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("$FreeBSD$");
   31 
   32 #include <sys/param.h>
   33 
   34 #ifdef _KERNEL
   35 #include <sys/systm.h>
   36 #include <sys/kernel.h>
   37 #include <sys/bio.h>
   38 #include <sys/sysctl.h>
   39 #include <sys/taskqueue.h>
   40 #include <sys/lock.h>
   41 #include <sys/mutex.h>
   42 #include <sys/conf.h>
   43 #include <sys/devicestat.h>
   44 #include <sys/eventhandler.h>
   45 #include <sys/malloc.h>
   46 #include <sys/cons.h>
   47 #include <geom/geom_disk.h>
   48 #endif /* _KERNEL */
   49 
   50 #ifndef _KERNEL
   51 #include <stdio.h>
   52 #include <string.h>
   53 #endif /* _KERNEL */
   54 
   55 #include <cam/cam.h>
   56 #include <cam/cam_ccb.h>
   57 #include <cam/cam_periph.h>
   58 #include <cam/cam_xpt_periph.h>
   59 #include <cam/cam_sim.h>
   60 
   61 #include <cam/scsi/scsi_message.h>
   62 
   63 #ifndef _KERNEL 
   64 #include <cam/scsi/scsi_da.h>
   65 #endif /* !_KERNEL */
   66 
   67 #ifdef _KERNEL
   68 typedef enum {
   69         DA_STATE_PROBE,
   70         DA_STATE_PROBE2,
   71         DA_STATE_NORMAL
   72 } da_state;
   73 
   74 typedef enum {
   75         DA_FLAG_PACK_INVALID    = 0x001,
   76         DA_FLAG_NEW_PACK        = 0x002,
   77         DA_FLAG_PACK_LOCKED     = 0x004,
   78         DA_FLAG_PACK_REMOVABLE  = 0x008,
   79         DA_FLAG_TAGGED_QUEUING  = 0x010,
   80         DA_FLAG_NEED_OTAG       = 0x020,
   81         DA_FLAG_WENT_IDLE       = 0x040,
   82         DA_FLAG_RETRY_UA        = 0x080,
   83         DA_FLAG_OPEN            = 0x100,
   84         DA_FLAG_SCTX_INIT       = 0x200
   85 } da_flags;
   86 
   87 typedef enum {
   88         DA_Q_NONE               = 0x00,
   89         DA_Q_NO_SYNC_CACHE      = 0x01,
   90         DA_Q_NO_6_BYTE          = 0x02,
   91         DA_Q_NO_PREVENT         = 0x04
   92 } da_quirks;
   93 
   94 typedef enum {
   95         DA_CCB_PROBE            = 0x01,
   96         DA_CCB_PROBE2           = 0x02,
   97         DA_CCB_BUFFER_IO        = 0x03,
   98         DA_CCB_WAITING          = 0x04,
   99         DA_CCB_DUMP             = 0x05,
  100         DA_CCB_TYPE_MASK        = 0x0F,
  101         DA_CCB_RETRY_UA         = 0x10
  102 } da_ccb_state;
  103 
  104 /* Offsets into our private area for storing information */
  105 #define ccb_state       ppriv_field0
  106 #define ccb_bp          ppriv_ptr1
  107 
  108 struct disk_params {
  109         u_int8_t  heads;
  110         u_int32_t cylinders;
  111         u_int8_t  secs_per_track;
  112         u_int32_t secsize;      /* Number of bytes/sector */
  113         u_int64_t sectors;      /* total number sectors */
  114 };
  115 
  116 struct da_softc {
  117         struct   bio_queue_head bio_queue;
  118         SLIST_ENTRY(da_softc) links;
  119         LIST_HEAD(, ccb_hdr) pending_ccbs;
  120         da_state state;
  121         da_flags flags; 
  122         da_quirks quirks;
  123         int      minimum_cmd_size;
  124         int      ordered_tag_count;
  125         int      outstanding_cmds;
  126         struct   disk_params params;
  127         struct   disk *disk;
  128         union    ccb saved_ccb;
  129         struct task             sysctl_task;
  130         struct sysctl_ctx_list  sysctl_ctx;
  131         struct sysctl_oid       *sysctl_tree;
  132         struct callout          sendordered_c;
  133 };
  134 
  135 struct da_quirk_entry {
  136         struct scsi_inquiry_pattern inq_pat;
  137         da_quirks quirks;
  138 };
  139 
  140 static const char quantum[] = "QUANTUM";
  141 static const char microp[] = "MICROP";
  142 
  143 static struct da_quirk_entry da_quirk_table[] =
  144 {
  145         /* SPI, FC devices */
  146         {
  147                 /*
  148                  * Fujitsu M2513A MO drives.
  149                  * Tested devices: M2513A2 firmware versions 1200 & 1300.
  150                  * (dip switch selects whether T_DIRECT or T_OPTICAL device)
  151                  * Reported by: W.Scholten <whs@xs4all.nl>
  152                  */
  153                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
  154                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  155         },
  156         {
  157                 /* See above. */
  158                 {T_OPTICAL, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
  159                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  160         },
  161         {
  162                 /*
  163                  * This particular Fujitsu drive doesn't like the
  164                  * synchronize cache command.
  165                  * Reported by: Tom Jackson <toj@gorilla.net>
  166                  */
  167                 {T_DIRECT, SIP_MEDIA_FIXED, "FUJITSU", "M2954*", "*"},
  168                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  169         },
  170         {
  171                 /*
  172                  * This drive doesn't like the synchronize cache command
  173                  * either.  Reported by: Matthew Jacob <mjacob@feral.com>
  174                  * in NetBSD PR kern/6027, August 24, 1998.
  175                  */
  176                 {T_DIRECT, SIP_MEDIA_FIXED, microp, "2217*", "*"},
  177                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  178         },
  179         {
  180                 /*
  181                  * This drive doesn't like the synchronize cache command
  182                  * either.  Reported by: Hellmuth Michaelis (hm@kts.org)
  183                  * (PR 8882).
  184                  */
  185                 {T_DIRECT, SIP_MEDIA_FIXED, microp, "2112*", "*"},
  186                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  187         },
  188         {
  189                 /*
  190                  * Doesn't like the synchronize cache command.
  191                  * Reported by: Blaz Zupan <blaz@gold.amis.net>
  192                  */
  193                 {T_DIRECT, SIP_MEDIA_FIXED, "NEC", "D3847*", "*"},
  194                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  195         },
  196         {
  197                 /*
  198                  * Doesn't like the synchronize cache command.
  199                  * Reported by: Blaz Zupan <blaz@gold.amis.net>
  200                  */
  201                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "MAVERICK 540S", "*"},
  202                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  203         },
  204         {
  205                 /*
  206                  * Doesn't like the synchronize cache command.
  207                  */
  208                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS525S", "*"},
  209                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  210         },
  211         {
  212                 /*
  213                  * Doesn't like the synchronize cache command.
  214                  * Reported by: walter@pelissero.de
  215                  */
  216                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS540S", "*"},
  217                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  218         },
  219         {
  220                 /*
  221                  * Doesn't work correctly with 6 byte reads/writes.
  222                  * Returns illegal request, and points to byte 9 of the
  223                  * 6-byte CDB.
  224                  * Reported by:  Adam McDougall <bsdx@spawnet.com>
  225                  */
  226                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 4*", "*"},
  227                 /*quirks*/ DA_Q_NO_6_BYTE
  228         },
  229         {
  230                 /* See above. */
  231                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 2*", "*"},
  232                 /*quirks*/ DA_Q_NO_6_BYTE
  233         },
  234         {
  235                 /*
  236                  * Doesn't like the synchronize cache command.
  237                  * Reported by: walter@pelissero.de
  238                  */
  239                 {T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CP3500*", "*"},
  240                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  241         },
  242         {
  243                 /*
  244                  * The CISS RAID controllers do not support SYNC_CACHE
  245                  */
  246                 {T_DIRECT, SIP_MEDIA_FIXED, "COMPAQ", "RAID*", "*"},
  247                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  248         },
  249         /* USB mass storage devices supported by umass(4) */
  250         {
  251                 /*
  252                  * EXATELECOM (Sigmatel) i-Bead 100/105 USB Flash MP3 Player
  253                  * PR: kern/51675
  254                  */
  255                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "EXATEL", "i-BEAD10*", "*"},
  256                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  257         },
  258         {
  259                 /*
  260                  * Power Quotient Int. (PQI) USB flash key
  261                  * PR: kern/53067
  262                  */
  263                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "Generic*", "USB Flash Disk*",
  264                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  265         },
  266         {
  267                 /*
  268                  * Creative Nomad MUVO mp3 player (USB)
  269                  * PR: kern/53094
  270                  */
  271                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "NOMAD_MUVO", "*"},
  272                 /*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
  273         },
  274         {
  275                 /*
  276                  * Jungsoft NEXDISK USB flash key
  277                  * PR: kern/54737
  278                  */
  279                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "JUNGSOFT", "NEXDISK*", "*"},
  280                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  281         },
  282         {
  283                 /*
  284                  * FreeDik USB Mini Data Drive
  285                  * PR: kern/54786
  286                  */
  287                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "FreeDik*", "Mini Data Drive",
  288                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  289         },
  290         {
  291                 /*
  292                  * Sigmatel USB Flash MP3 Player
  293                  * PR: kern/57046
  294                  */
  295                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "SigmaTel", "MSCN", "*"},
  296                 /*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
  297         },
  298         {
  299                 /*
  300                  * Neuros USB Digital Audio Computer
  301                  * PR: kern/63645
  302                  */
  303                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "NEUROS", "dig. audio comp.",
  304                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  305         },
  306         {
  307                 /*
  308                  * SEAGRAND NP-900 MP3 Player
  309                  * PR: kern/64563
  310                  */
  311                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "SEAGRAND", "NP-900*", "*"},
  312                 /*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
  313         },
  314         {
  315                 /*
  316                  * iRiver iFP MP3 player (with UMS Firmware)
  317                  * PR: kern/54881, i386/63941, kern/66124
  318                  */
  319                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "iRiver", "iFP*", "*"},
  320                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  321         },
  322         {
  323                 /*
  324                  * Frontier Labs NEX IA+ Digital Audio Player, rev 1.10/0.01
  325                  * PR: kern/70158
  326                  */
  327                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "FL" , "Nex*", "*"},
  328                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  329         },
  330         {
  331                 /*
  332                  * ZICPlay USB MP3 Player with FM
  333                  * PR: kern/75057
  334                  */
  335                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "ACTIONS*" , "USB DISK*", "*"},
  336                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  337         },
  338         {
  339                 /*
  340                  * TEAC USB floppy mechanisms
  341                  */
  342                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "TEAC" , "FD-05*", "*"},
  343                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  344         },
  345         {
  346                 /*
  347                  * Kingston DataTraveler II+ USB Pen-Drive.
  348                  * Reported by: Pawel Jakub Dawidek <pjd@FreeBSD.org>
  349                  */
  350                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "Kingston" , "DataTraveler II+",
  351                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  352         },
  353         {
  354                 /*
  355                  * Motorola E398 Mobile Phone (TransFlash memory card).
  356                  * Reported by: Wojciech A. Koszek <dunstan@FreeBSD.czest.pl>
  357                  * PR: usb/89889
  358                  */
  359                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "Motorola" , "Motorola Phone",
  360                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  361         },
  362         {
  363                 /*
  364                  * Qware BeatZkey! Pro
  365                  * PR: usb/79164
  366                  */
  367                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "GENERIC", "USB DISK DEVICE",
  368                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  369         },
  370         {
  371                 /*
  372                  * Time DPA20B 1GB MP3 Player
  373                  * PR: usb/81846
  374                  */
  375                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "USB2.0*", "(FS) FLASH DISK*",
  376                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  377         },
  378         {
  379                 /*
  380                  * Samsung USB key 128Mb
  381                  * PR: usb/90081
  382                  */
  383                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "USB-DISK", "FreeDik-FlashUsb",
  384                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  385         },
  386         {
  387                 /*
  388                  * Kingston DataTraveler 2.0 USB Flash memory.
  389                  * PR: usb/89196
  390                  */
  391                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "Kingston", "DataTraveler 2.0",
  392                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  393         },
  394         {
  395                 /*
  396                  * Creative MUVO Slim mp3 player (USB)
  397                  * PR: usb/86131
  398                  */
  399                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "MuVo Slim",
  400                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
  401                 },
  402         {
  403                 /*
  404                  * United MP5512 Portable MP3 Player (2-in-1 USB DISK/MP3)
  405                  * PR: usb/80487
  406                  */
  407                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "Generic*", "MUSIC DISK",
  408                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  409         },
  410         {
  411                 /*
  412                  * SanDisk Micro Cruzer 128MB
  413                  * PR: usb/75970
  414                  */
  415                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "SanDisk" , "Micro Cruzer",
  416                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  417         },
  418         {
  419                 /*
  420                  * TOSHIBA TransMemory USB sticks
  421                  * PR: kern/94660
  422                  */
  423                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "TOSHIBA", "TransMemory",
  424                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  425         },
  426         {
  427                 /*
  428                  * PNY USB Flash keys
  429                  * PR: usb/75578, usb/72344, usb/65436 
  430                  */
  431                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "*" , "USB DISK*",
  432                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  433         },
  434         {
  435                 /*
  436                  * Genesys 6-in-1 Card Reader
  437                  * PR: usb/94647
  438                  */
  439                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "Generic*", "STORAGE DEVICE*",
  440                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  441         },
  442         {
  443                 /*
  444                  * Rekam Digital CAMERA
  445                  * PR: usb/98713
  446                  */
  447                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "CAMERA*", "4MP-9J6*",
  448                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  449         },
  450         {
  451                 /*
  452                  * iRiver H10 MP3 player
  453                  * PR: usb/102547
  454                  */
  455                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "iriver", "H10*",
  456                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  457         },
  458         {
  459                 /*
  460                  * iRiver U10 MP3 player
  461                  * PR: usb/92306
  462                  */
  463                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "iriver", "U10*",
  464                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  465         },
  466         {
  467                 /*
  468                  * X-Micro Flash Disk
  469                  * PR: usb/96901
  470                  */
  471                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "X-Micro", "Flash Disk",
  472                 "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  473         },
  474         {
  475                 /*
  476                  * EasyMP3 EM732X USB 2.0 Flash MP3 Player
  477                  * PR: usb/96546
  478                  */
  479                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "EM732X", "MP3 Player*",
  480                 "1.00"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  481         },
  482         {
  483                 /*
  484                  * Denver MP3 player
  485                  * PR: usb/107101
  486                  */
  487                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "DENVER", "MP3 PLAYER",
  488                  "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  489         },
  490         {
  491                 /*
  492                  * Philips USB Key Audio KEY013
  493                  * PR: usb/68412
  494                  */
  495                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "PHILIPS", "Key*", "*"},
  496                 /*quirks*/ DA_Q_NO_SYNC_CACHE | DA_Q_NO_PREVENT
  497         },
  498         {
  499                 /*
  500                  * JNC MP3 Player
  501                  * PR: usb/94439
  502                  */
  503                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "JNC*" , "MP3 Player*",
  504                  "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  505         },
  506         {
  507                 /*
  508                  * SAMSUNG MP0402H
  509                  * PR: usb/108427
  510                  */
  511                 {T_DIRECT, SIP_MEDIA_FIXED, "SAMSUNG", "MP0402H", "*"},
  512                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  513         },
  514         {
  515                 /*
  516                  * I/O Magic USB flash - Giga Bank
  517                  * PR: usb/108810
  518                  */
  519                 {T_DIRECT, SIP_MEDIA_FIXED, "GS-Magic", "stor*", "*"},
  520                 /*quirks*/ DA_Q_NO_SYNC_CACHE
  521         },
  522         {
  523                 /*
  524                  * JoyFly 128mb USB Flash Drive
  525                  * PR: 96133
  526                  */
  527                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "USB 2.0", "Flash Disk*",
  528                  "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  529         },
  530         {
  531                 /*
  532                  * ChipsBnk usb stick
  533                  * PR: 103702
  534                  */
  535                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "ChipsBnk", "USB*",
  536                  "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  537         },
  538         {
  539                 /*
  540                  * Samsung YP-U3 mp3-player
  541                  * PR: 125398
  542                  */
  543                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "Samsung", "YP-U3",
  544                  "*"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  545         },
  546         {
  547                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "Netac", "OnlyDisk*",
  548                  "2000"}, /*quirks*/ DA_Q_NO_SYNC_CACHE
  549         }
  550 };
  551 
  552 static  disk_strategy_t dastrategy;
  553 static  dumper_t        dadump;
  554 static  periph_init_t   dainit;
  555 static  void            daasync(void *callback_arg, u_int32_t code,
  556                                 struct cam_path *path, void *arg);
  557 static  void            dasysctlinit(void *context, int pending);
  558 static  int             dacmdsizesysctl(SYSCTL_HANDLER_ARGS);
  559 static  periph_ctor_t   daregister;
  560 static  periph_dtor_t   dacleanup;
  561 static  periph_start_t  dastart;
  562 static  periph_oninv_t  daoninvalidate;
  563 static  void            dadone(struct cam_periph *periph,
  564                                union ccb *done_ccb);
  565 static  int             daerror(union ccb *ccb, u_int32_t cam_flags,
  566                                 u_int32_t sense_flags);
  567 static void             daprevent(struct cam_periph *periph, int action);
  568 static int              dagetcapacity(struct cam_periph *periph);
  569 static void             dasetgeom(struct cam_periph *periph, uint32_t block_len,
  570                                   uint64_t maxsector);
  571 static timeout_t        dasendorderedtag;
  572 static void             dashutdown(void *arg, int howto);
  573 
  574 #ifndef DA_DEFAULT_TIMEOUT
  575 #define DA_DEFAULT_TIMEOUT 60   /* Timeout in seconds */
  576 #endif
  577 
  578 #ifndef DA_DEFAULT_RETRY
  579 #define DA_DEFAULT_RETRY        4
  580 #endif
  581 
  582 #ifndef DA_DEFAULT_SEND_ORDERED
  583 #define DA_DEFAULT_SEND_ORDERED 1
  584 #endif
  585 
  586 
  587 static int da_retry_count = DA_DEFAULT_RETRY;
  588 static int da_default_timeout = DA_DEFAULT_TIMEOUT;
  589 static int da_send_ordered = DA_DEFAULT_SEND_ORDERED;
  590 
  591 SYSCTL_NODE(_kern_cam, OID_AUTO, da, CTLFLAG_RD, 0,
  592             "CAM Direct Access Disk driver");
  593 SYSCTL_INT(_kern_cam_da, OID_AUTO, retry_count, CTLFLAG_RW,
  594            &da_retry_count, 0, "Normal I/O retry count");
  595 TUNABLE_INT("kern.cam.da.retry_count", &da_retry_count);
  596 SYSCTL_INT(_kern_cam_da, OID_AUTO, default_timeout, CTLFLAG_RW,
  597            &da_default_timeout, 0, "Normal I/O timeout (in seconds)");
  598 TUNABLE_INT("kern.cam.da.default_timeout", &da_default_timeout);
  599 SYSCTL_INT(_kern_cam_da, OID_AUTO, da_send_ordered, CTLFLAG_RW,
  600            &da_send_ordered, 0, "Send Ordered Tags");
  601 TUNABLE_INT("kern.cam.da.da_send_ordered", &da_send_ordered);
  602 
  603 /*
  604  * DA_ORDEREDTAG_INTERVAL determines how often, relative
  605  * to the default timeout, we check to see whether an ordered
  606  * tagged transaction is appropriate to prevent simple tag
  607  * starvation.  Since we'd like to ensure that there is at least
  608  * 1/2 of the timeout length left for a starved transaction to
  609  * complete after we've sent an ordered tag, we must poll at least
  610  * four times in every timeout period.  This takes care of the worst
  611  * case where a starved transaction starts during an interval that
  612  * meets the requirement "don't send an ordered tag" test so it takes
  613  * us two intervals to determine that a tag must be sent.
  614  */
  615 #ifndef DA_ORDEREDTAG_INTERVAL
  616 #define DA_ORDEREDTAG_INTERVAL 4
  617 #endif
  618 
  619 static struct periph_driver dadriver =
  620 {
  621         dainit, "da",
  622         TAILQ_HEAD_INITIALIZER(dadriver.units), /* generation */ 0
  623 };
  624 
  625 PERIPHDRIVER_DECLARE(da, dadriver);
  626 
  627 MALLOC_DEFINE(M_SCSIDA, "scsi_da", "scsi_da buffers");
  628 
  629 static int
  630 daopen(struct disk *dp)
  631 {
  632         struct cam_periph *periph;
  633         struct da_softc *softc;
  634         int unit;
  635         int error;
  636 
  637         periph = (struct cam_periph *)dp->d_drv1;
  638         if (periph == NULL) {
  639                 return (ENXIO); 
  640         }
  641 
  642         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
  643                 return(ENXIO);
  644         }
  645 
  646         cam_periph_lock(periph);
  647         if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) {
  648                 cam_periph_unlock(periph);
  649                 cam_periph_release(periph);
  650                 return (error);
  651         }
  652 
  653         unit = periph->unit_number;
  654         softc = (struct da_softc *)periph->softc;
  655         softc->flags |= DA_FLAG_OPEN;
  656 
  657         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
  658             ("daopen: disk=%s%d (unit %d)\n", dp->d_name, dp->d_unit,
  659              unit));
  660 
  661         if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
  662                 /* Invalidate our pack information. */
  663                 softc->flags &= ~DA_FLAG_PACK_INVALID;
  664         }
  665 
  666         error = dagetcapacity(periph);
  667 
  668         if (error == 0) {
  669 
  670                 softc->disk->d_sectorsize = softc->params.secsize;
  671                 softc->disk->d_mediasize = softc->params.secsize * (off_t)softc->params.sectors;
  672                 /* XXX: these are not actually "firmware" values, so they may be wrong */
  673                 softc->disk->d_fwsectors = softc->params.secs_per_track;
  674                 softc->disk->d_fwheads = softc->params.heads;
  675                 softc->disk->d_devstat->block_size = softc->params.secsize;
  676                 softc->disk->d_devstat->flags &= ~DEVSTAT_BS_UNAVAILABLE;
  677         }
  678         
  679         if (error == 0) {
  680                 if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0 &&
  681                     (softc->quirks & DA_Q_NO_PREVENT) == 0)
  682                         daprevent(periph, PR_PREVENT);
  683         } else {
  684                 softc->flags &= ~DA_FLAG_OPEN;
  685                 cam_periph_release(periph);
  686         }
  687         cam_periph_unhold(periph);
  688         cam_periph_unlock(periph);
  689         return (error);
  690 }
  691 
  692 static int
  693 daclose(struct disk *dp)
  694 {
  695         struct  cam_periph *periph;
  696         struct  da_softc *softc;
  697         int error;
  698 
  699         periph = (struct cam_periph *)dp->d_drv1;
  700         if (periph == NULL)
  701                 return (ENXIO); 
  702 
  703         cam_periph_lock(periph);
  704         if ((error = cam_periph_hold(periph, PRIBIO)) != 0) {
  705                 cam_periph_unlock(periph);
  706                 cam_periph_release(periph);
  707                 return (error);
  708         }
  709 
  710         softc = (struct da_softc *)periph->softc;
  711 
  712         if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
  713                 union   ccb *ccb;
  714 
  715                 ccb = cam_periph_getccb(periph, /*priority*/1);
  716 
  717                 scsi_synchronize_cache(&ccb->csio,
  718                                        /*retries*/1,
  719                                        /*cbfcnp*/dadone,
  720                                        MSG_SIMPLE_Q_TAG,
  721                                        /*begin_lba*/0,/* Cover the whole disk */
  722                                        /*lb_count*/0,
  723                                        SSD_FULL_SIZE,
  724                                        5 * 60 * 1000);
  725 
  726                 cam_periph_runccb(ccb, /*error_routine*/NULL, /*cam_flags*/0,
  727                                   /*sense_flags*/SF_RETRY_UA,
  728                                   softc->disk->d_devstat);
  729 
  730                 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
  731                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) ==
  732                              CAM_SCSI_STATUS_ERROR) {
  733                                 int asc, ascq;
  734                                 int sense_key, error_code;
  735 
  736                                 scsi_extract_sense(&ccb->csio.sense_data,
  737                                                    &error_code,
  738                                                    &sense_key, 
  739                                                    &asc, &ascq);
  740                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
  741                                         scsi_sense_print(&ccb->csio);
  742                         } else {
  743                                 xpt_print(periph->path, "Synchronize cache "
  744                                     "failed, status == 0x%x, scsi status == "
  745                                     "0x%x\n", ccb->csio.ccb_h.status,
  746                                     ccb->csio.scsi_status);
  747                         }
  748                 }
  749 
  750                 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
  751                         cam_release_devq(ccb->ccb_h.path,
  752                                          /*relsim_flags*/0,
  753                                          /*reduction*/0,
  754                                          /*timeout*/0,
  755                                          /*getcount_only*/0);
  756 
  757                 xpt_release_ccb(ccb);
  758 
  759         }
  760 
  761         if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0) {
  762                 if ((softc->quirks & DA_Q_NO_PREVENT) == 0)
  763                         daprevent(periph, PR_ALLOW);
  764                 /*
  765                  * If we've got removeable media, mark the blocksize as
  766                  * unavailable, since it could change when new media is
  767                  * inserted.
  768                  */
  769                 softc->disk->d_devstat->flags |= DEVSTAT_BS_UNAVAILABLE;
  770         }
  771 
  772         softc->flags &= ~DA_FLAG_OPEN;
  773         cam_periph_unhold(periph);
  774         cam_periph_release(periph);
  775         cam_periph_unlock(periph);
  776         return (0);     
  777 }
  778 
  779 /*
  780  * Actually translate the requested transfer into one the physical driver
  781  * can understand.  The transfer is described by a buf and will include
  782  * only one physical transfer.
  783  */
  784 static void
  785 dastrategy(struct bio *bp)
  786 {
  787         struct cam_periph *periph;
  788         struct da_softc *softc;
  789         
  790         periph = (struct cam_periph *)bp->bio_disk->d_drv1;
  791         if (periph == NULL) {
  792                 biofinish(bp, NULL, ENXIO);
  793                 return;
  794         }
  795         softc = (struct da_softc *)periph->softc;
  796 
  797         cam_periph_lock(periph);
  798 
  799 #if 0
  800         /*
  801          * check it's not too big a transfer for our adapter
  802          */
  803         scsi_minphys(bp,&sd_switch);
  804 #endif
  805 
  806         /*
  807          * Mask interrupts so that the pack cannot be invalidated until
  808          * after we are in the queue.  Otherwise, we might not properly
  809          * clean up one of the buffers.
  810          */
  811         
  812         /*
  813          * If the device has been made invalid, error out
  814          */
  815         if ((softc->flags & DA_FLAG_PACK_INVALID)) {
  816                 cam_periph_unlock(periph);
  817                 biofinish(bp, NULL, ENXIO);
  818                 return;
  819         }
  820         
  821         /*
  822          * Place it in the queue of disk activities for this disk
  823          */
  824         bioq_disksort(&softc->bio_queue, bp);
  825 
  826         /*
  827          * Schedule ourselves for performing the work.
  828          */
  829         xpt_schedule(periph, /* XXX priority */1);
  830         cam_periph_unlock(periph);
  831 
  832         return;
  833 }
  834 
  835 static int
  836 dadump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
  837 {
  838         struct      cam_periph *periph;
  839         struct      da_softc *softc;
  840         u_int       secsize;
  841         struct      ccb_scsiio csio;
  842         struct      disk *dp;
  843 
  844         dp = arg;
  845         periph = dp->d_drv1;
  846         if (periph == NULL)
  847                 return (ENXIO);
  848         softc = (struct da_softc *)periph->softc;
  849         cam_periph_lock(periph);
  850         secsize = softc->params.secsize;
  851         
  852         if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
  853                 cam_periph_unlock(periph);
  854                 return (ENXIO);
  855         }
  856 
  857         if (length > 0) {
  858                 periph->flags |= CAM_PERIPH_POLLED;
  859                 xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
  860                 csio.ccb_h.ccb_state = DA_CCB_DUMP;
  861                 scsi_read_write(&csio,
  862                                 /*retries*/1,
  863                                 dadone,
  864                                 MSG_ORDERED_Q_TAG,
  865                                 /*read*/FALSE,
  866                                 /*byte2*/0,
  867                                 /*minimum_cmd_size*/ softc->minimum_cmd_size,
  868                                 offset / secsize,
  869                                 length / secsize,
  870                                 /*data_ptr*/(u_int8_t *) virtual,
  871                                 /*dxfer_len*/length,
  872                                 /*sense_len*/SSD_FULL_SIZE,
  873                                 DA_DEFAULT_TIMEOUT * 1000);             
  874                 xpt_polled_action((union ccb *)&csio);
  875 
  876                 if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
  877                         printf("Aborting dump due to I/O error.\n");
  878                         if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
  879                              CAM_SCSI_STATUS_ERROR)
  880                                 scsi_sense_print(&csio);
  881                         else
  882                                 printf("status == 0x%x, scsi status == 0x%x\n",
  883                                        csio.ccb_h.status, csio.scsi_status);
  884                         periph->flags |= CAM_PERIPH_POLLED;
  885                         return(EIO);
  886                 }
  887                 cam_periph_unlock(periph);
  888                 return(0);
  889         }
  890                 
  891         /*
  892          * Sync the disk cache contents to the physical media.
  893          */
  894         if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
  895 
  896                 xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
  897                 csio.ccb_h.ccb_state = DA_CCB_DUMP;
  898                 scsi_synchronize_cache(&csio,
  899                                        /*retries*/1,
  900                                        /*cbfcnp*/dadone,
  901                                        MSG_SIMPLE_Q_TAG,
  902                                        /*begin_lba*/0,/* Cover the whole disk */
  903                                        /*lb_count*/0,
  904                                        SSD_FULL_SIZE,
  905                                        5 * 60 * 1000);
  906                 xpt_polled_action((union ccb *)&csio);
  907 
  908                 if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
  909                         if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
  910                              CAM_SCSI_STATUS_ERROR) {
  911                                 int asc, ascq;
  912                                 int sense_key, error_code;
  913 
  914                                 scsi_extract_sense(&csio.sense_data,
  915                                                    &error_code,
  916                                                    &sense_key, 
  917                                                    &asc, &ascq);
  918                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
  919                                         scsi_sense_print(&csio);
  920                         } else {
  921                                 xpt_print(periph->path, "Synchronize cache "
  922                                     "failed, status == 0x%x, scsi status == "
  923                                     "0x%x\n", csio.ccb_h.status,
  924                                     csio.scsi_status);
  925                         }
  926                 }
  927         }
  928         periph->flags &= ~CAM_PERIPH_POLLED;
  929         cam_periph_unlock(periph);
  930         return (0);
  931 }
  932 
  933 static void
  934 dainit(void)
  935 {
  936         cam_status status;
  937 
  938         /*
  939          * Install a global async callback.  This callback will
  940          * receive async callbacks like "new device found".
  941          */
  942         status = xpt_register_async(AC_FOUND_DEVICE, daasync, NULL, NULL);
  943 
  944         if (status != CAM_REQ_CMP) {
  945                 printf("da: Failed to attach master async callback "
  946                        "due to status 0x%x!\n", status);
  947         } else if (da_send_ordered) {
  948 
  949                 /* Register our shutdown event handler */
  950                 if ((EVENTHANDLER_REGISTER(shutdown_post_sync, dashutdown, 
  951                                            NULL, SHUTDOWN_PRI_DEFAULT)) == NULL)
  952                     printf("dainit: shutdown event registration failed!\n");
  953         }
  954 }
  955 
  956 static void
  957 daoninvalidate(struct cam_periph *periph)
  958 {
  959         struct da_softc *softc;
  960 
  961         softc = (struct da_softc *)periph->softc;
  962 
  963         /*
  964          * De-register any async callbacks.
  965          */
  966         xpt_register_async(0, daasync, periph, periph->path);
  967 
  968         softc->flags |= DA_FLAG_PACK_INVALID;
  969 
  970         /*
  971          * Return all queued I/O with ENXIO.
  972          * XXX Handle any transactions queued to the card
  973          *     with XPT_ABORT_CCB.
  974          */
  975         bioq_flush(&softc->bio_queue, NULL, ENXIO);
  976 
  977         disk_gone(softc->disk);
  978         xpt_print(periph->path, "lost device\n");
  979 }
  980 
  981 static void
  982 dacleanup(struct cam_periph *periph)
  983 {
  984         struct da_softc *softc;
  985 
  986         softc = (struct da_softc *)periph->softc;
  987 
  988         xpt_print(periph->path, "removing device entry\n");
  989         /*
  990          * If we can't free the sysctl tree, oh well...
  991          */
  992         if ((softc->flags & DA_FLAG_SCTX_INIT) != 0
  993             && sysctl_ctx_free(&softc->sysctl_ctx) != 0) {
  994                 xpt_print(periph->path, "can't remove sysctl context\n");
  995         }
  996 
  997         cam_periph_unlock(periph);
  998         disk_destroy(softc->disk);
  999         callout_drain(&softc->sendordered_c);
 1000         cam_periph_lock(periph);
 1001         free(softc, M_DEVBUF);
 1002 }
 1003 
 1004 static void
 1005 daasync(void *callback_arg, u_int32_t code,
 1006         struct cam_path *path, void *arg)
 1007 {
 1008         struct cam_periph *periph;
 1009 
 1010         periph = (struct cam_periph *)callback_arg;
 1011         switch (code) {
 1012         case AC_FOUND_DEVICE:
 1013         {
 1014                 struct ccb_getdev *cgd;
 1015                 struct cam_sim *sim;
 1016                 cam_status status;
 1017  
 1018                 cgd = (struct ccb_getdev *)arg;
 1019                 if (cgd == NULL)
 1020                         break;
 1021 
 1022                 if (SID_TYPE(&cgd->inq_data) != T_DIRECT
 1023                     && SID_TYPE(&cgd->inq_data) != T_RBC
 1024                     && SID_TYPE(&cgd->inq_data) != T_OPTICAL)
 1025                         break;
 1026 
 1027                 /*
 1028                  * Allocate a peripheral instance for
 1029                  * this device and start the probe
 1030                  * process.
 1031                  */
 1032                 sim = xpt_path_sim(cgd->ccb_h.path);
 1033                 status = cam_periph_alloc(daregister, daoninvalidate,
 1034                                           dacleanup, dastart,
 1035                                           "da", CAM_PERIPH_BIO,
 1036                                           cgd->ccb_h.path, daasync,
 1037                                           AC_FOUND_DEVICE, cgd);
 1038 
 1039                 if (status != CAM_REQ_CMP
 1040                  && status != CAM_REQ_INPROG)
 1041                         printf("daasync: Unable to attach to new device "
 1042                                 "due to status 0x%x\n", status);
 1043                 break;
 1044         }
 1045         case AC_SENT_BDR:
 1046         case AC_BUS_RESET:
 1047         {
 1048                 struct da_softc *softc;
 1049                 struct ccb_hdr *ccbh;
 1050 
 1051                 softc = (struct da_softc *)periph->softc;
 1052                 /*
 1053                  * Don't fail on the expected unit attention
 1054                  * that will occur.
 1055                  */
 1056                 softc->flags |= DA_FLAG_RETRY_UA;
 1057                 LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le)
 1058                         ccbh->ccb_state |= DA_CCB_RETRY_UA;
 1059                 /* FALLTHROUGH*/
 1060         }
 1061         default:
 1062                 cam_periph_async(periph, code, path, arg);
 1063                 break;
 1064         }
 1065 }
 1066 
 1067 static void
 1068 dasysctlinit(void *context, int pending)
 1069 {
 1070         struct cam_periph *periph;
 1071         struct da_softc *softc;
 1072         char tmpstr[80], tmpstr2[80];
 1073 
 1074         periph = (struct cam_periph *)context;
 1075         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 1076                 return;
 1077 
 1078         softc = (struct da_softc *)periph->softc;
 1079         snprintf(tmpstr, sizeof(tmpstr), "CAM DA unit %d", periph->unit_number);
 1080         snprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number);
 1081 
 1082         mtx_lock(&Giant);
 1083         sysctl_ctx_init(&softc->sysctl_ctx);
 1084         softc->flags |= DA_FLAG_SCTX_INIT;
 1085         softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
 1086                 SYSCTL_STATIC_CHILDREN(_kern_cam_da), OID_AUTO, tmpstr2,
 1087                 CTLFLAG_RD, 0, tmpstr);
 1088         if (softc->sysctl_tree == NULL) {
 1089                 printf("dasysctlinit: unable to allocate sysctl tree\n");
 1090                 mtx_unlock(&Giant);
 1091                 cam_periph_release(periph);
 1092                 return;
 1093         }
 1094 
 1095         /*
 1096          * Now register the sysctl handler, so the user can the value on
 1097          * the fly.
 1098          */
 1099         SYSCTL_ADD_PROC(&softc->sysctl_ctx,SYSCTL_CHILDREN(softc->sysctl_tree),
 1100                 OID_AUTO, "minimum_cmd_size", CTLTYPE_INT | CTLFLAG_RW,
 1101                 &softc->minimum_cmd_size, 0, dacmdsizesysctl, "I",
 1102                 "Minimum CDB size");
 1103 
 1104         mtx_unlock(&Giant);
 1105         cam_periph_release(periph);
 1106 }
 1107 
 1108 static int
 1109 dacmdsizesysctl(SYSCTL_HANDLER_ARGS)
 1110 {
 1111         int error, value;
 1112 
 1113         value = *(int *)arg1;
 1114 
 1115         error = sysctl_handle_int(oidp, &value, 0, req);
 1116 
 1117         if ((error != 0)
 1118          || (req->newptr == NULL))
 1119                 return (error);
 1120 
 1121         /*
 1122          * Acceptable values here are 6, 10, 12 or 16.
 1123          */
 1124         if (value < 6)
 1125                 value = 6;
 1126         else if ((value > 6)
 1127               && (value <= 10))
 1128                 value = 10;
 1129         else if ((value > 10)
 1130               && (value <= 12))
 1131                 value = 12;
 1132         else if (value > 12)
 1133                 value = 16;
 1134 
 1135         *(int *)arg1 = value;
 1136 
 1137         return (0);
 1138 }
 1139 
 1140 static cam_status
 1141 daregister(struct cam_periph *periph, void *arg)
 1142 {
 1143         struct da_softc *softc;
 1144         struct ccb_pathinq cpi;
 1145         struct ccb_getdev *cgd;
 1146         char tmpstr[80];
 1147         caddr_t match;
 1148 
 1149         cgd = (struct ccb_getdev *)arg;
 1150         if (periph == NULL) {
 1151                 printf("daregister: periph was NULL!!\n");
 1152                 return(CAM_REQ_CMP_ERR);
 1153         }
 1154 
 1155         if (cgd == NULL) {
 1156                 printf("daregister: no getdev CCB, can't register device\n");
 1157                 return(CAM_REQ_CMP_ERR);
 1158         }
 1159 
 1160         softc = (struct da_softc *)malloc(sizeof(*softc), M_DEVBUF,
 1161             M_NOWAIT|M_ZERO);
 1162 
 1163         if (softc == NULL) {
 1164                 printf("daregister: Unable to probe new device. "
 1165                        "Unable to allocate softc\n");                           
 1166                 return(CAM_REQ_CMP_ERR);
 1167         }
 1168 
 1169         LIST_INIT(&softc->pending_ccbs);
 1170         softc->state = DA_STATE_PROBE;
 1171         bioq_init(&softc->bio_queue);
 1172         if (SID_IS_REMOVABLE(&cgd->inq_data))
 1173                 softc->flags |= DA_FLAG_PACK_REMOVABLE;
 1174         if ((cgd->inq_data.flags & SID_CmdQue) != 0)
 1175                 softc->flags |= DA_FLAG_TAGGED_QUEUING;
 1176 
 1177         periph->softc = softc;
 1178 
 1179         /*
 1180          * See if this device has any quirks.
 1181          */
 1182         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
 1183                                (caddr_t)da_quirk_table,
 1184                                sizeof(da_quirk_table)/sizeof(*da_quirk_table),
 1185                                sizeof(*da_quirk_table), scsi_inquiry_match);
 1186 
 1187         if (match != NULL)
 1188                 softc->quirks = ((struct da_quirk_entry *)match)->quirks;
 1189         else
 1190                 softc->quirks = DA_Q_NONE;
 1191 
 1192         /* Check if the SIM does not want 6 byte commands */
 1193         xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
 1194         cpi.ccb_h.func_code = XPT_PATH_INQ;
 1195         xpt_action((union ccb *)&cpi);
 1196         if (cpi.ccb_h.status == CAM_REQ_CMP && (cpi.hba_misc & PIM_NO_6_BYTE))
 1197                 softc->quirks |= DA_Q_NO_6_BYTE;
 1198 
 1199         TASK_INIT(&softc->sysctl_task, 0, dasysctlinit, periph);
 1200 
 1201         /*
 1202          * RBC devices don't have to support READ(6), only READ(10).
 1203          */
 1204         if (softc->quirks & DA_Q_NO_6_BYTE || SID_TYPE(&cgd->inq_data) == T_RBC)
 1205                 softc->minimum_cmd_size = 10;
 1206         else
 1207                 softc->minimum_cmd_size = 6;
 1208 
 1209         /*
 1210          * Load the user's default, if any.
 1211          */
 1212         snprintf(tmpstr, sizeof(tmpstr), "kern.cam.da.%d.minimum_cmd_size",
 1213                  periph->unit_number);
 1214         TUNABLE_INT_FETCH(tmpstr, &softc->minimum_cmd_size);
 1215 
 1216         /*
 1217          * 6, 10, 12 and 16 are the currently permissible values.
 1218          */
 1219         if (softc->minimum_cmd_size < 6)
 1220                 softc->minimum_cmd_size = 6;
 1221         else if ((softc->minimum_cmd_size > 6)
 1222               && (softc->minimum_cmd_size <= 10))
 1223                 softc->minimum_cmd_size = 10;
 1224         else if ((softc->minimum_cmd_size > 10)
 1225               && (softc->minimum_cmd_size <= 12))
 1226                 softc->minimum_cmd_size = 12;
 1227         else if (softc->minimum_cmd_size > 12)
 1228                 softc->minimum_cmd_size = 16;
 1229 
 1230         /*
 1231          * Register this media as a disk
 1232          */
 1233 
 1234         mtx_unlock(periph->sim->mtx);
 1235         softc->disk = disk_alloc();
 1236         softc->disk->d_open = daopen;
 1237         softc->disk->d_close = daclose;
 1238         softc->disk->d_strategy = dastrategy;
 1239         softc->disk->d_dump = dadump;
 1240         softc->disk->d_name = "da";
 1241         softc->disk->d_drv1 = periph;
 1242         softc->disk->d_maxsize = DFLTPHYS; /* XXX: probably not arbitrary */
 1243         softc->disk->d_unit = periph->unit_number;
 1244         softc->disk->d_flags = 0;
 1245         if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0)
 1246                 softc->disk->d_flags |= DISKFLAG_CANFLUSHCACHE;
 1247         disk_create(softc->disk, DISK_VERSION);
 1248         mtx_lock(periph->sim->mtx);
 1249 
 1250         /*
 1251          * Add async callbacks for bus reset and
 1252          * bus device reset calls.  I don't bother
 1253          * checking if this fails as, in most cases,
 1254          * the system will function just fine without
 1255          * them and the only alternative would be to
 1256          * not attach the device on failure.
 1257          */
 1258         xpt_register_async(AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE,
 1259                            daasync, periph, periph->path);
 1260 
 1261         /*
 1262          * Take an exclusive refcount on the periph while dastart is called
 1263          * to finish the probe.  The reference will be dropped in dadone at
 1264          * the end of probe.
 1265          */
 1266         (void)cam_periph_hold(periph, PRIBIO);
 1267         xpt_schedule(periph, /*priority*/5);
 1268 
 1269         /*
 1270          * Schedule a periodic event to occasionally send an
 1271          * ordered tag to a device.
 1272          */
 1273         callout_init_mtx(&softc->sendordered_c, periph->sim->mtx, 0);
 1274         callout_reset(&softc->sendordered_c,
 1275             (DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL,
 1276             dasendorderedtag, softc);
 1277 
 1278         return(CAM_REQ_CMP);
 1279 }
 1280 
 1281 static void
 1282 dastart(struct cam_periph *periph, union ccb *start_ccb)
 1283 {
 1284         struct da_softc *softc;
 1285 
 1286         softc = (struct da_softc *)periph->softc;
 1287 
 1288         switch (softc->state) {
 1289         case DA_STATE_NORMAL:
 1290         {
 1291                 /* Pull a buffer from the queue and get going on it */          
 1292                 struct bio *bp;
 1293 
 1294                 /*
 1295                  * See if there is a buf with work for us to do..
 1296                  */
 1297                 bp = bioq_first(&softc->bio_queue);
 1298                 if (periph->immediate_priority <= periph->pinfo.priority) {
 1299                         CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
 1300                                         ("queuing for immediate ccb\n"));
 1301                         start_ccb->ccb_h.ccb_state = DA_CCB_WAITING;
 1302                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
 1303                                           periph_links.sle);
 1304                         periph->immediate_priority = CAM_PRIORITY_NONE;
 1305                         wakeup(&periph->ccb_list);
 1306                 } else if (bp == NULL) {
 1307                         xpt_release_ccb(start_ccb);
 1308                 } else {
 1309                         u_int8_t tag_code;
 1310 
 1311                         bioq_remove(&softc->bio_queue, bp);
 1312 
 1313                         if ((softc->flags & DA_FLAG_NEED_OTAG) != 0) {
 1314                                 softc->flags &= ~DA_FLAG_NEED_OTAG;
 1315                                 softc->ordered_tag_count++;
 1316                                 tag_code = MSG_ORDERED_Q_TAG;
 1317                         } else {
 1318                                 tag_code = MSG_SIMPLE_Q_TAG;
 1319                         }
 1320                         switch (bp->bio_cmd) {
 1321                         case BIO_READ:
 1322                         case BIO_WRITE:
 1323                                 scsi_read_write(&start_ccb->csio,
 1324                                                 /*retries*/da_retry_count,
 1325                                                 /*cbfcnp*/dadone,
 1326                                                 /*tag_action*/tag_code,
 1327                                                 /*read_op*/bp->bio_cmd == BIO_READ,
 1328                                                 /*byte2*/0,
 1329                                                 softc->minimum_cmd_size,
 1330                                                 /*lba*/bp->bio_pblkno,
 1331                                                 /*block_count*/bp->bio_bcount /
 1332                                                 softc->params.secsize,
 1333                                                 /*data_ptr*/ bp->bio_data,
 1334                                                 /*dxfer_len*/ bp->bio_bcount,
 1335                                                 /*sense_len*/SSD_FULL_SIZE,
 1336                                                 /*timeout*/da_default_timeout*1000);
 1337                                 break;
 1338                         case BIO_FLUSH:
 1339                                 scsi_synchronize_cache(&start_ccb->csio,
 1340                                                        /*retries*/1,
 1341                                                        /*cbfcnp*/dadone,
 1342                                                        MSG_SIMPLE_Q_TAG,
 1343                                                        /*begin_lba*/0,/* Cover the whole disk */
 1344                                                        /*lb_count*/0,
 1345                                                        SSD_FULL_SIZE,
 1346                                                        /*timeout*/da_default_timeout*1000);
 1347                                 break;
 1348                         }
 1349                         start_ccb->ccb_h.ccb_state = DA_CCB_BUFFER_IO;
 1350 
 1351                         /*
 1352                          * Block out any asyncronous callbacks
 1353                          * while we touch the pending ccb list.
 1354                          */
 1355                         LIST_INSERT_HEAD(&softc->pending_ccbs,
 1356                                          &start_ccb->ccb_h, periph_links.le);
 1357                         softc->outstanding_cmds++;
 1358 
 1359                         /* We expect a unit attention from this device */
 1360                         if ((softc->flags & DA_FLAG_RETRY_UA) != 0) {
 1361                                 start_ccb->ccb_h.ccb_state |= DA_CCB_RETRY_UA;
 1362                                 softc->flags &= ~DA_FLAG_RETRY_UA;
 1363                         }
 1364 
 1365                         start_ccb->ccb_h.ccb_bp = bp;
 1366                         bp = bioq_first(&softc->bio_queue);
 1367 
 1368                         xpt_action(start_ccb);
 1369                 }
 1370                 
 1371                 if (bp != NULL) {
 1372                         /* Have more work to do, so ensure we stay scheduled */
 1373                         xpt_schedule(periph, /* XXX priority */1);
 1374                 }
 1375                 break;
 1376         }
 1377         case DA_STATE_PROBE:
 1378         {
 1379                 struct ccb_scsiio *csio;
 1380                 struct scsi_read_capacity_data *rcap;
 1381 
 1382                 rcap = (struct scsi_read_capacity_data *)
 1383                     malloc(sizeof(*rcap), M_SCSIDA, M_NOWAIT|M_ZERO);
 1384                 if (rcap == NULL) {
 1385                         printf("dastart: Couldn't malloc read_capacity data\n");
 1386                         /* da_free_periph??? */
 1387                         break;
 1388                 }
 1389                 csio = &start_ccb->csio;
 1390                 scsi_read_capacity(csio,
 1391                                    /*retries*/4,
 1392                                    dadone,
 1393                                    MSG_SIMPLE_Q_TAG,
 1394                                    rcap,
 1395                                    SSD_FULL_SIZE,
 1396                                    /*timeout*/5000);
 1397                 start_ccb->ccb_h.ccb_bp = NULL;
 1398                 start_ccb->ccb_h.ccb_state = DA_CCB_PROBE;
 1399                 xpt_action(start_ccb);
 1400                 break;
 1401         }
 1402         case DA_STATE_PROBE2:
 1403         {
 1404                 struct ccb_scsiio *csio;
 1405                 struct scsi_read_capacity_data_long *rcaplong;
 1406 
 1407                 rcaplong = (struct scsi_read_capacity_data_long *)
 1408                         malloc(sizeof(*rcaplong), M_SCSIDA, M_NOWAIT|M_ZERO);
 1409                 if (rcaplong == NULL) {
 1410                         printf("dastart: Couldn't malloc read_capacity data\n");
 1411                         /* da_free_periph??? */
 1412                         break;
 1413                 }
 1414                 csio = &start_ccb->csio;
 1415                 scsi_read_capacity_16(csio,
 1416                                       /*retries*/ 4,
 1417                                       /*cbfcnp*/ dadone,
 1418                                       /*tag_action*/ MSG_SIMPLE_Q_TAG,
 1419                                       /*lba*/ 0,
 1420                                       /*reladr*/ 0,
 1421                                       /*pmi*/ 0,
 1422                                       rcaplong,
 1423                                       /*sense_len*/ SSD_FULL_SIZE,
 1424                                       /*timeout*/ 60000);
 1425                 start_ccb->ccb_h.ccb_bp = NULL;
 1426                 start_ccb->ccb_h.ccb_state = DA_CCB_PROBE2;
 1427                 xpt_action(start_ccb);  
 1428                 break;
 1429         }
 1430         }
 1431 }
 1432 
 1433 static int
 1434 cmd6workaround(union ccb *ccb)
 1435 {
 1436         struct scsi_rw_6 cmd6;
 1437         struct scsi_rw_10 *cmd10;
 1438         struct da_softc *softc;
 1439         u_int8_t *cdb;
 1440         int frozen;
 1441 
 1442         cdb = ccb->csio.cdb_io.cdb_bytes;
 1443 
 1444         /* Translation only possible if CDB is an array and cmd is R/W6 */
 1445         if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0 ||
 1446             (*cdb != READ_6 && *cdb != WRITE_6))
 1447                 return 0;
 1448 
 1449         xpt_print(ccb->ccb_h.path, "READ(6)/WRITE(6) not supported, "
 1450             "increasing minimum_cmd_size to 10.\n");
 1451         softc = (struct da_softc *)xpt_path_periph(ccb->ccb_h.path)->softc;
 1452         softc->minimum_cmd_size = 10;
 1453 
 1454         bcopy(cdb, &cmd6, sizeof(struct scsi_rw_6));
 1455         cmd10 = (struct scsi_rw_10 *)cdb;
 1456         cmd10->opcode = (cmd6.opcode == READ_6) ? READ_10 : WRITE_10;
 1457         cmd10->byte2 = 0;
 1458         scsi_ulto4b(scsi_3btoul(cmd6.addr), cmd10->addr);
 1459         cmd10->reserved = 0;
 1460         scsi_ulto2b(cmd6.length, cmd10->length);
 1461         cmd10->control = cmd6.control;
 1462         ccb->csio.cdb_len = sizeof(*cmd10);
 1463 
 1464         /* Requeue request, unfreezing queue if necessary */
 1465         frozen = (ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
 1466         ccb->ccb_h.status = CAM_REQUEUE_REQ;
 1467         xpt_action(ccb);
 1468         if (frozen) {
 1469                 cam_release_devq(ccb->ccb_h.path,
 1470                                  /*relsim_flags*/0,
 1471                                  /*reduction*/0,
 1472                                  /*timeout*/0,
 1473                                  /*getcount_only*/0);
 1474         }
 1475         return (ERESTART);
 1476 }
 1477 
 1478 static void
 1479 dadone(struct cam_periph *periph, union ccb *done_ccb)
 1480 {
 1481         struct da_softc *softc;
 1482         struct ccb_scsiio *csio;
 1483 
 1484         softc = (struct da_softc *)periph->softc;
 1485         csio = &done_ccb->csio;
 1486         switch (csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) {
 1487         case DA_CCB_BUFFER_IO:
 1488         {
 1489                 struct bio *bp;
 1490 
 1491                 bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
 1492                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 1493                         int error;
 1494                         int sf;
 1495                         
 1496                         if ((csio->ccb_h.ccb_state & DA_CCB_RETRY_UA) != 0)
 1497                                 sf = SF_RETRY_UA;
 1498                         else
 1499                                 sf = 0;
 1500 
 1501                         error = daerror(done_ccb, CAM_RETRY_SELTO, sf);
 1502                         if (error == ERESTART) {
 1503                                 /*
 1504                                  * A retry was scheuled, so
 1505                                  * just return.
 1506                                  */
 1507                                 return;
 1508                         }
 1509                         if (error != 0) {
 1510 
 1511                                 if (error == ENXIO) {
 1512                                         /*
 1513                                          * Catastrophic error.  Mark our pack as
 1514                                          * invalid.
 1515                                          */
 1516                                         /*
 1517                                          * XXX See if this is really a media
 1518                                          * XXX change first?
 1519                                          */
 1520                                         xpt_print(periph->path,
 1521                                             "Invalidating pack\n");
 1522                                         softc->flags |= DA_FLAG_PACK_INVALID;
 1523                                 }
 1524 
 1525                                 /*
 1526                                  * return all queued I/O with EIO, so that
 1527                                  * the client can retry these I/Os in the
 1528                                  * proper order should it attempt to recover.
 1529                                  */
 1530                                 bioq_flush(&softc->bio_queue, NULL, EIO);
 1531                                 bp->bio_error = error;
 1532                                 bp->bio_resid = bp->bio_bcount;
 1533                                 bp->bio_flags |= BIO_ERROR;
 1534                         } else {
 1535                                 bp->bio_resid = csio->resid;
 1536                                 bp->bio_error = 0;
 1537                                 if (bp->bio_resid != 0)
 1538                                         bp->bio_flags |= BIO_ERROR;
 1539                         }
 1540                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 1541                                 cam_release_devq(done_ccb->ccb_h.path,
 1542                                                  /*relsim_flags*/0,
 1543                                                  /*reduction*/0,
 1544                                                  /*timeout*/0,
 1545                                                  /*getcount_only*/0);
 1546                 } else {
 1547                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 1548                                 panic("REQ_CMP with QFRZN");
 1549                         bp->bio_resid = csio->resid;
 1550                         if (csio->resid > 0)
 1551                                 bp->bio_flags |= BIO_ERROR;
 1552                 }
 1553 
 1554                 /*
 1555                  * Block out any asyncronous callbacks
 1556                  * while we touch the pending ccb list.
 1557                  */
 1558                 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
 1559                 softc->outstanding_cmds--;
 1560                 if (softc->outstanding_cmds == 0)
 1561                         softc->flags |= DA_FLAG_WENT_IDLE;
 1562 
 1563                 biodone(bp);
 1564                 break;
 1565         }
 1566         case DA_CCB_PROBE:
 1567         case DA_CCB_PROBE2:
 1568         {
 1569                 struct     scsi_read_capacity_data *rdcap;
 1570                 struct     scsi_read_capacity_data_long *rcaplong;
 1571                 char       announce_buf[80];
 1572 
 1573                 rdcap = NULL;
 1574                 rcaplong = NULL;
 1575                 if (softc->state == DA_STATE_PROBE)
 1576                         rdcap =(struct scsi_read_capacity_data *)csio->data_ptr;
 1577                 else
 1578                         rcaplong = (struct scsi_read_capacity_data_long *)
 1579                                 csio->data_ptr;
 1580 
 1581                 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
 1582                         struct disk_params *dp;
 1583                         uint32_t block_size;
 1584                         uint64_t maxsector;
 1585 
 1586                         if (softc->state == DA_STATE_PROBE) {
 1587                                 block_size = scsi_4btoul(rdcap->length);
 1588                                 maxsector = scsi_4btoul(rdcap->addr);
 1589 
 1590                                 /*
 1591                                  * According to SBC-2, if the standard 10
 1592                                  * byte READ CAPACITY command returns 2^32,
 1593                                  * we should issue the 16 byte version of
 1594                                  * the command, since the device in question
 1595                                  * has more sectors than can be represented
 1596                                  * with the short version of the command.
 1597                                  */
 1598                                 if (maxsector == 0xffffffff) {
 1599                                         softc->state = DA_STATE_PROBE2;
 1600                                         free(rdcap, M_SCSIDA);
 1601                                         xpt_release_ccb(done_ccb);
 1602                                         xpt_schedule(periph, /*priority*/5);
 1603                                         return;
 1604                                 }
 1605                         } else {
 1606                                 block_size = scsi_4btoul(rcaplong->length);
 1607                                 maxsector = scsi_8btou64(rcaplong->addr);
 1608                         }
 1609 
 1610                         /*
 1611                          * Because GEOM code just will panic us if we
 1612                          * give them an 'illegal' value we'll avoid that
 1613                          * here.
 1614                          */
 1615                         if (block_size >= MAXPHYS || block_size == 0) {
 1616                                 xpt_print(periph->path,
 1617                                     "unsupportable block size %ju\n",
 1618                                     (uintmax_t) block_size);
 1619                                 announce_buf[0] = '\0';
 1620                                 cam_periph_invalidate(periph);
 1621                         } else {
 1622                                 dasetgeom(periph, block_size, maxsector);
 1623                                 dp = &softc->params;
 1624                                 snprintf(announce_buf, sizeof(announce_buf),
 1625                                         "%juMB (%ju %u byte sectors: %dH %dS/T "
 1626                                         "%dC)", (uintmax_t)
 1627                                         (((uintmax_t)dp->secsize *
 1628                                         dp->sectors) / (1024*1024)),
 1629                                         (uintmax_t)dp->sectors,
 1630                                         dp->secsize, dp->heads,
 1631                                         dp->secs_per_track, dp->cylinders);
 1632                         }
 1633                 } else {
 1634                         int     error;
 1635 
 1636                         announce_buf[0] = '\0';
 1637 
 1638                         /*
 1639                          * Retry any UNIT ATTENTION type errors.  They
 1640                          * are expected at boot.
 1641                          */
 1642                         error = daerror(done_ccb, CAM_RETRY_SELTO,
 1643                                         SF_RETRY_UA|SF_NO_PRINT);
 1644                         if (error == ERESTART) {
 1645                                 /*
 1646                                  * A retry was scheuled, so
 1647                                  * just return.
 1648                                  */
 1649                                 return;
 1650                         } else if (error != 0) {
 1651                                 struct scsi_sense_data *sense;
 1652                                 int asc, ascq;
 1653                                 int sense_key, error_code;
 1654                                 int have_sense;
 1655                                 cam_status status;
 1656                                 struct ccb_getdev cgd;
 1657 
 1658                                 /* Don't wedge this device's queue */
 1659                                 status = done_ccb->ccb_h.status;
 1660                                 if ((status & CAM_DEV_QFRZN) != 0)
 1661                                         cam_release_devq(done_ccb->ccb_h.path,
 1662                                                          /*relsim_flags*/0,
 1663                                                          /*reduction*/0,
 1664                                                          /*timeout*/0,
 1665                                                          /*getcount_only*/0);
 1666 
 1667 
 1668                                 xpt_setup_ccb(&cgd.ccb_h, 
 1669                                               done_ccb->ccb_h.path,
 1670                                               /* priority */ 1);
 1671                                 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
 1672                                 xpt_action((union ccb *)&cgd);
 1673 
 1674                                 if (((csio->ccb_h.flags & CAM_SENSE_PHYS) != 0)
 1675                                  || ((csio->ccb_h.flags & CAM_SENSE_PTR) != 0)
 1676                                  || ((status & CAM_AUTOSNS_VALID) == 0))
 1677                                         have_sense = FALSE;
 1678                                 else
 1679                                         have_sense = TRUE;
 1680 
 1681                                 if (have_sense) {
 1682                                         sense = &csio->sense_data;
 1683                                         scsi_extract_sense(sense, &error_code,
 1684                                                            &sense_key, 
 1685                                                            &asc, &ascq);
 1686                                 }
 1687                                 /*
 1688                                  * Attach to anything that claims to be a
 1689                                  * direct access or optical disk device,
 1690                                  * as long as it doesn't return a "Logical
 1691                                  * unit not supported" (0x25) error.
 1692                                  */
 1693                                 if ((have_sense) && (asc != 0x25)
 1694                                  && (error_code == SSD_CURRENT_ERROR)) {
 1695                                         const char *sense_key_desc;
 1696                                         const char *asc_desc;
 1697 
 1698                                         scsi_sense_desc(sense_key, asc, ascq,
 1699                                                         &cgd.inq_data,
 1700                                                         &sense_key_desc,
 1701                                                         &asc_desc);
 1702                                         snprintf(announce_buf,
 1703                                             sizeof(announce_buf),
 1704                                                 "Attempt to query device "
 1705                                                 "size failed: %s, %s",
 1706                                                 sense_key_desc,
 1707                                                 asc_desc);
 1708                                 } else { 
 1709                                         if (have_sense)
 1710                                                 scsi_sense_print(
 1711                                                         &done_ccb->csio);
 1712                                         else {
 1713                                                 xpt_print(periph->path,
 1714                                                     "got CAM status %#x\n",
 1715                                                     done_ccb->ccb_h.status);
 1716                                         }
 1717 
 1718                                         xpt_print(periph->path, "fatal error, "
 1719                                             "failed to attach to device\n");
 1720 
 1721                                         /*
 1722                                          * Free up resources.
 1723                                          */
 1724                                         cam_periph_invalidate(periph);
 1725                                 } 
 1726                         }
 1727                 }
 1728                 free(csio->data_ptr, M_SCSIDA);
 1729                 if (announce_buf[0] != '\0') {
 1730                         xpt_announce_periph(periph, announce_buf);
 1731                         /*
 1732                          * Create our sysctl variables, now that we know
 1733                          * we have successfully attached.
 1734                          */
 1735                         taskqueue_enqueue(taskqueue_thread,&softc->sysctl_task);
 1736                 }
 1737                 softc->state = DA_STATE_NORMAL; 
 1738                 /*
 1739                  * Since our peripheral may be invalidated by an error
 1740                  * above or an external event, we must release our CCB
 1741                  * before releasing the probe lock on the peripheral.
 1742                  * The peripheral will only go away once the last lock
 1743                  * is removed, and we need it around for the CCB release
 1744                  * operation.
 1745                  */
 1746                 xpt_release_ccb(done_ccb);
 1747                 cam_periph_unhold(periph);
 1748                 return;
 1749         }
 1750         case DA_CCB_WAITING:
 1751         {
 1752                 /* Caller will release the CCB */
 1753                 wakeup(&done_ccb->ccb_h.cbfcnp);
 1754                 return;
 1755         }
 1756         case DA_CCB_DUMP:
 1757                 /* No-op.  We're polling */
 1758                 return;
 1759         default:
 1760                 break;
 1761         }
 1762         xpt_release_ccb(done_ccb);
 1763 }
 1764 
 1765 static int
 1766 daerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 1767 {
 1768         struct da_softc   *softc;
 1769         struct cam_periph *periph;
 1770         int error;
 1771 
 1772         periph = xpt_path_periph(ccb->ccb_h.path);
 1773         softc = (struct da_softc *)periph->softc;
 1774 
 1775         /*
 1776          * Automatically detect devices that do not support
 1777          * READ(6)/WRITE(6) and upgrade to using 10 byte cdbs.
 1778          */
 1779         error = 0;
 1780         if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INVALID) {
 1781                 error = cmd6workaround(ccb);
 1782         } else if (((ccb->ccb_h.status & CAM_STATUS_MASK) ==
 1783                    CAM_SCSI_STATUS_ERROR)
 1784          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)
 1785          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
 1786          && ((ccb->ccb_h.flags & CAM_SENSE_PHYS) == 0)
 1787          && ((ccb->ccb_h.flags & CAM_SENSE_PTR) == 0)) {
 1788                 int sense_key, error_code, asc, ascq;
 1789 
 1790                 scsi_extract_sense(&ccb->csio.sense_data,
 1791                                    &error_code, &sense_key, &asc, &ascq);
 1792                 if (sense_key == SSD_KEY_ILLEGAL_REQUEST)
 1793                         error = cmd6workaround(ccb);
 1794         }
 1795         if (error == ERESTART)
 1796                 return (ERESTART);
 1797 
 1798         /*
 1799          * XXX
 1800          * Until we have a better way of doing pack validation,
 1801          * don't treat UAs as errors.
 1802          */
 1803         sense_flags |= SF_RETRY_UA;
 1804         return(cam_periph_error(ccb, cam_flags, sense_flags,
 1805                                 &softc->saved_ccb));
 1806 }
 1807 
 1808 static void
 1809 daprevent(struct cam_periph *periph, int action)
 1810 {
 1811         struct  da_softc *softc;
 1812         union   ccb *ccb;               
 1813         int     error;
 1814                 
 1815         softc = (struct da_softc *)periph->softc;
 1816 
 1817         if (((action == PR_ALLOW)
 1818           && (softc->flags & DA_FLAG_PACK_LOCKED) == 0)
 1819          || ((action == PR_PREVENT)
 1820           && (softc->flags & DA_FLAG_PACK_LOCKED) != 0)) {
 1821                 return;
 1822         }
 1823 
 1824         ccb = cam_periph_getccb(periph, /*priority*/1);
 1825 
 1826         scsi_prevent(&ccb->csio,
 1827                      /*retries*/1,
 1828                      /*cbcfp*/dadone,
 1829                      MSG_SIMPLE_Q_TAG,
 1830                      action,
 1831                      SSD_FULL_SIZE,
 1832                      5000);
 1833 
 1834         error = cam_periph_runccb(ccb, /*error_routine*/NULL, CAM_RETRY_SELTO,
 1835                                   SF_RETRY_UA, softc->disk->d_devstat);
 1836 
 1837         if (error == 0) {
 1838                 if (action == PR_ALLOW)
 1839                         softc->flags &= ~DA_FLAG_PACK_LOCKED;
 1840                 else
 1841                         softc->flags |= DA_FLAG_PACK_LOCKED;
 1842         }
 1843 
 1844         xpt_release_ccb(ccb);
 1845 }
 1846 
 1847 static int
 1848 dagetcapacity(struct cam_periph *periph)
 1849 {
 1850         struct da_softc *softc;
 1851         union ccb *ccb;
 1852         struct scsi_read_capacity_data *rcap;
 1853         struct scsi_read_capacity_data_long *rcaplong;
 1854         uint32_t block_len;
 1855         uint64_t maxsector;
 1856         int error;
 1857         u_int32_t sense_flags;
 1858 
 1859         softc = (struct da_softc *)periph->softc;
 1860         block_len = 0;
 1861         maxsector = 0;
 1862         error = 0;
 1863         sense_flags = SF_RETRY_UA;
 1864         if (softc->flags & DA_FLAG_PACK_REMOVABLE)
 1865                 sense_flags |= SF_NO_PRINT;
 1866 
 1867         /* Do a read capacity */
 1868         rcap = (struct scsi_read_capacity_data *)malloc(sizeof(*rcaplong),
 1869                                                         M_SCSIDA,
 1870                                                         M_NOWAIT);
 1871         if (rcap == NULL)
 1872                 return (ENOMEM);
 1873                 
 1874         ccb = cam_periph_getccb(periph, /*priority*/1);
 1875         scsi_read_capacity(&ccb->csio,
 1876                            /*retries*/4,
 1877                            /*cbfncp*/dadone,
 1878                            MSG_SIMPLE_Q_TAG,
 1879                            rcap,
 1880                            SSD_FULL_SIZE,
 1881                            /*timeout*/60000);
 1882         ccb->ccb_h.ccb_bp = NULL;
 1883 
 1884         error = cam_periph_runccb(ccb, daerror,
 1885                                   /*cam_flags*/CAM_RETRY_SELTO,
 1886                                   sense_flags,
 1887                                   softc->disk->d_devstat);
 1888 
 1889         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 1890                 cam_release_devq(ccb->ccb_h.path,
 1891                                  /*relsim_flags*/0,
 1892                                  /*reduction*/0,
 1893                                  /*timeout*/0,
 1894                                  /*getcount_only*/0);
 1895 
 1896         if (error == 0) {
 1897                 block_len = scsi_4btoul(rcap->length);
 1898                 maxsector = scsi_4btoul(rcap->addr);
 1899 
 1900                 if (maxsector != 0xffffffff)
 1901                         goto done;
 1902         } else
 1903                 goto done;
 1904 
 1905         rcaplong = (struct scsi_read_capacity_data_long *)rcap;
 1906 
 1907         scsi_read_capacity_16(&ccb->csio,
 1908                               /*retries*/ 4,
 1909                               /*cbfcnp*/ dadone,
 1910                               /*tag_action*/ MSG_SIMPLE_Q_TAG,
 1911                               /*lba*/ 0,
 1912                               /*reladr*/ 0,
 1913                               /*pmi*/ 0,
 1914                               rcaplong,
 1915                               /*sense_len*/ SSD_FULL_SIZE,
 1916                               /*timeout*/ 60000);
 1917         ccb->ccb_h.ccb_bp = NULL;
 1918 
 1919         error = cam_periph_runccb(ccb, daerror,
 1920                                   /*cam_flags*/CAM_RETRY_SELTO,
 1921                                   sense_flags,
 1922                                   softc->disk->d_devstat);
 1923 
 1924         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 1925                 cam_release_devq(ccb->ccb_h.path,
 1926                                  /*relsim_flags*/0,
 1927                                  /*reduction*/0,
 1928                                  /*timeout*/0,
 1929                                  /*getcount_only*/0);
 1930 
 1931         if (error == 0) {
 1932                 block_len = scsi_4btoul(rcaplong->length);
 1933                 maxsector = scsi_8btou64(rcaplong->addr);
 1934         }
 1935 
 1936 done:
 1937 
 1938         if (error == 0)
 1939                 dasetgeom(periph, block_len, maxsector);
 1940 
 1941         xpt_release_ccb(ccb);
 1942 
 1943         free(rcap, M_SCSIDA);
 1944 
 1945         return (error);
 1946 }
 1947 
 1948 static void
 1949 dasetgeom(struct cam_periph *periph, uint32_t block_len, uint64_t maxsector)
 1950 {
 1951         struct ccb_calc_geometry ccg;
 1952         struct da_softc *softc;
 1953         struct disk_params *dp;
 1954 
 1955         softc = (struct da_softc *)periph->softc;
 1956 
 1957         dp = &softc->params;
 1958         dp->secsize = block_len;
 1959         dp->sectors = maxsector + 1;
 1960         /*
 1961          * Have the controller provide us with a geometry
 1962          * for this disk.  The only time the geometry
 1963          * matters is when we boot and the controller
 1964          * is the only one knowledgeable enough to come
 1965          * up with something that will make this a bootable
 1966          * device.
 1967          */
 1968         xpt_setup_ccb(&ccg.ccb_h, periph->path, /*priority*/1);
 1969         ccg.ccb_h.func_code = XPT_CALC_GEOMETRY;
 1970         ccg.block_size = dp->secsize;
 1971         ccg.volume_size = dp->sectors;
 1972         ccg.heads = 0;
 1973         ccg.secs_per_track = 0;
 1974         ccg.cylinders = 0;
 1975         xpt_action((union ccb*)&ccg);
 1976         if ((ccg.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 1977                 /*
 1978                  * We don't know what went wrong here- but just pick
 1979                  * a geometry so we don't have nasty things like divide
 1980                  * by zero.
 1981                  */
 1982                 dp->heads = 255;
 1983                 dp->secs_per_track = 255;
 1984                 dp->cylinders = dp->sectors / (255 * 255);
 1985                 if (dp->cylinders == 0) {
 1986                         dp->cylinders = 1;
 1987                 }
 1988         } else {
 1989                 dp->heads = ccg.heads;
 1990                 dp->secs_per_track = ccg.secs_per_track;
 1991                 dp->cylinders = ccg.cylinders;
 1992         }
 1993 }
 1994 
 1995 static void
 1996 dasendorderedtag(void *arg)
 1997 {
 1998         struct da_softc *softc = arg;
 1999 
 2000         if (da_send_ordered) {
 2001                 if ((softc->ordered_tag_count == 0) 
 2002                  && ((softc->flags & DA_FLAG_WENT_IDLE) == 0)) {
 2003                         softc->flags |= DA_FLAG_NEED_OTAG;
 2004                 }
 2005                 if (softc->outstanding_cmds > 0)
 2006                         softc->flags &= ~DA_FLAG_WENT_IDLE;
 2007 
 2008                 softc->ordered_tag_count = 0;
 2009         }
 2010         /* Queue us up again */
 2011         callout_reset(&softc->sendordered_c,
 2012             (DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL,
 2013             dasendorderedtag, softc);
 2014 }
 2015 
 2016 /*
 2017  * Step through all DA peripheral drivers, and if the device is still open,
 2018  * sync the disk cache to physical media.
 2019  */
 2020 static void
 2021 dashutdown(void * arg, int howto)
 2022 {
 2023         struct cam_periph *periph;
 2024         struct da_softc *softc;
 2025 
 2026         TAILQ_FOREACH(periph, &dadriver.units, unit_links) {
 2027                 union ccb ccb;
 2028 
 2029                 cam_periph_lock(periph);
 2030                 softc = (struct da_softc *)periph->softc;
 2031 
 2032                 /*
 2033                  * We only sync the cache if the drive is still open, and
 2034                  * if the drive is capable of it..
 2035                  */
 2036                 if (((softc->flags & DA_FLAG_OPEN) == 0)
 2037                  || (softc->quirks & DA_Q_NO_SYNC_CACHE)) {
 2038                         cam_periph_unlock(periph);
 2039                         continue;
 2040                 }
 2041 
 2042                 xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/1);
 2043 
 2044                 ccb.ccb_h.ccb_state = DA_CCB_DUMP;
 2045                 scsi_synchronize_cache(&ccb.csio,
 2046                                        /*retries*/1,
 2047                                        /*cbfcnp*/dadone,
 2048                                        MSG_SIMPLE_Q_TAG,
 2049                                        /*begin_lba*/0, /* whole disk */
 2050                                        /*lb_count*/0,
 2051                                        SSD_FULL_SIZE,
 2052                                        60 * 60 * 1000);
 2053 
 2054                 xpt_polled_action(&ccb);
 2055 
 2056                 if ((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 2057                         if (((ccb.ccb_h.status & CAM_STATUS_MASK) ==
 2058                              CAM_SCSI_STATUS_ERROR)
 2059                          && (ccb.csio.scsi_status == SCSI_STATUS_CHECK_COND)){
 2060                                 int error_code, sense_key, asc, ascq;
 2061 
 2062                                 scsi_extract_sense(&ccb.csio.sense_data,
 2063                                                    &error_code, &sense_key,
 2064                                                    &asc, &ascq);
 2065 
 2066                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
 2067                                         scsi_sense_print(&ccb.csio);
 2068                         } else {
 2069                                 xpt_print(periph->path, "Synchronize "
 2070                                     "cache failed, status == 0x%x, scsi status "
 2071                                     "== 0x%x\n", ccb.ccb_h.status,
 2072                                     ccb.csio.scsi_status);
 2073                         }
 2074                 }
 2075 
 2076                 if ((ccb.ccb_h.status & CAM_DEV_QFRZN) != 0)
 2077                         cam_release_devq(ccb.ccb_h.path,
 2078                                          /*relsim_flags*/0,
 2079                                          /*reduction*/0,
 2080                                          /*timeout*/0,
 2081                                          /*getcount_only*/0);
 2082                 cam_periph_unlock(periph);
 2083         }
 2084 }
 2085 
 2086 #else /* !_KERNEL */
 2087 
 2088 /*
 2089  * XXX This is only left out of the kernel build to silence warnings.  If,
 2090  * for some reason this function is used in the kernel, the ifdefs should
 2091  * be moved so it is included both in the kernel and userland.
 2092  */
 2093 void
 2094 scsi_format_unit(struct ccb_scsiio *csio, u_int32_t retries,
 2095                  void (*cbfcnp)(struct cam_periph *, union ccb *),
 2096                  u_int8_t tag_action, u_int8_t byte2, u_int16_t ileave,
 2097                  u_int8_t *data_ptr, u_int32_t dxfer_len, u_int8_t sense_len,
 2098                  u_int32_t timeout)
 2099 {
 2100         struct scsi_format_unit *scsi_cmd;
 2101 
 2102         scsi_cmd = (struct scsi_format_unit *)&csio->cdb_io.cdb_bytes;
 2103         scsi_cmd->opcode = FORMAT_UNIT;
 2104         scsi_cmd->byte2 = byte2;
 2105         scsi_ulto2b(ileave, scsi_cmd->interleave);
 2106 
 2107         cam_fill_csio(csio,
 2108                       retries,
 2109                       cbfcnp,
 2110                       /*flags*/ (dxfer_len > 0) ? CAM_DIR_OUT : CAM_DIR_NONE,
 2111                       tag_action,
 2112                       data_ptr,
 2113                       dxfer_len,
 2114                       sense_len,
 2115                       sizeof(*scsi_cmd),
 2116                       timeout);
 2117 }
 2118 
 2119 #endif /* _KERNEL */

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