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