sys/bus/cam/scsi/scsi_da.c

   1 /*
   2  * Implementation of SCSI Direct Access Peripheral driver for CAM.
   3  *
   4  * Copyright (c) 1997 Justin T. Gibbs.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions, and the following disclaimer,
  12  *    without modification, immediately at the beginning of the file.
  13  * 2. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/sys/cam/scsi/scsi_da.c,v 1.42.2.46 2003/10/21 22:18:19 thomas Exp $
  29  * $DragonFly: src/sys/bus/cam/scsi/scsi_da.c,v 1.59 2008/08/29 20:08:40 dillon Exp $
  30  */
  31
  32 #include <sys/param.h>
  33 #include <sys/bootmaj.h>
  34
  35 #ifdef _KERNEL
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #include <sys/buf.h>
  39 #include <sys/sysctl.h>
  40 #include <sys/taskqueue.h>
  41 #include <sys/lock.h>
  42 #include <sys/conf.h>
  43 #include <sys/devicestat.h>
  44 #include <sys/disk.h>
  45 #include <sys/dtype.h>
  46 #include <sys/eventhandler.h>
  47 #include <sys/malloc.h>
  48 #include <sys/cons.h>
  49 #include <sys/proc.h>
  50 #include <sys/buf2.h>
  51 #include <sys/thread2.h>
  52 #endif /* _KERNEL */
  53
  54 #ifdef _KERNEL
  55 #include <vm/pmap.h>
  56 #endif
  57
  58 #ifndef _KERNEL
  59 #include <stdio.h>
  60 #include <string.h>
  61 #endif /* _KERNEL */
  62
  63 #include "../cam.h"
  64 #include "../cam_ccb.h"
  65 #include "../cam_extend.h"
  66 #include "../cam_periph.h"
  67 #include "../cam_xpt_periph.h"
  68 #include "../cam_sim.h"
  69
  70 #include "scsi_message.h"
  71
  72 #ifndef _KERNEL
  73 #include "scsi_da.h"
  74 #endif /* !_KERNEL */
  75
  76 #ifdef _KERNEL
  77 typedef enum {
  78         DA_STATE_PROBE,
  79         DA_STATE_PROBE2,
  80         DA_STATE_NORMAL
  81 } da_state;
  82
  83 typedef enum {
  84         DA_FLAG_PACK_INVALID    = 0x001,
  85         DA_FLAG_NEW_PACK        = 0x002,
  86         DA_FLAG_PACK_LOCKED     = 0x004,
  87         DA_FLAG_PACK_REMOVABLE  = 0x008,
  88         DA_FLAG_TAGGED_QUEUING  = 0x010,
  89         DA_FLAG_NEED_OTAG       = 0x020,
  90         DA_FLAG_WENT_IDLE       = 0x040,
  91         DA_FLAG_RETRY_UA        = 0x080,
  92         DA_FLAG_OPEN            = 0x100,
  93         DA_FLAG_SCTX_INIT       = 0x200
  94 } da_flags;
  95
  96 typedef enum {
  97         DA_Q_NONE               = 0x00,
  98         DA_Q_NO_SYNC_CACHE      = 0x01,
  99         DA_Q_NO_6_BYTE          = 0x02,
 100         DA_Q_NO_PREVENT         = 0x04
 101 } da_quirks;
 102
 103 typedef enum {
 104         DA_CCB_PROBE            = 0x01,
 105         DA_CCB_PROBE2           = 0x02,
 106         DA_CCB_BUFFER_IO        = 0x03,
 107         DA_CCB_WAITING          = 0x04,
 108         DA_CCB_DUMP             = 0x05,
 109         DA_CCB_TYPE_MASK        = 0x0F,
 110         DA_CCB_RETRY_UA         = 0x10
 111 } da_ccb_state;
 112
 113 /* Offsets into our private area for storing information */
 114 #define ccb_state       ppriv_field0
 115 #define ccb_bio         ppriv_ptr1
 116
 117 struct disk_params {
 118         u_int8_t  heads;
 119         u_int32_t cylinders;
 120         u_int8_t  secs_per_track;
 121         u_int32_t secsize;      /* Number of bytes/sector */
 122         u_int64_t sectors;      /* total number sectors */
 123 };
 124
 125 struct da_softc {
 126         struct   bio_queue_head bio_queue;
 127         struct   devstat device_stats;
 128         SLIST_ENTRY(da_softc) links;
 129         LIST_HEAD(, ccb_hdr) pending_ccbs;
 130         da_state state;
 131         da_flags flags;
 132         da_quirks quirks;
 133         int      minimum_cmd_size;
 134         int      ordered_tag_count;
 135         int      outstanding_cmds;
 136         struct   disk_params params;
 137         struct   disk disk;
 138         union    ccb saved_ccb;
 139         struct task             sysctl_task;
 140         struct sysctl_ctx_list  sysctl_ctx;
 141         struct sysctl_oid       *sysctl_tree;
 142         struct callout          sendordered_c;
 143 };
 144
 145 struct da_quirk_entry {
 146         struct scsi_inquiry_pattern inq_pat;
 147         da_quirks quirks;
 148 };
 149
 150 static const char quantum[] = "QUANTUM";
 151 static const char microp[] = "MICROP";
 152
 153 static struct da_quirk_entry da_quirk_table[] =
 154 {
 155         /* SPI, FC devices */
 156         {
 157                 /*
 158                  * Fujitsu M2513A MO drives.
 159                  * Tested devices: M2513A2 firmware versions 1200 & 1300.
 160                  * (dip switch selects whether T_DIRECT or T_OPTICAL device)
 161                  * Reported by: W.Scholten <whs@xs4all.nl>
 162                  */
 163                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
 164                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 165         },
 166         {
 167                 /* See above. */
 168                 {T_OPTICAL, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
 169                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 170         },
 171         {
 172                 /*
 173                  * This particular Fujitsu drive doesn't like the
 174                  * synchronize cache command.
 175                  * Reported by: Tom Jackson <toj@gorilla.net>
 176                  */
 177                 {T_DIRECT, SIP_MEDIA_FIXED, "FUJITSU", "M2954*", "*"},
 178                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 179         },
 180         {
 181                 /*
 182                  * This drive doesn't like the synchronize cache command
 183                  * either.  Reported by: Matthew Jacob <mjacob@feral.com>
 184                  * in NetBSD PR kern/6027, August 24, 1998.
 185                  */
 186                 {T_DIRECT, SIP_MEDIA_FIXED, microp, "2217*", "*"},
 187                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 188         },
 189         {
 190                 /*
 191                  * This drive doesn't like the synchronize cache command
 192                  * either.  Reported by: Hellmuth Michaelis (hm@kts.org)
 193                  * (PR 8882).
 194                  */
 195                 {T_DIRECT, SIP_MEDIA_FIXED, microp, "2112*", "*"},
 196                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 197         },
 198         {
 199                 /*
 200                  * Doesn't like the synchronize cache command.
 201                  * Reported by: Blaz Zupan <blaz@gold.amis.net>
 202                  */
 203                 {T_DIRECT, SIP_MEDIA_FIXED, "NEC", "D3847*", "*"},
 204                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 205         },
 206         {
 207                 /*
 208                  * Doesn't like the synchronize cache command.
 209                  * Reported by: Blaz Zupan <blaz@gold.amis.net>
 210                  */
 211                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "MAVERICK 540S", "*"},
 212                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 213         },
 214         {
 215                 /*
 216                  * Doesn't like the synchronize cache command.
 217                  */
 218                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS525S", "*"},
 219                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 220         },
 221         {
 222                 /*
 223                  * Doesn't like the synchronize cache command.
 224                  * Reported by: walter@pelissero.de
 225                  */
 226                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS540S", "*"},
 227                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 228         },
 229         {
 230                 /*
 231                  * Doesn't work correctly with 6 byte reads/writes.
 232                  * Returns illegal request, and points to byte 9 of the
 233                  * 6-byte CDB.
 234                  * Reported by:  Adam McDougall <bsdx@spawnet.com>
 235                  */
 236                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 4*", "*"},
 237                 /*quirks*/ DA_Q_NO_6_BYTE
 238         },
 239         {
 240                 /* See above. */
 241                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 2*", "*"},
 242                 /*quirks*/ DA_Q_NO_6_BYTE
 243         },
 244         {
 245                 /*
 246                  * Doesn't like the synchronize cache command.
 247                  * Reported by: walter@pelissero.de
 248                  */
 249                 {T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CP3500*", "*"},
 250                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 251         },
 252         {
 253                 /*
 254                  * The CISS RAID controllers do not support SYNC_CACHE
 255                  */
 256                 {T_DIRECT, SIP_MEDIA_FIXED, "COMPAQ", "RAID*", "*"},
 257                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 258         },
 259         /*
 260          * USB mass storage devices supported by umass(4)
 261          *
 262          * NOTE: USB attachments automatically set DA_Q_NO_SYNC_CACHE so
 263          *       it does not have to be specified here.
 264          */
 265         {
 266                 /*
 267                  * Creative Nomad MUVO mp3 player (USB)
 268                  * PR: kern/53094
 269                  */
 270                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "NOMAD_MUVO", "*"},
 271                 /*quirks*/ DA_Q_NO_PREVENT
 272         },
 273         {
 274                 /*
 275                  * Sigmatel USB Flash MP3 Player
 276                  * PR: kern/57046
 277                  */
 278                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "SigmaTel", "MSCN", "*"},
 279                 /*quirks*/ DA_Q_NO_PREVENT
 280         },
 281         {
 282                 /*
 283                  * SEAGRAND NP-900 MP3 Player
 284                  * PR: kern/64563
 285                  */
 286                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "SEAGRAND", "NP-900*", "*"},
 287                 /*quirks*/ DA_Q_NO_PREVENT
 288         },
 289         {
 290                 /*
 291                  * Creative MUVO Slim mp3 player (USB)
 292                  * PR: usb/86131
 293                  */
 294                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "MuVo Slim",
 295                 "*"}, /*quirks*/ DA_Q_NO_PREVENT
 296         },
 297         {
 298                 /*
 299                  * Philips USB Key Audio KEY013
 300                  * PR: usb/68412
 301                  */
 302                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "PHILIPS", "Key*", "*"},
 303                 /*quirks*/ DA_Q_NO_PREVENT
 304         },
 305 };
 306
 307 static  d_open_t        daopen;
 308 static  d_close_t       daclose;
 309 static  d_strategy_t    dastrategy;
 310 static  d_dump_t        dadump;
 311 static  periph_init_t   dainit;
 312 static  void            daasync(void *callback_arg, u_int32_t code,
 313                                 struct cam_path *path, void *arg);
 314 static  int             dacmdsizesysctl(SYSCTL_HANDLER_ARGS);
 315 static  periph_ctor_t   daregister;
 316 static  periph_dtor_t   dacleanup;
 317 static  periph_start_t  dastart;
 318 static  periph_oninv_t  daoninvalidate;
 319 static  void            dadone(struct cam_periph *periph,
 320                                union ccb *done_ccb);
 321 static  int             daerror(union ccb *ccb, u_int32_t cam_flags,
 322                                 u_int32_t sense_flags);
 323 static void             daprevent(struct cam_periph *periph, int action);
 324 static int              dagetcapacity(struct cam_periph *periph);
 325 static void             dasetgeom(struct cam_periph *periph, uint32_t block_len,
 326                                   uint64_t maxsector);
 327
 328 static timeout_t        dasendorderedtag;
 329 static void             dashutdown(void *arg, int howto);
 330
 331 #ifndef DA_DEFAULT_TIMEOUT
 332 #define DA_DEFAULT_TIMEOUT 60   /* Timeout in seconds */
 333 #endif
 334
 335 #ifndef DA_DEFAULT_RETRY
 336 #define DA_DEFAULT_RETRY        4
 337 #endif
 338
 339 #ifndef DA_DEFAULT_SEND_ORDERED
 340 #define DA_DEFAULT_SEND_ORDERED 1
 341 #endif
 342
 343 static int da_retry_count = DA_DEFAULT_RETRY;
 344 static int da_default_timeout = DA_DEFAULT_TIMEOUT;
 345 static int da_send_ordered = DA_DEFAULT_SEND_ORDERED;
 346 static struct callout dasendorderedtag_ch;
 347
 348 SYSCTL_NODE(_kern_cam, OID_AUTO, da, CTLFLAG_RD, 0,
 349             "CAM Direct Access Disk driver");
 350 SYSCTL_INT(_kern_cam_da, OID_AUTO, retry_count, CTLFLAG_RW,
 351            &da_retry_count, 0, "Normal I/O retry count");
 352 TUNABLE_INT("kern.cam.da.retry_count", &da_retry_count);
 353 SYSCTL_INT(_kern_cam_da, OID_AUTO, default_timeout, CTLFLAG_RW,
 354            &da_default_timeout, 0, "Normal I/O timeout (in seconds)");
 355 TUNABLE_INT("kern.cam.da.default_timeout", &da_default_timeout);
 356 SYSCTL_INT(_kern_cam_da, OID_AUTO, da_send_ordered, CTLFLAG_RW,
 357            &da_send_ordered, 0, "Send Ordered Tags");
 358 TUNABLE_INT("kern.cam.da.da_send_ordered", &da_send_ordered);
 359
 360 /*
 361  * DA_ORDEREDTAG_INTERVAL determines how often, relative
 362  * to the default timeout, we check to see whether an ordered
 363  * tagged transaction is appropriate to prevent simple tag
 364  * starvation.  Since we'd like to ensure that there is at least
 365  * 1/2 of the timeout length left for a starved transaction to
 366  * complete after we've sent an ordered tag, we must poll at least
 367  * four times in every timeout period.  This takes care of the worst
 368  * case where a starved transaction starts during an interval that
 369  * meets the requirement "don't send an ordered tag" test so it takes
 370  * us two intervals to determine that a tag must be sent.
 371  */
 372 #ifndef DA_ORDEREDTAG_INTERVAL
 373 #define DA_ORDEREDTAG_INTERVAL 4
 374 #endif
 375
 376 static struct periph_driver dadriver =
 377 {
 378         dainit, "da",
 379         TAILQ_HEAD_INITIALIZER(dadriver.units), /* generation */ 0
 380 };
 381
 382 PERIPHDRIVER_DECLARE(da, dadriver);
 383
 384 static struct dev_ops da_ops = {
 385         { "da", DA_CDEV_MAJOR, D_DISK },
 386         .d_open =       daopen,
 387         .d_close =      daclose,
 388         .d_read =       physread,
 389         .d_write =      physwrite,
 390         .d_strategy =   dastrategy,
 391         .d_dump =       dadump
 392 };
 393
 394 static struct extend_array *daperiphs;
 395
 396 MALLOC_DEFINE(M_SCSIDA, "scsi_da", "scsi_da buffers");
 397
 398 static int
 399 daopen(struct dev_open_args *ap)
 400 {
 401         cdev_t dev = ap->a_head.a_dev;
 402         struct cam_periph *periph;
 403         struct da_softc *softc;
 404         struct disk_info info;
 405         int unit;
 406         int error;
 407
 408         unit = dkunit(dev);
 409         periph = cam_extend_get(daperiphs, unit);
 410         if (periph == NULL) {
 411                 return (ENXIO);
 412         }
 413
 414         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
 415                 return(ENXIO);
 416         }
 417
 418         cam_periph_lock(periph);
 419         if ((error = cam_periph_hold(periph, PCATCH)) != 0) {
 420                 cam_periph_unlock(periph);
 421                 cam_periph_release(periph);
 422                 return (error);
 423         }
 424
 425         unit = periph->unit_number;
 426         softc = (struct da_softc *)periph->softc;
 427         softc->flags |= DA_FLAG_OPEN;
 428
 429         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 430             ("daopen: dev=%s (unit %d)\n", devtoname(dev),
 431              unit));
 432
 433         if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
 434                 /* Invalidate our pack information. */
 435                 disk_invalidate(&softc->disk);
 436                 softc->flags &= ~DA_FLAG_PACK_INVALID;
 437         }
 438
 439         error = dagetcapacity(periph);
 440
 441 #if 0
 442         /* Do a read capacity */
 443         {
 444                 struct scsi_read_capacity_data *rcap;
 445                 union  ccb *ccb;
 446
 447                 rcap = kmalloc(sizeof(*rcap), M_SCSIDA, M_INTWAIT | M_ZERO);
 448
 449                 ccb = cam_periph_getccb(periph, /*priority*/1);
 450                 scsi_read_capacity(&ccb->csio,
 451                                    /*retries*/1,
 452                                    /*cbfncp*/dadone,
 453                                    MSG_SIMPLE_Q_TAG,
 454                                    rcap,
 455                                    SSD_FULL_SIZE,
 456                                    /*timeout*/60000);
 457                 ccb->ccb_h.ccb_bio = NULL;
 458
 459                 error = cam_periph_runccb(ccb, daerror, /*cam_flags*/0,
 460                                           /*sense_flags*/SF_RETRY_UA |
 461                                                          SF_RETRY_SELTO,
 462                                           &softc->device_stats);
 463
 464                 xpt_release_ccb(ccb);
 465
 466                 if (error == 0) {
 467                         dasetgeom(periph, rcap);
 468                 }
 469
 470                 kfree(rcap, M_SCSIDA);
 471         }
 472 #endif
 473
 474         if (error == 0) {
 475                 struct ccb_getdev cgd;
 476
 477                 /* Build disk information structure */
 478                 bzero(&info, sizeof(info));
 479                 info.d_type = DTYPE_SCSI;
 480
 481                 /*
 482                  * Grab the inquiry data to get the vendor and product names.
 483                  * Put them in the typename and packname for the label.
 484                  */
 485                 xpt_setup_ccb(&cgd.ccb_h, periph->path, /*priority*/ 1);
 486                 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
 487                 xpt_action((union ccb *)&cgd);
 488
 489 #if 0
 490                 strncpy(label->d_typename, cgd.inq_data.vendor,
 491                         min(SID_VENDOR_SIZE, sizeof(label->d_typename)));
 492                 strncpy(label->d_packname, cgd.inq_data.product,
 493                         min(SID_PRODUCT_SIZE, sizeof(label->d_packname)));
 494 #endif
 495
 496                 /*
 497                  * Mandatory fields
 498                  */
 499                 info.d_media_blksize = softc->params.secsize;
 500                 info.d_media_blocks = softc->params.sectors;
 501                 info.d_media_size = 0;
 502
 503                 /*
 504                  * Optional fields
 505                  */
 506                 info.d_secpertrack = softc->params.secs_per_track;
 507                 info.d_nheads = softc->params.heads;
 508                 info.d_ncylinders = softc->params.cylinders;
 509                 info.d_secpercyl = softc->params.heads *
 510                                    softc->params.secs_per_track;
 511                 disk_setdiskinfo(&softc->disk, &info);
 512
 513                 /*
 514                  * Check to see whether or not the blocksize is set yet.
 515                  * If it isn't, set it and then clear the blocksize
 516                  * unavailable flag for the device statistics.
 517                  */
 518                 if ((softc->device_stats.flags & DEVSTAT_BS_UNAVAILABLE) != 0){
 519                         softc->device_stats.block_size = softc->params.secsize;
 520                         softc->device_stats.flags &= ~DEVSTAT_BS_UNAVAILABLE;
 521                 }
 522         }
 523
 524         if (error == 0) {
 525                 if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0 &&
 526                     (softc->quirks & DA_Q_NO_PREVENT) == 0)
 527                         daprevent(periph, PR_PREVENT);
 528         } else {
 529                 softc->flags &= ~DA_FLAG_OPEN;
 530                 cam_periph_release(periph);
 531         }
 532         cam_periph_unhold(periph, 1);
 533         return (error);
 534 }
 535
 536 static int
 537 daclose(struct dev_close_args *ap)
 538 {
 539         cdev_t dev = ap->a_head.a_dev;
 540         struct  cam_periph *periph;
 541         struct  da_softc *softc;
 542         int     unit;
 543         int     error;
 544
 545         unit = dkunit(dev);
 546         periph = cam_extend_get(daperiphs, unit);
 547         if (periph == NULL)
 548                 return (ENXIO);
 549
 550         cam_periph_lock(periph);
 551         if ((error = cam_periph_hold(periph, 0)) != 0) {
 552                 cam_periph_unlock(periph);
 553                 cam_periph_release(periph);
 554                 return (error);
 555         }
 556
 557         softc = (struct da_softc *)periph->softc;
 558
 559         if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
 560                 union   ccb *ccb;
 561
 562                 ccb = cam_periph_getccb(periph, /*priority*/1);
 563
 564                 scsi_synchronize_cache(&ccb->csio,
 565                                        /*retries*/1,
 566                                        /*cbfcnp*/dadone,
 567                                        MSG_SIMPLE_Q_TAG,
 568                                        /*begin_lba*/0,/* Cover the whole disk */
 569                                        /*lb_count*/0,
 570                                        SSD_FULL_SIZE,
 571                                        5 * 60 * 1000);
 572
 573                 cam_periph_runccb(ccb, /*error_routine*/NULL, /*cam_flags*/0,
 574                                   /*sense_flags*/SF_RETRY_UA,
 575                                   &softc->device_stats);
 576
 577                 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 578                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) ==
 579                              CAM_SCSI_STATUS_ERROR) {
 580                                 int asc, ascq;
 581                                 int sense_key, error_code;
 582
 583                                 scsi_extract_sense(&ccb->csio.sense_data,
 584                                                    &error_code,
 585                                                    &sense_key,
 586                                                    &asc, &ascq);
 587                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
 588                                         scsi_sense_print(&ccb->csio);
 589                         } else {
 590                                 xpt_print(periph->path, "Synchronize cache "
 591                                     "failed, status == 0x%x, scsi status == "
 592                                     "0x%x\n", ccb->csio.ccb_h.status,
 593                                     ccb->csio.scsi_status);
 594                         }
 595                 }
 596
 597                 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 598                         cam_release_devq(ccb->ccb_h.path,
 599                                          /*relsim_flags*/0,
 600                                          /*reduction*/0,
 601                                          /*timeout*/0,
 602                                          /*getcount_only*/0);
 603
 604                 xpt_release_ccb(ccb);
 605
 606         }
 607
 608         if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0) {
 609                 if ((softc->quirks & DA_Q_NO_PREVENT) == 0)
 610                         daprevent(periph, PR_ALLOW);
 611                 /*
 612                  * If we've got removeable media, mark the blocksize as
 613                  * unavailable, since it could change when new media is
 614                  * inserted.
 615                  */
 616                 softc->device_stats.flags |= DEVSTAT_BS_UNAVAILABLE;
 617         }
 618
 619         /*
 620          * Don't compound any ref counting software bugs with more.
 621          */
 622         if (softc->flags & DA_FLAG_OPEN) {
 623                 softc->flags &= ~DA_FLAG_OPEN;
 624                 cam_periph_release(periph);
 625         } else {
 626                 xpt_print(periph->path,
 627                           "daclose() called on an already closed device!\n");
 628         }
 629         cam_periph_unhold(periph, 1);
 630         return (0);
 631 }
 632
 633 /*
 634  * Actually translate the requested transfer into one the physical driver
 635  * can understand.  The transfer is described by a buf and will include
 636  * only one physical transfer.
 637  */
 638 static int
 639 dastrategy(struct dev_strategy_args *ap)
 640 {
 641         cdev_t dev = ap->a_head.a_dev;
 642         struct bio *bio = ap->a_bio;
 643         struct buf *bp = bio->bio_buf;
 644         struct cam_periph *periph;
 645         struct da_softc *softc;
 646         u_int  unit;
 647         u_int  part;
 648
 649         unit = dkunit(dev);
 650         part = dkpart(dev);
 651         periph = cam_extend_get(daperiphs, unit);
 652         if (periph == NULL) {
 653                 bp->b_error = ENXIO;
 654                 goto bad;
 655         }
 656         softc = (struct da_softc *)periph->softc;
 657
 658         cam_periph_lock(periph);
 659
 660 #if 0
 661         /*
 662          * check it's not too big a transfer for our adapter
 663          */
 664         scsi_minphys(bp, &sd_switch);
 665 #endif
 666
 667         /*
 668          * Mask interrupts so that the pack cannot be invalidated until
 669          * after we are in the queue.  Otherwise, we might not properly
 670          * clean up one of the buffers.
 671          */
 672
 673         /*
 674          * If the device has been made invalid, error out
 675          */
 676         if ((softc->flags & DA_FLAG_PACK_INVALID)) {
 677                 cam_periph_unlock(periph);
 678                 bp->b_error = ENXIO;
 679                 goto bad;
 680         }
 681
 682         /*
 683          * Place it in the queue of disk activities for this disk
 684          */
 685         bioqdisksort(&softc->bio_queue, bio);
 686
 687         /*
 688          * Schedule ourselves for performing the work.
 689          */
 690         xpt_schedule(periph, /* XXX priority */1);
 691         cam_periph_unlock(periph);
 692
 693         return(0);
 694 bad:
 695         bp->b_flags |= B_ERROR;
 696
 697         /*
 698          * Correctly set the buf to indicate a completed xfer
 699          */
 700         bp->b_resid = bp->b_bcount;
 701         biodone(bio);
 702         return(0);
 703 }
 704
 705 static int
 706 dadump(struct dev_dump_args *ap)
 707 {
 708         cdev_t dev = ap->a_head.a_dev;
 709         struct      cam_periph *periph;
 710         struct      da_softc *softc;
 711         u_int       unit;
 712         long        blkcnt;
 713         vm_paddr_t  addr;
 714         struct      ccb_scsiio csio;
 715         int         dumppages = MAXDUMPPGS;
 716         int         i;
 717
 718         /* toss any characters present prior to dump */
 719         while (cncheckc() != -1)
 720                 ;
 721
 722         unit = dkunit(dev);
 723         periph = cam_extend_get(daperiphs, unit);
 724         if (periph == NULL) {
 725                 return (ENXIO);
 726         }
 727         softc = (struct da_softc *)periph->softc;
 728
 729         cam_periph_lock(periph);
 730         if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
 731                 cam_periph_unlock(periph);
 732                 return (ENXIO);
 733         }
 734
 735         addr = 0;       /* starting address */
 736         blkcnt = howmany(PAGE_SIZE, ap->a_secsize);
 737
 738         while (ap->a_count > 0) {
 739                 caddr_t va = NULL;
 740
 741                 if ((ap->a_count / blkcnt) < dumppages)
 742                         dumppages = ap->a_count / blkcnt;
 743
 744                 for (i = 0; i < dumppages; ++i) {
 745                         vm_paddr_t a = addr + (i * PAGE_SIZE);
 746                         if (is_physical_memory(a))
 747                                 va = pmap_kenter_temporary(trunc_page(a), i);
 748                         else
 749                                 va = pmap_kenter_temporary(trunc_page(0), i);
 750                 }
 751
 752                 xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
 753                 csio.ccb_h.flags |= CAM_POLLED;
 754                 csio.ccb_h.ccb_state = DA_CCB_DUMP;
 755                 scsi_read_write(&csio,
 756                                 /*retries*/1,
 757                                 dadone,
 758                                 MSG_ORDERED_Q_TAG,
 759                                 /*read*/FALSE,
 760                                 /*byte2*/0,
 761                                 /*minimum_cmd_size*/ softc->minimum_cmd_size,
 762                                 ap->a_blkno,
 763                                 blkcnt * dumppages,
 764                                 /*data_ptr*/(u_int8_t *) va,
 765                                 /*dxfer_len*/blkcnt * ap->a_secsize * dumppages,
 766                                 /*sense_len*/SSD_FULL_SIZE,
 767                                 DA_DEFAULT_TIMEOUT * 1000);
 768                 xpt_polled_action((union ccb *)&csio);
 769
 770                 if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 771                         kprintf("Aborting dump due to I/O error.\n");
 772                         if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
 773                              CAM_SCSI_STATUS_ERROR)
 774                                 scsi_sense_print(&csio);
 775                         else
 776                                 kprintf("status == 0x%x, scsi status == 0x%x\n",
 777                                        csio.ccb_h.status, csio.scsi_status);
 778                         return(EIO);
 779                 }
 780
 781                 if (dumpstatus(addr, (off_t)ap->a_count * softc->params.secsize) < 0)
 782                         return (EINTR);
 783
 784                 /* update block count */
 785                 ap->a_count -= blkcnt * dumppages;
 786                 ap->a_blkno += blkcnt * dumppages;
 787                 addr += PAGE_SIZE * dumppages;
 788         }
 789
 790         /*
 791          * Sync the disk cache contents to the physical media.
 792          */
 793         if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
 794
 795                 xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
 796                 csio.ccb_h.ccb_state = DA_CCB_DUMP;
 797                 scsi_synchronize_cache(&csio,
 798                                        /*retries*/1,
 799                                        /*cbfcnp*/dadone,
 800                                        MSG_SIMPLE_Q_TAG,
 801                                        /*begin_lba*/0,/* Cover the whole disk */
 802                                        /*lb_count*/0,
 803                                        SSD_FULL_SIZE,
 804                                        5 * 60 * 1000);
 805                 xpt_polled_action((union ccb *)&csio);
 806
 807                 if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 808                         if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
 809                              CAM_SCSI_STATUS_ERROR) {
 810                                 int asc, ascq;
 811                                 int sense_key, error_code;
 812
 813                                 scsi_extract_sense(&csio.sense_data,
 814                                                    &error_code,
 815                                                    &sense_key,
 816                                                    &asc, &ascq);
 817                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
 818                                         scsi_sense_print(&csio);
 819                         } else {
 820                                 xpt_print(periph->path, "Synchronize cache "
 821                                     "failed, status == 0x%x, scsi status == "
 822                                     "0x%x\n", csio.ccb_h.status,
 823                                     csio.scsi_status);
 824                         }
 825                 }
 826         }
 827         cam_periph_unlock(periph);
 828         return (0);
 829 }
 830
 831 static void
 832 dainit(void)
 833 {
 834         cam_status status;
 835
 836         /*
 837          * Create our extend array for storing the devices we attach to.
 838          */
 839         daperiphs = cam_extend_new();
 840         if (daperiphs == NULL) {
 841                 kprintf("da: Failed to alloc extend array!\n");
 842                 return;
 843         }
 844
 845         callout_init(&dasendorderedtag_ch);
 846
 847         /*
 848          * Install a global async callback.  This callback will
 849          * receive async callbacks like "new device found".
 850          */
 851         status = xpt_register_async(AC_FOUND_DEVICE, daasync, NULL, NULL);
 852
 853         if (status != CAM_REQ_CMP) {
 854                 kprintf("da: Failed to attach master async callback "
 855                        "due to status 0x%x!\n", status);
 856         } else if (da_send_ordered) {
 857
 858                 /* Register our shutdown event handler */
 859                 if ((EVENTHANDLER_REGISTER(shutdown_post_sync, dashutdown,
 860                                            NULL, SHUTDOWN_PRI_DEFAULT)) == NULL)
 861                     kprintf("dainit: shutdown event registration failed!\n");
 862         }
 863 }
 864
 865 static void
 866 daoninvalidate(struct cam_periph *periph)
 867 {
 868         struct da_softc *softc;
 869         struct bio *q_bio;
 870         struct buf *q_bp;
 871
 872         softc = (struct da_softc *)periph->softc;
 873
 874         /*
 875          * De-register any async callbacks.
 876          */
 877         xpt_register_async(0, daasync, periph, periph->path);
 878
 879         softc->flags |= DA_FLAG_PACK_INVALID;
 880
 881         /*
 882          * Return all queued I/O with ENXIO.
 883          * XXX Handle any transactions queued to the card
 884          *     with XPT_ABORT_CCB.
 885          */
 886         while ((q_bio = bioq_first(&softc->bio_queue)) != NULL){
 887                 bioq_remove(&softc->bio_queue, q_bio);
 888                 q_bp = q_bio->bio_buf;
 889                 q_bp->b_resid = q_bp->b_bcount;
 890                 q_bp->b_error = ENXIO;
 891                 q_bp->b_flags |= B_ERROR;
 892                 biodone(q_bio);
 893         }
 894         xpt_print(periph->path, "lost device\n");
 895 }
 896
 897 static void
 898 dacleanup(struct cam_periph *periph)
 899 {
 900         struct da_softc *softc;
 901
 902         softc = (struct da_softc *)periph->softc;
 903
 904         devstat_remove_entry(&softc->device_stats);
 905         cam_extend_release(daperiphs, periph->unit_number);
 906         xpt_print(periph->path, "removing device entry\n");
 907         /*
 908          * If we can't free the sysctl tree, oh well...
 909          */
 910         if ((softc->flags & DA_FLAG_SCTX_INIT) != 0
 911             && sysctl_ctx_free(&softc->sysctl_ctx) != 0) {
 912                 xpt_print(periph->path, "can't remove sysctl context\n");
 913         }
 914         periph->softc = NULL;
 915         if (softc->disk.d_rawdev) {
 916                 cam_periph_unlock(periph);
 917                 disk_destroy(&softc->disk);
 918                 cam_periph_lock(periph);
 919         }
 920
 921         callout_stop(&softc->sendordered_c);
 922         kfree(softc, M_DEVBUF);
 923 }
 924
 925 static void
 926 daasync(void *callback_arg, u_int32_t code,
 927         struct cam_path *path, void *arg)
 928 {
 929         struct cam_periph *periph;
 930
 931         periph = (struct cam_periph *)callback_arg;
 932
 933         switch (code) {
 934         case AC_FOUND_DEVICE:
 935         {
 936                 struct ccb_getdev *cgd;
 937                 struct cam_sim *sim;
 938                 cam_status status;
 939
 940                 cgd = (struct ccb_getdev *)arg;
 941                 if (cgd == NULL)
 942                         break;
 943
 944                 if (SID_TYPE(&cgd->inq_data) != T_DIRECT
 945                     && SID_TYPE(&cgd->inq_data) != T_RBC
 946                     && SID_TYPE(&cgd->inq_data) != T_OPTICAL)
 947                         break;
 948
 949                 /*
 950                  * Don't complain if a valid peripheral is already attached.
 951                  */
 952                 periph = cam_periph_find(cgd->ccb_h.path, "da");
 953                 if (periph && (periph->flags & CAM_PERIPH_INVALID) == 0)
 954                         break;
 955
 956                 /*
 957                  * Allocate a peripheral instance for
 958                  * this device and start the probe
 959                  * process.
 960                  */
 961                 sim = xpt_path_sim(cgd->ccb_h.path);
 962                 status = cam_periph_alloc(daregister, daoninvalidate,
 963                                           dacleanup, dastart,
 964                                           "da", CAM_PERIPH_BIO,
 965                                           cgd->ccb_h.path, daasync,
 966                                           AC_FOUND_DEVICE, cgd);
 967
 968                 if (status != CAM_REQ_CMP && status != CAM_REQ_INPROG) {
 969                         kprintf("daasync: Unable to attach to new device "
 970                                 "due to status 0x%x\n", status);
 971                 }
 972                 break;
 973         }
 974         case AC_SENT_BDR:
 975         case AC_BUS_RESET:
 976         {
 977                 struct da_softc *softc;
 978                 struct ccb_hdr *ccbh;
 979
 980                 softc = (struct da_softc *)periph->softc;
 981                 /*
 982                  * Don't fail on the expected unit attention
 983                  * that will occur.
 984                  */
 985                 softc->flags |= DA_FLAG_RETRY_UA;
 986                 LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le)
 987                         ccbh->ccb_state |= DA_CCB_RETRY_UA;
 988                 /* FALLTHROUGH*/
 989         }
 990         default:
 991                 cam_periph_async(periph, code, path, arg);
 992                 break;
 993         }
 994 }
 995
 996 static void
 997 dasysctlinit(void *context, int pending)
 998 {
 999         struct cam_periph *periph;
1000         struct da_softc *softc;
1001         char tmpstr[80], tmpstr2[80];
1002
1003         periph = (struct cam_periph *)context;
1004         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
1005                 return;
1006
1007         softc = (struct da_softc *)periph->softc;
1008         ksnprintf(tmpstr, sizeof(tmpstr), "CAM DA unit %d", periph->unit_number);
1009         ksnprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number);
1010
1011         sysctl_ctx_init(&softc->sysctl_ctx);
1012         softc->flags |= DA_FLAG_SCTX_INIT;
1013         softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
1014                 SYSCTL_STATIC_CHILDREN(_kern_cam_da), OID_AUTO, tmpstr2,
1015                 CTLFLAG_RD, 0, tmpstr);
1016         if (softc->sysctl_tree == NULL) {
1017                 kprintf("dasysctlinit: unable to allocate sysctl tree\n");
1018                 cam_periph_release(periph);
1019                 return;
1020         }
1021
1022         /*
1023          * Now register the sysctl handler, so the user can the value on
1024          * the fly.
1025          */
1026         SYSCTL_ADD_PROC(&softc->sysctl_ctx,SYSCTL_CHILDREN(softc->sysctl_tree),
1027                 OID_AUTO, "minimum_cmd_size", CTLTYPE_INT | CTLFLAG_RW,
1028                 &softc->minimum_cmd_size, 0, dacmdsizesysctl, "I",
1029                 "Minimum CDB size");
1030
1031         cam_periph_release(periph);
1032 }
1033
1034 static int
1035 dacmdsizesysctl(SYSCTL_HANDLER_ARGS)
1036 {
1037         int error, value;
1038
1039         value = *(int *)arg1;
1040
1041         error = sysctl_handle_int(oidp, &value, 0, req);
1042
1043         if ((error != 0)
1044          || (req->newptr == NULL))
1045                 return (error);
1046
1047         /*
1048          * Acceptable values here are 6, 10 or 12, or 16.
1049          */
1050         if (value < 6)
1051                 value = 6;
1052         else if ((value > 6)
1053               && (value <= 10))
1054                 value = 10;
1055         else if ((value > 10)
1056               && (value <= 12))
1057                 value = 12;
1058         else if (value > 12)
1059                 value = 16;
1060
1061         *(int *)arg1 = value;
1062
1063         return (0);
1064 }
1065
1066 static cam_status
1067 daregister(struct cam_periph *periph, void *arg)
1068 {
1069         struct da_softc *softc;
1070         struct ccb_pathinq cpi;
1071         struct ccb_getdev *cgd;
1072         char tmpstr[80];
1073         caddr_t match;
1074
1075         cgd = (struct ccb_getdev *)arg;
1076         if (periph == NULL) {
1077                 kprintf("daregister: periph was NULL!!\n");
1078                 return(CAM_REQ_CMP_ERR);
1079         }
1080
1081         if (cgd == NULL) {
1082                 kprintf("daregister: no getdev CCB, can't register device\n");
1083                 return(CAM_REQ_CMP_ERR);
1084         }
1085
1086         softc = kmalloc(sizeof(*softc), M_DEVBUF, M_INTWAIT | M_ZERO);
1087         LIST_INIT(&softc->pending_ccbs);
1088         softc->state = DA_STATE_PROBE;
1089         bioq_init(&softc->bio_queue);
1090         if (SID_IS_REMOVABLE(&cgd->inq_data))
1091                 softc->flags |= DA_FLAG_PACK_REMOVABLE;
1092         if ((cgd->inq_data.flags & SID_CmdQue) != 0)
1093                 softc->flags |= DA_FLAG_TAGGED_QUEUING;
1094
1095         periph->softc = softc;
1096
1097         cam_extend_set(daperiphs, periph->unit_number, periph);
1098
1099         /*
1100          * See if this device has any quirks.
1101          */
1102         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1103                                (caddr_t)da_quirk_table,
1104                                sizeof(da_quirk_table)/sizeof(*da_quirk_table),
1105                                sizeof(*da_quirk_table), scsi_inquiry_match);
1106
1107         if (match != NULL)
1108                 softc->quirks = ((struct da_quirk_entry *)match)->quirks;
1109         else
1110                 softc->quirks = DA_Q_NONE;
1111
1112         /*
1113          * Unconditionally disable the synchronize cache command for
1114          * usb attachments.  It's just impossible to determine if the
1115          * device supports it or not and if it doesn't the port can
1116          * brick.
1117          */
1118         if (strncmp(periph->sim->sim_name, "umass", 4) == 0) {
1119                 softc->quirks |= DA_Q_NO_SYNC_CACHE;
1120         }
1121
1122         TASK_INIT(&softc->sysctl_task, 0, dasysctlinit, periph);
1123
1124         /* Check if the SIM does not want 6 byte commands */
1125         xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
1126         cpi.ccb_h.func_code = XPT_PATH_INQ;
1127         xpt_action((union ccb *)&cpi);
1128         if (cpi.ccb_h.status == CAM_REQ_CMP && (cpi.hba_misc & PIM_NO_6_BYTE))
1129                 softc->quirks |= DA_Q_NO_6_BYTE;
1130
1131         /*
1132          * RBC devices don't have to support READ(6), only READ(10).
1133          */
1134         if (softc->quirks & DA_Q_NO_6_BYTE || SID_TYPE(&cgd->inq_data) == T_RBC)
1135                 softc->minimum_cmd_size = 10;
1136         else
1137                 softc->minimum_cmd_size = 6;
1138
1139         /*
1140          * Load the user's default, if any.
1141          */
1142         ksnprintf(tmpstr, sizeof(tmpstr), "kern.cam.da.%d.minimum_cmd_size",
1143                  periph->unit_number);
1144         TUNABLE_INT_FETCH(tmpstr, &softc->minimum_cmd_size);
1145
1146         /*
1147          * 6, 10, 12, and 16 are the currently permissible values.
1148          */
1149         if (softc->minimum_cmd_size < 6)
1150                 softc->minimum_cmd_size = 6;
1151         else if ((softc->minimum_cmd_size > 6)
1152               && (softc->minimum_cmd_size <= 10))
1153                 softc->minimum_cmd_size = 10;
1154         else if ((softc->minimum_cmd_size > 10)
1155               && (softc->minimum_cmd_size <= 12))
1156                 softc->minimum_cmd_size = 12;
1157         else if (softc->minimum_cmd_size > 12)
1158                 softc->minimum_cmd_size = 16;
1159
1160         /*
1161          * The DA driver supports a blocksize, but
1162          * we don't know the blocksize until we do
1163          * a read capacity.  So, set a flag to
1164          * indicate that the blocksize is
1165          * unavailable right now.  We'll clear the
1166          * flag as soon as we've done a read capacity.
1167          */
1168         devstat_add_entry(&softc->device_stats, "da",
1169                           periph->unit_number, 0,
1170                           DEVSTAT_BS_UNAVAILABLE,
1171                           SID_TYPE(&cgd->inq_data) | DEVSTAT_TYPE_IF_SCSI,
1172                           DEVSTAT_PRIORITY_DISK);
1173
1174         /*
1175          * Register this media as a disk
1176          */
1177
1178         CAM_SIM_UNLOCK(periph->sim);
1179         disk_create(periph->unit_number, &softc->disk, &da_ops);
1180         softc->disk.d_rawdev->si_iosize_max = MAXPHYS;
1181         CAM_SIM_LOCK(periph->sim);
1182
1183         /*
1184          * Add async callbacks for bus reset and
1185          * bus device reset calls.  I don't bother
1186          * checking if this fails as, in most cases,
1187          * the system will function just fine without
1188          * them and the only alternative would be to
1189          * not attach the device on failure.
1190          */
1191         xpt_register_async(AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE,
1192                            daasync, periph, periph->path);
1193
1194         /*
1195          * Take an exclusive refcount on the periph while dastart is called
1196          * to finish the probe.  The reference will be dropped in dadone at
1197          * the end of probe.
1198          */
1199         cam_periph_hold(periph, 0);
1200         xpt_schedule(periph, /*priority*/5);
1201
1202         /*
1203          * Schedule a periodic event to occasionally send an
1204          * ordered tag to a device.
1205          */
1206         callout_init(&softc->sendordered_c);
1207         callout_reset(&softc->sendordered_c,
1208             (DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL,
1209             dasendorderedtag, softc);
1210
1211         return(CAM_REQ_CMP);
1212 }
1213
1214 static void
1215 dastart(struct cam_periph *periph, union ccb *start_ccb)
1216 {
1217         struct da_softc *softc;
1218
1219         softc = (struct da_softc *)periph->softc;
1220
1221         switch (softc->state) {
1222         case DA_STATE_NORMAL:
1223         {
1224                 /* Pull a buffer from the queue and get going on it */
1225                 struct bio *bio;
1226                 struct buf *bp;
1227                 u_int8_t tag_code;
1228
1229                 /*
1230                  * See if there is a buf with work for us to do..
1231                  */
1232                 bio = bioq_first(&softc->bio_queue);
1233                 if (periph->immediate_priority <= periph->pinfo.priority) {
1234                         CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1235                                         ("queuing for immediate ccb\n"));
1236                         start_ccb->ccb_h.ccb_state = DA_CCB_WAITING;
1237                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1238                                           periph_links.sle);
1239                         periph->immediate_priority = CAM_PRIORITY_NONE;
1240                         wakeup(&periph->ccb_list);
1241                         if (bio != NULL) {
1242                                 /*
1243                                  * Have more work to do, so ensure we stay
1244                                  * scheduled
1245                                  */
1246                                 xpt_schedule(periph, /* XXX priority */1);
1247                         }
1248                         break;
1249                 }
1250                 if (bio == NULL) {
1251                         xpt_release_ccb(start_ccb);
1252                         break;
1253                 }
1254
1255                 /*
1256                  * We can queue new work.
1257                  */
1258                 bioq_remove(&softc->bio_queue, bio);
1259                 bp = bio->bio_buf;
1260
1261                 devstat_start_transaction(&softc->device_stats);
1262
1263                 if ((bp->b_flags & B_ORDERED) != 0 ||
1264                     (softc->flags & DA_FLAG_NEED_OTAG) != 0) {
1265                         softc->flags &= ~DA_FLAG_NEED_OTAG;
1266                         softc->ordered_tag_count++;
1267                         tag_code = MSG_ORDERED_Q_TAG;
1268                 } else {
1269                         tag_code = MSG_SIMPLE_Q_TAG;
1270                 }
1271
1272                 switch(bp->b_cmd) {
1273                 case BUF_CMD_READ:
1274                 case BUF_CMD_WRITE:
1275                         /*
1276                          * Block read/write op
1277                          */
1278                         KKASSERT(bio->bio_offset % softc->params.secsize == 0);
1279
1280                         scsi_read_write(
1281                                 &start_ccb->csio,
1282                                 da_retry_count,         /* retries */
1283                                 dadone,
1284                                 tag_code,
1285                                 (bp->b_cmd == BUF_CMD_READ),
1286                                 0,                      /* byte2 */
1287                                 softc->minimum_cmd_size,
1288                                 bio->bio_offset / softc->params.secsize,
1289                                 bp->b_bcount / softc->params.secsize,
1290                                 bp->b_data,
1291                                 bp->b_bcount,
1292                                 SSD_FULL_SIZE,          /* sense_len */
1293                                 da_default_timeout * 1000
1294                         );
1295                         break;
1296                 case BUF_CMD_FLUSH:
1297                         /*
1298                          * Silently complete a flush request if the device
1299                          * cannot handle it.
1300                          */
1301                         if (softc->quirks & DA_Q_NO_SYNC_CACHE) {
1302                                 xpt_release_ccb(start_ccb);
1303                                 start_ccb = NULL;
1304                                 devstat_end_transaction_buf(
1305                                         &softc->device_stats, bp);
1306                                 biodone(bio);
1307                         } else {
1308                                 scsi_synchronize_cache(
1309                                         &start_ccb->csio,
1310                                         1,              /* retries */
1311                                         dadone,         /* cbfcnp */
1312                                         MSG_SIMPLE_Q_TAG,
1313                                         0,              /* lba */
1314                                         0,              /* count (whole disk) */
1315                                         SSD_FULL_SIZE,
1316                                         da_default_timeout*1000 /* timeout */
1317                                 );
1318                         }
1319                         break;
1320                 default:
1321                         xpt_release_ccb(start_ccb);
1322                         start_ccb = NULL;
1323                         panic("dastart: unrecognized bio cmd %d", bp->b_cmd);
1324                         break; /* NOT REACHED */
1325                 }
1326
1327                 /*
1328                  * Block out any asyncronous callbacks
1329                  * while we touch the pending ccb list.
1330                  */
1331                 if (start_ccb) {
1332                         start_ccb->ccb_h.ccb_state = DA_CCB_BUFFER_IO;
1333                         LIST_INSERT_HEAD(&softc->pending_ccbs,
1334                                          &start_ccb->ccb_h, periph_links.le);
1335                         softc->outstanding_cmds++;
1336
1337                         /* We expect a unit attention from this device */
1338                         if ((softc->flags & DA_FLAG_RETRY_UA) != 0) {
1339                                 start_ccb->ccb_h.ccb_state |= DA_CCB_RETRY_UA;
1340                                 softc->flags &= ~DA_FLAG_RETRY_UA;
1341                         }
1342
1343                         start_ccb->ccb_h.ccb_bio = bio;
1344                         xpt_action(start_ccb);
1345                 }
1346
1347                 /*
1348                  * Be sure we stay scheduled if we have more work to do.
1349                  */
1350                 bio = bioq_first(&softc->bio_queue);
1351                 if (bio != NULL)
1352                         xpt_schedule(periph, 1);
1353                 break;
1354         }
1355         case DA_STATE_PROBE:
1356         {
1357                 struct ccb_scsiio *csio;
1358                 struct scsi_read_capacity_data *rcap;
1359
1360                 rcap = kmalloc(sizeof(*rcap), M_SCSIDA, M_INTWAIT | M_ZERO);
1361                 csio = &start_ccb->csio;
1362                 scsi_read_capacity(csio,
1363                                    /*retries*/4,
1364                                    dadone,
1365                                    MSG_SIMPLE_Q_TAG,
1366                                    rcap,
1367                                    SSD_FULL_SIZE,
1368                                    /*timeout*/5000);
1369                 start_ccb->ccb_h.ccb_bio = NULL;
1370                 start_ccb->ccb_h.ccb_state = DA_CCB_PROBE;
1371                 xpt_action(start_ccb);
1372                 break;
1373         }
1374         case DA_STATE_PROBE2:
1375         {
1376                 struct ccb_scsiio *csio;
1377                 struct scsi_read_capacity_data_16 *rcaplong;
1378
1379                 rcaplong = kmalloc(sizeof(*rcaplong), M_SCSIDA,
1380                                    M_INTWAIT | M_ZERO);
1381                 if (rcaplong == NULL) {
1382                         kprintf("dastart: Couldn't allocate read_capacity\n");
1383                         /* da_free_periph??? */
1384                         break;
1385                 }
1386                 csio = &start_ccb->csio;
1387                 scsi_read_capacity_16(csio,
1388                                     /*retries*/ 4,
1389                                     /*cbfcnp*/ dadone,
1390                                     /*tag_action*/ MSG_SIMPLE_Q_TAG,
1391                                     /*lba*/ 0,
1392                                     /*reladr*/ 0,
1393                                     /*pmi*/ 0,
1394                                     rcaplong,
1395                                     /*sense_len*/ SSD_FULL_SIZE,
1396                                     /*timeout*/ 60000);
1397                 start_ccb->ccb_h.ccb_bio = NULL;
1398                 start_ccb->ccb_h.ccb_state = DA_CCB_PROBE2;
1399                 xpt_action(start_ccb);
1400                 break;
1401         }
1402         }
1403 }
1404
1405 static int
1406 cmd6workaround(union ccb *ccb)
1407 {
1408         struct scsi_rw_6 cmd6;
1409         struct scsi_rw_10 *cmd10;
1410         struct da_softc *softc;
1411         u_int8_t *cdb;
1412         int frozen;
1413
1414         cdb = ccb->csio.cdb_io.cdb_bytes;
1415
1416         /* Translation only possible if CDB is an array and cmd is R/W6 */
1417         if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0 ||
1418             (*cdb != READ_6 && *cdb != WRITE_6))
1419                 return 0;
1420
1421         xpt_print(ccb->ccb_h.path, "READ(6)/WRITE(6) not supported, "
1422             "increasing minimum_cmd_size to 10.\n");
1423         softc = (struct da_softc *)xpt_path_periph(ccb->ccb_h.path)->softc;
1424         softc->minimum_cmd_size = 10;
1425
1426         bcopy(cdb, &cmd6, sizeof(struct scsi_rw_6));
1427         cmd10 = (struct scsi_rw_10 *)cdb;
1428         cmd10->opcode = (cmd6.opcode == READ_6) ? READ_10 : WRITE_10;
1429         cmd10->byte2 = 0;
1430         scsi_ulto4b(scsi_3btoul(cmd6.addr), cmd10->addr);
1431         cmd10->reserved = 0;
1432         scsi_ulto2b(cmd6.length, cmd10->length);
1433         cmd10->control = cmd6.control;
1434         ccb->csio.cdb_len = sizeof(*cmd10);
1435
1436         /* Requeue request, unfreezing queue if necessary */
1437         frozen = (ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
1438         ccb->ccb_h.status = CAM_REQUEUE_REQ;
1439         xpt_action(ccb);
1440         if (frozen) {
1441                 cam_release_devq(ccb->ccb_h.path,
1442                                  /*relsim_flags*/0,
1443                                  /*reduction*/0,
1444                                  /*timeout*/0,
1445                                  /*getcount_only*/0);
1446         }
1447         return (ERESTART);
1448 }
1449
1450 static void
1451 dadone(struct cam_periph *periph, union ccb *done_ccb)
1452 {
1453         struct da_softc *softc;
1454         struct ccb_scsiio *csio;
1455
1456         softc = (struct da_softc *)periph->softc;
1457         csio = &done_ccb->csio;
1458         switch (csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) {
1459         case DA_CCB_BUFFER_IO:
1460         {
1461                 struct buf *bp;
1462                 struct bio *bio;
1463
1464                 bio = (struct bio *)done_ccb->ccb_h.ccb_bio;
1465                 bp = bio->bio_buf;
1466                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1467                         int error;
1468                         int sf;
1469
1470                         if ((csio->ccb_h.ccb_state & DA_CCB_RETRY_UA) != 0)
1471                                 sf = SF_RETRY_UA;
1472                         else
1473                                 sf = 0;
1474
1475                         error = daerror(done_ccb, CAM_RETRY_SELTO, sf);
1476                         if (error == ERESTART) {
1477                                 /*
1478                                  * A retry was scheuled, so
1479                                  * just return.
1480                                  */
1481                                 return;
1482                         }
1483                         if (error != 0) {
1484                                 struct bio *q_bio;
1485                                 struct buf *q_bp;
1486
1487                                 if (error == ENXIO) {
1488                                         /*
1489                                          * Catastrophic error.  Mark our pack as
1490                                          * invalid.
1491                                          */
1492                                         /*
1493                                          * XXX See if this is really a media
1494                                          * XXX change first?
1495                                          */
1496                                         xpt_print(periph->path,
1497                                             "Invalidating pack\n");
1498                                         softc->flags |= DA_FLAG_PACK_INVALID;
1499                                 }
1500
1501                                 /*
1502                                  * return all queued I/O with EIO, so that
1503                                  * the client can retry these I/Os in the
1504                                  * proper order should it attempt to recover.
1505                                  */
1506                                 while ((q_bio = bioq_first(&softc->bio_queue))
1507                                         != NULL) {
1508                                         bioq_remove(&softc->bio_queue, q_bio);
1509                                         q_bp = q_bio->bio_buf;
1510                                         q_bp->b_resid = q_bp->b_bcount;
1511                                         q_bp->b_error = EIO;
1512                                         q_bp->b_flags |= B_ERROR;
1513                                         biodone(q_bio);
1514                                 }
1515                                 bp->b_error = error;
1516                                 bp->b_resid = bp->b_bcount;
1517                                 bp->b_flags |= B_ERROR;
1518                         } else {
1519                                 bp->b_resid = csio->resid;
1520                                 bp->b_error = 0;
1521                                 if (bp->b_resid != 0)
1522                                         bp->b_flags |= B_ERROR;
1523                         }
1524                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1525                                 cam_release_devq(done_ccb->ccb_h.path,
1526                                                  /*relsim_flags*/0,
1527                                                  /*reduction*/0,
1528                                                  /*timeout*/0,
1529                                                  /*getcount_only*/0);
1530                 } else {
1531                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1532                                 panic("REQ_CMP with QFRZN");
1533                         bp->b_resid = csio->resid;
1534                         if (csio->resid > 0)
1535                                 bp->b_flags |= B_ERROR;
1536                 }
1537
1538                 /*
1539                  * Block out any asyncronous callbacks
1540                  * while we touch the pending ccb list.
1541                  */
1542                 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
1543                 softc->outstanding_cmds--;
1544                 if (softc->outstanding_cmds == 0)
1545                         softc->flags |= DA_FLAG_WENT_IDLE;
1546
1547                 devstat_end_transaction_buf(&softc->device_stats, bp);
1548                 biodone(bio);
1549                 break;
1550         }
1551         case DA_CCB_PROBE:
1552         case DA_CCB_PROBE2:
1553         {
1554                 struct     scsi_read_capacity_data *rdcap;
1555                 struct     scsi_read_capacity_data_16 *rcaplong;
1556                 char       announce_buf[80];
1557
1558                 rdcap = NULL;
1559                 rcaplong = NULL;
1560                 if (softc->state == DA_STATE_PROBE)
1561                         rdcap =(struct scsi_read_capacity_data *)csio->data_ptr;
1562                 else
1563                         rcaplong = (struct scsi_read_capacity_data_16 *)
1564                                     csio->data_ptr;
1565
1566                 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
1567                         struct disk_params *dp;
1568                         uint32_t block_size;
1569                         uint64_t maxsector;
1570
1571                         if (softc->state == DA_STATE_PROBE) {
1572                                 block_size = scsi_4btoul(rdcap->length);
1573                                 maxsector = scsi_4btoul(rdcap->addr);
1574
1575                                 /*
1576                                  * According to SBC-2, if the standard 10
1577                                  * byte READ CAPACITY command returns 2^32,
1578                                  * we should issue the 16 byte version of
1579                                  * the command, since the device in question
1580                                  * has more sectors than can be represented
1581                                  * with the short version of the command.
1582                                  */
1583                                 if (maxsector == 0xffffffff) {
1584                                         softc->state = DA_STATE_PROBE2;
1585                                         kfree(rdcap, M_SCSIDA);
1586                                         xpt_release_ccb(done_ccb);
1587                                         xpt_schedule(periph, /*priority*/5);
1588                                         return;
1589                                 }
1590                         } else {
1591                                 block_size = scsi_4btoul(rcaplong->length);
1592                                 maxsector = scsi_8btou64(rcaplong->addr);
1593                         }
1594                         dasetgeom(periph, block_size, maxsector);
1595                         dp = &softc->params;
1596                         ksnprintf(announce_buf, sizeof(announce_buf),
1597                                 "%juMB (%ju %u byte sectors: %dH %dS/T %dC)",
1598                                 (uintmax_t) (((uintmax_t)dp->secsize *
1599                                 dp->sectors) / (1024*1024)),
1600                                 (uintmax_t)dp->sectors,
1601                                 dp->secsize, dp->heads, dp->secs_per_track,
1602                                 dp->cylinders);
1603                 } else {
1604                         int     error;
1605
1606                         announce_buf[0] = '\0';
1607
1608                         /*
1609                          * Retry any UNIT ATTENTION type errors.  They
1610                          * are expected at boot.
1611                          */
1612                         error = daerror(done_ccb, CAM_RETRY_SELTO,
1613                                         SF_RETRY_UA|SF_NO_PRINT);
1614                         if (error == ERESTART) {
1615                                 /*
1616                                  * A retry was scheuled, so
1617                                  * just return.
1618                                  */
1619                                 return;
1620                         } else if (error != 0) {
1621                                 struct scsi_sense_data *sense;
1622                                 int asc, ascq;
1623                                 int sense_key, error_code;
1624                                 int have_sense;
1625                                 cam_status status;
1626                                 struct ccb_getdev cgd;
1627
1628                                 /* Don't wedge this device's queue */
1629                                 status = done_ccb->ccb_h.status;
1630                                 if ((status & CAM_DEV_QFRZN) != 0)
1631                                         cam_release_devq(done_ccb->ccb_h.path,
1632                                                          /*relsim_flags*/0,
1633                                                          /*reduction*/0,
1634                                                          /*timeout*/0,
1635                                                          /*getcount_only*/0);
1636
1637
1638                                 xpt_setup_ccb(&cgd.ccb_h,
1639                                               done_ccb->ccb_h.path,
1640                                               /* priority */ 1);
1641                                 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
1642                                 xpt_action((union ccb *)&cgd);
1643
1644                                 if (((csio->ccb_h.flags & CAM_SENSE_PHYS) != 0)
1645                                  || ((csio->ccb_h.flags & CAM_SENSE_PTR) != 0)
1646                                  || ((status & CAM_AUTOSNS_VALID) == 0))
1647                                         have_sense = FALSE;
1648                                 else
1649                                         have_sense = TRUE;
1650
1651                                 if (have_sense) {
1652                                         sense = &csio->sense_data;
1653                                         scsi_extract_sense(sense, &error_code,
1654                                                            &sense_key,
1655                                                            &asc, &ascq);
1656                                 }
1657                                 /*
1658                                  * Attach to anything that claims to be a
1659                                  * direct access or optical disk device,
1660                                  * as long as it doesn't return a "Logical
1661                                  * unit not supported" (0x25) error.
1662                                  */
1663                                 if ((have_sense) && (asc != 0x25)
1664                                  && (error_code == SSD_CURRENT_ERROR)) {
1665                                         const char *sense_key_desc;
1666                                         const char *asc_desc;
1667
1668                                         scsi_sense_desc(sense_key, asc, ascq,
1669                                                         &cgd.inq_data,
1670                                                         &sense_key_desc,
1671                                                         &asc_desc);
1672                                         ksnprintf(announce_buf,
1673                                             sizeof(announce_buf),
1674                                                 "Attempt to query device "
1675                                                 "size failed: %s, %s",
1676                                                 sense_key_desc,
1677                                                 asc_desc);
1678                                 } else {
1679                                         if (have_sense)
1680                                                 scsi_sense_print(
1681                                                         &done_ccb->csio);
1682                                         else {
1683                                                 xpt_print(periph->path,
1684                                                     "got CAM status %#x\n",
1685                                                     done_ccb->ccb_h.status);
1686                                         }
1687
1688                                         xpt_print(periph->path, "fatal error, "
1689                                             "failed to attach to device\n");
1690
1691                                         /*
1692                                          * Free up resources.
1693                                          */
1694                                         cam_periph_invalidate(periph);
1695                                 }
1696                         }
1697                 }
1698                 kfree(csio->data_ptr, M_SCSIDA);
1699                 if (announce_buf[0] != '\0') {
1700                         xpt_announce_periph(periph, announce_buf);
1701                         /*
1702                          * Create our sysctl variables, now that we know
1703                          * we have successfully attached.
1704                          */
1705                         taskqueue_enqueue(taskqueue_thread[mycpuid],
1706                             &softc->sysctl_task);
1707                 }
1708                 softc->state = DA_STATE_NORMAL;
1709                 /*
1710                  * Since our peripheral may be invalidated by an error
1711                  * above or an external event, we must release our CCB
1712                  * before releasing the probe lock on the peripheral.
1713                  * The peripheral will only go away once the last lock
1714                  * is removed, and we need it around for the CCB release
1715                  * operation.
1716                  */
1717                 xpt_release_ccb(done_ccb);
1718                 cam_periph_unhold(periph, 0);
1719                 return;
1720         }
1721         case DA_CCB_WAITING:
1722         {
1723                 /* Caller will release the CCB */
1724                 wakeup(&done_ccb->ccb_h.cbfcnp);
1725                 return;
1726         }
1727         case DA_CCB_DUMP:
1728                 /* No-op.  We're polling */
1729                 return;
1730         default:
1731                 break;
1732         }
1733         xpt_release_ccb(done_ccb);
1734 }
1735
1736 static int
1737 daerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
1738 {
1739         struct da_softc   *softc;
1740         struct cam_periph *periph;
1741         int error;
1742
1743         periph = xpt_path_periph(ccb->ccb_h.path);
1744         softc = (struct da_softc *)periph->softc;
1745
1746         /*
1747          * Automatically detect devices that do not support
1748          * READ(6)/WRITE(6) and upgrade to using 10 byte cdbs.
1749          */
1750         error = 0;
1751         if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INVALID) {
1752                 error = cmd6workaround(ccb);
1753         } else if (((ccb->ccb_h.status & CAM_STATUS_MASK) ==
1754                    CAM_SCSI_STATUS_ERROR)
1755          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)
1756          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
1757          && ((ccb->ccb_h.flags & CAM_SENSE_PHYS) == 0)
1758          && ((ccb->ccb_h.flags & CAM_SENSE_PTR) == 0)) {
1759                 int sense_key, error_code, asc, ascq;
1760
1761                 scsi_extract_sense(&ccb->csio.sense_data,
1762                                    &error_code, &sense_key, &asc, &ascq);
1763                 if (sense_key == SSD_KEY_ILLEGAL_REQUEST)
1764                         error = cmd6workaround(ccb);
1765         }
1766         if (error == ERESTART)
1767                 return (ERESTART);
1768
1769         /*
1770          * XXX
1771          * Until we have a better way of doing pack validation,
1772          * don't treat UAs as errors.
1773          */
1774         sense_flags |= SF_RETRY_UA;
1775         return(cam_periph_error(ccb, cam_flags, sense_flags,
1776                                 &softc->saved_ccb));
1777 }
1778
1779 static void
1780 daprevent(struct cam_periph *periph, int action)
1781 {
1782         struct  da_softc *softc;
1783         union   ccb *ccb;
1784         int     error;
1785
1786         softc = (struct da_softc *)periph->softc;
1787
1788         if (((action == PR_ALLOW)
1789           && (softc->flags & DA_FLAG_PACK_LOCKED) == 0)
1790          || ((action == PR_PREVENT)
1791           && (softc->flags & DA_FLAG_PACK_LOCKED) != 0)) {
1792                 return;
1793         }
1794
1795         ccb = cam_periph_getccb(periph, /*priority*/1);
1796
1797         scsi_prevent(&ccb->csio,
1798                      /*retries*/1,
1799                      /*cbcfp*/dadone,
1800                      MSG_SIMPLE_Q_TAG,
1801                      action,
1802                      SSD_FULL_SIZE,
1803                      5000);
1804
1805         error = cam_periph_runccb(ccb, /*error_routine*/NULL, CAM_RETRY_SELTO,
1806                                   SF_RETRY_UA, &softc->device_stats);
1807
1808         if (error == 0) {
1809                 if (action == PR_ALLOW)
1810                         softc->flags &= ~DA_FLAG_PACK_LOCKED;
1811                 else
1812                         softc->flags |= DA_FLAG_PACK_LOCKED;
1813         }
1814
1815         xpt_release_ccb(ccb);
1816 }
1817
1818 static int
1819 dagetcapacity(struct cam_periph *periph)
1820 {
1821         struct da_softc *softc;
1822         union ccb *ccb;
1823         struct scsi_read_capacity_data *rcap;
1824         struct scsi_read_capacity_data_16 *rcaplong;
1825         uint32_t block_len;
1826         uint64_t maxsector;
1827         int error;
1828
1829         softc = (struct da_softc *)periph->softc;
1830         block_len = 0;
1831         maxsector = 0;
1832         error = 0;
1833
1834         /* Do a read capacity */
1835         rcap = (struct scsi_read_capacity_data *)kmalloc(sizeof(*rcaplong),
1836                                                          M_SCSIDA, M_INTWAIT);
1837
1838         ccb = cam_periph_getccb(periph, /*priority*/1);
1839         scsi_read_capacity(&ccb->csio,
1840                            /*retries*/4,
1841                            /*cbfncp*/dadone,
1842                            MSG_SIMPLE_Q_TAG,
1843                            rcap,
1844                            SSD_FULL_SIZE,
1845                            /*timeout*/60000);
1846         ccb->ccb_h.ccb_bio = NULL;
1847
1848         error = cam_periph_runccb(ccb, daerror,
1849                                   /*cam_flags*/CAM_RETRY_SELTO,
1850                                   /*sense_flags*/SF_RETRY_UA,
1851                                   &softc->device_stats);
1852
1853         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1854                 cam_release_devq(ccb->ccb_h.path,
1855                                  /*relsim_flags*/0,
1856                                  /*reduction*/0,
1857                                  /*timeout*/0,
1858                                  /*getcount_only*/0);
1859
1860         if (error == 0) {
1861                 block_len = scsi_4btoul(rcap->length);
1862                 maxsector = scsi_4btoul(rcap->addr);
1863
1864                 if (maxsector != 0xffffffff)
1865                         goto done;
1866         } else
1867                 goto done;
1868
1869         rcaplong = (struct scsi_read_capacity_data_16 *)rcap;
1870
1871         scsi_read_capacity_16(&ccb->csio,
1872                               /*retries*/ 4,
1873                               /*cbfcnp*/ dadone,
1874                               /*tag_action*/ MSG_SIMPLE_Q_TAG,
1875                               /*lba*/ 0,
1876                               /*reladr*/ 0,
1877                               /*pmi*/ 0,
1878                               rcaplong,
1879                               /*sense_len*/ SSD_FULL_SIZE,
1880                               /*timeout*/ 60000);
1881         ccb->ccb_h.ccb_bio = NULL;
1882
1883         error = cam_periph_runccb(ccb, daerror,
1884                                   /*cam_flags*/CAM_RETRY_SELTO,
1885                                   /*sense_flags*/SF_RETRY_UA,
1886                                   &softc->device_stats);
1887
1888         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1889                 cam_release_devq(ccb->ccb_h.path,
1890                                  /*relsim_flags*/0,
1891                                  /*reduction*/0,
1892                                  /*timeout*/0,
1893                                  /*getcount_only*/0);
1894
1895         if (error == 0) {
1896                 block_len = scsi_4btoul(rcaplong->length);
1897                 maxsector = scsi_8btou64(rcaplong->addr);
1898         }
1899
1900 done:
1901
1902         if (error == 0)
1903                 dasetgeom(periph, block_len, maxsector);
1904
1905         xpt_release_ccb(ccb);
1906
1907         kfree(rcap, M_SCSIDA);
1908
1909         return (error);
1910 }
1911
1912 static void
1913 dasetgeom(struct cam_periph *periph, uint32_t block_len, uint64_t maxsector)
1914 {
1915         struct ccb_calc_geometry ccg;
1916         struct da_softc *softc;
1917         struct disk_params *dp;
1918
1919         softc = (struct da_softc *)periph->softc;
1920
1921         dp = &softc->params;
1922         dp->secsize = block_len;
1923         dp->sectors = maxsector + 1;
1924         /*
1925          * Have the controller provide us with a geometry
1926          * for this disk.  The only time the geometry
1927          * matters is when we boot and the controller
1928          * is the only one knowledgeable enough to come
1929          * up with something that will make this a bootable
1930          * device.
1931          */
1932         xpt_setup_ccb(&ccg.ccb_h, periph->path, /*priority*/1);
1933         ccg.ccb_h.func_code = XPT_CALC_GEOMETRY;
1934         ccg.block_size = dp->secsize;
1935         ccg.volume_size = dp->sectors;
1936         ccg.heads = 0;
1937         ccg.secs_per_track = 0;
1938         ccg.cylinders = 0;
1939         xpt_action((union ccb*)&ccg);
1940         if ((ccg.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1941                 /*
1942                  * We don't know what went wrong here- but just pick
1943                  * a geometry so we don't have nasty things like divide
1944                  * by zero.
1945                  */
1946                 dp->heads = 255;
1947                 dp->secs_per_track = 255;
1948                 dp->cylinders = dp->sectors / (255 * 255);
1949                 if (dp->cylinders == 0) {
1950                         dp->cylinders = 1;
1951                 }
1952         } else {
1953                 dp->heads = ccg.heads;
1954                 dp->secs_per_track = ccg.secs_per_track;
1955                 dp->cylinders = ccg.cylinders;
1956         }
1957 }
1958
1959 static void
1960 dasendorderedtag(void *arg)
1961 {
1962         struct da_softc *softc = arg;
1963
1964         if (da_send_ordered) {
1965                 if ((softc->ordered_tag_count == 0)
1966                  && ((softc->flags & DA_FLAG_WENT_IDLE) == 0)) {
1967                         softc->flags |= DA_FLAG_NEED_OTAG;
1968                 }
1969                 if (softc->outstanding_cmds > 0)
1970                         softc->flags &= ~DA_FLAG_WENT_IDLE;
1971
1972                 softc->ordered_tag_count = 0;
1973         }
1974         /* Queue us up again */
1975         callout_reset(&softc->sendordered_c,
1976             (DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL,
1977             dasendorderedtag, softc);
1978 }
1979
1980 /*
1981  * Step through all DA peripheral drivers, and if the device is still open,
1982  * sync the disk cache to physical media.
1983  */
1984 static void
1985 dashutdown(void * arg, int howto)
1986 {
1987         struct cam_periph *periph;
1988         struct da_softc *softc;
1989
1990         TAILQ_FOREACH(periph, &dadriver.units, unit_links) {
1991                 union ccb ccb;
1992
1993                 cam_periph_lock(periph);
1994                 softc = (struct da_softc *)periph->softc;
1995
1996                 /*
1997                  * We only sync the cache if the drive is still open, and
1998                  * if the drive is capable of it..
1999                  */
2000                 if (((softc->flags & DA_FLAG_OPEN) == 0)
2001                  || (softc->quirks & DA_Q_NO_SYNC_CACHE)) {
2002                         cam_periph_unlock(periph);
2003                         continue;
2004                 }
2005
2006                 xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/1);
2007
2008                 ccb.ccb_h.ccb_state = DA_CCB_DUMP;
2009                 scsi_synchronize_cache(&ccb.csio,
2010                                        /*retries*/1,
2011                                        /*cbfcnp*/dadone,
2012                                        MSG_SIMPLE_Q_TAG,
2013                                        /*begin_lba*/0, /* whole disk */
2014                                        /*lb_count*/0,
2015                                        SSD_FULL_SIZE,
2016                                        60 * 60 * 1000);
2017
2018                 xpt_polled_action(&ccb);
2019
2020                 if ((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
2021                         if (((ccb.ccb_h.status & CAM_STATUS_MASK) ==
2022                              CAM_SCSI_STATUS_ERROR)
2023                          && (ccb.csio.scsi_status == SCSI_STATUS_CHECK_COND)){
2024                                 int error_code, sense_key, asc, ascq;
2025
2026                                 scsi_extract_sense(&ccb.csio.sense_data,
2027                                                    &error_code, &sense_key,
2028                                                    &asc, &ascq);
2029
2030                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
2031                                         scsi_sense_print(&ccb.csio);
2032                         } else {
2033                                 xpt_print(periph->path, "Synchronize "
2034                                     "cache failed, status == 0x%x, scsi status "
2035                                     "== 0x%x\n", ccb.ccb_h.status,
2036                                     ccb.csio.scsi_status);
2037                         }
2038                 }
2039
2040                 if ((ccb.ccb_h.status & CAM_DEV_QFRZN) != 0)
2041                         cam_release_devq(ccb.ccb_h.path,
2042                                          /*relsim_flags*/0,
2043                                          /*reduction*/0,
2044                                          /*timeout*/0,
2045                                          /*getcount_only*/0);
2046
2047                 cam_periph_unlock(periph);
2048         }
2049 }
2050
2051 #else /* !_KERNEL */
2052
2053 /*
2054  * XXX This is only left out of the kernel build to silence warnings.  If,
2055  * for some reason this function is used in the kernel, the ifdefs should
2056  * be moved so it is included both in the kernel and userland.
2057  */
2058 void
2059 scsi_format_unit(struct ccb_scsiio *csio, u_int32_t retries,
2060                  void (*cbfcnp)(struct cam_periph *, union ccb *),
2061                  u_int8_t tag_action, u_int8_t byte2, u_int16_t ileave,
2062                  u_int8_t *data_ptr, u_int32_t dxfer_len, u_int8_t sense_len,
2063                  u_int32_t timeout)
2064 {
2065         struct scsi_format_unit *scsi_cmd;
2066
2067         scsi_cmd = (struct scsi_format_unit *)&csio->cdb_io.cdb_bytes;
2068         scsi_cmd->opcode = FORMAT_UNIT;
2069         scsi_cmd->byte2 = byte2;
2070         scsi_ulto2b(ileave, scsi_cmd->interleave);
2071
2072         cam_fill_csio(csio,
2073                       retries,
2074                       cbfcnp,
2075                       /*flags*/ (dxfer_len > 0) ? CAM_DIR_OUT : CAM_DIR_NONE,
2076                       tag_action,
2077                       data_ptr,
2078                       dxfer_len,
2079                       sense_len,
2080                       sizeof(*scsi_cmd),
2081                       timeout);
2082 }
2083
2084 #endif /* _KERNEL */