sys/bus/cam/scsi/scsi_da.c

   1 /*
   2  * Implementation of SCSI Direct Access Peripheral driver for CAM.
   3  *
   4  * Copyright (c) 1997 Justin T. Gibbs.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions, and the following disclaimer,
  12  *    without modification, immediately at the beginning of the file.
  13  * 2. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/sys/cam/scsi/scsi_da.c,v 1.42.2.46 2003/10/21 22:18:19 thomas Exp $
  29  */
  30
  31 #include <sys/param.h>
  32
  33 #ifdef _KERNEL
  34
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h>
  37 #include <sys/buf.h>
  38 #include <sys/sysctl.h>
  39 #include <sys/taskqueue.h>
  40 #include <sys/lock.h>
  41 #include <sys/conf.h>
  42 #include <sys/devicestat.h>
  43 #include <sys/disk.h>
  44 #include <sys/dtype.h>
  45 #include <sys/eventhandler.h>
  46 #include <sys/malloc.h>
  47 #include <sys/cons.h>
  48 #include <sys/proc.h>
  49
  50 #include <sys/buf2.h>
  51
  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 <sys/camlib.h>
  64 #include "../cam.h"
  65 #include "../cam_ccb.h"
  66 #include "../cam_extend.h"
  67 #include "../cam_periph.h"
  68 #include "../cam_xpt_periph.h"
  69 #include "../cam_sim.h"
  70
  71 #include "scsi_daio.h"
  72 #include "scsi_message.h"
  73
  74 #ifndef _KERNEL
  75 #include "scsi_da.h"
  76 #endif /* !_KERNEL */
  77
  78 #ifdef _KERNEL
  79 typedef enum {
  80         DA_STATE_PROBE,
  81         DA_STATE_PROBE2,
  82         DA_STATE_NORMAL
  83 } da_state;
  84
  85 typedef enum {
  86         DA_FLAG_PACK_INVALID    = 0x001,
  87         DA_FLAG_NEW_PACK        = 0x002,
  88         DA_FLAG_PACK_LOCKED     = 0x004,
  89         DA_FLAG_PACK_REMOVABLE  = 0x008,
  90         DA_FLAG_TAGGED_QUEUING  = 0x010,
  91         DA_FLAG_RETRY_UA        = 0x080,
  92         DA_FLAG_OPEN            = 0x100,
  93         DA_FLAG_SCTX_INIT       = 0x200,
  94         DA_FLAG_RD_LIMIT        = 0x400,
  95         DA_FLAG_WR_LIMIT        = 0x800,
  96         DA_FLAG_CAN_TRIM        = 0x1000,
  97         DA_FLAG_CAP_MUTE        = 0x2000
  98 } da_flags;
  99
 100 typedef enum {
 101         DA_Q_NONE               = 0x00,
 102         DA_Q_NO_SYNC_CACHE      = 0x01,
 103         DA_Q_NO_6_BYTE          = 0x02,
 104         DA_Q_NO_PREVENT         = 0x04
 105 } da_quirks;
 106
 107 typedef enum {
 108         DA_CCB_POLLED           = 0x00,
 109         DA_CCB_PROBE            = 0x01,
 110         DA_CCB_PROBE2           = 0x02,
 111         DA_CCB_BUFFER_IO        = 0x03,
 112         DA_CCB_WAITING          = 0x04,
 113         DA_CCB_DUMP             = 0x05,
 114         DA_CCB_TRIM             = 0x06,
 115         DA_CCB_TYPE_MASK        = 0x0F,
 116         DA_CCB_RETRY_UA         = 0x10
 117 } da_ccb_state;
 118
 119 /* Offsets into our private area for storing information */
 120 #define ccb_state       ppriv_field0
 121 #define ccb_bio         ppriv_ptr1
 122
 123 struct disk_params {
 124         u_int8_t  heads;
 125         u_int32_t cylinders;
 126         u_int8_t  secs_per_track;
 127         u_int32_t secsize;      /* Number of bytes/sector */
 128         u_int64_t sectors;      /* total number sectors */
 129 };
 130
 131 #define TRIM_MAX_BLOCKS 8
 132 #define TRIM_MAX_RANGES TRIM_MAX_BLOCKS * 64
 133 struct trim_request {
 134         uint8_t         data[TRIM_MAX_RANGES * 8];
 135         struct bio      *bios[TRIM_MAX_RANGES];
 136 };
 137
 138 struct da_softc {
 139         struct   bio_queue_head bio_queue_rd;
 140         struct   bio_queue_head bio_queue_wr;
 141         struct   bio_queue_head bio_queue_trim;
 142         struct   devstat device_stats;
 143         SLIST_ENTRY(da_softc) links;
 144         LIST_HEAD(, ccb_hdr) pending_ccbs;
 145         da_state state;
 146         da_flags flags;
 147         da_quirks quirks;
 148         int      minimum_cmd_size;
 149         int      outstanding_cmds_rd;   /* outstanding read requests */
 150         int      outstanding_cmds_wr;   /* outstanding write requests */
 151         int      tps_ticks;
 152         long     tps_rd;                /* read bandwidth exponential/tick */
 153         long     tps_wr;                /* write bandwidth exponential/tick */
 154         int      trim_max_ranges;
 155         int      trim_running;
 156         int      trim_enabled;
 157         struct   disk_params params;
 158         struct   disk disk;
 159         union    ccb saved_ccb;
 160         struct task             sysctl_task;
 161         struct sysctl_ctx_list  sysctl_ctx;
 162         struct sysctl_oid       *sysctl_tree;
 163         struct trim_request     trim_req;
 164 };
 165
 166 struct da_quirk_entry {
 167         struct scsi_inquiry_pattern inq_pat;
 168         da_quirks quirks;
 169 };
 170
 171 static const char quantum[] = "QUANTUM";
 172 static const char microp[] = "MICROP";
 173
 174 static struct da_quirk_entry da_quirk_table[] =
 175 {
 176         /* SPI, FC devices */
 177         {
 178                 /*
 179                  * Fujitsu M2513A MO drives.
 180                  * Tested devices: M2513A2 firmware versions 1200 & 1300.
 181                  * (dip switch selects whether T_DIRECT or T_OPTICAL device)
 182                  * Reported by: W.Scholten <whs@xs4all.nl>
 183                  */
 184                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
 185                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 186         },
 187         {
 188                 /* See above. */
 189                 {T_OPTICAL, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
 190                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 191         },
 192         {
 193                 /*
 194                  * This particular Fujitsu drive doesn't like the
 195                  * synchronize cache command.
 196                  * Reported by: Tom Jackson <toj@gorilla.net>
 197                  */
 198                 {T_DIRECT, SIP_MEDIA_FIXED, "FUJITSU", "M2954*", "*"},
 199                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 200         },
 201         {
 202                 /*
 203                  * This drive doesn't like the synchronize cache command
 204                  * either.  Reported by: Matthew Jacob <mjacob@feral.com>
 205                  * in NetBSD PR kern/6027, August 24, 1998.
 206                  */
 207                 {T_DIRECT, SIP_MEDIA_FIXED, microp, "2217*", "*"},
 208                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 209         },
 210         {
 211                 /*
 212                  * This drive doesn't like the synchronize cache command
 213                  * either.  Reported by: Hellmuth Michaelis (hm@kts.org)
 214                  * (PR 8882).
 215                  */
 216                 {T_DIRECT, SIP_MEDIA_FIXED, microp, "2112*", "*"},
 217                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 218         },
 219         {
 220                 /*
 221                  * Doesn't like the synchronize cache command.
 222                  * Reported by: Blaz Zupan <blaz@gold.amis.net>
 223                  */
 224                 {T_DIRECT, SIP_MEDIA_FIXED, "NEC", "D3847*", "*"},
 225                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 226         },
 227         {
 228                 /*
 229                  * Doesn't like the synchronize cache command.
 230                  * Reported by: Blaz Zupan <blaz@gold.amis.net>
 231                  */
 232                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "MAVERICK 540S", "*"},
 233                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 234         },
 235         {
 236                 /*
 237                  * Doesn't like the synchronize cache command.
 238                  */
 239                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS525S", "*"},
 240                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 241         },
 242         {
 243                 /*
 244                  * Doesn't like the synchronize cache command.
 245                  * Reported by: walter@pelissero.de
 246                  */
 247                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS540S", "*"},
 248                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 249         },
 250         {
 251                 /*
 252                  * Doesn't work correctly with 6 byte reads/writes.
 253                  * Returns illegal request, and points to byte 9 of the
 254                  * 6-byte CDB.
 255                  * Reported by:  Adam McDougall <bsdx@spawnet.com>
 256                  */
 257                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 4*", "*"},
 258                 /*quirks*/ DA_Q_NO_6_BYTE
 259         },
 260         {
 261                 /* See above. */
 262                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 2*", "*"},
 263                 /*quirks*/ DA_Q_NO_6_BYTE
 264         },
 265         {
 266                 /*
 267                  * Doesn't like the synchronize cache command.
 268                  * Reported by: walter@pelissero.de
 269                  */
 270                 {T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CP3500*", "*"},
 271                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 272         },
 273         {
 274                 /*
 275                  * The CISS RAID controllers do not support SYNC_CACHE
 276                  */
 277                 {T_DIRECT, SIP_MEDIA_FIXED, "COMPAQ", "RAID*", "*"},
 278                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 279         },
 280         {
 281                 /*
 282                  * The same goes for the mly(4) controllers
 283                  */
 284                 {T_DIRECT, SIP_MEDIA_FIXED, "MLY*", "*", "MYLX"},
 285                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 286         },
 287         /*
 288          * USB mass storage devices supported by umass(4)
 289          *
 290          * NOTE: USB attachments automatically set DA_Q_NO_SYNC_CACHE so
 291          *       it does not have to be specified here.
 292          */
 293         {
 294                 /*
 295                  * Creative Nomad MUVO mp3 player (USB)
 296                  * PR: kern/53094
 297                  */
 298                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "NOMAD_MUVO", "*"},
 299                 /*quirks*/ DA_Q_NO_PREVENT
 300         },
 301         {
 302                 /*
 303                  * Sigmatel USB Flash MP3 Player
 304                  * PR: kern/57046
 305                  */
 306                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "SigmaTel", "MSCN", "*"},
 307                 /*quirks*/ DA_Q_NO_PREVENT
 308         },
 309         {
 310                 /*
 311                  * SEAGRAND NP-900 MP3 Player
 312                  * PR: kern/64563
 313                  */
 314                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "SEAGRAND", "NP-900*", "*"},
 315                 /*quirks*/ DA_Q_NO_PREVENT
 316         },
 317         {
 318                 /*
 319                  * Creative MUVO Slim mp3 player (USB)
 320                  * PR: usb/86131
 321                  */
 322                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "MuVo Slim",
 323                 "*"}, /*quirks*/ DA_Q_NO_PREVENT
 324         },
 325         {
 326                 /*
 327                  * Philips USB Key Audio KEY013
 328                  * PR: usb/68412
 329                  */
 330                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "PHILIPS", "Key*", "*"},
 331                 /*quirks*/ DA_Q_NO_PREVENT
 332         },
 333 };
 334
 335 static  d_open_t        daopen;
 336 static  d_close_t       daclose;
 337 static  d_strategy_t    dastrategy;
 338 static  d_dump_t        dadump;
 339 static  d_ioctl_t       daioctl;
 340 static  periph_init_t   dainit;
 341 static  void            daasync(void *callback_arg, u_int32_t code,
 342                                 struct cam_path *path, void *arg);
 343 static  int             dacmdsizesysctl(SYSCTL_HANDLER_ARGS);
 344 static  periph_ctor_t   daregister;
 345 static  periph_dtor_t   dacleanup;
 346 static  periph_start_t  dastart;
 347 static  periph_oninv_t  daoninvalidate;
 348 static  void            dadone(struct cam_periph *periph,
 349                                union ccb *done_ccb);
 350 static  int             daerror(union ccb *ccb, u_int32_t cam_flags,
 351                                 u_int32_t sense_flags);
 352 static void             daprevent(struct cam_periph *periph, int action);
 353 static int              dagetcapacity(struct cam_periph *periph, int ccbflags);
 354 static int              dacheckmedia(struct cam_periph *periph);
 355 static void             dasetgeom(struct cam_periph *periph, uint32_t block_len,
 356                                   uint64_t maxsector);
 357 static void             daflushbioq(struct bio_queue_head *bioq, int error);
 358 static void             dashutdown(void *arg, int howto);
 359
 360 #ifndef DA_DEFAULT_TIMEOUT
 361 #define DA_DEFAULT_TIMEOUT 60   /* Timeout in seconds */
 362 #endif
 363
 364 #ifndef DA_DEFAULT_RETRY
 365 #define DA_DEFAULT_RETRY        4
 366 #endif
 367
 368 __read_mostly int da_retry_count = DA_DEFAULT_RETRY;
 369 __read_mostly int da_default_timeout = DA_DEFAULT_TIMEOUT;
 370 __read_mostly static int da_balance_enable = 1;
 371 __read_mostly static int da_balance_ratio = 100;        /* read-to-write */
 372 __read_mostly static int da_balance_debug = 0;
 373
 374 SYSCTL_NODE(_kern_cam, OID_AUTO, da, CTLFLAG_RD, 0,
 375             "CAM Direct Access Disk driver");
 376 SYSCTL_INT(_kern_cam_da, OID_AUTO, retry_count, CTLFLAG_RW,
 377            &da_retry_count, 0, "Normal I/O retry count");
 378 TUNABLE_INT("kern.cam.da.retry_count", &da_retry_count);
 379 SYSCTL_INT(_kern_cam_da, OID_AUTO, default_timeout, CTLFLAG_RW,
 380            &da_default_timeout, 0, "Normal I/O timeout (in seconds)");
 381 TUNABLE_INT("kern.cam.da.default_timeout", &da_default_timeout);
 382
 383 SYSCTL_INT(_kern_cam_da, OID_AUTO, balance_enable, CTLFLAG_RW,
 384            &da_balance_enable, 0, "Enable tps balancing");
 385 SYSCTL_INT(_kern_cam_da, OID_AUTO, balance_ratio, CTLFLAG_RW,
 386            &da_balance_ratio, 0, "Set read-to-write ratio 100=1:1");
 387 SYSCTL_INT(_kern_cam_da, OID_AUTO, balance_debug, CTLFLAG_RW,
 388            &da_balance_debug, 0, "Enable tps balance debugging");
 389
 390 static struct periph_driver dadriver =
 391 {
 392         dainit, "da",
 393         TAILQ_HEAD_INITIALIZER(dadriver.units), /* generation */ 0
 394 };
 395
 396 PERIPHDRIVER_DECLARE(da, dadriver);
 397
 398 static struct dev_ops da_ops = {
 399         { "da", 0, D_DISK | D_MPSAFE },
 400         .d_open =       daopen,
 401         .d_close =      daclose,
 402         .d_read =       physread,
 403         .d_write =      physwrite,
 404         .d_strategy =   dastrategy,
 405         .d_dump =       dadump,
 406         .d_ioctl =      daioctl
 407 };
 408
 409 static struct extend_array *daperiphs;
 410
 411 MALLOC_DEFINE(M_SCSIDA, "scsi_da", "scsi_da buffers");
 412
 413 static int
 414 daioctl(struct dev_ioctl_args *ap)
 415 {
 416         int unit;
 417         int error = 0;
 418         struct buf *bp;
 419         struct cam_periph *periph;
 420         int byte_count;
 421
 422         off_t *del_num = (off_t*)ap->a_data;
 423         off_t bytes_left;
 424         off_t bytes_start;
 425
 426         cdev_t dev = ap->a_head.a_dev;
 427
 428
 429         unit = dkunit(dev);
 430         periph = cam_extend_get(daperiphs, unit);
 431         if (periph == NULL)
 432                 return(ENXIO);
 433
 434         switch (ap->a_cmd) {
 435         case DAIOCTRIM:
 436         {
 437
 438                 bytes_left = del_num[1];
 439                 bytes_start = del_num[0];
 440
 441                 /* TRIM occurs on 512-byte sectors. */
 442                 KKASSERT((bytes_left % 512) == 0);
 443                 KKASSERT((bytes_start% 512) == 0);
 444
 445
 446                 /* Break TRIM up into int-sized commands because of b_bcount */
 447                 while(bytes_left) {
 448
 449                         /*
 450                          * Rather than than squezing out more blocks in b_bcount
 451                          * and having to break up the TRIM request in da_start(),
 452                          * we ensure we can always TRIM this many bytes with one
 453                          * TRIM command (this happens if the device only
 454                          * supports one TRIM block).
 455                          *
 456                          * With min TRIM blksize of 1, TRIM command free
 457                          * 4194240 blks(64*65535): each LBA range can address
 458                          * 65535 blks and there 64 such ranges in a 512-byte
 459                          * block. And, 4194240 * 512 = 0x7FFF8000
 460                          *
 461                          */
 462                         byte_count = MIN(bytes_left,0x7FFF8000);
 463                         bp = getnewbuf(0, 0, 0, 1);
 464
 465                         bp->b_cmd = BUF_CMD_FREEBLKS;
 466                         bp->b_bio1.bio_offset = bytes_start;
 467                         bp->b_bcount = byte_count;
 468                         bp->b_bio1.bio_flags |= BIO_SYNC;
 469                         bp->b_bio1.bio_done = biodone_sync;
 470
 471                         dev_dstrategy(ap->a_head.a_dev, &bp->b_bio1);
 472
 473                         if (biowait(&bp->b_bio1, "TRIM")) {
 474                                 kprintf("Error:%d\n", bp->b_error);
 475                                 brelse(bp);
 476                                 return(bp->b_error ? bp->b_error : EIO);
 477                         }
 478                         brelse(bp);
 479                         bytes_left -= byte_count;
 480                         bytes_start += byte_count;
 481                 }
 482                 break;
 483         }
 484         default:
 485                 return(EINVAL);
 486         }
 487
 488         return(error);
 489 }
 490
 491 static int
 492 daopen(struct dev_open_args *ap)
 493 {
 494         cdev_t dev = ap->a_head.a_dev;
 495         struct cam_periph *periph;
 496         struct da_softc *softc;
 497         struct disk_info info;
 498         int unit;
 499         int error;
 500
 501         unit = dkunit(dev);
 502         periph = cam_extend_get(daperiphs, unit);
 503         if (periph == NULL) {
 504                 return (ENXIO);
 505         }
 506
 507         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
 508                 return(ENXIO);
 509         }
 510
 511         cam_periph_lock(periph);
 512         if ((error = cam_periph_hold(periph, PCATCH)) != 0) {
 513                 cam_periph_unlock(periph);
 514                 cam_periph_release(periph);
 515                 return (error);
 516         }
 517
 518         unit = periph->unit_number;
 519         softc = (struct da_softc *)periph->softc;
 520
 521         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 522             ("daopen: dev=%s (unit %d)\n", devtoname(dev),
 523              unit));
 524
 525         if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
 526                 /* Invalidate our pack information. */
 527                 disk_invalidate(&softc->disk);
 528                 softc->flags &= ~DA_FLAG_PACK_INVALID;
 529         }
 530
 531         error = dacheckmedia(periph);
 532         softc->flags |= DA_FLAG_OPEN;
 533
 534         if (error == 0) {
 535                 struct ccb_getdev *cgd;
 536
 537                 /* Build disk information structure */
 538                 bzero(&info, sizeof(info));
 539                 info.d_type = DTYPE_SCSI;
 540
 541                 /*
 542                  * Grab the inquiry data to get the vendor and product names.
 543                  * Put them in the typename and packname for the label.
 544                  */
 545                 cgd = &xpt_alloc_ccb()->cgd;
 546                 xpt_setup_ccb(&cgd->ccb_h, periph->path, /*priority*/ 1);
 547                 cgd->ccb_h.func_code = XPT_GDEV_TYPE;
 548                 xpt_action((union ccb *)cgd);
 549                 xpt_free_ccb(&cgd->ccb_h);
 550
 551                 /*
 552                  * Check to see whether or not the blocksize is set yet.
 553                  * If it isn't, set it and then clear the blocksize
 554                  * unavailable flag for the device statistics.
 555                  */
 556                 if ((softc->device_stats.flags & DEVSTAT_BS_UNAVAILABLE) != 0){
 557                         softc->device_stats.block_size = softc->params.secsize;
 558                         softc->device_stats.flags &= ~DEVSTAT_BS_UNAVAILABLE;
 559                 }
 560         }
 561
 562         if (error == 0) {
 563                 softc->flags &= ~DA_FLAG_CAP_MUTE;
 564                 if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0 &&
 565                     (softc->quirks & DA_Q_NO_PREVENT) == 0)
 566                         daprevent(periph, PR_PREVENT);
 567         } else {
 568                 softc->flags |= DA_FLAG_CAP_MUTE;
 569                 softc->flags &= ~DA_FLAG_OPEN;
 570                 cam_periph_release(periph);
 571         }
 572         cam_periph_unhold(periph, 1);
 573         return (error);
 574 }
 575
 576 static int
 577 daclose(struct dev_close_args *ap)
 578 {
 579         cdev_t dev = ap->a_head.a_dev;
 580         struct  cam_periph *periph;
 581         struct  da_softc *softc;
 582         int     unit;
 583         int     error;
 584
 585         unit = dkunit(dev);
 586         periph = cam_extend_get(daperiphs, unit);
 587         if (periph == NULL)
 588                 return (ENXIO);
 589
 590         cam_periph_lock(periph);
 591         if ((error = cam_periph_hold(periph, 0)) != 0) {
 592                 cam_periph_unlock(periph);
 593                 cam_periph_release(periph);
 594                 return (error);
 595         }
 596
 597         softc = (struct da_softc *)periph->softc;
 598
 599         if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
 600                 union   ccb *ccb;
 601
 602                 ccb = cam_periph_getccb(periph, /*priority*/1);
 603                 ccb->ccb_h.ccb_state = DA_CCB_POLLED;
 604
 605                 scsi_synchronize_cache(&ccb->csio,
 606                                        /*retries*/1,
 607                                        /*cbfcnp*/dadone,
 608                                        MSG_SIMPLE_Q_TAG,
 609                                        /*begin_lba*/0,/* Cover the whole disk */
 610                                        /*lb_count*/0,
 611                                        SSD_FULL_SIZE,
 612                                        5 * 60 * 1000);
 613
 614                 cam_periph_runccb(ccb, /*error_routine*/NULL, /*cam_flags*/0,
 615                                   /*sense_flags*/SF_RETRY_UA,
 616                                   &softc->device_stats);
 617
 618                 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 619                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) ==
 620                              CAM_SCSI_STATUS_ERROR) {
 621                                 int asc, ascq;
 622                                 int sense_key, error_code;
 623
 624                                 scsi_extract_sense(&ccb->csio.sense_data,
 625                                                    &error_code,
 626                                                    &sense_key,
 627                                                    &asc, &ascq);
 628                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
 629                                         scsi_sense_print(&ccb->csio);
 630                         } else {
 631                                 xpt_print(periph->path, "Synchronize cache "
 632                                     "failed, status == 0x%x, scsi status == "
 633                                     "0x%x\n", ccb->csio.ccb_h.status,
 634                                     ccb->csio.scsi_status);
 635                         }
 636                 }
 637
 638                 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 639                         cam_release_devq(ccb->ccb_h.path,
 640                                          /*relsim_flags*/0,
 641                                          /*reduction*/0,
 642                                          /*timeout*/0,
 643                                          /*getcount_only*/0);
 644
 645                 xpt_release_ccb(ccb);
 646
 647         }
 648
 649         if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0) {
 650                 if ((softc->quirks & DA_Q_NO_PREVENT) == 0)
 651                         daprevent(periph, PR_ALLOW);
 652                 /*
 653                  * If we've got removeable media, mark the blocksize as
 654                  * unavailable, since it could change when new media is
 655                  * inserted.
 656                  */
 657                 softc->device_stats.flags |= DEVSTAT_BS_UNAVAILABLE;
 658         }
 659
 660         /*
 661          * Don't compound any ref counting software bugs with more.
 662          */
 663         if (softc->flags & DA_FLAG_OPEN) {
 664                 softc->flags &= ~DA_FLAG_OPEN;
 665                 cam_periph_release(periph);
 666         } else {
 667                 xpt_print(periph->path,
 668                           "daclose() called on an already closed device!\n");
 669         }
 670         cam_periph_unhold(periph, 1);
 671         return (0);
 672 }
 673
 674 /*
 675  * Actually translate the requested transfer into one the physical driver
 676  * can understand.  The transfer is described by a buf and will include
 677  * only one physical transfer.
 678  */
 679 static int
 680 dastrategy(struct dev_strategy_args *ap)
 681 {
 682         cdev_t dev = ap->a_head.a_dev;
 683         struct bio *bio = ap->a_bio;
 684         struct buf *bp = bio->bio_buf;
 685         struct cam_periph *periph;
 686         struct da_softc *softc;
 687         u_int  unit;
 688
 689         unit = dkunit(dev);
 690         periph = cam_extend_get(daperiphs, unit);
 691         if (periph == NULL) {
 692                 bp->b_error = ENXIO;
 693                 goto bad;
 694         }
 695         softc = (struct da_softc *)periph->softc;
 696
 697         cam_periph_lock(periph);
 698
 699 #if 0
 700         /*
 701          * check it's not too big a transfer for our adapter
 702          */
 703         scsi_minphys(bp, &sd_switch);
 704 #endif
 705
 706         /*
 707          * Mask interrupts so that the pack cannot be invalidated until
 708          * after we are in the queue.  Otherwise, we might not properly
 709          * clean up one of the buffers.
 710          */
 711
 712         /*
 713          * If the device has been made invalid, error out
 714          */
 715         if ((softc->flags & DA_FLAG_PACK_INVALID)) {
 716                 cam_periph_unlock(periph);
 717                 bp->b_error = ENXIO;
 718                 goto bad;
 719         }
 720
 721         /*
 722          * Place it in the queue of disk activities for this disk
 723          */
 724         if (bp->b_cmd == BUF_CMD_WRITE || bp->b_cmd == BUF_CMD_FLUSH)
 725                 bioqdisksort(&softc->bio_queue_wr, bio);
 726         else if (bp->b_cmd == BUF_CMD_FREEBLKS)
 727                 bioqdisksort(&softc->bio_queue_trim, bio);
 728         else
 729                 bioqdisksort(&softc->bio_queue_rd, bio);
 730
 731         /*
 732          * Schedule ourselves for performing the work.
 733          */
 734         xpt_schedule(periph, /* XXX priority */1);
 735         cam_periph_unlock(periph);
 736
 737         return(0);
 738 bad:
 739         bp->b_flags |= B_ERROR;
 740
 741         /*
 742          * Correctly set the buf to indicate a completed xfer
 743          */
 744         bp->b_resid = bp->b_bcount;
 745         biodone(bio);
 746         return(0);
 747 }
 748
 749 static int
 750 dadump(struct dev_dump_args *ap)
 751 {
 752         cdev_t dev = ap->a_head.a_dev;
 753         struct      cam_periph *periph;
 754         struct      da_softc *softc;
 755         u_int       unit;
 756         u_int32_t   secsize;
 757         struct      ccb_scsiio *csio;
 758
 759         unit = dkunit(dev);
 760         periph = cam_extend_get(daperiphs, unit);
 761         if (periph == NULL)
 762                 return (ENXIO);
 763
 764         softc = (struct da_softc *)periph->softc;
 765         cam_periph_lock(periph);
 766         secsize = softc->params.secsize; /* XXX: or ap->a_secsize? */
 767
 768         if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
 769                 cam_periph_unlock(periph);
 770                 return (ENXIO);
 771         }
 772
 773         csio = &xpt_alloc_ccb()->csio;
 774
 775         /*
 776          * because length == 0 means we are supposed to flush cache, we only
 777          * try to write something if length > 0.
 778          */
 779         if (ap->a_length > 0) {
 780                 xpt_setup_ccb(&csio->ccb_h, periph->path, /*priority*/1);
 781                 csio->ccb_h.flags |= CAM_POLLED;
 782                 csio->ccb_h.ccb_state = DA_CCB_DUMP;
 783                 scsi_read_write(csio,
 784                                 /*retries*/1,
 785                                 dadone,
 786                                 MSG_ORDERED_Q_TAG,
 787                                 /*read*/FALSE,
 788                                 /*byte2*/0,
 789                                 /*minimum_cmd_size*/ softc->minimum_cmd_size,
 790                                 ap->a_offset / secsize,
 791                                 ap->a_length / secsize,
 792                                 /*data_ptr*/(u_int8_t *) ap->a_virtual,
 793                                 /*dxfer_len*/ap->a_length,
 794                                 /*sense_len*/SSD_FULL_SIZE,
 795                                 DA_DEFAULT_TIMEOUT * 1000);
 796                 xpt_polled_action((union ccb *)csio);
 797
 798                 if ((csio->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 799                         kprintf("Aborting dump due to I/O error.\n");
 800                         if ((csio->ccb_h.status & CAM_STATUS_MASK) ==
 801                              CAM_SCSI_STATUS_ERROR)
 802                                 scsi_sense_print(csio);
 803                         else
 804                                 kprintf("status == 0x%x, scsi status == 0x%x\n",
 805                                        csio->ccb_h.status, csio->scsi_status);
 806                         cam_periph_unlock(periph);
 807                         xpt_free_ccb(&csio->ccb_h);
 808                         return(EIO);
 809                 }
 810                 goto done;
 811         }
 812
 813         /*
 814          * Sync the disk cache contents to the physical media.
 815          */
 816         if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
 817
 818                 xpt_setup_ccb(&csio->ccb_h, periph->path, /*priority*/1);
 819                 csio->ccb_h.ccb_state = DA_CCB_DUMP;
 820                 scsi_synchronize_cache(csio,
 821                                        /*retries*/1,
 822                                        /*cbfcnp*/dadone,
 823                                        MSG_SIMPLE_Q_TAG,
 824                                        /*begin_lba*/0,/* Cover the whole disk */
 825                                        /*lb_count*/0,
 826                                        SSD_FULL_SIZE,
 827                                        5 * 60 * 1000);
 828                 xpt_polled_action((union ccb *)csio);
 829
 830                 if ((csio->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 831                         if ((csio->ccb_h.status & CAM_STATUS_MASK) ==
 832                              CAM_SCSI_STATUS_ERROR) {
 833                                 int asc, ascq;
 834                                 int sense_key, error_code;
 835
 836                                 scsi_extract_sense(&csio->sense_data,
 837                                                    &error_code,
 838                                                    &sense_key,
 839                                                    &asc, &ascq);
 840                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
 841                                         scsi_sense_print(csio);
 842                         } else {
 843                                 xpt_print(periph->path, "Synchronize cache "
 844                                     "failed, status == 0x%x, scsi status == "
 845                                     "0x%x\n",
 846                                     csio->ccb_h.status, csio->scsi_status);
 847                         }
 848                 }
 849         }
 850 done:
 851         cam_periph_unlock(periph);
 852         xpt_free_ccb(&csio->ccb_h);
 853
 854         return (0);
 855 }
 856
 857 static void
 858 dainit(void)
 859 {
 860         cam_status status;
 861
 862         /*
 863          * Create our extend array for storing the devices we attach to.
 864          */
 865         daperiphs = cam_extend_new();
 866         if (daperiphs == NULL) {
 867                 kprintf("da: Failed to alloc extend array!\n");
 868                 return;
 869         }
 870
 871         /*
 872          * Install a global async callback.  This callback will
 873          * receive async callbacks like "new device found".
 874          */
 875         status = xpt_register_async(AC_FOUND_DEVICE, daasync, NULL, NULL);
 876
 877         if (status != CAM_REQ_CMP) {
 878                 kprintf("da: Failed to attach master async callback "
 879                        "due to status 0x%x!\n", status);
 880         } else {
 881                 /* Register our shutdown event handler */
 882                 if ((EVENTHANDLER_REGISTER(shutdown_post_sync, dashutdown,
 883                                            NULL, SHUTDOWN_PRI_SECOND)) == NULL)
 884                         kprintf("%s: shutdown event registration failed!\n",
 885                             __func__);
 886         }
 887 }
 888
 889 static void
 890 daoninvalidate(struct cam_periph *periph)
 891 {
 892         struct da_softc *softc;
 893
 894         softc = (struct da_softc *)periph->softc;
 895
 896         /*
 897          * De-register any async callbacks.
 898          */
 899         xpt_register_async(0, daasync, periph, periph->path);
 900
 901         softc->flags |= DA_FLAG_PACK_INVALID;
 902
 903         /*
 904          * Return all queued I/O with ENXIO.
 905          * XXX Handle any transactions queued to the card
 906          *     with XPT_ABORT_CCB.
 907          */
 908         daflushbioq(&softc->bio_queue_trim, ENXIO);
 909         daflushbioq(&softc->bio_queue_wr, ENXIO);
 910         daflushbioq(&softc->bio_queue_rd, ENXIO);
 911         xpt_print(periph->path, "lost device\n");
 912 }
 913
 914 static void
 915 daflushbioq(struct bio_queue_head *bioq, int error)
 916 {
 917         struct bio *q_bio;
 918         struct buf *q_bp;
 919
 920         while ((q_bio = bioq_first(bioq)) != NULL){
 921                 bioq_remove(bioq, q_bio);
 922                 q_bp = q_bio->bio_buf;
 923                 q_bp->b_resid = q_bp->b_bcount;
 924                 q_bp->b_error = error;
 925                 q_bp->b_flags |= B_ERROR;
 926                 biodone(q_bio);
 927         }
 928 }
 929
 930 static void
 931 dacleanup(struct cam_periph *periph)
 932 {
 933         struct da_softc *softc;
 934
 935         softc = (struct da_softc *)periph->softc;
 936
 937         devstat_remove_entry(&softc->device_stats);
 938         cam_extend_release(daperiphs, periph->unit_number);
 939         xpt_print(periph->path, "removing device entry\n");
 940         /*
 941          * If we can't free the sysctl tree, oh well...
 942          */
 943         if ((softc->flags & DA_FLAG_SCTX_INIT) != 0
 944             && sysctl_ctx_free(&softc->sysctl_ctx) != 0) {
 945                 xpt_print(periph->path, "can't remove sysctl context\n");
 946         }
 947         periph->softc = NULL;
 948         if (softc->disk.d_rawdev) {
 949                 cam_periph_unlock(periph);
 950                 disk_destroy(&softc->disk);
 951                 cam_periph_lock(periph);
 952         }
 953
 954         kfree(softc, M_DEVBUF);
 955 }
 956
 957 static void
 958 daasync(void *callback_arg, u_int32_t code,
 959         struct cam_path *path, void *arg)
 960 {
 961         struct cam_periph *periph;
 962
 963         periph = (struct cam_periph *)callback_arg;
 964
 965         switch (code) {
 966         case AC_FOUND_DEVICE:
 967         {
 968                 struct ccb_getdev *cgd;
 969                 cam_status status;
 970
 971                 cgd = (struct ccb_getdev *)arg;
 972                 if (cgd == NULL)
 973                         break;
 974
 975                 if (SID_TYPE(&cgd->inq_data) != T_DIRECT
 976                     && SID_TYPE(&cgd->inq_data) != T_RBC
 977                     && SID_TYPE(&cgd->inq_data) != T_OPTICAL)
 978                         break;
 979
 980                 /*
 981                  * Don't complain if a valid peripheral is already attached.
 982                  */
 983                 periph = cam_periph_find(cgd->ccb_h.path, "da");
 984                 if (periph && (periph->flags & CAM_PERIPH_INVALID) == 0)
 985                         break;
 986
 987                 /*
 988                  * Allocate a peripheral instance for
 989                  * this device and start the probe
 990                  * process.
 991                  */
 992                 status = cam_periph_alloc(daregister, daoninvalidate,
 993                                           dacleanup, dastart,
 994                                           "da", CAM_PERIPH_BIO,
 995                                           cgd->ccb_h.path, daasync,
 996                                           AC_FOUND_DEVICE, cgd);
 997
 998                 if (status != CAM_REQ_CMP && status != CAM_REQ_INPROG) {
 999                         kprintf("%s: Unable to attach to new device "
1000                             "due to status 0x%x\n", __func__, status);
1001                 }
1002                 break;
1003         }
1004         case AC_SENT_BDR:
1005         case AC_BUS_RESET:
1006         {
1007                 struct da_softc *softc;
1008                 struct ccb_hdr *ccbh;
1009
1010                 softc = (struct da_softc *)periph->softc;
1011                 /*
1012                  * Don't fail on the expected unit attention
1013                  * that will occur.
1014                  */
1015                 softc->flags |= DA_FLAG_RETRY_UA;
1016                 LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le)
1017                         ccbh->ccb_state |= DA_CCB_RETRY_UA;
1018                 /* FALLTHROUGH*/
1019         }
1020         default:
1021                 cam_periph_async(periph, code, path, arg);
1022                 break;
1023         }
1024 }
1025
1026 static void
1027 dasysctlinit(void *context, int pending)
1028 {
1029         struct cam_periph *periph;
1030         struct da_softc *softc;
1031         char tmpstr[80], tmpstr2[80];
1032
1033         periph = (struct cam_periph *)context;
1034         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
1035                 return;
1036         }
1037
1038         softc = (struct da_softc *)periph->softc;
1039         ksnprintf(tmpstr, sizeof(tmpstr),
1040                   "CAM DA unit %d", periph->unit_number);
1041         ksnprintf(tmpstr2, sizeof(tmpstr2),
1042                   "%d", periph->unit_number);
1043
1044         sysctl_ctx_free(&softc->sysctl_ctx);
1045         sysctl_ctx_init(&softc->sysctl_ctx);
1046         softc->flags |= DA_FLAG_SCTX_INIT;
1047         softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
1048                 SYSCTL_STATIC_CHILDREN(_kern_cam_da), OID_AUTO, tmpstr2,
1049                 CTLFLAG_RD, 0, tmpstr);
1050         if (softc->sysctl_tree == NULL) {
1051                 kprintf("%s: unable to allocate sysctl tree\n", __func__);
1052                 cam_periph_release(periph);
1053                 return;
1054         }
1055
1056         /*
1057          * Now register the sysctl handler, so the user can the value on
1058          * the fly.
1059          */
1060         SYSCTL_ADD_PROC(&softc->sysctl_ctx,SYSCTL_CHILDREN(softc->sysctl_tree),
1061                 OID_AUTO, "minimum_cmd_size", CTLTYPE_INT | CTLFLAG_RW,
1062                 &softc->minimum_cmd_size, 0, dacmdsizesysctl, "I",
1063                 "Minimum CDB size");
1064
1065         /* Only create the option if the device supports TRIM */
1066         if (softc->disk.d_info.d_trimflag) {
1067                 SYSCTL_ADD_INT(&softc->sysctl_ctx,
1068                     SYSCTL_CHILDREN(softc->sysctl_tree),
1069                     OID_AUTO,
1070                     "trim_enabled",
1071                     CTLFLAG_RW,
1072                     &softc->trim_enabled,
1073                     0,
1074                     "Enable TRIM for this device (SSD))");
1075         }
1076
1077         cam_periph_release(periph);
1078 }
1079
1080 static int
1081 dacmdsizesysctl(SYSCTL_HANDLER_ARGS)
1082 {
1083         int error, value;
1084
1085         value = *(int *)arg1;
1086
1087         error = sysctl_handle_int(oidp, &value, 0, req);
1088
1089         if ((error != 0)
1090          || (req->newptr == NULL))
1091                 return (error);
1092
1093         /*
1094          * Acceptable values here are 6, 10 or 12, or 16.
1095          */
1096         if (value < 6)
1097                 value = 6;
1098         else if ((value > 6)
1099               && (value <= 10))
1100                 value = 10;
1101         else if ((value > 10)
1102               && (value <= 12))
1103                 value = 12;
1104         else if (value > 12)
1105                 value = 16;
1106
1107         *(int *)arg1 = value;
1108
1109         return (0);
1110 }
1111
1112 static cam_status
1113 daregister(struct cam_periph *periph, void *arg)
1114 {
1115         struct da_softc *softc;
1116         struct ccb_pathinq *cpi;
1117         struct ccb_getdev *cgd;
1118         char tmpstr[80];
1119         caddr_t match;
1120
1121         cgd = (struct ccb_getdev *)arg;
1122         if (periph == NULL) {
1123                 kprintf("%s: periph was NULL!!\n", __func__);
1124                 return(CAM_REQ_CMP_ERR);
1125         }
1126
1127         if (cgd == NULL) {
1128                 kprintf("%s: no getdev CCB, can't register device\n",
1129                     __func__);
1130                 return(CAM_REQ_CMP_ERR);
1131         }
1132
1133         softc = kmalloc(sizeof(*softc), M_DEVBUF, M_INTWAIT | M_ZERO);
1134         sysctl_ctx_init(&softc->sysctl_ctx);
1135         LIST_INIT(&softc->pending_ccbs);
1136         softc->state = DA_STATE_PROBE;
1137         bioq_init(&softc->bio_queue_trim);
1138         bioq_init(&softc->bio_queue_rd);
1139         bioq_init(&softc->bio_queue_wr);
1140         if (SID_IS_REMOVABLE(&cgd->inq_data))
1141                 softc->flags |= DA_FLAG_PACK_REMOVABLE;
1142         if ((cgd->inq_data.flags & SID_CmdQue) != 0)
1143                 softc->flags |= DA_FLAG_TAGGED_QUEUING;
1144
1145         /* Used to get TRIM status from AHCI driver */
1146         if (cgd->inq_data.vendor_specific1[0] == 1) {
1147                 /*
1148                  * max number of lba ranges an SSD can handle in a single
1149                  * TRIM command. vendor_specific1[1] is the num of 512-byte
1150                  * blocks the SSD reports that can be passed in a TRIM cmd.
1151                  */
1152                 softc->trim_max_ranges =
1153                    min(cgd->inq_data.vendor_specific1[1] * 64, TRIM_MAX_RANGES);
1154         }
1155
1156         periph->softc = softc;
1157
1158         cam_extend_set(daperiphs, periph->unit_number, periph);
1159
1160         /*
1161          * See if this device has any quirks.
1162          */
1163         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1164                                (caddr_t)da_quirk_table,
1165                                NELEM(da_quirk_table),
1166                                sizeof(*da_quirk_table), scsi_inquiry_match);
1167
1168         if (match != NULL)
1169                 softc->quirks = ((struct da_quirk_entry *)match)->quirks;
1170         else
1171                 softc->quirks = DA_Q_NONE;
1172
1173         /*
1174          * Unconditionally disable the synchronize cache command for
1175          * usb attachments.  It's just impossible to determine if the
1176          * device supports it or not and if it doesn't the port can
1177          * brick.
1178          */
1179         if (strncmp(periph->sim->sim_name, "umass", 4) == 0) {
1180                 softc->quirks |= DA_Q_NO_SYNC_CACHE;
1181         }
1182
1183         TASK_INIT(&softc->sysctl_task, 0, dasysctlinit, periph);
1184
1185         /* Check if the SIM does not want 6 byte commands */
1186         cpi = &xpt_alloc_ccb()->cpi;
1187         xpt_setup_ccb(&cpi->ccb_h, periph->path, /*priority*/1);
1188         cpi->ccb_h.func_code = XPT_PATH_INQ;
1189         xpt_action((union ccb *)cpi);
1190         if (cpi->ccb_h.status == CAM_REQ_CMP && (cpi->hba_misc & PIM_NO_6_BYTE))
1191                 softc->quirks |= DA_Q_NO_6_BYTE;
1192
1193         /*
1194          * RBC devices don't have to support READ(6), only READ(10).
1195          */
1196         if (softc->quirks & DA_Q_NO_6_BYTE || SID_TYPE(&cgd->inq_data) == T_RBC)
1197                 softc->minimum_cmd_size = 10;
1198         else
1199                 softc->minimum_cmd_size = 6;
1200
1201         /*
1202          * Load the user's default, if any.
1203          */
1204         ksnprintf(tmpstr, sizeof(tmpstr), "kern.cam.da.%d.minimum_cmd_size",
1205                  periph->unit_number);
1206         TUNABLE_INT_FETCH(tmpstr, &softc->minimum_cmd_size);
1207
1208         /*
1209          * 6, 10, 12, and 16 are the currently permissible values.
1210          */
1211         if (softc->minimum_cmd_size < 6)
1212                 softc->minimum_cmd_size = 6;
1213         else if ((softc->minimum_cmd_size > 6)
1214               && (softc->minimum_cmd_size <= 10))
1215                 softc->minimum_cmd_size = 10;
1216         else if ((softc->minimum_cmd_size > 10)
1217               && (softc->minimum_cmd_size <= 12))
1218                 softc->minimum_cmd_size = 12;
1219         else if (softc->minimum_cmd_size > 12)
1220                 softc->minimum_cmd_size = 16;
1221
1222         /*
1223          * The DA driver supports a blocksize, but
1224          * we don't know the blocksize until we do
1225          * a read capacity.  So, set a flag to
1226          * indicate that the blocksize is
1227          * unavailable right now.  We'll clear the
1228          * flag as soon as we've done a read capacity.
1229          */
1230         devstat_add_entry(&softc->device_stats, "da",
1231                           periph->unit_number, 0,
1232                           DEVSTAT_BS_UNAVAILABLE,
1233                           SID_TYPE(&cgd->inq_data) | DEVSTAT_TYPE_IF_SCSI,
1234                           DEVSTAT_PRIORITY_DISK);
1235
1236         /*
1237          * Register this media as a disk
1238          */
1239         CAM_SIM_UNLOCK(periph->sim);
1240         disk_create(periph->unit_number, &softc->disk, &da_ops);
1241         if (cpi->maxio == 0 || cpi->maxio > MAXPHYS)
1242                 softc->disk.d_rawdev->si_iosize_max = MAXPHYS;
1243         else
1244                 softc->disk.d_rawdev->si_iosize_max = cpi->maxio;
1245         if (bootverbose) {
1246                 kprintf("%s%d: si_iosize_max:%d\n",
1247                     periph->periph_name,
1248                     periph->unit_number,
1249                     softc->disk.d_rawdev->si_iosize_max);
1250         }
1251         CAM_SIM_LOCK(periph->sim);
1252
1253         /*
1254          * Add async callbacks for bus reset and
1255          * bus device reset calls.  I don't bother
1256          * checking if this fails as, in most cases,
1257          * the system will function just fine without
1258          * them and the only alternative would be to
1259          * not attach the device on failure.
1260          */
1261         xpt_register_async(AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE,
1262                            daasync, periph, periph->path);
1263
1264         /*
1265          * Take an exclusive refcount on the periph while dastart is called
1266          * to finish the probe.  The reference will be dropped in dadone at
1267          * the end of probe.
1268          */
1269         xpt_free_ccb(&cpi->ccb_h);
1270         cam_periph_hold(periph, 0);
1271         xpt_schedule(periph, /*priority*/5);
1272
1273         return(CAM_REQ_CMP);
1274 }
1275
1276 static void
1277 dastart(struct cam_periph *periph, union ccb *start_ccb)
1278 {
1279         struct da_softc *softc;
1280
1281         softc = (struct da_softc *)periph->softc;
1282
1283         switch (softc->state) {
1284         case DA_STATE_NORMAL:
1285         {
1286                 /* Pull a buffer from the queue and get going on it */
1287                 struct bio *bio;
1288                 struct bio *bio_rd;
1289                 struct bio *bio_wr;
1290                 struct buf *bp;
1291                 u_int8_t tag_code;
1292                 int rd_limit;
1293                 int wr_limit;
1294
1295                 /*
1296                  * See if there is a buf with work for us to do..
1297                  */
1298                 bio_rd = bioq_first(&softc->bio_queue_rd);
1299                 bio_wr = bioq_first(&softc->bio_queue_wr);
1300
1301                 if (periph->immediate_priority <= periph->pinfo.priority) {
1302                         CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1303                                         ("queuing for immediate ccb\n"));
1304                         start_ccb->ccb_h.ccb_state = DA_CCB_WAITING;
1305                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1306                                           periph_links.sle);
1307                         periph->immediate_priority = CAM_PRIORITY_NONE;
1308                         wakeup(&periph->ccb_list);
1309                         if (bio_rd || bio_wr) {
1310                                 /*
1311                                  * Have more work to do, so ensure we stay
1312                                  * scheduled
1313                                  */
1314                                 xpt_schedule(periph, /* XXX priority */1);
1315                         }
1316                         break;
1317                 }
1318
1319                 /* Run the trim command if not already running */
1320                 if (!softc->trim_running &&
1321                    (bio = bioq_first(&softc->bio_queue_trim)) != NULL) {
1322                         struct trim_request *req = &softc->trim_req;
1323                         struct bio *bio1;
1324                         int bps = 0, ranges = 0;
1325
1326                         softc->trim_running = 1;
1327                         bzero(req, sizeof(*req));
1328                         bio1 = bio;
1329                         while (1) {
1330                                 uint64_t lba;
1331                                 int count;
1332
1333                                 bp = bio1->bio_buf;
1334                                 count = bp->b_bcount / softc->params.secsize;
1335                                 lba = bio1->bio_offset/softc->params.secsize;
1336
1337                                 bioq_remove(&softc->bio_queue_trim, bio1);
1338                                 while (count > 0) {
1339                                         int c = min(count, 0xffff);
1340                                         int off = ranges * 8;
1341
1342                                         req->data[off + 0] = lba & 0xff;
1343                                         req->data[off + 1] = (lba >> 8) & 0xff;
1344                                         req->data[off + 2] = (lba >> 16) & 0xff;
1345                                         req->data[off + 3] = (lba >> 24) & 0xff;
1346                                         req->data[off + 4] = (lba >> 32) & 0xff;
1347                                         req->data[off + 5] = (lba >> 40) & 0xff;
1348                                         req->data[off + 6] = c & 0xff;
1349                                         req->data[off + 7] = (c >> 8) & 0xff;
1350                                         lba += c;
1351                                         count -= c;
1352                                         ranges++;
1353                                 }
1354
1355                                 /* Try to merge multiple TRIM requests */
1356                                 req->bios[bps++] = bio1;
1357                                 bio1 = bioq_first(&softc->bio_queue_trim);
1358                                 if (bio1 == NULL ||
1359                                     bio1->bio_buf->b_bcount / softc->params.secsize >
1360                                     (softc->trim_max_ranges - ranges) * 0xffff)
1361                                         break;
1362                         }
1363
1364
1365                         cam_fill_csio(&start_ccb->csio,
1366                             1/*retries*/,
1367                             dadone,
1368                             CAM_DIR_OUT,
1369                             MSG_SIMPLE_Q_TAG,
1370                             req->data,
1371                             ((ranges +63)/64)*512,
1372                             SSD_FULL_SIZE,
1373                             sizeof(struct scsi_rw_6),
1374                             da_default_timeout*2);
1375
1376                         start_ccb->ccb_h.ccb_state = DA_CCB_TRIM;
1377                         LIST_INSERT_HEAD(&softc->pending_ccbs,
1378                             &start_ccb->ccb_h, periph_links.le);
1379                         start_ccb->csio.ccb_h.func_code = XPT_TRIM;
1380                         start_ccb->ccb_h.ccb_bio = bio;
1381                         devstat_start_transaction(&softc->device_stats);
1382                         xpt_action(start_ccb);
1383                         xpt_schedule(periph, 1);
1384                         break;
1385                 }
1386
1387                 /*
1388                  * Select a read or write buffer to queue.  Limit the number
1389                  * of tags dedicated to reading or writing, giving reads
1390                  * precedence.
1391                  *
1392                  * Writes to modern hard drives go into the HDs cache and
1393                  * return completion nearly instantly.  That is until the
1394                  * cache becomes full.  When the HDs cache becomes full
1395                  * write commands will begin to stall.  If all available
1396                  * tags are taken up by writes which saturate the drive
1397                  * reads will become tag-starved.
1398                  *
1399                  * A similar situation can occur with reads.  With many
1400                  * parallel readers all tags can be taken up by reads
1401                  * and prevent any writes from draining, even if the HD's
1402                  * cache is not full.
1403                  */
1404                 rd_limit = periph->sim->max_tagged_dev_openings * 2 / 3 + 1;
1405                 wr_limit = rd_limit;
1406
1407                 /*
1408                  * When TPS balancing is enabled we force wr_limit to 0
1409                  * as necessary to balance the read TPS against the write
1410                  * TPS.  A lower or higher read:write ratio may be selected
1411                  * via da_balance_ratio.
1412                  *
1413                  * wr_limit forcing stops queueing writes.  This is generally
1414                  * necessary because devices buffer writes and may starve
1415                  * reads even when plenty of read tags are available.
1416                  *
1417                  * When no reads are being done, normalize tps_rd to avoid
1418                  * instantly crowbaring the write tps.
1419                  */
1420                 if (da_balance_enable &&
1421                     periph->sim->max_tagged_dev_openings >= 8 &&
1422                     (bio_rd || softc->outstanding_cmds_rd) &&
1423                     (bio_wr || softc->outstanding_cmds_wr) &&
1424                     softc->tps_rd * 100 < softc->tps_wr * da_balance_ratio) {
1425                         wr_limit = 0;
1426                 } else if (bio_rd == NULL && softc->outstanding_cmds_rd == 0 &&
1427                            softc->tps_rd < softc->tps_wr * 2) {
1428                         softc->tps_rd += 100;
1429                 }
1430                 if (softc->tps_ticks != ticks) {
1431                         softc->tps_ticks = ticks;
1432                         softc->tps_rd = (softc->tps_rd * (hz - 1)) / hz;
1433                         softc->tps_wr = (softc->tps_wr * (hz - 1)) / hz;
1434                 }
1435
1436 #if 1
1437                 /* DEBUGGING */
1438                 static time_t savets;
1439                 if (da_balance_debug &&
1440                     time_uptime != savets && (bio_rd || bio_wr ||
1441                                               softc->outstanding_cmds_rd ||
1442                                               softc->outstanding_cmds_wr)) {
1443                         kprintf("softc=%p %d/%d %d/%d tps %ld/%ld\n",
1444                                 softc,
1445                                 softc->outstanding_cmds_rd, rd_limit,
1446                                 softc->outstanding_cmds_wr, wr_limit,
1447                                 softc->tps_rd / 100, softc->tps_wr / 100);
1448                         savets = time_uptime;
1449                 }
1450 #endif
1451                 if (bio_rd && softc->outstanding_cmds_rd < rd_limit) {
1452                         bio = bio_rd;
1453                         bioq_remove(&softc->bio_queue_rd, bio);
1454                         softc->tps_rd += 100;
1455                 } else if (bio_wr && softc->outstanding_cmds_wr < wr_limit) {
1456                         bio = bio_wr;
1457                         bioq_remove(&softc->bio_queue_wr, bio);
1458                         softc->tps_wr += 100;
1459                 } else {
1460                         if (bio_rd)
1461                                 softc->flags |= DA_FLAG_RD_LIMIT;
1462                         if (bio_wr)
1463                                 softc->flags |= DA_FLAG_WR_LIMIT;
1464                         xpt_release_ccb(start_ccb);
1465                         break;
1466                 }
1467
1468                 /*
1469                  * We can queue new work.
1470                  */
1471                 bp = bio->bio_buf;
1472
1473                 devstat_start_transaction(&softc->device_stats);
1474
1475                 tag_code = MSG_SIMPLE_Q_TAG;
1476
1477                 switch(bp->b_cmd) {
1478                 case BUF_CMD_READ:
1479                 case BUF_CMD_WRITE:
1480                         /*
1481                          * Block read/write op
1482                          */
1483                         KKASSERT(bio->bio_offset % softc->params.secsize == 0);
1484
1485                         scsi_read_write(
1486                                 &start_ccb->csio,
1487                                 da_retry_count,         /* retries */
1488                                 dadone,
1489                                 tag_code,
1490                                 (bp->b_cmd == BUF_CMD_READ),
1491                                 0,                      /* byte2 */
1492                                 softc->minimum_cmd_size,
1493                                 bio->bio_offset / softc->params.secsize,
1494                                 bp->b_bcount / softc->params.secsize,
1495                                 bp->b_data,
1496                                 bp->b_bcount,
1497                                 SSD_FULL_SIZE,          /* sense_len */
1498                                 da_default_timeout * 1000
1499                         );
1500                         break;
1501                 case BUF_CMD_FLUSH:
1502                         /*
1503                          * Silently complete a flush request if the device
1504                          * cannot handle it.
1505                          */
1506                         if (softc->quirks & DA_Q_NO_SYNC_CACHE) {
1507                                 xpt_release_ccb(start_ccb);
1508                                 start_ccb = NULL;
1509                                 devstat_end_transaction_buf(
1510                                         &softc->device_stats, bp);
1511                                 biodone(bio);
1512                         } else {
1513                                 scsi_synchronize_cache(
1514                                         &start_ccb->csio,
1515                                         1,              /* retries */
1516                                         dadone,         /* cbfcnp */
1517                                         MSG_SIMPLE_Q_TAG,
1518                                         0,              /* lba */
1519                                         0,              /* count (whole disk) */
1520                                         SSD_FULL_SIZE,
1521                                         da_default_timeout*1000 /* timeout */
1522                                 );
1523                         }
1524                         break;
1525                 case BUF_CMD_FREEBLKS:
1526                         if (softc->disk.d_info.d_trimflag & DA_FLAG_CAN_TRIM){
1527                                 start_ccb->csio.ccb_h.func_code = XPT_TRIM;
1528                                 break;
1529                         }
1530                 default:
1531                         xpt_release_ccb(start_ccb);
1532                         start_ccb = NULL;
1533                         panic("dastart: unrecognized bio cmd %d", bp->b_cmd);
1534                         break; /* NOT REACHED */
1535                 }
1536
1537                 /*
1538                  * Block out any asyncronous callbacks
1539                  * while we touch the pending ccb list.
1540                  */
1541                 if (start_ccb) {
1542                         start_ccb->ccb_h.ccb_state = DA_CCB_BUFFER_IO;
1543                         LIST_INSERT_HEAD(&softc->pending_ccbs,
1544                                          &start_ccb->ccb_h, periph_links.le);
1545                         if (bp->b_cmd == BUF_CMD_WRITE ||
1546                             bp->b_cmd == BUF_CMD_FLUSH) {
1547                                 ++softc->outstanding_cmds_wr;
1548                         } else {
1549                                 ++softc->outstanding_cmds_rd;
1550                         }
1551
1552                         /* We expect a unit attention from this device */
1553                         if ((softc->flags & DA_FLAG_RETRY_UA) != 0) {
1554                                 start_ccb->ccb_h.ccb_state |= DA_CCB_RETRY_UA;
1555                                 softc->flags &= ~DA_FLAG_RETRY_UA;
1556                         }
1557
1558                         start_ccb->ccb_h.ccb_bio = bio;
1559                         xpt_action(start_ccb);
1560                 }
1561
1562                 /*
1563                  * Be sure we stay scheduled if we have more work to do.
1564                  */
1565                 if (bioq_first(&softc->bio_queue_rd) ||
1566                     bioq_first(&softc->bio_queue_wr)) {
1567                         xpt_schedule(periph, 1);
1568                 }
1569                 break;
1570         }
1571         case DA_STATE_PROBE:
1572         {
1573                 struct ccb_scsiio *csio;
1574                 struct scsi_read_capacity_data *rcap;
1575
1576                 rcap = kmalloc(sizeof(*rcap), M_SCSIDA, M_INTWAIT | M_ZERO);
1577                 csio = &start_ccb->csio;
1578                 scsi_read_capacity(csio,
1579                                    /*retries*/4,
1580                                    dadone,
1581                                    MSG_SIMPLE_Q_TAG,
1582                                    rcap,
1583                                    SSD_FULL_SIZE,
1584                                    /*timeout*/5000);
1585                 start_ccb->ccb_h.ccb_bio = NULL;
1586                 start_ccb->ccb_h.ccb_state = DA_CCB_PROBE;
1587                 xpt_action(start_ccb);
1588                 break;
1589         }
1590         case DA_STATE_PROBE2:
1591         {
1592                 struct ccb_scsiio *csio;
1593                 struct scsi_read_capacity_data_16 *rcaplong;
1594
1595                 rcaplong = kmalloc(sizeof(*rcaplong), M_SCSIDA,
1596                                    M_INTWAIT | M_ZERO);
1597                 csio = &start_ccb->csio;
1598                 scsi_read_capacity_16(csio,
1599                                     /*retries*/ 4,
1600                                     /*cbfcnp*/ dadone,
1601                                     /*tag_action*/ MSG_SIMPLE_Q_TAG,
1602                                     /*lba*/ 0,
1603                                     /*reladr*/ 0,
1604                                     /*pmi*/ 0,
1605                                     rcaplong,
1606                                     /*sense_len*/ SSD_FULL_SIZE,
1607                                     /*timeout*/ 60000);
1608                 start_ccb->ccb_h.ccb_bio = NULL;
1609                 start_ccb->ccb_h.ccb_state = DA_CCB_PROBE2;
1610                 xpt_action(start_ccb);
1611                 break;
1612         }
1613         }
1614 }
1615
1616 static int
1617 cmd6workaround(union ccb *ccb)
1618 {
1619         struct scsi_rw_6 cmd6;
1620         struct scsi_rw_10 *cmd10;
1621         struct da_softc *softc;
1622         u_int8_t *cdb;
1623         int frozen;
1624
1625         cdb = ccb->csio.cdb_io.cdb_bytes;
1626
1627         /* Translation only possible if CDB is an array and cmd is R/W6 */
1628         if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0 ||
1629             (*cdb != READ_6 && *cdb != WRITE_6))
1630                 return 0;
1631
1632         xpt_print(ccb->ccb_h.path, "READ(6)/WRITE(6) not supported, "
1633             "increasing minimum_cmd_size to 10.\n");
1634         softc = (struct da_softc *)xpt_path_periph(ccb->ccb_h.path)->softc;
1635         softc->minimum_cmd_size = 10;
1636
1637         bcopy(cdb, &cmd6, sizeof(struct scsi_rw_6));
1638         cmd10 = (struct scsi_rw_10 *)cdb;
1639         cmd10->opcode = (cmd6.opcode == READ_6) ? READ_10 : WRITE_10;
1640         cmd10->byte2 = 0;
1641         scsi_ulto4b(scsi_3btoul(cmd6.addr), cmd10->addr);
1642         cmd10->reserved = 0;
1643         scsi_ulto2b(cmd6.length, cmd10->length);
1644         cmd10->control = cmd6.control;
1645         ccb->csio.cdb_len = sizeof(*cmd10);
1646
1647         /* Requeue request, unfreezing queue if necessary */
1648         frozen = (ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
1649         ccb->ccb_h.status = CAM_REQUEUE_REQ;
1650         xpt_action(ccb);
1651         if (frozen) {
1652                 cam_release_devq(ccb->ccb_h.path,
1653                                  /*relsim_flags*/0,
1654                                  /*reduction*/0,
1655                                  /*timeout*/0,
1656                                  /*getcount_only*/0);
1657         }
1658         return (ERESTART);
1659 }
1660
1661 static void
1662 dadone(struct cam_periph *periph, union ccb *done_ccb)
1663 {
1664         struct da_softc *softc;
1665         struct ccb_scsiio *csio;
1666         struct disk_info info;
1667
1668         softc = (struct da_softc *)periph->softc;
1669         csio = &done_ccb->csio;
1670         switch (csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) {
1671         case DA_CCB_BUFFER_IO:
1672         case DA_CCB_TRIM:
1673         {
1674                 struct buf *bp;
1675                 struct bio *bio;
1676                 int mustsched = 0;
1677
1678                 bio = (struct bio *)done_ccb->ccb_h.ccb_bio;
1679                 bp = bio->bio_buf;
1680                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1681                         int error;
1682                         int sf;
1683
1684                         if ((csio->ccb_h.ccb_state & DA_CCB_RETRY_UA) != 0)
1685                                 sf = SF_RETRY_UA;
1686                         else
1687                                 sf = 0;
1688
1689                         error = daerror(done_ccb, CAM_RETRY_SELTO, sf);
1690                         if (error == ERESTART) {
1691                                 /*
1692                                  * A retry was scheuled, so
1693                                  * just return.
1694                                  */
1695                                 return;
1696                         }
1697                         if (error != 0) {
1698                                 if (error == ENXIO) {
1699                                         /*
1700                                          * Catastrophic error.  Mark our pack as
1701                                          * invalid.
1702                                          */
1703                                         /*
1704                                          * XXX See if this is really a media
1705                                          * XXX change first?
1706                                          */
1707                                         xpt_print(periph->path,
1708                                             "Invalidating pack\n");
1709                                         softc->flags |= DA_FLAG_PACK_INVALID;
1710                                 }
1711
1712                                 /*
1713                                  * Return all queued write I/O's with EIO
1714                                  * so the client can retry these I/Os in the
1715                                  * proper order should it attempt to recover.
1716                                  *
1717                                  * Leave read I/O's alone.
1718                                  */
1719                                 daflushbioq(&softc->bio_queue_wr, EIO);
1720                                 bp->b_error = error;
1721                                 bp->b_resid = bp->b_bcount;
1722                                 bp->b_flags |= B_ERROR;
1723                         } else {
1724                                 bp->b_resid = csio->resid;
1725                                 bp->b_error = 0;
1726                                 if (bp->b_resid != 0)
1727                                         bp->b_flags |= B_ERROR;
1728                         }
1729                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1730                                 cam_release_devq(done_ccb->ccb_h.path,
1731                                                  /*relsim_flags*/0,
1732                                                  /*reduction*/0,
1733                                                  /*timeout*/0,
1734                                                  /*getcount_only*/0);
1735                 } else {
1736                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1737                                 panic("REQ_CMP with QFRZN");
1738                         bp->b_resid = csio->resid;
1739                         if (csio->resid > 0)
1740                                 bp->b_flags |= B_ERROR;
1741                 }
1742
1743                 /*
1744                  * Schedule the peripheral to pipeline further reads and
1745                  * writes.  A completed write wakes up more pending writes.
1746                  * A completed read must wake up on either pending reads
1747                  * or writes due to TPS balancing.
1748                  *
1749                  * Block out any asyncronous callbacks while we touch the
1750                  * pending ccb list.
1751                  */
1752                 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
1753                 if (bp->b_cmd == BUF_CMD_WRITE || bp->b_cmd == BUF_CMD_FLUSH) {
1754                         --softc->outstanding_cmds_wr;
1755                         if (softc->flags & DA_FLAG_WR_LIMIT) {
1756                                 softc->flags &= ~DA_FLAG_WR_LIMIT;
1757                                 mustsched = 1;
1758                         }
1759                 } else {
1760                         --softc->outstanding_cmds_rd;
1761                         if (softc->flags &
1762                             (DA_FLAG_RD_LIMIT | DA_FLAG_WR_LIMIT)) {
1763                                 softc->flags &=
1764                                         ~(DA_FLAG_RD_LIMIT | DA_FLAG_WR_LIMIT);
1765                                 mustsched = 1;
1766                         }
1767                 }
1768
1769                 devstat_end_transaction_buf(&softc->device_stats, bp);
1770                 if ((csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) ==
1771                     DA_CCB_TRIM) {
1772                         struct trim_request *req =
1773                             (struct trim_request *) csio->data_ptr;
1774                         int i;
1775
1776                         for (i = 1; i < softc->trim_max_ranges &&
1777                             req->bios[i]; i++) {
1778                                 struct bio *bp1 = req->bios[i];
1779
1780                                 bp1->bio_buf->b_resid = bp->b_resid;
1781                                 bp1->bio_buf->b_error = bp->b_error;
1782                                 if (bp->b_flags & B_ERROR)
1783                                         bp1->bio_buf->b_flags |= B_ERROR;
1784                                 biodone(bp1);
1785                         }
1786                         softc->trim_running = 0;
1787                         biodone(bio);
1788                         xpt_schedule(periph,1);
1789                 } else
1790                         biodone(bio);
1791
1792
1793                 if (mustsched)
1794                         xpt_schedule(periph, /*priority*/1);
1795
1796                 break;
1797         }
1798         case DA_CCB_PROBE:
1799         case DA_CCB_PROBE2:
1800         {
1801                 struct     scsi_read_capacity_data *rdcap;
1802                 struct     scsi_read_capacity_data_16 *rcaplong;
1803                 char       announce_buf[80];
1804                 int        doinfo = 0;
1805
1806                 rdcap = NULL;
1807                 rcaplong = NULL;
1808                 if (softc->state == DA_STATE_PROBE)
1809                         rdcap =(struct scsi_read_capacity_data *)csio->data_ptr;
1810                 else
1811                         rcaplong = (struct scsi_read_capacity_data_16 *)
1812                                     csio->data_ptr;
1813
1814                 bzero(&info, sizeof(info));
1815                 info.d_type = DTYPE_SCSI;
1816                 info.d_serialno = xpt_path_serialno(periph->path);
1817
1818                 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
1819                         struct disk_params *dp;
1820                         uint32_t block_size;
1821                         uint64_t maxsector;
1822
1823                         if (softc->state == DA_STATE_PROBE) {
1824                                 block_size = scsi_4btoul(rdcap->length);
1825                                 maxsector = scsi_4btoul(rdcap->addr);
1826
1827                                 /*
1828                                  * According to SBC-2, if the standard 10
1829                                  * byte READ CAPACITY command returns 2^32,
1830                                  * we should issue the 16 byte version of
1831                                  * the command, since the device in question
1832                                  * has more sectors than can be represented
1833                                  * with the short version of the command.
1834                                  */
1835                                 if (maxsector == 0xffffffff) {
1836                                         softc->state = DA_STATE_PROBE2;
1837                                         kfree(rdcap, M_SCSIDA);
1838                                         xpt_release_ccb(done_ccb);
1839                                         xpt_schedule(periph, /*priority*/5);
1840                                         return;
1841                                 }
1842                         } else {
1843                                 block_size = scsi_4btoul(rcaplong->length);
1844                                 maxsector = scsi_8btou64(rcaplong->addr);
1845                         }
1846                         dasetgeom(periph, block_size, maxsector);
1847                         dp = &softc->params;
1848                         ksnprintf(announce_buf, sizeof(announce_buf),
1849                                 "%juMB (%ju %u byte sectors: %dH %dS/T %dC)",
1850                                 (uintmax_t) (((uintmax_t)dp->secsize *
1851                                 dp->sectors) / (1024*1024)),
1852                                 (uintmax_t)dp->sectors,
1853                                 dp->secsize, dp->heads, dp->secs_per_track,
1854                                 dp->cylinders);
1855
1856                         info.d_media_blksize = softc->params.secsize;
1857                         info.d_media_blocks = softc->params.sectors;
1858                         info.d_media_size = 0;
1859                         info.d_secpertrack = softc->params.secs_per_track;
1860                         info.d_nheads = softc->params.heads;
1861                         info.d_ncylinders = softc->params.cylinders;
1862                         info.d_secpercyl = softc->params.heads *
1863                                                 softc->params.secs_per_track;
1864                         info.d_serialno = xpt_path_serialno(periph->path);
1865                         doinfo = 1;
1866                 } else {
1867                         int     error;
1868
1869                         announce_buf[0] = '\0';
1870
1871                         /*
1872                          * Retry any UNIT ATTENTION type errors.  They
1873                          * are expected at boot.
1874                          */
1875                         error = daerror(done_ccb, CAM_RETRY_SELTO,
1876                                         SF_RETRY_UA|SF_NO_PRINT);
1877                         if (error == ERESTART) {
1878                                 /*
1879                                  * A retry was scheuled, so
1880                                  * just return.
1881                                  */
1882                                 return;
1883                         } else if (error != 0) {
1884                                 struct scsi_sense_data *sense;
1885                                 int asc, ascq;
1886                                 int sense_key, error_code;
1887                                 int have_sense;
1888                                 cam_status status;
1889                                 struct ccb_getdev *cgd;
1890
1891                                 /* Don't wedge this device's queue */
1892                                 status = done_ccb->ccb_h.status;
1893                                 if ((status & CAM_DEV_QFRZN) != 0)
1894                                         cam_release_devq(done_ccb->ccb_h.path,
1895                                                          /*relsim_flags*/0,
1896                                                          /*reduction*/0,
1897                                                          /*timeout*/0,
1898                                                          /*getcount_only*/0);
1899
1900                                 cgd = &xpt_alloc_ccb()->cgd;
1901                                 xpt_setup_ccb(&cgd->ccb_h,
1902                                               done_ccb->ccb_h.path,
1903                                               /* priority */ 1);
1904                                 cgd->ccb_h.func_code = XPT_GDEV_TYPE;
1905                                 xpt_action((union ccb *)cgd);
1906
1907                                 if (((csio->ccb_h.flags & CAM_SENSE_PHYS) != 0)
1908                                  || ((csio->ccb_h.flags & CAM_SENSE_PTR) != 0)
1909                                  || ((status & CAM_AUTOSNS_VALID) == 0))
1910                                         have_sense = FALSE;
1911                                 else
1912                                         have_sense = TRUE;
1913
1914                                 if (have_sense) {
1915                                         sense = &csio->sense_data;
1916                                         scsi_extract_sense(sense, &error_code,
1917                                                            &sense_key,
1918                                                            &asc, &ascq);
1919                                 }
1920                                 /*
1921                                  * Attach to anything that claims to be a
1922                                  * direct access or optical disk device,
1923                                  * as long as it doesn't return a "Logical
1924                                  * unit not supported" (0x25) error.
1925                                  */
1926                                 if ((have_sense) && (asc != 0x25)
1927                                  && (error_code == SSD_CURRENT_ERROR)) {
1928                                         const char *sense_key_desc;
1929                                         const char *asc_desc;
1930
1931                                         scsi_sense_desc(sense_key, asc, ascq,
1932                                                         &cgd->inq_data,
1933                                                         &sense_key_desc,
1934                                                         &asc_desc);
1935                                         ksnprintf(announce_buf,
1936                                             sizeof(announce_buf),
1937                                                 "Attempt to query device "
1938                                                 "size failed: %s, %s",
1939                                                 sense_key_desc,
1940                                                 asc_desc);
1941                                         info.d_media_blksize = 512;
1942                                         doinfo = 1;
1943                                 } else {
1944                                         if (have_sense)
1945                                                 scsi_sense_print(
1946                                                         &done_ccb->csio);
1947                                         else {
1948                                                 xpt_print(periph->path,
1949                                                     "got CAM status %#x\n",
1950                                                     done_ccb->ccb_h.status);
1951                                         }
1952
1953                                         xpt_print(periph->path, "fatal error, "
1954                                             "failed to attach to device\n");
1955
1956                                         /*
1957                                          * Free up resources.
1958                                          */
1959                                         cam_periph_invalidate(periph);
1960                                 }
1961                                 xpt_free_ccb(&cgd->ccb_h);
1962                         }
1963                 }
1964                 kfree(csio->data_ptr, M_SCSIDA);
1965                 if (announce_buf[0] != '\0')
1966                         xpt_announce_periph(periph, announce_buf);
1967
1968                 if (softc->trim_max_ranges) {
1969                         info.d_trimflag |= DA_FLAG_CAN_TRIM;
1970                         kprintf("%s%d: supports TRIM\n",
1971                             periph->periph_name,
1972                             periph->unit_number);
1973                 }
1974                 softc->state = DA_STATE_NORMAL;
1975
1976                 /*
1977                  * Since our peripheral may be invalidated by an error
1978                  * above or an external event, we must release our CCB
1979                  * before releasing the probe lock on the peripheral.
1980                  * The peripheral will only go away once the last lock
1981                  * is removed, and we need it around for the CCB release
1982                  * operation.
1983                  */
1984                 xpt_release_ccb(done_ccb);
1985                 cam_periph_unhold(periph, 0);
1986                 if (doinfo) {
1987                         CAM_SIM_UNLOCK(periph->sim);
1988                         disk_setdiskinfo(&softc->disk, &info);
1989                         CAM_SIM_LOCK(periph->sim);
1990
1991                         /*
1992                          * Create our sysctl variables, now that we know
1993                          * we have successfully attached.
1994                          */
1995                         taskqueue_enqueue(taskqueue_thread[mycpuid],
1996                                           &softc->sysctl_task);
1997                 }
1998                 return;
1999         }
2000         case DA_CCB_WAITING:
2001         {
2002                 /* Caller will release the CCB */
2003                 wakeup(&done_ccb->ccb_h.cbfcnp);
2004                 return;
2005         }
2006         case DA_CCB_DUMP:
2007                 /* No-op.  We're polling */
2008                 return;
2009         case DA_CCB_POLLED:
2010                 /* Caller releases ccb */
2011                 wakeup(&done_ccb->ccb_h.cbfcnp);
2012                 return;
2013         default:
2014                 break;
2015         }
2016         xpt_release_ccb(done_ccb);
2017 }
2018
2019 static int
2020 daerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
2021 {
2022         struct da_softc   *softc;
2023         struct cam_periph *periph;
2024         int error;
2025
2026         periph = xpt_path_periph(ccb->ccb_h.path);
2027         softc = (struct da_softc *)periph->softc;
2028
2029         /*
2030          * Automatically detect devices that do not support
2031          * READ(6)/WRITE(6) and upgrade to using 10 byte cdbs.
2032          */
2033         error = 0;
2034         if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INVALID) {
2035                 error = cmd6workaround(ccb);
2036         } else if (((ccb->ccb_h.status & CAM_STATUS_MASK) ==
2037                    CAM_SCSI_STATUS_ERROR)
2038          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)
2039          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
2040          && ((ccb->ccb_h.flags & CAM_SENSE_PHYS) == 0)
2041          && ((ccb->ccb_h.flags & CAM_SENSE_PTR) == 0)) {
2042                 int sense_key, error_code, asc, ascq;
2043
2044                 scsi_extract_sense(&ccb->csio.sense_data,
2045                                    &error_code, &sense_key, &asc, &ascq);
2046                 if (sense_key == SSD_KEY_ILLEGAL_REQUEST)
2047                         error = cmd6workaround(ccb);
2048         }
2049         if (error == ERESTART)
2050                 return (ERESTART);
2051
2052         /*
2053          * XXX
2054          * Until we have a better way of doing pack validation,
2055          * don't treat UAs as errors.
2056          */
2057         sense_flags |= SF_RETRY_UA;
2058         return(cam_periph_error(ccb, cam_flags, sense_flags,
2059                                 &softc->saved_ccb));
2060 }
2061
2062 static void
2063 daprevent(struct cam_periph *periph, int action)
2064 {
2065         struct  da_softc *softc;
2066         union   ccb *ccb;
2067         int     error;
2068
2069         softc = (struct da_softc *)periph->softc;
2070
2071         if (((action == PR_ALLOW)
2072           && (softc->flags & DA_FLAG_PACK_LOCKED) == 0)
2073          || ((action == PR_PREVENT)
2074           && (softc->flags & DA_FLAG_PACK_LOCKED) != 0)) {
2075                 return;
2076         }
2077
2078         ccb = cam_periph_getccb(periph, /*priority*/1);
2079         ccb->ccb_h.ccb_state = DA_CCB_POLLED;
2080
2081         scsi_prevent(&ccb->csio,
2082                      /*retries*/1,
2083                      /*cbcfp*/dadone,
2084                      MSG_SIMPLE_Q_TAG,
2085                      action,
2086                      SSD_FULL_SIZE,
2087                      5000);
2088
2089         error = cam_periph_runccb(ccb, /*error_routine*/NULL, CAM_RETRY_SELTO,
2090                                   SF_RETRY_UA, &softc->device_stats);
2091
2092         if (error == 0) {
2093                 if (action == PR_ALLOW)
2094                         softc->flags &= ~DA_FLAG_PACK_LOCKED;
2095                 else
2096                         softc->flags |= DA_FLAG_PACK_LOCKED;
2097         }
2098
2099         xpt_release_ccb(ccb);
2100 }
2101
2102 /*
2103  * Check media on open, e.g. card reader devices which had no initial media.
2104  */
2105 static int
2106 dacheckmedia(struct cam_periph *periph)
2107 {
2108         struct disk_params *dp;
2109         struct da_softc *softc;
2110         struct disk_info info;
2111         int error;
2112         int mute;
2113
2114         softc = (struct da_softc *)periph->softc;
2115         dp = &softc->params;
2116
2117         if (softc->flags & DA_FLAG_CAP_MUTE)    /* additional ccb flags */
2118                 mute = CAM_QUIET;
2119         else
2120                 mute = 0;
2121
2122         error = dagetcapacity(periph, mute);
2123
2124         /*
2125          * Only reprobe on initial open and if the media is removable.
2126          *
2127          * NOTE: If we setdiskinfo() it will take the device probe
2128          *       a bit of time to probe the slices and partitions,
2129          *       and mess up booting.  So avoid if nothing has changed.
2130          *       XXX
2131          */
2132         if (softc->flags & DA_FLAG_OPEN)
2133                 return (error);
2134         if ((softc->flags & DA_FLAG_PACK_REMOVABLE) == 0)
2135                 return (error);
2136
2137         bzero(&info, sizeof(info));
2138         info.d_type = DTYPE_SCSI;
2139         info.d_serialno = xpt_path_serialno(periph->path);
2140
2141         if (error == 0) {
2142                 CAM_SIM_UNLOCK(periph->sim);
2143                 info.d_media_blksize = softc->params.secsize;
2144                 info.d_media_blocks = softc->params.sectors;
2145                 info.d_media_size = 0;
2146                 info.d_secpertrack = softc->params.secs_per_track;
2147                 info.d_nheads = softc->params.heads;
2148                 info.d_ncylinders = softc->params.cylinders;
2149                 info.d_secpercyl = softc->params.heads *
2150                                         softc->params.secs_per_track;
2151                 info.d_serialno = xpt_path_serialno(periph->path);
2152                 if (info.d_media_blocks != softc->disk.d_info.d_media_blocks) {
2153                         kprintf("%s%d: open removable media: "
2154                                 "%juMB (%ju %u byte sectors: %dH %dS/T %dC)\n",
2155                                 periph->periph_name, periph->unit_number,
2156                                 (uintmax_t)(((uintmax_t)dp->secsize *
2157                                              dp->sectors) / (1024*1024)),
2158                                 (uintmax_t)dp->sectors, dp->secsize,
2159                                 dp->heads, dp->secs_per_track, dp->cylinders);
2160                         disk_setdiskinfo(&softc->disk, &info);
2161                 }
2162                 CAM_SIM_LOCK(periph->sim);
2163         } else {
2164                 if (!mute || bootverbose) {
2165                         kprintf("%s%d: open removable media: "
2166                                 "no media present\n",
2167                                 periph->periph_name, periph->unit_number);
2168                 }
2169                 info.d_media_blksize = 512;
2170                 disk_setdiskinfo(&softc->disk, &info);
2171         }
2172         return (error);
2173 }
2174
2175 static int
2176 dagetcapacity(struct cam_periph *periph, int ccbflags)
2177 {
2178         struct da_softc *softc;
2179         union ccb *ccb;
2180         struct scsi_read_capacity_data *rcap;
2181         struct scsi_read_capacity_data_16 *rcaplong;
2182         uint32_t block_len;
2183         uint64_t maxsector;
2184         int error;
2185
2186         softc = (struct da_softc *)periph->softc;
2187         block_len = 0;
2188         maxsector = 0;
2189         error = 0;
2190
2191         /* Do a read capacity */
2192         rcap = (struct scsi_read_capacity_data *)kmalloc(sizeof(*rcaplong),
2193                                                          M_SCSIDA, M_INTWAIT);
2194
2195         ccb = cam_periph_getccb(periph, /*priority*/1);
2196         ccb->ccb_h.ccb_state = DA_CCB_POLLED;
2197
2198         scsi_read_capacity(&ccb->csio,
2199                            /*retries*/4,
2200                            /*cbfncp*/dadone,
2201                            MSG_SIMPLE_Q_TAG,
2202                            rcap,
2203                            SSD_FULL_SIZE,
2204                            /*timeout*/60000);
2205         ccb->ccb_h.ccb_bio = NULL;
2206         ccb->ccb_h.flags |= ccbflags;
2207
2208         error = cam_periph_runccb(ccb, daerror,
2209                                   /*cam_flags*/CAM_RETRY_SELTO,
2210                                   /*sense_flags*/SF_RETRY_UA,
2211                                   &softc->device_stats);
2212
2213         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
2214                 cam_release_devq(ccb->ccb_h.path,
2215                                  /*relsim_flags*/0,
2216                                  /*reduction*/0,
2217                                  /*timeout*/0,
2218                                  /*getcount_only*/0);
2219
2220         if (error == 0) {
2221                 block_len = scsi_4btoul(rcap->length);
2222                 maxsector = scsi_4btoul(rcap->addr);
2223
2224                 if (maxsector != 0xffffffff)
2225                         goto done;
2226         } else
2227                 goto done;
2228
2229         rcaplong = (struct scsi_read_capacity_data_16 *)rcap;
2230
2231         scsi_read_capacity_16(&ccb->csio,
2232                               /*retries*/ 4,
2233                               /*cbfcnp*/ dadone,
2234                               /*tag_action*/ MSG_SIMPLE_Q_TAG,
2235                               /*lba*/ 0,
2236                               /*reladr*/ 0,
2237                               /*pmi*/ 0,
2238                               rcaplong,
2239                               /*sense_len*/ SSD_FULL_SIZE,
2240                               /*timeout*/ 60000);
2241         ccb->ccb_h.ccb_bio = NULL;
2242
2243         error = cam_periph_runccb(ccb, daerror,
2244                                   /*cam_flags*/CAM_RETRY_SELTO,
2245                                   /*sense_flags*/SF_RETRY_UA,
2246                                   &softc->device_stats);
2247
2248         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
2249                 cam_release_devq(ccb->ccb_h.path,
2250                                  /*relsim_flags*/0,
2251                                  /*reduction*/0,
2252                                  /*timeout*/0,
2253                                  /*getcount_only*/0);
2254
2255         if (error == 0) {
2256                 block_len = scsi_4btoul(rcaplong->length);
2257                 maxsector = scsi_8btou64(rcaplong->addr);
2258         }
2259
2260 done:
2261
2262         if (error == 0)
2263                 dasetgeom(periph, block_len, maxsector);
2264
2265         xpt_release_ccb(ccb);
2266
2267         kfree(rcap, M_SCSIDA);
2268
2269         return (error);
2270 }
2271
2272 static void
2273 dasetgeom(struct cam_periph *periph, uint32_t block_len, uint64_t maxsector)
2274 {
2275         struct ccb_calc_geometry *ccg;
2276         struct da_softc *softc;
2277         struct disk_params *dp;
2278
2279         softc = (struct da_softc *)periph->softc;
2280
2281         dp = &softc->params;
2282         dp->secsize = block_len;
2283         dp->sectors = maxsector + 1;
2284         /*
2285          * Have the controller provide us with a geometry
2286          * for this disk.  The only time the geometry
2287          * matters is when we boot and the controller
2288          * is the only one knowledgeable enough to come
2289          * up with something that will make this a bootable
2290          * device.
2291          */
2292         ccg = &xpt_alloc_ccb()->ccg;
2293         xpt_setup_ccb(&ccg->ccb_h, periph->path, /*priority*/1);
2294         ccg->ccb_h.func_code = XPT_CALC_GEOMETRY;
2295         ccg->block_size = dp->secsize;
2296         ccg->volume_size = dp->sectors;
2297         ccg->heads = 0;
2298         ccg->secs_per_track = 0;
2299         ccg->cylinders = 0;
2300         xpt_action((union ccb*)ccg);
2301         if ((ccg->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
2302                 /*
2303                  * We don't know what went wrong here- but just pick
2304                  * a geometry so we don't have nasty things like divide
2305                  * by zero.
2306                  */
2307                 dp->heads = 255;
2308                 dp->secs_per_track = 255;
2309                 dp->cylinders = dp->sectors / (255 * 255);
2310                 if (dp->cylinders == 0) {
2311                         dp->cylinders = 1;
2312                 }
2313         } else {
2314                 dp->heads = ccg->heads;
2315                 dp->secs_per_track = ccg->secs_per_track;
2316                 dp->cylinders = ccg->cylinders;
2317         }
2318         xpt_free_ccb(&ccg->ccb_h);
2319 }
2320
2321 /*
2322  * Step through all DA peripheral drivers, and if the device is still open,
2323  * sync the disk cache to physical media.
2324  */
2325 static void
2326 dashutdown(void * arg, int howto)
2327 {
2328         struct cam_periph *periph;
2329         struct da_softc *softc;
2330
2331         TAILQ_FOREACH(periph, &dadriver.units, unit_links) {
2332                 union ccb *ccb;
2333
2334                 cam_periph_lock(periph);
2335                 softc = (struct da_softc *)periph->softc;
2336
2337                 /*
2338                  * We only sync the cache if the drive is still open, and
2339                  * if the drive is capable of it..
2340                  */
2341                 if (((softc->flags & DA_FLAG_OPEN) == 0)
2342                  || (softc->quirks & DA_Q_NO_SYNC_CACHE)) {
2343                         cam_periph_unlock(periph);
2344                         continue;
2345                 }
2346
2347                 ccb = xpt_alloc_ccb();
2348                 xpt_setup_ccb(&ccb->ccb_h, periph->path, /*priority*/1);
2349
2350                 ccb->ccb_h.ccb_state = DA_CCB_DUMP;
2351                 scsi_synchronize_cache(&ccb->csio,
2352                                        /*retries*/1,
2353                                        /*cbfcnp*/dadone,
2354                                        MSG_SIMPLE_Q_TAG,
2355                                        /*begin_lba*/0, /* whole disk */
2356                                        /*lb_count*/0,
2357                                        SSD_FULL_SIZE,
2358                                        60 * 60 * 1000);
2359
2360                 xpt_polled_action(ccb);
2361
2362                 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
2363                         if (((ccb->ccb_h.status & CAM_STATUS_MASK) ==
2364                              CAM_SCSI_STATUS_ERROR)
2365                          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)){
2366                                 int error_code, sense_key, asc, ascq;
2367
2368                                 scsi_extract_sense(&ccb->csio.sense_data,
2369                                                    &error_code, &sense_key,
2370                                                    &asc, &ascq);
2371
2372                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
2373                                         scsi_sense_print(&ccb->csio);
2374                         } else {
2375                                 xpt_print(periph->path, "Synchronize "
2376                                     "cache failed, status == 0x%x, scsi status "
2377                                     "== 0x%x\n", ccb->ccb_h.status,
2378                                     ccb->csio.scsi_status);
2379                         }
2380                 }
2381
2382                 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
2383                         cam_release_devq(ccb->ccb_h.path,
2384                                          /*relsim_flags*/0,
2385                                          /*reduction*/0,
2386                                          /*timeout*/0,
2387                                          /*getcount_only*/0);
2388
2389                 cam_periph_unlock(periph);
2390                 xpt_free_ccb(&ccb->ccb_h);
2391         }
2392 }
2393
2394 #else /* !_KERNEL */
2395
2396 /*
2397  * XXX This is only left out of the kernel build to silence warnings.  If,
2398  * for some reason this function is used in the kernel, the ifdefs should
2399  * be moved so it is included both in the kernel and userland.
2400  */
2401 void
2402 scsi_format_unit(struct ccb_scsiio *csio, u_int32_t retries,
2403                  void (*cbfcnp)(struct cam_periph *, union ccb *),
2404                  u_int8_t tag_action, u_int8_t byte2, u_int16_t ileave,
2405                  u_int8_t *data_ptr, u_int32_t dxfer_len, u_int8_t sense_len,
2406                  u_int32_t timeout)
2407 {
2408         struct scsi_format_unit *scsi_cmd;
2409
2410         scsi_cmd = (struct scsi_format_unit *)&csio->cdb_io.cdb_bytes;
2411         scsi_cmd->opcode = FORMAT_UNIT;
2412         scsi_cmd->byte2 = byte2;
2413         scsi_ulto2b(ileave, scsi_cmd->interleave);
2414
2415         cam_fill_csio(csio,
2416                       retries,
2417                       cbfcnp,
2418                       /*flags*/ (dxfer_len > 0) ? CAM_DIR_OUT : CAM_DIR_NONE,
2419                       tag_action,
2420                       data_ptr,
2421                       dxfer_len,
2422                       sense_len,
2423                       sizeof(*scsi_cmd),
2424                       timeout);
2425 }
2426
2427 #endif /* _KERNEL */