sys/cam/scsi/scsi_xpt.c

   1 /*-
   2  * Implementation of the SCSI Transport
   3  *
   4  * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
   5  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions, and the following disclaimer,
  13  *    without modification, immediately at the beginning of the file.
  14  * 2. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  21  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/param.h>
  34 #include <sys/bus.h>
  35 #include <sys/systm.h>
  36 #include <sys/types.h>
  37 #include <sys/malloc.h>
  38 #include <sys/kernel.h>
  39 #include <sys/time.h>
  40 #include <sys/conf.h>
  41 #include <sys/fcntl.h>
  42 #include <sys/md5.h>
  43 #include <sys/interrupt.h>
  44 #include <sys/sbuf.h>
  45
  46 #include <sys/lock.h>
  47 #include <sys/mutex.h>
  48 #include <sys/sysctl.h>
  49
  50 #ifdef PC98
  51 #include <pc98/pc98/pc98_machdep.h>     /* geometry translation */
  52 #endif
  53
  54 #include <cam/cam.h>
  55 #include <cam/cam_ccb.h>
  56 #include <cam/cam_queue.h>
  57 #include <cam/cam_periph.h>
  58 #include <cam/cam_sim.h>
  59 #include <cam/cam_xpt.h>
  60 #include <cam/cam_xpt_sim.h>
  61 #include <cam/cam_xpt_periph.h>
  62 #include <cam/cam_xpt_internal.h>
  63 #include <cam/cam_debug.h>
  64
  65 #include <cam/scsi/scsi_all.h>
  66 #include <cam/scsi/scsi_message.h>
  67 #include <cam/scsi/scsi_pass.h>
  68 #include <machine/stdarg.h>     /* for xpt_print below */
  69 #include "opt_cam.h"
  70
  71 struct scsi_quirk_entry {
  72         struct scsi_inquiry_pattern inq_pat;
  73         u_int8_t quirks;
  74 #define CAM_QUIRK_NOLUNS        0x01
  75 #define CAM_QUIRK_NOSERIAL      0x02
  76 #define CAM_QUIRK_HILUNS        0x04
  77 #define CAM_QUIRK_NOHILUNS      0x08
  78         u_int mintags;
  79         u_int maxtags;
  80 };
  81 #define SCSI_QUIRK(dev) ((struct scsi_quirk_entry *)((dev)->quirk))
  82
  83 static int cam_srch_hi = 0;
  84 TUNABLE_INT("kern.cam.cam_srch_hi", &cam_srch_hi);
  85 static int sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS);
  86 SYSCTL_PROC(_kern_cam, OID_AUTO, cam_srch_hi, CTLTYPE_INT|CTLFLAG_RW, 0, 0,
  87     sysctl_cam_search_luns, "I",
  88     "allow search above LUN 7 for SCSI3 and greater devices");
  89
  90 #define CAM_SCSI2_MAXLUN        8
  91 /*
  92  * If we're not quirked to search <= the first 8 luns
  93  * and we are either quirked to search above lun 8,
  94  * or we're > SCSI-2 and we've enabled hilun searching,
  95  * or we're > SCSI-2 and the last lun was a success,
  96  * we can look for luns above lun 8.
  97  */
  98 #define CAN_SRCH_HI_SPARSE(dv)                                  \
  99   (((SCSI_QUIRK(dv)->quirks & CAM_QUIRK_NOHILUNS) == 0)         \
 100   && ((SCSI_QUIRK(dv)->quirks & CAM_QUIRK_HILUNS)               \
 101   || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2 && cam_srch_hi)))
 102
 103 #define CAN_SRCH_HI_DENSE(dv)                                   \
 104   (((SCSI_QUIRK(dv)->quirks & CAM_QUIRK_NOHILUNS) == 0)         \
 105   && ((SCSI_QUIRK(dv)->quirks & CAM_QUIRK_HILUNS)               \
 106   || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2)))
 107
 108 static periph_init_t probe_periph_init;
 109
 110 static struct periph_driver probe_driver =
 111 {
 112         probe_periph_init, "probe",
 113         TAILQ_HEAD_INITIALIZER(probe_driver.units)
 114 };
 115
 116 PERIPHDRIVER_DECLARE(probe, probe_driver);
 117
 118 typedef enum {
 119         PROBE_TUR,
 120         PROBE_INQUIRY,  /* this counts as DV0 for Basic Domain Validation */
 121         PROBE_FULL_INQUIRY,
 122         PROBE_MODE_SENSE,
 123         PROBE_SERIAL_NUM_0,
 124         PROBE_SERIAL_NUM_1,
 125         PROBE_TUR_FOR_NEGOTIATION,
 126         PROBE_INQUIRY_BASIC_DV1,
 127         PROBE_INQUIRY_BASIC_DV2,
 128         PROBE_DV_EXIT,
 129         PROBE_INVALID
 130 } probe_action;
 131
 132 static char *probe_action_text[] = {
 133         "PROBE_TUR",
 134         "PROBE_INQUIRY",
 135         "PROBE_FULL_INQUIRY",
 136         "PROBE_MODE_SENSE",
 137         "PROBE_SERIAL_NUM_0",
 138         "PROBE_SERIAL_NUM_1",
 139         "PROBE_TUR_FOR_NEGOTIATION",
 140         "PROBE_INQUIRY_BASIC_DV1",
 141         "PROBE_INQUIRY_BASIC_DV2",
 142         "PROBE_DV_EXIT",
 143         "PROBE_INVALID"
 144 };
 145
 146 #define PROBE_SET_ACTION(softc, newaction)      \
 147 do {                                                                    \
 148         char **text;                                                    \
 149         text = probe_action_text;                                       \
 150         CAM_DEBUG((softc)->periph->path, CAM_DEBUG_INFO,                \
 151             ("Probe %s to %s\n", text[(softc)->action],                 \
 152             text[(newaction)]));                                        \
 153         (softc)->action = (newaction);                                  \
 154 } while(0)
 155
 156 typedef enum {
 157         PROBE_INQUIRY_CKSUM     = 0x01,
 158         PROBE_SERIAL_CKSUM      = 0x02,
 159         PROBE_NO_ANNOUNCE       = 0x04
 160 } probe_flags;
 161
 162 typedef struct {
 163         TAILQ_HEAD(, ccb_hdr) request_ccbs;
 164         probe_action    action;
 165         union ccb       saved_ccb;
 166         probe_flags     flags;
 167         MD5_CTX         context;
 168         u_int8_t        digest[16];
 169         struct cam_periph *periph;
 170 } probe_softc;
 171
 172 static const char quantum[] = "QUANTUM";
 173 static const char sony[] = "SONY";
 174 static const char west_digital[] = "WDIGTL";
 175 static const char samsung[] = "SAMSUNG";
 176 static const char seagate[] = "SEAGATE";
 177 static const char microp[] = "MICROP";
 178
 179 static struct scsi_quirk_entry scsi_quirk_table[] =
 180 {
 181         {
 182                 /* Reports QUEUE FULL for temporary resource shortages */
 183                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" },
 184                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 185         },
 186         {
 187                 /* Reports QUEUE FULL for temporary resource shortages */
 188                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" },
 189                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 190         },
 191         {
 192                 /* Reports QUEUE FULL for temporary resource shortages */
 193                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" },
 194                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 195         },
 196         {
 197                 /* Broken tagged queuing drive */
 198                 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" },
 199                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 200         },
 201         {
 202                 /* Broken tagged queuing drive */
 203                 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" },
 204                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 205         },
 206         {
 207                 /* Broken tagged queuing drive */
 208                 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" },
 209                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 210         },
 211         {
 212                 /*
 213                  * Unfortunately, the Quantum Atlas III has the same
 214                  * problem as the Atlas II drives above.
 215                  * Reported by: "Johan Granlund" <johan@granlund.nu>
 216                  *
 217                  * For future reference, the drive with the problem was:
 218                  * QUANTUM QM39100TD-SW N1B0
 219                  *
 220                  * It's possible that Quantum will fix the problem in later
 221                  * firmware revisions.  If that happens, the quirk entry
 222                  * will need to be made specific to the firmware revisions
 223                  * with the problem.
 224                  *
 225                  */
 226                 /* Reports QUEUE FULL for temporary resource shortages */
 227                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" },
 228                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 229         },
 230         {
 231                 /*
 232                  * 18 Gig Atlas III, same problem as the 9G version.
 233                  * Reported by: Andre Albsmeier
 234                  *              <andre.albsmeier@mchp.siemens.de>
 235                  *
 236                  * For future reference, the drive with the problem was:
 237                  * QUANTUM QM318000TD-S N491
 238                  */
 239                 /* Reports QUEUE FULL for temporary resource shortages */
 240                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" },
 241                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 242         },
 243         {
 244                 /*
 245                  * Broken tagged queuing drive
 246                  * Reported by: Bret Ford <bford@uop.cs.uop.edu>
 247                  *         and: Martin Renters <martin@tdc.on.ca>
 248                  */
 249                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" },
 250                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 251         },
 252                 /*
 253                  * The Seagate Medalist Pro drives have very poor write
 254                  * performance with anything more than 2 tags.
 255                  *
 256                  * Reported by:  Paul van der Zwan <paulz@trantor.xs4all.nl>
 257                  * Drive:  <SEAGATE ST36530N 1444>
 258                  *
 259                  * Reported by:  Jeremy Lea <reg@shale.csir.co.za>
 260                  * Drive:  <SEAGATE ST34520W 1281>
 261                  *
 262                  * No one has actually reported that the 9G version
 263                  * (ST39140*) of the Medalist Pro has the same problem, but
 264                  * we're assuming that it does because the 4G and 6.5G
 265                  * versions of the drive are broken.
 266                  */
 267         {
 268                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"},
 269                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 270         },
 271         {
 272                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"},
 273                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 274         },
 275         {
 276                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"},
 277                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 278         },
 279         {
 280                 /*
 281                  * Slow when tagged queueing is enabled.  Write performance
 282                  * steadily drops off with more and more concurrent
 283                  * transactions.  Best sequential write performance with
 284                  * tagged queueing turned off and write caching turned on.
 285                  *
 286                  * PR:  kern/10398
 287                  * Submitted by:  Hideaki Okada <hokada@isl.melco.co.jp>
 288                  * Drive:  DCAS-34330 w/ "S65A" firmware.
 289                  *
 290                  * The drive with the problem had the "S65A" firmware
 291                  * revision, and has also been reported (by Stephen J.
 292                  * Roznowski <sjr@home.net>) for a drive with the "S61A"
 293                  * firmware revision.
 294                  *
 295                  * Although no one has reported problems with the 2 gig
 296                  * version of the DCAS drive, the assumption is that it
 297                  * has the same problems as the 4 gig version.  Therefore
 298                  * this quirk entries disables tagged queueing for all
 299                  * DCAS drives.
 300                  */
 301                 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" },
 302                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 303         },
 304         {
 305                 /* Broken tagged queuing drive */
 306                 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" },
 307                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 308         },
 309         {
 310                 /* Broken tagged queuing drive */
 311                 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" },
 312                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 313         },
 314         {
 315                 /* This does not support other than LUN 0 */
 316                 { T_DIRECT, SIP_MEDIA_FIXED, "VMware*", "*", "*" },
 317                 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
 318         },
 319         {
 320                 /*
 321                  * Broken tagged queuing drive.
 322                  * Submitted by:
 323                  * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp>
 324                  * in PR kern/9535
 325                  */
 326                 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" },
 327                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 328         },
 329         {
 330                 /*
 331                  * Slow when tagged queueing is enabled. (1.5MB/sec versus
 332                  * 8MB/sec.)
 333                  * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
 334                  * Best performance with these drives is achieved with
 335                  * tagged queueing turned off, and write caching turned on.
 336                  */
 337                 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" },
 338                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 339         },
 340         {
 341                 /*
 342                  * Slow when tagged queueing is enabled. (1.5MB/sec versus
 343                  * 8MB/sec.)
 344                  * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
 345                  * Best performance with these drives is achieved with
 346                  * tagged queueing turned off, and write caching turned on.
 347                  */
 348                 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" },
 349                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 350         },
 351         {
 352                 /*
 353                  * Doesn't handle queue full condition correctly,
 354                  * so we need to limit maxtags to what the device
 355                  * can handle instead of determining this automatically.
 356                  */
 357                 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" },
 358                 /*quirks*/0, /*mintags*/2, /*maxtags*/32
 359         },
 360         {
 361                 /* Really only one LUN */
 362                 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" },
 363                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 364         },
 365         {
 366                 /* I can't believe we need a quirk for DPT volumes. */
 367                 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" },
 368                 CAM_QUIRK_NOLUNS,
 369                 /*mintags*/0, /*maxtags*/255
 370         },
 371         {
 372                 /*
 373                  * Many Sony CDROM drives don't like multi-LUN probing.
 374                  */
 375                 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" },
 376                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 377         },
 378         {
 379                 /*
 380                  * This drive doesn't like multiple LUN probing.
 381                  * Submitted by:  Parag Patel <parag@cgt.com>
 382                  */
 383                 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R   CDU9*", "*" },
 384                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 385         },
 386         {
 387                 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" },
 388                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 389         },
 390         {
 391                 /*
 392                  * The 8200 doesn't like multi-lun probing, and probably
 393                  * don't like serial number requests either.
 394                  */
 395                 {
 396                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
 397                         "EXB-8200*", "*"
 398                 },
 399                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 400         },
 401         {
 402                 /*
 403                  * Let's try the same as above, but for a drive that says
 404                  * it's an IPL-6860 but is actually an EXB 8200.
 405                  */
 406                 {
 407                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
 408                         "IPL-6860*", "*"
 409                 },
 410                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 411         },
 412         {
 413                 /*
 414                  * These Hitachi drives don't like multi-lun probing.
 415                  * The PR submitter has a DK319H, but says that the Linux
 416                  * kernel has a similar work-around for the DK312 and DK314,
 417                  * so all DK31* drives are quirked here.
 418                  * PR:            misc/18793
 419                  * Submitted by:  Paul Haddad <paul@pth.com>
 420                  */
 421                 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" },
 422                 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
 423         },
 424         {
 425                 /*
 426                  * The Hitachi CJ series with J8A8 firmware apparantly has
 427                  * problems with tagged commands.
 428                  * PR: 23536
 429                  * Reported by: amagai@nue.org
 430                  */
 431                 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK32CJ*", "J8A8" },
 432                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 433         },
 434         {
 435                 /*
 436                  * These are the large storage arrays.
 437                  * Submitted by:  William Carrel <william.carrel@infospace.com>
 438                  */
 439                 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "OPEN*", "*" },
 440                 CAM_QUIRK_HILUNS, 2, 1024
 441         },
 442         {
 443                 /*
 444                  * This old revision of the TDC3600 is also SCSI-1, and
 445                  * hangs upon serial number probing.
 446                  */
 447                 {
 448                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 449                         " TDC 3600", "U07:"
 450                 },
 451                 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0
 452         },
 453         {
 454                 /*
 455                  * Would repond to all LUNs if asked for.
 456                  */
 457                 {
 458                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER",
 459                         "CP150", "*"
 460                 },
 461                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 462         },
 463         {
 464                 /*
 465                  * Would repond to all LUNs if asked for.
 466                  */
 467                 {
 468                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
 469                         "96X2*", "*"
 470                 },
 471                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 472         },
 473         {
 474                 /* Submitted by: Matthew Dodd <winter@jurai.net> */
 475                 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" },
 476                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 477         },
 478         {
 479                 /* Submitted by: Matthew Dodd <winter@jurai.net> */
 480                 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" },
 481                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 482         },
 483         {
 484                 /* TeraSolutions special settings for TRC-22 RAID */
 485                 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" },
 486                   /*quirks*/0, /*mintags*/55, /*maxtags*/255
 487         },
 488         {
 489                 /* Veritas Storage Appliance */
 490                 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" },
 491                   CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024
 492         },
 493         {
 494                 /*
 495                  * Would respond to all LUNs.  Device type and removable
 496                  * flag are jumper-selectable.
 497                  */
 498                 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix",
 499                   "Tahiti 1", "*"
 500                 },
 501                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 502         },
 503         {
 504                 /* EasyRAID E5A aka. areca ARC-6010 */
 505                 { T_DIRECT, SIP_MEDIA_FIXED, "easyRAID", "*", "*" },
 506                   CAM_QUIRK_NOHILUNS, /*mintags*/2, /*maxtags*/255
 507         },
 508         {
 509                 { T_ENCLOSURE, SIP_MEDIA_FIXED, "DP", "BACKPLANE", "*" },
 510                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 511         },
 512         {
 513                 /* Default tagged queuing parameters for all devices */
 514                 {
 515                   T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED,
 516                   /*vendor*/"*", /*product*/"*", /*revision*/"*"
 517                 },
 518                 /*quirks*/0, /*mintags*/2, /*maxtags*/255
 519         },
 520 };
 521
 522 static const int scsi_quirk_table_size =
 523         sizeof(scsi_quirk_table) / sizeof(*scsi_quirk_table);
 524
 525 static cam_status       proberegister(struct cam_periph *periph,
 526                                       void *arg);
 527 static void      probeschedule(struct cam_periph *probe_periph);
 528 static void      probestart(struct cam_periph *periph, union ccb *start_ccb);
 529 static void      proberequestdefaultnegotiation(struct cam_periph *periph);
 530 static int       proberequestbackoff(struct cam_periph *periph,
 531                                      struct cam_ed *device);
 532 static void      probedone(struct cam_periph *periph, union ccb *done_ccb);
 533 static void      probecleanup(struct cam_periph *periph);
 534 static void      scsi_find_quirk(struct cam_ed *device);
 535 static void      scsi_scan_bus(struct cam_periph *periph, union ccb *ccb);
 536 static void      scsi_scan_lun(struct cam_periph *periph,
 537                                struct cam_path *path, cam_flags flags,
 538                                union ccb *ccb);
 539 static void      xptscandone(struct cam_periph *periph, union ccb *done_ccb);
 540 static struct cam_ed *
 541                  scsi_alloc_device(struct cam_eb *bus, struct cam_et *target,
 542                                    lun_id_t lun_id);
 543 static void      scsi_devise_transport(struct cam_path *path);
 544 static void      scsi_set_transfer_settings(struct ccb_trans_settings *cts,
 545                                             struct cam_ed *device,
 546                                             int async_update);
 547 static void      scsi_toggle_tags(struct cam_path *path);
 548 static void      scsi_dev_async(u_int32_t async_code,
 549                                 struct cam_eb *bus,
 550                                 struct cam_et *target,
 551                                 struct cam_ed *device,
 552                                 void *async_arg);
 553 static void      scsi_action(union ccb *start_ccb);
 554
 555 static struct xpt_xport scsi_xport = {
 556         .alloc_device = scsi_alloc_device,
 557         .action = scsi_action,
 558         .async = scsi_dev_async,
 559 };
 560
 561 struct xpt_xport *
 562 scsi_get_xport(void)
 563 {
 564         return (&scsi_xport);
 565 }
 566
 567 static void
 568 probe_periph_init()
 569 {
 570 }
 571
 572 static cam_status
 573 proberegister(struct cam_periph *periph, void *arg)
 574 {
 575         union ccb *request_ccb; /* CCB representing the probe request */
 576         cam_status status;
 577         probe_softc *softc;
 578
 579         request_ccb = (union ccb *)arg;
 580         if (periph == NULL) {
 581                 printf("proberegister: periph was NULL!!\n");
 582                 return(CAM_REQ_CMP_ERR);
 583         }
 584
 585         if (request_ccb == NULL) {
 586                 printf("proberegister: no probe CCB, "
 587                        "can't register device\n");
 588                 return(CAM_REQ_CMP_ERR);
 589         }
 590
 591         softc = (probe_softc *)malloc(sizeof(*softc), M_CAMXPT, M_NOWAIT);
 592
 593         if (softc == NULL) {
 594                 printf("proberegister: Unable to probe new device. "
 595                        "Unable to allocate softc\n");
 596                 return(CAM_REQ_CMP_ERR);
 597         }
 598         TAILQ_INIT(&softc->request_ccbs);
 599         TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
 600                           periph_links.tqe);
 601         softc->flags = 0;
 602         periph->softc = softc;
 603         softc->periph = periph;
 604         softc->action = PROBE_INVALID;
 605         status = cam_periph_acquire(periph);
 606         if (status != CAM_REQ_CMP) {
 607                 return (status);
 608         }
 609
 610
 611         /*
 612          * Ensure we've waited at least a bus settle
 613          * delay before attempting to probe the device.
 614          * For HBAs that don't do bus resets, this won't make a difference.
 615          */
 616         cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset,
 617                                       scsi_delay);
 618         probeschedule(periph);
 619         return(CAM_REQ_CMP);
 620 }
 621
 622 static void
 623 probeschedule(struct cam_periph *periph)
 624 {
 625         struct ccb_pathinq cpi;
 626         union ccb *ccb;
 627         probe_softc *softc;
 628
 629         softc = (probe_softc *)periph->softc;
 630         ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
 631
 632         xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
 633         cpi.ccb_h.func_code = XPT_PATH_INQ;
 634         xpt_action((union ccb *)&cpi);
 635
 636         /*
 637          * If a device has gone away and another device, or the same one,
 638          * is back in the same place, it should have a unit attention
 639          * condition pending.  It will not report the unit attention in
 640          * response to an inquiry, which may leave invalid transfer
 641          * negotiations in effect.  The TUR will reveal the unit attention
 642          * condition.  Only send the TUR for lun 0, since some devices
 643          * will get confused by commands other than inquiry to non-existent
 644          * luns.  If you think a device has gone away start your scan from
 645          * lun 0.  This will insure that any bogus transfer settings are
 646          * invalidated.
 647          *
 648          * If we haven't seen the device before and the controller supports
 649          * some kind of transfer negotiation, negotiate with the first
 650          * sent command if no bus reset was performed at startup.  This
 651          * ensures that the device is not confused by transfer negotiation
 652          * settings left over by loader or BIOS action.
 653          */
 654         if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
 655          && (ccb->ccb_h.target_lun == 0)) {
 656                 PROBE_SET_ACTION(softc, PROBE_TUR);
 657         } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0
 658               && (cpi.hba_misc & PIM_NOBUSRESET) != 0) {
 659                 proberequestdefaultnegotiation(periph);
 660                 PROBE_SET_ACTION(softc, PROBE_INQUIRY);
 661         } else {
 662                 PROBE_SET_ACTION(softc, PROBE_INQUIRY);
 663         }
 664
 665         if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE)
 666                 softc->flags |= PROBE_NO_ANNOUNCE;
 667         else
 668                 softc->flags &= ~PROBE_NO_ANNOUNCE;
 669
 670         xpt_schedule(periph, ccb->ccb_h.pinfo.priority);
 671 }
 672
 673 static void
 674 probestart(struct cam_periph *periph, union ccb *start_ccb)
 675 {
 676         /* Probe the device that our peripheral driver points to */
 677         struct ccb_scsiio *csio;
 678         probe_softc *softc;
 679
 680         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n"));
 681
 682         softc = (probe_softc *)periph->softc;
 683         csio = &start_ccb->csio;
 684
 685         switch (softc->action) {
 686         case PROBE_TUR:
 687         case PROBE_TUR_FOR_NEGOTIATION:
 688         case PROBE_DV_EXIT:
 689         {
 690                 scsi_test_unit_ready(csio,
 691                                      /*retries*/10,
 692                                      probedone,
 693                                      MSG_SIMPLE_Q_TAG,
 694                                      SSD_FULL_SIZE,
 695                                      /*timeout*/60000);
 696                 break;
 697         }
 698         case PROBE_INQUIRY:
 699         case PROBE_FULL_INQUIRY:
 700         case PROBE_INQUIRY_BASIC_DV1:
 701         case PROBE_INQUIRY_BASIC_DV2:
 702         {
 703                 u_int inquiry_len;
 704                 struct scsi_inquiry_data *inq_buf;
 705
 706                 inq_buf = &periph->path->device->inq_data;
 707
 708                 /*
 709                  * If the device is currently configured, we calculate an
 710                  * MD5 checksum of the inquiry data, and if the serial number
 711                  * length is greater than 0, add the serial number data
 712                  * into the checksum as well.  Once the inquiry and the
 713                  * serial number check finish, we attempt to figure out
 714                  * whether we still have the same device.
 715                  */
 716                 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
 717
 718                         MD5Init(&softc->context);
 719                         MD5Update(&softc->context, (unsigned char *)inq_buf,
 720                                   sizeof(struct scsi_inquiry_data));
 721                         softc->flags |= PROBE_INQUIRY_CKSUM;
 722                         if (periph->path->device->serial_num_len > 0) {
 723                                 MD5Update(&softc->context,
 724                                           periph->path->device->serial_num,
 725                                           periph->path->device->serial_num_len);
 726                                 softc->flags |= PROBE_SERIAL_CKSUM;
 727                         }
 728                         MD5Final(softc->digest, &softc->context);
 729                 }
 730
 731                 if (softc->action == PROBE_INQUIRY)
 732                         inquiry_len = SHORT_INQUIRY_LENGTH;
 733                 else
 734                         inquiry_len = SID_ADDITIONAL_LENGTH(inq_buf);
 735
 736                 /*
 737                  * Some parallel SCSI devices fail to send an
 738                  * ignore wide residue message when dealing with
 739                  * odd length inquiry requests.  Round up to be
 740                  * safe.
 741                  */
 742                 inquiry_len = roundup2(inquiry_len, 2);
 743
 744                 if (softc->action == PROBE_INQUIRY_BASIC_DV1
 745                  || softc->action == PROBE_INQUIRY_BASIC_DV2) {
 746                         inq_buf = malloc(inquiry_len, M_CAMXPT, M_NOWAIT);
 747                 }
 748                 if (inq_buf == NULL) {
 749                         xpt_print(periph->path, "malloc failure- skipping Basic"
 750                             "Domain Validation\n");
 751                         PROBE_SET_ACTION(softc, PROBE_DV_EXIT);
 752                         scsi_test_unit_ready(csio,
 753                                              /*retries*/4,
 754                                              probedone,
 755                                              MSG_SIMPLE_Q_TAG,
 756                                              SSD_FULL_SIZE,
 757                                              /*timeout*/60000);
 758                         break;
 759                 }
 760                 scsi_inquiry(csio,
 761                              /*retries*/4,
 762                              probedone,
 763                              MSG_SIMPLE_Q_TAG,
 764                              (u_int8_t *)inq_buf,
 765                              inquiry_len,
 766                              /*evpd*/FALSE,
 767                              /*page_code*/0,
 768                              SSD_MIN_SIZE,
 769                              /*timeout*/60 * 1000);
 770                 break;
 771         }
 772         case PROBE_MODE_SENSE:
 773         {
 774                 void  *mode_buf;
 775                 int    mode_buf_len;
 776
 777                 mode_buf_len = sizeof(struct scsi_mode_header_6)
 778                              + sizeof(struct scsi_mode_blk_desc)
 779                              + sizeof(struct scsi_control_page);
 780                 mode_buf = malloc(mode_buf_len, M_CAMXPT, M_NOWAIT);
 781                 if (mode_buf != NULL) {
 782                         scsi_mode_sense(csio,
 783                                         /*retries*/4,
 784                                         probedone,
 785                                         MSG_SIMPLE_Q_TAG,
 786                                         /*dbd*/FALSE,
 787                                         SMS_PAGE_CTRL_CURRENT,
 788                                         SMS_CONTROL_MODE_PAGE,
 789                                         mode_buf,
 790                                         mode_buf_len,
 791                                         SSD_FULL_SIZE,
 792                                         /*timeout*/60000);
 793                         break;
 794                 }
 795                 xpt_print(periph->path, "Unable to mode sense control page - "
 796                     "malloc failure\n");
 797                 PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_0);
 798         }
 799         /* FALLTHROUGH */
 800         case PROBE_SERIAL_NUM_0:
 801         {
 802                 struct scsi_vpd_supported_page_list *vpd_list = NULL;
 803                 struct cam_ed *device;
 804
 805                 device = periph->path->device;
 806                 if ((SCSI_QUIRK(device)->quirks & CAM_QUIRK_NOSERIAL) == 0) {
 807                         vpd_list = malloc(sizeof(*vpd_list), M_CAMXPT,
 808                             M_NOWAIT | M_ZERO);
 809                 }
 810
 811                 if (vpd_list != NULL) {
 812                         scsi_inquiry(csio,
 813                                      /*retries*/4,
 814                                      probedone,
 815                                      MSG_SIMPLE_Q_TAG,
 816                                      (u_int8_t *)vpd_list,
 817                                      sizeof(*vpd_list),
 818                                      /*evpd*/TRUE,
 819                                      SVPD_SUPPORTED_PAGE_LIST,
 820                                      SSD_MIN_SIZE,
 821                                      /*timeout*/60 * 1000);
 822                         break;
 823                 }
 824                 /*
 825                  * We'll have to do without, let our probedone
 826                  * routine finish up for us.
 827                  */
 828                 start_ccb->csio.data_ptr = NULL;
 829                 probedone(periph, start_ccb);
 830                 return;
 831         }
 832         case PROBE_SERIAL_NUM_1:
 833         {
 834                 struct scsi_vpd_unit_serial_number *serial_buf;
 835                 struct cam_ed* device;
 836
 837                 serial_buf = NULL;
 838                 device = periph->path->device;
 839                 if (device->serial_num != NULL) {
 840                         free(device->serial_num, M_CAMXPT);
 841                         device->serial_num = NULL;
 842                         device->serial_num_len = 0;
 843                 }
 844
 845                 serial_buf = (struct scsi_vpd_unit_serial_number *)
 846                         malloc(sizeof(*serial_buf), M_CAMXPT, M_NOWAIT|M_ZERO);
 847
 848                 if (serial_buf != NULL) {
 849                         scsi_inquiry(csio,
 850                                      /*retries*/4,
 851                                      probedone,
 852                                      MSG_SIMPLE_Q_TAG,
 853                                      (u_int8_t *)serial_buf,
 854                                      sizeof(*serial_buf),
 855                                      /*evpd*/TRUE,
 856                                      SVPD_UNIT_SERIAL_NUMBER,
 857                                      SSD_MIN_SIZE,
 858                                      /*timeout*/60 * 1000);
 859                         break;
 860                 }
 861                 /*
 862                  * We'll have to do without, let our probedone
 863                  * routine finish up for us.
 864                  */
 865                 start_ccb->csio.data_ptr = NULL;
 866                 probedone(periph, start_ccb);
 867                 return;
 868         }
 869         case PROBE_INVALID:
 870                 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
 871                     ("probestart: invalid action state\n"));
 872         default:
 873                 break;
 874         }
 875         xpt_action(start_ccb);
 876 }
 877
 878 static void
 879 proberequestdefaultnegotiation(struct cam_periph *periph)
 880 {
 881         struct ccb_trans_settings cts;
 882
 883         xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1);
 884         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
 885         cts.type = CTS_TYPE_USER_SETTINGS;
 886         xpt_action((union ccb *)&cts);
 887         if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 888                 return;
 889         }
 890         cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
 891         cts.type = CTS_TYPE_CURRENT_SETTINGS;
 892         xpt_action((union ccb *)&cts);
 893 }
 894
 895 /*
 896  * Backoff Negotiation Code- only pertinent for SPI devices.
 897  */
 898 static int
 899 proberequestbackoff(struct cam_periph *periph, struct cam_ed *device)
 900 {
 901         struct ccb_trans_settings cts;
 902         struct ccb_trans_settings_spi *spi;
 903
 904         memset(&cts, 0, sizeof (cts));
 905         xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1);
 906         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
 907         cts.type = CTS_TYPE_CURRENT_SETTINGS;
 908         xpt_action((union ccb *)&cts);
 909         if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
 910                 if (bootverbose) {
 911                         xpt_print(periph->path,
 912                             "failed to get current device settings\n");
 913                 }
 914                 return (0);
 915         }
 916         if (cts.transport != XPORT_SPI) {
 917                 if (bootverbose) {
 918                         xpt_print(periph->path, "not SPI transport\n");
 919                 }
 920                 return (0);
 921         }
 922         spi = &cts.xport_specific.spi;
 923
 924         /*
 925          * We cannot renegotiate sync rate if we don't have one.
 926          */
 927         if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) {
 928                 if (bootverbose) {
 929                         xpt_print(periph->path, "no sync rate known\n");
 930                 }
 931                 return (0);
 932         }
 933
 934         /*
 935          * We'll assert that we don't have to touch PPR options- the
 936          * SIM will see what we do with period and offset and adjust
 937          * the PPR options as appropriate.
 938          */
 939
 940         /*
 941          * A sync rate with unknown or zero offset is nonsensical.
 942          * A sync period of zero means Async.
 943          */
 944         if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0
 945          || spi->sync_offset == 0 || spi->sync_period == 0) {
 946                 if (bootverbose) {
 947                         xpt_print(periph->path, "no sync rate available\n");
 948                 }
 949                 return (0);
 950         }
 951
 952         if (device->flags & CAM_DEV_DV_HIT_BOTTOM) {
 953                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
 954                     ("hit async: giving up on DV\n"));
 955                 return (0);
 956         }
 957
 958
 959         /*
 960          * Jump sync_period up by one, but stop at 5MHz and fall back to Async.
 961          * We don't try to remember 'last' settings to see if the SIM actually
 962          * gets into the speed we want to set. We check on the SIM telling
 963          * us that a requested speed is bad, but otherwise don't try and
 964          * check the speed due to the asynchronous and handshake nature
 965          * of speed setting.
 966          */
 967         spi->valid = CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_SYNC_OFFSET;
 968         for (;;) {
 969                 spi->sync_period++;
 970                 if (spi->sync_period >= 0xf) {
 971                         spi->sync_period = 0;
 972                         spi->sync_offset = 0;
 973                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
 974                             ("setting to async for DV\n"));
 975                         /*
 976                          * Once we hit async, we don't want to try
 977                          * any more settings.
 978                          */
 979                         device->flags |= CAM_DEV_DV_HIT_BOTTOM;
 980                 } else if (bootverbose) {
 981                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
 982                             ("DV: period 0x%x\n", spi->sync_period));
 983                         printf("setting period to 0x%x\n", spi->sync_period);
 984                 }
 985                 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
 986                 cts.type = CTS_TYPE_CURRENT_SETTINGS;
 987                 xpt_action((union ccb *)&cts);
 988                 if ((cts.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
 989                         break;
 990                 }
 991                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
 992                     ("DV: failed to set period 0x%x\n", spi->sync_period));
 993                 if (spi->sync_period == 0) {
 994                         return (0);
 995                 }
 996         }
 997         return (1);
 998 }
 999
1000 static void
1001 probedone(struct cam_periph *periph, union ccb *done_ccb)
1002 {
1003         probe_softc *softc;
1004         struct cam_path *path;
1005         u_int32_t  priority;
1006
1007         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n"));
1008
1009         softc = (probe_softc *)periph->softc;
1010         path = done_ccb->ccb_h.path;
1011         priority = done_ccb->ccb_h.pinfo.priority;
1012
1013         switch (softc->action) {
1014         case PROBE_TUR:
1015         {
1016                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1017
1018                         if (cam_periph_error(done_ccb, 0,
1019                                              SF_NO_PRINT, NULL) == ERESTART)
1020                                 return;
1021                         else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
1022                                 /* Don't wedge the queue */
1023                                 xpt_release_devq(done_ccb->ccb_h.path,
1024                                                  /*count*/1,
1025                                                  /*run_queue*/TRUE);
1026                 }
1027                 PROBE_SET_ACTION(softc, PROBE_INQUIRY);
1028                 xpt_release_ccb(done_ccb);
1029                 xpt_schedule(periph, priority);
1030                 return;
1031         }
1032         case PROBE_INQUIRY:
1033         case PROBE_FULL_INQUIRY:
1034         {
1035                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
1036                         struct scsi_inquiry_data *inq_buf;
1037                         u_int8_t periph_qual;
1038
1039                         path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID;
1040                         inq_buf = &path->device->inq_data;
1041
1042                         periph_qual = SID_QUAL(inq_buf);
1043
1044                         switch(periph_qual) {
1045                         case SID_QUAL_LU_CONNECTED:
1046                         {
1047                                 u_int8_t len;
1048
1049                                 /*
1050                                  * We conservatively request only
1051                                  * SHORT_INQUIRY_LEN bytes of inquiry
1052                                  * information during our first try
1053                                  * at sending an INQUIRY. If the device
1054                                  * has more information to give,
1055                                  * perform a second request specifying
1056                                  * the amount of information the device
1057                                  * is willing to give.
1058                                  */
1059                                 len = inq_buf->additional_length
1060                                     + offsetof(struct scsi_inquiry_data,
1061                                                additional_length) + 1;
1062                                 if (softc->action == PROBE_INQUIRY
1063                                     && len > SHORT_INQUIRY_LENGTH) {
1064                                         PROBE_SET_ACTION(softc, PROBE_FULL_INQUIRY);
1065                                         xpt_release_ccb(done_ccb);
1066                                         xpt_schedule(periph, priority);
1067                                         return;
1068                                 }
1069
1070                                 scsi_find_quirk(path->device);
1071
1072                                 scsi_devise_transport(path);
1073                                 if (INQ_DATA_TQ_ENABLED(inq_buf))
1074                                         PROBE_SET_ACTION(softc, PROBE_MODE_SENSE);
1075                                 else
1076                                         PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_0);
1077
1078                                 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
1079
1080                                 xpt_release_ccb(done_ccb);
1081                                 xpt_schedule(periph, priority);
1082                                 return;
1083                         }
1084                         default:
1085                                 break;
1086                         }
1087                 } else if (cam_periph_error(done_ccb, 0,
1088                                             done_ccb->ccb_h.target_lun > 0
1089                                             ? SF_RETRY_UA|SF_QUIET_IR
1090                                             : SF_RETRY_UA,
1091                                             &softc->saved_ccb) == ERESTART) {
1092                         return;
1093                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1094                         /* Don't wedge the queue */
1095                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
1096                                          /*run_queue*/TRUE);
1097                 }
1098                 /*
1099                  * If we get to this point, we got an error status back
1100                  * from the inquiry and the error status doesn't require
1101                  * automatically retrying the command.  Therefore, the
1102                  * inquiry failed.  If we had inquiry information before
1103                  * for this device, but this latest inquiry command failed,
1104                  * the device has probably gone away.  If this device isn't
1105                  * already marked unconfigured, notify the peripheral
1106                  * drivers that this device is no more.
1107                  */
1108                 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
1109                         /* Send the async notification. */
1110                         xpt_async(AC_LOST_DEVICE, path, NULL);
1111
1112                 xpt_release_ccb(done_ccb);
1113                 break;
1114         }
1115         case PROBE_MODE_SENSE:
1116         {
1117                 struct ccb_scsiio *csio;
1118                 struct scsi_mode_header_6 *mode_hdr;
1119
1120                 csio = &done_ccb->csio;
1121                 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr;
1122                 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
1123                         struct scsi_control_page *page;
1124                         u_int8_t *offset;
1125
1126                         offset = ((u_int8_t *)&mode_hdr[1])
1127                             + mode_hdr->blk_desc_len;
1128                         page = (struct scsi_control_page *)offset;
1129                         path->device->queue_flags = page->queue_flags;
1130                 } else if (cam_periph_error(done_ccb, 0,
1131                                             SF_RETRY_UA|SF_NO_PRINT,
1132                                             &softc->saved_ccb) == ERESTART) {
1133                         return;
1134                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1135                         /* Don't wedge the queue */
1136                         xpt_release_devq(done_ccb->ccb_h.path,
1137                                          /*count*/1, /*run_queue*/TRUE);
1138                 }
1139                 xpt_release_ccb(done_ccb);
1140                 free(mode_hdr, M_CAMXPT);
1141                 PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_0);
1142                 xpt_schedule(periph, priority);
1143                 return;
1144         }
1145         case PROBE_SERIAL_NUM_0:
1146         {
1147                 struct ccb_scsiio *csio;
1148                 struct scsi_vpd_supported_page_list *page_list;
1149                 int length, serialnum_supported, i;
1150
1151                 serialnum_supported = 0;
1152                 csio = &done_ccb->csio;
1153                 page_list =
1154                     (struct scsi_vpd_supported_page_list *)csio->data_ptr;
1155
1156                 if (page_list == NULL) {
1157                         /*
1158                          * Don't process the command as it was never sent
1159                          */
1160                 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
1161                     && (page_list->length > 0)) {
1162                         length = min(page_list->length,
1163                             SVPD_SUPPORTED_PAGES_SIZE);
1164                         for (i = 0; i < length; i++) {
1165                                 if (page_list->list[i] ==
1166                                     SVPD_UNIT_SERIAL_NUMBER) {
1167                                         serialnum_supported = 1;
1168                                         break;
1169                                 }
1170                         }
1171                 } else if (cam_periph_error(done_ccb, 0,
1172                                             SF_RETRY_UA|SF_NO_PRINT,
1173                                             &softc->saved_ccb) == ERESTART) {
1174                         return;
1175                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1176                         /* Don't wedge the queue */
1177                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
1178                                          /*run_queue*/TRUE);
1179                 }
1180
1181                 if (page_list != NULL)
1182                         free(page_list, M_CAMXPT);
1183
1184                 if (serialnum_supported) {
1185                         xpt_release_ccb(done_ccb);
1186                         PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_1);
1187                         xpt_schedule(periph, priority);
1188                         return;
1189                 }
1190
1191                 csio->data_ptr = NULL;
1192                 /* FALLTHROUGH */
1193         }
1194
1195         case PROBE_SERIAL_NUM_1:
1196         {
1197                 struct ccb_scsiio *csio;
1198                 struct scsi_vpd_unit_serial_number *serial_buf;
1199                 u_int32_t  priority;
1200                 int changed;
1201                 int have_serialnum;
1202
1203                 changed = 1;
1204                 have_serialnum = 0;
1205                 csio = &done_ccb->csio;
1206                 priority = done_ccb->ccb_h.pinfo.priority;
1207                 serial_buf =
1208                     (struct scsi_vpd_unit_serial_number *)csio->data_ptr;
1209
1210                 /* Clean up from previous instance of this device */
1211                 if (path->device->serial_num != NULL) {
1212                         free(path->device->serial_num, M_CAMXPT);
1213                         path->device->serial_num = NULL;
1214                         path->device->serial_num_len = 0;
1215                 }
1216
1217                 if (serial_buf == NULL) {
1218                         /*
1219                          * Don't process the command as it was never sent
1220                          */
1221                 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
1222                         && (serial_buf->length > 0)) {
1223
1224                         have_serialnum = 1;
1225                         path->device->serial_num =
1226                                 (u_int8_t *)malloc((serial_buf->length + 1),
1227                                                    M_CAMXPT, M_NOWAIT);
1228                         if (path->device->serial_num != NULL) {
1229                                 bcopy(serial_buf->serial_num,
1230                                       path->device->serial_num,
1231                                       serial_buf->length);
1232                                 path->device->serial_num_len =
1233                                     serial_buf->length;
1234                                 path->device->serial_num[serial_buf->length]
1235                                     = '\0';
1236                         }
1237                 } else if (cam_periph_error(done_ccb, 0,
1238                                             SF_RETRY_UA|SF_NO_PRINT,
1239                                             &softc->saved_ccb) == ERESTART) {
1240                         return;
1241                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1242                         /* Don't wedge the queue */
1243                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
1244                                          /*run_queue*/TRUE);
1245                 }
1246
1247                 /*
1248                  * Let's see if we have seen this device before.
1249                  */
1250                 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) {
1251                         MD5_CTX context;
1252                         u_int8_t digest[16];
1253
1254                         MD5Init(&context);
1255
1256                         MD5Update(&context,
1257                                   (unsigned char *)&path->device->inq_data,
1258                                   sizeof(struct scsi_inquiry_data));
1259
1260                         if (have_serialnum)
1261                                 MD5Update(&context, serial_buf->serial_num,
1262                                           serial_buf->length);
1263
1264                         MD5Final(digest, &context);
1265                         if (bcmp(softc->digest, digest, 16) == 0)
1266                                 changed = 0;
1267
1268                         /*
1269                          * XXX Do we need to do a TUR in order to ensure
1270                          *     that the device really hasn't changed???
1271                          */
1272                         if ((changed != 0)
1273                          && ((softc->flags & PROBE_NO_ANNOUNCE) == 0))
1274                                 xpt_async(AC_LOST_DEVICE, path, NULL);
1275                 }
1276                 if (serial_buf != NULL)
1277                         free(serial_buf, M_CAMXPT);
1278
1279                 if (changed != 0) {
1280                         /*
1281                          * Now that we have all the necessary
1282                          * information to safely perform transfer
1283                          * negotiations... Controllers don't perform
1284                          * any negotiation or tagged queuing until
1285                          * after the first XPT_SET_TRAN_SETTINGS ccb is
1286                          * received.  So, on a new device, just retrieve
1287                          * the user settings, and set them as the current
1288                          * settings to set the device up.
1289                          */
1290                         proberequestdefaultnegotiation(periph);
1291                         xpt_release_ccb(done_ccb);
1292
1293                         /*
1294                          * Perform a TUR to allow the controller to
1295                          * perform any necessary transfer negotiation.
1296                          */
1297                         PROBE_SET_ACTION(softc, PROBE_TUR_FOR_NEGOTIATION);
1298                         xpt_schedule(periph, priority);
1299                         return;
1300                 }
1301                 xpt_release_ccb(done_ccb);
1302                 break;
1303         }
1304         case PROBE_TUR_FOR_NEGOTIATION:
1305                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1306                         DELAY(500000);
1307                         if (cam_periph_error(done_ccb, 0, SF_RETRY_UA,
1308                             NULL) == ERESTART)
1309                                 return;
1310                 }
1311         /* FALLTHROUGH */
1312         case PROBE_DV_EXIT:
1313                 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1314                         /* Don't wedge the queue */
1315                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
1316                                          /*run_queue*/TRUE);
1317                 }
1318                 /*
1319                  * Do Domain Validation for lun 0 on devices that claim
1320                  * to support Synchronous Transfer modes.
1321                  */
1322                 if (softc->action == PROBE_TUR_FOR_NEGOTIATION
1323                  && done_ccb->ccb_h.target_lun == 0
1324                  && (path->device->inq_data.flags & SID_Sync) != 0
1325                  && (path->device->flags & CAM_DEV_IN_DV) == 0) {
1326                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1327                             ("Begin Domain Validation\n"));
1328                         path->device->flags |= CAM_DEV_IN_DV;
1329                         xpt_release_ccb(done_ccb);
1330                         PROBE_SET_ACTION(softc, PROBE_INQUIRY_BASIC_DV1);
1331                         xpt_schedule(periph, priority);
1332                         return;
1333                 }
1334                 if (softc->action == PROBE_DV_EXIT) {
1335                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1336                             ("Leave Domain Validation\n"));
1337                 }
1338                 path->device->flags &=
1339                     ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM);
1340                 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) {
1341                         /* Inform the XPT that a new device has been found */
1342                         done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
1343                         xpt_action(done_ccb);
1344                         xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path,
1345                                   done_ccb);
1346                 }
1347                 xpt_release_ccb(done_ccb);
1348                 break;
1349         case PROBE_INQUIRY_BASIC_DV1:
1350         case PROBE_INQUIRY_BASIC_DV2:
1351         {
1352                 struct scsi_inquiry_data *nbuf;
1353                 struct ccb_scsiio *csio;
1354
1355                 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
1356                         /* Don't wedge the queue */
1357                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
1358                                          /*run_queue*/TRUE);
1359                 }
1360                 csio = &done_ccb->csio;
1361                 nbuf = (struct scsi_inquiry_data *)csio->data_ptr;
1362                 if (bcmp(nbuf, &path->device->inq_data, SHORT_INQUIRY_LENGTH)) {
1363                         xpt_print(path,
1364                             "inquiry data fails comparison at DV%d step\n",
1365                             softc->action == PROBE_INQUIRY_BASIC_DV1 ? 1 : 2);
1366                         if (proberequestbackoff(periph, path->device)) {
1367                                 path->device->flags &= ~CAM_DEV_IN_DV;
1368                                 PROBE_SET_ACTION(softc, PROBE_TUR_FOR_NEGOTIATION);
1369                         } else {
1370                                 /* give up */
1371                                 PROBE_SET_ACTION(softc, PROBE_DV_EXIT);
1372                         }
1373                         free(nbuf, M_CAMXPT);
1374                         xpt_release_ccb(done_ccb);
1375                         xpt_schedule(periph, priority);
1376                         return;
1377                 }
1378                 free(nbuf, M_CAMXPT);
1379                 if (softc->action == PROBE_INQUIRY_BASIC_DV1) {
1380                         PROBE_SET_ACTION(softc, PROBE_INQUIRY_BASIC_DV2);
1381                         xpt_release_ccb(done_ccb);
1382                         xpt_schedule(periph, priority);
1383                         return;
1384                 }
1385                 if (softc->action == PROBE_INQUIRY_BASIC_DV2) {
1386                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
1387                             ("Leave Domain Validation Successfully\n"));
1388                 }
1389                 path->device->flags &=
1390                     ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM);
1391                 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) {
1392                         /* Inform the XPT that a new device has been found */
1393                         done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
1394                         xpt_action(done_ccb);
1395                         xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path,
1396                                   done_ccb);
1397                 }
1398                 xpt_release_ccb(done_ccb);
1399                 break;
1400         }
1401         case PROBE_INVALID:
1402                 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_INFO,
1403                     ("probedone: invalid action state\n"));
1404         default:
1405                 break;
1406         }
1407         done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
1408         TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe);
1409         done_ccb->ccb_h.status = CAM_REQ_CMP;
1410         xpt_done(done_ccb);
1411         if (TAILQ_FIRST(&softc->request_ccbs) == NULL) {
1412                 cam_periph_invalidate(periph);
1413                 cam_periph_release_locked(periph);
1414         } else {
1415                 probeschedule(periph);
1416         }
1417 }
1418
1419 static void
1420 probecleanup(struct cam_periph *periph)
1421 {
1422         free(periph->softc, M_CAMXPT);
1423 }
1424
1425 static void
1426 scsi_find_quirk(struct cam_ed *device)
1427 {
1428         struct scsi_quirk_entry *quirk;
1429         caddr_t match;
1430
1431         match = cam_quirkmatch((caddr_t)&device->inq_data,
1432                                (caddr_t)scsi_quirk_table,
1433                                sizeof(scsi_quirk_table) /
1434                                sizeof(*scsi_quirk_table),
1435                                sizeof(*scsi_quirk_table), scsi_inquiry_match);
1436
1437         if (match == NULL)
1438                 panic("xpt_find_quirk: device didn't match wildcard entry!!");
1439
1440         quirk = (struct scsi_quirk_entry *)match;
1441         device->quirk = quirk;
1442         device->mintags = quirk->mintags;
1443         device->maxtags = quirk->maxtags;
1444 }
1445
1446 static int
1447 sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS)
1448 {
1449         int error, bool;
1450
1451         bool = cam_srch_hi;
1452         error = sysctl_handle_int(oidp, &bool, 0, req);
1453         if (error != 0 || req->newptr == NULL)
1454                 return (error);
1455         if (bool == 0 || bool == 1) {
1456                 cam_srch_hi = bool;
1457                 return (0);
1458         } else {
1459                 return (EINVAL);
1460         }
1461 }
1462
1463 typedef struct {
1464         union   ccb *request_ccb;
1465         struct  ccb_pathinq *cpi;
1466         int     counter;
1467 } scsi_scan_bus_info;
1468
1469 /*
1470  * To start a scan, request_ccb is an XPT_SCAN_BUS ccb.
1471  * As the scan progresses, scsi_scan_bus is used as the
1472  * callback on completion function.
1473  */
1474 static void
1475 scsi_scan_bus(struct cam_periph *periph, union ccb *request_ccb)
1476 {
1477         CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
1478                   ("scsi_scan_bus\n"));
1479         switch (request_ccb->ccb_h.func_code) {
1480         case XPT_SCAN_BUS:
1481         {
1482                 scsi_scan_bus_info *scan_info;
1483                 union   ccb *work_ccb;
1484                 struct  cam_path *path;
1485                 u_int   i;
1486                 u_int   max_target;
1487                 u_int   initiator_id;
1488
1489                 /* Find out the characteristics of the bus */
1490                 work_ccb = xpt_alloc_ccb_nowait();
1491                 if (work_ccb == NULL) {
1492                         request_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
1493                         xpt_done(request_ccb);
1494                         return;
1495                 }
1496                 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path,
1497                               request_ccb->ccb_h.pinfo.priority);
1498                 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
1499                 xpt_action(work_ccb);
1500                 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
1501                         request_ccb->ccb_h.status = work_ccb->ccb_h.status;
1502                         xpt_free_ccb(work_ccb);
1503                         xpt_done(request_ccb);
1504                         return;
1505                 }
1506
1507                 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) {
1508                         /*
1509                          * Can't scan the bus on an adapter that
1510                          * cannot perform the initiator role.
1511                          */
1512                         request_ccb->ccb_h.status = CAM_REQ_CMP;
1513                         xpt_free_ccb(work_ccb);
1514                         xpt_done(request_ccb);
1515                         return;
1516                 }
1517
1518                 /* Save some state for use while we probe for devices */
1519                 scan_info = (scsi_scan_bus_info *)
1520                     malloc(sizeof(scsi_scan_bus_info), M_CAMXPT, M_NOWAIT);
1521                 if (scan_info == NULL) {
1522                         request_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
1523                         xpt_done(request_ccb);
1524                         return;
1525                 }
1526                 scan_info->request_ccb = request_ccb;
1527                 scan_info->cpi = &work_ccb->cpi;
1528
1529                 /* Cache on our stack so we can work asynchronously */
1530                 max_target = scan_info->cpi->max_target;
1531                 initiator_id = scan_info->cpi->initiator_id;
1532
1533
1534                 /*
1535                  * We can scan all targets in parallel, or do it sequentially.
1536                  */
1537                 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) {
1538                         max_target = 0;
1539                         scan_info->counter = 0;
1540                 } else {
1541                         scan_info->counter = scan_info->cpi->max_target + 1;
1542                         if (scan_info->cpi->initiator_id < scan_info->counter) {
1543                                 scan_info->counter--;
1544                         }
1545                 }
1546
1547                 for (i = 0; i <= max_target; i++) {
1548                         cam_status status;
1549                         if (i == initiator_id)
1550                                 continue;
1551
1552                         status = xpt_create_path(&path, xpt_periph,
1553                                                  request_ccb->ccb_h.path_id,
1554                                                  i, 0);
1555                         if (status != CAM_REQ_CMP) {
1556                                 printf("scsi_scan_bus: xpt_create_path failed"
1557                                        " with status %#x, bus scan halted\n",
1558                                        status);
1559                                 free(scan_info, M_CAMXPT);
1560                                 request_ccb->ccb_h.status = status;
1561                                 xpt_free_ccb(work_ccb);
1562                                 xpt_done(request_ccb);
1563                                 break;
1564                         }
1565                         work_ccb = xpt_alloc_ccb_nowait();
1566                         if (work_ccb == NULL) {
1567                                 xpt_free_ccb((union ccb *)scan_info->cpi);
1568                                 free(scan_info, M_CAMXPT);
1569                                 xpt_free_path(path);
1570                                 request_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
1571                                 xpt_done(request_ccb);
1572                                 break;
1573                         }
1574                         xpt_setup_ccb(&work_ccb->ccb_h, path,
1575                                       request_ccb->ccb_h.pinfo.priority);
1576                         work_ccb->ccb_h.func_code = XPT_SCAN_LUN;
1577                         work_ccb->ccb_h.cbfcnp = scsi_scan_bus;
1578                         work_ccb->ccb_h.ppriv_ptr0 = scan_info;
1579                         work_ccb->crcn.flags = request_ccb->crcn.flags;
1580                         xpt_action(work_ccb);
1581                 }
1582                 break;
1583         }
1584         case XPT_SCAN_LUN:
1585         {
1586                 cam_status status;
1587                 struct cam_path *path;
1588                 scsi_scan_bus_info *scan_info;
1589                 path_id_t path_id;
1590                 target_id_t target_id;
1591                 lun_id_t lun_id;
1592
1593                 /* Reuse the same CCB to query if a device was really found */
1594                 scan_info = (scsi_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0;
1595                 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path,
1596                               request_ccb->ccb_h.pinfo.priority);
1597                 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
1598
1599                 path_id = request_ccb->ccb_h.path_id;
1600                 target_id = request_ccb->ccb_h.target_id;
1601                 lun_id = request_ccb->ccb_h.target_lun;
1602                 xpt_action(request_ccb);
1603
1604                 if (request_ccb->ccb_h.status != CAM_REQ_CMP) {
1605                         struct cam_ed *device;
1606                         struct cam_et *target;
1607                         int phl;
1608
1609                         /*
1610                          * If we already probed lun 0 successfully, or
1611                          * we have additional configured luns on this
1612                          * target that might have "gone away", go onto
1613                          * the next lun.
1614                          */
1615                         target = request_ccb->ccb_h.path->target;
1616                         /*
1617                          * We may touch devices that we don't
1618                          * hold references too, so ensure they
1619                          * don't disappear out from under us.
1620                          * The target above is referenced by the
1621                          * path in the request ccb.
1622                          */
1623                         phl = 0;
1624                         device = TAILQ_FIRST(&target->ed_entries);
1625                         if (device != NULL) {
1626                                 phl = CAN_SRCH_HI_SPARSE(device);
1627                                 if (device->lun_id == 0)
1628                                         device = TAILQ_NEXT(device, links);
1629                         }
1630                         if ((lun_id != 0) || (device != NULL)) {
1631                                 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl)
1632                                         lun_id++;
1633                         }
1634                 } else {
1635                         struct cam_ed *device;
1636
1637                         device = request_ccb->ccb_h.path->device;
1638
1639                         if ((SCSI_QUIRK(device)->quirks &
1640                             CAM_QUIRK_NOLUNS) == 0) {
1641                                 /* Try the next lun */
1642                                 if (lun_id < (CAM_SCSI2_MAXLUN-1)
1643                                   || CAN_SRCH_HI_DENSE(device))
1644                                         lun_id++;
1645                         }
1646                 }
1647
1648                 /*
1649                  * Free the current request path- we're done with it.
1650                  */
1651                 xpt_free_path(request_ccb->ccb_h.path);
1652
1653                 /*
1654                  * Check to see if we scan any further luns.
1655                  */
1656                 if (lun_id == request_ccb->ccb_h.target_lun
1657                  || lun_id > scan_info->cpi->max_lun) {
1658                         int done;
1659
1660  hop_again:
1661                         done = 0;
1662                         if (scan_info->cpi->hba_misc & PIM_SEQSCAN) {
1663                                 scan_info->counter++;
1664                                 if (scan_info->counter ==
1665                                     scan_info->cpi->initiator_id) {
1666                                         scan_info->counter++;
1667                                 }
1668                                 if (scan_info->counter >=
1669                                     scan_info->cpi->max_target+1) {
1670                                         done = 1;
1671                                 }
1672                         } else {
1673                                 scan_info->counter--;
1674                                 if (scan_info->counter == 0) {
1675                                         done = 1;
1676                                 }
1677                         }
1678                         if (done) {
1679                                 xpt_free_ccb(request_ccb);
1680                                 xpt_free_ccb((union ccb *)scan_info->cpi);
1681                                 request_ccb = scan_info->request_ccb;
1682                                 free(scan_info, M_CAMXPT);
1683                                 request_ccb->ccb_h.status = CAM_REQ_CMP;
1684                                 xpt_done(request_ccb);
1685                                 break;
1686                         }
1687
1688                         if ((scan_info->cpi->hba_misc & PIM_SEQSCAN) == 0) {
1689                                 xpt_free_ccb(request_ccb);
1690                                 break;
1691                         }
1692                         status = xpt_create_path(&path, xpt_periph,
1693                             scan_info->request_ccb->ccb_h.path_id,
1694                             scan_info->counter, 0);
1695                         if (status != CAM_REQ_CMP) {
1696                                 printf("scsi_scan_bus: xpt_create_path failed"
1697                                     " with status %#x, bus scan halted\n",
1698                                     status);
1699                                 xpt_free_ccb(request_ccb);
1700                                 xpt_free_ccb((union ccb *)scan_info->cpi);
1701                                 request_ccb = scan_info->request_ccb;
1702                                 free(scan_info, M_CAMXPT);
1703                                 request_ccb->ccb_h.status = status;
1704                                 xpt_done(request_ccb);
1705                                 break;
1706                         }
1707                         xpt_setup_ccb(&request_ccb->ccb_h, path,
1708                             request_ccb->ccb_h.pinfo.priority);
1709                         request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
1710                         request_ccb->ccb_h.cbfcnp = scsi_scan_bus;
1711                         request_ccb->ccb_h.ppriv_ptr0 = scan_info;
1712                         request_ccb->crcn.flags =
1713                             scan_info->request_ccb->crcn.flags;
1714                 } else {
1715                         status = xpt_create_path(&path, xpt_periph,
1716                                                  path_id, target_id, lun_id);
1717                         if (status != CAM_REQ_CMP) {
1718                                 printf("scsi_scan_bus: xpt_create_path failed "
1719                                        "with status %#x, halting LUN scan\n",
1720                                        status);
1721                                 goto hop_again;
1722                         }
1723                         xpt_setup_ccb(&request_ccb->ccb_h, path,
1724                                       request_ccb->ccb_h.pinfo.priority);
1725                         request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
1726                         request_ccb->ccb_h.cbfcnp = scsi_scan_bus;
1727                         request_ccb->ccb_h.ppriv_ptr0 = scan_info;
1728                         request_ccb->crcn.flags =
1729                                 scan_info->request_ccb->crcn.flags;
1730                 }
1731                 xpt_action(request_ccb);
1732                 break;
1733         }
1734         default:
1735                 break;
1736         }
1737 }
1738
1739 static void
1740 scsi_scan_lun(struct cam_periph *periph, struct cam_path *path,
1741              cam_flags flags, union ccb *request_ccb)
1742 {
1743         struct ccb_pathinq cpi;
1744         cam_status status;
1745         struct cam_path *new_path;
1746         struct cam_periph *old_periph;
1747
1748         CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
1749                   ("scsi_scan_lun\n"));
1750
1751         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1752         cpi.ccb_h.func_code = XPT_PATH_INQ;
1753         xpt_action((union ccb *)&cpi);
1754
1755         if (cpi.ccb_h.status != CAM_REQ_CMP) {
1756                 if (request_ccb != NULL) {
1757                         request_ccb->ccb_h.status = cpi.ccb_h.status;
1758                         xpt_done(request_ccb);
1759                 }
1760                 return;
1761         }
1762
1763         if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) {
1764                 /*
1765                  * Can't scan the bus on an adapter that
1766                  * cannot perform the initiator role.
1767                  */
1768                 if (request_ccb != NULL) {
1769                         request_ccb->ccb_h.status = CAM_REQ_CMP;
1770                         xpt_done(request_ccb);
1771                 }
1772                 return;
1773         }
1774
1775         if (request_ccb == NULL) {
1776                 request_ccb = malloc(sizeof(union ccb), M_CAMXPT, M_NOWAIT);
1777                 if (request_ccb == NULL) {
1778                         xpt_print(path, "scsi_scan_lun: can't allocate CCB, "
1779                             "can't continue\n");
1780                         return;
1781                 }
1782                 new_path = malloc(sizeof(*new_path), M_CAMXPT, M_NOWAIT);
1783                 if (new_path == NULL) {
1784                         xpt_print(path, "scsi_scan_lun: can't allocate path, "
1785                             "can't continue\n");
1786                         free(request_ccb, M_CAMXPT);
1787                         return;
1788                 }
1789                 status = xpt_compile_path(new_path, xpt_periph,
1790                                           path->bus->path_id,
1791                                           path->target->target_id,
1792                                           path->device->lun_id);
1793
1794                 if (status != CAM_REQ_CMP) {
1795                         xpt_print(path, "scsi_scan_lun: can't compile path, "
1796                             "can't continue\n");
1797                         free(request_ccb, M_CAMXPT);
1798                         free(new_path, M_CAMXPT);
1799                         return;
1800                 }
1801                 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1);
1802                 request_ccb->ccb_h.cbfcnp = xptscandone;
1803                 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
1804                 request_ccb->crcn.flags = flags;
1805         }
1806
1807         if ((old_periph = cam_periph_find(path, "probe")) != NULL) {
1808                 probe_softc *softc;
1809
1810                 softc = (probe_softc *)old_periph->softc;
1811                 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
1812                                   periph_links.tqe);
1813         } else {
1814                 status = cam_periph_alloc(proberegister, NULL, probecleanup,
1815                                           probestart, "probe",
1816                                           CAM_PERIPH_BIO,
1817                                           request_ccb->ccb_h.path, NULL, 0,
1818                                           request_ccb);
1819
1820                 if (status != CAM_REQ_CMP) {
1821                         xpt_print(path, "scsi_scan_lun: cam_alloc_periph "
1822                             "returned an error, can't continue probe\n");
1823                         request_ccb->ccb_h.status = status;
1824                         xpt_done(request_ccb);
1825                 }
1826         }
1827 }
1828
1829 static void
1830 xptscandone(struct cam_periph *periph, union ccb *done_ccb)
1831 {
1832         xpt_release_path(done_ccb->ccb_h.path);
1833         free(done_ccb->ccb_h.path, M_CAMXPT);
1834         free(done_ccb, M_CAMXPT);
1835 }
1836
1837 static struct cam_ed *
1838 scsi_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
1839 {
1840         struct cam_path path;
1841         struct scsi_quirk_entry *quirk;
1842         struct cam_ed *device;
1843         struct cam_ed *cur_device;
1844
1845         device = xpt_alloc_device(bus, target, lun_id);
1846         if (device == NULL)
1847                 return (NULL);
1848
1849         /*
1850          * Take the default quirk entry until we have inquiry
1851          * data and can determine a better quirk to use.
1852          */
1853         quirk = &scsi_quirk_table[scsi_quirk_table_size - 1];
1854         device->quirk = (void *)quirk;
1855         device->mintags = quirk->mintags;
1856         device->maxtags = quirk->maxtags;
1857         bzero(&device->inq_data, sizeof(device->inq_data));
1858         device->inq_flags = 0;
1859         device->queue_flags = 0;
1860         device->serial_num = NULL;
1861         device->serial_num_len = 0;
1862
1863         /*
1864          * XXX should be limited by number of CCBs this bus can
1865          * do.
1866          */
1867         bus->sim->max_ccbs += device->ccbq.devq_openings;
1868         /* Insertion sort into our target's device list */
1869         cur_device = TAILQ_FIRST(&target->ed_entries);
1870         while (cur_device != NULL && cur_device->lun_id < lun_id)
1871                 cur_device = TAILQ_NEXT(cur_device, links);
1872         if (cur_device != NULL) {
1873                 TAILQ_INSERT_BEFORE(cur_device, device, links);
1874         } else {
1875                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
1876         }
1877         target->generation++;
1878         if (lun_id != CAM_LUN_WILDCARD) {
1879                 xpt_compile_path(&path,
1880                                  NULL,
1881                                  bus->path_id,
1882                                  target->target_id,
1883                                  lun_id);
1884                 scsi_devise_transport(&path);
1885                 xpt_release_path(&path);
1886         }
1887
1888         return (device);
1889 }
1890
1891 static void
1892 scsi_devise_transport(struct cam_path *path)
1893 {
1894         struct ccb_pathinq cpi;
1895         struct ccb_trans_settings cts;
1896         struct scsi_inquiry_data *inq_buf;
1897
1898         /* Get transport information from the SIM */
1899         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1900         cpi.ccb_h.func_code = XPT_PATH_INQ;
1901         xpt_action((union ccb *)&cpi);
1902
1903         inq_buf = NULL;
1904         if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0)
1905                 inq_buf = &path->device->inq_data;
1906         path->device->protocol = PROTO_SCSI;
1907         path->device->protocol_version =
1908             inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version;
1909         path->device->transport = cpi.transport;
1910         path->device->transport_version = cpi.transport_version;
1911
1912         /*
1913          * Any device not using SPI3 features should
1914          * be considered SPI2 or lower.
1915          */
1916         if (inq_buf != NULL) {
1917                 if (path->device->transport == XPORT_SPI
1918                  && (inq_buf->spi3data & SID_SPI_MASK) == 0
1919                  && path->device->transport_version > 2)
1920                         path->device->transport_version = 2;
1921         } else {
1922                 struct cam_ed* otherdev;
1923
1924                 for (otherdev = TAILQ_FIRST(&path->target->ed_entries);
1925                      otherdev != NULL;
1926                      otherdev = TAILQ_NEXT(otherdev, links)) {
1927                         if (otherdev != path->device)
1928                                 break;
1929                 }
1930
1931                 if (otherdev != NULL) {
1932                         /*
1933                          * Initially assume the same versioning as
1934                          * prior luns for this target.
1935                          */
1936                         path->device->protocol_version =
1937                             otherdev->protocol_version;
1938                         path->device->transport_version =
1939                             otherdev->transport_version;
1940                 } else {
1941                         /* Until we know better, opt for safty */
1942                         path->device->protocol_version = 2;
1943                         if (path->device->transport == XPORT_SPI)
1944                                 path->device->transport_version = 2;
1945                         else
1946                                 path->device->transport_version = 0;
1947                 }
1948         }
1949
1950         /*
1951          * XXX
1952          * For a device compliant with SPC-2 we should be able
1953          * to determine the transport version supported by
1954          * scrutinizing the version descriptors in the
1955          * inquiry buffer.
1956          */
1957
1958         /* Tell the controller what we think */
1959         xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
1960         cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
1961         cts.type = CTS_TYPE_CURRENT_SETTINGS;
1962         cts.transport = path->device->transport;
1963         cts.transport_version = path->device->transport_version;
1964         cts.protocol = path->device->protocol;
1965         cts.protocol_version = path->device->protocol_version;
1966         cts.proto_specific.valid = 0;
1967         cts.xport_specific.valid = 0;
1968         xpt_action((union ccb *)&cts);
1969 }
1970
1971 static void
1972 scsi_action(union ccb *start_ccb)
1973 {
1974
1975         switch (start_ccb->ccb_h.func_code) {
1976         case XPT_SET_TRAN_SETTINGS:
1977         {
1978                 scsi_set_transfer_settings(&start_ccb->cts,
1979                                            start_ccb->ccb_h.path->device,
1980                                            /*async_update*/FALSE);
1981                 break;
1982         }
1983         case XPT_SCAN_BUS:
1984                 scsi_scan_bus(start_ccb->ccb_h.path->periph, start_ccb);
1985                 break;
1986         case XPT_SCAN_LUN:
1987                 scsi_scan_lun(start_ccb->ccb_h.path->periph,
1988                               start_ccb->ccb_h.path, start_ccb->crcn.flags,
1989                               start_ccb);
1990                 break;
1991         case XPT_GET_TRAN_SETTINGS:
1992         {
1993                 struct cam_sim *sim;
1994
1995                 sim = start_ccb->ccb_h.path->bus->sim;
1996                 (*(sim->sim_action))(sim, start_ccb);
1997                 break;
1998         }
1999         default:
2000                 xpt_action_default(start_ccb);
2001                 break;
2002         }
2003 }
2004
2005 static void
2006 scsi_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device,
2007                            int async_update)
2008 {
2009         struct  ccb_pathinq cpi;
2010         struct  ccb_trans_settings cur_cts;
2011         struct  ccb_trans_settings_scsi *scsi;
2012         struct  ccb_trans_settings_scsi *cur_scsi;
2013         struct  cam_sim *sim;
2014         struct  scsi_inquiry_data *inq_data;
2015
2016         if (device == NULL) {
2017                 cts->ccb_h.status = CAM_PATH_INVALID;
2018                 xpt_done((union ccb *)cts);
2019                 return;
2020         }
2021
2022         if (cts->protocol == PROTO_UNKNOWN
2023          || cts->protocol == PROTO_UNSPECIFIED) {
2024                 cts->protocol = device->protocol;
2025                 cts->protocol_version = device->protocol_version;
2026         }
2027
2028         if (cts->protocol_version == PROTO_VERSION_UNKNOWN
2029          || cts->protocol_version == PROTO_VERSION_UNSPECIFIED)
2030                 cts->protocol_version = device->protocol_version;
2031
2032         if (cts->protocol != device->protocol) {
2033                 xpt_print(cts->ccb_h.path, "Uninitialized Protocol %x:%x?\n",
2034                        cts->protocol, device->protocol);
2035                 cts->protocol = device->protocol;
2036         }
2037
2038         if (cts->protocol_version > device->protocol_version) {
2039                 if (bootverbose) {
2040                         xpt_print(cts->ccb_h.path, "Down reving Protocol "
2041                             "Version from %d to %d?\n", cts->protocol_version,
2042                             device->protocol_version);
2043                 }
2044                 cts->protocol_version = device->protocol_version;
2045         }
2046
2047         if (cts->transport == XPORT_UNKNOWN
2048          || cts->transport == XPORT_UNSPECIFIED) {
2049                 cts->transport = device->transport;
2050                 cts->transport_version = device->transport_version;
2051         }
2052
2053         if (cts->transport_version == XPORT_VERSION_UNKNOWN
2054          || cts->transport_version == XPORT_VERSION_UNSPECIFIED)
2055                 cts->transport_version = device->transport_version;
2056
2057         if (cts->transport != device->transport) {
2058                 xpt_print(cts->ccb_h.path, "Uninitialized Transport %x:%x?\n",
2059                     cts->transport, device->transport);
2060                 cts->transport = device->transport;
2061         }
2062
2063         if (cts->transport_version > device->transport_version) {
2064                 if (bootverbose) {
2065                         xpt_print(cts->ccb_h.path, "Down reving Transport "
2066                             "Version from %d to %d?\n", cts->transport_version,
2067                             device->transport_version);
2068                 }
2069                 cts->transport_version = device->transport_version;
2070         }
2071
2072         sim = cts->ccb_h.path->bus->sim;
2073
2074         /*
2075          * Nothing more of interest to do unless
2076          * this is a device connected via the
2077          * SCSI protocol.
2078          */
2079         if (cts->protocol != PROTO_SCSI) {
2080                 if (async_update == FALSE)
2081                         (*(sim->sim_action))(sim, (union ccb *)cts);
2082                 return;
2083         }
2084
2085         inq_data = &device->inq_data;
2086         scsi = &cts->proto_specific.scsi;
2087         xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1);
2088         cpi.ccb_h.func_code = XPT_PATH_INQ;
2089         xpt_action((union ccb *)&cpi);
2090
2091         /* SCSI specific sanity checking */
2092         if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0
2093          || (INQ_DATA_TQ_ENABLED(inq_data)) == 0
2094          || (device->queue_flags & SCP_QUEUE_DQUE) != 0
2095          || (device->mintags == 0)) {
2096                 /*
2097                  * Can't tag on hardware that doesn't support tags,
2098                  * doesn't have it enabled, or has broken tag support.
2099                  */
2100                 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
2101         }
2102
2103         if (async_update == FALSE) {
2104                 /*
2105                  * Perform sanity checking against what the
2106                  * controller and device can do.
2107                  */
2108                 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1);
2109                 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
2110                 cur_cts.type = cts->type;
2111                 xpt_action((union ccb *)&cur_cts);
2112                 if ((cur_cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
2113                         return;
2114                 }
2115                 cur_scsi = &cur_cts.proto_specific.scsi;
2116                 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) {
2117                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
2118                         scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB;
2119                 }
2120                 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0)
2121                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
2122         }
2123
2124         /* SPI specific sanity checking */
2125         if (cts->transport == XPORT_SPI && async_update == FALSE) {
2126                 u_int spi3caps;
2127                 struct ccb_trans_settings_spi *spi;
2128                 struct ccb_trans_settings_spi *cur_spi;
2129
2130                 spi = &cts->xport_specific.spi;
2131
2132                 cur_spi = &cur_cts.xport_specific.spi;
2133
2134                 /* Fill in any gaps in what the user gave us */
2135                 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
2136                         spi->sync_period = cur_spi->sync_period;
2137                 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
2138                         spi->sync_period = 0;
2139                 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
2140                         spi->sync_offset = cur_spi->sync_offset;
2141                 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
2142                         spi->sync_offset = 0;
2143                 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
2144                         spi->ppr_options = cur_spi->ppr_options;
2145                 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
2146                         spi->ppr_options = 0;
2147                 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
2148                         spi->bus_width = cur_spi->bus_width;
2149                 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
2150                         spi->bus_width = 0;
2151                 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) {
2152                         spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
2153                         spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB;
2154                 }
2155                 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0)
2156                         spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
2157                 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
2158                   && (inq_data->flags & SID_Sync) == 0
2159                   && cts->type == CTS_TYPE_CURRENT_SETTINGS)
2160                  || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)) {
2161                         /* Force async */
2162                         spi->sync_period = 0;
2163                         spi->sync_offset = 0;
2164                 }
2165
2166                 switch (spi->bus_width) {
2167                 case MSG_EXT_WDTR_BUS_32_BIT:
2168                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
2169                           || (inq_data->flags & SID_WBus32) != 0
2170                           || cts->type == CTS_TYPE_USER_SETTINGS)
2171                          && (cpi.hba_inquiry & PI_WIDE_32) != 0)
2172                                 break;
2173                         /* Fall Through to 16-bit */
2174                 case MSG_EXT_WDTR_BUS_16_BIT:
2175                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
2176                           || (inq_data->flags & SID_WBus16) != 0
2177                           || cts->type == CTS_TYPE_USER_SETTINGS)
2178                          && (cpi.hba_inquiry & PI_WIDE_16) != 0) {
2179                                 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
2180                                 break;
2181                         }
2182                         /* Fall Through to 8-bit */
2183                 default: /* New bus width?? */
2184                 case MSG_EXT_WDTR_BUS_8_BIT:
2185                         /* All targets can do this */
2186                         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
2187                         break;
2188                 }
2189
2190                 spi3caps = cpi.xport_specific.spi.ppr_options;
2191                 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
2192                  && cts->type == CTS_TYPE_CURRENT_SETTINGS)
2193                         spi3caps &= inq_data->spi3data;
2194
2195                 if ((spi3caps & SID_SPI_CLOCK_DT) == 0)
2196                         spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ;
2197
2198                 if ((spi3caps & SID_SPI_IUS) == 0)
2199                         spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2200
2201                 if ((spi3caps & SID_SPI_QAS) == 0)
2202                         spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ;
2203
2204                 /* No SPI Transfer settings are allowed unless we are wide */
2205                 if (spi->bus_width == 0)
2206                         spi->ppr_options = 0;
2207
2208                 if ((spi->valid & CTS_SPI_VALID_DISC)
2209                  && ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0)) {
2210                         /*
2211                          * Can't tag queue without disconnection.
2212                          */
2213                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
2214                         scsi->valid |= CTS_SCSI_VALID_TQ;
2215                 }
2216
2217                 /*
2218                  * If we are currently performing tagged transactions to
2219                  * this device and want to change its negotiation parameters,
2220                  * go non-tagged for a bit to give the controller a chance to
2221                  * negotiate unhampered by tag messages.
2222                  */
2223                 if (cts->type == CTS_TYPE_CURRENT_SETTINGS
2224                  && (device->inq_flags & SID_CmdQue) != 0
2225                  && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
2226                  && (spi->flags & (CTS_SPI_VALID_SYNC_RATE|
2227                                    CTS_SPI_VALID_SYNC_OFFSET|
2228                                    CTS_SPI_VALID_BUS_WIDTH)) != 0)
2229                         scsi_toggle_tags(cts->ccb_h.path);
2230         }
2231
2232         if (cts->type == CTS_TYPE_CURRENT_SETTINGS
2233          && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) {
2234                 int device_tagenb;
2235
2236                 /*
2237                  * If we are transitioning from tags to no-tags or
2238                  * vice-versa, we need to carefully freeze and restart
2239                  * the queue so that we don't overlap tagged and non-tagged
2240                  * commands.  We also temporarily stop tags if there is
2241                  * a change in transfer negotiation settings to allow
2242                  * "tag-less" negotiation.
2243                  */
2244                 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
2245                  || (device->inq_flags & SID_CmdQue) != 0)
2246                         device_tagenb = TRUE;
2247                 else
2248                         device_tagenb = FALSE;
2249
2250                 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
2251                   && device_tagenb == FALSE)
2252                  || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0
2253                   && device_tagenb == TRUE)) {
2254
2255                         if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) {
2256                                 /*
2257                                  * Delay change to use tags until after a
2258                                  * few commands have gone to this device so
2259                                  * the controller has time to perform transfer
2260                                  * negotiations without tagged messages getting
2261                                  * in the way.
2262                                  */
2263                                 device->tag_delay_count = CAM_TAG_DELAY_COUNT;
2264                                 device->flags |= CAM_DEV_TAG_AFTER_COUNT;
2265                         } else {
2266                                 struct ccb_relsim crs;
2267
2268                                 xpt_freeze_devq(cts->ccb_h.path, /*count*/1);
2269                                 device->inq_flags &= ~SID_CmdQue;
2270                                 xpt_dev_ccbq_resize(cts->ccb_h.path,
2271                                                     sim->max_dev_openings);
2272                                 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
2273                                 device->tag_delay_count = 0;
2274
2275                                 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path,
2276                                               /*priority*/1);
2277                                 crs.ccb_h.func_code = XPT_REL_SIMQ;
2278                                 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
2279                                 crs.openings
2280                                     = crs.release_timeout
2281                                     = crs.qfrozen_cnt
2282                                     = 0;
2283                                 xpt_action((union ccb *)&crs);
2284                         }
2285                 }
2286         }
2287         if (async_update == FALSE)
2288                 (*(sim->sim_action))(sim, (union ccb *)cts);
2289 }
2290
2291 static void
2292 scsi_toggle_tags(struct cam_path *path)
2293 {
2294         struct cam_ed *dev;
2295
2296         /*
2297          * Give controllers a chance to renegotiate
2298          * before starting tag operations.  We
2299          * "toggle" tagged queuing off then on
2300          * which causes the tag enable command delay
2301          * counter to come into effect.
2302          */
2303         dev = path->device;
2304         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
2305          || ((dev->inq_flags & SID_CmdQue) != 0
2306           && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) {
2307                 struct ccb_trans_settings cts;
2308
2309                 xpt_setup_ccb(&cts.ccb_h, path, 1);
2310                 cts.protocol = PROTO_SCSI;
2311                 cts.protocol_version = PROTO_VERSION_UNSPECIFIED;
2312                 cts.transport = XPORT_UNSPECIFIED;
2313                 cts.transport_version = XPORT_VERSION_UNSPECIFIED;
2314                 cts.proto_specific.scsi.flags = 0;
2315                 cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ;
2316                 scsi_set_transfer_settings(&cts, path->device,
2317                                           /*async_update*/TRUE);
2318                 cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB;
2319                 scsi_set_transfer_settings(&cts, path->device,
2320                                           /*async_update*/TRUE);
2321         }
2322 }
2323
2324 /*
2325  * Handle any per-device event notifications that require action by the XPT.
2326  */
2327 static void
2328 scsi_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target,
2329               struct cam_ed *device, void *async_arg)
2330 {
2331         cam_status status;
2332         struct cam_path newpath;
2333
2334         /*
2335          * We only need to handle events for real devices.
2336          */
2337         if (target->target_id == CAM_TARGET_WILDCARD
2338          || device->lun_id == CAM_LUN_WILDCARD)
2339                 return;
2340
2341         /*
2342          * We need our own path with wildcards expanded to
2343          * handle certain types of events.
2344          */
2345         if ((async_code == AC_SENT_BDR)
2346          || (async_code == AC_BUS_RESET)
2347          || (async_code == AC_INQ_CHANGED))
2348                 status = xpt_compile_path(&newpath, NULL,
2349                                           bus->path_id,
2350                                           target->target_id,
2351                                           device->lun_id);
2352         else
2353                 status = CAM_REQ_CMP_ERR;
2354
2355         if (status == CAM_REQ_CMP) {
2356
2357                 /*
2358                  * Allow transfer negotiation to occur in a
2359                  * tag free environment.
2360                  */
2361                 if (async_code == AC_SENT_BDR
2362                  || async_code == AC_BUS_RESET)
2363                         scsi_toggle_tags(&newpath);
2364
2365                 if (async_code == AC_INQ_CHANGED) {
2366                         /*
2367                          * We've sent a start unit command, or
2368                          * something similar to a device that
2369                          * may have caused its inquiry data to
2370                          * change. So we re-scan the device to
2371                          * refresh the inquiry data for it.
2372                          */
2373                         scsi_scan_lun(newpath.periph, &newpath,
2374                                      CAM_EXPECT_INQ_CHANGE, NULL);
2375                 }
2376                 xpt_release_path(&newpath);
2377         } else if (async_code == AC_LOST_DEVICE) {
2378                 device->flags |= CAM_DEV_UNCONFIGURED;
2379         } else if (async_code == AC_TRANSFER_NEG) {
2380                 struct ccb_trans_settings *settings;
2381
2382                 settings = (struct ccb_trans_settings *)async_arg;
2383                 scsi_set_transfer_settings(settings, device,
2384                                           /*async_update*/TRUE);
2385         }
2386 }
2387