sys/cam/cam_xpt.c

   1 /*-
   2  * Implementation of the Common Access Method Transport (XPT) layer.
   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_periph.h>
  57 #include <cam/cam_sim.h>
  58 #include <cam/cam_xpt.h>
  59 #include <cam/cam_xpt_sim.h>
  60 #include <cam/cam_xpt_periph.h>
  61 #include <cam/cam_debug.h>
  62
  63 #include <cam/scsi/scsi_all.h>
  64 #include <cam/scsi/scsi_message.h>
  65 #include <cam/scsi/scsi_pass.h>
  66 #include "opt_cam.h"
  67
  68 /* Datastructures internal to the xpt layer */
  69 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
  70
  71 /*
  72  * Definition of an async handler callback block.  These are used to add
  73  * SIMs and peripherals to the async callback lists.
  74  */
  75 struct async_node {
  76         SLIST_ENTRY(async_node) links;
  77         u_int32_t       event_enable;   /* Async Event enables */
  78         void            (*callback)(void *arg, u_int32_t code,
  79                                     struct cam_path *path, void *args);
  80         void            *callback_arg;
  81 };
  82
  83 SLIST_HEAD(async_list, async_node);
  84 SLIST_HEAD(periph_list, cam_periph);
  85 static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq;
  86
  87 /*
  88  * This is the maximum number of high powered commands (e.g. start unit)
  89  * that can be outstanding at a particular time.
  90  */
  91 #ifndef CAM_MAX_HIGHPOWER
  92 #define CAM_MAX_HIGHPOWER  4
  93 #endif
  94
  95 /* number of high powered commands that can go through right now */
  96 static int num_highpower = CAM_MAX_HIGHPOWER;
  97
  98 /*
  99  * Structure for queueing a device in a run queue.
 100  * There is one run queue for allocating new ccbs,
 101  * and another for sending ccbs to the controller.
 102  */
 103 struct cam_ed_qinfo {
 104         cam_pinfo pinfo;
 105         struct    cam_ed *device;
 106 };
 107
 108 /*
 109  * The CAM EDT (Existing Device Table) contains the device information for
 110  * all devices for all busses in the system.  The table contains a
 111  * cam_ed structure for each device on the bus.
 112  */
 113 struct cam_ed {
 114         TAILQ_ENTRY(cam_ed) links;
 115         struct  cam_ed_qinfo alloc_ccb_entry;
 116         struct  cam_ed_qinfo send_ccb_entry;
 117         struct  cam_et   *target;
 118         lun_id_t         lun_id;
 119         struct  camq drvq;              /*
 120                                          * Queue of type drivers wanting to do
 121                                          * work on this device.
 122                                          */
 123         struct  cam_ccbq ccbq;          /* Queue of pending ccbs */
 124         struct  async_list asyncs;      /* Async callback info for this B/T/L */
 125         struct  periph_list periphs;    /* All attached devices */
 126         u_int   generation;             /* Generation number */
 127         struct  cam_periph *owner;      /* Peripheral driver's ownership tag */
 128         struct  xpt_quirk_entry *quirk; /* Oddities about this device */
 129                                         /* Storage for the inquiry data */
 130 #ifdef CAM_NEW_TRAN_CODE
 131         cam_proto        protocol;
 132         u_int            protocol_version;
 133         cam_xport        transport;
 134         u_int            transport_version;
 135 #endif /* CAM_NEW_TRAN_CODE */
 136         struct           scsi_inquiry_data inq_data;
 137         u_int8_t         inq_flags;     /*
 138                                          * Current settings for inquiry flags.
 139                                          * This allows us to override settings
 140                                          * like disconnection and tagged
 141                                          * queuing for a device.
 142                                          */
 143         u_int8_t         queue_flags;   /* Queue flags from the control page */
 144         u_int8_t         serial_num_len;
 145         u_int8_t        *serial_num;
 146         u_int32_t        qfrozen_cnt;
 147         u_int32_t        flags;
 148 #define CAM_DEV_UNCONFIGURED            0x01
 149 #define CAM_DEV_REL_TIMEOUT_PENDING     0x02
 150 #define CAM_DEV_REL_ON_COMPLETE         0x04
 151 #define CAM_DEV_REL_ON_QUEUE_EMPTY      0x08
 152 #define CAM_DEV_RESIZE_QUEUE_NEEDED     0x10
 153 #define CAM_DEV_TAG_AFTER_COUNT         0x20
 154 #define CAM_DEV_INQUIRY_DATA_VALID      0x40
 155         u_int32_t        tag_delay_count;
 156 #define CAM_TAG_DELAY_COUNT             5
 157         u_int32_t        tag_saved_openings;
 158         u_int32_t        refcount;
 159         struct           callout_handle c_handle;
 160 };
 161
 162 /*
 163  * Each target is represented by an ET (Existing Target).  These
 164  * entries are created when a target is successfully probed with an
 165  * identify, and removed when a device fails to respond after a number
 166  * of retries, or a bus rescan finds the device missing.
 167  */
 168 struct cam_et {
 169         TAILQ_HEAD(, cam_ed) ed_entries;
 170         TAILQ_ENTRY(cam_et) links;
 171         struct  cam_eb  *bus;
 172         target_id_t     target_id;
 173         u_int32_t       refcount;
 174         u_int           generation;
 175         struct          timeval last_reset;
 176 };
 177
 178 /*
 179  * Each bus is represented by an EB (Existing Bus).  These entries
 180  * are created by calls to xpt_bus_register and deleted by calls to
 181  * xpt_bus_deregister.
 182  */
 183 struct cam_eb {
 184         TAILQ_HEAD(, cam_et) et_entries;
 185         TAILQ_ENTRY(cam_eb)  links;
 186         path_id_t            path_id;
 187         struct cam_sim       *sim;
 188         struct timeval       last_reset;
 189         u_int32_t            flags;
 190 #define CAM_EB_RUNQ_SCHEDULED   0x01
 191         u_int32_t            refcount;
 192         u_int                generation;
 193 };
 194
 195 struct cam_path {
 196         struct cam_periph *periph;
 197         struct cam_eb     *bus;
 198         struct cam_et     *target;
 199         struct cam_ed     *device;
 200 };
 201
 202 struct xpt_quirk_entry {
 203         struct scsi_inquiry_pattern inq_pat;
 204         u_int8_t quirks;
 205 #define CAM_QUIRK_NOLUNS        0x01
 206 #define CAM_QUIRK_NOSERIAL      0x02
 207 #define CAM_QUIRK_HILUNS        0x04
 208 #define CAM_QUIRK_NOHILUNS      0x08
 209         u_int mintags;
 210         u_int maxtags;
 211 };
 212
 213 static int cam_srch_hi = 0;
 214 TUNABLE_INT("kern.cam.cam_srch_hi", &cam_srch_hi);
 215 static int sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS);
 216 SYSCTL_PROC(_kern_cam, OID_AUTO, cam_srch_hi, CTLTYPE_INT|CTLFLAG_RW, 0, 0,
 217     sysctl_cam_search_luns, "I",
 218     "allow search above LUN 7 for SCSI3 and greater devices");
 219
 220 #define CAM_SCSI2_MAXLUN        8
 221 /*
 222  * If we're not quirked to search <= the first 8 luns
 223  * and we are either quirked to search above lun 8,
 224  * or we're > SCSI-2 and we've enabled hilun searching,
 225  * or we're > SCSI-2 and the last lun was a success,
 226  * we can look for luns above lun 8.
 227  */
 228 #define CAN_SRCH_HI_SPARSE(dv)                          \
 229   (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0)      \
 230   && ((dv->quirk->quirks & CAM_QUIRK_HILUNS)            \
 231   || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2 && cam_srch_hi)))
 232
 233 #define CAN_SRCH_HI_DENSE(dv)                           \
 234   (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0)      \
 235   && ((dv->quirk->quirks & CAM_QUIRK_HILUNS)            \
 236   || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2)))
 237
 238 typedef enum {
 239         XPT_FLAG_OPEN           = 0x01
 240 } xpt_flags;
 241
 242 struct xpt_softc {
 243         xpt_flags       flags;
 244         u_int32_t       generation;
 245 };
 246
 247 static const char quantum[] = "QUANTUM";
 248 static const char sony[] = "SONY";
 249 static const char west_digital[] = "WDIGTL";
 250 static const char samsung[] = "SAMSUNG";
 251 static const char seagate[] = "SEAGATE";
 252 static const char microp[] = "MICROP";
 253
 254 static struct xpt_quirk_entry xpt_quirk_table[] =
 255 {
 256         {
 257                 /* Reports QUEUE FULL for temporary resource shortages */
 258                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" },
 259                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 260         },
 261         {
 262                 /* Reports QUEUE FULL for temporary resource shortages */
 263                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" },
 264                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 265         },
 266         {
 267                 /* Reports QUEUE FULL for temporary resource shortages */
 268                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" },
 269                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 270         },
 271         {
 272                 /* Broken tagged queuing drive */
 273                 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" },
 274                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 275         },
 276         {
 277                 /* Broken tagged queuing drive */
 278                 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" },
 279                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 280         },
 281         {
 282                 /* Broken tagged queuing drive */
 283                 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" },
 284                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 285         },
 286         {
 287                 /*
 288                  * Unfortunately, the Quantum Atlas III has the same
 289                  * problem as the Atlas II drives above.
 290                  * Reported by: "Johan Granlund" <johan@granlund.nu>
 291                  *
 292                  * For future reference, the drive with the problem was:
 293                  * QUANTUM QM39100TD-SW N1B0
 294                  *
 295                  * It's possible that Quantum will fix the problem in later
 296                  * firmware revisions.  If that happens, the quirk entry
 297                  * will need to be made specific to the firmware revisions
 298                  * with the problem.
 299                  *
 300                  */
 301                 /* Reports QUEUE FULL for temporary resource shortages */
 302                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" },
 303                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 304         },
 305         {
 306                 /*
 307                  * 18 Gig Atlas III, same problem as the 9G version.
 308                  * Reported by: Andre Albsmeier
 309                  *              <andre.albsmeier@mchp.siemens.de>
 310                  *
 311                  * For future reference, the drive with the problem was:
 312                  * QUANTUM QM318000TD-S N491
 313                  */
 314                 /* Reports QUEUE FULL for temporary resource shortages */
 315                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" },
 316                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 317         },
 318         {
 319                 /*
 320                  * Broken tagged queuing drive
 321                  * Reported by: Bret Ford <bford@uop.cs.uop.edu>
 322                  *         and: Martin Renters <martin@tdc.on.ca>
 323                  */
 324                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" },
 325                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 326         },
 327                 /*
 328                  * The Seagate Medalist Pro drives have very poor write
 329                  * performance with anything more than 2 tags.
 330                  *
 331                  * Reported by:  Paul van der Zwan <paulz@trantor.xs4all.nl>
 332                  * Drive:  <SEAGATE ST36530N 1444>
 333                  *
 334                  * Reported by:  Jeremy Lea <reg@shale.csir.co.za>
 335                  * Drive:  <SEAGATE ST34520W 1281>
 336                  *
 337                  * No one has actually reported that the 9G version
 338                  * (ST39140*) of the Medalist Pro has the same problem, but
 339                  * we're assuming that it does because the 4G and 6.5G
 340                  * versions of the drive are broken.
 341                  */
 342         {
 343                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"},
 344                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 345         },
 346         {
 347                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"},
 348                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 349         },
 350         {
 351                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"},
 352                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 353         },
 354         {
 355                 /*
 356                  * Slow when tagged queueing is enabled.  Write performance
 357                  * steadily drops off with more and more concurrent
 358                  * transactions.  Best sequential write performance with
 359                  * tagged queueing turned off and write caching turned on.
 360                  *
 361                  * PR:  kern/10398
 362                  * Submitted by:  Hideaki Okada <hokada@isl.melco.co.jp>
 363                  * Drive:  DCAS-34330 w/ "S65A" firmware.
 364                  *
 365                  * The drive with the problem had the "S65A" firmware
 366                  * revision, and has also been reported (by Stephen J.
 367                  * Roznowski <sjr@home.net>) for a drive with the "S61A"
 368                  * firmware revision.
 369                  *
 370                  * Although no one has reported problems with the 2 gig
 371                  * version of the DCAS drive, the assumption is that it
 372                  * has the same problems as the 4 gig version.  Therefore
 373                  * this quirk entries disables tagged queueing for all
 374                  * DCAS drives.
 375                  */
 376                 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" },
 377                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 378         },
 379         {
 380                 /* Broken tagged queuing drive */
 381                 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" },
 382                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 383         },
 384         {
 385                 /* Broken tagged queuing drive */
 386                 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" },
 387                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 388         },
 389         {
 390                 /*
 391                  * Broken tagged queuing drive.
 392                  * Submitted by:
 393                  * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp>
 394                  * in PR kern/9535
 395                  */
 396                 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" },
 397                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 398         },
 399         {
 400                 /*
 401                  * Slow when tagged queueing is enabled. (1.5MB/sec versus
 402                  * 8MB/sec.)
 403                  * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
 404                  * Best performance with these drives is achieved with
 405                  * tagged queueing turned off, and write caching turned on.
 406                  */
 407                 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" },
 408                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 409         },
 410         {
 411                 /*
 412                  * Slow when tagged queueing is enabled. (1.5MB/sec versus
 413                  * 8MB/sec.)
 414                  * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
 415                  * Best performance with these drives is achieved with
 416                  * tagged queueing turned off, and write caching turned on.
 417                  */
 418                 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" },
 419                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 420         },
 421         {
 422                 /*
 423                  * Doesn't handle queue full condition correctly,
 424                  * so we need to limit maxtags to what the device
 425                  * can handle instead of determining this automatically.
 426                  */
 427                 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" },
 428                 /*quirks*/0, /*mintags*/2, /*maxtags*/32
 429         },
 430         {
 431                 /* Really only one LUN */
 432                 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" },
 433                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 434         },
 435         {
 436                 /* I can't believe we need a quirk for DPT volumes. */
 437                 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" },
 438                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS,
 439                 /*mintags*/0, /*maxtags*/255
 440         },
 441         {
 442                 /*
 443                  * Many Sony CDROM drives don't like multi-LUN probing.
 444                  */
 445                 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" },
 446                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 447         },
 448         {
 449                 /*
 450                  * This drive doesn't like multiple LUN probing.
 451                  * Submitted by:  Parag Patel <parag@cgt.com>
 452                  */
 453                 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R   CDU9*", "*" },
 454                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 455         },
 456         {
 457                 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" },
 458                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 459         },
 460         {
 461                 /*
 462                  * The 8200 doesn't like multi-lun probing, and probably
 463                  * don't like serial number requests either.
 464                  */
 465                 {
 466                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
 467                         "EXB-8200*", "*"
 468                 },
 469                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 470         },
 471         {
 472                 /*
 473                  * Let's try the same as above, but for a drive that says
 474                  * it's an IPL-6860 but is actually an EXB 8200.
 475                  */
 476                 {
 477                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
 478                         "IPL-6860*", "*"
 479                 },
 480                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 481         },
 482         {
 483                 /*
 484                  * These Hitachi drives don't like multi-lun probing.
 485                  * The PR submitter has a DK319H, but says that the Linux
 486                  * kernel has a similar work-around for the DK312 and DK314,
 487                  * so all DK31* drives are quirked here.
 488                  * PR:            misc/18793
 489                  * Submitted by:  Paul Haddad <paul@pth.com>
 490                  */
 491                 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" },
 492                 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
 493         },
 494         {
 495                 /*
 496                  * The Hitachi CJ series with J8A8 firmware apparantly has
 497                  * problems with tagged commands.
 498                  * PR: 23536
 499                  * Reported by: amagai@nue.org
 500                  */
 501                 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK32CJ*", "J8A8" },
 502                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 503         },
 504         {
 505                 /*
 506                  * These are the large storage arrays.
 507                  * Submitted by:  William Carrel <william.carrel@infospace.com>
 508                  */
 509                 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "OPEN*", "*" },
 510                 CAM_QUIRK_HILUNS, 2, 1024
 511         },
 512         {
 513                 /*
 514                  * This old revision of the TDC3600 is also SCSI-1, and
 515                  * hangs upon serial number probing.
 516                  */
 517                 {
 518                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 519                         " TDC 3600", "U07:"
 520                 },
 521                 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0
 522         },
 523         {
 524                 /*
 525                  * Maxtor Personal Storage 3000XT (Firewire)
 526                  * hangs upon serial number probing.
 527                  */
 528                 {
 529                         T_DIRECT, SIP_MEDIA_FIXED, "Maxtor",
 530                         "1394 storage", "*"
 531                 },
 532                 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0
 533         },
 534         {
 535                 /*
 536                  * Would repond to all LUNs if asked for.
 537                  */
 538                 {
 539                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER",
 540                         "CP150", "*"
 541                 },
 542                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 543         },
 544         {
 545                 /*
 546                  * Would repond to all LUNs if asked for.
 547                  */
 548                 {
 549                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
 550                         "96X2*", "*"
 551                 },
 552                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 553         },
 554         {
 555                 /* Submitted by: Matthew Dodd <winter@jurai.net> */
 556                 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" },
 557                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 558         },
 559         {
 560                 /* Submitted by: Matthew Dodd <winter@jurai.net> */
 561                 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" },
 562                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 563         },
 564         {
 565                 /* TeraSolutions special settings for TRC-22 RAID */
 566                 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" },
 567                   /*quirks*/0, /*mintags*/55, /*maxtags*/255
 568         },
 569         {
 570                 /* Veritas Storage Appliance */
 571                 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" },
 572                   CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024
 573         },
 574         {
 575                 /*
 576                  * Would respond to all LUNs.  Device type and removable
 577                  * flag are jumper-selectable.
 578                  */
 579                 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix",
 580                   "Tahiti 1", "*"
 581                 },
 582                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 583         },
 584         {
 585                 /* EasyRAID E5A aka. areca ARC-6010 */
 586                 { T_DIRECT, SIP_MEDIA_FIXED, "easyRAID", "*", "*" },
 587                   CAM_QUIRK_NOHILUNS, /*mintags*/2, /*maxtags*/255
 588         },
 589         {
 590                 /* Default tagged queuing parameters for all devices */
 591                 {
 592                   T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED,
 593                   /*vendor*/"*", /*product*/"*", /*revision*/"*"
 594                 },
 595                 /*quirks*/0, /*mintags*/2, /*maxtags*/255
 596         },
 597 };
 598
 599 static const int xpt_quirk_table_size =
 600         sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table);
 601
 602 typedef enum {
 603         DM_RET_COPY             = 0x01,
 604         DM_RET_FLAG_MASK        = 0x0f,
 605         DM_RET_NONE             = 0x00,
 606         DM_RET_STOP             = 0x10,
 607         DM_RET_DESCEND          = 0x20,
 608         DM_RET_ERROR            = 0x30,
 609         DM_RET_ACTION_MASK      = 0xf0
 610 } dev_match_ret;
 611
 612 typedef enum {
 613         XPT_DEPTH_BUS,
 614         XPT_DEPTH_TARGET,
 615         XPT_DEPTH_DEVICE,
 616         XPT_DEPTH_PERIPH
 617 } xpt_traverse_depth;
 618
 619 struct xpt_traverse_config {
 620         xpt_traverse_depth      depth;
 621         void                    *tr_func;
 622         void                    *tr_arg;
 623 };
 624
 625 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 626 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 627 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 628 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 629 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 630
 631 /* Transport layer configuration information */
 632 static struct xpt_softc xsoftc;
 633
 634 /* Queues for our software interrupt handler */
 635 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t;
 636 static cam_isrq_t cam_bioq;
 637 static struct mtx cam_bioq_lock;
 638
 639 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */
 640 static SLIST_HEAD(,ccb_hdr) ccb_freeq;
 641 static u_int xpt_max_ccbs;      /*
 642                                  * Maximum size of ccb pool.  Modified as
 643                                  * devices are added/removed or have their
 644                                  * opening counts changed.
 645                                  */
 646 static u_int xpt_ccb_count;     /* Current count of allocated ccbs */
 647
 648 struct cam_periph *xpt_periph;
 649
 650 static periph_init_t xpt_periph_init;
 651
 652 static periph_init_t probe_periph_init;
 653
 654 static struct periph_driver xpt_driver =
 655 {
 656         xpt_periph_init, "xpt",
 657         TAILQ_HEAD_INITIALIZER(xpt_driver.units)
 658 };
 659
 660 static struct periph_driver probe_driver =
 661 {
 662         probe_periph_init, "probe",
 663         TAILQ_HEAD_INITIALIZER(probe_driver.units)
 664 };
 665
 666 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 667 PERIPHDRIVER_DECLARE(probe, probe_driver);
 668
 669
 670 static d_open_t xptopen;
 671 static d_close_t xptclose;
 672 static d_ioctl_t xptioctl;
 673
 674 static struct cdevsw xpt_cdevsw = {
 675         .d_version =    D_VERSION,
 676         .d_flags =      D_NEEDGIANT,
 677         .d_open =       xptopen,
 678         .d_close =      xptclose,
 679         .d_ioctl =      xptioctl,
 680         .d_name =       "xpt",
 681 };
 682
 683 static struct intr_config_hook *xpt_config_hook;
 684
 685 static void dead_sim_action(struct cam_sim *sim, union ccb *ccb);
 686 static void dead_sim_poll(struct cam_sim *sim);
 687
 688 /* Dummy SIM that is used when the real one has gone. */
 689 static struct cam_sim cam_dead_sim = {
 690         .sim_action =   dead_sim_action,
 691         .sim_poll =     dead_sim_poll,
 692         .sim_name =     "dead_sim",
 693 };
 694
 695 #define SIM_DEAD(sim)   ((sim) == &cam_dead_sim)
 696
 697 /* Registered busses */
 698 static TAILQ_HEAD(,cam_eb) xpt_busses;
 699 static u_int bus_generation;
 700
 701 /* Storage for debugging datastructures */
 702 #ifdef  CAMDEBUG
 703 struct cam_path *cam_dpath;
 704 u_int32_t cam_dflags;
 705 u_int32_t cam_debug_delay;
 706 #endif
 707
 708 /* Pointers to software interrupt handlers */
 709 static void *cambio_ih;
 710
 711 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG)
 712 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS"
 713 #endif
 714
 715 /*
 716  * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG
 717  * enabled.  Also, the user must have either none, or all of CAM_DEBUG_BUS,
 718  * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified.
 719  */
 720 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \
 721     || defined(CAM_DEBUG_LUN)
 722 #ifdef CAMDEBUG
 723 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \
 724     || !defined(CAM_DEBUG_LUN)
 725 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \
 726         and CAM_DEBUG_LUN"
 727 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */
 728 #else /* !CAMDEBUG */
 729 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options"
 730 #endif /* CAMDEBUG */
 731 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */
 732
 733 /* Our boot-time initialization hook */
 734 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 735
 736 static moduledata_t cam_moduledata = {
 737         "cam",
 738         cam_module_event_handler,
 739         NULL
 740 };
 741
 742 static void     xpt_init(void *);
 743
 744 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 745 MODULE_VERSION(cam, 1);
 746
 747
 748 static cam_status       xpt_compile_path(struct cam_path *new_path,
 749                                          struct cam_periph *perph,
 750                                          path_id_t path_id,
 751                                          target_id_t target_id,
 752                                          lun_id_t lun_id);
 753
 754 static void             xpt_release_path(struct cam_path *path);
 755
 756 static void             xpt_async_bcast(struct async_list *async_head,
 757                                         u_int32_t async_code,
 758                                         struct cam_path *path,
 759                                         void *async_arg);
 760 static void             xpt_dev_async(u_int32_t async_code,
 761                                       struct cam_eb *bus,
 762                                       struct cam_et *target,
 763                                       struct cam_ed *device,
 764                                       void *async_arg);
 765 static path_id_t xptnextfreepathid(void);
 766 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 767 static union ccb *xpt_get_ccb(struct cam_ed *device);
 768 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 769                                   u_int32_t new_priority);
 770 static void      xpt_run_dev_allocq(struct cam_eb *bus);
 771 static void      xpt_run_dev_sendq(struct cam_eb *bus);
 772 static timeout_t xpt_release_devq_timeout;
 773 static timeout_t xpt_release_simq_timeout;
 774 static void      xpt_release_bus(struct cam_eb *bus);
 775 static void      xpt_release_devq_device(struct cam_ed *dev, u_int count,
 776                                          int run_queue);
 777 static struct cam_et*
 778                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 779 static void      xpt_release_target(struct cam_eb *bus, struct cam_et *target);
 780 static struct cam_ed*
 781                  xpt_alloc_device(struct cam_eb *bus, struct cam_et *target,
 782                                   lun_id_t lun_id);
 783 static void      xpt_release_device(struct cam_eb *bus, struct cam_et *target,
 784                                     struct cam_ed *device);
 785 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings);
 786 static struct cam_eb*
 787                  xpt_find_bus(path_id_t path_id);
 788 static struct cam_et*
 789                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 790 static struct cam_ed*
 791                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 792 static void      xpt_scan_bus(struct cam_periph *periph, union ccb *ccb);
 793 static void      xpt_scan_lun(struct cam_periph *periph,
 794                               struct cam_path *path, cam_flags flags,
 795                               union ccb *ccb);
 796 static void      xptscandone(struct cam_periph *periph, union ccb *done_ccb);
 797 static xpt_busfunc_t    xptconfigbuscountfunc;
 798 static xpt_busfunc_t    xptconfigfunc;
 799 static void      xpt_config(void *arg);
 800 static xpt_devicefunc_t xptpassannouncefunc;
 801 static void      xpt_finishconfig(struct cam_periph *periph, union ccb *ccb);
 802 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 803 static void      xptpoll(struct cam_sim *sim);
 804 static void      camisr(void *);
 805 #if 0
 806 static void      xptstart(struct cam_periph *periph, union ccb *work_ccb);
 807 static void      xptasync(struct cam_periph *periph,
 808                           u_int32_t code, cam_path *path);
 809 #endif
 810 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 811                                     u_int num_patterns, struct cam_eb *bus);
 812 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 813                                        u_int num_patterns,
 814                                        struct cam_ed *device);
 815 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 816                                        u_int num_patterns,
 817                                        struct cam_periph *periph);
 818 static xpt_busfunc_t    xptedtbusfunc;
 819 static xpt_targetfunc_t xptedttargetfunc;
 820 static xpt_devicefunc_t xptedtdevicefunc;
 821 static xpt_periphfunc_t xptedtperiphfunc;
 822 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 823 static xpt_periphfunc_t xptplistperiphfunc;
 824 static int              xptedtmatch(struct ccb_dev_match *cdm);
 825 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 826 static int              xptbustraverse(struct cam_eb *start_bus,
 827                                        xpt_busfunc_t *tr_func, void *arg);
 828 static int              xpttargettraverse(struct cam_eb *bus,
 829                                           struct cam_et *start_target,
 830                                           xpt_targetfunc_t *tr_func, void *arg);
 831 static int              xptdevicetraverse(struct cam_et *target,
 832                                           struct cam_ed *start_device,
 833                                           xpt_devicefunc_t *tr_func, void *arg);
 834 static int              xptperiphtraverse(struct cam_ed *device,
 835                                           struct cam_periph *start_periph,
 836                                           xpt_periphfunc_t *tr_func, void *arg);
 837 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 838                                         xpt_pdrvfunc_t *tr_func, void *arg);
 839 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 840                                             struct cam_periph *start_periph,
 841                                             xpt_periphfunc_t *tr_func,
 842                                             void *arg);
 843 static xpt_busfunc_t    xptdefbusfunc;
 844 static xpt_targetfunc_t xptdeftargetfunc;
 845 static xpt_devicefunc_t xptdefdevicefunc;
 846 static xpt_periphfunc_t xptdefperiphfunc;
 847 static int              xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg);
 848 #ifdef notusedyet
 849 static int              xpt_for_all_targets(xpt_targetfunc_t *tr_func,
 850                                             void *arg);
 851 #endif
 852 static int              xpt_for_all_devices(xpt_devicefunc_t *tr_func,
 853                                             void *arg);
 854 #ifdef notusedyet
 855 static int              xpt_for_all_periphs(xpt_periphfunc_t *tr_func,
 856                                             void *arg);
 857 #endif
 858 static xpt_devicefunc_t xptsetasyncfunc;
 859 static xpt_busfunc_t    xptsetasyncbusfunc;
 860 static cam_status       xptregister(struct cam_periph *periph,
 861                                     void *arg);
 862 static cam_status       proberegister(struct cam_periph *periph,
 863                                       void *arg);
 864 static void      probeschedule(struct cam_periph *probe_periph);
 865 static void      probestart(struct cam_periph *periph, union ccb *start_ccb);
 866 static void      proberequestdefaultnegotiation(struct cam_periph *periph);
 867 static void      probedone(struct cam_periph *periph, union ccb *done_ccb);
 868 static void      probecleanup(struct cam_periph *periph);
 869 static void      xpt_find_quirk(struct cam_ed *device);
 870 #ifdef CAM_NEW_TRAN_CODE
 871 static void      xpt_devise_transport(struct cam_path *path);
 872 #endif /* CAM_NEW_TRAN_CODE */
 873 static void      xpt_set_transfer_settings(struct ccb_trans_settings *cts,
 874                                            struct cam_ed *device,
 875                                            int async_update);
 876 static void      xpt_toggle_tags(struct cam_path *path);
 877 static void      xpt_start_tags(struct cam_path *path);
 878 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus,
 879                                             struct cam_ed *dev);
 880 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus,
 881                                            struct cam_ed *dev);
 882 static __inline int periph_is_queued(struct cam_periph *periph);
 883 static __inline int device_is_alloc_queued(struct cam_ed *device);
 884 static __inline int device_is_send_queued(struct cam_ed *device);
 885 static __inline int dev_allocq_is_runnable(struct cam_devq *devq);
 886
 887 static __inline int
 888 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev)
 889 {
 890         int retval;
 891
 892         if (dev->ccbq.devq_openings > 0) {
 893                 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) {
 894                         cam_ccbq_resize(&dev->ccbq,
 895                                         dev->ccbq.dev_openings
 896                                         + dev->ccbq.dev_active);
 897                         dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED;
 898                 }
 899                 /*
 900                  * The priority of a device waiting for CCB resources
 901                  * is that of the the highest priority peripheral driver
 902                  * enqueued.
 903                  */
 904                 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue,
 905                                           &dev->alloc_ccb_entry.pinfo,
 906                                           CAMQ_GET_HEAD(&dev->drvq)->priority);
 907         } else {
 908                 retval = 0;
 909         }
 910
 911         return (retval);
 912 }
 913
 914 static __inline int
 915 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev)
 916 {
 917         int     retval;
 918
 919         if (dev->ccbq.dev_openings > 0) {
 920                 /*
 921                  * The priority of a device waiting for controller
 922                  * resources is that of the the highest priority CCB
 923                  * enqueued.
 924                  */
 925                 retval =
 926                     xpt_schedule_dev(&bus->sim->devq->send_queue,
 927                                      &dev->send_ccb_entry.pinfo,
 928                                      CAMQ_GET_HEAD(&dev->ccbq.queue)->priority);
 929         } else {
 930                 retval = 0;
 931         }
 932         return (retval);
 933 }
 934
 935 static __inline int
 936 periph_is_queued(struct cam_periph *periph)
 937 {
 938         return (periph->pinfo.index != CAM_UNQUEUED_INDEX);
 939 }
 940
 941 static __inline int
 942 device_is_alloc_queued(struct cam_ed *device)
 943 {
 944         return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
 945 }
 946
 947 static __inline int
 948 device_is_send_queued(struct cam_ed *device)
 949 {
 950         return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
 951 }
 952
 953 static __inline int
 954 dev_allocq_is_runnable(struct cam_devq *devq)
 955 {
 956         /*
 957          * Have work to do.
 958          * Have space to do more work.
 959          * Allowed to do work.
 960          */
 961         return ((devq->alloc_queue.qfrozen_cnt == 0)
 962              && (devq->alloc_queue.entries > 0)
 963              && (devq->alloc_openings > 0));
 964 }
 965
 966 static void
 967 xpt_periph_init()
 968 {
 969         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 970 }
 971
 972 static void
 973 probe_periph_init()
 974 {
 975 }
 976
 977
 978 static void
 979 xptdone(struct cam_periph *periph, union ccb *done_ccb)
 980 {
 981         /* Caller will release the CCB */
 982         wakeup(&done_ccb->ccb_h.cbfcnp);
 983 }
 984
 985 static int
 986 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 987 {
 988         int unit;
 989
 990         unit = minor(dev) & 0xff;
 991
 992         /*
 993          * Only allow read-write access.
 994          */
 995         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 996                 return(EPERM);
 997
 998         /*
 999          * We don't allow nonblocking access.
1000          */
1001         if ((flags & O_NONBLOCK) != 0) {
1002                 printf("xpt%d: can't do nonblocking access\n", unit);
1003                 return(ENODEV);
1004         }
1005
1006         /*
1007          * We only have one transport layer right now.  If someone accesses
1008          * us via something other than minor number 1, point out their
1009          * mistake.
1010          */
1011         if (unit != 0) {
1012                 printf("xptopen: got invalid xpt unit %d\n", unit);
1013                 return(ENXIO);
1014         }
1015
1016         /* Mark ourselves open */
1017         xsoftc.flags |= XPT_FLAG_OPEN;
1018
1019         return(0);
1020 }
1021
1022 static int
1023 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
1024 {
1025         int unit;
1026
1027         unit = minor(dev) & 0xff;
1028
1029         /*
1030          * We only have one transport layer right now.  If someone accesses
1031          * us via something other than minor number 1, point out their
1032          * mistake.
1033          */
1034         if (unit != 0) {
1035                 printf("xptclose: got invalid xpt unit %d\n", unit);
1036                 return(ENXIO);
1037         }
1038
1039         /* Mark ourselves closed */
1040         xsoftc.flags &= ~XPT_FLAG_OPEN;
1041
1042         return(0);
1043 }
1044
1045 static int
1046 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1047 {
1048         int unit, error;
1049
1050         error = 0;
1051         unit = minor(dev) & 0xff;
1052
1053         /*
1054          * We only have one transport layer right now.  If someone accesses
1055          * us via something other than minor number 1, point out their
1056          * mistake.
1057          */
1058         if (unit != 0) {
1059                 printf("xptioctl: got invalid xpt unit %d\n", unit);
1060                 return(ENXIO);
1061         }
1062
1063         switch(cmd) {
1064         /*
1065          * For the transport layer CAMIOCOMMAND ioctl, we really only want
1066          * to accept CCB types that don't quite make sense to send through a
1067          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
1068          * in the CAM spec.
1069          */
1070         case CAMIOCOMMAND: {
1071                 union ccb *ccb;
1072                 union ccb *inccb;
1073
1074                 inccb = (union ccb *)addr;
1075
1076                 switch(inccb->ccb_h.func_code) {
1077                 case XPT_SCAN_BUS:
1078                 case XPT_RESET_BUS:
1079                         if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD)
1080                          || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) {
1081                                 error = EINVAL;
1082                                 break;
1083                         }
1084                         /* FALLTHROUGH */
1085                 case XPT_PATH_INQ:
1086                 case XPT_ENG_INQ:
1087                 case XPT_SCAN_LUN:
1088
1089                         ccb = xpt_alloc_ccb();
1090
1091                         /*
1092                          * Create a path using the bus, target, and lun the
1093                          * user passed in.
1094                          */
1095                         if (xpt_create_path(&ccb->ccb_h.path, xpt_periph,
1096                                             inccb->ccb_h.path_id,
1097                                             inccb->ccb_h.target_id,
1098                                             inccb->ccb_h.target_lun) !=
1099                                             CAM_REQ_CMP){
1100                                 error = EINVAL;
1101                                 xpt_free_ccb(ccb);
1102                                 break;
1103                         }
1104                         /* Ensure all of our fields are correct */
1105                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
1106                                       inccb->ccb_h.pinfo.priority);
1107                         xpt_merge_ccb(ccb, inccb);
1108                         ccb->ccb_h.cbfcnp = xptdone;
1109                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
1110                         bcopy(ccb, inccb, sizeof(union ccb));
1111                         xpt_free_path(ccb->ccb_h.path);
1112                         xpt_free_ccb(ccb);
1113                         break;
1114
1115                 case XPT_DEBUG: {
1116                         union ccb ccb;
1117
1118                         /*
1119                          * This is an immediate CCB, so it's okay to
1120                          * allocate it on the stack.
1121                          */
1122
1123                         /*
1124                          * Create a path using the bus, target, and lun the
1125                          * user passed in.
1126                          */
1127                         if (xpt_create_path(&ccb.ccb_h.path, xpt_periph,
1128                                             inccb->ccb_h.path_id,
1129                                             inccb->ccb_h.target_id,
1130                                             inccb->ccb_h.target_lun) !=
1131                                             CAM_REQ_CMP){
1132                                 error = EINVAL;
1133                                 break;
1134                         }
1135                         /* Ensure all of our fields are correct */
1136                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
1137                                       inccb->ccb_h.pinfo.priority);
1138                         xpt_merge_ccb(&ccb, inccb);
1139                         ccb.ccb_h.cbfcnp = xptdone;
1140                         xpt_action(&ccb);
1141                         bcopy(&ccb, inccb, sizeof(union ccb));
1142                         xpt_free_path(ccb.ccb_h.path);
1143                         break;
1144
1145                 }
1146                 case XPT_DEV_MATCH: {
1147                         struct cam_periph_map_info mapinfo;
1148                         struct cam_path *old_path;
1149
1150                         /*
1151                          * We can't deal with physical addresses for this
1152                          * type of transaction.
1153                          */
1154                         if (inccb->ccb_h.flags & CAM_DATA_PHYS) {
1155                                 error = EINVAL;
1156                                 break;
1157                         }
1158
1159                         /*
1160                          * Save this in case the caller had it set to
1161                          * something in particular.
1162                          */
1163                         old_path = inccb->ccb_h.path;
1164
1165                         /*
1166                          * We really don't need a path for the matching
1167                          * code.  The path is needed because of the
1168                          * debugging statements in xpt_action().  They
1169                          * assume that the CCB has a valid path.
1170                          */
1171                         inccb->ccb_h.path = xpt_periph->path;
1172
1173                         bzero(&mapinfo, sizeof(mapinfo));
1174
1175                         /*
1176                          * Map the pattern and match buffers into kernel
1177                          * virtual address space.
1178                          */
1179                         error = cam_periph_mapmem(inccb, &mapinfo);
1180
1181                         if (error) {
1182                                 inccb->ccb_h.path = old_path;
1183                                 break;
1184                         }
1185
1186                         /*
1187                          * This is an immediate CCB, we can send it on directly.
1188                          */
1189                         xpt_action(inccb);
1190
1191                         /*
1192                          * Map the buffers back into user space.
1193                          */
1194                         cam_periph_unmapmem(inccb, &mapinfo);
1195
1196                         inccb->ccb_h.path = old_path;
1197
1198                         error = 0;
1199                         break;
1200                 }
1201                 default:
1202                         error = ENOTSUP;
1203                         break;
1204                 }
1205                 break;
1206         }
1207         /*
1208          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
1209          * with the periphal driver name and unit name filled in.  The other
1210          * fields don't really matter as input.  The passthrough driver name
1211          * ("pass"), and unit number are passed back in the ccb.  The current
1212          * device generation number, and the index into the device peripheral
1213          * driver list, and the status are also passed back.  Note that
1214          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
1215          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
1216          * (or rather should be) impossible for the device peripheral driver
1217          * list to change since we look at the whole thing in one pass, and
1218          * we do it with splcam protection.
1219          *
1220          */
1221         case CAMGETPASSTHRU: {
1222                 union ccb *ccb;
1223                 struct cam_periph *periph;
1224                 struct periph_driver **p_drv;
1225                 char   *name;
1226                 u_int unit;
1227                 u_int cur_generation;
1228                 int base_periph_found;
1229                 int splbreaknum;
1230                 int s;
1231
1232                 ccb = (union ccb *)addr;
1233                 unit = ccb->cgdl.unit_number;
1234                 name = ccb->cgdl.periph_name;
1235                 /*
1236                  * Every 100 devices, we want to drop our spl protection to
1237                  * give the software interrupt handler a chance to run.
1238                  * Most systems won't run into this check, but this should
1239                  * avoid starvation in the software interrupt handler in
1240                  * large systems.
1241                  */
1242                 splbreaknum = 100;
1243
1244                 ccb = (union ccb *)addr;
1245
1246                 base_periph_found = 0;
1247
1248                 /*
1249                  * Sanity check -- make sure we don't get a null peripheral
1250                  * driver name.
1251                  */
1252                 if (*ccb->cgdl.periph_name == '\0') {
1253                         error = EINVAL;
1254                         break;
1255                 }
1256
1257                 /* Keep the list from changing while we traverse it */
1258                 s = splcam();
1259 ptstartover:
1260                 cur_generation = xsoftc.generation;
1261
1262                 /* first find our driver in the list of drivers */
1263                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
1264                         if (strcmp((*p_drv)->driver_name, name) == 0)
1265                                 break;
1266
1267                 if (*p_drv == NULL) {
1268                         splx(s);
1269                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1270                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1271                         *ccb->cgdl.periph_name = '\0';
1272                         ccb->cgdl.unit_number = 0;
1273                         error = ENOENT;
1274                         break;
1275                 }
1276
1277                 /*
1278                  * Run through every peripheral instance of this driver
1279                  * and check to see whether it matches the unit passed
1280                  * in by the user.  If it does, get out of the loops and
1281                  * find the passthrough driver associated with that
1282                  * peripheral driver.
1283                  */
1284                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
1285                      periph = TAILQ_NEXT(periph, unit_links)) {
1286
1287                         if (periph->unit_number == unit) {
1288                                 break;
1289                         } else if (--splbreaknum == 0) {
1290                                 splx(s);
1291                                 s = splcam();
1292                                 splbreaknum = 100;
1293                                 if (cur_generation != xsoftc.generation)
1294                                        goto ptstartover;
1295                         }
1296                 }
1297                 /*
1298                  * If we found the peripheral driver that the user passed
1299                  * in, go through all of the peripheral drivers for that
1300                  * particular device and look for a passthrough driver.
1301                  */
1302                 if (periph != NULL) {
1303                         struct cam_ed *device;
1304                         int i;
1305
1306                         base_periph_found = 1;
1307                         device = periph->path->device;
1308                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
1309                              periph != NULL;
1310                              periph = SLIST_NEXT(periph, periph_links), i++) {
1311                                 /*
1312                                  * Check to see whether we have a
1313                                  * passthrough device or not.
1314                                  */
1315                                 if (strcmp(periph->periph_name, "pass") == 0) {
1316                                         /*
1317                                          * Fill in the getdevlist fields.
1318                                          */
1319                                         strcpy(ccb->cgdl.periph_name,
1320                                                periph->periph_name);
1321                                         ccb->cgdl.unit_number =
1322                                                 periph->unit_number;
1323                                         if (SLIST_NEXT(periph, periph_links))
1324                                                 ccb->cgdl.status =
1325                                                         CAM_GDEVLIST_MORE_DEVS;
1326                                         else
1327                                                 ccb->cgdl.status =
1328                                                        CAM_GDEVLIST_LAST_DEVICE;
1329                                         ccb->cgdl.generation =
1330                                                 device->generation;
1331                                         ccb->cgdl.index = i;
1332                                         /*
1333                                          * Fill in some CCB header fields
1334                                          * that the user may want.
1335                                          */
1336                                         ccb->ccb_h.path_id =
1337                                                 periph->path->bus->path_id;
1338                                         ccb->ccb_h.target_id =
1339                                                 periph->path->target->target_id;
1340                                         ccb->ccb_h.target_lun =
1341                                                 periph->path->device->lun_id;
1342                                         ccb->ccb_h.status = CAM_REQ_CMP;
1343                                         break;
1344                                 }
1345                         }
1346                 }
1347
1348                 /*
1349                  * If the periph is null here, one of two things has
1350                  * happened.  The first possibility is that we couldn't
1351                  * find the unit number of the particular peripheral driver
1352                  * that the user is asking about.  e.g. the user asks for
1353                  * the passthrough driver for "da11".  We find the list of
1354                  * "da" peripherals all right, but there is no unit 11.
1355                  * The other possibility is that we went through the list
1356                  * of peripheral drivers attached to the device structure,
1357                  * but didn't find one with the name "pass".  Either way,
1358                  * we return ENOENT, since we couldn't find something.
1359                  */
1360                 if (periph == NULL) {
1361                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1362                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1363                         *ccb->cgdl.periph_name = '\0';
1364                         ccb->cgdl.unit_number = 0;
1365                         error = ENOENT;
1366                         /*
1367                          * It is unfortunate that this is even necessary,
1368                          * but there are many, many clueless users out there.
1369                          * If this is true, the user is looking for the
1370                          * passthrough driver, but doesn't have one in his
1371                          * kernel.
1372                          */
1373                         if (base_periph_found == 1) {
1374                                 printf("xptioctl: pass driver is not in the "
1375                                        "kernel\n");
1376                                 printf("xptioctl: put \"device pass0\" in "
1377                                        "your kernel config file\n");
1378                         }
1379                 }
1380                 splx(s);
1381                 break;
1382                 }
1383         default:
1384                 error = ENOTTY;
1385                 break;
1386         }
1387
1388         return(error);
1389 }
1390
1391 static int
1392 cam_module_event_handler(module_t mod, int what, void *arg)
1393 {
1394         if (what == MOD_LOAD) {
1395                 xpt_init(NULL);
1396         } else if (what == MOD_UNLOAD) {
1397                 return EBUSY;
1398         } else {
1399                 return EOPNOTSUPP;
1400         }
1401
1402         return 0;
1403 }
1404
1405 /* Functions accessed by the peripheral drivers */
1406 static void
1407 xpt_init(dummy)
1408         void *dummy;
1409 {
1410         struct cam_sim *xpt_sim;
1411         struct cam_path *path;
1412         struct cam_devq *devq;
1413         cam_status status;
1414
1415         TAILQ_INIT(&xpt_busses);
1416         TAILQ_INIT(&cam_bioq);
1417         SLIST_INIT(&ccb_freeq);
1418         STAILQ_INIT(&highpowerq);
1419
1420         mtx_init(&cam_bioq_lock, "CAM BIOQ lock", NULL, MTX_DEF);
1421
1422         /*
1423          * The xpt layer is, itself, the equivelent of a SIM.
1424          * Allow 16 ccbs in the ccb pool for it.  This should
1425          * give decent parallelism when we probe busses and
1426          * perform other XPT functions.
1427          */
1428         devq = cam_simq_alloc(16);
1429         xpt_sim = cam_sim_alloc(xptaction,
1430                                 xptpoll,
1431                                 "xpt",
1432                                 /*softc*/NULL,
1433                                 /*unit*/0,
1434                                 /*max_dev_transactions*/0,
1435                                 /*max_tagged_dev_transactions*/0,
1436                                 devq);
1437         xpt_max_ccbs = 16;
1438
1439         xpt_bus_register(xpt_sim, /*bus #*/0);
1440
1441         /*
1442          * Looking at the XPT from the SIM layer, the XPT is
1443          * the equivelent of a peripheral driver.  Allocate
1444          * a peripheral driver entry for us.
1445          */
1446         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
1447                                       CAM_TARGET_WILDCARD,
1448                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
1449                 printf("xpt_init: xpt_create_path failed with status %#x,"
1450                        " failing attach\n", status);
1451                 return;
1452         }
1453
1454         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
1455                          path, NULL, 0, NULL);
1456         xpt_free_path(path);
1457
1458         xpt_sim->softc = xpt_periph;
1459
1460         /*
1461          * Register a callback for when interrupts are enabled.
1462          */
1463         xpt_config_hook =
1464             (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
1465                                               M_TEMP, M_NOWAIT | M_ZERO);
1466         if (xpt_config_hook == NULL) {
1467                 printf("xpt_init: Cannot malloc config hook "
1468                        "- failing attach\n");
1469                 return;
1470         }
1471
1472         xpt_config_hook->ich_func = xpt_config;
1473         if (config_intrhook_establish(xpt_config_hook) != 0) {
1474                 free (xpt_config_hook, M_TEMP);
1475                 printf("xpt_init: config_intrhook_establish failed "
1476                        "- failing attach\n");
1477         }
1478
1479         /* Install our software interrupt handlers */
1480         swi_add(NULL, "cambio", camisr, &cam_bioq, SWI_CAMBIO, 0, &cambio_ih);
1481 }
1482
1483 static cam_status
1484 xptregister(struct cam_periph *periph, void *arg)
1485 {
1486         if (periph == NULL) {
1487                 printf("xptregister: periph was NULL!!\n");
1488                 return(CAM_REQ_CMP_ERR);
1489         }
1490
1491         periph->softc = NULL;
1492
1493         xpt_periph = periph;
1494
1495         return(CAM_REQ_CMP);
1496 }
1497
1498 int32_t
1499 xpt_add_periph(struct cam_periph *periph)
1500 {
1501         struct cam_ed *device;
1502         int32_t  status;
1503         struct periph_list *periph_head;
1504
1505         GIANT_REQUIRED;
1506
1507         device = periph->path->device;
1508
1509         periph_head = &device->periphs;
1510
1511         status = CAM_REQ_CMP;
1512
1513         if (device != NULL) {
1514                 int s;
1515
1516                 /*
1517                  * Make room for this peripheral
1518                  * so it will fit in the queue
1519                  * when it's scheduled to run
1520                  */
1521                 s = splsoftcam();
1522                 status = camq_resize(&device->drvq,
1523                                      device->drvq.array_size + 1);
1524
1525                 device->generation++;
1526
1527                 SLIST_INSERT_HEAD(periph_head, periph, periph_links);
1528
1529                 splx(s);
1530         }
1531
1532         xsoftc.generation++;
1533
1534         return (status);
1535 }
1536
1537 void
1538 xpt_remove_periph(struct cam_periph *periph)
1539 {
1540         struct cam_ed *device;
1541
1542         GIANT_REQUIRED;
1543
1544         device = periph->path->device;
1545
1546         if (device != NULL) {
1547                 int s;
1548                 struct periph_list *periph_head;
1549
1550                 periph_head = &device->periphs;
1551
1552                 /* Release the slot for this peripheral */
1553                 s = splsoftcam();
1554                 camq_resize(&device->drvq, device->drvq.array_size - 1);
1555
1556                 device->generation++;
1557
1558                 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links);
1559
1560                 splx(s);
1561         }
1562
1563         xsoftc.generation++;
1564
1565 }
1566
1567 #ifdef CAM_NEW_TRAN_CODE
1568
1569 void
1570 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1571 {
1572         struct  ccb_pathinq cpi;
1573         struct  ccb_trans_settings cts;
1574         struct  cam_path *path;
1575         u_int   speed;
1576         u_int   freq;
1577         u_int   mb;
1578         int     s;
1579
1580         GIANT_REQUIRED;
1581
1582         path = periph->path;
1583         /*
1584          * To ensure that this is printed in one piece,
1585          * mask out CAM interrupts.
1586          */
1587         s = splsoftcam();
1588         printf("%s%d at %s%d bus %d target %d lun %d\n",
1589                periph->periph_name, periph->unit_number,
1590                path->bus->sim->sim_name,
1591                path->bus->sim->unit_number,
1592                path->bus->sim->bus_id,
1593                path->target->target_id,
1594                path->device->lun_id);
1595         printf("%s%d: ", periph->periph_name, periph->unit_number);
1596         scsi_print_inquiry(&path->device->inq_data);
1597         if (bootverbose && path->device->serial_num_len > 0) {
1598                 /* Don't wrap the screen  - print only the first 60 chars */
1599                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1600                        periph->unit_number, path->device->serial_num);
1601         }
1602         xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
1603         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1604         cts.type = CTS_TYPE_CURRENT_SETTINGS;
1605         xpt_action((union ccb*)&cts);
1606
1607         /* Ask the SIM for its base transfer speed */
1608         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1609         cpi.ccb_h.func_code = XPT_PATH_INQ;
1610         xpt_action((union ccb *)&cpi);
1611
1612         speed = cpi.base_transfer_speed;
1613         freq = 0;
1614         if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) {
1615                 struct  ccb_trans_settings_spi *spi;
1616
1617                 spi = &cts.xport_specific.spi;
1618                 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0
1619                   && spi->sync_offset != 0) {
1620                         freq = scsi_calc_syncsrate(spi->sync_period);
1621                         speed = freq;
1622                 }
1623
1624                 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0)
1625                         speed *= (0x01 << spi->bus_width);
1626         }
1627
1628         if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) {
1629                 struct  ccb_trans_settings_fc *fc = &cts.xport_specific.fc;
1630                 if (fc->valid & CTS_FC_VALID_SPEED) {
1631                         speed = fc->bitrate;
1632                 }
1633         }
1634
1635         if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SAS) {
1636                 struct  ccb_trans_settings_sas *sas = &cts.xport_specific.sas;
1637                 if (sas->valid & CTS_SAS_VALID_SPEED) {
1638                         speed = sas->bitrate;
1639                 }
1640         }
1641
1642         mb = speed / 1000;
1643         if (mb > 0)
1644                 printf("%s%d: %d.%03dMB/s transfers",
1645                        periph->periph_name, periph->unit_number,
1646                        mb, speed % 1000);
1647         else
1648                 printf("%s%d: %dKB/s transfers", periph->periph_name,
1649                        periph->unit_number, speed);
1650         /* Report additional information about SPI connections */
1651         if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) {
1652                 struct  ccb_trans_settings_spi *spi;
1653
1654                 spi = &cts.xport_specific.spi;
1655                 if (freq != 0) {
1656                         printf(" (%d.%03dMHz%s, offset %d", freq / 1000,
1657                                freq % 1000,
1658                                (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0
1659                              ? " DT" : "",
1660                                spi->sync_offset);
1661                 }
1662                 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0
1663                  && spi->bus_width > 0) {
1664                         if (freq != 0) {
1665                                 printf(", ");
1666                         } else {
1667                                 printf(" (");
1668                         }
1669                         printf("%dbit)", 8 * (0x01 << spi->bus_width));
1670                 } else if (freq != 0) {
1671                         printf(")");
1672                 }
1673         }
1674         if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) {
1675                 struct  ccb_trans_settings_fc *fc;
1676
1677                 fc = &cts.xport_specific.fc;
1678                 if (fc->valid & CTS_FC_VALID_WWNN)
1679                         printf(" WWNN 0x%llx", (long long) fc->wwnn);
1680                 if (fc->valid & CTS_FC_VALID_WWPN)
1681                         printf(" WWPN 0x%llx", (long long) fc->wwpn);
1682                 if (fc->valid & CTS_FC_VALID_PORT)
1683                         printf(" PortID 0x%x", fc->port);
1684         }
1685
1686         if (path->device->inq_flags & SID_CmdQue
1687          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1688                 printf("\n%s%d: Tagged Queueing Enabled",
1689                        periph->periph_name, periph->unit_number);
1690         }
1691         printf("\n");
1692
1693         /*
1694          * We only want to print the caller's announce string if they've
1695          * passed one in..
1696          */
1697         if (announce_string != NULL)
1698                 printf("%s%d: %s\n", periph->periph_name,
1699                        periph->unit_number, announce_string);
1700         splx(s);
1701 }
1702 #else /* CAM_NEW_TRAN_CODE */
1703 void
1704 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1705 {
1706         int s;
1707         u_int mb;
1708         struct cam_path *path;
1709         struct ccb_trans_settings cts;
1710
1711         GIANT_REQUIRED;
1712
1713         path = periph->path;
1714         /*
1715          * To ensure that this is printed in one piece,
1716          * mask out CAM interrupts.
1717          */
1718         s = splsoftcam();
1719         printf("%s%d at %s%d bus %d target %d lun %d\n",
1720                periph->periph_name, periph->unit_number,
1721                path->bus->sim->sim_name,
1722                path->bus->sim->unit_number,
1723                path->bus->sim->bus_id,
1724                path->target->target_id,
1725                path->device->lun_id);
1726         printf("%s%d: ", periph->periph_name, periph->unit_number);
1727         scsi_print_inquiry(&path->device->inq_data);
1728         if ((bootverbose)
1729          && (path->device->serial_num_len > 0)) {
1730                 /* Don't wrap the screen  - print only the first 60 chars */
1731                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1732                        periph->unit_number, path->device->serial_num);
1733         }
1734         xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
1735         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1736         cts.flags = CCB_TRANS_CURRENT_SETTINGS;
1737         xpt_action((union ccb*)&cts);
1738         if (cts.ccb_h.status == CAM_REQ_CMP) {
1739                 u_int speed;
1740                 u_int freq;
1741
1742                 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1743                   && cts.sync_offset != 0) {
1744                         freq = scsi_calc_syncsrate(cts.sync_period);
1745                         speed = freq;
1746                 } else {
1747                         struct ccb_pathinq cpi;
1748
1749                         /* Ask the SIM for its base transfer speed */
1750                         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1751                         cpi.ccb_h.func_code = XPT_PATH_INQ;
1752                         xpt_action((union ccb *)&cpi);
1753
1754                         speed = cpi.base_transfer_speed;
1755                         freq = 0;
1756                 }
1757                 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0)
1758                         speed *= (0x01 << cts.bus_width);
1759                 mb = speed / 1000;
1760                 if (mb > 0)
1761                         printf("%s%d: %d.%03dMB/s transfers",
1762                                periph->periph_name, periph->unit_number,
1763                                mb, speed % 1000);
1764                 else
1765                         printf("%s%d: %dKB/s transfers", periph->periph_name,
1766                                periph->unit_number, speed);
1767                 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1768                  && cts.sync_offset != 0) {
1769                         printf(" (%d.%03dMHz, offset %d", freq / 1000,
1770                                freq % 1000, cts.sync_offset);
1771                 }
1772                 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0
1773                  && cts.bus_width > 0) {
1774                         if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1775                          && cts.sync_offset != 0) {
1776                                 printf(", ");
1777                         } else {
1778                                 printf(" (");
1779                         }
1780                         printf("%dbit)", 8 * (0x01 << cts.bus_width));
1781                 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1782                         && cts.sync_offset != 0) {
1783                         printf(")");
1784                 }
1785
1786                 if (path->device->inq_flags & SID_CmdQue
1787                  || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1788                         printf(", Tagged Queueing Enabled");
1789                 }
1790
1791                 printf("\n");
1792         } else if (path->device->inq_flags & SID_CmdQue
1793                 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1794                 printf("%s%d: Tagged Queueing Enabled\n",
1795                        periph->periph_name, periph->unit_number);
1796         }
1797
1798         /*
1799          * We only want to print the caller's announce string if they've
1800          * passed one in..
1801          */
1802         if (announce_string != NULL)
1803                 printf("%s%d: %s\n", periph->periph_name,
1804                        periph->unit_number, announce_string);
1805         splx(s);
1806 }
1807
1808 #endif /* CAM_NEW_TRAN_CODE */
1809
1810 static dev_match_ret
1811 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1812             struct cam_eb *bus)
1813 {
1814         dev_match_ret retval;
1815         int i;
1816
1817         retval = DM_RET_NONE;
1818
1819         /*
1820          * If we aren't given something to match against, that's an error.
1821          */
1822         if (bus == NULL)
1823                 return(DM_RET_ERROR);
1824
1825         /*
1826          * If there are no match entries, then this bus matches no
1827          * matter what.
1828          */
1829         if ((patterns == NULL) || (num_patterns == 0))
1830                 return(DM_RET_DESCEND | DM_RET_COPY);
1831
1832         for (i = 0; i < num_patterns; i++) {
1833                 struct bus_match_pattern *cur_pattern;
1834
1835                 /*
1836                  * If the pattern in question isn't for a bus node, we
1837                  * aren't interested.  However, we do indicate to the
1838                  * calling routine that we should continue descending the
1839                  * tree, since the user wants to match against lower-level
1840                  * EDT elements.
1841                  */
1842                 if (patterns[i].type != DEV_MATCH_BUS) {
1843                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1844                                 retval |= DM_RET_DESCEND;
1845                         continue;
1846                 }
1847
1848                 cur_pattern = &patterns[i].pattern.bus_pattern;
1849
1850                 /*
1851                  * If they want to match any bus node, we give them any
1852                  * device node.
1853                  */
1854                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1855                         /* set the copy flag */
1856                         retval |= DM_RET_COPY;
1857
1858                         /*
1859                          * If we've already decided on an action, go ahead
1860                          * and return.
1861                          */
1862                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1863                                 return(retval);
1864                 }
1865
1866                 /*
1867                  * Not sure why someone would do this...
1868                  */
1869                 if (cur_pattern->flags == BUS_MATCH_NONE)
1870                         continue;
1871
1872                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1873                  && (cur_pattern->path_id != bus->path_id))
1874                         continue;
1875
1876                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1877                  && (cur_pattern->bus_id != bus->sim->bus_id))
1878                         continue;
1879
1880                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1881                  && (cur_pattern->unit_number != bus->sim->unit_number))
1882                         continue;
1883
1884                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1885                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1886                              DEV_IDLEN) != 0))
1887                         continue;
1888
1889                 /*
1890                  * If we get to this point, the user definitely wants
1891                  * information on this bus.  So tell the caller to copy the
1892                  * data out.
1893                  */
1894                 retval |= DM_RET_COPY;
1895
1896                 /*
1897                  * If the return action has been set to descend, then we
1898                  * know that we've already seen a non-bus matching
1899                  * expression, therefore we need to further descend the tree.
1900                  * This won't change by continuing around the loop, so we
1901                  * go ahead and return.  If we haven't seen a non-bus
1902                  * matching expression, we keep going around the loop until
1903                  * we exhaust the matching expressions.  We'll set the stop
1904                  * flag once we fall out of the loop.
1905                  */
1906                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1907                         return(retval);
1908         }
1909
1910         /*
1911          * If the return action hasn't been set to descend yet, that means
1912          * we haven't seen anything other than bus matching patterns.  So
1913          * tell the caller to stop descending the tree -- the user doesn't
1914          * want to match against lower level tree elements.
1915          */
1916         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1917                 retval |= DM_RET_STOP;
1918
1919         return(retval);
1920 }
1921
1922 static dev_match_ret
1923 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1924                struct cam_ed *device)
1925 {
1926         dev_match_ret retval;
1927         int i;
1928
1929         retval = DM_RET_NONE;
1930
1931         /*
1932          * If we aren't given something to match against, that's an error.
1933          */
1934         if (device == NULL)
1935                 return(DM_RET_ERROR);
1936
1937         /*
1938          * If there are no match entries, then this device matches no
1939          * matter what.
1940          */
1941         if ((patterns == NULL) || (num_patterns == 0))
1942                 return(DM_RET_DESCEND | DM_RET_COPY);
1943
1944         for (i = 0; i < num_patterns; i++) {
1945                 struct device_match_pattern *cur_pattern;
1946
1947                 /*
1948                  * If the pattern in question isn't for a device node, we
1949                  * aren't interested.
1950                  */
1951                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1952                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1953                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1954                                 retval |= DM_RET_DESCEND;
1955                         continue;
1956                 }
1957
1958                 cur_pattern = &patterns[i].pattern.device_pattern;
1959
1960                 /*
1961                  * If they want to match any device node, we give them any
1962                  * device node.
1963                  */
1964                 if (cur_pattern->flags == DEV_MATCH_ANY) {
1965                         /* set the copy flag */
1966                         retval |= DM_RET_COPY;
1967
1968
1969                         /*
1970                          * If we've already decided on an action, go ahead
1971                          * and return.
1972                          */
1973                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1974                                 return(retval);
1975                 }
1976
1977                 /*
1978                  * Not sure why someone would do this...
1979                  */
1980                 if (cur_pattern->flags == DEV_MATCH_NONE)
1981                         continue;
1982
1983                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1984                  && (cur_pattern->path_id != device->target->bus->path_id))
1985                         continue;
1986
1987                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1988                  && (cur_pattern->target_id != device->target->target_id))
1989                         continue;
1990
1991                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1992                  && (cur_pattern->target_lun != device->lun_id))
1993                         continue;
1994
1995                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1996                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1997                                     (caddr_t)&cur_pattern->inq_pat,
1998                                     1, sizeof(cur_pattern->inq_pat),
1999                                     scsi_static_inquiry_match) == NULL))
2000                         continue;
2001
2002                 /*
2003                  * If we get to this point, the user definitely wants
2004                  * information on this device.  So tell the caller to copy
2005                  * the data out.
2006                  */
2007                 retval |= DM_RET_COPY;
2008
2009                 /*
2010                  * If the return action has been set to descend, then we
2011                  * know that we've already seen a peripheral matching
2012                  * expression, therefore we need to further descend the tree.
2013                  * This won't change by continuing around the loop, so we
2014                  * go ahead and return.  If we haven't seen a peripheral
2015                  * matching expression, we keep going around the loop until
2016                  * we exhaust the matching expressions.  We'll set the stop
2017                  * flag once we fall out of the loop.
2018                  */
2019                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
2020                         return(retval);
2021         }
2022
2023         /*
2024          * If the return action hasn't been set to descend yet, that means
2025          * we haven't seen any peripheral matching patterns.  So tell the
2026          * caller to stop descending the tree -- the user doesn't want to
2027          * match against lower level tree elements.
2028          */
2029         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
2030                 retval |= DM_RET_STOP;
2031
2032         return(retval);
2033 }
2034
2035 /*
2036  * Match a single peripheral against any number of match patterns.
2037  */
2038 static dev_match_ret
2039 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
2040                struct cam_periph *periph)
2041 {
2042         dev_match_ret retval;
2043         int i;
2044
2045         /*
2046          * If we aren't given something to match against, that's an error.
2047          */
2048         if (periph == NULL)
2049                 return(DM_RET_ERROR);
2050
2051         /*
2052          * If there are no match entries, then this peripheral matches no
2053          * matter what.
2054          */
2055         if ((patterns == NULL) || (num_patterns == 0))
2056                 return(DM_RET_STOP | DM_RET_COPY);
2057
2058         /*
2059          * There aren't any nodes below a peripheral node, so there's no
2060          * reason to descend the tree any further.
2061          */
2062         retval = DM_RET_STOP;
2063
2064         for (i = 0; i < num_patterns; i++) {
2065                 struct periph_match_pattern *cur_pattern;
2066
2067                 /*
2068                  * If the pattern in question isn't for a peripheral, we
2069                  * aren't interested.
2070                  */
2071                 if (patterns[i].type != DEV_MATCH_PERIPH)
2072                         continue;
2073
2074                 cur_pattern = &patterns[i].pattern.periph_pattern;
2075
2076                 /*
2077                  * If they want to match on anything, then we will do so.
2078                  */
2079                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
2080                         /* set the copy flag */
2081                         retval |= DM_RET_COPY;
2082
2083                         /*
2084                          * We've already set the return action to stop,
2085                          * since there are no nodes below peripherals in
2086                          * the tree.
2087                          */
2088                         return(retval);
2089                 }
2090
2091                 /*
2092                  * Not sure why someone would do this...
2093                  */
2094                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
2095                         continue;
2096
2097                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
2098                  && (cur_pattern->path_id != periph->path->bus->path_id))
2099                         continue;
2100
2101                 /*
2102                  * For the target and lun id's, we have to make sure the
2103                  * target and lun pointers aren't NULL.  The xpt peripheral
2104                  * has a wildcard target and device.
2105                  */
2106                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
2107                  && ((periph->path->target == NULL)
2108                  ||(cur_pattern->target_id != periph->path->target->target_id)))
2109                         continue;
2110
2111                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
2112                  && ((periph->path->device == NULL)
2113                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
2114                         continue;
2115
2116                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
2117                  && (cur_pattern->unit_number != periph->unit_number))
2118                         continue;
2119
2120                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
2121                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
2122                              DEV_IDLEN) != 0))
2123                         continue;
2124
2125                 /*
2126                  * If we get to this point, the user definitely wants
2127                  * information on this peripheral.  So tell the caller to
2128                  * copy the data out.
2129                  */
2130                 retval |= DM_RET_COPY;
2131
2132                 /*
2133                  * The return action has already been set to stop, since
2134                  * peripherals don't have any nodes below them in the EDT.
2135                  */
2136                 return(retval);
2137         }
2138
2139         /*
2140          * If we get to this point, the peripheral that was passed in
2141          * doesn't match any of the patterns.
2142          */
2143         return(retval);
2144 }
2145
2146 static int
2147 xptedtbusfunc(struct cam_eb *bus, void *arg)
2148 {
2149         struct ccb_dev_match *cdm;
2150         dev_match_ret retval;
2151
2152         cdm = (struct ccb_dev_match *)arg;
2153
2154         /*
2155          * If our position is for something deeper in the tree, that means
2156          * that we've already seen this node.  So, we keep going down.
2157          */
2158         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2159          && (cdm->pos.cookie.bus == bus)
2160          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2161          && (cdm->pos.cookie.target != NULL))
2162                 retval = DM_RET_DESCEND;
2163         else
2164                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
2165
2166         /*
2167          * If we got an error, bail out of the search.
2168          */
2169         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2170                 cdm->status = CAM_DEV_MATCH_ERROR;
2171                 return(0);
2172         }
2173
2174         /*
2175          * If the copy flag is set, copy this bus out.
2176          */
2177         if (retval & DM_RET_COPY) {
2178                 int spaceleft, j;
2179
2180                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2181                         sizeof(struct dev_match_result));
2182
2183                 /*
2184                  * If we don't have enough space to put in another
2185                  * match result, save our position and tell the
2186                  * user there are more devices to check.
2187                  */
2188                 if (spaceleft < sizeof(struct dev_match_result)) {
2189                         bzero(&cdm->pos, sizeof(cdm->pos));
2190                         cdm->pos.position_type =
2191                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
2192
2193                         cdm->pos.cookie.bus = bus;
2194                         cdm->pos.generations[CAM_BUS_GENERATION]=
2195                                 bus_generation;
2196                         cdm->status = CAM_DEV_MATCH_MORE;
2197                         return(0);
2198                 }
2199                 j = cdm->num_matches;
2200                 cdm->num_matches++;
2201                 cdm->matches[j].type = DEV_MATCH_BUS;
2202                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
2203                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
2204                 cdm->matches[j].result.bus_result.unit_number =
2205                         bus->sim->unit_number;
2206                 strncpy(cdm->matches[j].result.bus_result.dev_name,
2207                         bus->sim->sim_name, DEV_IDLEN);
2208         }
2209
2210         /*
2211          * If the user is only interested in busses, there's no
2212          * reason to descend to the next level in the tree.
2213          */
2214         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2215                 return(1);
2216
2217         /*
2218          * If there is a target generation recorded, check it to
2219          * make sure the target list hasn't changed.
2220          */
2221         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2222          && (bus == cdm->pos.cookie.bus)
2223          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2224          && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0)
2225          && (cdm->pos.generations[CAM_TARGET_GENERATION] !=
2226              bus->generation)) {
2227                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2228                 return(0);
2229         }
2230
2231         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2232          && (cdm->pos.cookie.bus == bus)
2233          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2234          && (cdm->pos.cookie.target != NULL))
2235                 return(xpttargettraverse(bus,
2236                                         (struct cam_et *)cdm->pos.cookie.target,
2237                                          xptedttargetfunc, arg));
2238         else
2239                 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg));
2240 }
2241
2242 static int
2243 xptedttargetfunc(struct cam_et *target, void *arg)
2244 {
2245         struct ccb_dev_match *cdm;
2246
2247         cdm = (struct ccb_dev_match *)arg;
2248
2249         /*
2250          * If there is a device list generation recorded, check it to
2251          * make sure the device list hasn't changed.
2252          */
2253         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2254          && (cdm->pos.cookie.bus == target->bus)
2255          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2256          && (cdm->pos.cookie.target == target)
2257          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2258          && (cdm->pos.generations[CAM_DEV_GENERATION] != 0)
2259          && (cdm->pos.generations[CAM_DEV_GENERATION] !=
2260              target->generation)) {
2261                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2262                 return(0);
2263         }
2264
2265         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2266          && (cdm->pos.cookie.bus == target->bus)
2267          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2268          && (cdm->pos.cookie.target == target)
2269          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2270          && (cdm->pos.cookie.device != NULL))
2271                 return(xptdevicetraverse(target,
2272                                         (struct cam_ed *)cdm->pos.cookie.device,
2273                                          xptedtdevicefunc, arg));
2274         else
2275                 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg));
2276 }
2277
2278 static int
2279 xptedtdevicefunc(struct cam_ed *device, void *arg)
2280 {
2281
2282         struct ccb_dev_match *cdm;
2283         dev_match_ret retval;
2284
2285         cdm = (struct ccb_dev_match *)arg;
2286
2287         /*
2288          * If our position is for something deeper in the tree, that means
2289          * that we've already seen this node.  So, we keep going down.
2290          */
2291         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2292          && (cdm->pos.cookie.device == device)
2293          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2294          && (cdm->pos.cookie.periph != NULL))
2295                 retval = DM_RET_DESCEND;
2296         else
2297                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
2298                                         device);
2299
2300         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2301                 cdm->status = CAM_DEV_MATCH_ERROR;
2302                 return(0);
2303         }
2304
2305         /*
2306          * If the copy flag is set, copy this device out.
2307          */
2308         if (retval & DM_RET_COPY) {
2309                 int spaceleft, j;
2310
2311                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2312                         sizeof(struct dev_match_result));
2313
2314                 /*
2315                  * If we don't have enough space to put in another
2316                  * match result, save our position and tell the
2317                  * user there are more devices to check.
2318                  */
2319                 if (spaceleft < sizeof(struct dev_match_result)) {
2320                         bzero(&cdm->pos, sizeof(cdm->pos));
2321                         cdm->pos.position_type =
2322                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2323                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
2324
2325                         cdm->pos.cookie.bus = device->target->bus;
2326                         cdm->pos.generations[CAM_BUS_GENERATION]=
2327                                 bus_generation;
2328                         cdm->pos.cookie.target = device->target;
2329                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2330                                 device->target->bus->generation;
2331                         cdm->pos.cookie.device = device;
2332                         cdm->pos.generations[CAM_DEV_GENERATION] =
2333                                 device->target->generation;
2334                         cdm->status = CAM_DEV_MATCH_MORE;
2335                         return(0);
2336                 }
2337                 j = cdm->num_matches;
2338                 cdm->num_matches++;
2339                 cdm->matches[j].type = DEV_MATCH_DEVICE;
2340                 cdm->matches[j].result.device_result.path_id =
2341                         device->target->bus->path_id;
2342                 cdm->matches[j].result.device_result.target_id =
2343                         device->target->target_id;
2344                 cdm->matches[j].result.device_result.target_lun =
2345                         device->lun_id;
2346                 bcopy(&device->inq_data,
2347                       &cdm->matches[j].result.device_result.inq_data,
2348                       sizeof(struct scsi_inquiry_data));
2349
2350                 /* Let the user know whether this device is unconfigured */
2351                 if (device->flags & CAM_DEV_UNCONFIGURED)
2352                         cdm->matches[j].result.device_result.flags =
2353                                 DEV_RESULT_UNCONFIGURED;
2354                 else
2355                         cdm->matches[j].result.device_result.flags =
2356                                 DEV_RESULT_NOFLAG;
2357         }
2358
2359         /*
2360          * If the user isn't interested in peripherals, don't descend
2361          * the tree any further.
2362          */
2363         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2364                 return(1);
2365
2366         /*
2367          * If there is a peripheral list generation recorded, make sure
2368          * it hasn't changed.
2369          */
2370         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2371          && (device->target->bus == cdm->pos.cookie.bus)
2372          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2373          && (device->target == cdm->pos.cookie.target)
2374          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2375          && (device == cdm->pos.cookie.device)
2376          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2377          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2378          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2379              device->generation)){
2380                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2381                 return(0);
2382         }
2383
2384         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2385          && (cdm->pos.cookie.bus == device->target->bus)
2386          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2387          && (cdm->pos.cookie.target == device->target)
2388          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2389          && (cdm->pos.cookie.device == device)
2390          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2391          && (cdm->pos.cookie.periph != NULL))
2392                 return(xptperiphtraverse(device,
2393                                 (struct cam_periph *)cdm->pos.cookie.periph,
2394                                 xptedtperiphfunc, arg));
2395         else
2396                 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg));
2397 }
2398
2399 static int
2400 xptedtperiphfunc(struct cam_periph *periph, void *arg)
2401 {
2402         struct ccb_dev_match *cdm;
2403         dev_match_ret retval;
2404
2405         cdm = (struct ccb_dev_match *)arg;
2406
2407         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2408
2409         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2410                 cdm->status = CAM_DEV_MATCH_ERROR;
2411                 return(0);
2412         }
2413
2414         /*
2415          * If the copy flag is set, copy this peripheral out.
2416          */
2417         if (retval & DM_RET_COPY) {
2418                 int spaceleft, j;
2419
2420                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2421                         sizeof(struct dev_match_result));
2422
2423                 /*
2424                  * If we don't have enough space to put in another
2425                  * match result, save our position and tell the
2426                  * user there are more devices to check.
2427                  */
2428                 if (spaceleft < sizeof(struct dev_match_result)) {
2429                         bzero(&cdm->pos, sizeof(cdm->pos));
2430                         cdm->pos.position_type =
2431                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2432                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
2433                                 CAM_DEV_POS_PERIPH;
2434
2435                         cdm->pos.cookie.bus = periph->path->bus;
2436                         cdm->pos.generations[CAM_BUS_GENERATION]=
2437                                 bus_generation;
2438                         cdm->pos.cookie.target = periph->path->target;
2439                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2440                                 periph->path->bus->generation;
2441                         cdm->pos.cookie.device = periph->path->device;
2442                         cdm->pos.generations[CAM_DEV_GENERATION] =
2443                                 periph->path->target->generation;
2444                         cdm->pos.cookie.periph = periph;
2445                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2446                                 periph->path->device->generation;
2447                         cdm->status = CAM_DEV_MATCH_MORE;
2448                         return(0);
2449                 }
2450
2451                 j = cdm->num_matches;
2452                 cdm->num_matches++;
2453                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2454                 cdm->matches[j].result.periph_result.path_id =
2455                         periph->path->bus->path_id;
2456                 cdm->matches[j].result.periph_result.target_id =
2457                         periph->path->target->target_id;
2458                 cdm->matches[j].result.periph_result.target_lun =
2459                         periph->path->device->lun_id;
2460                 cdm->matches[j].result.periph_result.unit_number =
2461                         periph->unit_number;
2462                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2463                         periph->periph_name, DEV_IDLEN);
2464         }
2465
2466         return(1);
2467 }
2468
2469 static int
2470 xptedtmatch(struct ccb_dev_match *cdm)
2471 {
2472         int ret;
2473
2474         cdm->num_matches = 0;
2475
2476         /*
2477          * Check the bus list generation.  If it has changed, the user
2478          * needs to reset everything and start over.
2479          */
2480         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2481          && (cdm->pos.generations[CAM_BUS_GENERATION] != 0)
2482          && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) {
2483                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2484                 return(0);
2485         }
2486
2487         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2488          && (cdm->pos.cookie.bus != NULL))
2489                 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus,
2490                                      xptedtbusfunc, cdm);
2491         else
2492                 ret = xptbustraverse(NULL, xptedtbusfunc, cdm);
2493
2494         /*
2495          * If we get back 0, that means that we had to stop before fully
2496          * traversing the EDT.  It also means that one of the subroutines
2497          * has set the status field to the proper value.  If we get back 1,
2498          * we've fully traversed the EDT and copied out any matching entries.
2499          */
2500         if (ret == 1)
2501                 cdm->status = CAM_DEV_MATCH_LAST;
2502
2503         return(ret);
2504 }
2505
2506 static int
2507 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2508 {
2509         struct ccb_dev_match *cdm;
2510
2511         cdm = (struct ccb_dev_match *)arg;
2512
2513         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2514          && (cdm->pos.cookie.pdrv == pdrv)
2515          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2516          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2517          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2518              (*pdrv)->generation)) {
2519                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2520                 return(0);
2521         }
2522
2523         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2524          && (cdm->pos.cookie.pdrv == pdrv)
2525          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2526          && (cdm->pos.cookie.periph != NULL))
2527                 return(xptpdperiphtraverse(pdrv,
2528                                 (struct cam_periph *)cdm->pos.cookie.periph,
2529                                 xptplistperiphfunc, arg));
2530         else
2531                 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg));
2532 }
2533
2534 static int
2535 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2536 {
2537         struct ccb_dev_match *cdm;
2538         dev_match_ret retval;
2539
2540         cdm = (struct ccb_dev_match *)arg;
2541
2542         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2543
2544         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2545                 cdm->status = CAM_DEV_MATCH_ERROR;
2546                 return(0);
2547         }
2548
2549         /*
2550          * If the copy flag is set, copy this peripheral out.
2551          */
2552         if (retval & DM_RET_COPY) {
2553                 int spaceleft, j;
2554
2555                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2556                         sizeof(struct dev_match_result));
2557
2558                 /*
2559                  * If we don't have enough space to put in another
2560                  * match result, save our position and tell the
2561                  * user there are more devices to check.
2562                  */
2563                 if (spaceleft < sizeof(struct dev_match_result)) {
2564                         struct periph_driver **pdrv;
2565
2566                         pdrv = NULL;
2567                         bzero(&cdm->pos, sizeof(cdm->pos));
2568                         cdm->pos.position_type =
2569                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2570                                 CAM_DEV_POS_PERIPH;
2571
2572                         /*
2573                          * This may look a bit non-sensical, but it is
2574                          * actually quite logical.  There are very few
2575                          * peripheral drivers, and bloating every peripheral
2576                          * structure with a pointer back to its parent
2577                          * peripheral driver linker set entry would cost
2578                          * more in the long run than doing this quick lookup.
2579                          */
2580                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2581                                 if (strcmp((*pdrv)->driver_name,
2582                                     periph->periph_name) == 0)
2583                                         break;
2584                         }
2585
2586                         if (*pdrv == NULL) {
2587                                 cdm->status = CAM_DEV_MATCH_ERROR;
2588                                 return(0);
2589                         }
2590
2591                         cdm->pos.cookie.pdrv = pdrv;
2592                         /*
2593                          * The periph generation slot does double duty, as
2594                          * does the periph pointer slot.  They are used for
2595                          * both edt and pdrv lookups and positioning.
2596                          */
2597                         cdm->pos.cookie.periph = periph;
2598                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2599                                 (*pdrv)->generation;
2600                         cdm->status = CAM_DEV_MATCH_MORE;
2601                         return(0);
2602                 }
2603
2604                 j = cdm->num_matches;
2605                 cdm->num_matches++;
2606                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2607                 cdm->matches[j].result.periph_result.path_id =
2608                         periph->path->bus->path_id;
2609
2610                 /*
2611                  * The transport layer peripheral doesn't have a target or
2612                  * lun.
2613                  */
2614                 if (periph->path->target)
2615                         cdm->matches[j].result.periph_result.target_id =
2616                                 periph->path->target->target_id;
2617                 else
2618                         cdm->matches[j].result.periph_result.target_id = -1;
2619
2620                 if (periph->path->device)
2621                         cdm->matches[j].result.periph_result.target_lun =
2622                                 periph->path->device->lun_id;
2623                 else
2624                         cdm->matches[j].result.periph_result.target_lun = -1;
2625
2626                 cdm->matches[j].result.periph_result.unit_number =
2627                         periph->unit_number;
2628                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2629                         periph->periph_name, DEV_IDLEN);
2630         }
2631
2632         return(1);
2633 }
2634
2635 static int
2636 xptperiphlistmatch(struct ccb_dev_match *cdm)
2637 {
2638         int ret;
2639
2640         cdm->num_matches = 0;
2641
2642         /*
2643          * At this point in the edt traversal function, we check the bus
2644          * list generation to make sure that no busses have been added or
2645          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2646          * For the peripheral driver list traversal function, however, we
2647          * don't have to worry about new peripheral driver types coming or
2648          * going; they're in a linker set, and therefore can't change
2649          * without a recompile.
2650          */
2651
2652         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2653          && (cdm->pos.cookie.pdrv != NULL))
2654                 ret = xptpdrvtraverse(
2655                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2656                                 xptplistpdrvfunc, cdm);
2657         else
2658                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2659
2660         /*
2661          * If we get back 0, that means that we had to stop before fully
2662          * traversing the peripheral driver tree.  It also means that one of
2663          * the subroutines has set the status field to the proper value.  If
2664          * we get back 1, we've fully traversed the EDT and copied out any
2665          * matching entries.
2666          */
2667         if (ret == 1)
2668                 cdm->status = CAM_DEV_MATCH_LAST;
2669
2670         return(ret);
2671 }
2672
2673 static int
2674 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2675 {
2676         struct cam_eb *bus, *next_bus;
2677         int retval;
2678
2679         retval = 1;
2680
2681         for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses));
2682              bus != NULL;
2683              bus = next_bus) {
2684                 next_bus = TAILQ_NEXT(bus, links);
2685
2686                 retval = tr_func(bus, arg);
2687                 if (retval == 0)
2688                         return(retval);
2689         }
2690
2691         return(retval);
2692 }
2693
2694 static int
2695 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2696                   xpt_targetfunc_t *tr_func, void *arg)
2697 {
2698         struct cam_et *target, *next_target;
2699         int retval;
2700
2701         retval = 1;
2702         for (target = (start_target ? start_target :
2703                        TAILQ_FIRST(&bus->et_entries));
2704              target != NULL; target = next_target) {
2705
2706                 next_target = TAILQ_NEXT(target, links);
2707
2708                 retval = tr_func(target, arg);
2709
2710                 if (retval == 0)
2711                         return(retval);
2712         }
2713
2714         return(retval);
2715 }
2716
2717 static int
2718 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2719                   xpt_devicefunc_t *tr_func, void *arg)
2720 {
2721         struct cam_ed *device, *next_device;
2722         int retval;
2723
2724         retval = 1;
2725         for (device = (start_device ? start_device :
2726                        TAILQ_FIRST(&target->ed_entries));
2727              device != NULL;
2728              device = next_device) {
2729
2730                 next_device = TAILQ_NEXT(device, links);
2731
2732                 retval = tr_func(device, arg);
2733
2734                 if (retval == 0)
2735                         return(retval);
2736         }
2737
2738         return(retval);
2739 }
2740
2741 static int
2742 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2743                   xpt_periphfunc_t *tr_func, void *arg)
2744 {
2745         struct cam_periph *periph, *next_periph;
2746         int retval;
2747
2748         retval = 1;
2749
2750         for (periph = (start_periph ? start_periph :
2751                        SLIST_FIRST(&device->periphs));
2752              periph != NULL;
2753              periph = next_periph) {
2754
2755                 next_periph = SLIST_NEXT(periph, periph_links);
2756
2757                 retval = tr_func(periph, arg);
2758                 if (retval == 0)
2759                         return(retval);
2760         }
2761
2762         return(retval);
2763 }
2764
2765 static int
2766 xptpdrvtraverse(struct periph_driver **start_pdrv,
2767                 xpt_pdrvfunc_t *tr_func, void *arg)
2768 {
2769         struct periph_driver **pdrv;
2770         int retval;
2771
2772         retval = 1;
2773
2774         /*
2775          * We don't traverse the peripheral driver list like we do the
2776          * other lists, because it is a linker set, and therefore cannot be
2777          * changed during runtime.  If the peripheral driver list is ever
2778          * re-done to be something other than a linker set (i.e. it can
2779          * change while the system is running), the list traversal should
2780          * be modified to work like the other traversal functions.
2781          */
2782         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2783              *pdrv != NULL; pdrv++) {
2784                 retval = tr_func(pdrv, arg);
2785
2786                 if (retval == 0)
2787                         return(retval);
2788         }
2789
2790         return(retval);
2791 }
2792
2793 static int
2794 xptpdperiphtraverse(struct periph_driver **pdrv,
2795                     struct cam_periph *start_periph,
2796                     xpt_periphfunc_t *tr_func, void *arg)
2797 {
2798         struct cam_periph *periph, *next_periph;
2799         int retval;
2800
2801         retval = 1;
2802
2803         for (periph = (start_periph ? start_periph :
2804              TAILQ_FIRST(&(*pdrv)->units)); periph != NULL;
2805              periph = next_periph) {
2806
2807                 next_periph = TAILQ_NEXT(periph, unit_links);
2808
2809                 retval = tr_func(periph, arg);
2810                 if (retval == 0)
2811                         return(retval);
2812         }
2813         return(retval);
2814 }
2815
2816 static int
2817 xptdefbusfunc(struct cam_eb *bus, void *arg)
2818 {
2819         struct xpt_traverse_config *tr_config;
2820
2821         tr_config = (struct xpt_traverse_config *)arg;
2822
2823         if (tr_config->depth == XPT_DEPTH_BUS) {
2824                 xpt_busfunc_t *tr_func;
2825
2826                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2827
2828                 return(tr_func(bus, tr_config->tr_arg));
2829         } else
2830                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2831 }
2832
2833 static int
2834 xptdeftargetfunc(struct cam_et *target, void *arg)
2835 {
2836         struct xpt_traverse_config *tr_config;
2837
2838         tr_config = (struct xpt_traverse_config *)arg;
2839
2840         if (tr_config->depth == XPT_DEPTH_TARGET) {
2841                 xpt_targetfunc_t *tr_func;
2842
2843                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2844
2845                 return(tr_func(target, tr_config->tr_arg));
2846         } else
2847                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2848 }
2849
2850 static int
2851 xptdefdevicefunc(struct cam_ed *device, void *arg)
2852 {
2853         struct xpt_traverse_config *tr_config;
2854
2855         tr_config = (struct xpt_traverse_config *)arg;
2856
2857         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2858                 xpt_devicefunc_t *tr_func;
2859
2860                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2861
2862                 return(tr_func(device, tr_config->tr_arg));
2863         } else
2864                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2865 }
2866
2867 static int
2868 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2869 {
2870         struct xpt_traverse_config *tr_config;
2871         xpt_periphfunc_t *tr_func;
2872
2873         tr_config = (struct xpt_traverse_config *)arg;
2874
2875         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2876
2877         /*
2878          * Unlike the other default functions, we don't check for depth
2879          * here.  The peripheral driver level is the last level in the EDT,
2880          * so if we're here, we should execute the function in question.
2881          */
2882         return(tr_func(periph, tr_config->tr_arg));
2883 }
2884
2885 /*
2886  * Execute the given function for every bus in the EDT.
2887  */
2888 static int
2889 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2890 {
2891         struct xpt_traverse_config tr_config;
2892
2893         tr_config.depth = XPT_DEPTH_BUS;
2894         tr_config.tr_func = tr_func;
2895         tr_config.tr_arg = arg;
2896
2897         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2898 }
2899
2900 #ifdef notusedyet
2901 /*
2902  * Execute the given function for every target in the EDT.
2903  */
2904 static int
2905 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg)
2906 {
2907         struct xpt_traverse_config tr_config;
2908
2909         tr_config.depth = XPT_DEPTH_TARGET;
2910         tr_config.tr_func = tr_func;
2911         tr_config.tr_arg = arg;
2912
2913         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2914 }
2915 #endif /* notusedyet */
2916
2917 /*
2918  * Execute the given function for every device in the EDT.
2919  */
2920 static int
2921 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2922 {
2923         struct xpt_traverse_config tr_config;
2924
2925         tr_config.depth = XPT_DEPTH_DEVICE;
2926         tr_config.tr_func = tr_func;
2927         tr_config.tr_arg = arg;
2928
2929         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2930 }
2931
2932 #ifdef notusedyet
2933 /*
2934  * Execute the given function for every peripheral in the EDT.
2935  */
2936 static int
2937 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg)
2938 {
2939         struct xpt_traverse_config tr_config;
2940
2941         tr_config.depth = XPT_DEPTH_PERIPH;
2942         tr_config.tr_func = tr_func;
2943         tr_config.tr_arg = arg;
2944
2945         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2946 }
2947 #endif /* notusedyet */
2948
2949 static int
2950 xptsetasyncfunc(struct cam_ed *device, void *arg)
2951 {
2952         struct cam_path path;
2953         struct ccb_getdev cgd;
2954         struct async_node *cur_entry;
2955
2956         cur_entry = (struct async_node *)arg;
2957
2958         /*
2959          * Don't report unconfigured devices (Wildcard devs,
2960          * devices only for target mode, device instances
2961          * that have been invalidated but are waiting for
2962          * their last reference count to be released).
2963          */
2964         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2965                 return (1);
2966
2967         xpt_compile_path(&path,
2968                          NULL,
2969                          device->target->bus->path_id,
2970                          device->target->target_id,
2971                          device->lun_id);
2972         xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1);
2973         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2974         xpt_action((union ccb *)&cgd);
2975         cur_entry->callback(cur_entry->callback_arg,
2976                             AC_FOUND_DEVICE,
2977                             &path, &cgd);
2978         xpt_release_path(&path);
2979
2980         return(1);
2981 }
2982
2983 static int
2984 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2985 {
2986         struct cam_path path;
2987         struct ccb_pathinq cpi;
2988         struct async_node *cur_entry;
2989
2990         cur_entry = (struct async_node *)arg;
2991
2992         xpt_compile_path(&path, /*periph*/NULL,
2993                          bus->sim->path_id,
2994                          CAM_TARGET_WILDCARD,
2995                          CAM_LUN_WILDCARD);
2996         xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
2997         cpi.ccb_h.func_code = XPT_PATH_INQ;
2998         xpt_action((union ccb *)&cpi);
2999         cur_entry->callback(cur_entry->callback_arg,
3000                             AC_PATH_REGISTERED,
3001                             &path, &cpi);
3002         xpt_release_path(&path);
3003
3004         return(1);
3005 }
3006
3007 void
3008 xpt_action(union ccb *start_ccb)
3009 {
3010         int iopl;
3011
3012         GIANT_REQUIRED;
3013
3014         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
3015
3016         start_ccb->ccb_h.status = CAM_REQ_INPROG;
3017
3018         iopl = splsoftcam();
3019         switch (start_ccb->ccb_h.func_code) {
3020         case XPT_SCSI_IO:
3021         {
3022 #ifdef CAM_NEW_TRAN_CODE
3023                 struct cam_ed *device;
3024 #endif /* CAM_NEW_TRAN_CODE */
3025 #ifdef CAMDEBUG
3026                 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3027                 struct cam_path *path;
3028
3029                 path = start_ccb->ccb_h.path;
3030 #endif
3031
3032                 /*
3033                  * For the sake of compatibility with SCSI-1
3034                  * devices that may not understand the identify
3035                  * message, we include lun information in the
3036                  * second byte of all commands.  SCSI-1 specifies
3037                  * that luns are a 3 bit value and reserves only 3
3038                  * bits for lun information in the CDB.  Later
3039                  * revisions of the SCSI spec allow for more than 8
3040                  * luns, but have deprecated lun information in the
3041                  * CDB.  So, if the lun won't fit, we must omit.
3042                  *
3043                  * Also be aware that during initial probing for devices,
3044                  * the inquiry information is unknown but initialized to 0.
3045                  * This means that this code will be exercised while probing
3046                  * devices with an ANSI revision greater than 2.
3047                  */
3048 #ifdef CAM_NEW_TRAN_CODE
3049                 device = start_ccb->ccb_h.path->device;
3050                 if (device->protocol_version <= SCSI_REV_2
3051 #else /* CAM_NEW_TRAN_CODE */
3052                 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2
3053 #endif /* CAM_NEW_TRAN_CODE */
3054                  && start_ccb->ccb_h.target_lun < 8
3055                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
3056
3057                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
3058                             start_ccb->ccb_h.target_lun << 5;
3059                 }
3060                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
3061                 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n",
3062                           scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0],
3063                                        &path->device->inq_data),
3064                           scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes,
3065                                           cdb_str, sizeof(cdb_str))));
3066         }
3067         /* FALLTHROUGH */
3068         case XPT_TARGET_IO:
3069         case XPT_CONT_TARGET_IO:
3070                 start_ccb->csio.sense_resid = 0;
3071                 start_ccb->csio.resid = 0;
3072                 /* FALLTHROUGH */
3073         case XPT_RESET_DEV:
3074         case XPT_ENG_EXEC:
3075         {
3076                 struct cam_path *path;
3077                 struct cam_sim *sim;
3078                 int s;
3079                 int runq;
3080
3081                 path = start_ccb->ccb_h.path;
3082                 s = splsoftcam();
3083
3084                 sim = path->bus->sim;
3085                 if (SIM_DEAD(sim)) {
3086                         /* The SIM has gone; just execute the CCB directly. */
3087                         cam_ccbq_send_ccb(&path->device->ccbq, start_ccb);
3088                         (*(sim->sim_action))(sim, start_ccb);
3089                         splx(s);
3090                         break;
3091                 }
3092
3093                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
3094                 if (path->device->qfrozen_cnt == 0)
3095                         runq = xpt_schedule_dev_sendq(path->bus, path->device);
3096                 else
3097                         runq = 0;
3098                 splx(s);
3099                 if (runq != 0)
3100                         xpt_run_dev_sendq(path->bus);
3101                 break;
3102         }
3103         case XPT_SET_TRAN_SETTINGS:
3104         {
3105                 xpt_set_transfer_settings(&start_ccb->cts,
3106                                           start_ccb->ccb_h.path->device,
3107                                           /*async_update*/FALSE);
3108                 break;
3109         }
3110         case XPT_CALC_GEOMETRY:
3111         {
3112                 struct cam_sim *sim;
3113
3114                 /* Filter out garbage */
3115                 if (start_ccb->ccg.block_size == 0
3116                  || start_ccb->ccg.volume_size == 0) {
3117                         start_ccb->ccg.cylinders = 0;
3118                         start_ccb->ccg.heads = 0;
3119                         start_ccb->ccg.secs_per_track = 0;
3120                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3121                         break;
3122                 }
3123 #ifdef PC98
3124                 /*
3125                  * In a PC-98 system, geometry translation depens on
3126                  * the "real" device geometry obtained from mode page 4.
3127                  * SCSI geometry translation is performed in the
3128                  * initialization routine of the SCSI BIOS and the result
3129                  * stored in host memory.  If the translation is available
3130                  * in host memory, use it.  If not, rely on the default
3131                  * translation the device driver performs.
3132                  */
3133                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
3134                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3135                         break;
3136                 }
3137 #endif
3138                 sim = start_ccb->ccb_h.path->bus->sim;
3139                 (*(sim->sim_action))(sim, start_ccb);
3140                 break;
3141         }
3142         case XPT_ABORT:
3143         {
3144                 union ccb* abort_ccb;
3145                 int s;
3146
3147                 abort_ccb = start_ccb->cab.abort_ccb;
3148                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
3149
3150                         if (abort_ccb->ccb_h.pinfo.index >= 0) {
3151                                 struct cam_ccbq *ccbq;
3152
3153                                 ccbq = &abort_ccb->ccb_h.path->device->ccbq;
3154                                 cam_ccbq_remove_ccb(ccbq, abort_ccb);
3155                                 abort_ccb->ccb_h.status =
3156                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
3157                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
3158                                 s = splcam();
3159                                 xpt_done(abort_ccb);
3160                                 splx(s);
3161                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3162                                 break;
3163                         }
3164                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
3165                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
3166                                 /*
3167                                  * We've caught this ccb en route to
3168                                  * the SIM.  Flag it for abort and the
3169                                  * SIM will do so just before starting
3170                                  * real work on the CCB.
3171                                  */
3172                                 abort_ccb->ccb_h.status =
3173                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
3174                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
3175                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3176                                 break;
3177                         }
3178                 }
3179                 if (XPT_FC_IS_QUEUED(abort_ccb)
3180                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
3181                         /*
3182                          * It's already completed but waiting
3183                          * for our SWI to get to it.
3184                          */
3185                         start_ccb->ccb_h.status = CAM_UA_ABORT;
3186                         break;
3187                 }
3188                 /*
3189                  * If we weren't able to take care of the abort request
3190                  * in the XPT, pass the request down to the SIM for processing.
3191                  */
3192         }
3193         /* FALLTHROUGH */
3194         case XPT_ACCEPT_TARGET_IO:
3195         case XPT_EN_LUN:
3196         case XPT_IMMED_NOTIFY:
3197         case XPT_NOTIFY_ACK:
3198         case XPT_GET_TRAN_SETTINGS:
3199         case XPT_RESET_BUS:
3200         {
3201                 struct cam_sim *sim;
3202
3203                 sim = start_ccb->ccb_h.path->bus->sim;
3204                 (*(sim->sim_action))(sim, start_ccb);
3205                 break;
3206         }
3207         case XPT_PATH_INQ:
3208         {
3209                 struct cam_sim *sim;
3210
3211                 sim = start_ccb->ccb_h.path->bus->sim;
3212                 (*(sim->sim_action))(sim, start_ccb);
3213                 break;
3214         }
3215         case XPT_PATH_STATS:
3216                 start_ccb->cpis.last_reset =
3217                         start_ccb->ccb_h.path->bus->last_reset;
3218                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3219                 break;
3220         case XPT_GDEV_TYPE:
3221         {
3222                 struct cam_ed *dev;
3223                 int s;
3224
3225                 dev = start_ccb->ccb_h.path->device;
3226                 s = splcam();
3227                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
3228                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
3229                 } else {
3230                         struct ccb_getdev *cgd;
3231                         struct cam_eb *bus;
3232                         struct cam_et *tar;
3233
3234                         cgd = &start_ccb->cgd;
3235                         bus = cgd->ccb_h.path->bus;
3236                         tar = cgd->ccb_h.path->target;
3237                         cgd->inq_data = dev->inq_data;
3238                         cgd->ccb_h.status = CAM_REQ_CMP;
3239                         cgd->serial_num_len = dev->serial_num_len;
3240                         if ((dev->serial_num_len > 0)
3241                          && (dev->serial_num != NULL))
3242                                 bcopy(dev->serial_num, cgd->serial_num,
3243                                       dev->serial_num_len);
3244                 }
3245                 splx(s);
3246                 break;
3247         }
3248         case XPT_GDEV_STATS:
3249         {
3250                 struct cam_ed *dev;
3251                 int s;
3252
3253                 dev = start_ccb->ccb_h.path->device;
3254                 s = splcam();
3255                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
3256                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
3257                 } else {
3258                         struct ccb_getdevstats *cgds;
3259                         struct cam_eb *bus;
3260                         struct cam_et *tar;
3261
3262                         cgds = &start_ccb->cgds;
3263                         bus = cgds->ccb_h.path->bus;
3264                         tar = cgds->ccb_h.path->target;
3265                         cgds->dev_openings = dev->ccbq.dev_openings;
3266                         cgds->dev_active = dev->ccbq.dev_active;
3267                         cgds->devq_openings = dev->ccbq.devq_openings;
3268                         cgds->devq_queued = dev->ccbq.queue.entries;
3269                         cgds->held = dev->ccbq.held;
3270                         cgds->last_reset = tar->last_reset;
3271                         cgds->maxtags = dev->quirk->maxtags;
3272                         cgds->mintags = dev->quirk->mintags;
3273                         if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
3274                                 cgds->last_reset = bus->last_reset;
3275                         cgds->ccb_h.status = CAM_REQ_CMP;
3276                 }
3277                 splx(s);
3278                 break;
3279         }
3280         case XPT_GDEVLIST:
3281         {
3282                 struct cam_periph       *nperiph;
3283                 struct periph_list      *periph_head;
3284                 struct ccb_getdevlist   *cgdl;
3285                 u_int                   i;
3286                 int                     s;
3287                 struct cam_ed           *device;
3288                 int                     found;
3289
3290
3291                 found = 0;
3292
3293                 /*
3294                  * Don't want anyone mucking with our data.
3295                  */
3296                 s = splcam();
3297                 device = start_ccb->ccb_h.path->device;
3298                 periph_head = &device->periphs;
3299                 cgdl = &start_ccb->cgdl;
3300
3301                 /*
3302                  * Check and see if the list has changed since the user
3303                  * last requested a list member.  If so, tell them that the
3304                  * list has changed, and therefore they need to start over
3305                  * from the beginning.
3306                  */
3307                 if ((cgdl->index != 0) &&
3308                     (cgdl->generation != device->generation)) {
3309                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
3310                         splx(s);
3311                         break;
3312                 }
3313
3314                 /*
3315                  * Traverse the list of peripherals and attempt to find
3316                  * the requested peripheral.
3317                  */
3318                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
3319                      (nperiph != NULL) && (i <= cgdl->index);
3320                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
3321                         if (i == cgdl->index) {
3322                                 strncpy(cgdl->periph_name,
3323                                         nperiph->periph_name,
3324                                         DEV_IDLEN);
3325                                 cgdl->unit_number = nperiph->unit_number;
3326                                 found = 1;
3327                         }
3328                 }
3329                 if (found == 0) {
3330                         cgdl->status = CAM_GDEVLIST_ERROR;
3331                         splx(s);
3332                         break;
3333                 }
3334
3335                 if (nperiph == NULL)
3336                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
3337                 else
3338                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
3339
3340                 cgdl->index++;
3341                 cgdl->generation = device->generation;
3342
3343                 splx(s);
3344                 cgdl->ccb_h.status = CAM_REQ_CMP;
3345                 break;
3346         }
3347         case XPT_DEV_MATCH:
3348         {
3349                 int s;
3350                 dev_pos_type position_type;
3351                 struct ccb_dev_match *cdm;
3352
3353                 cdm = &start_ccb->cdm;
3354
3355                 /*
3356                  * Prevent EDT changes while we traverse it.
3357                  */
3358                 s = splcam();
3359                 /*
3360                  * There are two ways of getting at information in the EDT.
3361                  * The first way is via the primary EDT tree.  It starts
3362                  * with a list of busses, then a list of targets on a bus,
3363                  * then devices/luns on a target, and then peripherals on a
3364                  * device/lun.  The "other" way is by the peripheral driver
3365                  * lists.  The peripheral driver lists are organized by
3366                  * peripheral driver.  (obviously)  So it makes sense to
3367                  * use the peripheral driver list if the user is looking
3368                  * for something like "da1", or all "da" devices.  If the
3369                  * user is looking for something on a particular bus/target
3370                  * or lun, it's generally better to go through the EDT tree.
3371                  */
3372
3373                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
3374                         position_type = cdm->pos.position_type;
3375                 else {
3376                         u_int i;
3377
3378                         position_type = CAM_DEV_POS_NONE;
3379
3380                         for (i = 0; i < cdm->num_patterns; i++) {
3381                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
3382                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
3383                                         position_type = CAM_DEV_POS_EDT;
3384                                         break;
3385                                 }
3386                         }
3387
3388                         if (cdm->num_patterns == 0)
3389                                 position_type = CAM_DEV_POS_EDT;
3390                         else if (position_type == CAM_DEV_POS_NONE)
3391                                 position_type = CAM_DEV_POS_PDRV;
3392                 }
3393
3394                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
3395                 case CAM_DEV_POS_EDT:
3396                         xptedtmatch(cdm);
3397                         break;
3398                 case CAM_DEV_POS_PDRV:
3399                         xptperiphlistmatch(cdm);
3400                         break;
3401                 default:
3402                         cdm->status = CAM_DEV_MATCH_ERROR;
3403                         break;
3404                 }
3405
3406                 splx(s);
3407
3408                 if (cdm->status == CAM_DEV_MATCH_ERROR)
3409                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
3410                 else
3411                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3412
3413                 break;
3414         }
3415         case XPT_SASYNC_CB:
3416         {
3417                 struct ccb_setasync *csa;
3418                 struct async_node *cur_entry;
3419                 struct async_list *async_head;
3420                 u_int32_t added;
3421                 int s;
3422
3423                 csa = &start_ccb->csa;
3424                 added = csa->event_enable;
3425                 async_head = &csa->ccb_h.path->device->asyncs;
3426
3427                 /*
3428                  * If there is already an entry for us, simply
3429                  * update it.
3430                  */
3431                 s = splcam();
3432                 cur_entry = SLIST_FIRST(async_head);
3433                 while (cur_entry != NULL) {
3434                         if ((cur_entry->callback_arg == csa->callback_arg)
3435                          && (cur_entry->callback == csa->callback))
3436                                 break;
3437                         cur_entry = SLIST_NEXT(cur_entry, links);
3438                 }
3439
3440                 if (cur_entry != NULL) {
3441                         /*
3442                          * If the request has no flags set,
3443                          * remove the entry.
3444                          */
3445                         added &= ~cur_entry->event_enable;
3446                         if (csa->event_enable == 0) {
3447                                 SLIST_REMOVE(async_head, cur_entry,
3448                                              async_node, links);
3449                                 csa->ccb_h.path->device->refcount--;
3450                                 free(cur_entry, M_CAMXPT);
3451                         } else {
3452                                 cur_entry->event_enable = csa->event_enable;
3453                         }
3454                 } else {
3455                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3456                                            M_NOWAIT);
3457                         if (cur_entry == NULL) {
3458                                 splx(s);
3459                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3460                                 break;
3461                         }
3462                         cur_entry->event_enable = csa->event_enable;
3463                         cur_entry->callback_arg = csa->callback_arg;
3464                         cur_entry->callback = csa->callback;
3465                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3466                         csa->ccb_h.path->device->refcount++;
3467                 }
3468
3469                 if ((added & AC_FOUND_DEVICE) != 0) {
3470                         /*
3471                          * Get this peripheral up to date with all
3472                          * the currently existing devices.
3473                          */
3474                         xpt_for_all_devices(xptsetasyncfunc, cur_entry);
3475                 }
3476                 if ((added & AC_PATH_REGISTERED) != 0) {
3477                         /*
3478                          * Get this peripheral up to date with all
3479                          * the currently existing busses.
3480                          */
3481                         xpt_for_all_busses(xptsetasyncbusfunc, cur_entry);
3482                 }
3483                 splx(s);
3484                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3485                 break;
3486         }
3487         case XPT_REL_SIMQ:
3488         {
3489                 struct ccb_relsim *crs;
3490                 struct cam_ed *dev;
3491                 int s;
3492
3493                 crs = &start_ccb->crs;
3494                 dev = crs->ccb_h.path->device;
3495                 if (dev == NULL) {
3496
3497                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3498                         break;
3499                 }
3500
3501                 s = splcam();
3502
3503                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3504
3505                         if ((dev->inq_data.flags & SID_CmdQue) != 0) {
3506
3507                                 /* Don't ever go below one opening */
3508                                 if (crs->openings > 0) {
3509                                         xpt_dev_ccbq_resize(crs->ccb_h.path,
3510                                                             crs->openings);
3511
3512                                         if (bootverbose) {
3513                                                 xpt_print_path(crs->ccb_h.path);
3514                                                 printf("tagged openings "
3515                                                        "now %d\n",
3516                                                        crs->openings);
3517                                         }
3518                                 }
3519                         }
3520                 }
3521
3522                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3523
3524                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3525
3526                                 /*
3527                                  * Just extend the old timeout and decrement
3528                                  * the freeze count so that a single timeout
3529                                  * is sufficient for releasing the queue.
3530                                  */
3531                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3532                                 untimeout(xpt_release_devq_timeout,
3533                                           dev, dev->c_handle);
3534                         } else {
3535
3536                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3537                         }
3538
3539                         dev->c_handle =
3540                                 timeout(xpt_release_devq_timeout,
3541                                         dev,
3542                                         (crs->release_timeout * hz) / 1000);
3543
3544                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3545
3546                 }
3547
3548                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3549
3550                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3551                                 /*
3552                                  * Decrement the freeze count so that a single
3553                                  * completion is still sufficient to unfreeze
3554                                  * the queue.
3555                                  */
3556                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3557                         } else {
3558
3559                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3560                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3561                         }
3562                 }
3563
3564                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3565
3566                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3567                          || (dev->ccbq.dev_active == 0)) {
3568
3569                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3570                         } else {
3571
3572                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3573                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3574                         }
3575                 }
3576                 splx(s);
3577
3578                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) {
3579
3580                         xpt_release_devq(crs->ccb_h.path, /*count*/1,
3581                                          /*run_queue*/TRUE);
3582                 }
3583                 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt;
3584                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3585                 break;
3586         }
3587         case XPT_SCAN_BUS:
3588                 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb);
3589                 break;
3590         case XPT_SCAN_LUN:
3591                 xpt_scan_lun(start_ccb->ccb_h.path->periph,
3592                              start_ccb->ccb_h.path, start_ccb->crcn.flags,
3593                              start_ccb);
3594                 break;
3595         case XPT_DEBUG: {
3596 #ifdef CAMDEBUG
3597                 int s;
3598
3599                 s = splcam();
3600 #ifdef CAM_DEBUG_DELAY
3601                 cam_debug_delay = CAM_DEBUG_DELAY;
3602 #endif
3603                 cam_dflags = start_ccb->cdbg.flags;
3604                 if (cam_dpath != NULL) {
3605                         xpt_free_path(cam_dpath);
3606                         cam_dpath = NULL;
3607                 }
3608
3609                 if (cam_dflags != CAM_DEBUG_NONE) {
3610                         if (xpt_create_path(&cam_dpath, xpt_periph,
3611                                             start_ccb->ccb_h.path_id,
3612                                             start_ccb->ccb_h.target_id,
3613                                             start_ccb->ccb_h.target_lun) !=
3614                                             CAM_REQ_CMP) {
3615                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3616                                 cam_dflags = CAM_DEBUG_NONE;
3617                         } else {
3618                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3619                                 xpt_print_path(cam_dpath);
3620                                 printf("debugging flags now %x\n", cam_dflags);
3621                         }
3622                 } else {
3623                         cam_dpath = NULL;
3624                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3625                 }
3626                 splx(s);
3627 #else /* !CAMDEBUG */
3628                 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3629 #endif /* CAMDEBUG */
3630                 break;
3631         }
3632         case XPT_NOOP:
3633                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3634                         xpt_freeze_devq(start_ccb->ccb_h.path, 1);
3635                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3636                 break;
3637         default:
3638         case XPT_SDEV_TYPE:
3639         case XPT_TERM_IO:
3640         case XPT_ENG_INQ:
3641                 /* XXX Implement */
3642                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3643                 break;
3644         }
3645         splx(iopl);
3646 }
3647
3648 void
3649 xpt_polled_action(union ccb *start_ccb)
3650 {
3651         int       s;
3652         u_int32_t timeout;
3653         struct    cam_sim *sim;
3654         struct    cam_devq *devq;
3655         struct    cam_ed *dev;
3656
3657         GIANT_REQUIRED;
3658
3659         timeout = start_ccb->ccb_h.timeout;
3660         sim = start_ccb->ccb_h.path->bus->sim;
3661         devq = sim->devq;
3662         dev = start_ccb->ccb_h.path->device;
3663
3664         s = splcam();
3665
3666         /*
3667          * Steal an opening so that no other queued requests
3668          * can get it before us while we simulate interrupts.
3669          */
3670         dev->ccbq.devq_openings--;
3671         dev->ccbq.dev_openings--;
3672
3673         while(((devq != NULL && devq->send_openings <= 0) ||
3674            dev->ccbq.dev_openings < 0) && (--timeout > 0)) {
3675                 DELAY(1000);
3676                 (*(sim->sim_poll))(sim);
3677                 camisr(&cam_bioq);
3678         }
3679
3680         dev->ccbq.devq_openings++;
3681         dev->ccbq.dev_openings++;
3682
3683         if (timeout != 0) {
3684                 xpt_action(start_ccb);
3685                 while(--timeout > 0) {
3686                         (*(sim->sim_poll))(sim);
3687                         camisr(&cam_bioq);
3688                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3689                             != CAM_REQ_INPROG)
3690                                 break;
3691                         DELAY(1000);
3692                 }
3693                 if (timeout == 0) {
3694                         /*
3695                          * XXX Is it worth adding a sim_timeout entry
3696                          * point so we can attempt recovery?  If
3697                          * this is only used for dumps, I don't think
3698                          * it is.
3699                          */
3700                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3701                 }
3702         } else {
3703                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3704         }
3705         splx(s);
3706 }
3707
3708 /*
3709  * Schedule a peripheral driver to receive a ccb when it's
3710  * target device has space for more transactions.
3711  */
3712 void
3713 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority)
3714 {
3715         struct cam_ed *device;
3716         union ccb *work_ccb;
3717         int s;
3718         int runq;
3719
3720         GIANT_REQUIRED;
3721
3722         CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3723         device = perph->path->device;
3724         s = splsoftcam();
3725         if (periph_is_queued(perph)) {
3726                 /* Simply reorder based on new priority */
3727                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3728                           ("   change priority to %d\n", new_priority));
3729                 if (new_priority < perph->pinfo.priority) {
3730                         camq_change_priority(&device->drvq,
3731                                              perph->pinfo.index,
3732                                              new_priority);
3733                 }
3734                 runq = 0;
3735         } else if (SIM_DEAD(perph->path->bus->sim)) {
3736                 /* The SIM is gone so just call periph_start directly. */
3737                 work_ccb = xpt_get_ccb(perph->path->device);
3738                 splx(s);
3739                 if (work_ccb == NULL)
3740                         return; /* XXX */
3741                 xpt_setup_ccb(&work_ccb->ccb_h, perph->path, new_priority);
3742                 perph->pinfo.priority = new_priority;
3743                 perph->periph_start(perph, work_ccb);
3744                 return;
3745         } else {
3746                 /* New entry on the queue */
3747                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3748                           ("   added periph to queue\n"));
3749                 perph->pinfo.priority = new_priority;
3750                 perph->pinfo.generation = ++device->drvq.generation;
3751                 camq_insert(&device->drvq, &perph->pinfo);
3752                 runq = xpt_schedule_dev_allocq(perph->path->bus, device);
3753         }
3754         splx(s);
3755         if (runq != 0) {
3756                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3757                           ("   calling xpt_run_devq\n"));
3758                 xpt_run_dev_allocq(perph->path->bus);
3759         }
3760 }
3761
3762
3763 /*
3764  * Schedule a device to run on a given queue.
3765  * If the device was inserted as a new entry on the queue,
3766  * return 1 meaning the device queue should be run. If we
3767  * were already queued, implying someone else has already
3768  * started the queue, return 0 so the caller doesn't attempt
3769  * to run the queue.  Must be run at either splsoftcam
3770  * (or splcam since that encompases splsoftcam).
3771  */
3772 static int
3773 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3774                  u_int32_t new_priority)
3775 {
3776         int retval;
3777         u_int32_t old_priority;
3778
3779         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3780
3781         old_priority = pinfo->priority;
3782
3783         /*
3784          * Are we already queued?
3785          */
3786         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3787                 /* Simply reorder based on new priority */
3788                 if (new_priority < old_priority) {
3789                         camq_change_priority(queue, pinfo->index,
3790                                              new_priority);
3791                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3792                                         ("changed priority to %d\n",
3793                                          new_priority));
3794                 }
3795                 retval = 0;
3796         } else {
3797                 /* New entry on the queue */
3798                 if (new_priority < old_priority)
3799                         pinfo->priority = new_priority;
3800
3801                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3802                                 ("Inserting onto queue\n"));
3803                 pinfo->generation = ++queue->generation;
3804                 camq_insert(queue, pinfo);
3805                 retval = 1;
3806         }
3807         return (retval);
3808 }
3809
3810 static void
3811 xpt_run_dev_allocq(struct cam_eb *bus)
3812 {
3813         struct  cam_devq *devq;
3814         int     s;
3815
3816         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n"));
3817         devq = bus->sim->devq;
3818
3819         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3820                         ("   qfrozen_cnt == 0x%x, entries == %d, "
3821                          "openings == %d, active == %d\n",
3822                          devq->alloc_queue.qfrozen_cnt,
3823                          devq->alloc_queue.entries,
3824                          devq->alloc_openings,
3825                          devq->alloc_active));
3826
3827         s = splsoftcam();
3828         devq->alloc_queue.qfrozen_cnt++;
3829         while ((devq->alloc_queue.entries > 0)
3830             && (devq->alloc_openings > 0)
3831             && (devq->alloc_queue.qfrozen_cnt <= 1)) {
3832                 struct  cam_ed_qinfo *qinfo;
3833                 struct  cam_ed *device;
3834                 union   ccb *work_ccb;
3835                 struct  cam_periph *drv;
3836                 struct  camq *drvq;
3837
3838                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
3839                                                            CAMQ_HEAD);
3840                 device = qinfo->device;
3841
3842                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3843                                 ("running device %p\n", device));
3844
3845                 drvq = &device->drvq;
3846
3847 #ifdef CAMDEBUG
3848                 if (drvq->entries <= 0) {
3849                         panic("xpt_run_dev_allocq: "
3850                               "Device on queue without any work to do");
3851                 }
3852 #endif
3853                 if ((work_ccb = xpt_get_ccb(device)) != NULL) {
3854                         devq->alloc_openings--;
3855                         devq->alloc_active++;
3856                         drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD);
3857                         splx(s);
3858                         xpt_setup_ccb(&work_ccb->ccb_h, drv->path,
3859                                       drv->pinfo.priority);
3860                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3861                                         ("calling periph start\n"));
3862                         drv->periph_start(drv, work_ccb);
3863                 } else {
3864                         /*
3865                          * Malloc failure in alloc_ccb
3866                          */
3867                         /*
3868                          * XXX add us to a list to be run from free_ccb
3869                          * if we don't have any ccbs active on this
3870                          * device queue otherwise we may never get run
3871                          * again.
3872                          */
3873                         break;
3874                 }
3875
3876                 /* Raise IPL for possible insertion and test at top of loop */
3877                 s = splsoftcam();
3878
3879                 if (drvq->entries > 0) {
3880                         /* We have more work.  Attempt to reschedule */
3881                         xpt_schedule_dev_allocq(bus, device);
3882                 }
3883         }
3884         devq->alloc_queue.qfrozen_cnt--;
3885         splx(s);
3886 }
3887
3888 static void
3889 xpt_run_dev_sendq(struct cam_eb *bus)
3890 {
3891         struct  cam_devq *devq;
3892         int     s;
3893
3894         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n"));
3895
3896         devq = bus->sim->devq;
3897
3898         s = splcam();
3899         devq->send_queue.qfrozen_cnt++;
3900         splx(s);
3901         s = splsoftcam();
3902         while ((devq->send_queue.entries > 0)
3903             && (devq->send_openings > 0)) {
3904                 struct  cam_ed_qinfo *qinfo;
3905                 struct  cam_ed *device;
3906                 union ccb *work_ccb;
3907                 struct  cam_sim *sim;
3908                 int     ospl;
3909
3910                 ospl = splcam();
3911                 if (devq->send_queue.qfrozen_cnt > 1) {
3912                         splx(ospl);
3913                         break;
3914                 }
3915
3916                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
3917                                                            CAMQ_HEAD);
3918                 device = qinfo->device;
3919
3920                 /*
3921                  * If the device has been "frozen", don't attempt
3922                  * to run it.
3923                  */
3924                 if (device->qfrozen_cnt > 0) {
3925                         splx(ospl);
3926                         continue;
3927                 }
3928
3929                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3930                                 ("running device %p\n", device));
3931
3932                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3933                 if (work_ccb == NULL) {
3934                         printf("device on run queue with no ccbs???\n");
3935                         splx(ospl);
3936                         continue;
3937                 }
3938
3939                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3940
3941                         if (num_highpower <= 0) {
3942                                 /*
3943                                  * We got a high power command, but we
3944                                  * don't have any available slots.  Freeze
3945                                  * the device queue until we have a slot
3946                                  * available.
3947                                  */
3948                                 device->qfrozen_cnt++;
3949                                 STAILQ_INSERT_TAIL(&highpowerq,
3950                                                    &work_ccb->ccb_h,
3951                                                    xpt_links.stqe);
3952
3953                                 splx(ospl);
3954                                 continue;
3955                         } else {
3956                                 /*
3957                                  * Consume a high power slot while
3958                                  * this ccb runs.
3959                                  */
3960                                 num_highpower--;
3961                         }
3962                 }
3963                 devq->active_dev = device;
3964                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3965
3966                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3967                 splx(ospl);
3968
3969                 devq->send_openings--;
3970                 devq->send_active++;
3971
3972                 if (device->ccbq.queue.entries > 0)
3973                         xpt_schedule_dev_sendq(bus, device);
3974
3975                 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){
3976                         /*
3977                          * The client wants to freeze the queue
3978                          * after this CCB is sent.
3979                          */
3980                         ospl = splcam();
3981                         device->qfrozen_cnt++;
3982                         splx(ospl);
3983                 }
3984
3985                 splx(s);
3986
3987                 /* In Target mode, the peripheral driver knows best... */
3988                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3989                         if ((device->inq_flags & SID_CmdQue) != 0
3990                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3991                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3992                         else
3993                                 /*
3994                                  * Clear this in case of a retried CCB that
3995                                  * failed due to a rejected tag.
3996                                  */
3997                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3998                 }
3999
4000                 /*
4001                  * Device queues can be shared among multiple sim instances
4002                  * that reside on different busses.  Use the SIM in the queue
4003                  * CCB's path, rather than the one in the bus that was passed
4004                  * into this function.
4005                  */
4006                 sim = work_ccb->ccb_h.path->bus->sim;
4007                 (*(sim->sim_action))(sim, work_ccb);
4008
4009                 ospl = splcam();
4010                 devq->active_dev = NULL;
4011                 splx(ospl);
4012                 /* Raise IPL for possible insertion and test at top of loop */
4013                 s = splsoftcam();
4014         }
4015         splx(s);
4016         s = splcam();
4017         devq->send_queue.qfrozen_cnt--;
4018         splx(s);
4019 }
4020
4021 /*
4022  * This function merges stuff from the slave ccb into the master ccb, while
4023  * keeping important fields in the master ccb constant.
4024  */
4025 void
4026 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
4027 {
4028         GIANT_REQUIRED;
4029
4030         /*
4031          * Pull fields that are valid for peripheral drivers to set
4032          * into the master CCB along with the CCB "payload".
4033          */
4034         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
4035         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
4036         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
4037         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
4038         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
4039               sizeof(union ccb) - sizeof(struct ccb_hdr));
4040 }
4041
4042 void
4043 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
4044 {
4045         GIANT_REQUIRED;
4046
4047         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
4048         ccb_h->pinfo.priority = priority;
4049         ccb_h->path = path;
4050         ccb_h->path_id = path->bus->path_id;
4051         if (path->target)
4052                 ccb_h->target_id = path->target->target_id;
4053         else
4054                 ccb_h->target_id = CAM_TARGET_WILDCARD;
4055         if (path->device) {
4056                 ccb_h->target_lun = path->device->lun_id;
4057                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
4058         } else {
4059                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
4060         }
4061         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
4062         ccb_h->flags = 0;
4063 }
4064
4065 /* Path manipulation functions */
4066 cam_status
4067 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
4068                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
4069 {
4070         struct     cam_path *path;
4071         cam_status status;
4072
4073         GIANT_REQUIRED;
4074
4075         path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_NOWAIT);
4076
4077         if (path == NULL) {
4078                 status = CAM_RESRC_UNAVAIL;
4079                 return(status);
4080         }
4081         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
4082         if (status != CAM_REQ_CMP) {
4083                 free(path, M_CAMXPT);
4084                 path = NULL;
4085         }
4086         *new_path_ptr = path;
4087         return (status);
4088 }
4089
4090 static cam_status
4091 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
4092                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
4093 {
4094         struct       cam_eb *bus;
4095         struct       cam_et *target;
4096         struct       cam_ed *device;
4097         cam_status   status;
4098         int          s;
4099
4100         status = CAM_REQ_CMP;   /* Completed without error */
4101         target = NULL;          /* Wildcarded */
4102         device = NULL;          /* Wildcarded */
4103
4104         /*
4105          * We will potentially modify the EDT, so block interrupts
4106          * that may attempt to create cam paths.
4107          */
4108         s = splcam();
4109         bus = xpt_find_bus(path_id);
4110         if (bus == NULL) {
4111                 status = CAM_PATH_INVALID;
4112         } else {
4113                 target = xpt_find_target(bus, target_id);
4114                 if (target == NULL) {
4115                         /* Create one */
4116                         struct cam_et *new_target;
4117
4118                         new_target = xpt_alloc_target(bus, target_id);
4119                         if (new_target == NULL) {
4120                                 status = CAM_RESRC_UNAVAIL;
4121                         } else {
4122                                 target = new_target;
4123                         }
4124                 }
4125                 if (target != NULL) {
4126                         device = xpt_find_device(target, lun_id);
4127                         if (device == NULL) {
4128                                 /* Create one */
4129                                 struct cam_ed *new_device;
4130
4131                                 new_device = xpt_alloc_device(bus,
4132                                                               target,
4133                                                               lun_id);
4134                                 if (new_device == NULL) {
4135                                         status = CAM_RESRC_UNAVAIL;
4136                                 } else {
4137                                         device = new_device;
4138                                 }
4139                         }
4140                 }
4141         }
4142         splx(s);
4143
4144         /*
4145          * Only touch the user's data if we are successful.
4146          */
4147         if (status == CAM_REQ_CMP) {
4148                 new_path->periph = perph;
4149                 new_path->bus = bus;
4150                 new_path->target = target;
4151                 new_path->device = device;
4152                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
4153         } else {
4154                 if (device != NULL)
4155                         xpt_release_device(bus, target, device);
4156                 if (target != NULL)
4157                         xpt_release_target(bus, target);
4158                 if (bus != NULL)
4159                         xpt_release_bus(bus);
4160         }
4161         return (status);
4162 }
4163
4164 static void
4165 xpt_release_path(struct cam_path *path)
4166 {
4167         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
4168         if (path->device != NULL) {
4169                 xpt_release_device(path->bus, path->target, path->device);
4170                 path->device = NULL;
4171         }
4172         if (path->target != NULL) {
4173                 xpt_release_target(path->bus, path->target);
4174                 path->target = NULL;
4175         }
4176         if (path->bus != NULL) {
4177                 xpt_release_bus(path->bus);
4178                 path->bus = NULL;
4179         }
4180 }
4181
4182 void
4183 xpt_free_path(struct cam_path *path)
4184 {
4185         GIANT_REQUIRED;
4186
4187         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
4188         xpt_release_path(path);
4189         free(path, M_CAMXPT);
4190 }
4191
4192
4193 /*
4194  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
4195  * in path1, 2 for match with wildcards in path2.
4196  */
4197 int
4198 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
4199 {
4200         GIANT_REQUIRED;
4201
4202         int retval = 0;
4203
4204         if (path1->bus != path2->bus) {
4205                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
4206                         retval = 1;
4207                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
4208                         retval = 2;
4209                 else
4210                         return (-1);
4211         }
4212         if (path1->target != path2->target) {
4213                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
4214                         if (retval == 0)
4215                                 retval = 1;
4216                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
4217                         retval = 2;
4218                 else
4219                         return (-1);
4220         }
4221         if (path1->device != path2->device) {
4222                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
4223                         if (retval == 0)
4224                                 retval = 1;
4225                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
4226                         retval = 2;
4227                 else
4228                         return (-1);
4229         }
4230         return (retval);
4231 }
4232
4233 void
4234 xpt_print_path(struct cam_path *path)
4235 {
4236         GIANT_REQUIRED;
4237
4238         if (path == NULL)
4239                 printf("(nopath): ");
4240         else {
4241                 if (path->periph != NULL)
4242                         printf("(%s%d:", path->periph->periph_name,
4243                                path->periph->unit_number);
4244                 else
4245                         printf("(noperiph:");
4246
4247                 if (path->bus != NULL)
4248                         printf("%s%d:%d:", path->bus->sim->sim_name,
4249                                path->bus->sim->unit_number,
4250                                path->bus->sim->bus_id);
4251                 else
4252                         printf("nobus:");
4253
4254                 if (path->target != NULL)
4255                         printf("%d:", path->target->target_id);
4256                 else
4257                         printf("X:");
4258
4259                 if (path->device != NULL)
4260                         printf("%d): ", path->device->lun_id);
4261                 else
4262                         printf("X): ");
4263         }
4264 }
4265
4266 int
4267 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
4268 {
4269         struct sbuf sb;
4270
4271         GIANT_REQUIRED;
4272
4273         sbuf_new(&sb, str, str_len, 0);
4274
4275         if (path == NULL)
4276                 sbuf_printf(&sb, "(nopath): ");
4277         else {
4278                 if (path->periph != NULL)
4279                         sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
4280                                     path->periph->unit_number);
4281                 else
4282                         sbuf_printf(&sb, "(noperiph:");
4283
4284                 if (path->bus != NULL)
4285                         sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
4286                                     path->bus->sim->unit_number,
4287                                     path->bus->sim->bus_id);
4288                 else
4289                         sbuf_printf(&sb, "nobus:");
4290
4291                 if (path->target != NULL)
4292                         sbuf_printf(&sb, "%d:", path->target->target_id);
4293                 else
4294                         sbuf_printf(&sb, "X:");
4295
4296                 if (path->device != NULL)
4297                         sbuf_printf(&sb, "%d): ", path->device->lun_id);
4298                 else
4299                         sbuf_printf(&sb, "X): ");
4300         }
4301         sbuf_finish(&sb);
4302
4303         return(sbuf_len(&sb));
4304 }
4305
4306 path_id_t
4307 xpt_path_path_id(struct cam_path *path)
4308 {
4309         GIANT_REQUIRED;
4310
4311         return(path->bus->path_id);
4312 }
4313
4314 target_id_t
4315 xpt_path_target_id(struct cam_path *path)
4316 {
4317         GIANT_REQUIRED;
4318
4319         if (path->target != NULL)
4320                 return (path->target->target_id);
4321         else
4322                 return (CAM_TARGET_WILDCARD);
4323 }
4324
4325 lun_id_t
4326 xpt_path_lun_id(struct cam_path *path)
4327 {
4328         GIANT_REQUIRED;
4329
4330         if (path->device != NULL)
4331                 return (path->device->lun_id);
4332         else
4333                 return (CAM_LUN_WILDCARD);
4334 }
4335
4336 struct cam_sim *
4337 xpt_path_sim(struct cam_path *path)
4338 {
4339         GIANT_REQUIRED;
4340
4341         return (path->bus->sim);
4342 }
4343
4344 struct cam_periph*
4345 xpt_path_periph(struct cam_path *path)
4346 {
4347         GIANT_REQUIRED;
4348
4349         return (path->periph);
4350 }
4351
4352 /*
4353  * Release a CAM control block for the caller.  Remit the cost of the structure
4354  * to the device referenced by the path.  If the this device had no 'credits'
4355  * and peripheral drivers have registered async callbacks for this notification
4356  * call them now.
4357  */
4358 void
4359 xpt_release_ccb(union ccb *free_ccb)
4360 {
4361         int      s;
4362         struct   cam_path *path;
4363         struct   cam_ed *device;
4364         struct   cam_eb *bus;
4365
4366         GIANT_REQUIRED;
4367
4368         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
4369         path = free_ccb->ccb_h.path;
4370         device = path->device;
4371         bus = path->bus;
4372         s = splsoftcam();
4373         cam_ccbq_release_opening(&device->ccbq);
4374         if (xpt_ccb_count > xpt_max_ccbs) {
4375                 xpt_free_ccb(free_ccb);
4376                 xpt_ccb_count--;
4377         } else {
4378                 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle);
4379         }
4380         if (bus->sim->devq == NULL) {
4381                 splx(s);
4382                 return;
4383         }
4384         bus->sim->devq->alloc_openings++;
4385         bus->sim->devq->alloc_active--;
4386         /* XXX Turn this into an inline function - xpt_run_device?? */
4387         if ((device_is_alloc_queued(device) == 0)
4388          && (device->drvq.entries > 0)) {
4389                 xpt_schedule_dev_allocq(bus, device);
4390         }
4391         splx(s);
4392         if (dev_allocq_is_runnable(bus->sim->devq))
4393                 xpt_run_dev_allocq(bus);
4394 }
4395
4396 /* Functions accessed by SIM drivers */
4397
4398 /*
4399  * A sim structure, listing the SIM entry points and instance
4400  * identification info is passed to xpt_bus_register to hook the SIM
4401  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
4402  * for this new bus and places it in the array of busses and assigns
4403  * it a path_id.  The path_id may be influenced by "hard wiring"
4404  * information specified by the user.  Once interrupt services are
4405  * availible, the bus will be probed.
4406  */
4407 int32_t
4408 xpt_bus_register(struct cam_sim *sim, u_int32_t bus)
4409 {
4410         struct cam_eb *new_bus;
4411         struct cam_eb *old_bus;
4412         struct ccb_pathinq cpi;
4413         int s;
4414
4415         GIANT_REQUIRED;
4416
4417         sim->bus_id = bus;
4418         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4419                                           M_CAMXPT, M_NOWAIT);
4420         if (new_bus == NULL) {
4421                 /* Couldn't satisfy request */
4422                 return (CAM_RESRC_UNAVAIL);
4423         }
4424
4425         if (strcmp(sim->sim_name, "xpt") != 0) {
4426
4427                 sim->path_id =
4428                     xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4429         }
4430
4431         TAILQ_INIT(&new_bus->et_entries);
4432         new_bus->path_id = sim->path_id;
4433         new_bus->sim = sim;
4434         timevalclear(&new_bus->last_reset);
4435         new_bus->flags = 0;
4436         new_bus->refcount = 1;  /* Held until a bus_deregister event */
4437         new_bus->generation = 0;
4438         s = splcam();
4439         old_bus = TAILQ_FIRST(&xpt_busses);
4440         while (old_bus != NULL
4441             && old_bus->path_id < new_bus->path_id)
4442                 old_bus = TAILQ_NEXT(old_bus, links);
4443         if (old_bus != NULL)
4444                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4445         else
4446                 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links);
4447         bus_generation++;
4448         splx(s);
4449
4450         /* Notify interested parties */
4451         if (sim->path_id != CAM_XPT_PATH_ID) {
4452                 struct cam_path path;
4453
4454                 xpt_compile_path(&path, /*periph*/NULL, sim->path_id,
4455                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4456                 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
4457                 cpi.ccb_h.func_code = XPT_PATH_INQ;
4458                 xpt_action((union ccb *)&cpi);
4459                 xpt_async(AC_PATH_REGISTERED, &path, &cpi);
4460                 xpt_release_path(&path);
4461         }
4462         return (CAM_SUCCESS);
4463 }
4464
4465 int32_t
4466 xpt_bus_deregister(path_id_t pathid)
4467 {
4468         struct cam_path bus_path;
4469         struct cam_ed *device;
4470         struct cam_ed_qinfo *qinfo;
4471         struct cam_devq *devq;
4472         struct cam_periph *periph;
4473         struct cam_sim *ccbsim;
4474         union ccb *work_ccb;
4475         cam_status status;
4476
4477         GIANT_REQUIRED;
4478
4479         status = xpt_compile_path(&bus_path, NULL, pathid,
4480                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4481         if (status != CAM_REQ_CMP)
4482                 return (status);
4483
4484         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4485         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4486
4487         /* The SIM may be gone, so use a dummy SIM for any stray operations. */
4488         devq = bus_path.bus->sim->devq;
4489         bus_path.bus->sim = &cam_dead_sim;
4490
4491         /* Execute any pending operations now. */
4492         while ((qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
4493             CAMQ_HEAD)) != NULL ||
4494             (qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
4495             CAMQ_HEAD)) != NULL) {
4496                 do {
4497                         device = qinfo->device;
4498                         work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
4499                         if (work_ccb != NULL) {
4500                                 devq->active_dev = device;
4501                                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
4502                                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
4503                                 ccbsim = work_ccb->ccb_h.path->bus->sim;
4504                                 (*(ccbsim->sim_action))(ccbsim, work_ccb);
4505                         }
4506
4507                         periph = (struct cam_periph *)camq_remove(&device->drvq,
4508                             CAMQ_HEAD);
4509                         if (periph != NULL)
4510                                 xpt_schedule(periph, periph->pinfo.priority);
4511                 } while (work_ccb != NULL || periph != NULL);
4512         }
4513
4514         /* Make sure all completed CCBs are processed. */
4515         while (!TAILQ_EMPTY(&cam_bioq)) {
4516                 camisr(&cam_bioq);
4517
4518                 /* Repeat the async's for the benefit of any new devices. */
4519                 xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4520                 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4521         }
4522
4523         /* Release the reference count held while registered. */
4524         xpt_release_bus(bus_path.bus);
4525         xpt_release_path(&bus_path);
4526
4527         /* Recheck for more completed CCBs. */
4528         while (!TAILQ_EMPTY(&cam_bioq))
4529                 camisr(&cam_bioq);
4530
4531         return (CAM_REQ_CMP);
4532 }
4533
4534 static path_id_t
4535 xptnextfreepathid(void)
4536 {
4537         struct cam_eb *bus;
4538         path_id_t pathid;
4539         const char *strval;
4540
4541         pathid = 0;
4542         bus = TAILQ_FIRST(&xpt_busses);
4543 retry:
4544         /* Find an unoccupied pathid */
4545         while (bus != NULL
4546             && bus->path_id <= pathid) {
4547                 if (bus->path_id == pathid)
4548                         pathid++;
4549                 bus = TAILQ_NEXT(bus, links);
4550         }
4551
4552         /*
4553          * Ensure that this pathid is not reserved for
4554          * a bus that may be registered in the future.
4555          */
4556         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4557                 ++pathid;
4558                 /* Start the search over */
4559                 goto retry;
4560         }
4561         return (pathid);
4562 }
4563
4564 static path_id_t
4565 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4566 {
4567         path_id_t pathid;
4568         int i, dunit, val;
4569         char buf[32];
4570         const char *dname;
4571
4572         pathid = CAM_XPT_PATH_ID;
4573         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4574         i = 0;
4575         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4576                 if (strcmp(dname, "scbus")) {
4577                         /* Avoid a bit of foot shooting. */
4578                         continue;
4579                 }
4580                 if (dunit < 0)          /* unwired?! */
4581                         continue;
4582                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4583                         if (sim_bus == val) {
4584                                 pathid = dunit;
4585                                 break;
4586                         }
4587                 } else if (sim_bus == 0) {
4588                         /* Unspecified matches bus 0 */
4589                         pathid = dunit;
4590                         break;
4591                 } else {
4592                         printf("Ambiguous scbus configuration for %s%d "
4593                                "bus %d, cannot wire down.  The kernel "
4594                                "config entry for scbus%d should "
4595                                "specify a controller bus.\n"
4596                                "Scbus will be assigned dynamically.\n",
4597                                sim_name, sim_unit, sim_bus, dunit);
4598                         break;
4599                 }
4600         }
4601
4602         if (pathid == CAM_XPT_PATH_ID)
4603                 pathid = xptnextfreepathid();
4604         return (pathid);
4605 }
4606
4607 void
4608 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4609 {
4610         struct cam_eb *bus;
4611         struct cam_et *target, *next_target;
4612         struct cam_ed *device, *next_device;
4613         int s;
4614
4615         GIANT_REQUIRED;
4616
4617         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n"));
4618
4619         /*
4620          * Most async events come from a CAM interrupt context.  In
4621          * a few cases, the error recovery code at the peripheral layer,
4622          * which may run from our SWI or a process context, may signal
4623          * deferred events with a call to xpt_async. Ensure async
4624          * notifications are serialized by blocking cam interrupts.
4625          */
4626         s = splcam();
4627
4628         bus = path->bus;
4629
4630         if (async_code == AC_BUS_RESET) {
4631                 int s;
4632
4633                 s = splclock();
4634                 /* Update our notion of when the last reset occurred */
4635                 microtime(&bus->last_reset);
4636                 splx(s);
4637         }
4638
4639         for (target = TAILQ_FIRST(&bus->et_entries);
4640              target != NULL;
4641              target = next_target) {
4642
4643                 next_target = TAILQ_NEXT(target, links);
4644
4645                 if (path->target != target
4646                  && path->target->target_id != CAM_TARGET_WILDCARD
4647                  && target->target_id != CAM_TARGET_WILDCARD)
4648                         continue;
4649
4650                 if (async_code == AC_SENT_BDR) {
4651                         int s;
4652
4653                         /* Update our notion of when the last reset occurred */
4654                         s = splclock();
4655                         microtime(&path->target->last_reset);
4656                         splx(s);
4657                 }
4658
4659                 for (device = TAILQ_FIRST(&target->ed_entries);
4660                      device != NULL;
4661                      device = next_device) {
4662
4663                         next_device = TAILQ_NEXT(device, links);
4664
4665                         if (path->device != device
4666                          && path->device->lun_id != CAM_LUN_WILDCARD
4667                          && device->lun_id != CAM_LUN_WILDCARD)
4668                                 continue;
4669
4670                         xpt_dev_async(async_code, bus, target,
4671                                       device, async_arg);
4672
4673                         xpt_async_bcast(&device->asyncs, async_code,
4674                                         path, async_arg);
4675                 }
4676         }
4677
4678         /*
4679          * If this wasn't a fully wildcarded async, tell all
4680          * clients that want all async events.
4681          */
4682         if (bus != xpt_periph->path->bus)
4683                 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code,
4684                                 path, async_arg);
4685         splx(s);
4686 }
4687
4688 static void
4689 xpt_async_bcast(struct async_list *async_head,
4690                 u_int32_t async_code,
4691                 struct cam_path *path, void *async_arg)
4692 {
4693         struct async_node *cur_entry;
4694
4695         cur_entry = SLIST_FIRST(async_head);
4696         while (cur_entry != NULL) {
4697                 struct async_node *next_entry;
4698                 /*
4699                  * Grab the next list entry before we call the current
4700                  * entry's callback.  This is because the callback function
4701                  * can delete its async callback entry.
4702                  */
4703                 next_entry = SLIST_NEXT(cur_entry, links);
4704                 if ((cur_entry->event_enable & async_code) != 0)
4705                         cur_entry->callback(cur_entry->callback_arg,
4706                                             async_code, path,
4707                                             async_arg);
4708                 cur_entry = next_entry;
4709         }
4710 }
4711
4712 /*
4713  * Handle any per-device event notifications that require action by the XPT.
4714  */
4715 static void
4716 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target,
4717               struct cam_ed *device, void *async_arg)
4718 {
4719         cam_status status;
4720         struct cam_path newpath;
4721
4722         /*
4723          * We only need to handle events for real devices.
4724          */
4725         if (target->target_id == CAM_TARGET_WILDCARD
4726          || device->lun_id == CAM_LUN_WILDCARD)
4727                 return;
4728
4729         /*
4730          * We need our own path with wildcards expanded to
4731          * handle certain types of events.
4732          */
4733         if ((async_code == AC_SENT_BDR)
4734          || (async_code == AC_BUS_RESET)
4735          || (async_code == AC_INQ_CHANGED))
4736                 status = xpt_compile_path(&newpath, NULL,
4737                                           bus->path_id,
4738                                           target->target_id,
4739                                           device->lun_id);
4740         else
4741                 status = CAM_REQ_CMP_ERR;
4742
4743         if (status == CAM_REQ_CMP) {
4744
4745                 /*
4746                  * Allow transfer negotiation to occur in a
4747                  * tag free environment.
4748                  */
4749                 if (async_code == AC_SENT_BDR
4750                  || async_code == AC_BUS_RESET)
4751                         xpt_toggle_tags(&newpath);
4752
4753                 if (async_code == AC_INQ_CHANGED) {
4754                         /*
4755                          * We've sent a start unit command, or
4756                          * something similar to a device that
4757                          * may have caused its inquiry data to
4758                          * change. So we re-scan the device to
4759                          * refresh the inquiry data for it.
4760                          */
4761                         xpt_scan_lun(newpath.periph, &newpath,
4762                                      CAM_EXPECT_INQ_CHANGE, NULL);
4763                 }
4764                 xpt_release_path(&newpath);
4765         } else if (async_code == AC_LOST_DEVICE) {
4766                 device->flags |= CAM_DEV_UNCONFIGURED;
4767         } else if (async_code == AC_TRANSFER_NEG) {
4768                 struct ccb_trans_settings *settings;
4769
4770                 settings = (struct ccb_trans_settings *)async_arg;
4771                 xpt_set_transfer_settings(settings, device,
4772                                           /*async_update*/TRUE);
4773         }
4774 }
4775
4776 u_int32_t
4777 xpt_freeze_devq(struct cam_path *path, u_int count)
4778 {
4779         int s;
4780         struct ccb_hdr *ccbh;
4781
4782         GIANT_REQUIRED;
4783
4784         s = splcam();
4785         path->device->qfrozen_cnt += count;
4786
4787         /*
4788          * Mark the last CCB in the queue as needing
4789          * to be requeued if the driver hasn't
4790          * changed it's state yet.  This fixes a race
4791          * where a ccb is just about to be queued to
4792          * a controller driver when it's interrupt routine
4793          * freezes the queue.  To completly close the
4794          * hole, controller drives must check to see
4795          * if a ccb's status is still CAM_REQ_INPROG
4796          * under spl protection just before they queue
4797          * the CCB.  See ahc_action/ahc_freeze_devq for
4798          * an example.
4799          */
4800         ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq);
4801         if (ccbh && ccbh->status == CAM_REQ_INPROG)
4802                 ccbh->status = CAM_REQUEUE_REQ;
4803         splx(s);
4804         return (path->device->qfrozen_cnt);
4805 }
4806
4807 u_int32_t
4808 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4809 {
4810         GIANT_REQUIRED;
4811
4812         sim->devq->send_queue.qfrozen_cnt += count;
4813         if (sim->devq->active_dev != NULL) {
4814                 struct ccb_hdr *ccbh;
4815
4816                 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs,
4817                                   ccb_hdr_tailq);
4818                 if (ccbh && ccbh->status == CAM_REQ_INPROG)
4819                         ccbh->status = CAM_REQUEUE_REQ;
4820         }
4821         return (sim->devq->send_queue.qfrozen_cnt);
4822 }
4823
4824 static void
4825 xpt_release_devq_timeout(void *arg)
4826 {
4827         struct cam_ed *device;
4828
4829         device = (struct cam_ed *)arg;
4830
4831         xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE);
4832 }
4833
4834 void
4835 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4836 {
4837         GIANT_REQUIRED;
4838
4839         xpt_release_devq_device(path->device, count, run_queue);
4840 }
4841
4842 static void
4843 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4844 {
4845         int     rundevq;
4846         int     s0, s1;
4847
4848         rundevq = 0;
4849         s0 = splsoftcam();
4850         s1 = splcam();
4851         if (dev->qfrozen_cnt > 0) {
4852
4853                 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count;
4854                 dev->qfrozen_cnt -= count;
4855                 if (dev->qfrozen_cnt == 0) {
4856
4857                         /*
4858                          * No longer need to wait for a successful
4859                          * command completion.
4860                          */
4861                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4862
4863                         /*
4864                          * Remove any timeouts that might be scheduled
4865                          * to release this queue.
4866                          */
4867                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4868                                 untimeout(xpt_release_devq_timeout, dev,
4869                                           dev->c_handle);
4870                                 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4871                         }
4872
4873                         /*
4874                          * Now that we are unfrozen schedule the
4875                          * device so any pending transactions are
4876                          * run.
4877                          */
4878                         if ((dev->ccbq.queue.entries > 0)
4879                          && (xpt_schedule_dev_sendq(dev->target->bus, dev))
4880                          && (run_queue != 0)) {
4881                                 rundevq = 1;
4882                         }
4883                 }
4884         }
4885         splx(s1);
4886         if (rundevq != 0)
4887                 xpt_run_dev_sendq(dev->target->bus);
4888         splx(s0);
4889 }
4890
4891 void
4892 xpt_release_simq(struct cam_sim *sim, int run_queue)
4893 {
4894         int     s;
4895         struct  camq *sendq;
4896
4897         GIANT_REQUIRED;
4898
4899         sendq = &(sim->devq->send_queue);
4900         s = splcam();
4901         if (sendq->qfrozen_cnt > 0) {
4902
4903                 sendq->qfrozen_cnt--;
4904                 if (sendq->qfrozen_cnt == 0) {
4905                         struct cam_eb *bus;
4906
4907                         /*
4908                          * If there is a timeout scheduled to release this
4909                          * sim queue, remove it.  The queue frozen count is
4910                          * already at 0.
4911                          */
4912                         if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4913                                 untimeout(xpt_release_simq_timeout, sim,
4914                                           sim->c_handle);
4915                                 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4916                         }
4917                         bus = xpt_find_bus(sim->path_id);
4918                         splx(s);
4919
4920                         if (run_queue) {
4921                                 /*
4922                                  * Now that we are unfrozen run the send queue.
4923                                  */
4924                                 xpt_run_dev_sendq(bus);
4925                         }
4926                         xpt_release_bus(bus);
4927                 } else
4928                         splx(s);
4929         } else
4930                 splx(s);
4931 }
4932
4933 static void
4934 xpt_release_simq_timeout(void *arg)
4935 {
4936         struct cam_sim *sim;
4937
4938         sim = (struct cam_sim *)arg;
4939         xpt_release_simq(sim, /* run_queue */ TRUE);
4940 }
4941
4942 void
4943 xpt_done(union ccb *done_ccb)
4944 {
4945         int s;
4946
4947         s = splcam();
4948
4949         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4950         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) {
4951                 /*
4952                  * Queue up the request for handling by our SWI handler
4953                  * any of the "non-immediate" type of ccbs.
4954                  */
4955                 switch (done_ccb->ccb_h.path->periph->type) {
4956                 case CAM_PERIPH_BIO:
4957                         mtx_lock(&cam_bioq_lock);
4958                         TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h,
4959                                           sim_links.tqe);
4960                         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4961                         mtx_unlock(&cam_bioq_lock);
4962                         swi_sched(cambio_ih, 0);
4963                         break;
4964                 default:
4965                         panic("unknown periph type %d",
4966                             done_ccb->ccb_h.path->periph->type);
4967                 }
4968         }
4969         splx(s);
4970 }
4971
4972 union ccb *
4973 xpt_alloc_ccb()
4974 {
4975         union ccb *new_ccb;
4976
4977         GIANT_REQUIRED;
4978
4979         new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_WAITOK);
4980         return (new_ccb);
4981 }
4982
4983 union ccb *
4984 xpt_alloc_ccb_nowait()
4985 {
4986         union ccb *new_ccb;
4987
4988         GIANT_REQUIRED;
4989
4990         new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_NOWAIT);
4991         return (new_ccb);
4992 }
4993
4994 void
4995 xpt_free_ccb(union ccb *free_ccb)
4996 {
4997         free(free_ccb, M_CAMXPT);
4998 }
4999
5000
5001
5002 /* Private XPT functions */
5003
5004 /*
5005  * Get a CAM control block for the caller. Charge the structure to the device
5006  * referenced by the path.  If the this device has no 'credits' then the
5007  * device already has the maximum number of outstanding operations under way
5008  * and we return NULL. If we don't have sufficient resources to allocate more
5009  * ccbs, we also return NULL.
5010  */
5011 static union ccb *
5012 xpt_get_ccb(struct cam_ed *device)
5013 {
5014         union ccb *new_ccb;
5015         int s;
5016
5017         s = splsoftcam();
5018         if ((new_ccb = (union ccb *)SLIST_FIRST(&ccb_freeq)) == NULL) {
5019                 new_ccb = xpt_alloc_ccb_nowait();
5020                 if (new_ccb == NULL) {
5021                         splx(s);
5022                         return (NULL);
5023                 }
5024                 callout_handle_init(&new_ccb->ccb_h.timeout_ch);
5025                 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h,
5026                                   xpt_links.sle);
5027                 xpt_ccb_count++;
5028         }
5029         cam_ccbq_take_opening(&device->ccbq);
5030         SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle);
5031         splx(s);
5032         return (new_ccb);
5033 }
5034
5035 static void
5036 xpt_release_bus(struct cam_eb *bus)
5037 {
5038         int s;
5039
5040         s = splcam();
5041         if ((--bus->refcount == 0)
5042          && (TAILQ_FIRST(&bus->et_entries) == NULL)) {
5043                 TAILQ_REMOVE(&xpt_busses, bus, links);
5044                 bus_generation++;
5045                 splx(s);
5046                 free(bus, M_CAMXPT);
5047         } else
5048                 splx(s);
5049 }
5050
5051 static struct cam_et *
5052 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
5053 {
5054         struct cam_et *target;
5055
5056         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, M_NOWAIT);
5057         if (target != NULL) {
5058                 struct cam_et *cur_target;
5059
5060                 TAILQ_INIT(&target->ed_entries);
5061                 target->bus = bus;
5062                 target->target_id = target_id;
5063                 target->refcount = 1;
5064                 target->generation = 0;
5065                 timevalclear(&target->last_reset);
5066                 /*
5067                  * Hold a reference to our parent bus so it
5068                  * will not go away before we do.
5069                  */
5070                 bus->refcount++;
5071
5072                 /* Insertion sort into our bus's target list */
5073                 cur_target = TAILQ_FIRST(&bus->et_entries);
5074                 while (cur_target != NULL && cur_target->target_id < target_id)
5075                         cur_target = TAILQ_NEXT(cur_target, links);
5076
5077                 if (cur_target != NULL) {
5078                         TAILQ_INSERT_BEFORE(cur_target, target, links);
5079                 } else {
5080                         TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
5081                 }
5082                 bus->generation++;
5083         }
5084         return (target);
5085 }
5086
5087 static void
5088 xpt_release_target(struct cam_eb *bus, struct cam_et *target)
5089 {
5090         int s;
5091
5092         s = splcam();
5093         if ((--target->refcount == 0)
5094          && (TAILQ_FIRST(&target->ed_entries) == NULL)) {
5095                 TAILQ_REMOVE(&bus->et_entries, target, links);
5096                 bus->generation++;
5097                 splx(s);
5098                 free(target, M_CAMXPT);
5099                 xpt_release_bus(bus);
5100         } else
5101                 splx(s);
5102 }
5103
5104 static struct cam_ed *
5105 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
5106 {
5107 #ifdef CAM_NEW_TRAN_CODE
5108         struct     cam_path path;
5109 #endif /* CAM_NEW_TRAN_CODE */
5110         struct     cam_ed *device;
5111         struct     cam_devq *devq;
5112         cam_status status;
5113
5114         if (SIM_DEAD(bus->sim))
5115                 return (NULL);
5116
5117         /* Make space for us in the device queue on our bus */
5118         devq = bus->sim->devq;
5119         status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1);
5120
5121         if (status != CAM_REQ_CMP) {
5122                 device = NULL;
5123         } else {
5124                 device = (struct cam_ed *)malloc(sizeof(*device),
5125                                                  M_CAMXPT, M_NOWAIT);
5126         }
5127
5128         if (device != NULL) {
5129                 struct cam_ed *cur_device;
5130
5131                 cam_init_pinfo(&device->alloc_ccb_entry.pinfo);
5132                 device->alloc_ccb_entry.device = device;
5133                 cam_init_pinfo(&device->send_ccb_entry.pinfo);
5134                 device->send_ccb_entry.device = device;
5135                 device->target = target;
5136                 device->lun_id = lun_id;
5137                 /* Initialize our queues */
5138                 if (camq_init(&device->drvq, 0) != 0) {
5139                         free(device, M_CAMXPT);
5140                         return (NULL);
5141                 }
5142                 if (cam_ccbq_init(&device->ccbq,
5143                                   bus->sim->max_dev_openings) != 0) {
5144                         camq_fini(&device->drvq);
5145                         free(device, M_CAMXPT);
5146                         return (NULL);
5147                 }
5148                 SLIST_INIT(&device->asyncs);
5149                 SLIST_INIT(&device->periphs);
5150                 device->generation = 0;
5151                 device->owner = NULL;
5152                 /*
5153                  * Take the default quirk entry until we have inquiry
5154                  * data and can determine a better quirk to use.
5155                  */
5156                 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1];
5157                 bzero(&device->inq_data, sizeof(device->inq_data));
5158                 device->inq_flags = 0;
5159                 device->queue_flags = 0;
5160                 device->serial_num = NULL;
5161                 device->serial_num_len = 0;
5162                 device->qfrozen_cnt = 0;
5163                 device->flags = CAM_DEV_UNCONFIGURED;
5164                 device->tag_delay_count = 0;
5165                 device->tag_saved_openings = 0;
5166                 device->refcount = 1;
5167                 callout_handle_init(&device->c_handle);
5168
5169                 /*
5170                  * Hold a reference to our parent target so it
5171                  * will not go away before we do.
5172                  */
5173                 target->refcount++;
5174
5175                 /*
5176                  * XXX should be limited by number of CCBs this bus can
5177                  * do.
5178                  */
5179                 xpt_max_ccbs += device->ccbq.devq_openings;
5180                 /* Insertion sort into our target's device list */
5181                 cur_device = TAILQ_FIRST(&target->ed_entries);
5182                 while (cur_device != NULL && cur_device->lun_id < lun_id)
5183                         cur_device = TAILQ_NEXT(cur_device, links);
5184                 if (cur_device != NULL) {
5185                         TAILQ_INSERT_BEFORE(cur_device, device, links);
5186                 } else {
5187                         TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
5188                 }
5189                 target->generation++;
5190 #ifdef CAM_NEW_TRAN_CODE
5191                 if (lun_id != CAM_LUN_WILDCARD) {
5192                         xpt_compile_path(&path,
5193                                          NULL,
5194                                          bus->path_id,
5195                                          target->target_id,
5196                                          lun_id);
5197                         xpt_devise_transport(&path);
5198                         xpt_release_path(&path);
5199                 }
5200 #endif /* CAM_NEW_TRAN_CODE */
5201         }
5202         return (device);
5203 }
5204
5205 static void
5206 xpt_release_device(struct cam_eb *bus, struct cam_et *target,
5207                    struct cam_ed *device)
5208 {
5209         int s;
5210
5211         s = splcam();
5212         if ((--device->refcount == 0)
5213          && ((device->flags & CAM_DEV_UNCONFIGURED) != 0)) {
5214                 struct cam_devq *devq;
5215
5216                 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX
5217                  || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX)
5218                         panic("Removing device while still queued for ccbs");
5219
5220                 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
5221                                 untimeout(xpt_release_devq_timeout, device,
5222                                           device->c_handle);
5223
5224                 TAILQ_REMOVE(&target->ed_entries, device,links);
5225                 target->generation++;
5226                 xpt_max_ccbs -= device->ccbq.devq_openings;
5227                 if (!SIM_DEAD(bus->sim)) {
5228                         /* Release our slot in the devq */
5229                         devq = bus->sim->devq;
5230                         cam_devq_resize(devq, devq->alloc_queue.array_size - 1);
5231                 }
5232                 splx(s);
5233                 camq_fini(&device->drvq);
5234                 camq_fini(&device->ccbq.queue);
5235                 free(device, M_CAMXPT);
5236                 xpt_release_target(bus, target);
5237         } else
5238                 splx(s);
5239 }
5240
5241 static u_int32_t
5242 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
5243 {
5244         int     s;
5245         int     diff;
5246         int     result;
5247         struct  cam_ed *dev;
5248
5249         dev = path->device;
5250         s = splsoftcam();
5251
5252         diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings);
5253         result = cam_ccbq_resize(&dev->ccbq, newopenings);
5254         if (result == CAM_REQ_CMP && (diff < 0)) {
5255                 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED;
5256         }
5257         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5258          || (dev->inq_flags & SID_CmdQue) != 0)
5259                 dev->tag_saved_openings = newopenings;
5260         /* Adjust the global limit */
5261         xpt_max_ccbs += diff;
5262         splx(s);
5263         return (result);
5264 }
5265
5266 static struct cam_eb *
5267 xpt_find_bus(path_id_t path_id)
5268 {
5269         struct cam_eb *bus;
5270
5271         for (bus = TAILQ_FIRST(&xpt_busses);
5272              bus != NULL;
5273              bus = TAILQ_NEXT(bus, links)) {
5274                 if (bus->path_id == path_id) {
5275                         bus->refcount++;
5276                         break;
5277                 }
5278         }
5279         return (bus);
5280 }
5281
5282 static struct cam_et *
5283 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5284 {
5285         struct cam_et *target;
5286
5287         for (target = TAILQ_FIRST(&bus->et_entries);
5288              target != NULL;
5289              target = TAILQ_NEXT(target, links)) {
5290                 if (target->target_id == target_id) {
5291                         target->refcount++;
5292                         break;
5293                 }
5294         }
5295         return (target);
5296 }
5297
5298 static struct cam_ed *
5299 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5300 {
5301         struct cam_ed *device;
5302
5303         for (device = TAILQ_FIRST(&target->ed_entries);
5304              device != NULL;
5305              device = TAILQ_NEXT(device, links)) {
5306                 if (device->lun_id == lun_id) {
5307                         device->refcount++;
5308                         break;
5309                 }
5310         }
5311         return (device);
5312 }
5313
5314 typedef struct {
5315         union   ccb *request_ccb;
5316         struct  ccb_pathinq *cpi;
5317         int     pending_count;
5318 } xpt_scan_bus_info;
5319
5320 /*
5321  * To start a scan, request_ccb is an XPT_SCAN_BUS ccb.
5322  * As the scan progresses, xpt_scan_bus is used as the
5323  * callback on completion function.
5324  */
5325 static void
5326 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb)
5327 {
5328         CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
5329                   ("xpt_scan_bus\n"));
5330         switch (request_ccb->ccb_h.func_code) {
5331         case XPT_SCAN_BUS:
5332         {
5333                 xpt_scan_bus_info *scan_info;
5334                 union   ccb *work_ccb;
5335                 struct  cam_path *path;
5336                 u_int   i;
5337                 u_int   max_target;
5338                 u_int   initiator_id;
5339
5340                 /* Find out the characteristics of the bus */
5341                 work_ccb = xpt_alloc_ccb();
5342                 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path,
5343                               request_ccb->ccb_h.pinfo.priority);
5344                 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
5345                 xpt_action(work_ccb);
5346                 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
5347                         request_ccb->ccb_h.status = work_ccb->ccb_h.status;
5348                         xpt_free_ccb(work_ccb);
5349                         xpt_done(request_ccb);
5350                         return;
5351                 }
5352
5353                 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) {
5354                         /*
5355                          * Can't scan the bus on an adapter that
5356                          * cannot perform the initiator role.
5357                          */
5358                         request_ccb->ccb_h.status = CAM_REQ_CMP;
5359                         xpt_free_ccb(work_ccb);
5360                         xpt_done(request_ccb);
5361                         return;
5362                 }
5363
5364                 /* Save some state for use while we probe for devices */
5365                 scan_info = (xpt_scan_bus_info *)
5366                     malloc(sizeof(xpt_scan_bus_info), M_TEMP, M_WAITOK);
5367                 scan_info->request_ccb = request_ccb;
5368                 scan_info->cpi = &work_ccb->cpi;
5369
5370                 /* Cache on our stack so we can work asynchronously */
5371                 max_target = scan_info->cpi->max_target;
5372                 initiator_id = scan_info->cpi->initiator_id;
5373
5374                 /*
5375                  * Don't count the initiator if the
5376                  * initiator is addressable.
5377                  */
5378                 scan_info->pending_count = max_target + 1;
5379                 if (initiator_id <= max_target)
5380                         scan_info->pending_count--;
5381
5382                 for (i = 0; i <= max_target; i++) {
5383                         cam_status status;
5384                         if (i == initiator_id)
5385                                 continue;
5386
5387                         status = xpt_create_path(&path, xpt_periph,
5388                                                  request_ccb->ccb_h.path_id,
5389                                                  i, 0);
5390                         if (status != CAM_REQ_CMP) {
5391                                 printf("xpt_scan_bus: xpt_create_path failed"
5392                                        " with status %#x, bus scan halted\n",
5393                                        status);
5394                                 break;
5395                         }
5396                         work_ccb = xpt_alloc_ccb();
5397                         xpt_setup_ccb(&work_ccb->ccb_h, path,
5398                                       request_ccb->ccb_h.pinfo.priority);
5399                         work_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5400                         work_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5401                         work_ccb->ccb_h.ppriv_ptr0 = scan_info;
5402                         work_ccb->crcn.flags = request_ccb->crcn.flags;
5403                         xpt_action(work_ccb);
5404                 }
5405                 break;
5406         }
5407         case XPT_SCAN_LUN:
5408         {
5409                 xpt_scan_bus_info *scan_info;
5410                 path_id_t path_id;
5411                 target_id_t target_id;
5412                 lun_id_t lun_id;
5413
5414                 /* Reuse the same CCB to query if a device was really found */
5415                 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0;
5416                 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path,
5417                               request_ccb->ccb_h.pinfo.priority);
5418                 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
5419
5420                 path_id = request_ccb->ccb_h.path_id;
5421                 target_id = request_ccb->ccb_h.target_id;
5422                 lun_id = request_ccb->ccb_h.target_lun;
5423                 xpt_action(request_ccb);
5424
5425                 if (request_ccb->ccb_h.status != CAM_REQ_CMP) {
5426                         struct cam_ed *device;
5427                         struct cam_et *target;
5428                         int s, phl;
5429
5430                         /*
5431                          * If we already probed lun 0 successfully, or
5432                          * we have additional configured luns on this
5433                          * target that might have "gone away", go onto
5434                          * the next lun.
5435                          */
5436                         target = request_ccb->ccb_h.path->target;
5437                         /*
5438                          * We may touch devices that we don't
5439                          * hold references too, so ensure they
5440                          * don't disappear out from under us.
5441                          * The target above is referenced by the
5442                          * path in the request ccb.
5443                          */
5444                         phl = 0;
5445                         s = splcam();
5446                         device = TAILQ_FIRST(&target->ed_entries);
5447                         if (device != NULL) {
5448                                 phl = CAN_SRCH_HI_SPARSE(device);
5449                                 if (device->lun_id == 0)
5450                                         device = TAILQ_NEXT(device, links);
5451                         }
5452                         splx(s);
5453                         if ((lun_id != 0) || (device != NULL)) {
5454                                 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl)
5455                                         lun_id++;
5456                         }
5457                 } else {
5458                         struct cam_ed *device;
5459
5460                         device = request_ccb->ccb_h.path->device;
5461
5462                         if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) {
5463                                 /* Try the next lun */
5464                                 if (lun_id < (CAM_SCSI2_MAXLUN-1)
5465                                   || CAN_SRCH_HI_DENSE(device))
5466                                         lun_id++;
5467                         }
5468                 }
5469
5470                 xpt_free_path(request_ccb->ccb_h.path);
5471
5472                 /* Check Bounds */
5473                 if ((lun_id == request_ccb->ccb_h.target_lun)
5474                  || lun_id > scan_info->cpi->max_lun) {
5475                         /* We're done */
5476
5477                         xpt_free_ccb(request_ccb);
5478                         scan_info->pending_count--;
5479                         if (scan_info->pending_count == 0) {
5480                                 xpt_free_ccb((union ccb *)scan_info->cpi);
5481                                 request_ccb = scan_info->request_ccb;
5482                                 free(scan_info, M_TEMP);
5483                                 request_ccb->ccb_h.status = CAM_REQ_CMP;
5484                                 xpt_done(request_ccb);
5485                         }
5486                 } else {
5487                         /* Try the next device */
5488                         struct cam_path *path;
5489                         cam_status status;
5490
5491                         status = xpt_create_path(&path, xpt_periph,
5492                                                  path_id, target_id, lun_id);
5493                         if (status != CAM_REQ_CMP) {
5494                                 printf("xpt_scan_bus: xpt_create_path failed "
5495                                        "with status %#x, halting LUN scan\n",
5496                                        status);
5497                                 xpt_free_ccb(request_ccb);
5498                                 scan_info->pending_count--;
5499                                 if (scan_info->pending_count == 0) {
5500                                         xpt_free_ccb(
5501                                                 (union ccb *)scan_info->cpi);
5502                                         request_ccb = scan_info->request_ccb;
5503                                         free(scan_info, M_TEMP);
5504                                         request_ccb->ccb_h.status = CAM_REQ_CMP;
5505                                         xpt_done(request_ccb);
5506                                 }
5507                                 break;
5508                         }
5509                         xpt_setup_ccb(&request_ccb->ccb_h, path,
5510                                       request_ccb->ccb_h.pinfo.priority);
5511                         request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5512                         request_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5513                         request_ccb->ccb_h.ppriv_ptr0 = scan_info;
5514                         request_ccb->crcn.flags =
5515                                 scan_info->request_ccb->crcn.flags;
5516                         xpt_action(request_ccb);
5517                 }
5518                 break;
5519         }
5520         default:
5521                 break;
5522         }
5523 }
5524
5525 typedef enum {
5526         PROBE_TUR,
5527         PROBE_INQUIRY,
5528         PROBE_FULL_INQUIRY,
5529         PROBE_MODE_SENSE,
5530         PROBE_SERIAL_NUM,
5531         PROBE_TUR_FOR_NEGOTIATION
5532 } probe_action;
5533
5534 typedef enum {
5535         PROBE_INQUIRY_CKSUM     = 0x01,
5536         PROBE_SERIAL_CKSUM      = 0x02,
5537         PROBE_NO_ANNOUNCE       = 0x04
5538 } probe_flags;
5539
5540 typedef struct {
5541         TAILQ_HEAD(, ccb_hdr) request_ccbs;
5542         probe_action    action;
5543         union ccb       saved_ccb;
5544         probe_flags     flags;
5545         MD5_CTX         context;
5546         u_int8_t        digest[16];
5547 } probe_softc;
5548
5549 static void
5550 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path,
5551              cam_flags flags, union ccb *request_ccb)
5552 {
5553         struct ccb_pathinq cpi;
5554         cam_status status;
5555         struct cam_path *new_path;
5556         struct cam_periph *old_periph;
5557         int s;
5558
5559         CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
5560                   ("xpt_scan_lun\n"));
5561
5562         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
5563         cpi.ccb_h.func_code = XPT_PATH_INQ;
5564         xpt_action((union ccb *)&cpi);
5565
5566         if (cpi.ccb_h.status != CAM_REQ_CMP) {
5567                 if (request_ccb != NULL) {
5568                         request_ccb->ccb_h.status = cpi.ccb_h.status;
5569                         xpt_done(request_ccb);
5570                 }
5571                 return;
5572         }
5573
5574         if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) {
5575                 /*
5576                  * Can't scan the bus on an adapter that
5577                  * cannot perform the initiator role.
5578                  */
5579                 if (request_ccb != NULL) {
5580                         request_ccb->ccb_h.status = CAM_REQ_CMP;
5581                         xpt_done(request_ccb);
5582                 }
5583                 return;
5584         }
5585
5586         if (request_ccb == NULL) {
5587                 request_ccb = malloc(sizeof(union ccb), M_TEMP, M_NOWAIT);
5588                 if (request_ccb == NULL) {
5589                         xpt_print_path(path);
5590                         printf("xpt_scan_lun: can't allocate CCB, can't "
5591                                "continue\n");
5592                         return;
5593                 }
5594                 new_path = malloc(sizeof(*new_path), M_TEMP, M_NOWAIT);
5595                 if (new_path == NULL) {
5596                         xpt_print_path(path);
5597                         printf("xpt_scan_lun: can't allocate path, can't "
5598                                "continue\n");
5599                         free(request_ccb, M_TEMP);
5600                         return;
5601                 }
5602                 status = xpt_compile_path(new_path, xpt_periph,
5603                                           path->bus->path_id,
5604                                           path->target->target_id,
5605                                           path->device->lun_id);
5606
5607                 if (status != CAM_REQ_CMP) {
5608                         xpt_print_path(path);
5609                         printf("xpt_scan_lun: can't compile path, can't "
5610                                "continue\n");
5611                         free(request_ccb, M_TEMP);
5612                         free(new_path, M_TEMP);
5613                         return;
5614                 }
5615                 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1);
5616                 request_ccb->ccb_h.cbfcnp = xptscandone;
5617                 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5618                 request_ccb->crcn.flags = flags;
5619         }
5620
5621         s = splsoftcam();
5622         if ((old_periph = cam_periph_find(path, "probe")) != NULL) {
5623                 probe_softc *softc;
5624
5625                 softc = (probe_softc *)old_periph->softc;
5626                 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5627                                   periph_links.tqe);
5628         } else {
5629                 status = cam_periph_alloc(proberegister, NULL, probecleanup,
5630                                           probestart, "probe",
5631                                           CAM_PERIPH_BIO,
5632                                           request_ccb->ccb_h.path, NULL, 0,
5633                                           request_ccb);
5634
5635                 if (status != CAM_REQ_CMP) {
5636                         xpt_print_path(path);
5637                         printf("xpt_scan_lun: cam_alloc_periph returned an "
5638                                "error, can't continue probe\n");
5639                         request_ccb->ccb_h.status = status;
5640                         xpt_done(request_ccb);
5641                 }
5642         }
5643         splx(s);
5644 }
5645
5646 static void
5647 xptscandone(struct cam_periph *periph, union ccb *done_ccb)
5648 {
5649         xpt_release_path(done_ccb->ccb_h.path);
5650         free(done_ccb->ccb_h.path, M_TEMP);
5651         free(done_ccb, M_TEMP);
5652 }
5653
5654 static cam_status
5655 proberegister(struct cam_periph *periph, void *arg)
5656 {
5657         union ccb *request_ccb; /* CCB representing the probe request */
5658         probe_softc *softc;
5659
5660         request_ccb = (union ccb *)arg;
5661         if (periph == NULL) {
5662                 printf("proberegister: periph was NULL!!\n");
5663                 return(CAM_REQ_CMP_ERR);
5664         }
5665
5666         if (request_ccb == NULL) {
5667                 printf("proberegister: no probe CCB, "
5668                        "can't register device\n");
5669                 return(CAM_REQ_CMP_ERR);
5670         }
5671
5672         softc = (probe_softc *)malloc(sizeof(*softc), M_TEMP, M_NOWAIT);
5673
5674         if (softc == NULL) {
5675                 printf("proberegister: Unable to probe new device. "
5676                        "Unable to allocate softc\n");
5677                 return(CAM_REQ_CMP_ERR);
5678         }
5679         TAILQ_INIT(&softc->request_ccbs);
5680         TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5681                           periph_links.tqe);
5682         softc->flags = 0;
5683         periph->softc = softc;
5684         cam_periph_acquire(periph);
5685         /*
5686          * Ensure we've waited at least a bus settle
5687          * delay before attempting to probe the device.
5688          * For HBAs that don't do bus resets, this won't make a difference.
5689          */
5690         cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset,
5691                                       scsi_delay);
5692         probeschedule(periph);
5693         return(CAM_REQ_CMP);
5694 }
5695
5696 static void
5697 probeschedule(struct cam_periph *periph)
5698 {
5699         struct ccb_pathinq cpi;
5700         union ccb *ccb;
5701         probe_softc *softc;
5702
5703         softc = (probe_softc *)periph->softc;
5704         ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
5705
5706         xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
5707         cpi.ccb_h.func_code = XPT_PATH_INQ;
5708         xpt_action((union ccb *)&cpi);
5709
5710         /*
5711          * If a device has gone away and another device, or the same one,
5712          * is back in the same place, it should have a unit attention
5713          * condition pending.  It will not report the unit attention in
5714          * response to an inquiry, which may leave invalid transfer
5715          * negotiations in effect.  The TUR will reveal the unit attention
5716          * condition.  Only send the TUR for lun 0, since some devices
5717          * will get confused by commands other than inquiry to non-existent
5718          * luns.  If you think a device has gone away start your scan from
5719          * lun 0.  This will insure that any bogus transfer settings are
5720          * invalidated.
5721          *
5722          * If we haven't seen the device before and the controller supports
5723          * some kind of transfer negotiation, negotiate with the first
5724          * sent command if no bus reset was performed at startup.  This
5725          * ensures that the device is not confused by transfer negotiation
5726          * settings left over by loader or BIOS action.
5727          */
5728         if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
5729          && (ccb->ccb_h.target_lun == 0)) {
5730                 softc->action = PROBE_TUR;
5731         } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0
5732               && (cpi.hba_misc & PIM_NOBUSRESET) != 0) {
5733                 proberequestdefaultnegotiation(periph);
5734                 softc->action = PROBE_INQUIRY;
5735         } else {
5736                 softc->action = PROBE_INQUIRY;
5737         }
5738
5739         if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE)
5740                 softc->flags |= PROBE_NO_ANNOUNCE;
5741         else
5742                 softc->flags &= ~PROBE_NO_ANNOUNCE;
5743
5744         xpt_schedule(periph, ccb->ccb_h.pinfo.priority);
5745 }
5746
5747 static void
5748 probestart(struct cam_periph *periph, union ccb *start_ccb)
5749 {
5750         /* Probe the device that our peripheral driver points to */
5751         struct ccb_scsiio *csio;
5752         probe_softc *softc;
5753
5754         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n"));
5755
5756         softc = (probe_softc *)periph->softc;
5757         csio = &start_ccb->csio;
5758
5759         switch (softc->action) {
5760         case PROBE_TUR:
5761         case PROBE_TUR_FOR_NEGOTIATION:
5762         {
5763                 scsi_test_unit_ready(csio,
5764                                      /*retries*/4,
5765                                      probedone,
5766                                      MSG_SIMPLE_Q_TAG,
5767                                      SSD_FULL_SIZE,
5768                                      /*timeout*/60000);
5769                 break;
5770         }
5771         case PROBE_INQUIRY:
5772         case PROBE_FULL_INQUIRY:
5773         {
5774                 u_int inquiry_len;
5775                 struct scsi_inquiry_data *inq_buf;
5776
5777                 inq_buf = &periph->path->device->inq_data;
5778                 /*
5779                  * If the device is currently configured, we calculate an
5780                  * MD5 checksum of the inquiry data, and if the serial number
5781                  * length is greater than 0, add the serial number data
5782                  * into the checksum as well.  Once the inquiry and the
5783                  * serial number check finish, we attempt to figure out
5784                  * whether we still have the same device.
5785                  */
5786                 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
5787
5788                         MD5Init(&softc->context);
5789                         MD5Update(&softc->context, (unsigned char *)inq_buf,
5790                                   sizeof(struct scsi_inquiry_data));
5791                         softc->flags |= PROBE_INQUIRY_CKSUM;
5792                         if (periph->path->device->serial_num_len > 0) {
5793                                 MD5Update(&softc->context,
5794                                           periph->path->device->serial_num,
5795                                           periph->path->device->serial_num_len);
5796                                 softc->flags |= PROBE_SERIAL_CKSUM;
5797                         }
5798                         MD5Final(softc->digest, &softc->context);
5799                 }
5800
5801                 if (softc->action == PROBE_INQUIRY)
5802                         inquiry_len = SHORT_INQUIRY_LENGTH;
5803                 else
5804                         inquiry_len = inq_buf->additional_length
5805                                     + offsetof(struct scsi_inquiry_data,
5806                                                additional_length) + 1;
5807
5808                 /*
5809                  * Some parallel SCSI devices fail to send an
5810                  * ignore wide residue message when dealing with
5811                  * odd length inquiry requests.  Round up to be
5812                  * safe.
5813                  */
5814                 inquiry_len = roundup2(inquiry_len, 2);
5815
5816                 scsi_inquiry(csio,
5817                              /*retries*/4,
5818                              probedone,
5819                              MSG_SIMPLE_Q_TAG,
5820                              (u_int8_t *)inq_buf,
5821                              inquiry_len,
5822                              /*evpd*/FALSE,
5823                              /*page_code*/0,
5824                              SSD_MIN_SIZE,
5825                              /*timeout*/60 * 1000);
5826                 break;
5827         }
5828         case PROBE_MODE_SENSE:
5829         {
5830                 void  *mode_buf;
5831                 int    mode_buf_len;
5832
5833                 mode_buf_len = sizeof(struct scsi_mode_header_6)
5834                              + sizeof(struct scsi_mode_blk_desc)
5835                              + sizeof(struct scsi_control_page);
5836                 mode_buf = malloc(mode_buf_len, M_TEMP, M_NOWAIT);
5837                 if (mode_buf != NULL) {
5838                         scsi_mode_sense(csio,
5839                                         /*retries*/4,
5840                                         probedone,
5841                                         MSG_SIMPLE_Q_TAG,
5842                                         /*dbd*/FALSE,
5843                                         SMS_PAGE_CTRL_CURRENT,
5844                                         SMS_CONTROL_MODE_PAGE,
5845                                         mode_buf,
5846                                         mode_buf_len,
5847                                         SSD_FULL_SIZE,
5848                                         /*timeout*/60000);
5849                         break;
5850                 }
5851                 xpt_print_path(periph->path);
5852                 printf("Unable to mode sense control page - malloc failure\n");
5853                 softc->action = PROBE_SERIAL_NUM;
5854         }
5855         /* FALLTHROUGH */
5856         case PROBE_SERIAL_NUM:
5857         {
5858                 struct scsi_vpd_unit_serial_number *serial_buf;
5859                 struct cam_ed* device;
5860
5861                 serial_buf = NULL;
5862                 device = periph->path->device;
5863                 device->serial_num = NULL;
5864                 device->serial_num_len = 0;
5865
5866                 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0)
5867                         serial_buf = (struct scsi_vpd_unit_serial_number *)
5868                                 malloc(sizeof(*serial_buf), M_TEMP,
5869                                         M_NOWAIT | M_ZERO);
5870
5871                 if (serial_buf != NULL) {
5872                         scsi_inquiry(csio,
5873                                      /*retries*/4,
5874                                      probedone,
5875                                      MSG_SIMPLE_Q_TAG,
5876                                      (u_int8_t *)serial_buf,
5877                                      sizeof(*serial_buf),
5878                                      /*evpd*/TRUE,
5879                                      SVPD_UNIT_SERIAL_NUMBER,
5880                                      SSD_MIN_SIZE,
5881                                      /*timeout*/60 * 1000);
5882                         break;
5883                 }
5884                 /*
5885                  * We'll have to do without, let our probedone
5886                  * routine finish up for us.
5887                  */
5888                 start_ccb->csio.data_ptr = NULL;
5889                 probedone(periph, start_ccb);
5890                 return;
5891         }
5892         }
5893         xpt_action(start_ccb);
5894 }
5895
5896 static void
5897 proberequestdefaultnegotiation(struct cam_periph *periph)
5898 {
5899         struct ccb_trans_settings cts;
5900
5901         xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1);
5902         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
5903 #ifdef CAM_NEW_TRAN_CODE
5904         cts.type = CTS_TYPE_USER_SETTINGS;
5905 #else /* CAM_NEW_TRAN_CODE */
5906         cts.flags = CCB_TRANS_USER_SETTINGS;
5907 #endif /* CAM_NEW_TRAN_CODE */
5908         xpt_action((union ccb *)&cts);
5909         cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
5910 #ifdef CAM_NEW_TRAN_CODE
5911         cts.type = CTS_TYPE_CURRENT_SETTINGS;
5912 #else /* CAM_NEW_TRAN_CODE */
5913         cts.flags &= ~CCB_TRANS_USER_SETTINGS;
5914         cts.flags |= CCB_TRANS_CURRENT_SETTINGS;
5915 #endif /* CAM_NEW_TRAN_CODE */
5916         xpt_action((union ccb *)&cts);
5917 }
5918
5919 static void
5920 probedone(struct cam_periph *periph, union ccb *done_ccb)
5921 {
5922         probe_softc *softc;
5923         struct cam_path *path;
5924         u_int32_t  priority;
5925
5926         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n"));
5927
5928         softc = (probe_softc *)periph->softc;
5929         path = done_ccb->ccb_h.path;
5930         priority = done_ccb->ccb_h.pinfo.priority;
5931
5932         switch (softc->action) {
5933         case PROBE_TUR:
5934         {
5935                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
5936
5937                         if (cam_periph_error(done_ccb, 0,
5938                                              SF_NO_PRINT, NULL) == ERESTART)
5939                                 return;
5940                         else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
5941                                 /* Don't wedge the queue */
5942                                 xpt_release_devq(done_ccb->ccb_h.path,
5943                                                  /*count*/1,
5944                                                  /*run_queue*/TRUE);
5945                 }
5946                 softc->action = PROBE_INQUIRY;
5947                 xpt_release_ccb(done_ccb);
5948                 xpt_schedule(periph, priority);
5949                 return;
5950         }
5951         case PROBE_INQUIRY:
5952         case PROBE_FULL_INQUIRY:
5953         {
5954                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
5955                         struct scsi_inquiry_data *inq_buf;
5956                         u_int8_t periph_qual;
5957
5958                         path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID;
5959                         inq_buf = &path->device->inq_data;
5960
5961                         periph_qual = SID_QUAL(inq_buf);
5962
5963                         switch(periph_qual) {
5964                         case SID_QUAL_LU_CONNECTED:
5965                         {
5966                                 u_int8_t len;
5967
5968                                 /*
5969                                  * We conservatively request only
5970                                  * SHORT_INQUIRY_LEN bytes of inquiry
5971                                  * information during our first try
5972                                  * at sending an INQUIRY. If the device
5973                                  * has more information to give,
5974                                  * perform a second request specifying
5975                                  * the amount of information the device
5976                                  * is willing to give.
5977                                  */
5978                                 len = inq_buf->additional_length
5979                                     + offsetof(struct scsi_inquiry_data,
5980                                                additional_length) + 1;
5981                                 if (softc->action == PROBE_INQUIRY
5982                                  && len > SHORT_INQUIRY_LENGTH) {
5983                                         softc->action = PROBE_FULL_INQUIRY;
5984                                         xpt_release_ccb(done_ccb);
5985                                         xpt_schedule(periph, priority);
5986                                         return;
5987                                 }
5988
5989                                 xpt_find_quirk(path->device);
5990
5991 #ifdef CAM_NEW_TRAN_CODE
5992                                 xpt_devise_transport(path);
5993 #endif /* CAM_NEW_TRAN_CODE */
5994                                 if ((inq_buf->flags & SID_CmdQue) != 0)
5995                                         softc->action = PROBE_MODE_SENSE;
5996                                 else
5997                                         softc->action = PROBE_SERIAL_NUM;
5998
5999                                 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
6000
6001                                 xpt_release_ccb(done_ccb);
6002                                 xpt_schedule(periph, priority);
6003                                 return;
6004                         }
6005                         default:
6006                                 break;
6007                         }
6008                 } else if (cam_periph_error(done_ccb, 0,
6009                                             done_ccb->ccb_h.target_lun > 0
6010                                             ? SF_RETRY_UA|SF_QUIET_IR
6011                                             : SF_RETRY_UA,
6012                                             &softc->saved_ccb) == ERESTART) {
6013                         return;
6014                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6015                         /* Don't wedge the queue */
6016                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6017                                          /*run_queue*/TRUE);
6018                 }
6019                 /*
6020                  * If we get to this point, we got an error status back
6021                  * from the inquiry and the error status doesn't require
6022                  * automatically retrying the command.  Therefore, the
6023                  * inquiry failed.  If we had inquiry information before
6024                  * for this device, but this latest inquiry command failed,
6025                  * the device has probably gone away.  If this device isn't
6026                  * already marked unconfigured, notify the peripheral
6027                  * drivers that this device is no more.
6028                  */
6029                 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
6030                         /* Send the async notification. */
6031                         xpt_async(AC_LOST_DEVICE, path, NULL);
6032
6033                 xpt_release_ccb(done_ccb);
6034                 break;
6035         }
6036         case PROBE_MODE_SENSE:
6037         {
6038                 struct ccb_scsiio *csio;
6039                 struct scsi_mode_header_6 *mode_hdr;
6040
6041                 csio = &done_ccb->csio;
6042                 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr;
6043                 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
6044                         struct scsi_control_page *page;
6045                         u_int8_t *offset;
6046
6047                         offset = ((u_int8_t *)&mode_hdr[1])
6048                             + mode_hdr->blk_desc_len;
6049                         page = (struct scsi_control_page *)offset;
6050                         path->device->queue_flags = page->queue_flags;
6051                 } else if (cam_periph_error(done_ccb, 0,
6052                                             SF_RETRY_UA|SF_NO_PRINT,
6053                                             &softc->saved_ccb) == ERESTART) {
6054                         return;
6055                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6056                         /* Don't wedge the queue */
6057                         xpt_release_devq(done_ccb->ccb_h.path,
6058                                          /*count*/1, /*run_queue*/TRUE);
6059                 }
6060                 xpt_release_ccb(done_ccb);
6061                 free(mode_hdr, M_TEMP);
6062                 softc->action = PROBE_SERIAL_NUM;
6063                 xpt_schedule(periph, priority);
6064                 return;
6065         }
6066         case PROBE_SERIAL_NUM:
6067         {
6068                 struct ccb_scsiio *csio;
6069                 struct scsi_vpd_unit_serial_number *serial_buf;
6070                 u_int32_t  priority;
6071                 int changed;
6072                 int have_serialnum;
6073
6074                 changed = 1;
6075                 have_serialnum = 0;
6076                 csio = &done_ccb->csio;
6077                 priority = done_ccb->ccb_h.pinfo.priority;
6078                 serial_buf =
6079                     (struct scsi_vpd_unit_serial_number *)csio->data_ptr;
6080
6081                 /* Clean up from previous instance of this device */
6082                 if (path->device->serial_num != NULL) {
6083                         free(path->device->serial_num, M_CAMXPT);
6084                         path->device->serial_num = NULL;
6085                         path->device->serial_num_len = 0;
6086                 }
6087
6088                 if (serial_buf == NULL) {
6089                         /*
6090                          * Don't process the command as it was never sent
6091                          */
6092                 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
6093                         && (serial_buf->length > 0)) {
6094
6095                         have_serialnum = 1;
6096                         path->device->serial_num =
6097                                 (u_int8_t *)malloc((serial_buf->length + 1),
6098                                                    M_CAMXPT, M_NOWAIT);
6099                         if (path->device->serial_num != NULL) {
6100                                 bcopy(serial_buf->serial_num,
6101                                       path->device->serial_num,
6102                                       serial_buf->length);
6103                                 path->device->serial_num_len =
6104                                     serial_buf->length;
6105                                 path->device->serial_num[serial_buf->length]
6106                                     = '\0';
6107                         }
6108                 } else if (cam_periph_error(done_ccb, 0,
6109                                             SF_RETRY_UA|SF_NO_PRINT,
6110                                             &softc->saved_ccb) == ERESTART) {
6111                         return;
6112                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6113                         /* Don't wedge the queue */
6114                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6115                                          /*run_queue*/TRUE);
6116                 }
6117
6118                 /*
6119                  * Let's see if we have seen this device before.
6120                  */
6121                 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) {
6122                         MD5_CTX context;
6123                         u_int8_t digest[16];
6124
6125                         MD5Init(&context);
6126
6127                         MD5Update(&context,
6128                                   (unsigned char *)&path->device->inq_data,
6129                                   sizeof(struct scsi_inquiry_data));
6130
6131                         if (have_serialnum)
6132                                 MD5Update(&context, serial_buf->serial_num,
6133                                           serial_buf->length);
6134
6135                         MD5Final(digest, &context);
6136                         if (bcmp(softc->digest, digest, 16) == 0)
6137                                 changed = 0;
6138
6139                         /*
6140                          * XXX Do we need to do a TUR in order to ensure
6141                          *     that the device really hasn't changed???
6142                          */
6143                         if ((changed != 0)
6144                          && ((softc->flags & PROBE_NO_ANNOUNCE) == 0))
6145                                 xpt_async(AC_LOST_DEVICE, path, NULL);
6146                 }
6147                 if (serial_buf != NULL)
6148                         free(serial_buf, M_TEMP);
6149
6150                 if (changed != 0) {
6151                         /*
6152                          * Now that we have all the necessary
6153                          * information to safely perform transfer
6154                          * negotiations... Controllers don't perform
6155                          * any negotiation or tagged queuing until
6156                          * after the first XPT_SET_TRAN_SETTINGS ccb is
6157                          * received.  So, on a new device, just retreive
6158                          * the user settings, and set them as the current
6159                          * settings to set the device up.
6160                          */
6161                         proberequestdefaultnegotiation(periph);
6162                         xpt_release_ccb(done_ccb);
6163
6164                         /*
6165                          * Perform a TUR to allow the controller to
6166                          * perform any necessary transfer negotiation.
6167                          */
6168                         softc->action = PROBE_TUR_FOR_NEGOTIATION;
6169                         xpt_schedule(periph, priority);
6170                         return;
6171                 }
6172                 xpt_release_ccb(done_ccb);
6173                 break;
6174         }
6175         case PROBE_TUR_FOR_NEGOTIATION:
6176                 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6177                         /* Don't wedge the queue */
6178                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6179                                          /*run_queue*/TRUE);
6180                 }
6181
6182                 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
6183
6184                 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) {
6185                         /* Inform the XPT that a new device has been found */
6186                         done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
6187                         xpt_action(done_ccb);
6188
6189                         xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path,
6190                                   done_ccb);
6191                 }
6192                 xpt_release_ccb(done_ccb);
6193                 break;
6194         }
6195         done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
6196         TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe);
6197         done_ccb->ccb_h.status = CAM_REQ_CMP;
6198         xpt_done(done_ccb);
6199         if (TAILQ_FIRST(&softc->request_ccbs) == NULL) {
6200                 cam_periph_invalidate(periph);
6201                 cam_periph_release(periph);
6202         } else {
6203                 probeschedule(periph);
6204         }
6205 }
6206
6207 static void
6208 probecleanup(struct cam_periph *periph)
6209 {
6210         free(periph->softc, M_TEMP);
6211 }
6212
6213 static void
6214 xpt_find_quirk(struct cam_ed *device)
6215 {
6216         caddr_t match;
6217
6218         match = cam_quirkmatch((caddr_t)&device->inq_data,
6219                                (caddr_t)xpt_quirk_table,
6220                                sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table),
6221                                sizeof(*xpt_quirk_table), scsi_inquiry_match);
6222
6223         if (match == NULL)
6224                 panic("xpt_find_quirk: device didn't match wildcard entry!!");
6225
6226         device->quirk = (struct xpt_quirk_entry *)match;
6227 }
6228
6229 static int
6230 sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS)
6231 {
6232         int error, bool;
6233
6234         bool = cam_srch_hi;
6235         error = sysctl_handle_int(oidp, &bool, sizeof(bool), req);
6236         if (error != 0 || req->newptr == NULL)
6237                 return (error);
6238         if (bool == 0 || bool == 1) {
6239                 cam_srch_hi = bool;
6240                 return (0);
6241         } else {
6242                 return (EINVAL);
6243         }
6244 }
6245
6246 #ifdef CAM_NEW_TRAN_CODE
6247
6248 static void
6249 xpt_devise_transport(struct cam_path *path)
6250 {
6251         struct ccb_pathinq cpi;
6252         struct ccb_trans_settings cts;
6253         struct scsi_inquiry_data *inq_buf;
6254
6255         /* Get transport information from the SIM */
6256         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
6257         cpi.ccb_h.func_code = XPT_PATH_INQ;
6258         xpt_action((union ccb *)&cpi);
6259
6260         inq_buf = NULL;
6261         if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0)
6262                 inq_buf = &path->device->inq_data;
6263         path->device->protocol = PROTO_SCSI;
6264         path->device->protocol_version =
6265             inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version;
6266         path->device->transport = cpi.transport;
6267         path->device->transport_version = cpi.transport_version;
6268
6269         /*
6270          * Any device not using SPI3 features should
6271          * be considered SPI2 or lower.
6272          */
6273         if (inq_buf != NULL) {
6274                 if (path->device->transport == XPORT_SPI
6275                  && (inq_buf->spi3data & SID_SPI_MASK) == 0
6276                  && path->device->transport_version > 2)
6277                         path->device->transport_version = 2;
6278         } else {
6279                 struct cam_ed* otherdev;
6280
6281                 for (otherdev = TAILQ_FIRST(&path->target->ed_entries);
6282                      otherdev != NULL;
6283                      otherdev = TAILQ_NEXT(otherdev, links)) {
6284                         if (otherdev != path->device)
6285                                 break;
6286                 }
6287
6288                 if (otherdev != NULL) {
6289                         /*
6290                          * Initially assume the same versioning as
6291                          * prior luns for this target.
6292                          */
6293                         path->device->protocol_version =
6294                             otherdev->protocol_version;
6295                         path->device->transport_version =
6296                             otherdev->transport_version;
6297                 } else {
6298                         /* Until we know better, opt for safty */
6299                         path->device->protocol_version = 2;
6300                         if (path->device->transport == XPORT_SPI)
6301                                 path->device->transport_version = 2;
6302                         else
6303                                 path->device->transport_version = 0;
6304                 }
6305         }
6306
6307         /*
6308          * XXX
6309          * For a device compliant with SPC-2 we should be able
6310          * to determine the transport version supported by
6311          * scrutinizing the version descriptors in the
6312          * inquiry buffer.
6313          */
6314
6315         /* Tell the controller what we think */
6316         xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
6317         cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
6318         cts.type = CTS_TYPE_CURRENT_SETTINGS;
6319         cts.transport = path->device->transport;
6320         cts.transport_version = path->device->transport_version;
6321         cts.protocol = path->device->protocol;
6322         cts.protocol_version = path->device->protocol_version;
6323         cts.proto_specific.valid = 0;
6324         cts.xport_specific.valid = 0;
6325         xpt_action((union ccb *)&cts);
6326 }
6327
6328 static void
6329 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device,
6330                           int async_update)
6331 {
6332         struct  ccb_pathinq cpi;
6333         struct  ccb_trans_settings cur_cts;
6334         struct  ccb_trans_settings_scsi *scsi;
6335         struct  ccb_trans_settings_scsi *cur_scsi;
6336         struct  cam_sim *sim;
6337         struct  scsi_inquiry_data *inq_data;
6338
6339         if (device == NULL) {
6340                 cts->ccb_h.status = CAM_PATH_INVALID;
6341                 xpt_done((union ccb *)cts);
6342                 return;
6343         }
6344
6345         if (cts->protocol == PROTO_UNKNOWN
6346          || cts->protocol == PROTO_UNSPECIFIED) {
6347                 cts->protocol = device->protocol;
6348                 cts->protocol_version = device->protocol_version;
6349         }
6350
6351         if (cts->protocol_version == PROTO_VERSION_UNKNOWN
6352          || cts->protocol_version == PROTO_VERSION_UNSPECIFIED)
6353                 cts->protocol_version = device->protocol_version;
6354
6355         if (cts->protocol != device->protocol) {
6356                 xpt_print_path(cts->ccb_h.path);
6357                 printf("Uninitialized Protocol %x:%x?\n",
6358                        cts->protocol, device->protocol);
6359                 cts->protocol = device->protocol;
6360         }
6361
6362         if (cts->protocol_version > device->protocol_version) {
6363                 if (bootverbose) {
6364                         xpt_print_path(cts->ccb_h.path);
6365                         printf("Down reving Protocol Version from %d to %d?\n",
6366                                cts->protocol_version, device->protocol_version);
6367                 }
6368                 cts->protocol_version = device->protocol_version;
6369         }
6370
6371         if (cts->transport == XPORT_UNKNOWN
6372          || cts->transport == XPORT_UNSPECIFIED) {
6373                 cts->transport = device->transport;
6374                 cts->transport_version = device->transport_version;
6375         }
6376
6377         if (cts->transport_version == XPORT_VERSION_UNKNOWN
6378          || cts->transport_version == XPORT_VERSION_UNSPECIFIED)
6379                 cts->transport_version = device->transport_version;
6380
6381         if (cts->transport != device->transport) {
6382                 xpt_print_path(cts->ccb_h.path);
6383                 printf("Uninitialized Transport %x:%x?\n",
6384                        cts->transport, device->transport);
6385                 cts->transport = device->transport;
6386         }
6387
6388         if (cts->transport_version > device->transport_version) {
6389                 if (bootverbose) {
6390                         xpt_print_path(cts->ccb_h.path);
6391                         printf("Down reving Transport Version from %d to %d?\n",
6392                                cts->transport_version,
6393                                device->transport_version);
6394                 }
6395                 cts->transport_version = device->transport_version;
6396         }
6397
6398         sim = cts->ccb_h.path->bus->sim;
6399
6400         /*
6401          * Nothing more of interest to do unless
6402          * this is a device connected via the
6403          * SCSI protocol.
6404          */
6405         if (cts->protocol != PROTO_SCSI) {
6406                 if (async_update == FALSE)
6407                         (*(sim->sim_action))(sim, (union ccb *)cts);
6408                 return;
6409         }
6410
6411         inq_data = &device->inq_data;
6412         scsi = &cts->proto_specific.scsi;
6413         xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1);
6414         cpi.ccb_h.func_code = XPT_PATH_INQ;
6415         xpt_action((union ccb *)&cpi);
6416
6417         /* SCSI specific sanity checking */
6418         if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0
6419          || (inq_data->flags & SID_CmdQue) == 0
6420          || (device->queue_flags & SCP_QUEUE_DQUE) != 0
6421          || (device->quirk->mintags == 0)) {
6422                 /*
6423                  * Can't tag on hardware that doesn't support tags,
6424                  * doesn't have it enabled, or has broken tag support.
6425                  */
6426                 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6427         }
6428
6429         if (async_update == FALSE) {
6430                 /*
6431                  * Perform sanity checking against what the
6432                  * controller and device can do.
6433                  */
6434                 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1);
6435                 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
6436                 cur_cts.type = cts->type;
6437                 xpt_action((union ccb *)&cur_cts);
6438
6439                 cur_scsi = &cur_cts.proto_specific.scsi;
6440                 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) {
6441                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6442                         scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB;
6443                 }
6444                 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0)
6445                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6446         }
6447
6448         /* SPI specific sanity checking */
6449         if (cts->transport == XPORT_SPI && async_update == FALSE) {
6450                 u_int spi3caps;
6451                 struct ccb_trans_settings_spi *spi;
6452                 struct ccb_trans_settings_spi *cur_spi;
6453
6454                 spi = &cts->xport_specific.spi;
6455
6456                 cur_spi = &cur_cts.xport_specific.spi;
6457
6458                 /* Fill in any gaps in what the user gave us */
6459                 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
6460                         spi->sync_period = cur_spi->sync_period;
6461                 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
6462                         spi->sync_period = 0;
6463                 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
6464                         spi->sync_offset = cur_spi->sync_offset;
6465                 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
6466                         spi->sync_offset = 0;
6467                 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
6468                         spi->ppr_options = cur_spi->ppr_options;
6469                 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
6470                         spi->ppr_options = 0;
6471                 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
6472                         spi->bus_width = cur_spi->bus_width;
6473                 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
6474                         spi->bus_width = 0;
6475                 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) {
6476                         spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
6477                         spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB;
6478                 }
6479                 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0)
6480                         spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
6481                 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6482                   && (inq_data->flags & SID_Sync) == 0
6483                   && cts->type == CTS_TYPE_CURRENT_SETTINGS)
6484                  || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)
6485                  || (cur_spi->sync_offset == 0)
6486                  || (cur_spi->sync_period == 0)) {
6487                         /* Force async */
6488                         spi->sync_period = 0;
6489                         spi->sync_offset = 0;
6490                 }
6491
6492                 switch (spi->bus_width) {
6493                 case MSG_EXT_WDTR_BUS_32_BIT:
6494                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6495                           || (inq_data->flags & SID_WBus32) != 0
6496                           || cts->type == CTS_TYPE_USER_SETTINGS)
6497                          && (cpi.hba_inquiry & PI_WIDE_32) != 0)
6498                                 break;
6499                         /* Fall Through to 16-bit */
6500                 case MSG_EXT_WDTR_BUS_16_BIT:
6501                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6502                           || (inq_data->flags & SID_WBus16) != 0
6503                           || cts->type == CTS_TYPE_USER_SETTINGS)
6504                          && (cpi.hba_inquiry & PI_WIDE_16) != 0) {
6505                                 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
6506                                 break;
6507                         }
6508                         /* Fall Through to 8-bit */
6509                 default: /* New bus width?? */
6510                 case MSG_EXT_WDTR_BUS_8_BIT:
6511                         /* All targets can do this */
6512                         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
6513                         break;
6514                 }
6515
6516                 spi3caps = cpi.xport_specific.spi.ppr_options;
6517                 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6518                  && cts->type == CTS_TYPE_CURRENT_SETTINGS)
6519                         spi3caps &= inq_data->spi3data;
6520
6521                 if ((spi3caps & SID_SPI_CLOCK_DT) == 0)
6522                         spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ;
6523
6524                 if ((spi3caps & SID_SPI_IUS) == 0)
6525                         spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ;
6526
6527                 if ((spi3caps & SID_SPI_QAS) == 0)
6528                         spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ;
6529
6530                 /* No SPI Transfer settings are allowed unless we are wide */
6531                 if (spi->bus_width == 0)
6532                         spi->ppr_options = 0;
6533
6534                 if ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0) {
6535                         /*
6536                          * Can't tag queue without disconnection.
6537                          */
6538                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6539                         scsi->valid |= CTS_SCSI_VALID_TQ;
6540                 }
6541
6542                 /*
6543                  * If we are currently performing tagged transactions to
6544                  * this device and want to change its negotiation parameters,
6545                  * go non-tagged for a bit to give the controller a chance to
6546                  * negotiate unhampered by tag messages.
6547                  */
6548                 if (cts->type == CTS_TYPE_CURRENT_SETTINGS
6549                  && (device->inq_flags & SID_CmdQue) != 0
6550                  && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
6551                  && (spi->flags & (CTS_SPI_VALID_SYNC_RATE|
6552                                    CTS_SPI_VALID_SYNC_OFFSET|
6553                                    CTS_SPI_VALID_BUS_WIDTH)) != 0)
6554                         xpt_toggle_tags(cts->ccb_h.path);
6555         }
6556
6557         if (cts->type == CTS_TYPE_CURRENT_SETTINGS
6558          && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) {
6559                 int device_tagenb;
6560
6561                 /*
6562                  * If we are transitioning from tags to no-tags or
6563                  * vice-versa, we need to carefully freeze and restart
6564                  * the queue so that we don't overlap tagged and non-tagged
6565                  * commands.  We also temporarily stop tags if there is
6566                  * a change in transfer negotiation settings to allow
6567                  * "tag-less" negotiation.
6568                  */
6569                 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6570                  || (device->inq_flags & SID_CmdQue) != 0)
6571                         device_tagenb = TRUE;
6572                 else
6573                         device_tagenb = FALSE;
6574
6575                 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
6576                   && device_tagenb == FALSE)
6577                  || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0
6578                   && device_tagenb == TRUE)) {
6579
6580                         if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) {
6581                                 /*
6582                                  * Delay change to use tags until after a
6583                                  * few commands have gone to this device so
6584                                  * the controller has time to perform transfer
6585                                  * negotiations without tagged messages getting
6586                                  * in the way.
6587                                  */
6588                                 device->tag_delay_count = CAM_TAG_DELAY_COUNT;
6589                                 device->flags |= CAM_DEV_TAG_AFTER_COUNT;
6590                         } else {
6591                                 struct ccb_relsim crs;
6592
6593                                 xpt_freeze_devq(cts->ccb_h.path, /*count*/1);
6594                                 device->inq_flags &= ~SID_CmdQue;
6595                                 xpt_dev_ccbq_resize(cts->ccb_h.path,
6596                                                     sim->max_dev_openings);
6597                                 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
6598                                 device->tag_delay_count = 0;
6599
6600                                 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path,
6601                                               /*priority*/1);
6602                                 crs.ccb_h.func_code = XPT_REL_SIMQ;
6603                                 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
6604                                 crs.openings
6605                                     = crs.release_timeout
6606                                     = crs.qfrozen_cnt
6607                                     = 0;
6608                                 xpt_action((union ccb *)&crs);
6609                         }
6610                 }
6611         }
6612         if (async_update == FALSE)
6613                 (*(sim->sim_action))(sim, (union ccb *)cts);
6614 }
6615
6616 #else /* CAM_NEW_TRAN_CODE */
6617
6618 static void
6619 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device,
6620                           int async_update)
6621 {
6622         struct  cam_sim *sim;
6623         int     qfrozen;
6624
6625         sim = cts->ccb_h.path->bus->sim;
6626         if (async_update == FALSE) {
6627                 struct  scsi_inquiry_data *inq_data;
6628                 struct  ccb_pathinq cpi;
6629                 struct  ccb_trans_settings cur_cts;
6630
6631                 if (device == NULL) {
6632                         cts->ccb_h.status = CAM_PATH_INVALID;
6633                         xpt_done((union ccb *)cts);
6634                         return;
6635                 }
6636
6637                 /*
6638                  * Perform sanity checking against what the
6639                  * controller and device can do.
6640                  */
6641                 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1);
6642                 cpi.ccb_h.func_code = XPT_PATH_INQ;
6643                 xpt_action((union ccb *)&cpi);
6644                 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1);
6645                 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
6646                 cur_cts.flags = CCB_TRANS_CURRENT_SETTINGS;
6647                 xpt_action((union ccb *)&cur_cts);
6648                 inq_data = &device->inq_data;
6649
6650                 /* Fill in any gaps in what the user gave us */
6651                 if ((cts->valid & CCB_TRANS_SYNC_RATE_VALID) == 0)
6652                         cts->sync_period = cur_cts.sync_period;
6653                 if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0)
6654                         cts->sync_offset = cur_cts.sync_offset;
6655                 if ((cts->valid & CCB_TRANS_BUS_WIDTH_VALID) == 0)
6656                         cts->bus_width = cur_cts.bus_width;
6657                 if ((cts->valid & CCB_TRANS_DISC_VALID) == 0) {
6658                         cts->flags &= ~CCB_TRANS_DISC_ENB;
6659                         cts->flags |= cur_cts.flags & CCB_TRANS_DISC_ENB;
6660                 }
6661                 if ((cts->valid & CCB_TRANS_TQ_VALID) == 0) {
6662                         cts->flags &= ~CCB_TRANS_TAG_ENB;
6663                         cts->flags |= cur_cts.flags & CCB_TRANS_TAG_ENB;
6664                 }
6665
6666                 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6667                   && (inq_data->flags & SID_Sync) == 0)
6668                  || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)
6669                  || (cts->sync_offset == 0)
6670                  || (cts->sync_period == 0)) {
6671                         /* Force async */
6672                         cts->sync_period = 0;
6673                         cts->sync_offset = 0;
6674                 } else if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6675                         && (inq_data->spi3data & SID_SPI_CLOCK_DT) == 0
6676                         && cts->sync_period <= 0x9) {
6677                         /*
6678                          * Don't allow DT transmission rates if the
6679                          * device does not support it.
6680                          */
6681                         cts->sync_period = 0xa;
6682                 }
6683
6684                 switch (cts->bus_width) {
6685                 case MSG_EXT_WDTR_BUS_32_BIT:
6686                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6687                           || (inq_data->flags & SID_WBus32) != 0)
6688                          && (cpi.hba_inquiry & PI_WIDE_32) != 0)
6689                                 break;
6690                         /* FALLTHROUGH to 16-bit */
6691                 case MSG_EXT_WDTR_BUS_16_BIT:
6692                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6693                           || (inq_data->flags & SID_WBus16) != 0)
6694                          && (cpi.hba_inquiry & PI_WIDE_16) != 0) {
6695                                 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
6696                                 break;
6697                         }
6698                         /* FALLTHROUGH to 8-bit */
6699                 default: /* New bus width?? */
6700                 case MSG_EXT_WDTR_BUS_8_BIT:
6701                         /* All targets can do this */
6702                         cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
6703                         break;
6704                 }
6705
6706                 if ((cts->flags & CCB_TRANS_DISC_ENB) == 0) {
6707                         /*
6708                          * Can't tag queue without disconnection.
6709                          */
6710                         cts->flags &= ~CCB_TRANS_TAG_ENB;
6711                         cts->valid |= CCB_TRANS_TQ_VALID;
6712                 }
6713
6714                 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0
6715                  || (inq_data->flags & SID_CmdQue) == 0
6716                  || (device->queue_flags & SCP_QUEUE_DQUE) != 0
6717                  || (device->quirk->mintags == 0)) {
6718                         /*
6719                          * Can't tag on hardware that doesn't support,
6720                          * doesn't have it enabled, or has broken tag support.
6721                          */
6722                         cts->flags &= ~CCB_TRANS_TAG_ENB;
6723                 }
6724         }
6725
6726         qfrozen = FALSE;
6727         if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) {
6728                 int device_tagenb;
6729
6730                 /*
6731                  * If we are transitioning from tags to no-tags or
6732                  * vice-versa, we need to carefully freeze and restart
6733                  * the queue so that we don't overlap tagged and non-tagged
6734                  * commands.  We also temporarily stop tags if there is
6735                  * a change in transfer negotiation settings to allow
6736                  * "tag-less" negotiation.
6737                  */
6738                 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6739                  || (device->inq_flags & SID_CmdQue) != 0)
6740                         device_tagenb = TRUE;
6741                 else
6742                         device_tagenb = FALSE;
6743
6744                 if (((cts->flags & CCB_TRANS_TAG_ENB) != 0
6745                   && device_tagenb == FALSE)
6746                  || ((cts->flags & CCB_TRANS_TAG_ENB) == 0
6747                   && device_tagenb == TRUE)) {
6748
6749                         if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) {
6750                                 /*
6751                                  * Delay change to use tags until after a
6752                                  * few commands have gone to this device so
6753                                  * the controller has time to perform transfer
6754                                  * negotiations without tagged messages getting
6755                                  * in the way.
6756                                  */
6757                                 device->tag_delay_count = CAM_TAG_DELAY_COUNT;
6758                                 device->flags |= CAM_DEV_TAG_AFTER_COUNT;
6759                         } else {
6760                                 xpt_freeze_devq(cts->ccb_h.path, /*count*/1);
6761                                 qfrozen = TRUE;
6762                                 device->inq_flags &= ~SID_CmdQue;
6763                                 xpt_dev_ccbq_resize(cts->ccb_h.path,
6764                                                     sim->max_dev_openings);
6765                                 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
6766                                 device->tag_delay_count = 0;
6767                         }
6768                 }
6769         }
6770
6771         if (async_update == FALSE) {
6772                 /*
6773                  * If we are currently performing tagged transactions to
6774                  * this device and want to change its negotiation parameters,
6775                  * go non-tagged for a bit to give the controller a chance to
6776                  * negotiate unhampered by tag messages.
6777                  */
6778                 if ((device->inq_flags & SID_CmdQue) != 0
6779                  && (cts->flags & (CCB_TRANS_SYNC_RATE_VALID|
6780                                    CCB_TRANS_SYNC_OFFSET_VALID|
6781                                    CCB_TRANS_BUS_WIDTH_VALID)) != 0)
6782                         xpt_toggle_tags(cts->ccb_h.path);
6783
6784                 (*(sim->sim_action))(sim, (union ccb *)cts);
6785         }
6786
6787         if (qfrozen) {
6788                 struct ccb_relsim crs;
6789
6790                 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path,
6791                               /*priority*/1);
6792                 crs.ccb_h.func_code = XPT_REL_SIMQ;
6793                 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
6794                 crs.openings
6795                     = crs.release_timeout
6796                     = crs.qfrozen_cnt
6797                     = 0;
6798                 xpt_action((union ccb *)&crs);
6799         }
6800 }
6801
6802
6803 #endif /* CAM_NEW_TRAN_CODE */
6804
6805 static void
6806 xpt_toggle_tags(struct cam_path *path)
6807 {
6808         struct cam_ed *dev;
6809
6810         /*
6811          * Give controllers a chance to renegotiate
6812          * before starting tag operations.  We
6813          * "toggle" tagged queuing off then on
6814          * which causes the tag enable command delay
6815          * counter to come into effect.
6816          */
6817         dev = path->device;
6818         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6819          || ((dev->inq_flags & SID_CmdQue) != 0
6820           && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) {
6821                 struct ccb_trans_settings cts;
6822
6823                 xpt_setup_ccb(&cts.ccb_h, path, 1);
6824 #ifdef CAM_NEW_TRAN_CODE
6825                 cts.protocol = PROTO_SCSI;
6826                 cts.protocol_version = PROTO_VERSION_UNSPECIFIED;
6827                 cts.transport = XPORT_UNSPECIFIED;
6828                 cts.transport_version = XPORT_VERSION_UNSPECIFIED;
6829                 cts.proto_specific.scsi.flags = 0;
6830                 cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ;
6831 #else /* CAM_NEW_TRAN_CODE */
6832                 cts.flags = 0;
6833                 cts.valid = CCB_TRANS_TQ_VALID;
6834 #endif /* CAM_NEW_TRAN_CODE */
6835                 xpt_set_transfer_settings(&cts, path->device,
6836                                           /*async_update*/TRUE);
6837 #ifdef CAM_NEW_TRAN_CODE
6838                 cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB;
6839 #else /* CAM_NEW_TRAN_CODE */
6840                 cts.flags = CCB_TRANS_TAG_ENB;
6841 #endif /* CAM_NEW_TRAN_CODE */
6842                 xpt_set_transfer_settings(&cts, path->device,
6843                                           /*async_update*/TRUE);
6844         }
6845 }
6846
6847 static void
6848 xpt_start_tags(struct cam_path *path)
6849 {
6850         struct ccb_relsim crs;
6851         struct cam_ed *device;
6852         struct cam_sim *sim;
6853         int    newopenings;
6854
6855         device = path->device;
6856         sim = path->bus->sim;
6857         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
6858         xpt_freeze_devq(path, /*count*/1);
6859         device->inq_flags |= SID_CmdQue;
6860         if (device->tag_saved_openings != 0)
6861                 newopenings = device->tag_saved_openings;
6862         else
6863                 newopenings = min(device->quirk->maxtags,
6864                                   sim->max_tagged_dev_openings);
6865         xpt_dev_ccbq_resize(path, newopenings);
6866         xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1);
6867         crs.ccb_h.func_code = XPT_REL_SIMQ;
6868         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
6869         crs.openings
6870             = crs.release_timeout
6871             = crs.qfrozen_cnt
6872             = 0;
6873         xpt_action((union ccb *)&crs);
6874 }
6875
6876 static int busses_to_config;
6877 static int busses_to_reset;
6878
6879 static int
6880 xptconfigbuscountfunc(struct cam_eb *bus, void *arg)
6881 {
6882         if (bus->path_id != CAM_XPT_PATH_ID) {
6883                 struct cam_path path;
6884                 struct ccb_pathinq cpi;
6885                 int can_negotiate;
6886
6887                 busses_to_config++;
6888                 xpt_compile_path(&path, NULL, bus->path_id,
6889                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
6890                 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
6891                 cpi.ccb_h.func_code = XPT_PATH_INQ;
6892                 xpt_action((union ccb *)&cpi);
6893                 can_negotiate = cpi.hba_inquiry;
6894                 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
6895                 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0
6896                  && can_negotiate)
6897                         busses_to_reset++;
6898                 xpt_release_path(&path);
6899         }
6900
6901         return(1);
6902 }
6903
6904 static int
6905 xptconfigfunc(struct cam_eb *bus, void *arg)
6906 {
6907         struct  cam_path *path;
6908         union   ccb *work_ccb;
6909
6910         if (bus->path_id != CAM_XPT_PATH_ID) {
6911                 cam_status status;
6912                 int can_negotiate;
6913
6914                 work_ccb = xpt_alloc_ccb();
6915                 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id,
6916                                               CAM_TARGET_WILDCARD,
6917                                               CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){
6918                         printf("xptconfigfunc: xpt_create_path failed with "
6919                                "status %#x for bus %d\n", status, bus->path_id);
6920                         printf("xptconfigfunc: halting bus configuration\n");
6921                         xpt_free_ccb(work_ccb);
6922                         busses_to_config--;
6923                         xpt_finishconfig(xpt_periph, NULL);
6924                         return(0);
6925                 }
6926                 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
6927                 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
6928                 xpt_action(work_ccb);
6929                 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
6930                         printf("xptconfigfunc: CPI failed on bus %d "
6931                                "with status %d\n", bus->path_id,
6932                                work_ccb->ccb_h.status);
6933                         xpt_finishconfig(xpt_periph, work_ccb);
6934                         return(1);
6935                 }
6936
6937                 can_negotiate = work_ccb->cpi.hba_inquiry;
6938                 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
6939                 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0
6940                  && (can_negotiate != 0)) {
6941                         xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
6942                         work_ccb->ccb_h.func_code = XPT_RESET_BUS;
6943                         work_ccb->ccb_h.cbfcnp = NULL;
6944                         CAM_DEBUG(path, CAM_DEBUG_SUBTRACE,
6945                                   ("Resetting Bus\n"));
6946                         xpt_action(work_ccb);
6947                         xpt_finishconfig(xpt_periph, work_ccb);
6948                 } else {
6949                         /* Act as though we performed a successful BUS RESET */
6950                         work_ccb->ccb_h.func_code = XPT_RESET_BUS;
6951                         xpt_finishconfig(xpt_periph, work_ccb);
6952                 }
6953         }
6954
6955         return(1);
6956 }
6957
6958 static void
6959 xpt_config(void *arg)
6960 {
6961         /*
6962          * Now that interrupts are enabled, go find our devices
6963          */
6964
6965 #ifdef CAMDEBUG
6966         /* Setup debugging flags and path */
6967 #ifdef CAM_DEBUG_FLAGS
6968         cam_dflags = CAM_DEBUG_FLAGS;
6969 #else /* !CAM_DEBUG_FLAGS */
6970         cam_dflags = CAM_DEBUG_NONE;
6971 #endif /* CAM_DEBUG_FLAGS */
6972 #ifdef CAM_DEBUG_BUS
6973         if (cam_dflags != CAM_DEBUG_NONE) {
6974                 if (xpt_create_path(&cam_dpath, xpt_periph,
6975                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
6976                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
6977                         printf("xpt_config: xpt_create_path() failed for debug"
6978                                " target %d:%d:%d, debugging disabled\n",
6979                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
6980                         cam_dflags = CAM_DEBUG_NONE;
6981                 }
6982         } else
6983                 cam_dpath = NULL;
6984 #else /* !CAM_DEBUG_BUS */
6985         cam_dpath = NULL;
6986 #endif /* CAM_DEBUG_BUS */
6987 #endif /* CAMDEBUG */
6988
6989         /*
6990          * Scan all installed busses.
6991          */
6992         xpt_for_all_busses(xptconfigbuscountfunc, NULL);
6993
6994         if (busses_to_config == 0) {
6995                 /* Call manually because we don't have any busses */
6996                 xpt_finishconfig(xpt_periph, NULL);
6997         } else  {
6998                 if (busses_to_reset > 0 && scsi_delay >= 2000) {
6999                         printf("Waiting %d seconds for SCSI "
7000                                "devices to settle\n", scsi_delay/1000);
7001                 }
7002                 xpt_for_all_busses(xptconfigfunc, NULL);
7003         }
7004 }
7005
7006 /*
7007  * If the given device only has one peripheral attached to it, and if that
7008  * peripheral is the passthrough driver, announce it.  This insures that the
7009  * user sees some sort of announcement for every peripheral in their system.
7010  */
7011 static int
7012 xptpassannouncefunc(struct cam_ed *device, void *arg)
7013 {
7014         struct cam_periph *periph;
7015         int i;
7016
7017         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
7018              periph = SLIST_NEXT(periph, periph_links), i++);
7019
7020         periph = SLIST_FIRST(&device->periphs);
7021         if ((i == 1)
7022          && (strncmp(periph->periph_name, "pass", 4) == 0))
7023                 xpt_announce_periph(periph, NULL);
7024
7025         return(1);
7026 }
7027
7028 static void
7029 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb)
7030 {
7031         struct  periph_driver **p_drv;
7032         int     i;
7033
7034         if (done_ccb != NULL) {
7035                 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
7036                           ("xpt_finishconfig\n"));
7037                 switch(done_ccb->ccb_h.func_code) {
7038                 case XPT_RESET_BUS:
7039                         if (done_ccb->ccb_h.status == CAM_REQ_CMP) {
7040                                 done_ccb->ccb_h.func_code = XPT_SCAN_BUS;
7041                                 done_ccb->ccb_h.cbfcnp = xpt_finishconfig;
7042                                 done_ccb->crcn.flags = 0;
7043                                 xpt_action(done_ccb);
7044                                 return;
7045                         }
7046                         /* FALLTHROUGH */
7047                 case XPT_SCAN_BUS:
7048                 default:
7049                         xpt_free_path(done_ccb->ccb_h.path);
7050                         busses_to_config--;
7051                         break;
7052                 }
7053         }
7054
7055         if (busses_to_config == 0) {
7056                 /* Register all the peripheral drivers */
7057                 /* XXX This will have to change when we have loadable modules */
7058                 p_drv = periph_drivers;
7059                 for (i = 0; p_drv[i] != NULL; i++) {
7060                         (*p_drv[i]->init)();
7061                 }
7062
7063                 /*
7064                  * Check for devices with no "standard" peripheral driver
7065                  * attached.  For any devices like that, announce the
7066                  * passthrough driver so the user will see something.
7067                  */
7068                 xpt_for_all_devices(xptpassannouncefunc, NULL);
7069
7070                 /* Release our hook so that the boot can continue. */
7071                 config_intrhook_disestablish(xpt_config_hook);
7072                 free(xpt_config_hook, M_TEMP);
7073                 xpt_config_hook = NULL;
7074         }
7075         if (done_ccb != NULL)
7076                 xpt_free_ccb(done_ccb);
7077 }
7078
7079 static void
7080 xptaction(struct cam_sim *sim, union ccb *work_ccb)
7081 {
7082         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
7083
7084         switch (work_ccb->ccb_h.func_code) {
7085         /* Common cases first */
7086         case XPT_PATH_INQ:              /* Path routing inquiry */
7087         {
7088                 struct ccb_pathinq *cpi;
7089
7090                 cpi = &work_ccb->cpi;
7091                 cpi->version_num = 1; /* XXX??? */
7092                 cpi->hba_inquiry = 0;
7093                 cpi->target_sprt = 0;
7094                 cpi->hba_misc = 0;
7095                 cpi->hba_eng_cnt = 0;
7096                 cpi->max_target = 0;
7097                 cpi->max_lun = 0;
7098                 cpi->initiator_id = 0;
7099                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
7100                 strncpy(cpi->hba_vid, "", HBA_IDLEN);
7101                 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
7102                 cpi->unit_number = sim->unit_number;
7103                 cpi->bus_id = sim->bus_id;
7104                 cpi->base_transfer_speed = 0;
7105 #ifdef CAM_NEW_TRAN_CODE
7106                 cpi->protocol = PROTO_UNSPECIFIED;
7107                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
7108                 cpi->transport = XPORT_UNSPECIFIED;
7109                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
7110 #endif /* CAM_NEW_TRAN_CODE */
7111                 cpi->ccb_h.status = CAM_REQ_CMP;
7112                 xpt_done(work_ccb);
7113                 break;
7114         }
7115         default:
7116                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
7117                 xpt_done(work_ccb);
7118                 break;
7119         }
7120 }
7121
7122 /*
7123  * The xpt as a "controller" has no interrupt sources, so polling
7124  * is a no-op.
7125  */
7126 static void
7127 xptpoll(struct cam_sim *sim)
7128 {
7129 }
7130
7131 static void
7132 camisr(void *V_queue)
7133 {
7134         cam_isrq_t *oqueue = V_queue;
7135         cam_isrq_t queue;
7136         int     s;
7137         struct  ccb_hdr *ccb_h;
7138
7139         /*
7140          * Transfer the ccb_bioq list to a temporary list so we can operate
7141          * on it without needing to lock/unlock on every loop.  The concat
7142          * function with re-init the real list for us.
7143          */
7144         s = splcam();
7145         mtx_lock(&cam_bioq_lock);
7146         TAILQ_INIT(&queue);
7147         TAILQ_CONCAT(&queue, oqueue, sim_links.tqe);
7148         mtx_unlock(&cam_bioq_lock);
7149
7150         while ((ccb_h = TAILQ_FIRST(&queue)) != NULL) {
7151                 int     runq;
7152
7153                 TAILQ_REMOVE(&queue, ccb_h, sim_links.tqe);
7154                 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
7155                 splx(s);
7156
7157                 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE,
7158                           ("camisr\n"));
7159
7160                 runq = FALSE;
7161
7162                 if (ccb_h->flags & CAM_HIGH_POWER) {
7163                         struct highpowerlist    *hphead;
7164                         union ccb               *send_ccb;
7165
7166                         hphead = &highpowerq;
7167
7168                         send_ccb = (union ccb *)STAILQ_FIRST(hphead);
7169
7170                         /*
7171                          * Increment the count since this command is done.
7172                          */
7173                         num_highpower++;
7174
7175                         /*
7176                          * Any high powered commands queued up?
7177                          */
7178                         if (send_ccb != NULL) {
7179
7180                                 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe);
7181
7182                                 xpt_release_devq(send_ccb->ccb_h.path,
7183                                                  /*count*/1, /*runqueue*/TRUE);
7184                         }
7185                 }
7186                 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
7187                         struct cam_ed *dev;
7188
7189                         dev = ccb_h->path->device;
7190
7191                         s = splcam();
7192                         cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
7193
7194                         if (!SIM_DEAD(ccb_h->path->bus->sim)) {
7195                                 ccb_h->path->bus->sim->devq->send_active--;
7196                                 ccb_h->path->bus->sim->devq->send_openings++;
7197                         }
7198                         splx(s);
7199
7200                         if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
7201                           && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)
7202                          || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
7203                           && (dev->ccbq.dev_active == 0))) {
7204
7205                                 xpt_release_devq(ccb_h->path, /*count*/1,
7206                                                  /*run_queue*/TRUE);
7207                         }
7208
7209                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
7210                          && (--dev->tag_delay_count == 0))
7211                                 xpt_start_tags(ccb_h->path);
7212
7213                         if ((dev->ccbq.queue.entries > 0)
7214                          && (dev->qfrozen_cnt == 0)
7215                          && (device_is_send_queued(dev) == 0)) {
7216                                 runq = xpt_schedule_dev_sendq(ccb_h->path->bus,
7217                                                               dev);
7218                         }
7219                 }
7220
7221                 if (ccb_h->status & CAM_RELEASE_SIMQ) {
7222                         xpt_release_simq(ccb_h->path->bus->sim,
7223                                          /*run_queue*/TRUE);
7224                         ccb_h->status &= ~CAM_RELEASE_SIMQ;
7225                         runq = FALSE;
7226                 }
7227
7228                 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
7229                  && (ccb_h->status & CAM_DEV_QFRZN)) {
7230                         xpt_release_devq(ccb_h->path, /*count*/1,
7231                                          /*run_queue*/TRUE);
7232                         ccb_h->status &= ~CAM_DEV_QFRZN;
7233                 } else if (runq) {
7234                         xpt_run_dev_sendq(ccb_h->path->bus);
7235                 }
7236
7237                 /* Call the peripheral driver's callback */
7238                 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
7239
7240                 /* Raise IPL for while test */
7241                 s = splcam();
7242         }
7243         splx(s);
7244 }
7245
7246 static void
7247 dead_sim_action(struct cam_sim *sim, union ccb *ccb)
7248 {
7249
7250         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
7251         xpt_done(ccb);
7252 }
7253
7254 static void
7255 dead_sim_poll(struct cam_sim *sim)
7256 {
7257 }