struct   bio_queue_head bio_queue;
  122         SLIST_ENTRY(da_softc) links;
  123         LIST_HEAD(, ccb_hdr) pending_ccbs;
  124         da_state state;
  125         da_flags flags; 
  126         da_quirks quirks;
  127         int      minimum_cmd_size;
  128         int      ordered_tag_count;
  129         int      outstanding_cmds;
  130         struct   disk_params params;
  131         struct   disk *disk;
  132         union    ccb saved_ccb;
  133         struct task             sysctl_task;
  134         struct sysctl_ctx_list  sysctl_ctx;
  135         struct sysctl_oid       *sysctl_tree;
  136 };
  137 
  138 struct da_quirk_entry {
  139         struct scsi_inquiry_pattern inq_pat;
  140         da_quirks quirks;
  141 };
  142 
  143 static const char quantum[] = "QUANTUM";
  144 static const char microp[] = "MICROP";
  145 
  146 static struct da_quirk_entry da_quirk_table[] =
  147 {
  148         /* SPI, FC devices */
  149         {
  150                 /*
  151                  * Fujitsu M2513A MO drives.
  152                  * Tested devices: M2513A2 firmware versions 1200 & 1300.
  153                  * (dip switch selects whether T_DIRECT or T_OPTICAL device)
  154                  * Reported by: W.Scholten <whs@xs4all.nl>
  155                  */
  156                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
  157                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  158         },
  159         {
  160                 /* See above. */
  161                 {T_OPTICAL, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
  162                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  163         },
  164         {
  165                 /*
  166                  * This particular Fujitsu drive doesn't like the
  167                  * synchronize cache command.
  168                  * Reported by: Tom Jackson <toj@gorilla.net>
  169                  */
  170                 {T_DIRECT, SIP_MEDIA_FIXED, "FUJITSU", "M2954*", "*"},
  171                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  172         
  173         },
  174         {
  175                 /*
  176                  * This drive doesn't like the synchronize cache command
  177                  * either.  Reported by: Matthew Jacob <mjacob@feral.com>
  178                  * in NetBSD PR kern/6027, August 24, 1998.
  179                  */
  180                 {T_DIRECT, SIP_MEDIA_FIXED, microp, "2217*", "*"},
  181                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  182         },
  183         {
  184                 /*
  185                  * This drive doesn't like the synchronize cache command
  186                  * either.  Reported by: Hellmuth Michaelis (hm@kts.org)
  187                  * (PR 8882).
  188                  */
  189                 {T_DIRECT, SIP_MEDIA_FIXED, microp, "2112*", "*"},
  190                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  191         },
  192         {
  193                 /*
  194                  * Doesn't like the synchronize cache command.
  195                  * Reported by: Blaz Zupan <blaz@gold.amis.net>
  196                  */
  197                 {T_DIRECT, SIP_MEDIA_FIXED, "NEC", "D3847*", "*"},
  198                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  199         },
  200         {
  201                 /*
  202                  * Doesn't like the synchronize cache command.
  203                  * Reported by: Blaz Zupan <blaz@gold.amis.net>
  204                  */
  205                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "MAVERICK 540S", "*"},
  206                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  207         },
  208         {
  209                 /*
  210                  * Doesn't like the synchronize cache command.
  211                  */
  212                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS525S", "*"},
  213                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  214         },
  215         {
  216                 /*
  217                  * Doesn't like the synchronize cache command.
  218                  * Reported by: walter@pelissero.de
  219                  */
  220                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS540S", "*"},
  221                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  222         },
  223         {
  224                 /*
  225                  * Doesn't work correctly with 6 byte reads/writes.
  226                  * Returns illegal request, and points to byte 9 of the
  227                  * 6-byte CDB.
  228                  * Reported by:  Adam McDougall <bsdx@spawnet.com>
  229                  */
  230                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 4*", "*"},
  231                 /*quirks*/ DA_Q_NO_6_BYTE
  232         },
  233         {
  234                 /* See above. */
  235                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 2*", "*"},
  236                 /*quirks*/ DA_Q_NO_6_BYTE
  237         },
  238         {
  239                 /*
  240                  * Doesn't like the synchronize cache command.
  241                  * Reported by: walter@pelissero.de
  242                  */
  243                 {T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CP3500*", "*"},
  244                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  245         },
  246         {
  247                 /*
  248                  * The CISS RAID controllers do not support SYNC_CACHE
  249                  */
  250                 {T_DIRECT, SIP_MEDIA_FIXED, "COMPAQ", "RAID*", "*"},
  251                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  252         },
  253         /* USB mass storage devices supported by umass(4) */
  254         {
  255                 /*
  256                  * EXATELECOM (Sigmatel) i-Bead 100/105 USB Flash MP3 Player
  257                  * PR: kern/51675
  258                  */
  259                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "EXATEL", "i-BEAD10*", "*"},
  260                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  261         },
  262         {
  263                 /*
  264                  * Power Quotient Int. (PQI) USB flash key
  265                  * PR: kern/53067
  266                  */
  267                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "Generic*", "USB Flash Disk*",
  268                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  269         }, 
  270         {
  271                 /*
  272                  * Creative Nomad MUVO mp3 player (USB)
  273                  * PR: kern/53094
  274                  */
  275                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "NOMAD_MUVO", "*"},
  276                 /*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
  277         },
  278         {
  279                 /*
  280                  * Jungsoft NEXDISK USB flash key
  281                  * PR: kern/54737
  282                  */
  283                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "JUNGSOFT", "NEXDISK*", "*"},
  284                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  285         },
  286         {
  287                 /*
  288                  * FreeDik USB Mini Data Drive
  289                  * PR: kern/54786
  290                  */
  291                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "FreeDik*", "Mini Data Drive",
  292                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  293         },
  294         {
  295                 /*
  296                  * Sigmatel USB Flash MP3 Player
  297                  * PR: kern/57046
  298                  */
  299                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "SigmaTel", "MSCN", "*"},
  300                 /*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
  301         },
  302         {
  303                 /*
  304                  * Neuros USB Digital Audio Computer
  305                  * PR: kern/63645
  306                  */
  307                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "NEUROS", "dig. audio comp.",
  308                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  309         },
  310         {
  311                 /*
  312                  * SEAGRAND NP-900 MP3 Player
  313                  * PR: kern/64563
  314                  */
  315                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "SEAGRAND", "NP-900*", "*"},
  316                 /*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
  317         },
  318         {
  319                 /*
  320                  * iRiver iFP MP3 player (with UMS Firmware)
  321                  * PR: kern/54881, i386/63941, kern/66124
  322                  */
  323                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "iRiver", "iFP*", "*"},
  324                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  325         },
  326         {
  327                 /*
  328                  * Frontier Labs NEX IA+ Digital Audio Player, rev 1.10/0.01
  329                  * PR: kern/70158
  330                  */
  331                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "FL" , "Nex*", "*"},
  332                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  333         },
  334         {
  335                 /*
  336                  * ZICPlay USB MP3 Player with FM
  337                  * PR: kern/75057
  338                  */
  339                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "ACTIONS*" , "USB DISK*", "*"},
  340                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  341         },
  342         {
  343                 /*
  344                  * TEAC USB floppy mechanisms
  345                  */
  346                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "TEAC" , "FD-05*", "*"},
  347                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  348         },
  349         {
  350                 /*
  351                  * Kingston DataTraveler II+ USB Pen-Drive.
  352                  * Reported by: Pawel Jakub Dawidek <pjd@FreeBSD.org>
  353                  */
  354                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "Kingston" , "DataTraveler II+", "*"},
  355                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  356         },
  357         {
  358                 /*
  359                  * Motorola E398 Mobile Phone (TransFlash memory card).
  360                  * Reported by: Wojciech A. Koszek <dunstan@FreeBSD.czest.pl>
  361                  * PR: usb/89889
  362                  */
  363                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "Motorola" , "Motorola Phone",
  364                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  365         },
  366         {
  367                 /*
  368                  * Qware BeatZkey! Pro
  369                  * PR: usb/79164
  370                  */
  371                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "GENERIC", "USB DISK DEVICE",
  372                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  373         },
  374         {
  375                 /*
  376                  * Time DPA20B 1GB MP3 Player
  377                  * PR: usb/81846
  378                  */
  379                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "USB2.0*", "(FS) FLASH DISK*",
  380                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  381         },
  382         {
  383                 /*
  384                  * Samsung USB key 128Mb
  385                  * PR: usb/90081
  386                  */
  387                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "USB-DISK", "FreeDik-FlashUsb",
  388                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  389         },
  390         {
  391                 /*
  392                  * Kingston DataTraveler 2.0 USB Flash memory.
  393                  * PR: usb/89196
  394                  */
  395                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "Kingston", "DataTraveler 2.0",
  396                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  397         },
  398         {
  399                 /*
  400                  * Creative MUVO Slim mp3 player (USB)
  401                  * PR: usb/86131
  402                  */
  403                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "MuVo Slim",
  404                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
  405                 },
  406         {
  407                 /*
  408                  * United MP5512 Portable MP3 Player (2-in-1 USB DISK/MP3)
  409                  * PR: usb/80487
  410                  */
  411                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "Generic*", "MUSIC DISK",
  412                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  413         },
  414         {
  415                 /*
  416                  * SanDisk Micro Cruzer 128MB
  417                  * PR: usb/75970
  418                  */
  419                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "SanDisk" , "Micro Cruzer",
  420                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  421         },
  422         {
  423                 /*
  424                  * TOSHIBA TransMemory USB sticks
  425                  * PR: kern/94660
  426                  */
  427                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "TOSHIBA", "TransMemory",
  428                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  429         },
  430         {
  431                 /*
  432                  * PNY USB Flash keys
  433                  * PR: usb/75578, usb/72344, usb/65436 
  434                  */
  435                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "*" , "USB DISK*",
  436                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  437         },
  438         {
  439                 /*
  440                  * Genesys 6-in-1 Card Reader
  441                  * PR: usb/94647
  442                  */
  443                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "Generic*", "STORAGE DEVICE*",
  444                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  445         },
  446 };
  447 
  448 static  disk_strategy_t dastrategy;
  449 static  dumper_t        dadump;
  450 static  periph_init_t   dainit;
  451 static  void            daasync(void *callback_arg, u_int32_t code,
  452                                 struct cam_path *path, void *arg);
  453 static  void            dasysctlinit(void *context, int pending);
  454 static  int             dacmdsizesysctl(SYSCTL_HANDLER_ARGS);
  455 static  periph_ctor_t   daregister;
  456 static  periph_dtor_t   dacleanup;
  457 static  periph_start_t  dastart;
  458 static  periph_oninv_t  daoninvalidate;
  459 static  void            dadone(struct cam_periph *periph,
  460                                union ccb *done_ccb);
  461 static  int             daerror(union ccb *ccb, u_int32_t cam_flags,
  462                                 u_int32_t sense_flags);
  463 static void             daprevent(struct cam_periph *periph, int action);
  464 static int              dagetcapacity(struct cam_periph *periph);
  465 static void             dasetgeom(struct cam_periph *periph, uint32_t block_len,
  466                                   uint64_t maxsector);
  467 static timeout_t        dasendorderedtag;
  468 static void             dashutdown(void *arg, int howto);
  469 
  470 #ifndef DA_DEFAULT_TIMEOUT
  471 #define DA_DEFAULT_TIMEOUT 60   /* Timeout in seconds */
  472 #endif
  473 
  474 #ifndef DA_DEFAULT_RETRY
  475 #define DA_DEFAULT_RETRY        4
  476 #endif
  477 
  478 static int da_retry_count = DA_DEFAULT_RETRY;
  479 static int da_default_timeout = DA_DEFAULT_TIMEOUT;
  480 
  481 SYSCTL_NODE(_kern_cam, OID_AUTO, da, CTLFLAG_RD, 0,
  482             "CAM Direct Access Disk driver");
  483 SYSCTL_INT(_kern_cam_da, OID_AUTO, retry_count, CTLFLAG_RW,
  484            &da_retry_count, 0, "Normal I/O retry count");
  485 TUNABLE_INT("kern.cam.da.retry_count", &da_retry_count);
  486 SYSCTL_INT(_kern_cam_da, OID_AUTO, default_timeout, CTLFLAG_RW,
  487            &da_default_timeout, 0, "Normal I/O timeout (in seconds)");
  488 TUNABLE_INT("kern.cam.da.default_timeout", &da_default_timeout);
  489 
  490 /*
  491  * DA_ORDEREDTAG_INTERVAL determines how often, relative
  492  * to the default timeout, we check to see whether an ordered
  493  * tagged transaction is appropriate to prevent simple tag
  494  * starvation.  Since we'd like to ensure that there is at least
  495  * 1/2 of the timeout length left for a starved transaction to
  496  * complete after we've sent an ordered tag, we must poll at least
  497  * four times in every timeout period.  This takes care of the worst
  498  * case where a starved transaction starts during an interval that
  499  * meets the requirement "don't send an ordered tag" test so it takes
  500  * us two intervals to determine that a tag must be sent.
  501  */
  502 #ifndef DA_ORDEREDTAG_INTERVAL
  503 #define DA_ORDEREDTAG_INTERVAL 4
  504 #endif
  505 
  506 static struct periph_driver dadriver =
  507 {
  508         dainit, "da",
  509         TAILQ_HEAD_INITIALIZER(dadriver.units), /* generation */ 0
  510 };
  511 
  512 PERIPHDRIVER_DECLARE(da, dadriver);
  513 
  514 static SLIST_HEAD(,da_softc) softc_list;
  515 
  516 static int
  517 daopen(struct disk *dp)
  518 {
  519         struct cam_periph *periph;
  520         struct da_softc *softc;
  521         int unit;
  522         int error;
  523         int s;
  524 
  525         s = splsoftcam();
  526         periph = (struct cam_periph *)dp->d_drv1;
  527         if (periph == NULL) {
  528                 splx(s);
  529                 return (ENXIO); 
  530         }
  531         unit = periph->unit_number;
  532 
  533         softc = (struct da_softc *)periph->softc;
  534 
  535         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
  536             ("daopen: disk=%s%d (unit %d)\n", dp->d_name, dp->d_unit,
  537              unit));
  538 
  539         if ((error = cam_periph_lock(periph, PRIBIO|PCATCH)) != 0)
  540                 return (error); /* error code from tsleep */
  541 
  542         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
  543                 return(ENXIO);
  544         softc->flags |= DA_FLAG_OPEN;
  545 
  546         if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
  547                 /* Invalidate our pack information. */
  548                 softc->flags &= ~DA_FLAG_PACK_INVALID;
  549         }
  550         splx(s);
  551 
  552         error = dagetcapacity(periph);
  553 
  554         if (error == 0) {
  555 
  556                 softc->disk->d_sectorsize = softc->params.secsize;
  557                 softc->disk->d_mediasize = softc->params.secsize * (off_t)softc->params.sectors;
  558                 /* XXX: these are not actually "firmware" values, so they may be wrong */
  559                 softc->disk->d_fwsectors = softc->params.secs_per_track;
  560                 softc->disk->d_fwheads = softc->params.heads;
  561                 softc->disk->d_devstat->block_size = softc->params.secsize;
  562                 softc->disk->d_devstat->flags &= ~DEVSTAT_BS_UNAVAILABLE;
  563         }
  564         
  565         if (error == 0) {
  566                 if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0 &&
  567                     (softc->quirks & DA_Q_NO_PREVENT) == 0)
  568                         daprevent(periph, PR_PREVENT);
  569         } else {
  570                 softc->flags &= ~DA_FLAG_OPEN;
  571                 cam_periph_release(periph);
  572         }
  573         cam_periph_unlock(periph);
  574         return (error);
  575 }
  576 
  577 static int
  578 daclose(struct disk *dp)
  579 {
  580         struct  cam_periph *periph;
  581         struct  da_softc *softc;
  582         int     error;
  583 
  584         periph = (struct cam_periph *)dp->d_drv1;
  585         if (periph == NULL)
  586                 return (ENXIO); 
  587 
  588         softc = (struct da_softc *)periph->softc;
  589 
  590         if ((error = cam_periph_lock(periph, PRIBIO)) != 0) {
  591                 return (error); /* error code from tsleep */
  592         }
  593 
  594         if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
  595                 union   ccb *ccb;
  596 
  597                 ccb = cam_periph_getccb(periph, /*priority*/1);
  598 
  599                 scsi_synchronize_cache(&ccb->csio,
  600                                        /*retries*/1,
  601                                        /*cbfcnp*/dadone,
  602                                        MSG_SIMPLE_Q_TAG,
  603                                        /*begin_lba*/0,/* Cover the whole disk */
  604                                        /*lb_count*/0,
  605                                        SSD_FULL_SIZE,
  606                                        5 * 60 * 1000);
  607 
  608                 cam_periph_runccb(ccb, /*error_routine*/NULL, /*cam_flags*/0,
  609                                   /*sense_flags*/SF_RETRY_UA,
  610                                   softc->disk->d_devstat);
  611 
  612                 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
  613                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) ==
  614                              CAM_SCSI_STATUS_ERROR) {
  615                                 int asc, ascq;
  616                                 int sense_key, error_code;
  617 
  618                                 scsi_extract_sense(&ccb->csio.sense_data,
  619                                                    &error_code,
  620                                                    &sense_key, 
  621                                                    &asc, &ascq);
  622                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
  623                                         scsi_sense_print(&ccb->csio);
  624                         } else {
  625                                 xpt_print_path(periph->path);
  626                                 printf("Synchronize cache failed, status "
  627                                        "== 0x%x, scsi status == 0x%x\n",
  628                                        ccb->csio.ccb_h.status,
  629                                        ccb->csio.scsi_status);
  630                         }
  631                 }
  632 
  633                 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
  634                         cam_release_devq(ccb->ccb_h.path,
  635                                          /*relsim_flags*/0,
  636                                          /*reduction*/0,
  637                                          /*timeout*/0,
  638                                          /*getcount_only*/0);
  639 
  640                 xpt_release_ccb(ccb);
  641 
  642         }
  643 
  644         if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0) {
  645                 if ((softc->quirks & DA_Q_NO_PREVENT) == 0)
  646                         daprevent(periph, PR_ALLOW);
  647                 /*
  648                  * If we've got removeable media, mark the blocksize as
  649                  * unavailable, since it could change when new media is
  650                  * inserted.
  651                  */
  652                 softc->disk->d_devstat->flags |= DEVSTAT_BS_UNAVAILABLE;
  653         }
  654 
  655         softc->flags &= ~DA_FLAG_OPEN;
  656         cam_periph_unlock(periph);
  657         cam_periph_release(periph);
  658         return (0);     
  659 }
  660 
  661 /*
  662  * Actually translate the requested transfer into one the physical driver
  663  * can understand.  The transfer is described by a buf and will include
  664  * only one physical transfer.
  665  */
  666 static void
  667 dastrategy(struct bio *bp)
  668 {
  669         struct cam_periph *periph;
  670         struct da_softc *softc;
  671         int    s;
  672         
  673         periph = (struct cam_periph *)bp->bio_disk->d_drv1;
  674         if (periph == NULL) {
  675                 biofinish(bp, NULL, ENXIO);
  676                 return;
  677         }
  678         softc = (struct da_softc *)periph->softc;
  679 #if 0
  680         /*
  681          * check it's not too big a transfer for our adapter
  682          */
  683         scsi_minphys(bp,&sd_switch);
  684 #endif
  685 
  686         /*
  687          * Mask interrupts so that the pack cannot be invalidated until
  688          * after we are in the queue.  Otherwise, we might not properly
  689          * clean up one of the buffers.
  690          */
  691         s = splbio();
  692         
  693         /*
  694          * If the device has been made invalid, error out
  695          */
  696         if ((softc->flags & DA_FLAG_PACK_INVALID)) {
  697                 splx(s);
  698                 biofinish(bp, NULL, ENXIO);
  699                 return;
  700         }
  701         
  702         /*
  703          * Place it in the queue of disk activities for this disk
  704          */
  705         bioq_disksort(&softc->bio_queue, bp);
  706 
  707         splx(s);
  708         
  709         /*
  710          * Schedule ourselves for performing the work.
  711          */
  712         xpt_schedule(periph, /* XXX priority */1);
  713 
  714         return;
  715 }
  716 
  717 static int
  718 dadump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
  719 {
  720         struct      cam_periph *periph;
  721         struct      da_softc *softc;
  722         u_int       secsize;
  723         struct      ccb_scsiio csio;
  724         struct      disk *dp;
  725 
  726         dp = arg;
  727         periph = dp->d_drv1;
  728         if (periph == NULL)
  729                 return (ENXIO);
  730         softc = (struct da_softc *)periph->softc;
  731         secsize = softc->params.secsize;
  732         
  733         if ((softc->flags & DA_FLAG_PACK_INVALID) != 0)
  734                 return (ENXIO);
  735 
  736         if (length > 0) {
  737                 xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
  738                 csio.ccb_h.ccb_state = DA_CCB_DUMP;
  739                 scsi_read_write(&csio,
  740                                 /*retries*/1,
  741                                 dadone,
  742                                 MSG_ORDERED_Q_TAG,
  743                                 /*read*/FALSE,
  744                                 /*byte2*/0,
  745                                 /*minimum_cmd_size*/ softc->minimum_cmd_size,
  746                                 offset / secsize,
  747                                 length / secsize,
  748                                 /*data_ptr*/(u_int8_t *) virtual,
  749                                 /*dxfer_len*/length,
  750                                 /*sense_len*/SSD_FULL_SIZE,
  751                                 DA_DEFAULT_TIMEOUT * 1000);             
  752                 xpt_polled_action((union ccb *)&csio);
  753 
  754                 if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
  755                         printf("Aborting dump due to I/O error.\n");
  756                         if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
  757                              CAM_SCSI_STATUS_ERROR)
  758                                 scsi_sense_print(&csio);
  759                         else
  760                                 printf("status == 0x%x, scsi status == 0x%x\n",
  761                                        csio.ccb_h.status, csio.scsi_status);
  762                         return(EIO);
  763                 }
  764                 return(0);
  765         } 
  766                 
  767         /*
  768          * Sync the disk cache contents to the physical media.
  769          */
  770         if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
  771 
  772                 xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
  773                 csio.ccb_h.ccb_state = DA_CCB_DUMP;
  774                 scsi_synchronize_cache(&csio,
  775                                        /*retries*/1,
  776                                        /*cbfcnp*/dadone,
  777                                        MSG_SIMPLE_Q_TAG,
  778                                        /*begin_lba*/0,/* Cover the whole disk */
  779                                        /*lb_count*/0,
  780                                        SSD_FULL_SIZE,
  781                                        5 * 60 * 1000);
  782                 xpt_polled_action((union ccb *)&csio);
  783 
  784                 if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
  785                         if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
  786                              CAM_SCSI_STATUS_ERROR) {
  787                                 int asc, ascq;
  788                                 int sense_key, error_code;
  789 
  790                                 scsi_extract_sense(&csio.sense_data,
  791                                                    &error_code,
  792                                                    &sense_key, 
  793                                                    &asc, &ascq);
  794                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
  795                                         scsi_sense_print(&csio);
  796                         } else {
  797                                 xpt_print_path(periph->path);
  798                                 printf("Synchronize cache failed, status "
  799                                        "== 0x%x, scsi status == 0x%x\n",
  800                                        csio.ccb_h.status, csio.scsi_status);
  801                         }
  802                 }
  803         }
  804         return (0);
  805 }
  806 
  807 static void
  808 dainit(void)
  809 {
  810         cam_status status;
  811         struct cam_path *path;
  812 
  813         SLIST_INIT(&softc_list);
  814         
  815         /*
  816          * Install a global async callback.  This callback will
  817          * receive async callbacks like "new device found".
  818          */
  819         status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
  820                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
  821 
  822         if (status == CAM_REQ_CMP) {
  823                 struct ccb_setasync csa;
  824 
  825                 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
  826                 csa.ccb_h.func_code = XPT_SASYNC_CB;
  827                 csa.event_enable = AC_FOUND_DEVICE;
  828                 csa.callback = daasync;
  829                 csa.callback_arg = NULL;
  830                 xpt_action((union ccb *)&csa);
  831                 status = csa.ccb_h.status;
  832                 xpt_free_path(path);
  833         }
  834 
  835         if (status != CAM_REQ_CMP) {
  836                 printf("da: Failed to attach master async callback "
  837                        "due to status 0x%x!\n", status);
  838         } else {
  839 
  840                 /*
  841                  * Schedule a periodic event to occasionally send an
  842                  * ordered tag to a device.
  843                  */
  844                 timeout(dasendorderedtag, NULL,
  845                         (DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL);
  846 
  847                 /* Register our shutdown event handler */
  848                 if ((EVENTHANDLER_REGISTER(shutdown_post_sync, dashutdown, 
  849                                            NULL, SHUTDOWN_PRI_DEFAULT)) == NULL)
  850                     printf("dainit: shutdown event registration failed!\n");
  851         }
  852 }
  853 
  854 static void
  855 daoninvalidate(struct cam_periph *periph)
  856 {
  857         int s;
  858         struct da_softc *softc;
  859         struct ccb_setasync csa;
  860 
  861         softc = (struct da_softc *)periph->softc;
  862 
  863         /*
  864          * De-register any async callbacks.
  865          */
  866         xpt_setup_ccb(&csa.ccb_h, periph->path,
  867                       /* priority */ 5);
  868         csa.ccb_h.func_code = XPT_SASYNC_CB;
  869         csa.event_enable = 0;
  870         csa.callback = daasync;
  871         csa.callback_arg = periph;
  872         xpt_action((union ccb *)&csa);
  873 
  874         softc->flags |= DA_FLAG_PACK_INVALID;
  875 
  876         /*
  877          * Although the oninvalidate() routines are always called at
  878          * splsoftcam, we need to be at splbio() here to keep the buffer
  879          * queue from being modified while we traverse it.
  880          */
  881         s = splbio();
  882 
  883         /*
  884          * Return all queued I/O with ENXIO.
  885          * XXX Handle any transactions queued to the card
  886          *     with XPT_ABORT_CCB.
  887          */
  888         bioq_flush(&softc->bio_queue, NULL, ENXIO);
  889         splx(s);
  890 
  891         SLIST_REMOVE(&softc_list, softc, da_softc, links);
  892 
  893         disk_gone(softc->disk);
  894         xpt_print_path(periph->path);
  895         printf("lost device\n");
  896 }
  897 
  898 static void
  899 dacleanup(struct cam_periph *periph)
  900 {
  901         struct da_softc *softc;
  902 
  903         softc = (struct da_softc *)periph->softc;
  904 
  905         xpt_print_path(periph->path);
  906         printf("removing device entry\n");
  907         /*
  908          * If we can't free the sysctl tree, oh well...
  909          */
  910         if ((softc->flags & DA_FLAG_SCTX_INIT) != 0
  911             && sysctl_ctx_free(&softc->sysctl_ctx) != 0) {
  912                 xpt_print_path(periph->path);
  913                 printf("can't remove sysctl context\n");
  914         }
  915         disk_destroy(softc->disk);
  916         free(softc, M_DEVBUF);
  917 }
  918 
  919 static void
  920 daasync(void *callback_arg, u_int32_t code,
  921         struct cam_path *path, void *arg)
  922 {
  923         struct cam_periph *periph;
  924 
  925         periph = (struct cam_periph *)callback_arg;
  926         switch (code) {
  927         case AC_FOUND_DEVICE:
  928         {
  929                 struct ccb_getdev *cgd;
  930                 cam_status status;
  931  
  932                 cgd = (struct ccb_getdev *)arg;
  933                 if (cgd == NULL)
  934                         break;
  935 
  936                 if (SID_TYPE(&cgd->inq_data) != T_DIRECT
  937                     && SID_TYPE(&cgd->inq_data) != T_RBC
  938                     && SID_TYPE(&cgd->inq_data) != T_OPTICAL)
  939                         break;
  940 
  941                 /*
  942                  * Allocate a peripheral instance for
  943                  * this device and start the probe
  944                  * process.
  945                  */
  946                 status = cam_periph_alloc(daregister, daoninvalidate,
  947                                           dacleanup, dastart,
  948                                           "da", CAM_PERIPH_BIO,
  949                                           cgd->ccb_h.path, daasync,
  950                                           AC_FOUND_DEVICE, cgd);
  951 
  952                 if (status != CAM_REQ_CMP
  953                  && status != CAM_REQ_INPROG)
  954                         printf("daasync: Unable to attach to new device "
  955                                 "due to status 0x%x\n", status);
  956                 break;
  957         }
  958         case AC_SENT_BDR:
  959         case AC_BUS_RESET:
  960         {
  961                 struct da_softc *softc;
  962                 struct ccb_hdr *ccbh;
  963                 int s;
  964 
  965                 softc = (struct da_softc *)periph->softc;
  966                 s = splsoftcam();
  967                 /*
  968                  * Don't fail on the expected unit attention
  969                  * that will occur.
  970                  */
  971                 softc->flags |= DA_FLAG_RETRY_UA;
  972                 LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le)
  973                         ccbh->ccb_state |= DA_CCB_RETRY_UA;
  974                 splx(s);
  975                 /* FALLTHROUGH*/
  976         }
  977         default:
  978                 cam_periph_async(periph, code, path, arg);
  979                 break;
  980         }
  981 }
  982 
  983 static void
  984 dasysctlinit(void *context, int pending)
  985 {
  986         struct cam_periph *periph;
  987         struct da_softc *softc;
  988         char tmpstr[80], tmpstr2[80];
  989 
  990         periph = (struct cam_periph *)context;
  991         softc = (struct da_softc *)periph->softc;
  992 
  993         snprintf(tmpstr, sizeof(tmpstr), "CAM DA unit %d", periph->unit_number);
  994         snprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number);
  995 
  996         mtx_lock(&Giant);
  997         sysctl_ctx_init(&softc->sysctl_ctx);
  998         softc->flags |= DA_FLAG_SCTX_INIT;
  999         softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
 1000                 SYSCTL_STATIC_CHILDREN(_kern_cam_da), OID_AUTO, tmpstr2,
 1001                 CTLFLAG_RD, 0, tmpstr);
 1002         if (softc->sysctl_tree == NULL) {
 1003                 printf("dasysctlinit: unable to allocate sysctl tree\n");
 1004                 return;
 1005         }
 1006 
 1007         /*
 1008          * Now register the sysctl handler, so the user can the value on
 1009          * the fly.
 1010          */
 1011         SYSCTL_ADD_PROC(&softc->sysctl_ctx,SYSCTL_CHILDREN(softc->sysctl_tree),
 1012                 OID_AUTO, "minimum_cmd_size", CTLTYPE_INT | CTLFLAG_RW,
 1013                 &softc->minimum_cmd_size, 0, dacmdsizesysctl, "I",
 1014                 "Minimum CDB size");
 1015 
 1016         mtx_unlock(&Giant);
 1017 }
 1018 
 1019 static int
 1020 dacmdsizesysctl(SYSCTL_HANDLER_ARGS)
 1021 {
 1022         int error, value;
 1023 
 1024         value = *(int *)arg1;
 1025 
 1026         error = sysctl_handle_int(oidp, &value, 0, req);
 1027 
 1028         if ((error != 0)
 1029          || (req->newptr == NULL))
 1030                 return (error);
 1031 
 1032         /*
 1033          * Acceptable values here are 6, 10, 12 or 16.
 1034          */
 1035         if (value < 6)
 1036                 value = 6;
 1037         else if ((value > 6)
 1038               && (value <= 10))
 1039                 value = 10;
 1040         else if ((value > 10)
 1041               && (value <= 12))
 1042                 value = 12;
 1043         else if (value > 12)
 1044                 value = 16;
 1045 
 1046         *(int *)arg1 = value;
 1047 
 1048         return (0);
 1049 }
 1050 
 1051 static cam_status
 1052 daregister(struct cam_periph *periph, void *arg)
 1053 {
 1054         int s;
 1055         struct da_softc *softc;
 1056         struct ccb_setasync csa;
 1057         struct ccb_pathinq cpi;
 1058         struct ccb_getdev *cgd;
 1059         char tmpstr[80];
 1060         caddr_t match;
 1061 
 1062         cgd = (struct ccb_getdev *)arg;
 1063         if (periph == NULL) {
 1064                 printf("daregister: periph was NULL!!\n");
 1065                 return(CAM_REQ_CMP_ERR);
 1066         }
 1067 
 1068         if (cgd == NULL) {
 1069                 printf("daregister: no getdev CCB, can't register device\n");
 1070                 return(CAM_REQ_CMP_ERR);
 1071         }
 1072 
 1073         softc = (struct da_softc *)malloc(sizeof(*softc), M_DEVBUF,
 1074             M_NOWAIT|M_ZERO);
 1075 
 1076         if (softc == NULL) {
 1077                 printf("daregister: Unable to probe new device. "
 1078                        "Unable to allocate softc\n");                           
 1079                 return(CAM_REQ_CMP_ERR);
 1080         }
 1081 
 1082         LIST_INIT(&softc->pending_ccbs);
 1083         softc->state = DA_STATE_PROBE;
 1084         bioq_init(&softc->bio_queue);
 1085         if (SID_IS_REMOVABLE(&cgd->inq_data))
 1086                 softc->flags |= DA_FLAG_PACK_REMOVABLE;
 1087         if ((cgd->inq_data.flags & SID_CmdQue) != 0)
 1088                 softc->flags |= DA_FLAG_TAGGED_QUEUING;
 1089 
 1090         periph->softc = softc;
 1091 
 1092         /*
 1093          * See if this device has any quirks.
 1094          */
 1095         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
 1096                                (caddr_t)da_quirk_table,
 1097                                sizeof(da_quirk_table)/sizeof(*da_quirk_table),
 1098                                sizeof(*da_quirk_table), scsi_inquiry_match);
 1099 
 1100         if (match != NULL)
 1101                 softc->quirks = ((struct da_quirk_entry *)match)->quirks;
 1102         else
 1103                 softc->quirks = DA_Q_NONE;
 1104 
 1105         /* Check if the SIM does not want 6 byte commands */
 1106         xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
 1107         cpi.ccb_h.func_code = XPT_PATH_INQ;
 1108         xpt_action((union ccb *)&cpi);
 1109         if (cpi.ccb_h.status == CAM_REQ_CMP && (cpi.hba_misc & PIM_NO_6_BYTE))
 1110                 softc->quirks |= DA_Q_NO_6_BYTE;
 1111 
 1112         TASK_INIT(&softc->sysctl_task, 0, dasysctlinit, periph);
 1113 
 1114         /*
 1115          * RBC devices don't have to support READ(6), only READ(10).
 1116          */
 1117         if (softc->quirks & DA_Q_NO_6_BYTE || SID_TYPE(&cgd->inq_data) == T_RBC)
 1118                 softc->minimum_cmd_size = 10;
 1119         else
 1120                 softc->minimum_cmd_size = 6;
 1121 
 1122         /*
 1123          * Load the user's default, if any.
 1124          */
 1125         snprintf(tmpstr, sizeof(tmpstr), "kern.cam.da.%d.minimum_cmd_size",
 1126                  periph->unit_number);
 1127         TUNABLE_INT_FETCH(tmpstr, &softc->minimum_cmd_size);
 1128 
 1129         /*
 1130          * 6, 10, 12 and 16 are the currently permissible values.
 1131          */
 1132         if (softc->minimum_cmd_size < 6)
 1133                 softc->minimum_cmd_size = 6;
 1134         else if ((softc->minimum_cmd_size > 6)
 1135               && (softc->minimum_cmd_size <= 10))
 1136                 softc->minimum_cmd_size = 10;
 1137         else if ((softc->minimum_cmd_size > 10)
 1138               && (softc->minimum_cmd_size <= 12))
 1139                 softc->minimum_cmd_size = 12;
 1140         else if (softc->minimum_cmd_size > 12)
 1141                 softc->minimum_cmd_size = 16;
 1142 
 1143         /*
 1144          * Block our timeout handler while we
 1145          * add this softc to the dev list.
 1146          */
 1147         s = splsoftclock();
 1148         SLIST_INSERT_HEAD(&softc_list, softc, links);
 1149         splx(s);
 1150 
 1151         /*
 1152          * Register this media as a disk
 1153          */
 1154 
 1155         softc->disk = disk_alloc();
 1156         softc->disk->d_open = daopen;
 1157         softc->disk->d_close = daclose;
 1158         softc->disk->d_strategy = dastrategy;
 1159         softc->disk->d_dump = dadump;
 1160         softc->disk->d_name = "da";
 1161         softc->disk->d_drv1 = periph;
 1162         softc->disk->d_maxsize = DFLTPHYS; /* XXX: probably not arbitrary */
 1163         softc->disk->d_unit = periph->unit_number;
 1164         softc->disk->d_flags = DISKFLAG_NEEDSGIANT;
 1165         disk_create(softc->disk, DISK_VERSION);
 1166 
 1167         /*
 1168          * Add async callbacks for bus reset and
 1169          * bus device reset calls.  I don't bother
 1170          * checking if this fails as, in most cases,
 1171          * the system will function just fine without
 1172          * them and the only alternative would be to
 1173          * not attach the device on failure.
 1174          */
 1175         xpt_setup_ccb(&csa.ccb_h, periph->path, /*priority*/5);
 1176         csa.ccb_h.func_code = XPT_SASYNC_CB;
 1177         csa.event_enable = AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE;
 1178         csa.callback = daasync;
 1179         csa.callback_arg = periph;
 1180         xpt_action((union ccb *)&csa);
 1181         /*
 1182          * Lock this peripheral until we are setup.
 1183          * This first call can't block
 1184          */
 1185         (void)cam_periph_lock(periph, PRIBIO);
 1186         xpt_schedule(periph, /*priority*/5);
 1187 
 1188         return(CAM_REQ_CMP);
 1189 }
 1190 
 1191 static void
 1192 dastart(struct cam_periph *periph, union ccb *start_ccb)
 1193 {
 1194         struct da_softc *softc;
 1195 
 1196         softc = (struct da_softc *)periph->softc;
 1197 
 1198         
 1199         switch (softc->state) {
 1200         case DA_STATE_NORMAL:
 1201         {
 1202                 /* Pull a buffer from the queue and get going on it */          
 1203                 struct bio *bp;
 1204                 int s;
 1205 
 1206                 /*
 1207                  * See if there is a buf with work for us to do..
 1208                  */
 1209                 s = splbio();
 1210                 bp = bioq_first(&softc->bio_queue);
 1211                 if (periph->immediate_priority <= periph->pinfo.priority) {
 1212                         CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
 1213                                         ("queuing for immediate ccb\n"));
 1214                         start_ccb->ccb_h.ccb_state = DA_CCB_WAITING;
 1215                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
 1216                                           periph_links.sle);
 1217                         periph->immediate_priority = CAM_PRIORITY_NONE;
 1218                         splx(s);
 1219                         wakeup(&periph->ccb_list);
 1220                 } else if (bp == NULL) {
 1221                         splx(s);
 1222                         xpt_release_ccb(start_ccb);
 1223                 } else {
 1224                         int oldspl;
 1225                         u_int8_t tag_code;
 1226 
 1227                         bioq_remove(&softc->bio_queue, bp);
 1228 
 1229                         if ((softc->flags & DA_FLAG_NEED_OTAG) != 0) {
 1230                                 softc->flags &= ~DA_FLAG_NEED_OTAG;
 1231                                 softc->ordered_tag_count++;
 1232                                 tag_code = MSG_ORDERED_Q_TAG;
 1233                         } else {
 1234                                 tag_code = MSG_SIMPLE_Q_TAG;
 1235                         }
 1236                         scsi_read_write(&start_ccb->csio,
 1237                                         /*retries*/da_retry_count,
 1238                                         /*cbfcnp*/dadone,
 1239                                         /*tag_action*/tag_code,
 1240                                         /*read_op*/bp->bio_cmd == BIO_READ,
 1241                                         /*byte2*/0,
 1242                                         softc->minimum_cmd_size,
 1243                                         /*lba*/bp->bio_pblkno,
 1244                                         /*block_count*/bp->bio_bcount /
 1245                                         softc->params.secsize,
 1246                                         /*data_ptr*/ bp->bio_data,
 1247                                         /*dxfer_len*/ bp->bio_bcount,
 1248                                         /*sense_len*/SSD_FULL_SIZE,
 1249                                         /*timeout*/da_default_timeout*1000);
 1250                         start_ccb->ccb_h.ccb_state = DA_CCB_BUFFER_IO;
 1251 
 1252                         /*
 1253                          * Block out any asyncronous callbacks
 1254                          * while we touch the pending ccb list.
 1255                          */
 1256                         oldspl = splcam();
 1257                         LIST_INSERT_HEAD(&softc->pending_ccbs,
 1258                                          &start_ccb->ccb_h, periph_links.le);
 1259                         softc->outstanding_cmds++;
 1260                         splx(oldspl);
 1261 
 1262                         /* We expect a unit attention from this device */
 1263                         if ((softc->flags & DA_FLAG_RETRY_UA) != 0) {
 1264                                 start_ccb->ccb_h.ccb_state |= DA_CCB_RETRY_UA;
 1265                                 softc->flags &= ~DA_FLAG_RETRY_UA;
 1266                         }
 1267 
 1268                         start_ccb->ccb_h.ccb_bp = bp;
 1269                         bp = bioq_first(&softc->bio_queue);
 1270                         splx(s);
 1271 
 1272                         xpt_action(start_ccb);
 1273                 }
 1274                 
 1275                 if (bp != NULL) {
 1276                         /* Have more work to do, so ensure we stay scheduled */
 1277                         xpt_schedule(periph, /* XXX priority */1);
 1278                 }
 1279                 break;
 1280         }
 1281         case DA_STATE_PROBE:
 1282         {
 1283                 struct ccb_scsiio *csio;
 1284                 struct scsi_read_capacity_data *rcap;
 1285 
 1286                 rcap = (struct scsi_read_capacity_data *)malloc(sizeof(*rcap),
 1287                                                                 M_TEMP,
 1288                                                                 M_NOWAIT);
 1289                 if (rcap == NULL) {
 1290                         printf("dastart: Couldn't malloc read_capacity data\n");
 1291                         /* da_free_periph??? */
 1292                         break;
 1293                 }
 1294                 csio = &start_ccb->csio;
 1295                 scsi_read_capacity(csio,
 1296                                    /*retries*/4,
 1297                                    dadone,
 1298                                    MSG_SIMPLE_Q_TAG,
 1299                                    rcap,
 1300                                    SSD_FULL_SIZE,
 1301                                    /*timeout*/5000);
 1302                 start_ccb->ccb_h.ccb_bp = NULL;
 1303                 start_ccb->ccb_h.ccb_state = DA_CCB_PROBE;
 1304                 xpt_action(start_ccb);
 1305                 break;
 1306         }
 1307         case DA_STATE_PROBE2:
 1308         {
 1309                 struct ccb_scsiio *csio;
 1310                 struct scsi_read_capacity_data_long *rcaplong;
 1311 
 1312                 rcaplong = (struct scsi_read_capacity_data_long *)
 1313                         malloc(sizeof(*rcaplong), M_TEMP, M_NOWAIT);
 1314                 if (rcaplong == NULL) {
 1315                         printf("dastart: Couldn't malloc read_capacity data\n");
 1316                         /* da_free_periph??? */
 1317                         break;
 1318                 }
 1319                 csio = &start_ccb->csio;
 1320                 scsi_read_capacity_16(csio,
 1321                                       /*retries*/ 4,
 1322                                       /*cbfcnp*/ dadone,
 1323                                       /*tag_action*/ MSG_SIMPLE_Q_TAG,
 1324                                       /*lba*/ 0,
 1325                                       /*reladr*/ 0,
 1326                                       /*pmi*/ 0,
 1327                                       rcaplong,
 1328                                       /*sense_len*/ SSD_FULL_SIZE,
 1329                                       /*timeout*/ 60000);
 1330                 start_ccb->ccb_h.ccb_bp = NULL;
 1331                 start_ccb->ccb_h.ccb_state = DA_CCB_PROBE2;
 1332                 xpt_action(start_ccb);  
 1333                 break;
 1334         }
 1335         }
 1336 }
 1337 
 1338 static int
 1339 cmd6workaround(union ccb *ccb)
 1340 {
 1341         struct scsi_rw_6 cmd6;
 1342         struct scsi_rw_10 *cmd10;
 1343         struct da_softc *softc;
 1344         u_int8_t *cdb;
 1345         int frozen;
 1346 
 1347         cdb = ccb->csio.cdb_io.cdb_bytes;
 1348 
 1349         /* Translation only possible if CDB is an array and cmd is R/W6 */
 1350         if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0 ||
 1351             (*cdb != READ_6 && *cdb != WRITE_6))
 1352                 return 0;
 1353 
 1354         xpt_print_path(ccb->ccb_h.path);
 1355         printf("READ(6)/WRITE(6) not supported, "
 1356                "increasing minimum_cmd_size to 10.\n");
 1357         softc = (struct da_softc *)xpt_path_periph(ccb->ccb_h.path)->softc;
 1358         softc->minimum_cmd_size = 10;
 1359 
 1360         bcopy(cdb, &cmd6, sizeof(struct scsi_rw_6));
 1361         cmd10 = (struct scsi_rw_10 *)cdb;
 1362         cmd10->opcode = (cmd6.opcode == READ_6) ? READ_10 : WRITE_10;
 1363         cmd10->byte2 = 0;
 1364         scsi_ulto4b(scsi_3btoul(cmd6.addr), cmd10->addr);
 1365         cmd10->reserved = 0;
 1366         scsi_ulto2b(cmd6.length, cmd10->length);
 1367         cmd10->control = cmd6.control;
 1368         ccb->csio.cdb_len = sizeof(*cmd10);
 1369 
 1370         /* Requeue request, unfreezing queue if necessary */
 1371         frozen = (ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
 1372         ccb->ccb_h.status = CAM_REQUEUE_REQ;
 1373         xpt_action(ccb);
 1374         if (frozen) {
 1375                 cam_release_devq(ccb->ccb_h.path,
 1376                                  /*relsim_flags*/0,
 1377                                  /*reduction*/0,
 1378                                  /*timeout*/0,
 1379                                  /*getcount_only*/0);
 1380         }
 1381         return (ERESTART);
 1382 }
 1383 
 1384 static void
 1385 dadone(struct cam_periph *periph, union ccb *done_ccb)
 1386 {
 1387         struct da_softc *softc;
 1388         struct ccb_scsiio *csio;
 1389 
 1390         softc = (struct da_softc *)periph->softc;
 1391         csio = &done_ccb->csio;
 1392         switch (csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) {
 1393         case DA_CCB_BUFFER_IO:
 1394         {
 1395                 struct bio *bp;
 1396                 int    oldspl;
 1397 
 1398                 bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
 1399                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 1400                         int error;
 1401                         int s;
 1402                         int sf;
 1403                         
 1404                         if ((csio->ccb_h.ccb_state & DA_CCB_RETRY_UA) != 0)
 1405                                 sf = SF_RETRY_UA;
 1406                         else
 1407                                 sf = 0;
 1408 
 1409                         error = daerror(done_ccb, CAM_RETRY_SELTO, sf);
 1410                         if (error == ERESTART) {
 1411                                 /*
 1412                                  * A retry was scheuled, so
 1413                                  * just return.
 1414                                  */
 1415                                 return;
 1416                         }
 1417                         if (error != 0) {
 1418 
 1419                                 s = splbio();
 1420 
 1421                                 if (error == ENXIO) {
 1422                                         /*
 1423                                          * Catastrophic error.  Mark our pack as
 1424                                          * invalid.
 1425                                          */
 1426                                         /* XXX See if this is really a media
 1427                                          *     change first.
 1428                                          */
 1429                                         xpt_print_path(periph->path);
 1430                                         printf("Invalidating pack\n");
 1431                                         softc->flags |= DA_FLAG_PACK_INVALID;
 1432                                 }
 1433 
 1434                                 /*
 1435                                  * return all queued I/O with EIO, so that
 1436                                  * the client can retry these I/Os in the
 1437                                  * proper order should it attempt to recover.
 1438                                  */
 1439                                 bioq_flush(&softc->bio_queue, NULL, EIO);
 1440                                 splx(s);
 1441                                 bp->bio_error = error;
 1442                                 bp->bio_resid = bp->bio_bcount;
 1443                                 bp->bio_flags |= BIO_ERROR;
 1444                         } else {
 1445                                 bp->bio_resid = csio->resid;
 1446                                 bp->bio_error = 0;
 1447                                 if (bp->bio_resid != 0)
 1448                                         bp->bio_flags |= BIO_ERROR;
 1449                         }
 1450                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 1451                                 cam_release_devq(done_ccb->ccb_h.path,
 1452                                                  /*relsim_flags*/0,
 1453                                                  /*reduction*/0,
 1454                                                  /*timeout*/0,
 1455                                                  /*getcount_only*/0);
 1456                 } else {
 1457                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 1458                                 panic("REQ_CMP with QFRZN");
 1459                         bp->bio_resid = csio->resid;
 1460                         if (csio->resid > 0)
 1461                                 bp->bio_flags |= BIO_ERROR;
 1462                 }
 1463 
 1464                 /*
 1465                  * Block out any asyncronous callbacks
 1466                  * while we touch the pending ccb list.
 1467                  */
 1468                 oldspl = splcam();
 1469                 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
 1470                 softc->outstanding_cmds--;
 1471                 if (softc->outstanding_cmds == 0)
 1472                         softc->flags |= DA_FLAG_WENT_IDLE;
 1473                 splx(oldspl);
 1474 
 1475                 biodone(bp);
 1476                 break;
 1477         }
 1478         case DA_CCB_PROBE:
 1479         case DA_CCB_PROBE2:
 1480         {
 1481                 struct     scsi_read_capacity_data *rdcap;
 1482                 struct     scsi_read_capacity_data_long *rcaplong;
 1483                 char       announce_buf[80];
 1484 
 1485                 rdcap = NULL;
 1486                 rcaplong = NULL;
 1487                 if (softc->state == DA_STATE_PROBE)
 1488                         rdcap =(struct scsi_read_capacity_data *)csio->data_ptr;
 1489                 else
 1490                         rcaplong = (struct scsi_read_capacity_data_long *)
 1491                                 csio->data_ptr;
 1492 
 1493                 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
 1494                         struct disk_params *dp;
 1495                         uint32_t block_size;
 1496                         uint64_t maxsector;
 1497 
 1498                         if (softc->state == DA_STATE_PROBE) {
 1499                                 block_size = scsi_4btoul(rdcap->length);
 1500                                 maxsector = scsi_4btoul(rdcap->addr);
 1501 
 1502                                 /*
 1503                                  * According to SBC-2, if the standard 10
 1504                                  * byte READ CAPACITY command returns 2^32,
 1505                                  * we should issue the 16 byte version of
 1506                                  * the command, since the device in question
 1507                                  * has more sectors than can be represented
 1508                                  * with the short version of the command.
 1509                                  */
 1510                                 if (maxsector == 0xffffffff) {
 1511                                         softc->state = DA_STATE_PROBE2;
 1512                                         free(rdcap, M_TEMP);
 1513                                         xpt_release_ccb(done_ccb);
 1514                                         xpt_schedule(periph, /*priority*/5);
 1515                                         return;
 1516                                 }
 1517                         } else {
 1518                                 block_size = scsi_4btoul(rcaplong->length);
 1519                                 maxsector = scsi_8btou64(rcaplong->addr);
 1520                         }
 1521                         dasetgeom(periph, block_size, maxsector);
 1522                         dp = &softc->params;
 1523                         snprintf(announce_buf, sizeof(announce_buf),
 1524                                 "%juMB (%ju %u byte sectors: %dH %dS/T %dC)",
 1525                                 (uintmax_t) (((uintmax_t)dp->secsize *
 1526                                 dp->sectors) / (1024*1024)),
 1527                                 (uintmax_t)dp->sectors,
 1528                                 dp->secsize, dp->heads, dp->secs_per_track,
 1529                                 dp->cylinders);
 1530                 } else {
 1531                         int     error;
 1532 
 1533                         announce_buf[0] = '\0';
 1534 
 1535                         /*
 1536                          * Retry any UNIT ATTENTION type errors.  They
 1537                          * are expected at boot.
 1538                          */
 1539                         error = daerror(done_ccb, CAM_RETRY_SELTO,
 1540                                         SF_RETRY_UA|SF_NO_PRINT);
 1541                         if (error == ERESTART) {
 1542                                 /*
 1543                                  * A retry was scheuled, so
 1544                                  * just return.
 1545                                  */
 1546                                 return;
 1547                         } else if (error != 0) {
 1548                                 struct scsi_sense_data *sense;
 1549                                 int asc, ascq;
 1550                                 int sense_key, error_code;
 1551                                 int have_sense;
 1552                                 cam_status status;
 1553                                 struct ccb_getdev cgd;
 1554 
 1555                                 /* Don't wedge this device's queue */
 1556                                 status = done_ccb->ccb_h.status;
 1557                                 if ((status & CAM_DEV_QFRZN) != 0)
 1558                                         cam_release_devq(done_ccb->ccb_h.path,
 1559                                                          /*relsim_flags*/0,
 1560                                                          /*reduction*/0,
 1561                                                          /*timeout*/0,
 1562                                                          /*getcount_only*/0);
 1563 
 1564 
 1565                                 xpt_setup_ccb(&cgd.ccb_h, 
 1566                                               done_ccb->ccb_h.path,
 1567                                               /* priority */ 1);
 1568                                 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
 1569                                 xpt_action((union ccb *)&cgd);
 1570 
 1571                                 if (((csio->ccb_h.flags & CAM_SENSE_PHYS) != 0)
 1572                                  || ((csio->ccb_h.flags & CAM_SENSE_PTR) != 0)
 1573                                  || ((status & CAM_AUTOSNS_VALID) == 0))
 1574                                         have_sense = FALSE;
 1575                                 else
 1576                                         have_sense = TRUE;
 1577 
 1578                                 if (have_sense) {
 1579                                         sense = &csio->sense_data;
 1580                                         scsi_extract_sense(sense, &error_code,
 1581                                                            &sense_key, 
 1582                                                            &asc, &ascq);
 1583                                 }
 1584                                 /*
 1585                                  * Attach to anything that claims to be a
 1586                                  * direct access or optical disk device,
 1587                                  * as long as it doesn't return a "Logical
 1588                                  * unit not supported" (0x25) error.
 1589                                  */
 1590                                 if ((have_sense) && (asc != 0x25)
 1591                                  && (error_code == SSD_CURRENT_ERROR)) {
 1592                                         const char *sense_key_desc;
 1593                                         const char *asc_desc;
 1594 
 1595                                         scsi_sense_desc(sense_key, asc, ascq,
 1596                                                         &cgd.inq_data,
 1597                                                         &sense_key_desc,
 1598                                                         &asc_desc);
 1599                                         snprintf(announce_buf,
 1600                                             sizeof(announce_buf),
 1601                                                 "Attempt to query device "
 1602                                                 "size failed: %s, %s",
 1603                                                 sense_key_desc,
 1604                                                 asc_desc);
 1605                                 } else { 
 1606                                         if (have_sense)
 1607                                                 scsi_sense_print(
 1608                                                         &done_ccb->csio);
 1609                                         else {
 1610                                                 xpt_print_path(periph->path);
 1611                                                 printf("got CAM status %#x\n",
 1612                                                        done_ccb->ccb_h.status);
 1613                                         }
 1614 
 1615                                         xpt_print_path(periph->path);
 1616                                         printf("fatal error, failed" 
 1617                                                " to attach to device\n");
 1618 
 1619                                         /*
 1620                                          * Free up resources.
 1621                                          */
 1622                                         cam_periph_invalidate(periph);
 1623                                 } 
 1624                         }
 1625                 }
 1626                 free(csio->data_ptr, M_TEMP);
 1627                 if (announce_buf[0] != '\0') {
 1628                         xpt_announce_periph(periph, announce_buf);
 1629                         /*
 1630                          * Create our sysctl variables, now that we know
 1631                          * we have successfully attached.
 1632                          */
 1633                         taskqueue_enqueue(taskqueue_thread,&softc->sysctl_task);
 1634                 }
 1635                 softc->state = DA_STATE_NORMAL; 
 1636                 /*
 1637                  * Since our peripheral may be invalidated by an error
 1638                  * above or an external event, we must release our CCB
 1639                  * before releasing the probe lock on the peripheral.
 1640                  * The peripheral will only go away once the last lock
 1641                  * is removed, and we need it around for the CCB release
 1642                  * operation.
 1643                  */
 1644                 xpt_release_ccb(done_ccb);
 1645                 cam_periph_unlock(periph);
 1646                 return;
 1647         }
 1648         case DA_CCB_WAITING:
 1649         {
 1650                 /* Caller will release the CCB */
 1651                 wakeup(&done_ccb->ccb_h.cbfcnp);
 1652                 return;
 1653         }
 1654         case DA_CCB_DUMP:
 1655                 /* No-op.  We're polling */
 1656                 return;
 1657         default:
 1658                 break;
 1659         }
 1660         xpt_release_ccb(done_ccb);
 1661 }
 1662 
 1663 static int
 1664 daerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 1665 {
 1666         struct da_softc   *softc;
 1667         struct cam_periph *periph;
 1668         int error;
 1669 
 1670         periph = xpt_path_periph(ccb->ccb_h.path);
 1671         softc = (struct da_softc *)periph->softc;
 1672 
 1673         /*
 1674          * Automatically detect devices that do not support
 1675          * READ(6)/WRITE(6) and upgrade to using 10 byte cdbs.
 1676          */
 1677         error = 0;
 1678         if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INVALID) {
 1679                 error = cmd6workaround(ccb);
 1680         } else if (((ccb->ccb_h.status & CAM_STATUS_MASK) ==
 1681                    CAM_SCSI_STATUS_ERROR)
 1682          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)
 1683          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
 1684          && ((ccb->ccb_h.flags & CAM_SENSE_PHYS) == 0)
 1685          && ((ccb->ccb_h.flags & CAM_SENSE_PTR) == 0)) {
 1686                 int sense_key, error_code, asc, ascq;
 1687 
 1688                 scsi_extract_sense(&ccb->csio.sense_data,
 1689                                    &error_code, &sense_key, &asc, &ascq);
 1690                 if (sense_key == SSD_KEY_ILLEGAL_REQUEST)
 1691                         error = cmd6workaround(ccb);
 1692         }
 1693         if (error == ERESTART)
 1694                 return (ERESTART);
 1695 
 1696         /*
 1697          * XXX
 1698          * Until we have a better way of doing pack validation,
 1699          * don't treat UAs as errors.
 1700          */
 1701         sense_flags |= SF_RETRY_UA;
 1702         return(cam_periph_error(ccb, cam_flags, sense_flags,
 1703                                 &softc->saved_ccb));
 1704 }
 1705 
 1706 static void
 1707 daprevent(struct cam_periph *periph, int action)
 1708 {
 1709         struct  da_softc *softc;
 1710         union   ccb *ccb;               
 1711         int     error;
 1712                 
 1713         softc = (struct da_softc *)periph->softc;
 1714 
 1715         if (((action == PR_ALLOW)
 1716           && (softc->flags & DA_FLAG_PACK_LOCKED) == 0)
 1717          || ((action == PR_PREVENT)
 1718           && (softc->flags & DA_FLAG_PACK_LOCKED) != 0)) {
 1719                 return;
 1720         }
 1721 
 1722         ccb = cam_periph_getccb(periph, /*priority*/1);
 1723 
 1724         scsi_prevent(&ccb->csio,
 1725                      /*retries*/1,
 1726                      /*cbcfp*/dadone,
 1727                      MSG_SIMPLE_Q_TAG,
 1728                      action,
 1729                      SSD_FULL_SIZE,
 1730                      5000);
 1731 
 1732         error = cam_periph_runccb(ccb, /*error_routine*/NULL, CAM_RETRY_SELTO,
 1733                                   SF_RETRY_UA, softc->disk->d_devstat);
 1734 
 1735         if (error == 0) {
 1736                 if (action == PR_ALLOW)
 1737                         softc->flags &= ~DA_FLAG_PACK_LOCKED;
 1738                 else
 1739                         softc->flags |= DA_FLAG_PACK_LOCKED;
 1740         }
 1741 
 1742         xpt_release_ccb(ccb);
 1743 }
 1744 
 1745 static int
 1746 dagetcapacity(struct cam_periph *periph)
 1747 {
 1748         struct da_softc *softc;
 1749         union ccb *ccb;
 1750         struct scsi_read_capacity_data *rcap;
 1751         struct scsi_read_capacity_data_long *rcaplong;
 1752         uint32_t block_len;
 1753         uint64_t maxsector;
 1754         int error;
 1755 
 1756         softc = (struct da_softc *)periph->softc;
 1757         block_len = 0;
 1758         maxsector = 0;
 1759         error = 0;
 1760 
 1761         /* Do a read capacity */
 1762         rcap = (struct scsi_read_capacity_data *)malloc(sizeof(*rcaplong),
 1763                                                         M_TEMP,
 1764                                                         M_WAITOK);
 1765                 
 1766         ccb = cam_periph_getccb(periph, /*priority*/1);
 1767         scsi_read_capacity(&ccb->csio,
 1768                            /*retries*/4,
 1769                            /*cbfncp*/dadone,
 1770                            MSG_SIMPLE_Q_TAG,
 1771                            rcap,
 1772                            SSD_FULL_SIZE,
 1773                            /*timeout*/60000);
 1774         ccb->ccb_h.ccb_bp = NULL;
 1775 
 1776         error = cam_periph_runccb(ccb, daerror,
 1777                                   /*cam_flags*/CAM_RETRY_SELTO,
 1778                                   /*sense_flags*/SF_RETRY_UA,
 1779                                   softc->disk->d_devstat);
 1780 
 1781         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 1782                 cam_release_devq(ccb->ccb_h.path,
 1783                                  /*relsim_flags*/0,
 1784                                  /*reduction*/0,
 1785                                  /*timeout*/0,
 1786                                  /*getcount_only*/0);
 1787 
 1788         if (error == 0) {
 1789                 block_len = scsi_4btoul(rcap->length);
 1790                 maxsector = scsi_4btoul(rcap->addr);
 1791 
 1792                 if (maxsector != 0xffffffff)
 1793                         goto done;
 1794         } else
 1795                 goto done;
 1796 
 1797         rcaplong = (struct scsi_read_capacity_data_long *)rcap;
 1798 
 1799         scsi_read_capacity_16(&ccb->csio,
 1800                               /*retries*/ 4,
 1801                               /*cbfcnp*/ dadone,
 1802                               /*tag_action*/ MSG_SIMPLE_Q_TAG,
 1803                               /*lba*/ 0,
 1804                               /*reladr*/ 0,
 1805                               /*pmi*/ 0,
 1806                               rcaplong,
 1807                               /*sense_len*/ SSD_FULL_SIZE,
 1808                               /*timeout*/ 60000);
 1809         ccb->ccb_h.ccb_bp = NULL;
 1810 
 1811         error = cam_periph_runccb(ccb, daerror,
 1812                                   /*cam_flags*/CAM_RETRY_SELTO,
 1813                                   /*sense_flags*/SF_RETRY_UA,
 1814                                   softc->disk->d_devstat);
 1815 
 1816         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 1817                 cam_release_devq(ccb->ccb_h.path,
 1818                                  /*relsim_flags*/0,
 1819                                  /*reduction*/0,
 1820                                  /*timeout*/0,
 1821                                  /*getcount_only*/0);
 1822 
 1823         if (error == 0) {
 1824                 block_len = scsi_4btoul(rcaplong->length);
 1825                 maxsector = scsi_8btou64(rcaplong->addr);
 1826         }
 1827 
 1828 done:
 1829 
 1830         if (error == 0)
 1831                 dasetgeom(periph, block_len, maxsector);
 1832 
 1833         xpt_release_ccb(ccb);
 1834 
 1835         free(rcap, M_TEMP);
 1836 
 1837         return (error);
 1838 }
 1839 
 1840 static void
 1841 dasetgeom(struct cam_periph *periph, uint32_t block_len, uint64_t maxsector)
 1842 {
 1843         struct ccb_calc_geometry ccg;
 1844         struct da_softc *softc;
 1845         struct disk_params *dp;
 1846 
 1847         softc = (struct da_softc *)periph->softc;
 1848 
 1849         dp = &softc->params;
 1850         dp->secsize = block_len;
 1851         dp->sectors = maxsector + 1;
 1852         /*
 1853          * Have the controller provide us with a geometry
 1854          * for this disk.  The only time the geometry
 1855          * matters is when we boot and the controller
 1856          * is the only one knowledgeable enough to come
 1857          * up with something that will make this a bootable
 1858          * device.
 1859          */
 1860         xpt_setup_ccb(&ccg.ccb_h, periph->path, /*priority*/1);
 1861         ccg.ccb_h.func_code = XPT_CALC_GEOMETRY;
 1862         ccg.block_size = dp->secsize;
 1863         ccg.volume_size = dp->sectors;
 1864         ccg.heads = 0;
 1865         ccg.secs_per_track = 0;
 1866         ccg.cylinders = 0;
 1867         xpt_action((union ccb*)&ccg);
 1868         dp->heads = ccg.heads;
 1869         dp->secs_per_track = ccg.secs_per_track;
 1870         dp->cylinders = ccg.cylinders;
 1871 }
 1872 
 1873 static void
 1874 dasendorderedtag(void *arg)
 1875 {
 1876         struct da_softc *softc;
 1877         int s;
 1878 
 1879         for (softc = SLIST_FIRST(&softc_list);
 1880              softc != NULL;
 1881              softc = SLIST_NEXT(softc, links)) {
 1882                 s = splsoftcam();
 1883                 if ((softc->ordered_tag_count == 0) 
 1884                  && ((softc->flags & DA_FLAG_WENT_IDLE) == 0)) {
 1885                         softc->flags |= DA_FLAG_NEED_OTAG;
 1886                 }
 1887                 if (softc->outstanding_cmds > 0)
 1888                         softc->flags &= ~DA_FLAG_WENT_IDLE;
 1889 
 1890                 softc->ordered_tag_count = 0;
 1891                 splx(s);
 1892         }
 1893         /* Queue us up again */
 1894         timeout(dasendorderedtag, NULL,
 1895                 (da_default_timeout * hz) / DA_ORDEREDTAG_INTERVAL);
 1896 }
 1897 
 1898 /*
 1899  * Step through all DA peripheral drivers, and if the device is still open,
 1900  * sync the disk cache to physical media.
 1901  */
 1902 static void
 1903 dashutdown(void * arg, int howto)
 1904 {
 1905         struct cam_periph *periph;
 1906         struct da_softc *softc;
 1907 
 1908         TAILQ_FOREACH(periph, &dadriver.units, unit_links) {
 1909                 union ccb ccb;
 1910                 softc = (struct da_softc *)periph->softc;
 1911 
 1912                 /*
 1913                  * We only sync the cache if the drive is still open, and
 1914                  * if the drive is capable of it..
 1915                  */
 1916                 if (((softc->flags & DA_FLAG_OPEN) == 0)
 1917                  || (softc->quirks & DA_Q_NO_SYNC_CACHE))
 1918                         continue;
 1919 
 1920                 xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/1);
 1921 
 1922                 ccb.ccb_h.ccb_state = DA_CCB_DUMP;
 1923                 scsi_synchronize_cache(&ccb.csio,
 1924                                        /*retries*/1,
 1925                                        /*cbfcnp*/dadone,
 1926                                        MSG_SIMPLE_Q_TAG,
 1927                                        /*begin_lba*/0, /* whole disk */
 1928                                        /*lb_count*/0,
 1929                                        SSD_FULL_SIZE,
 1930                                        60 * 60 * 1000);
 1931 
 1932                 xpt_polled_action(&ccb);
 1933 
 1934                 if ((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 1935                         if (((ccb.ccb_h.status & CAM_STATUS_MASK) ==
 1936                              CAM_SCSI_STATUS_ERROR)
 1937                          && (ccb.csio.scsi_status == SCSI_STATUS_CHECK_COND)){
 1938                                 int error_code, sense_key, asc, ascq;
 1939 
 1940                                 scsi_extract_sense(&ccb.csio.sense_data,
 1941                                                    &error_code, &sense_key,
 1942                                                    &asc, &ascq);
 1943 
 1944                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
 1945                                         scsi_sense_print(&ccb.csio);
 1946                         } else {
 1947                                 xpt_print_path(periph->path);
 1948                                 printf("Synchronize cache failed, status "
 1949                                        "== 0x%x, scsi status == 0x%x\n",
 1950                                        ccb.ccb_h.status, ccb.csio.scsi_status);
 1951                         }
 1952                 }
 1953 
 1954                 if ((ccb.ccb_h.status & CAM_DEV_QFRZN) != 0)
 1955                         cam_release_devq(ccb.ccb_h.path,
 1956                                          /*relsim_flags*/0,
 1957                                          /*reduction*/0,
 1958                                          /*timeout*/0,
 1959                                          /*getcount_only*/0);
 1960 
 1961         }
 1962 }
 1963 
 1964 #else /* !_KERNEL */
 1965 
 1966 /*
 1967  * XXX This is only left out of the kernel build to silence warnings.  If,
 1968  * for some reason this function is used in the kernel, the ifdefs should
 1969  * be moved so it is included both in the kernel and userland.
 1970  */
 1971 void
 1972 scsi_format_unit(struct ccb_scsiio *csio, u_int32_t retries,
 1973                  void (*cbfcnp)(struct cam_periph *, union ccb *),
 1974                  u_int8_t tag_action, u_int8_t byte2, u_int16_t ileave,
 1975                  u_int8_t *data_ptr, u_int32_t dxfer_len, u_int8_t sense_len,
 1976                  u_int32_t timeout)
 1977 {
 1978         struct scsi_format_unit *scsi_cmd;
 1979 
 1980         scsi_cmd = (struct scsi_format_unit *)&csio->cdb_io.cdb_bytes;
 1981         scsi_cmd->opcode = FORMAT_UNIT;
 1982         scsi_cmd->byte2 = byte2;
 1983         scsi_ulto2b(ileave, scsi_cmd->interleave);
 1984 
 1985         cam_fill_csio(csio,
 1986                       retries,
 1987                       cbfcnp,
 1988                       /*flags*/ (dxfer_len > 0) ? CAM_DIR_OUT : CAM_DIR_NONE,
 1989                       tag_action,
 1990                       data_ptr,
 1991                       dxfer_len,
 1992                       sense_len,
 1993                       sizeof(*scsi_cmd),
 1994                       timeout);
 1995 }
 1996 
 1997 #endif /* _KERNEL */

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