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 #include <sys/ioctl_compat.h>
  50
  51 #include <sys/buf2.h>
  52 #include <sys/thread2.h>
  53 #include <sys/mplock2.h>
  54
  55 #endif /* _KERNEL */
  56
  57 #ifdef _KERNEL
  58 #include <vm/pmap.h>
  59 #endif
  60
  61 #ifndef _KERNEL
  62 #include <stdio.h>
  63 #include <string.h>
  64 #endif /* _KERNEL */
  65
  66 #include <sys/camlib.h>
  67 #include "../cam.h"
  68 #include "../cam_ccb.h"
  69 #include "../cam_extend.h"
  70 #include "../cam_periph.h"
  71 #include "../cam_xpt_periph.h"
  72 #include "../cam_sim.h"
  73
  74 #include "scsi_message.h"
  75
  76 #ifndef _KERNEL
  77 #include "scsi_da.h"
  78 #endif /* !_KERNEL */
  79
  80 #ifdef _KERNEL
  81 typedef enum {
  82         DA_STATE_PROBE,
  83         DA_STATE_PROBE2,
  84         DA_STATE_NORMAL
  85 } da_state;
  86
  87 typedef enum {
  88         DA_FLAG_PACK_INVALID    = 0x001,
  89         DA_FLAG_NEW_PACK        = 0x002,
  90         DA_FLAG_PACK_LOCKED     = 0x004,
  91         DA_FLAG_PACK_REMOVABLE  = 0x008,
  92         DA_FLAG_TAGGED_QUEUING  = 0x010,
  93         DA_FLAG_NEED_OTAG       = 0x020,
  94         DA_FLAG_WENT_IDLE       = 0x040,
  95         DA_FLAG_RETRY_UA        = 0x080,
  96         DA_FLAG_OPEN            = 0x100,
  97         DA_FLAG_SCTX_INIT       = 0x200,
  98         DA_FLAG_RD_LIMIT        = 0x400,
  99         DA_FLAG_WR_LIMIT        = 0x800,
 100         DA_FLAG_CAN_TRIM        = 0x1000
 101 } da_flags;
 102
 103 typedef enum {
 104         DA_Q_NONE               = 0x00,
 105         DA_Q_NO_SYNC_CACHE      = 0x01,
 106         DA_Q_NO_6_BYTE          = 0x02,
 107         DA_Q_NO_PREVENT         = 0x04
 108 } da_quirks;
 109
 110 typedef enum {
 111         DA_CCB_PROBE            = 0x01,
 112         DA_CCB_PROBE2           = 0x02,
 113         DA_CCB_BUFFER_IO        = 0x03,
 114         DA_CCB_WAITING          = 0x04,
 115         DA_CCB_DUMP             = 0x05,
 116         DA_CCB_TRIM             = 0x06,
 117         DA_CCB_TYPE_MASK        = 0x0F,
 118         DA_CCB_RETRY_UA         = 0x10
 119 } da_ccb_state;
 120
 121 /* Offsets into our private area for storing information */
 122 #define ccb_state       ppriv_field0
 123 #define ccb_bio         ppriv_ptr1
 124
 125 struct disk_params {
 126         u_int8_t  heads;
 127         u_int32_t cylinders;
 128         u_int8_t  secs_per_track;
 129         u_int32_t secsize;      /* Number of bytes/sector */
 130         u_int64_t sectors;      /* total number sectors */
 131 };
 132
 133 #define TRIM_MAX_BLOCKS 8
 134 #define TRIM_MAX_RANGES TRIM_MAX_BLOCKS * 64
 135 struct trim_request {
 136         uint8_t         data[TRIM_MAX_RANGES * 8];
 137         struct bio      *bios[TRIM_MAX_RANGES];
 138 };
 139
 140 struct da_softc {
 141         struct   bio_queue_head bio_queue_rd;
 142         struct   bio_queue_head bio_queue_wr;
 143         struct   bio_queue_head bio_queue_trim;
 144         struct   devstat device_stats;
 145         SLIST_ENTRY(da_softc) links;
 146         LIST_HEAD(, ccb_hdr) pending_ccbs;
 147         da_state state;
 148         da_flags flags;
 149         da_quirks quirks;
 150         int      minimum_cmd_size;
 151         int      ordered_tag_count;
 152         int      outstanding_cmds_rd;
 153         int      outstanding_cmds_wr;
 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 callout          sendordered_c;
 164         struct trim_request     trim_req;
 165 };
 166
 167 struct da_quirk_entry {
 168         struct scsi_inquiry_pattern inq_pat;
 169         da_quirks quirks;
 170 };
 171
 172 static const char quantum[] = "QUANTUM";
 173 static const char microp[] = "MICROP";
 174
 175 static struct da_quirk_entry da_quirk_table[] =
 176 {
 177         /* SPI, FC devices */
 178         {
 179                 /*
 180                  * Fujitsu M2513A MO drives.
 181                  * Tested devices: M2513A2 firmware versions 1200 & 1300.
 182                  * (dip switch selects whether T_DIRECT or T_OPTICAL device)
 183                  * Reported by: W.Scholten <whs@xs4all.nl>
 184                  */
 185                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
 186                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 187         },
 188         {
 189                 /* See above. */
 190                 {T_OPTICAL, SIP_MEDIA_REMOVABLE, "FUJITSU", "M2513A", "*"},
 191                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 192         },
 193         {
 194                 /*
 195                  * This particular Fujitsu drive doesn't like the
 196                  * synchronize cache command.
 197                  * Reported by: Tom Jackson <toj@gorilla.net>
 198                  */
 199                 {T_DIRECT, SIP_MEDIA_FIXED, "FUJITSU", "M2954*", "*"},
 200                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 201         },
 202         {
 203                 /*
 204                  * This drive doesn't like the synchronize cache command
 205                  * either.  Reported by: Matthew Jacob <mjacob@feral.com>
 206                  * in NetBSD PR kern/6027, August 24, 1998.
 207                  */
 208                 {T_DIRECT, SIP_MEDIA_FIXED, microp, "2217*", "*"},
 209                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 210         },
 211         {
 212                 /*
 213                  * This drive doesn't like the synchronize cache command
 214                  * either.  Reported by: Hellmuth Michaelis (hm@kts.org)
 215                  * (PR 8882).
 216                  */
 217                 {T_DIRECT, SIP_MEDIA_FIXED, microp, "2112*", "*"},
 218                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 219         },
 220         {
 221                 /*
 222                  * Doesn't like the synchronize cache command.
 223                  * Reported by: Blaz Zupan <blaz@gold.amis.net>
 224                  */
 225                 {T_DIRECT, SIP_MEDIA_FIXED, "NEC", "D3847*", "*"},
 226                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 227         },
 228         {
 229                 /*
 230                  * Doesn't like the synchronize cache command.
 231                  * Reported by: Blaz Zupan <blaz@gold.amis.net>
 232                  */
 233                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "MAVERICK 540S", "*"},
 234                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 235         },
 236         {
 237                 /*
 238                  * Doesn't like the synchronize cache command.
 239                  */
 240                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS525S", "*"},
 241                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 242         },
 243         {
 244                 /*
 245                  * Doesn't like the synchronize cache command.
 246                  * Reported by: walter@pelissero.de
 247                  */
 248                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "LPS540S", "*"},
 249                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 250         },
 251         {
 252                 /*
 253                  * Doesn't work correctly with 6 byte reads/writes.
 254                  * Returns illegal request, and points to byte 9 of the
 255                  * 6-byte CDB.
 256                  * Reported by:  Adam McDougall <bsdx@spawnet.com>
 257                  */
 258                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 4*", "*"},
 259                 /*quirks*/ DA_Q_NO_6_BYTE
 260         },
 261         {
 262                 /* See above. */
 263                 {T_DIRECT, SIP_MEDIA_FIXED, quantum, "VIKING 2*", "*"},
 264                 /*quirks*/ DA_Q_NO_6_BYTE
 265         },
 266         {
 267                 /*
 268                  * Doesn't like the synchronize cache command.
 269                  * Reported by: walter@pelissero.de
 270                  */
 271                 {T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CP3500*", "*"},
 272                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 273         },
 274         {
 275                 /*
 276                  * The CISS RAID controllers do not support SYNC_CACHE
 277                  */
 278                 {T_DIRECT, SIP_MEDIA_FIXED, "COMPAQ", "RAID*", "*"},
 279                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 280         },
 281         {
 282                 /*
 283                  * The same goes for the mly(4) controllers
 284                  */
 285                 {T_DIRECT, SIP_MEDIA_FIXED, "MLY*", "*", "MYLX"},
 286                 /*quirks*/ DA_Q_NO_SYNC_CACHE
 287         },
 288         /*
 289          * USB mass storage devices supported by umass(4)
 290          *
 291          * NOTE: USB attachments automatically set DA_Q_NO_SYNC_CACHE so
 292          *       it does not have to be specified here.
 293          */
 294         {
 295                 /*
 296                  * Creative Nomad MUVO mp3 player (USB)
 297                  * PR: kern/53094
 298                  */
 299                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "NOMAD_MUVO", "*"},
 300                 /*quirks*/ DA_Q_NO_PREVENT
 301         },
 302         {
 303                 /*
 304                  * Sigmatel USB Flash MP3 Player
 305                  * PR: kern/57046
 306                  */
 307                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "SigmaTel", "MSCN", "*"},
 308                 /*quirks*/ DA_Q_NO_PREVENT
 309         },
 310         {
 311                 /*
 312                  * SEAGRAND NP-900 MP3 Player
 313                  * PR: kern/64563
 314                  */
 315                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "SEAGRAND", "NP-900*", "*"},
 316                 /*quirks*/ DA_Q_NO_PREVENT
 317         },
 318         {
 319                 /*
 320                  * Creative MUVO Slim mp3 player (USB)
 321                  * PR: usb/86131
 322                  */
 323                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "CREATIVE", "MuVo Slim",
 324                 "*"}, /*quirks*/ DA_Q_NO_PREVENT
 325         },
 326         {
 327                 /*
 328                  * Philips USB Key Audio KEY013
 329                  * PR: usb/68412
 330                  */
 331                 {T_DIRECT, SIP_MEDIA_REMOVABLE, "PHILIPS", "Key*", "*"},
 332                 /*quirks*/ DA_Q_NO_PREVENT
 333         },
 334 };
 335
 336 static  d_open_t        daopen;
 337 static  d_close_t       daclose;
 338 static  d_strategy_t    dastrategy;
 339 static  d_dump_t        dadump;
 340 static  d_ioctl_t       daioctl;
 341 static  periph_init_t   dainit;
 342 static  void            daasync(void *callback_arg, u_int32_t code,
 343                                 struct cam_path *path, void *arg);
 344 static  int             dacmdsizesysctl(SYSCTL_HANDLER_ARGS);
 345 static  periph_ctor_t   daregister;
 346 static  periph_dtor_t   dacleanup;
 347 static  periph_start_t  dastart;
 348 static  periph_oninv_t  daoninvalidate;
 349 static  void            dadone(struct cam_periph *periph,
 350                                union ccb *done_ccb);
 351 static  int             daerror(union ccb *ccb, u_int32_t cam_flags,
 352                                 u_int32_t sense_flags);
 353 static void             daprevent(struct cam_periph *periph, int action);
 354 static int              dagetcapacity(struct cam_periph *periph);
 355 static int              dacheckmedia(struct cam_periph *periph);
 356 static void             dasetgeom(struct cam_periph *periph, uint32_t block_len,
 357                                   uint64_t maxsector);
 358 static void             daflushbioq(struct bio_queue_head *bioq, int error);
 359 static timeout_t        dasendorderedtag;
 360 static void             dashutdown(void *arg, int howto);
 361
 362 #ifndef DA_DEFAULT_TIMEOUT
 363 #define DA_DEFAULT_TIMEOUT 60   /* Timeout in seconds */
 364 #endif
 365
 366 #ifndef DA_DEFAULT_RETRY
 367 #define DA_DEFAULT_RETRY        4
 368 #endif
 369
 370 #ifndef DA_DEFAULT_SEND_ORDERED
 371 #define DA_DEFAULT_SEND_ORDERED 1
 372 #endif
 373
 374 static int da_retry_count = DA_DEFAULT_RETRY;
 375 static int da_default_timeout = DA_DEFAULT_TIMEOUT;
 376 static int da_send_ordered = DA_DEFAULT_SEND_ORDERED;
 377 static struct callout dasendorderedtag_ch;
 378
 379 SYSCTL_NODE(_kern_cam, OID_AUTO, da, CTLFLAG_RD, 0,
 380             "CAM Direct Access Disk driver");
 381 SYSCTL_INT(_kern_cam_da, OID_AUTO, retry_count, CTLFLAG_RW,
 382            &da_retry_count, 0, "Normal I/O retry count");
 383 TUNABLE_INT("kern.cam.da.retry_count", &da_retry_count);
 384 SYSCTL_INT(_kern_cam_da, OID_AUTO, default_timeout, CTLFLAG_RW,
 385            &da_default_timeout, 0, "Normal I/O timeout (in seconds)");
 386 TUNABLE_INT("kern.cam.da.default_timeout", &da_default_timeout);
 387 SYSCTL_INT(_kern_cam_da, OID_AUTO, da_send_ordered, CTLFLAG_RW,
 388            &da_send_ordered, 0, "Send Ordered Tags");
 389 TUNABLE_INT("kern.cam.da.da_send_ordered", &da_send_ordered);
 390
 391 /*
 392  * DA_ORDEREDTAG_INTERVAL determines how often, relative
 393  * to the default timeout, we check to see whether an ordered
 394  * tagged transaction is appropriate to prevent simple tag
 395  * starvation.  Since we'd like to ensure that there is at least
 396  * 1/2 of the timeout length left for a starved transaction to
 397  * complete after we've sent an ordered tag, we must poll at least
 398  * four times in every timeout period.  This takes care of the worst
 399  * case where a starved transaction starts during an interval that
 400  * meets the requirement "don't send an ordered tag" test so it takes
 401  * us two intervals to determine that a tag must be sent.
 402  */
 403 #ifndef DA_ORDEREDTAG_INTERVAL
 404 #define DA_ORDEREDTAG_INTERVAL 4
 405 #endif
 406
 407 static struct periph_driver dadriver =
 408 {
 409         dainit, "da",
 410         TAILQ_HEAD_INITIALIZER(dadriver.units), /* generation */ 0
 411 };
 412
 413 PERIPHDRIVER_DECLARE(da, dadriver);
 414
 415 static struct dev_ops da_ops = {
 416         { "da", 0, D_DISK | D_MPSAFE },
 417         .d_open =       daopen,
 418         .d_close =      daclose,
 419         .d_read =       physread,
 420         .d_write =      physwrite,
 421         .d_strategy =   dastrategy,
 422         .d_dump =       dadump,
 423         .d_ioctl =      daioctl
 424 };
 425
 426 static struct extend_array *daperiphs;
 427
 428 MALLOC_DEFINE(M_SCSIDA, "scsi_da", "scsi_da buffers");
 429
 430 static int
 431 daioctl(struct dev_ioctl_args *ap)
 432 {
 433         int unit;
 434         int error = 0;
 435         struct buf *bp;
 436         struct cam_periph *periph;
 437         int byte_count;
 438         struct da_softc * softc;
 439
 440         off_t *del_num = (off_t*)ap->a_data;
 441         off_t bytes_left;
 442         off_t bytes_start;
 443
 444         cdev_t dev = ap->a_head.a_dev;
 445
 446
 447         unit = dkunit(dev);
 448         periph = cam_extend_get(daperiphs, unit);
 449         if (periph == NULL)
 450                 return(ENXIO);
 451         softc = (struct da_softc *)periph->softc;
 452
 453         switch (ap->a_cmd) {
 454         case IOCTLTRIM:
 455         {
 456
 457                 bytes_left = del_num[1];
 458                 bytes_start = del_num[0];
 459
 460                 /* TRIM occurs on 512-byte sectors. */
 461                 KKASSERT((bytes_left % 512) == 0);
 462                 KKASSERT((bytes_start% 512) == 0);
 463
 464
 465                 /* Break TRIM up into int-sized commands because of b_bcount */
 466                 while(bytes_left) {
 467
 468                         /*
 469                          * Rather than than squezing out more blocks in b_bcount
 470                          * and having to break up the TRIM request in da_start(),
 471                          * we ensure we can always TRIM this many bytes with one
 472                          * TRIM command (this happens if the device only
 473                          * supports one TRIM block).
 474                          *
 475                          * With min TRIM blksize of 1, TRIM command free
 476                          * 4194240 blks(64*65535): each LBA range can address
 477                          * 65535 blks and there 64 such ranges in a 512-byte
 478                          * block. And, 4194240 * 512 = 0x7FFF8000
 479                          *
 480                          */
 481                         byte_count = MIN(bytes_left,0x7FFF8000);
 482                         bp = getnewbuf(0,0,0,1);
 483
 484                         bp->b_cmd = BUF_CMD_FREEBLKS;
 485                         bp->b_bio1.bio_offset = bytes_start;
 486                         bp->b_bcount = byte_count;
 487                         bp->b_bio1.bio_flags |= BIO_SYNC;
 488                         bp->b_bio1.bio_done = biodone_sync;
 489
 490                         dev_dstrategy(ap->a_head.a_dev, &bp->b_bio1);
 491
 492                         if (biowait(&bp->b_bio1, "TRIM")) {
 493                                 kprintf("Error:%d\n", bp->b_error);
 494                                 return(bp->b_error ? bp->b_error : EIO);
 495                         }
 496                         brelse(bp);
 497                         bytes_left -= byte_count;
 498                         bytes_start += byte_count;
 499                 }
 500                 break;
 501         }
 502         default:
 503                 return(EINVAL);
 504         }
 505
 506         return(error);
 507 }
 508
 509 static int
 510 daopen(struct dev_open_args *ap)
 511 {
 512         cdev_t dev = ap->a_head.a_dev;
 513         struct cam_periph *periph;
 514         struct da_softc *softc;
 515         struct disk_info info;
 516         int unit;
 517         int error;
 518
 519         unit = dkunit(dev);
 520         periph = cam_extend_get(daperiphs, unit);
 521         if (periph == NULL) {
 522                 return (ENXIO);
 523         }
 524
 525         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
 526                 return(ENXIO);
 527         }
 528
 529         cam_periph_lock(periph);
 530         if ((error = cam_periph_hold(periph, PCATCH)) != 0) {
 531                 cam_periph_unlock(periph);
 532                 cam_periph_release(periph);
 533                 return (error);
 534         }
 535
 536         unit = periph->unit_number;
 537         softc = (struct da_softc *)periph->softc;
 538
 539         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 540             ("daopen: dev=%s (unit %d)\n", devtoname(dev),
 541              unit));
 542
 543         if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
 544                 /* Invalidate our pack information. */
 545                 disk_invalidate(&softc->disk);
 546                 softc->flags &= ~DA_FLAG_PACK_INVALID;
 547         }
 548
 549         error = dacheckmedia(periph);
 550         softc->flags |= DA_FLAG_OPEN;
 551
 552         if (error == 0) {
 553                 struct ccb_getdev cgd;
 554
 555                 /* Build disk information structure */
 556                 bzero(&info, sizeof(info));
 557                 info.d_type = DTYPE_SCSI;
 558
 559                 /*
 560                  * Grab the inquiry data to get the vendor and product names.
 561                  * Put them in the typename and packname for the label.
 562                  */
 563                 xpt_setup_ccb(&cgd.ccb_h, periph->path, /*priority*/ 1);
 564                 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
 565                 xpt_action((union ccb *)&cgd);
 566
 567                 /*
 568                  * Check to see whether or not the blocksize is set yet.
 569                  * If it isn't, set it and then clear the blocksize
 570                  * unavailable flag for the device statistics.
 571                  */
 572                 if ((softc->device_stats.flags & DEVSTAT_BS_UNAVAILABLE) != 0){
 573                         softc->device_stats.block_size = softc->params.secsize;
 574                         softc->device_stats.flags &= ~DEVSTAT_BS_UNAVAILABLE;
 575                 }
 576         }
 577
 578         if (error == 0) {
 579                 if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0 &&
 580                     (softc->quirks & DA_Q_NO_PREVENT) == 0)
 581                         daprevent(periph, PR_PREVENT);
 582         } else {
 583                 softc->flags &= ~DA_FLAG_OPEN;
 584                 cam_periph_release(periph);
 585         }
 586         cam_periph_unhold(periph, 1);
 587         return (error);
 588 }
 589
 590 static int
 591 daclose(struct dev_close_args *ap)
 592 {
 593         cdev_t dev = ap->a_head.a_dev;
 594         struct  cam_periph *periph;
 595         struct  da_softc *softc;
 596         int     unit;
 597         int     error;
 598
 599         unit = dkunit(dev);
 600         periph = cam_extend_get(daperiphs, unit);
 601         if (periph == NULL)
 602                 return (ENXIO);
 603
 604         cam_periph_lock(periph);
 605         if ((error = cam_periph_hold(periph, 0)) != 0) {
 606                 cam_periph_unlock(periph);
 607                 cam_periph_release(periph);
 608                 return (error);
 609         }
 610
 611         softc = (struct da_softc *)periph->softc;
 612
 613         if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
 614                 union   ccb *ccb;
 615
 616                 ccb = cam_periph_getccb(periph, /*priority*/1);
 617
 618                 scsi_synchronize_cache(&ccb->csio,
 619                                        /*retries*/1,
 620                                        /*cbfcnp*/dadone,
 621                                        MSG_SIMPLE_Q_TAG,
 622                                        /*begin_lba*/0,/* Cover the whole disk */
 623                                        /*lb_count*/0,
 624                                        SSD_FULL_SIZE,
 625                                        5 * 60 * 1000);
 626
 627                 cam_periph_runccb(ccb, /*error_routine*/NULL, /*cam_flags*/0,
 628                                   /*sense_flags*/SF_RETRY_UA,
 629                                   &softc->device_stats);
 630
 631                 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 632                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) ==
 633                              CAM_SCSI_STATUS_ERROR) {
 634                                 int asc, ascq;
 635                                 int sense_key, error_code;
 636
 637                                 scsi_extract_sense(&ccb->csio.sense_data,
 638                                                    &error_code,
 639                                                    &sense_key,
 640                                                    &asc, &ascq);
 641                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
 642                                         scsi_sense_print(&ccb->csio);
 643                         } else {
 644                                 xpt_print(periph->path, "Synchronize cache "
 645                                     "failed, status == 0x%x, scsi status == "
 646                                     "0x%x\n", ccb->csio.ccb_h.status,
 647                                     ccb->csio.scsi_status);
 648                         }
 649                 }
 650
 651                 if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 652                         cam_release_devq(ccb->ccb_h.path,
 653                                          /*relsim_flags*/0,
 654                                          /*reduction*/0,
 655                                          /*timeout*/0,
 656                                          /*getcount_only*/0);
 657
 658                 xpt_release_ccb(ccb);
 659
 660         }
 661
 662         if ((softc->flags & DA_FLAG_PACK_REMOVABLE) != 0) {
 663                 if ((softc->quirks & DA_Q_NO_PREVENT) == 0)
 664                         daprevent(periph, PR_ALLOW);
 665                 /*
 666                  * If we've got removeable media, mark the blocksize as
 667                  * unavailable, since it could change when new media is
 668                  * inserted.
 669                  */
 670                 softc->device_stats.flags |= DEVSTAT_BS_UNAVAILABLE;
 671         }
 672
 673         /*
 674          * Don't compound any ref counting software bugs with more.
 675          */
 676         if (softc->flags & DA_FLAG_OPEN) {
 677                 softc->flags &= ~DA_FLAG_OPEN;
 678                 cam_periph_release(periph);
 679         } else {
 680                 xpt_print(periph->path,
 681                           "daclose() called on an already closed device!\n");
 682         }
 683         cam_periph_unhold(periph, 1);
 684         return (0);
 685 }
 686
 687 /*
 688  * Actually translate the requested transfer into one the physical driver
 689  * can understand.  The transfer is described by a buf and will include
 690  * only one physical transfer.
 691  */
 692 static int
 693 dastrategy(struct dev_strategy_args *ap)
 694 {
 695         cdev_t dev = ap->a_head.a_dev;
 696         struct bio *bio = ap->a_bio;
 697         struct buf *bp = bio->bio_buf;
 698         struct cam_periph *periph;
 699         struct da_softc *softc;
 700         u_int  unit;
 701         u_int  part;
 702
 703         unit = dkunit(dev);
 704         part = dkpart(dev);
 705         periph = cam_extend_get(daperiphs, unit);
 706         if (periph == NULL) {
 707                 bp->b_error = ENXIO;
 708                 goto bad;
 709         }
 710         softc = (struct da_softc *)periph->softc;
 711
 712         cam_periph_lock(periph);
 713
 714 #if 0
 715         /*
 716          * check it's not too big a transfer for our adapter
 717          */
 718         scsi_minphys(bp, &sd_switch);
 719 #endif
 720
 721         /*
 722          * Mask interrupts so that the pack cannot be invalidated until
 723          * after we are in the queue.  Otherwise, we might not properly
 724          * clean up one of the buffers.
 725          */
 726
 727         /*
 728          * If the device has been made invalid, error out
 729          */
 730         if ((softc->flags & DA_FLAG_PACK_INVALID)) {
 731                 cam_periph_unlock(periph);
 732                 bp->b_error = ENXIO;
 733                 goto bad;
 734         }
 735
 736         /*
 737          * Place it in the queue of disk activities for this disk
 738          */
 739         if (bp->b_cmd == BUF_CMD_WRITE || bp->b_cmd == BUF_CMD_FLUSH)
 740                 bioqdisksort(&softc->bio_queue_wr, bio);
 741         else if (bp->b_cmd == BUF_CMD_FREEBLKS)
 742                 bioqdisksort(&softc->bio_queue_trim, bio);
 743         else
 744                 bioqdisksort(&softc->bio_queue_rd, bio);
 745
 746         /*
 747          * Schedule ourselves for performing the work.
 748          */
 749         xpt_schedule(periph, /* XXX priority */1);
 750         cam_periph_unlock(periph);
 751
 752         return(0);
 753 bad:
 754         bp->b_flags |= B_ERROR;
 755
 756         /*
 757          * Correctly set the buf to indicate a completed xfer
 758          */
 759         bp->b_resid = bp->b_bcount;
 760         biodone(bio);
 761         return(0);
 762 }
 763
 764 static int
 765 dadump(struct dev_dump_args *ap)
 766 {
 767         cdev_t dev = ap->a_head.a_dev;
 768         struct      cam_periph *periph;
 769         struct      da_softc *softc;
 770         u_int       unit;
 771         u_int32_t   secsize;
 772         struct      ccb_scsiio csio;
 773
 774         unit = dkunit(dev);
 775         periph = cam_extend_get(daperiphs, unit);
 776         if (periph == NULL)
 777                 return (ENXIO);
 778
 779         softc = (struct da_softc *)periph->softc;
 780         cam_periph_lock(periph);
 781         secsize = softc->params.secsize; /* XXX: or ap->a_secsize? */
 782
 783         if ((softc->flags & DA_FLAG_PACK_INVALID) != 0) {
 784                 cam_periph_unlock(periph);
 785                 return (ENXIO);
 786         }
 787
 788         /*
 789          * because length == 0 means we are supposed to flush cache, we only
 790          * try to write something if length > 0.
 791          */
 792         if (ap->a_length > 0) {
 793                 xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
 794                 csio.ccb_h.flags |= CAM_POLLED;
 795                 csio.ccb_h.ccb_state = DA_CCB_DUMP;
 796                 scsi_read_write(&csio,
 797                                 /*retries*/1,
 798                                 dadone,
 799                                 MSG_ORDERED_Q_TAG,
 800                                 /*read*/FALSE,
 801                                 /*byte2*/0,
 802                                 /*minimum_cmd_size*/ softc->minimum_cmd_size,
 803                                 ap->a_offset / secsize,
 804                                 ap->a_length / secsize,
 805                                 /*data_ptr*/(u_int8_t *) ap->a_virtual,
 806                                 /*dxfer_len*/ap->a_length,
 807                                 /*sense_len*/SSD_FULL_SIZE,
 808                                 DA_DEFAULT_TIMEOUT * 1000);
 809                 xpt_polled_action((union ccb *)&csio);
 810
 811                 if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 812                         kprintf("Aborting dump due to I/O error.\n");
 813                         if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
 814                              CAM_SCSI_STATUS_ERROR)
 815                                 scsi_sense_print(&csio);
 816                         else
 817                                 kprintf("status == 0x%x, scsi status == 0x%x\n",
 818                                        csio.ccb_h.status, csio.scsi_status);
 819                         return(EIO);
 820                 }
 821                 cam_periph_unlock(periph);
 822                 return 0;
 823         }
 824
 825         /*
 826          * Sync the disk cache contents to the physical media.
 827          */
 828         if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) {
 829
 830                 xpt_setup_ccb(&csio.ccb_h, periph->path, /*priority*/1);
 831                 csio.ccb_h.ccb_state = DA_CCB_DUMP;
 832                 scsi_synchronize_cache(&csio,
 833                                        /*retries*/1,
 834                                        /*cbfcnp*/dadone,
 835                                        MSG_SIMPLE_Q_TAG,
 836                                        /*begin_lba*/0,/* Cover the whole disk */
 837                                        /*lb_count*/0,
 838                                        SSD_FULL_SIZE,
 839                                        5 * 60 * 1000);
 840                 xpt_polled_action((union ccb *)&csio);
 841
 842                 if ((csio.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 843                         if ((csio.ccb_h.status & CAM_STATUS_MASK) ==
 844                              CAM_SCSI_STATUS_ERROR) {
 845                                 int asc, ascq;
 846                                 int sense_key, error_code;
 847
 848                                 scsi_extract_sense(&csio.sense_data,
 849                                                    &error_code,
 850                                                    &sense_key,
 851                                                    &asc, &ascq);
 852                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
 853                                         scsi_sense_print(&csio);
 854                         } else {
 855                                 xpt_print(periph->path, "Synchronize cache "
 856                                     "failed, status == 0x%x, scsi status == "
 857                                     "0x%x\n", csio.ccb_h.status,
 858                                     csio.scsi_status);
 859                         }
 860                 }
 861         }
 862         cam_periph_unlock(periph);
 863         return (0);
 864 }
 865
 866 static void
 867 dainit(void)
 868 {
 869         cam_status status;
 870
 871         /*
 872          * Create our extend array for storing the devices we attach to.
 873          */
 874         daperiphs = cam_extend_new();
 875         if (daperiphs == NULL) {
 876                 kprintf("da: Failed to alloc extend array!\n");
 877                 return;
 878         }
 879
 880         callout_init(&dasendorderedtag_ch);
 881
 882         /*
 883          * Install a global async callback.  This callback will
 884          * receive async callbacks like "new device found".
 885          */
 886         status = xpt_register_async(AC_FOUND_DEVICE, daasync, NULL, NULL);
 887
 888         if (status != CAM_REQ_CMP) {
 889                 kprintf("da: Failed to attach master async callback "
 890                        "due to status 0x%x!\n", status);
 891         } else if (da_send_ordered) {
 892
 893                 /* Register our shutdown event handler */
 894                 if ((EVENTHANDLER_REGISTER(shutdown_post_sync, dashutdown,
 895                                            NULL, SHUTDOWN_PRI_DEFAULT)) == NULL)
 896                     kprintf("dainit: shutdown event registration failed!\n");
 897         }
 898 }
 899
 900 static void
 901 daoninvalidate(struct cam_periph *periph)
 902 {
 903         struct da_softc *softc;
 904
 905         softc = (struct da_softc *)periph->softc;
 906
 907         /*
 908          * De-register any async callbacks.
 909          */
 910         xpt_register_async(0, daasync, periph, periph->path);
 911
 912         softc->flags |= DA_FLAG_PACK_INVALID;
 913
 914         /*
 915          * Return all queued I/O with ENXIO.
 916          * XXX Handle any transactions queued to the card
 917          *     with XPT_ABORT_CCB.
 918          */
 919         daflushbioq(&softc->bio_queue_trim, ENXIO);
 920         daflushbioq(&softc->bio_queue_wr, ENXIO);
 921         daflushbioq(&softc->bio_queue_rd, ENXIO);
 922         xpt_print(periph->path, "lost device\n");
 923 }
 924
 925 static void
 926 daflushbioq(struct bio_queue_head *bioq, int error)
 927 {
 928         struct bio *q_bio;
 929         struct buf *q_bp;
 930
 931         while ((q_bio = bioq_first(bioq)) != NULL){
 932                 bioq_remove(bioq, q_bio);
 933                 q_bp = q_bio->bio_buf;
 934                 q_bp->b_resid = q_bp->b_bcount;
 935                 q_bp->b_error = error;
 936                 q_bp->b_flags |= B_ERROR;
 937                 biodone(q_bio);
 938         }
 939 }
 940
 941 static void
 942 dacleanup(struct cam_periph *periph)
 943 {
 944         struct da_softc *softc;
 945
 946         softc = (struct da_softc *)periph->softc;
 947
 948         devstat_remove_entry(&softc->device_stats);
 949         cam_extend_release(daperiphs, periph->unit_number);
 950         xpt_print(periph->path, "removing device entry\n");
 951         /*
 952          * If we can't free the sysctl tree, oh well...
 953          */
 954         if ((softc->flags & DA_FLAG_SCTX_INIT) != 0
 955             && sysctl_ctx_free(&softc->sysctl_ctx) != 0) {
 956                 xpt_print(periph->path, "can't remove sysctl context\n");
 957         }
 958         periph->softc = NULL;
 959         if (softc->disk.d_rawdev) {
 960                 cam_periph_unlock(periph);
 961                 disk_destroy(&softc->disk);
 962                 cam_periph_lock(periph);
 963         }
 964
 965         callout_stop(&softc->sendordered_c);
 966         kfree(softc, M_DEVBUF);
 967 }
 968
 969 static void
 970 daasync(void *callback_arg, u_int32_t code,
 971         struct cam_path *path, void *arg)
 972 {
 973         struct cam_periph *periph;
 974
 975         periph = (struct cam_periph *)callback_arg;
 976
 977         switch (code) {
 978         case AC_FOUND_DEVICE:
 979         {
 980                 struct ccb_getdev *cgd;
 981                 struct cam_sim *sim;
 982                 cam_status status;
 983
 984                 cgd = (struct ccb_getdev *)arg;
 985                 if (cgd == NULL)
 986                         break;
 987
 988                 if (SID_TYPE(&cgd->inq_data) != T_DIRECT
 989                     && SID_TYPE(&cgd->inq_data) != T_RBC
 990                     && SID_TYPE(&cgd->inq_data) != T_OPTICAL)
 991                         break;
 992
 993                 /*
 994                  * Don't complain if a valid peripheral is already attached.
 995                  */
 996                 periph = cam_periph_find(cgd->ccb_h.path, "da");
 997                 if (periph && (periph->flags & CAM_PERIPH_INVALID) == 0)
 998                         break;
 999
1000                 /*
1001                  * Allocate a peripheral instance for
1002                  * this device and start the probe
1003                  * process.
1004                  */
1005                 sim = xpt_path_sim(cgd->ccb_h.path);
1006                 status = cam_periph_alloc(daregister, daoninvalidate,
1007                                           dacleanup, dastart,
1008                                           "da", CAM_PERIPH_BIO,
1009                                           cgd->ccb_h.path, daasync,
1010                                           AC_FOUND_DEVICE, cgd);
1011
1012                 if (status != CAM_REQ_CMP && status != CAM_REQ_INPROG) {
1013                         kprintf("daasync: Unable to attach to new device "
1014                                 "due to status 0x%x\n", status);
1015                 }
1016                 break;
1017         }
1018         case AC_SENT_BDR:
1019         case AC_BUS_RESET:
1020         {
1021                 struct da_softc *softc;
1022                 struct ccb_hdr *ccbh;
1023
1024                 softc = (struct da_softc *)periph->softc;
1025                 /*
1026                  * Don't fail on the expected unit attention
1027                  * that will occur.
1028                  */
1029                 softc->flags |= DA_FLAG_RETRY_UA;
1030                 LIST_FOREACH(ccbh, &softc->pending_ccbs, periph_links.le)
1031                         ccbh->ccb_state |= DA_CCB_RETRY_UA;
1032                 /* FALLTHROUGH*/
1033         }
1034         default:
1035                 cam_periph_async(periph, code, path, arg);
1036                 break;
1037         }
1038 }
1039
1040 static void
1041 dasysctlinit(void *context, int pending)
1042 {
1043         struct cam_periph *periph;
1044         struct da_softc *softc;
1045         char tmpstr[80], tmpstr2[80];
1046
1047         get_mplock();
1048         periph = (struct cam_periph *)context;
1049         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
1050                 rel_mplock();
1051                 return;
1052         }
1053
1054         softc = (struct da_softc *)periph->softc;
1055         ksnprintf(tmpstr, sizeof(tmpstr), "CAM DA unit %d", periph->unit_number);
1056         ksnprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number);
1057
1058         sysctl_ctx_init(&softc->sysctl_ctx);
1059         softc->flags |= DA_FLAG_SCTX_INIT;
1060         softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
1061                 SYSCTL_STATIC_CHILDREN(_kern_cam_da), OID_AUTO, tmpstr2,
1062                 CTLFLAG_RD, 0, tmpstr);
1063         if (softc->sysctl_tree == NULL) {
1064                 kprintf("dasysctlinit: unable to allocate sysctl tree\n");
1065                 cam_periph_release(periph);
1066                 rel_mplock();
1067                 return;
1068         }
1069
1070         /*
1071          * Now register the sysctl handler, so the user can the value on
1072          * the fly.
1073          */
1074         SYSCTL_ADD_PROC(&softc->sysctl_ctx,SYSCTL_CHILDREN(softc->sysctl_tree),
1075                 OID_AUTO, "minimum_cmd_size", CTLTYPE_INT | CTLFLAG_RW,
1076                 &softc->minimum_cmd_size, 0, dacmdsizesysctl, "I",
1077                 "Minimum CDB size");
1078
1079         /* Only create the option if the device supports TRIM */
1080         if (softc->disk.d_info.d_trimflag) {
1081                 SYSCTL_ADD_INT(&softc->sysctl_ctx,
1082                     SYSCTL_CHILDREN(softc->sysctl_tree),
1083                     OID_AUTO,
1084                     "trim_enabled",
1085                     CTLFLAG_RW,
1086                     &softc->trim_enabled,
1087                     0,
1088                     "Enable TRIM for this device (SSD))");
1089         }
1090
1091         cam_periph_release(periph);
1092         rel_mplock();
1093 }
1094
1095 static int
1096 dacmdsizesysctl(SYSCTL_HANDLER_ARGS)
1097 {
1098         int error, value;
1099
1100         value = *(int *)arg1;
1101
1102         error = sysctl_handle_int(oidp, &value, 0, req);
1103
1104         if ((error != 0)
1105          || (req->newptr == NULL))
1106                 return (error);
1107
1108         /*
1109          * Acceptable values here are 6, 10 or 12, or 16.
1110          */
1111         if (value < 6)
1112                 value = 6;
1113         else if ((value > 6)
1114               && (value <= 10))
1115                 value = 10;
1116         else if ((value > 10)
1117               && (value <= 12))
1118                 value = 12;
1119         else if (value > 12)
1120                 value = 16;
1121
1122         *(int *)arg1 = value;
1123
1124         return (0);
1125 }
1126
1127 static cam_status
1128 daregister(struct cam_periph *periph, void *arg)
1129 {
1130         struct da_softc *softc;
1131         struct ccb_pathinq cpi;
1132         struct ccb_getdev *cgd;
1133         char tmpstr[80];
1134         caddr_t match;
1135
1136         cgd = (struct ccb_getdev *)arg;
1137         if (periph == NULL) {
1138                 kprintf("daregister: periph was NULL!!\n");
1139                 return(CAM_REQ_CMP_ERR);
1140         }
1141
1142         if (cgd == NULL) {
1143                 kprintf("daregister: no getdev CCB, can't register device\n");
1144                 return(CAM_REQ_CMP_ERR);
1145         }
1146
1147         softc = kmalloc(sizeof(*softc), M_DEVBUF, M_INTWAIT | M_ZERO);
1148         LIST_INIT(&softc->pending_ccbs);
1149         softc->state = DA_STATE_PROBE;
1150         bioq_init(&softc->bio_queue_trim);
1151         bioq_init(&softc->bio_queue_rd);
1152         bioq_init(&softc->bio_queue_wr);
1153         if (SID_IS_REMOVABLE(&cgd->inq_data))
1154                 softc->flags |= DA_FLAG_PACK_REMOVABLE;
1155         if ((cgd->inq_data.flags & SID_CmdQue) != 0)
1156                 softc->flags |= DA_FLAG_TAGGED_QUEUING;
1157
1158         /* Used to get TRIM status from AHCI driver */
1159         if (cgd->inq_data.vendor_specific1[0] == 1) {
1160                 /*
1161                  * max number of lba ranges an SSD can handle in a single
1162                  * TRIM command. vendor_specific1[1] is the num of 512-byte
1163                  * blocks the SSD reports that can be passed in a TRIM cmd.
1164                  */
1165                 softc->trim_max_ranges =
1166                    min(cgd->inq_data.vendor_specific1[1] * 64, TRIM_MAX_RANGES);
1167         }
1168
1169         periph->softc = softc;
1170
1171         cam_extend_set(daperiphs, periph->unit_number, periph);
1172
1173         /*
1174          * See if this device has any quirks.
1175          */
1176         match = cam_quirkmatch((caddr_t)&cgd->inq_data,
1177                                (caddr_t)da_quirk_table,
1178                                NELEM(da_quirk_table),
1179                                sizeof(*da_quirk_table), scsi_inquiry_match);
1180
1181         if (match != NULL)
1182                 softc->quirks = ((struct da_quirk_entry *)match)->quirks;
1183         else
1184                 softc->quirks = DA_Q_NONE;
1185
1186         /*
1187          * Unconditionally disable the synchronize cache command for
1188          * usb attachments.  It's just impossible to determine if the
1189          * device supports it or not and if it doesn't the port can
1190          * brick.
1191          */
1192         if (strncmp(periph->sim->sim_name, "umass", 4) == 0) {
1193                 softc->quirks |= DA_Q_NO_SYNC_CACHE;
1194         }
1195
1196         TASK_INIT(&softc->sysctl_task, 0, dasysctlinit, periph);
1197
1198         /* Check if the SIM does not want 6 byte commands */
1199         bzero(&cpi, sizeof(cpi));
1200         xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
1201         cpi.ccb_h.func_code = XPT_PATH_INQ;
1202         xpt_action((union ccb *)&cpi);
1203         if (cpi.ccb_h.status == CAM_REQ_CMP && (cpi.hba_misc & PIM_NO_6_BYTE))
1204                 softc->quirks |= DA_Q_NO_6_BYTE;
1205
1206         /*
1207          * RBC devices don't have to support READ(6), only READ(10).
1208          */
1209         if (softc->quirks & DA_Q_NO_6_BYTE || SID_TYPE(&cgd->inq_data) == T_RBC)
1210                 softc->minimum_cmd_size = 10;
1211         else
1212                 softc->minimum_cmd_size = 6;
1213
1214         /*
1215          * Load the user's default, if any.
1216          */
1217         ksnprintf(tmpstr, sizeof(tmpstr), "kern.cam.da.%d.minimum_cmd_size",
1218                  periph->unit_number);
1219         TUNABLE_INT_FETCH(tmpstr, &softc->minimum_cmd_size);
1220
1221         /*
1222          * 6, 10, 12, and 16 are the currently permissible values.
1223          */
1224         if (softc->minimum_cmd_size < 6)
1225                 softc->minimum_cmd_size = 6;
1226         else if ((softc->minimum_cmd_size > 6)
1227               && (softc->minimum_cmd_size <= 10))
1228                 softc->minimum_cmd_size = 10;
1229         else if ((softc->minimum_cmd_size > 10)
1230               && (softc->minimum_cmd_size <= 12))
1231                 softc->minimum_cmd_size = 12;
1232         else if (softc->minimum_cmd_size > 12)
1233                 softc->minimum_cmd_size = 16;
1234
1235         /*
1236          * The DA driver supports a blocksize, but
1237          * we don't know the blocksize until we do
1238          * a read capacity.  So, set a flag to
1239          * indicate that the blocksize is
1240          * unavailable right now.  We'll clear the
1241          * flag as soon as we've done a read capacity.
1242          */
1243         devstat_add_entry(&softc->device_stats, "da",
1244                           periph->unit_number, 0,
1245                           DEVSTAT_BS_UNAVAILABLE,
1246                           SID_TYPE(&cgd->inq_data) | DEVSTAT_TYPE_IF_SCSI,
1247                           DEVSTAT_PRIORITY_DISK);
1248
1249         /*
1250          * Register this media as a disk
1251          */
1252         CAM_SIM_UNLOCK(periph->sim);
1253         disk_create(periph->unit_number, &softc->disk, &da_ops);
1254         if (cpi.maxio == 0 || cpi.maxio > MAXPHYS)
1255                 softc->disk.d_rawdev->si_iosize_max = MAXPHYS;
1256         else
1257                 softc->disk.d_rawdev->si_iosize_max = cpi.maxio;
1258         CAM_SIM_LOCK(periph->sim);
1259
1260         /*
1261          * Add async callbacks for bus reset and
1262          * bus device reset calls.  I don't bother
1263          * checking if this fails as, in most cases,
1264          * the system will function just fine without
1265          * them and the only alternative would be to
1266          * not attach the device on failure.
1267          */
1268         xpt_register_async(AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE,
1269                            daasync, periph, periph->path);
1270
1271         /*
1272          * Take an exclusive refcount on the periph while dastart is called
1273          * to finish the probe.  The reference will be dropped in dadone at
1274          * the end of probe.
1275          */
1276         cam_periph_hold(periph, 0);
1277         xpt_schedule(periph, /*priority*/5);
1278
1279         /*
1280          * Schedule a periodic event to occasionally send an
1281          * ordered tag to a device.
1282          */
1283         callout_init(&softc->sendordered_c);
1284         callout_reset(&softc->sendordered_c,
1285             (DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL,
1286             dasendorderedtag, softc);
1287
1288
1289
1290         return(CAM_REQ_CMP);
1291 }
1292
1293 static void
1294 dastart(struct cam_periph *periph, union ccb *start_ccb)
1295 {
1296         struct da_softc *softc;
1297
1298         softc = (struct da_softc *)periph->softc;
1299
1300         switch (softc->state) {
1301         case DA_STATE_NORMAL:
1302         {
1303                 /* Pull a buffer from the queue and get going on it */
1304                 struct bio *bio;
1305                 struct bio *bio_rd;
1306                 struct bio *bio_wr;
1307                 struct buf *bp;
1308                 u_int8_t tag_code;
1309                 int limit;
1310
1311                 /*
1312                  * See if there is a buf with work for us to do..
1313                  */
1314                 bio_rd = bioq_first(&softc->bio_queue_rd);
1315                 bio_wr = bioq_first(&softc->bio_queue_wr);
1316
1317                 if (periph->immediate_priority <= periph->pinfo.priority) {
1318                         CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE,
1319                                         ("queuing for immediate ccb\n"));
1320                         start_ccb->ccb_h.ccb_state = DA_CCB_WAITING;
1321                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
1322                                           periph_links.sle);
1323                         periph->immediate_priority = CAM_PRIORITY_NONE;
1324                         wakeup(&periph->ccb_list);
1325                         if (bio_rd || bio_wr) {
1326                                 /*
1327                                  * Have more work to do, so ensure we stay
1328                                  * scheduled
1329                                  */
1330                                 xpt_schedule(periph, /* XXX priority */1);
1331                         }
1332                         break;
1333                 }
1334
1335                 /* Run the trim command if not already running */
1336                 if (!softc->trim_running &&
1337                    (bio = bioq_first(&softc->bio_queue_trim)) != NULL) {
1338                         struct trim_request *req = &softc->trim_req;
1339                         struct bio *bio1;
1340                         int bps = 0, ranges = 0;
1341
1342                         softc->trim_running = 1;
1343                         bzero(req, sizeof(*req));
1344                         bio1 = bio;
1345                         while (1) {
1346                                 uint64_t lba;
1347                                 int count;
1348
1349                                 bp = bio1->bio_buf;
1350                                 count = bp->b_bcount / softc->params.secsize;
1351                                 lba = bio1->bio_offset/softc->params.secsize;
1352
1353                                 kprintf("trim lba:%llu boff:%llu count:%d\n",
1354                                     (unsigned long long) lba,
1355                                     (unsigned long long) bio1->bio_offset,
1356                                     count);
1357
1358                                 bioq_remove(&softc->bio_queue_trim, bio1);
1359                                 while (count > 0) {
1360                                         int c = min(count, 0xffff);
1361                                         int off = ranges * 8;
1362
1363                                         req->data[off + 0] = lba & 0xff;
1364                                         req->data[off + 1] = (lba >> 8) & 0xff;
1365                                         req->data[off + 2] = (lba >> 16) & 0xff;
1366                                         req->data[off + 3] = (lba >> 24) & 0xff;
1367                                         req->data[off + 4] = (lba >> 32) & 0xff;
1368                                         req->data[off + 5] = (lba >> 40) & 0xff;
1369                                         req->data[off + 6] = c & 0xff;
1370                                         req->data[off + 7] = (c >> 8) & 0xff;
1371                                         lba += c;
1372                                         count -= c;
1373                                         ranges++;
1374                                 }
1375
1376                                 /* Try to merge multiple TRIM requests */
1377                                 req->bios[bps++] = bio1;
1378                                 bio1 = bioq_first(&softc->bio_queue_trim);
1379                                 if (bio1 == NULL ||
1380                                     bio1->bio_buf->b_bcount / softc->params.secsize >
1381                                     (softc->trim_max_ranges - ranges) * 0xffff)
1382                                         break;
1383                         }
1384
1385
1386                         cam_fill_csio(&start_ccb->csio,
1387                             1/*retries*/,
1388                             dadone,
1389                             CAM_DIR_OUT,
1390                             MSG_SIMPLE_Q_TAG,
1391                             req->data,
1392                             ((ranges +63)/64)*512,
1393                             SSD_FULL_SIZE,
1394                             sizeof(struct scsi_rw_6),
1395                             da_default_timeout*2);
1396
1397                         start_ccb->ccb_h.ccb_state = DA_CCB_TRIM;
1398                         LIST_INSERT_HEAD(&softc->pending_ccbs,
1399                             &start_ccb->ccb_h, periph_links.le);
1400                         start_ccb->csio.ccb_h.func_code = XPT_TRIM;
1401                         start_ccb->ccb_h.ccb_bio = bio;
1402                         devstat_start_transaction(&softc->device_stats);
1403                         xpt_action(start_ccb);
1404                         xpt_schedule(periph, 1);
1405                         break;
1406                 }
1407
1408                 /*
1409                  * Select a read or write buffer to queue.  Limit the number
1410                  * of tags dedicated to reading or writing, giving reads
1411                  * precedence.
1412                  *
1413                  * Writes to modern hard drives go into the HDs cache and
1414                  * return completion nearly instantly.  That is until the
1415                  * cache becomes full.  When the HDs cache becomes full
1416                  * write commands will begin to stall.  If all available
1417                  * tags are taken up by writes which saturate the drive
1418                  * reads will become tag-starved.
1419                  *
1420                  * A similar situation can occur with reads.  With many
1421                  * parallel readers all tags can be taken up by reads
1422                  * and prevent any writes from draining, even if the HD's
1423                  * cache is not full.
1424                  */
1425                 limit = periph->sim->max_tagged_dev_openings * 2 / 3 + 1;
1426 #if 0
1427                 /* DEBUGGING */
1428                 static int savets;
1429                 static long savets2;
1430                 if (1 || time_second != savets2 || (ticks != savets && (softc->outstanding_cmds_rd || softc->outstanding_cmds_wr))) {
1431                         kprintf("%d %d (%d)\n",
1432                                 softc->outstanding_cmds_rd,
1433                                 softc->outstanding_cmds_wr,
1434                                 limit);
1435                         savets = ticks;
1436                         savets2 = time_second;
1437                 }
1438 #endif
1439                 if (bio_rd && softc->outstanding_cmds_rd < limit) {
1440                         bio = bio_rd;
1441                         bioq_remove(&softc->bio_queue_rd, bio);
1442                 } else if (bio_wr && softc->outstanding_cmds_wr < limit) {
1443                         bio = bio_wr;
1444                         bioq_remove(&softc->bio_queue_wr, bio);
1445                 } else {
1446                         if (bio_rd)
1447                                 softc->flags |= DA_FLAG_RD_LIMIT;
1448                         if (bio_wr)
1449                                 softc->flags |= DA_FLAG_WR_LIMIT;
1450                         xpt_release_ccb(start_ccb);
1451                         break;
1452                 }
1453
1454                 /*
1455                  * We can queue new work.
1456                  */
1457                 bp = bio->bio_buf;
1458
1459                 devstat_start_transaction(&softc->device_stats);
1460
1461                 if ((bp->b_flags & B_ORDERED) != 0 ||
1462                     (softc->flags & DA_FLAG_NEED_OTAG) != 0) {
1463                         softc->flags &= ~DA_FLAG_NEED_OTAG;
1464                         softc->ordered_tag_count++;
1465                         tag_code = MSG_ORDERED_Q_TAG;
1466                 } else {
1467                         tag_code = MSG_SIMPLE_Q_TAG;
1468                 }
1469
1470                 switch(bp->b_cmd) {
1471                 case BUF_CMD_READ:
1472                 case BUF_CMD_WRITE:
1473                         /*
1474                          * Block read/write op
1475                          */
1476                         KKASSERT(bio->bio_offset % softc->params.secsize == 0);
1477
1478                         scsi_read_write(
1479                                 &start_ccb->csio,
1480                                 da_retry_count,         /* retries */
1481                                 dadone,
1482                                 tag_code,
1483                                 (bp->b_cmd == BUF_CMD_READ),
1484                                 0,                      /* byte2 */
1485                                 softc->minimum_cmd_size,
1486                                 bio->bio_offset / softc->params.secsize,
1487                                 bp->b_bcount / softc->params.secsize,
1488                                 bp->b_data,
1489                                 bp->b_bcount,
1490                                 SSD_FULL_SIZE,          /* sense_len */
1491                                 da_default_timeout * 1000
1492                         );
1493                         break;
1494                 case BUF_CMD_FLUSH:
1495                         /*
1496                          * Silently complete a flush request if the device
1497                          * cannot handle it.
1498                          */
1499                         if (softc->quirks & DA_Q_NO_SYNC_CACHE) {
1500                                 xpt_release_ccb(start_ccb);
1501                                 start_ccb = NULL;
1502                                 devstat_end_transaction_buf(
1503                                         &softc->device_stats, bp);
1504                                 biodone(bio);
1505                         } else {
1506                                 scsi_synchronize_cache(
1507                                         &start_ccb->csio,
1508                                         1,              /* retries */
1509                                         dadone,         /* cbfcnp */
1510                                         MSG_SIMPLE_Q_TAG,
1511                                         0,              /* lba */
1512                                         0,              /* count (whole disk) */
1513                                         SSD_FULL_SIZE,
1514                                         da_default_timeout*1000 /* timeout */
1515                                 );
1516                         }
1517                         break;
1518                 case BUF_CMD_FREEBLKS:
1519                         if (softc->disk.d_info.d_trimflag & DA_FLAG_CAN_TRIM){
1520                                 start_ccb->csio.ccb_h.func_code = XPT_TRIM;
1521                                 break;
1522                         }
1523                 default:
1524                         xpt_release_ccb(start_ccb);
1525                         start_ccb = NULL;
1526                         panic("dastart: unrecognized bio cmd %d", bp->b_cmd);
1527                         break; /* NOT REACHED */
1528                 }
1529
1530                 /*
1531                  * Block out any asyncronous callbacks
1532                  * while we touch the pending ccb list.
1533                  */
1534                 if (start_ccb) {
1535                         start_ccb->ccb_h.ccb_state = DA_CCB_BUFFER_IO;
1536                         LIST_INSERT_HEAD(&softc->pending_ccbs,
1537                                          &start_ccb->ccb_h, periph_links.le);
1538                         if (bp->b_cmd == BUF_CMD_WRITE ||
1539                             bp->b_cmd == BUF_CMD_FLUSH) {
1540                                 ++softc->outstanding_cmds_wr;
1541                         } else {
1542                                 ++softc->outstanding_cmds_rd;
1543                         }
1544
1545                         /* We expect a unit attention from this device */
1546                         if ((softc->flags & DA_FLAG_RETRY_UA) != 0) {
1547                                 start_ccb->ccb_h.ccb_state |= DA_CCB_RETRY_UA;
1548                                 softc->flags &= ~DA_FLAG_RETRY_UA;
1549                         }
1550
1551                         start_ccb->ccb_h.ccb_bio = bio;
1552                         xpt_action(start_ccb);
1553                 }
1554
1555                 /*
1556                  * Be sure we stay scheduled if we have more work to do.
1557                  */
1558                 if (bioq_first(&softc->bio_queue_rd) ||
1559                     bioq_first(&softc->bio_queue_wr)) {
1560                         xpt_schedule(periph, 1);
1561                 }
1562                 break;
1563         }
1564         case DA_STATE_PROBE:
1565         {
1566                 struct ccb_scsiio *csio;
1567                 struct scsi_read_capacity_data *rcap;
1568
1569                 rcap = kmalloc(sizeof(*rcap), M_SCSIDA, M_INTWAIT | M_ZERO);
1570                 csio = &start_ccb->csio;
1571                 scsi_read_capacity(csio,
1572                                    /*retries*/4,
1573                                    dadone,
1574                                    MSG_SIMPLE_Q_TAG,
1575                                    rcap,
1576                                    SSD_FULL_SIZE,
1577                                    /*timeout*/5000);
1578                 start_ccb->ccb_h.ccb_bio = NULL;
1579                 start_ccb->ccb_h.ccb_state = DA_CCB_PROBE;
1580                 xpt_action(start_ccb);
1581                 break;
1582         }
1583         case DA_STATE_PROBE2:
1584         {
1585                 struct ccb_scsiio *csio;
1586                 struct scsi_read_capacity_data_16 *rcaplong;
1587
1588                 rcaplong = kmalloc(sizeof(*rcaplong), M_SCSIDA,
1589                                    M_INTWAIT | M_ZERO);
1590                 csio = &start_ccb->csio;
1591                 scsi_read_capacity_16(csio,
1592                                     /*retries*/ 4,
1593                                     /*cbfcnp*/ dadone,
1594                                     /*tag_action*/ MSG_SIMPLE_Q_TAG,
1595                                     /*lba*/ 0,
1596                                     /*reladr*/ 0,
1597                                     /*pmi*/ 0,
1598                                     rcaplong,
1599                                     /*sense_len*/ SSD_FULL_SIZE,
1600                                     /*timeout*/ 60000);
1601                 start_ccb->ccb_h.ccb_bio = NULL;
1602                 start_ccb->ccb_h.ccb_state = DA_CCB_PROBE2;
1603                 xpt_action(start_ccb);
1604                 break;
1605         }
1606         }
1607 }
1608
1609 static int
1610 cmd6workaround(union ccb *ccb)
1611 {
1612         struct scsi_rw_6 cmd6;
1613         struct scsi_rw_10 *cmd10;
1614         struct da_softc *softc;
1615         u_int8_t *cdb;
1616         int frozen;
1617
1618         cdb = ccb->csio.cdb_io.cdb_bytes;
1619
1620         /* Translation only possible if CDB is an array and cmd is R/W6 */
1621         if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0 ||
1622             (*cdb != READ_6 && *cdb != WRITE_6))
1623                 return 0;
1624
1625         xpt_print(ccb->ccb_h.path, "READ(6)/WRITE(6) not supported, "
1626             "increasing minimum_cmd_size to 10.\n");
1627         softc = (struct da_softc *)xpt_path_periph(ccb->ccb_h.path)->softc;
1628         softc->minimum_cmd_size = 10;
1629
1630         bcopy(cdb, &cmd6, sizeof(struct scsi_rw_6));
1631         cmd10 = (struct scsi_rw_10 *)cdb;
1632         cmd10->opcode = (cmd6.opcode == READ_6) ? READ_10 : WRITE_10;
1633         cmd10->byte2 = 0;
1634         scsi_ulto4b(scsi_3btoul(cmd6.addr), cmd10->addr);
1635         cmd10->reserved = 0;
1636         scsi_ulto2b(cmd6.length, cmd10->length);
1637         cmd10->control = cmd6.control;
1638         ccb->csio.cdb_len = sizeof(*cmd10);
1639
1640         /* Requeue request, unfreezing queue if necessary */
1641         frozen = (ccb->ccb_h.status & CAM_DEV_QFRZN) != 0;
1642         ccb->ccb_h.status = CAM_REQUEUE_REQ;
1643         xpt_action(ccb);
1644         if (frozen) {
1645                 cam_release_devq(ccb->ccb_h.path,
1646                                  /*relsim_flags*/0,
1647                                  /*reduction*/0,
1648                                  /*timeout*/0,
1649                                  /*getcount_only*/0);
1650         }
1651         return (ERESTART);
1652 }
1653
1654 static void
1655 dadone(struct cam_periph *periph, union ccb *done_ccb)
1656 {
1657         struct da_softc *softc;
1658         struct ccb_scsiio *csio;
1659         struct disk_info info;
1660
1661         softc = (struct da_softc *)periph->softc;
1662         csio = &done_ccb->csio;
1663         switch (csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) {
1664         case DA_CCB_BUFFER_IO:
1665         case DA_CCB_TRIM:
1666         {
1667                 struct buf *bp;
1668                 struct bio *bio;
1669                 int mustsched = 0;
1670
1671                 bio = (struct bio *)done_ccb->ccb_h.ccb_bio;
1672                 bp = bio->bio_buf;
1673                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1674                         int error;
1675                         int sf;
1676
1677                         if ((csio->ccb_h.ccb_state & DA_CCB_RETRY_UA) != 0)
1678                                 sf = SF_RETRY_UA;
1679                         else
1680                                 sf = 0;
1681
1682                         error = daerror(done_ccb, CAM_RETRY_SELTO, sf);
1683                         if (error == ERESTART) {
1684                                 /*
1685                                  * A retry was scheuled, so
1686                                  * just return.
1687                                  */
1688                                 return;
1689                         }
1690                         if (error != 0) {
1691                                 if (error == ENXIO) {
1692                                         /*
1693                                          * Catastrophic error.  Mark our pack as
1694                                          * invalid.
1695                                          */
1696                                         /*
1697                                          * XXX See if this is really a media
1698                                          * XXX change first?
1699                                          */
1700                                         xpt_print(periph->path,
1701                                             "Invalidating pack\n");
1702                                         softc->flags |= DA_FLAG_PACK_INVALID;
1703                                 }
1704
1705                                 /*
1706                                  * Return all queued write I/O's with EIO
1707                                  * so the client can retry these I/Os in the
1708                                  * proper order should it attempt to recover.
1709                                  *
1710                                  * Leave read I/O's alone.
1711                                  */
1712                                 daflushbioq(&softc->bio_queue_wr, EIO);
1713                                 bp->b_error = error;
1714                                 bp->b_resid = bp->b_bcount;
1715                                 bp->b_flags |= B_ERROR;
1716                         } else {
1717                                 bp->b_resid = csio->resid;
1718                                 bp->b_error = 0;
1719                                 if (bp->b_resid != 0)
1720                                         bp->b_flags |= B_ERROR;
1721                         }
1722                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1723                                 cam_release_devq(done_ccb->ccb_h.path,
1724                                                  /*relsim_flags*/0,
1725                                                  /*reduction*/0,
1726                                                  /*timeout*/0,
1727                                                  /*getcount_only*/0);
1728                 } else {
1729                         if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1730                                 panic("REQ_CMP with QFRZN");
1731                         bp->b_resid = csio->resid;
1732                         if (csio->resid > 0)
1733                                 bp->b_flags |= B_ERROR;
1734                 }
1735
1736                 /*
1737                  * Block out any asyncronous callbacks
1738                  * while we touch the pending ccb list.
1739                  */
1740                 LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
1741                 if (bp->b_cmd == BUF_CMD_WRITE || bp->b_cmd == BUF_CMD_FLUSH) {
1742                         --softc->outstanding_cmds_wr;
1743                         if (softc->flags & DA_FLAG_WR_LIMIT) {
1744                                 softc->flags &= ~DA_FLAG_WR_LIMIT;
1745                                 mustsched = 1;
1746                         }
1747                 } else {
1748                         --softc->outstanding_cmds_rd;
1749                         if (softc->flags & DA_FLAG_RD_LIMIT) {
1750                                 softc->flags &= ~DA_FLAG_RD_LIMIT;
1751                                 mustsched = 1;
1752                         }
1753                 }
1754                 if (softc->outstanding_cmds_rd +
1755                     softc->outstanding_cmds_wr == 0) {
1756                         softc->flags |= DA_FLAG_WENT_IDLE;
1757                 }
1758
1759                 devstat_end_transaction_buf(&softc->device_stats, bp);
1760                 if ((csio->ccb_h.ccb_state & DA_CCB_TYPE_MASK) ==
1761                     DA_CCB_TRIM) {
1762                         struct trim_request *req =
1763                             (struct trim_request *) csio->data_ptr;
1764                         int i;
1765
1766                         for (i = 1; i < softc->trim_max_ranges &&
1767                             req->bios[i]; i++) {
1768                                 struct bio *bp1 = req->bios[i];
1769
1770                                 bp1->bio_buf->b_resid = bp->b_resid;
1771                                 bp1->bio_buf->b_error = bp->b_error;
1772                                 if (bp->b_flags & B_ERROR)
1773                                         bp1->bio_buf->b_flags |= B_ERROR;
1774                                 biodone(bp1);
1775                         }
1776                         softc->trim_running = 0;
1777                         biodone(bio);
1778                         xpt_schedule(periph,1);
1779                 } else
1780                         biodone(bio);
1781
1782
1783                 if (mustsched)
1784                         xpt_schedule(periph, /*priority*/1);
1785
1786                 break;
1787         }
1788         case DA_CCB_PROBE:
1789         case DA_CCB_PROBE2:
1790         {
1791                 struct     scsi_read_capacity_data *rdcap;
1792                 struct     scsi_read_capacity_data_16 *rcaplong;
1793                 char       announce_buf[80];
1794
1795                 rdcap = NULL;
1796                 rcaplong = NULL;
1797                 if (softc->state == DA_STATE_PROBE)
1798                         rdcap =(struct scsi_read_capacity_data *)csio->data_ptr;
1799                 else
1800                         rcaplong = (struct scsi_read_capacity_data_16 *)
1801                                     csio->data_ptr;
1802
1803                 bzero(&info, sizeof(info));
1804                 info.d_type = DTYPE_SCSI;
1805                 info.d_serialno = xpt_path_serialno(periph->path);
1806
1807                 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
1808                         struct disk_params *dp;
1809                         uint32_t block_size;
1810                         uint64_t maxsector;
1811
1812                         if (softc->state == DA_STATE_PROBE) {
1813                                 block_size = scsi_4btoul(rdcap->length);
1814                                 maxsector = scsi_4btoul(rdcap->addr);
1815
1816                                 /*
1817                                  * According to SBC-2, if the standard 10
1818                                  * byte READ CAPACITY command returns 2^32,
1819                                  * we should issue the 16 byte version of
1820                                  * the command, since the device in question
1821                                  * has more sectors than can be represented
1822                                  * with the short version of the command.
1823                                  */
1824                                 if (maxsector == 0xffffffff) {
1825                                         softc->state = DA_STATE_PROBE2;
1826                                         kfree(rdcap, M_SCSIDA);
1827                                         xpt_release_ccb(done_ccb);
1828                                         xpt_schedule(periph, /*priority*/5);
1829                                         return;
1830                                 }
1831                         } else {
1832                                 block_size = scsi_4btoul(rcaplong->length);
1833                                 maxsector = scsi_8btou64(rcaplong->addr);
1834                         }
1835                         dasetgeom(periph, block_size, maxsector);
1836                         dp = &softc->params;
1837                         ksnprintf(announce_buf, sizeof(announce_buf),
1838                                 "%juMB (%ju %u byte sectors: %dH %dS/T %dC)",
1839                                 (uintmax_t) (((uintmax_t)dp->secsize *
1840                                 dp->sectors) / (1024*1024)),
1841                                 (uintmax_t)dp->sectors,
1842                                 dp->secsize, dp->heads, dp->secs_per_track,
1843                                 dp->cylinders);
1844
1845                         CAM_SIM_UNLOCK(periph->sim);
1846                         info.d_media_blksize = softc->params.secsize;
1847                         info.d_media_blocks = softc->params.sectors;
1848                         info.d_media_size = 0;
1849                         info.d_secpertrack = softc->params.secs_per_track;
1850                         info.d_nheads = softc->params.heads;
1851                         info.d_ncylinders = softc->params.cylinders;
1852                         info.d_secpercyl = softc->params.heads *
1853                                                 softc->params.secs_per_track;
1854                         info.d_serialno = xpt_path_serialno(periph->path);
1855                         disk_setdiskinfo(&softc->disk, &info);
1856                         CAM_SIM_LOCK(periph->sim);
1857                 } else {
1858                         int     error;
1859
1860                         announce_buf[0] = '\0';
1861
1862                         /*
1863                          * Retry any UNIT ATTENTION type errors.  They
1864                          * are expected at boot.
1865                          */
1866                         error = daerror(done_ccb, CAM_RETRY_SELTO,
1867                                         SF_RETRY_UA|SF_NO_PRINT);
1868                         if (error == ERESTART) {
1869                                 /*
1870                                  * A retry was scheuled, so
1871                                  * just return.
1872                                  */
1873                                 return;
1874                         } else if (error != 0) {
1875                                 struct scsi_sense_data *sense;
1876                                 int asc, ascq;
1877                                 int sense_key, error_code;
1878                                 int have_sense;
1879                                 cam_status status;
1880                                 struct ccb_getdev cgd;
1881
1882                                 /* Don't wedge this device's queue */
1883                                 status = done_ccb->ccb_h.status;
1884                                 if ((status & CAM_DEV_QFRZN) != 0)
1885                                         cam_release_devq(done_ccb->ccb_h.path,
1886                                                          /*relsim_flags*/0,
1887                                                          /*reduction*/0,
1888                                                          /*timeout*/0,
1889                                                          /*getcount_only*/0);
1890
1891
1892                                 xpt_setup_ccb(&cgd.ccb_h,
1893                                               done_ccb->ccb_h.path,
1894                                               /* priority */ 1);
1895                                 cgd.ccb_h.func_code = XPT_GDEV_TYPE;
1896                                 xpt_action((union ccb *)&cgd);
1897
1898                                 if (((csio->ccb_h.flags & CAM_SENSE_PHYS) != 0)
1899                                  || ((csio->ccb_h.flags & CAM_SENSE_PTR) != 0)
1900                                  || ((status & CAM_AUTOSNS_VALID) == 0))
1901                                         have_sense = FALSE;
1902                                 else
1903                                         have_sense = TRUE;
1904
1905                                 if (have_sense) {
1906                                         sense = &csio->sense_data;
1907                                         scsi_extract_sense(sense, &error_code,
1908                                                            &sense_key,
1909                                                            &asc, &ascq);
1910                                 }
1911                                 /*
1912                                  * Attach to anything that claims to be a
1913                                  * direct access or optical disk device,
1914                                  * as long as it doesn't return a "Logical
1915                                  * unit not supported" (0x25) error.
1916                                  */
1917                                 if ((have_sense) && (asc != 0x25)
1918                                  && (error_code == SSD_CURRENT_ERROR)) {
1919                                         const char *sense_key_desc;
1920                                         const char *asc_desc;
1921
1922                                         scsi_sense_desc(sense_key, asc, ascq,
1923                                                         &cgd.inq_data,
1924                                                         &sense_key_desc,
1925                                                         &asc_desc);
1926                                         ksnprintf(announce_buf,
1927                                             sizeof(announce_buf),
1928                                                 "Attempt to query device "
1929                                                 "size failed: %s, %s",
1930                                                 sense_key_desc,
1931                                                 asc_desc);
1932                                         info.d_media_blksize = 512;
1933                                         disk_setdiskinfo(&softc->disk, &info);
1934                                 } else {
1935                                         if (have_sense)
1936                                                 scsi_sense_print(
1937                                                         &done_ccb->csio);
1938                                         else {
1939                                                 xpt_print(periph->path,
1940                                                     "got CAM status %#x\n",
1941                                                     done_ccb->ccb_h.status);
1942                                         }
1943
1944                                         xpt_print(periph->path, "fatal error, "
1945                                             "failed to attach to device\n");
1946
1947                                         /*
1948                                          * Free up resources.
1949                                          */
1950                                         cam_periph_invalidate(periph);
1951                                 }
1952                         }
1953                 }
1954                 kfree(csio->data_ptr, M_SCSIDA);
1955                 if (announce_buf[0] != '\0') {
1956                         xpt_announce_periph(periph, announce_buf);
1957                         /*
1958                          * Create our sysctl variables, now that we know
1959                          * we have successfully attached.
1960                          */
1961                         taskqueue_enqueue(taskqueue_thread[mycpuid],
1962                             &softc->sysctl_task);
1963                 }
1964
1965                 if (softc->trim_max_ranges) {
1966                         softc->disk.d_info.d_trimflag |= DA_FLAG_CAN_TRIM;
1967                         kprintf("%s%d: supports TRIM\n",
1968                             periph->periph_name,
1969                             periph->unit_number);
1970                 }
1971                 softc->state = DA_STATE_NORMAL;
1972                 /*
1973                  * Since our peripheral may be invalidated by an error
1974                  * above or an external event, we must release our CCB
1975                  * before releasing the probe lock on the peripheral.
1976                  * The peripheral will only go away once the last lock
1977                  * is removed, and we need it around for the CCB release
1978                  * operation.
1979                  */
1980                 xpt_release_ccb(done_ccb);
1981                 cam_periph_unhold(periph, 0);
1982                 return;
1983         }
1984         case DA_CCB_WAITING:
1985         {
1986                 /* Caller will release the CCB */
1987                 wakeup(&done_ccb->ccb_h.cbfcnp);
1988                 return;
1989         }
1990         case DA_CCB_DUMP:
1991                 /* No-op.  We're polling */
1992                 return;
1993         default:
1994                 break;
1995         }
1996         xpt_release_ccb(done_ccb);
1997 }
1998
1999 static int
2000 daerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
2001 {
2002         struct da_softc   *softc;
2003         struct cam_periph *periph;
2004         int error;
2005
2006         periph = xpt_path_periph(ccb->ccb_h.path);
2007         softc = (struct da_softc *)periph->softc;
2008
2009         /*
2010          * Automatically detect devices that do not support
2011          * READ(6)/WRITE(6) and upgrade to using 10 byte cdbs.
2012          */
2013         error = 0;
2014         if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INVALID) {
2015                 error = cmd6workaround(ccb);
2016         } else if (((ccb->ccb_h.status & CAM_STATUS_MASK) ==
2017                    CAM_SCSI_STATUS_ERROR)
2018          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)
2019          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
2020          && ((ccb->ccb_h.flags & CAM_SENSE_PHYS) == 0)
2021          && ((ccb->ccb_h.flags & CAM_SENSE_PTR) == 0)) {
2022                 int sense_key, error_code, asc, ascq;
2023
2024                 scsi_extract_sense(&ccb->csio.sense_data,
2025                                    &error_code, &sense_key, &asc, &ascq);
2026                 if (sense_key == SSD_KEY_ILLEGAL_REQUEST)
2027                         error = cmd6workaround(ccb);
2028         }
2029         if (error == ERESTART)
2030                 return (ERESTART);
2031
2032         /*
2033          * XXX
2034          * Until we have a better way of doing pack validation,
2035          * don't treat UAs as errors.
2036          */
2037         sense_flags |= SF_RETRY_UA;
2038         return(cam_periph_error(ccb, cam_flags, sense_flags,
2039                                 &softc->saved_ccb));
2040 }
2041
2042 static void
2043 daprevent(struct cam_periph *periph, int action)
2044 {
2045         struct  da_softc *softc;
2046         union   ccb *ccb;
2047         int     error;
2048
2049         softc = (struct da_softc *)periph->softc;
2050
2051         if (((action == PR_ALLOW)
2052           && (softc->flags & DA_FLAG_PACK_LOCKED) == 0)
2053          || ((action == PR_PREVENT)
2054           && (softc->flags & DA_FLAG_PACK_LOCKED) != 0)) {
2055                 return;
2056         }
2057
2058         ccb = cam_periph_getccb(periph, /*priority*/1);
2059
2060         scsi_prevent(&ccb->csio,
2061                      /*retries*/1,
2062                      /*cbcfp*/dadone,
2063                      MSG_SIMPLE_Q_TAG,
2064                      action,
2065                      SSD_FULL_SIZE,
2066                      5000);
2067
2068         error = cam_periph_runccb(ccb, /*error_routine*/NULL, CAM_RETRY_SELTO,
2069                                   SF_RETRY_UA, &softc->device_stats);
2070
2071         if (error == 0) {
2072                 if (action == PR_ALLOW)
2073                         softc->flags &= ~DA_FLAG_PACK_LOCKED;
2074                 else
2075                         softc->flags |= DA_FLAG_PACK_LOCKED;
2076         }
2077
2078         xpt_release_ccb(ccb);
2079 }
2080
2081 /*
2082  * Check media on open, e.g. card reader devices which had no initial media.
2083  */
2084 static int
2085 dacheckmedia(struct cam_periph *periph)
2086 {
2087         struct disk_params *dp;
2088         struct da_softc *softc;
2089         struct disk_info info;
2090         int error;
2091
2092         softc = (struct da_softc *)periph->softc;
2093         dp = &softc->params;
2094
2095         error = dagetcapacity(periph);
2096
2097         /*
2098          * Only reprobe on initial open and if the media is removable.
2099          *
2100          * NOTE: If we setdiskinfo() it will take the device probe
2101          *       a bit of time to probe the slices and partitions,
2102          *       and mess up booting.  So avoid if nothing has changed.
2103          *       XXX
2104          */
2105         if (softc->flags & DA_FLAG_OPEN)
2106                 return (error);
2107         if ((softc->flags & DA_FLAG_PACK_REMOVABLE) == 0)
2108                 return (error);
2109
2110         bzero(&info, sizeof(info));
2111         info.d_type = DTYPE_SCSI;
2112         info.d_serialno = xpt_path_serialno(periph->path);
2113
2114         if (error == 0) {
2115                 CAM_SIM_UNLOCK(periph->sim);
2116                 info.d_media_blksize = softc->params.secsize;
2117                 info.d_media_blocks = softc->params.sectors;
2118                 info.d_media_size = 0;
2119                 info.d_secpertrack = softc->params.secs_per_track;
2120                 info.d_nheads = softc->params.heads;
2121                 info.d_ncylinders = softc->params.cylinders;
2122                 info.d_secpercyl = softc->params.heads *
2123                                         softc->params.secs_per_track;
2124                 info.d_serialno = xpt_path_serialno(periph->path);
2125                 if (info.d_media_blocks != softc->disk.d_info.d_media_blocks) {
2126                         kprintf("%s%d: open removable media: "
2127                                 "%juMB (%ju %u byte sectors: %dH %dS/T %dC)\n",
2128                                 periph->periph_name, periph->unit_number,
2129                                 (uintmax_t)(((uintmax_t)dp->secsize *
2130                                              dp->sectors) / (1024*1024)),
2131                                 (uintmax_t)dp->sectors, dp->secsize,
2132                                 dp->heads, dp->secs_per_track, dp->cylinders);
2133                         disk_setdiskinfo(&softc->disk, &info);
2134                 }
2135                 CAM_SIM_LOCK(periph->sim);
2136         } else {
2137                 kprintf("%s%d: open removable media: no media present\n",
2138                         periph->periph_name, periph->unit_number);
2139                 info.d_media_blksize = 512;
2140                 disk_setdiskinfo(&softc->disk, &info);
2141         }
2142         return (error);
2143 }
2144
2145 static int
2146 dagetcapacity(struct cam_periph *periph)
2147 {
2148         struct da_softc *softc;
2149         union ccb *ccb;
2150         struct scsi_read_capacity_data *rcap;
2151         struct scsi_read_capacity_data_16 *rcaplong;
2152         uint32_t block_len;
2153         uint64_t maxsector;
2154         int error;
2155
2156         softc = (struct da_softc *)periph->softc;
2157         block_len = 0;
2158         maxsector = 0;
2159         error = 0;
2160
2161         /* Do a read capacity */
2162         rcap = (struct scsi_read_capacity_data *)kmalloc(sizeof(*rcaplong),
2163                                                          M_SCSIDA, M_INTWAIT);
2164
2165         ccb = cam_periph_getccb(periph, /*priority*/1);
2166         scsi_read_capacity(&ccb->csio,
2167                            /*retries*/4,
2168                            /*cbfncp*/dadone,
2169                            MSG_SIMPLE_Q_TAG,
2170                            rcap,
2171                            SSD_FULL_SIZE,
2172                            /*timeout*/60000);
2173         ccb->ccb_h.ccb_bio = NULL;
2174
2175         error = cam_periph_runccb(ccb, daerror,
2176                                   /*cam_flags*/CAM_RETRY_SELTO,
2177                                   /*sense_flags*/SF_RETRY_UA,
2178                                   &softc->device_stats);
2179
2180         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
2181                 cam_release_devq(ccb->ccb_h.path,
2182                                  /*relsim_flags*/0,
2183                                  /*reduction*/0,
2184                                  /*timeout*/0,
2185                                  /*getcount_only*/0);
2186
2187         if (error == 0) {
2188                 block_len = scsi_4btoul(rcap->length);
2189                 maxsector = scsi_4btoul(rcap->addr);
2190
2191                 if (maxsector != 0xffffffff)
2192                         goto done;
2193         } else
2194                 goto done;
2195
2196         rcaplong = (struct scsi_read_capacity_data_16 *)rcap;
2197
2198         scsi_read_capacity_16(&ccb->csio,
2199                               /*retries*/ 4,
2200                               /*cbfcnp*/ dadone,
2201                               /*tag_action*/ MSG_SIMPLE_Q_TAG,
2202                               /*lba*/ 0,
2203                               /*reladr*/ 0,
2204                               /*pmi*/ 0,
2205                               rcaplong,
2206                               /*sense_len*/ SSD_FULL_SIZE,
2207                               /*timeout*/ 60000);
2208         ccb->ccb_h.ccb_bio = NULL;
2209
2210         error = cam_periph_runccb(ccb, daerror,
2211                                   /*cam_flags*/CAM_RETRY_SELTO,
2212                                   /*sense_flags*/SF_RETRY_UA,
2213                                   &softc->device_stats);
2214
2215         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
2216                 cam_release_devq(ccb->ccb_h.path,
2217                                  /*relsim_flags*/0,
2218                                  /*reduction*/0,
2219                                  /*timeout*/0,
2220                                  /*getcount_only*/0);
2221
2222         if (error == 0) {
2223                 block_len = scsi_4btoul(rcaplong->length);
2224                 maxsector = scsi_8btou64(rcaplong->addr);
2225         }
2226
2227 done:
2228
2229         if (error == 0)
2230                 dasetgeom(periph, block_len, maxsector);
2231
2232         xpt_release_ccb(ccb);
2233
2234         kfree(rcap, M_SCSIDA);
2235
2236         return (error);
2237 }
2238
2239 static void
2240 dasetgeom(struct cam_periph *periph, uint32_t block_len, uint64_t maxsector)
2241 {
2242         struct ccb_calc_geometry ccg;
2243         struct da_softc *softc;
2244         struct disk_params *dp;
2245
2246         softc = (struct da_softc *)periph->softc;
2247
2248         dp = &softc->params;
2249         dp->secsize = block_len;
2250         dp->sectors = maxsector + 1;
2251         /*
2252          * Have the controller provide us with a geometry
2253          * for this disk.  The only time the geometry
2254          * matters is when we boot and the controller
2255          * is the only one knowledgeable enough to come
2256          * up with something that will make this a bootable
2257          * device.
2258          */
2259         xpt_setup_ccb(&ccg.ccb_h, periph->path, /*priority*/1);
2260         ccg.ccb_h.func_code = XPT_CALC_GEOMETRY;
2261         ccg.block_size = dp->secsize;
2262         ccg.volume_size = dp->sectors;
2263         ccg.heads = 0;
2264         ccg.secs_per_track = 0;
2265         ccg.cylinders = 0;
2266         xpt_action((union ccb*)&ccg);
2267         if ((ccg.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
2268                 /*
2269                  * We don't know what went wrong here- but just pick
2270                  * a geometry so we don't have nasty things like divide
2271                  * by zero.
2272                  */
2273                 dp->heads = 255;
2274                 dp->secs_per_track = 255;
2275                 dp->cylinders = dp->sectors / (255 * 255);
2276                 if (dp->cylinders == 0) {
2277                         dp->cylinders = 1;
2278                 }
2279         } else {
2280                 dp->heads = ccg.heads;
2281                 dp->secs_per_track = ccg.secs_per_track;
2282                 dp->cylinders = ccg.cylinders;
2283         }
2284 }
2285
2286 static void
2287 dasendorderedtag(void *arg)
2288 {
2289         struct da_softc *softc = arg;
2290
2291         if (da_send_ordered) {
2292                 if ((softc->ordered_tag_count == 0)
2293                  && ((softc->flags & DA_FLAG_WENT_IDLE) == 0)) {
2294                         softc->flags |= DA_FLAG_NEED_OTAG;
2295                 }
2296                 if (softc->outstanding_cmds_rd || softc->outstanding_cmds_wr)
2297                         softc->flags &= ~DA_FLAG_WENT_IDLE;
2298
2299                 softc->ordered_tag_count = 0;
2300         }
2301         /* Queue us up again */
2302         callout_reset(&softc->sendordered_c,
2303             (DA_DEFAULT_TIMEOUT * hz) / DA_ORDEREDTAG_INTERVAL,
2304             dasendorderedtag, softc);
2305 }
2306
2307 /*
2308  * Step through all DA peripheral drivers, and if the device is still open,
2309  * sync the disk cache to physical media.
2310  */
2311 static void
2312 dashutdown(void * arg, int howto)
2313 {
2314         struct cam_periph *periph;
2315         struct da_softc *softc;
2316
2317         TAILQ_FOREACH(periph, &dadriver.units, unit_links) {
2318                 union ccb ccb;
2319
2320                 cam_periph_lock(periph);
2321                 softc = (struct da_softc *)periph->softc;
2322
2323                 /*
2324                  * We only sync the cache if the drive is still open, and
2325                  * if the drive is capable of it..
2326                  */
2327                 if (((softc->flags & DA_FLAG_OPEN) == 0)
2328                  || (softc->quirks & DA_Q_NO_SYNC_CACHE)) {
2329                         cam_periph_unlock(periph);
2330                         continue;
2331                 }
2332
2333                 xpt_setup_ccb(&ccb.ccb_h, periph->path, /*priority*/1);
2334
2335                 ccb.ccb_h.ccb_state = DA_CCB_DUMP;
2336                 scsi_synchronize_cache(&ccb.csio,
2337                                        /*retries*/1,
2338                                        /*cbfcnp*/dadone,
2339                                        MSG_SIMPLE_Q_TAG,
2340                                        /*begin_lba*/0, /* whole disk */
2341                                        /*lb_count*/0,
2342                                        SSD_FULL_SIZE,
2343                                        60 * 60 * 1000);
2344
2345                 xpt_polled_action(&ccb);
2346
2347                 if ((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
2348                         if (((ccb.ccb_h.status & CAM_STATUS_MASK) ==
2349                              CAM_SCSI_STATUS_ERROR)
2350                          && (ccb.csio.scsi_status == SCSI_STATUS_CHECK_COND)){
2351                                 int error_code, sense_key, asc, ascq;
2352
2353                                 scsi_extract_sense(&ccb.csio.sense_data,
2354                                                    &error_code, &sense_key,
2355                                                    &asc, &ascq);
2356
2357                                 if (sense_key != SSD_KEY_ILLEGAL_REQUEST)
2358                                         scsi_sense_print(&ccb.csio);
2359                         } else {
2360                                 xpt_print(periph->path, "Synchronize "
2361                                     "cache failed, status == 0x%x, scsi status "
2362                                     "== 0x%x\n", ccb.ccb_h.status,
2363                                     ccb.csio.scsi_status);
2364                         }
2365                 }
2366
2367                 if ((ccb.ccb_h.status & CAM_DEV_QFRZN) != 0)
2368                         cam_release_devq(ccb.ccb_h.path,
2369                                          /*relsim_flags*/0,
2370                                          /*reduction*/0,
2371                                          /*timeout*/0,
2372                                          /*getcount_only*/0);
2373
2374                 cam_periph_unlock(periph);
2375         }
2376 }
2377
2378 #else /* !_KERNEL */
2379
2380 /*
2381  * XXX This is only left out of the kernel build to silence warnings.  If,
2382  * for some reason this function is used in the kernel, the ifdefs should
2383  * be moved so it is included both in the kernel and userland.
2384  */
2385 void
2386 scsi_format_unit(struct ccb_scsiio *csio, u_int32_t retries,
2387                  void (*cbfcnp)(struct cam_periph *, union ccb *),
2388                  u_int8_t tag_action, u_int8_t byte2, u_int16_t ileave,
2389                  u_int8_t *data_ptr, u_int32_t dxfer_len, u_int8_t sense_len,
2390                  u_int32_t timeout)
2391 {
2392         struct scsi_format_unit *scsi_cmd;
2393
2394         scsi_cmd = (struct scsi_format_unit *)&csio->cdb_io.cdb_bytes;
2395         scsi_cmd->opcode = FORMAT_UNIT;
2396         scsi_cmd->byte2 = byte2;
2397         scsi_ulto2b(ileave, scsi_cmd->interleave);
2398
2399         cam_fill_csio(csio,
2400                       retries,
2401                       cbfcnp,
2402                       /*flags*/ (dxfer_len > 0) ? CAM_DIR_OUT : CAM_DIR_NONE,
2403                       tag_action,
2404                       data_ptr,
2405                       dxfer_len,
2406                       sense_len,
2407                       sizeof(*scsi_cmd),
2408                       timeout);
2409 }
2410
2411 #endif /* _KERNEL */