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
  49 #ifdef PC98
  50 #include <pc98/pc98/pc98_machdep.h>     /* geometry translation */
  51 #endif
  52
  53 #include <cam/cam.h>
  54 #include <cam/cam_ccb.h>
  55 #include <cam/cam_periph.h>
  56 #include <cam/cam_sim.h>
  57 #include <cam/cam_xpt.h>
  58 #include <cam/cam_xpt_sim.h>
  59 #include <cam/cam_xpt_periph.h>
  60 #include <cam/cam_debug.h>
  61
  62 #include <cam/scsi/scsi_all.h>
  63 #include <cam/scsi/scsi_message.h>
  64 #include <cam/scsi/scsi_pass.h>
  65 #include "opt_cam.h"
  66
  67 /* Datastructures internal to the xpt layer */
  68 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
  69
  70 /*
  71  * Definition of an async handler callback block.  These are used to add
  72  * SIMs and peripherals to the async callback lists.
  73  */
  74 struct async_node {
  75         SLIST_ENTRY(async_node) links;
  76         u_int32_t       event_enable;   /* Async Event enables */
  77         void            (*callback)(void *arg, u_int32_t code,
  78                                     struct cam_path *path, void *args);
  79         void            *callback_arg;
  80 };
  81
  82 SLIST_HEAD(async_list, async_node);
  83 SLIST_HEAD(periph_list, cam_periph);
  84 static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq;
  85
  86 /*
  87  * This is the maximum number of high powered commands (e.g. start unit)
  88  * that can be outstanding at a particular time.
  89  */
  90 #ifndef CAM_MAX_HIGHPOWER
  91 #define CAM_MAX_HIGHPOWER  4
  92 #endif
  93
  94 /* number of high powered commands that can go through right now */
  95 static int num_highpower = CAM_MAX_HIGHPOWER;
  96
  97 /*
  98  * Structure for queueing a device in a run queue.
  99  * There is one run queue for allocating new ccbs,
 100  * and another for sending ccbs to the controller.
 101  */
 102 struct cam_ed_qinfo {
 103         cam_pinfo pinfo;
 104         struct    cam_ed *device;
 105 };
 106
 107 /*
 108  * The CAM EDT (Existing Device Table) contains the device information for
 109  * all devices for all busses in the system.  The table contains a
 110  * cam_ed structure for each device on the bus.
 111  */
 112 struct cam_ed {
 113         TAILQ_ENTRY(cam_ed) links;
 114         struct  cam_ed_qinfo alloc_ccb_entry;
 115         struct  cam_ed_qinfo send_ccb_entry;
 116         struct  cam_et   *target;
 117         lun_id_t         lun_id;
 118         struct  camq drvq;              /*
 119                                          * Queue of type drivers wanting to do
 120                                          * work on this device.
 121                                          */
 122         struct  cam_ccbq ccbq;          /* Queue of pending ccbs */
 123         struct  async_list asyncs;      /* Async callback info for this B/T/L */
 124         struct  periph_list periphs;    /* All attached devices */
 125         u_int   generation;             /* Generation number */
 126         struct  cam_periph *owner;      /* Peripheral driver's ownership tag */
 127         struct  xpt_quirk_entry *quirk; /* Oddities about this device */
 128                                         /* Storage for the inquiry data */
 129 #ifdef CAM_NEW_TRAN_CODE
 130         cam_proto        protocol;
 131         u_int            protocol_version;
 132         cam_xport        transport;
 133         u_int            transport_version;
 134 #endif /* CAM_NEW_TRAN_CODE */
 135         struct           scsi_inquiry_data inq_data;
 136         u_int8_t         inq_flags;     /*
 137                                          * Current settings for inquiry flags.
 138                                          * This allows us to override settings
 139                                          * like disconnection and tagged
 140                                          * queuing for a device.
 141                                          */
 142         u_int8_t         queue_flags;   /* Queue flags from the control page */
 143         u_int8_t         serial_num_len;
 144         u_int8_t        *serial_num;
 145         u_int32_t        qfrozen_cnt;
 146         u_int32_t        flags;
 147 #define CAM_DEV_UNCONFIGURED            0x01
 148 #define CAM_DEV_REL_TIMEOUT_PENDING     0x02
 149 #define CAM_DEV_REL_ON_COMPLETE         0x04
 150 #define CAM_DEV_REL_ON_QUEUE_EMPTY      0x08
 151 #define CAM_DEV_RESIZE_QUEUE_NEEDED     0x10
 152 #define CAM_DEV_TAG_AFTER_COUNT         0x20
 153 #define CAM_DEV_INQUIRY_DATA_VALID      0x40
 154         u_int32_t        tag_delay_count;
 155 #define CAM_TAG_DELAY_COUNT             5
 156         u_int32_t        tag_saved_openings;
 157         u_int32_t        refcount;
 158         struct           callout_handle c_handle;
 159 };
 160
 161 /*
 162  * Each target is represented by an ET (Existing Target).  These
 163  * entries are created when a target is successfully probed with an
 164  * identify, and removed when a device fails to respond after a number
 165  * of retries, or a bus rescan finds the device missing.
 166  */
 167 struct cam_et {
 168         TAILQ_HEAD(, cam_ed) ed_entries;
 169         TAILQ_ENTRY(cam_et) links;
 170         struct  cam_eb  *bus;
 171         target_id_t     target_id;
 172         u_int32_t       refcount;
 173         u_int           generation;
 174         struct          timeval last_reset;
 175 };
 176
 177 /*
 178  * Each bus is represented by an EB (Existing Bus).  These entries
 179  * are created by calls to xpt_bus_register and deleted by calls to
 180  * xpt_bus_deregister.
 181  */
 182 struct cam_eb {
 183         TAILQ_HEAD(, cam_et) et_entries;
 184         TAILQ_ENTRY(cam_eb)  links;
 185         path_id_t            path_id;
 186         struct cam_sim       *sim;
 187         struct timeval       last_reset;
 188         u_int32_t            flags;
 189 #define CAM_EB_RUNQ_SCHEDULED   0x01
 190         u_int32_t            refcount;
 191         u_int                generation;
 192 };
 193
 194 struct cam_path {
 195         struct cam_periph *periph;
 196         struct cam_eb     *bus;
 197         struct cam_et     *target;
 198         struct cam_ed     *device;
 199 };
 200
 201 struct xpt_quirk_entry {
 202         struct scsi_inquiry_pattern inq_pat;
 203         u_int8_t quirks;
 204 #define CAM_QUIRK_NOLUNS        0x01
 205 #define CAM_QUIRK_NOSERIAL      0x02
 206 #define CAM_QUIRK_HILUNS        0x04
 207 #define CAM_QUIRK_NOHILUNS      0x08
 208         u_int mintags;
 209         u_int maxtags;
 210 };
 211 #define CAM_SCSI2_MAXLUN        8
 212 /*
 213  * If we're not quirked to search <= the first 8 luns
 214  * and we are either quirked to search above lun 8,
 215  * or we're > SCSI-2, we can look for luns above lun 8.
 216  */
 217 #define CAN_SRCH_HI(dv)                                 \
 218   (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0)      \
 219   && ((dv->quirk->quirks & CAM_QUIRK_HILUNS)            \
 220   || SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2))
 221
 222 typedef enum {
 223         XPT_FLAG_OPEN           = 0x01
 224 } xpt_flags;
 225
 226 struct xpt_softc {
 227         xpt_flags       flags;
 228         u_int32_t       generation;
 229 };
 230
 231 static const char quantum[] = "QUANTUM";
 232 static const char sony[] = "SONY";
 233 static const char west_digital[] = "WDIGTL";
 234 static const char samsung[] = "SAMSUNG";
 235 static const char seagate[] = "SEAGATE";
 236 static const char microp[] = "MICROP";
 237
 238 static struct xpt_quirk_entry xpt_quirk_table[] =
 239 {
 240         {
 241                 /* Reports QUEUE FULL for temporary resource shortages */
 242                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" },
 243                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 244         },
 245         {
 246                 /* Reports QUEUE FULL for temporary resource shortages */
 247                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" },
 248                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 249         },
 250         {
 251                 /* Reports QUEUE FULL for temporary resource shortages */
 252                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" },
 253                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 254         },
 255         {
 256                 /* Broken tagged queuing drive */
 257                 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" },
 258                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 259         },
 260         {
 261                 /* Broken tagged queuing drive */
 262                 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" },
 263                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 264         },
 265         {
 266                 /* Broken tagged queuing drive */
 267                 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" },
 268                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 269         },
 270         {
 271                 /*
 272                  * Unfortunately, the Quantum Atlas III has the same
 273                  * problem as the Atlas II drives above.
 274                  * Reported by: "Johan Granlund" <johan@granlund.nu>
 275                  *
 276                  * For future reference, the drive with the problem was:
 277                  * QUANTUM QM39100TD-SW N1B0
 278                  *
 279                  * It's possible that Quantum will fix the problem in later
 280                  * firmware revisions.  If that happens, the quirk entry
 281                  * will need to be made specific to the firmware revisions
 282                  * with the problem.
 283                  *
 284                  */
 285                 /* Reports QUEUE FULL for temporary resource shortages */
 286                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" },
 287                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 288         },
 289         {
 290                 /*
 291                  * 18 Gig Atlas III, same problem as the 9G version.
 292                  * Reported by: Andre Albsmeier
 293                  *              <andre.albsmeier@mchp.siemens.de>
 294                  *
 295                  * For future reference, the drive with the problem was:
 296                  * QUANTUM QM318000TD-S N491
 297                  */
 298                 /* Reports QUEUE FULL for temporary resource shortages */
 299                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" },
 300                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 301         },
 302         {
 303                 /*
 304                  * Broken tagged queuing drive
 305                  * Reported by: Bret Ford <bford@uop.cs.uop.edu>
 306                  *         and: Martin Renters <martin@tdc.on.ca>
 307                  */
 308                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" },
 309                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 310         },
 311                 /*
 312                  * The Seagate Medalist Pro drives have very poor write
 313                  * performance with anything more than 2 tags.
 314                  *
 315                  * Reported by:  Paul van der Zwan <paulz@trantor.xs4all.nl>
 316                  * Drive:  <SEAGATE ST36530N 1444>
 317                  *
 318                  * Reported by:  Jeremy Lea <reg@shale.csir.co.za>
 319                  * Drive:  <SEAGATE ST34520W 1281>
 320                  *
 321                  * No one has actually reported that the 9G version
 322                  * (ST39140*) of the Medalist Pro has the same problem, but
 323                  * we're assuming that it does because the 4G and 6.5G
 324                  * versions of the drive are broken.
 325                  */
 326         {
 327                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"},
 328                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 329         },
 330         {
 331                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"},
 332                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 333         },
 334         {
 335                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"},
 336                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 337         },
 338         {
 339                 /*
 340                  * Slow when tagged queueing is enabled.  Write performance
 341                  * steadily drops off with more and more concurrent
 342                  * transactions.  Best sequential write performance with
 343                  * tagged queueing turned off and write caching turned on.
 344                  *
 345                  * PR:  kern/10398
 346                  * Submitted by:  Hideaki Okada <hokada@isl.melco.co.jp>
 347                  * Drive:  DCAS-34330 w/ "S65A" firmware.
 348                  *
 349                  * The drive with the problem had the "S65A" firmware
 350                  * revision, and has also been reported (by Stephen J.
 351                  * Roznowski <sjr@home.net>) for a drive with the "S61A"
 352                  * firmware revision.
 353                  *
 354                  * Although no one has reported problems with the 2 gig
 355                  * version of the DCAS drive, the assumption is that it
 356                  * has the same problems as the 4 gig version.  Therefore
 357                  * this quirk entries disables tagged queueing for all
 358                  * DCAS drives.
 359                  */
 360                 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" },
 361                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 362         },
 363         {
 364                 /* Broken tagged queuing drive */
 365                 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" },
 366                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 367         },
 368         {
 369                 /* Broken tagged queuing drive */
 370                 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" },
 371                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 372         },
 373         {
 374                 /*
 375                  * Broken tagged queuing drive.
 376                  * Submitted by:
 377                  * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp>
 378                  * in PR kern/9535
 379                  */
 380                 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" },
 381                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 382         },
 383         {
 384                 /*
 385                  * Slow when tagged queueing is enabled. (1.5MB/sec versus
 386                  * 8MB/sec.)
 387                  * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
 388                  * Best performance with these drives is achieved with
 389                  * tagged queueing turned off, and write caching turned on.
 390                  */
 391                 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" },
 392                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 393         },
 394         {
 395                 /*
 396                  * Slow when tagged queueing is enabled. (1.5MB/sec versus
 397                  * 8MB/sec.)
 398                  * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
 399                  * Best performance with these drives is achieved with
 400                  * tagged queueing turned off, and write caching turned on.
 401                  */
 402                 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" },
 403                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 404         },
 405         {
 406                 /*
 407                  * Doesn't handle queue full condition correctly,
 408                  * so we need to limit maxtags to what the device
 409                  * can handle instead of determining this automatically.
 410                  */
 411                 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" },
 412                 /*quirks*/0, /*mintags*/2, /*maxtags*/32
 413         },
 414         {
 415                 /* Really only one LUN */
 416                 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" },
 417                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 418         },
 419         {
 420                 /* I can't believe we need a quirk for DPT volumes. */
 421                 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" },
 422                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS,
 423                 /*mintags*/0, /*maxtags*/255
 424         },
 425         {
 426                 /*
 427                  * Many Sony CDROM drives don't like multi-LUN probing.
 428                  */
 429                 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" },
 430                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 431         },
 432         {
 433                 /*
 434                  * This drive doesn't like multiple LUN probing.
 435                  * Submitted by:  Parag Patel <parag@cgt.com>
 436                  */
 437                 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R   CDU9*", "*" },
 438                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 439         },
 440         {
 441                 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" },
 442                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 443         },
 444         {
 445                 /*
 446                  * The 8200 doesn't like multi-lun probing, and probably
 447                  * don't like serial number requests either.
 448                  */
 449                 {
 450                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
 451                         "EXB-8200*", "*"
 452                 },
 453                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 454         },
 455         {
 456                 /*
 457                  * Let's try the same as above, but for a drive that says
 458                  * it's an IPL-6860 but is actually an EXB 8200.
 459                  */
 460                 {
 461                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
 462                         "IPL-6860*", "*"
 463                 },
 464                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 465         },
 466         {
 467                 /*
 468                  * These Hitachi drives don't like multi-lun probing.
 469                  * The PR submitter has a DK319H, but says that the Linux
 470                  * kernel has a similar work-around for the DK312 and DK314,
 471                  * so all DK31* drives are quirked here.
 472                  * PR:            misc/18793
 473                  * Submitted by:  Paul Haddad <paul@pth.com>
 474                  */
 475                 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" },
 476                 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
 477         },
 478         {
 479                 /*
 480                  * The Hitachi CJ series with J8A8 firmware apparantly has
 481                  * problems with tagged commands.
 482                  * PR: 23536
 483                  * Reported by: amagai@nue.org
 484                  */
 485                 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK32CJ*", "J8A8" },
 486                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 487         },
 488         {
 489                 /*
 490                  * These are the large storage arrays.
 491                  * Submitted by:  William Carrel <william.carrel@infospace.com>
 492                  */
 493                 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "OPEN*", "*" },
 494                 CAM_QUIRK_HILUNS, 2, 1024
 495         },
 496         {
 497                 /*
 498                  * This old revision of the TDC3600 is also SCSI-1, and
 499                  * hangs upon serial number probing.
 500                  */
 501                 {
 502                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 503                         " TDC 3600", "U07:"
 504                 },
 505                 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0
 506         },
 507         {
 508                 /*
 509                  * Maxtor Personal Storage 3000XT (Firewire)
 510                  * hangs upon serial number probing.
 511                  */
 512                 {
 513                         T_DIRECT, SIP_MEDIA_FIXED, "Maxtor",
 514                         "1394 storage", "*"
 515                 },
 516                 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0
 517         },
 518         {
 519                 /*
 520                  * Would repond to all LUNs if asked for.
 521                  */
 522                 {
 523                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER",
 524                         "CP150", "*"
 525                 },
 526                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 527         },
 528         {
 529                 /*
 530                  * Would repond to all LUNs if asked for.
 531                  */
 532                 {
 533                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
 534                         "96X2*", "*"
 535                 },
 536                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 537         },
 538         {
 539                 /* Submitted by: Matthew Dodd <winter@jurai.net> */
 540                 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" },
 541                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 542         },
 543         {
 544                 /* Submitted by: Matthew Dodd <winter@jurai.net> */
 545                 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" },
 546                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 547         },
 548         {
 549                 /* TeraSolutions special settings for TRC-22 RAID */
 550                 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" },
 551                   /*quirks*/0, /*mintags*/55, /*maxtags*/255
 552         },
 553         {
 554                 /* Veritas Storage Appliance */
 555                 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" },
 556                   CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024
 557         },
 558         {
 559                 /*
 560                  * Would respond to all LUNs.  Device type and removable
 561                  * flag are jumper-selectable.
 562                  */
 563                 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix",
 564                   "Tahiti 1", "*"
 565                 },
 566                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 567         },
 568         {
 569                 /* EasyRAID E5A aka. areca ARC-6010 */
 570                 { T_DIRECT, SIP_MEDIA_FIXED, "easyRAID", "*", "*" },
 571                   CAM_QUIRK_NOHILUNS, /*mintags*/2, /*maxtags*/255
 572         },
 573         {
 574                 /* Default tagged queuing parameters for all devices */
 575                 {
 576                   T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED,
 577                   /*vendor*/"*", /*product*/"*", /*revision*/"*"
 578                 },
 579                 /*quirks*/0, /*mintags*/2, /*maxtags*/255
 580         },
 581 };
 582
 583 static const int xpt_quirk_table_size =
 584         sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table);
 585
 586 typedef enum {
 587         DM_RET_COPY             = 0x01,
 588         DM_RET_FLAG_MASK        = 0x0f,
 589         DM_RET_NONE             = 0x00,
 590         DM_RET_STOP             = 0x10,
 591         DM_RET_DESCEND          = 0x20,
 592         DM_RET_ERROR            = 0x30,
 593         DM_RET_ACTION_MASK      = 0xf0
 594 } dev_match_ret;
 595
 596 typedef enum {
 597         XPT_DEPTH_BUS,
 598         XPT_DEPTH_TARGET,
 599         XPT_DEPTH_DEVICE,
 600         XPT_DEPTH_PERIPH
 601 } xpt_traverse_depth;
 602
 603 struct xpt_traverse_config {
 604         xpt_traverse_depth      depth;
 605         void                    *tr_func;
 606         void                    *tr_arg;
 607 };
 608
 609 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 610 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 611 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 612 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 613 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 614
 615 /* Transport layer configuration information */
 616 static struct xpt_softc xsoftc;
 617
 618 /* Queues for our software interrupt handler */
 619 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t;
 620 static cam_isrq_t cam_bioq;
 621 static struct mtx cam_bioq_lock;
 622
 623 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */
 624 static SLIST_HEAD(,ccb_hdr) ccb_freeq;
 625 static u_int xpt_max_ccbs;      /*
 626                                  * Maximum size of ccb pool.  Modified as
 627                                  * devices are added/removed or have their
 628                                  * opening counts changed.
 629                                  */
 630 static u_int xpt_ccb_count;     /* Current count of allocated ccbs */
 631
 632 struct cam_periph *xpt_periph;
 633
 634 static periph_init_t xpt_periph_init;
 635
 636 static periph_init_t probe_periph_init;
 637
 638 static struct periph_driver xpt_driver =
 639 {
 640         xpt_periph_init, "xpt",
 641         TAILQ_HEAD_INITIALIZER(xpt_driver.units)
 642 };
 643
 644 static struct periph_driver probe_driver =
 645 {
 646         probe_periph_init, "probe",
 647         TAILQ_HEAD_INITIALIZER(probe_driver.units)
 648 };
 649
 650 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 651 PERIPHDRIVER_DECLARE(probe, probe_driver);
 652
 653
 654 static d_open_t xptopen;
 655 static d_close_t xptclose;
 656 static d_ioctl_t xptioctl;
 657
 658 static struct cdevsw xpt_cdevsw = {
 659         .d_version =    D_VERSION,
 660         .d_flags =      D_NEEDGIANT,
 661         .d_open =       xptopen,
 662         .d_close =      xptclose,
 663         .d_ioctl =      xptioctl,
 664         .d_name =       "xpt",
 665 };
 666
 667 static struct intr_config_hook *xpt_config_hook;
 668
 669 /* Registered busses */
 670 static TAILQ_HEAD(,cam_eb) xpt_busses;
 671 static u_int bus_generation;
 672
 673 /* Storage for debugging datastructures */
 674 #ifdef  CAMDEBUG
 675 struct cam_path *cam_dpath;
 676 u_int32_t cam_dflags;
 677 u_int32_t cam_debug_delay;
 678 #endif
 679
 680 /* Pointers to software interrupt handlers */
 681 static void *cambio_ih;
 682
 683 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG)
 684 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS"
 685 #endif
 686
 687 /*
 688  * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG
 689  * enabled.  Also, the user must have either none, or all of CAM_DEBUG_BUS,
 690  * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified.
 691  */
 692 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \
 693     || defined(CAM_DEBUG_LUN)
 694 #ifdef CAMDEBUG
 695 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \
 696     || !defined(CAM_DEBUG_LUN)
 697 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \
 698         and CAM_DEBUG_LUN"
 699 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */
 700 #else /* !CAMDEBUG */
 701 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options"
 702 #endif /* CAMDEBUG */
 703 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */
 704
 705 /* Our boot-time initialization hook */
 706 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 707
 708 static moduledata_t cam_moduledata = {
 709         "cam",
 710         cam_module_event_handler,
 711         NULL
 712 };
 713
 714 static void     xpt_init(void *);
 715
 716 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 717 MODULE_VERSION(cam, 1);
 718
 719
 720 static cam_status       xpt_compile_path(struct cam_path *new_path,
 721                                          struct cam_periph *perph,
 722                                          path_id_t path_id,
 723                                          target_id_t target_id,
 724                                          lun_id_t lun_id);
 725
 726 static void             xpt_release_path(struct cam_path *path);
 727
 728 static void             xpt_async_bcast(struct async_list *async_head,
 729                                         u_int32_t async_code,
 730                                         struct cam_path *path,
 731                                         void *async_arg);
 732 static void             xpt_dev_async(u_int32_t async_code,
 733                                       struct cam_eb *bus,
 734                                       struct cam_et *target,
 735                                       struct cam_ed *device,
 736                                       void *async_arg);
 737 static path_id_t xptnextfreepathid(void);
 738 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 739 static union ccb *xpt_get_ccb(struct cam_ed *device);
 740 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 741                                   u_int32_t new_priority);
 742 static void      xpt_run_dev_allocq(struct cam_eb *bus);
 743 static void      xpt_run_dev_sendq(struct cam_eb *bus);
 744 static timeout_t xpt_release_devq_timeout;
 745 static timeout_t xpt_release_simq_timeout;
 746 static void      xpt_release_bus(struct cam_eb *bus);
 747 static void      xpt_release_devq_device(struct cam_ed *dev, u_int count,
 748                                          int run_queue);
 749 static struct cam_et*
 750                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 751 static void      xpt_release_target(struct cam_eb *bus, struct cam_et *target);
 752 static struct cam_ed*
 753                  xpt_alloc_device(struct cam_eb *bus, struct cam_et *target,
 754                                   lun_id_t lun_id);
 755 static void      xpt_release_device(struct cam_eb *bus, struct cam_et *target,
 756                                     struct cam_ed *device);
 757 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings);
 758 static struct cam_eb*
 759                  xpt_find_bus(path_id_t path_id);
 760 static struct cam_et*
 761                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 762 static struct cam_ed*
 763                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 764 static void      xpt_scan_bus(struct cam_periph *periph, union ccb *ccb);
 765 static void      xpt_scan_lun(struct cam_periph *periph,
 766                               struct cam_path *path, cam_flags flags,
 767                               union ccb *ccb);
 768 static void      xptscandone(struct cam_periph *periph, union ccb *done_ccb);
 769 static xpt_busfunc_t    xptconfigbuscountfunc;
 770 static xpt_busfunc_t    xptconfigfunc;
 771 static void      xpt_config(void *arg);
 772 static xpt_devicefunc_t xptpassannouncefunc;
 773 static void      xpt_finishconfig(struct cam_periph *periph, union ccb *ccb);
 774 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 775 static void      xptpoll(struct cam_sim *sim);
 776 static void      camisr(void *);
 777 #if 0
 778 static void      xptstart(struct cam_periph *periph, union ccb *work_ccb);
 779 static void      xptasync(struct cam_periph *periph,
 780                           u_int32_t code, cam_path *path);
 781 #endif
 782 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 783                                     u_int num_patterns, struct cam_eb *bus);
 784 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 785                                        u_int num_patterns,
 786                                        struct cam_ed *device);
 787 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 788                                        u_int num_patterns,
 789                                        struct cam_periph *periph);
 790 static xpt_busfunc_t    xptedtbusfunc;
 791 static xpt_targetfunc_t xptedttargetfunc;
 792 static xpt_devicefunc_t xptedtdevicefunc;
 793 static xpt_periphfunc_t xptedtperiphfunc;
 794 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 795 static xpt_periphfunc_t xptplistperiphfunc;
 796 static int              xptedtmatch(struct ccb_dev_match *cdm);
 797 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 798 static int              xptbustraverse(struct cam_eb *start_bus,
 799                                        xpt_busfunc_t *tr_func, void *arg);
 800 static int              xpttargettraverse(struct cam_eb *bus,
 801                                           struct cam_et *start_target,
 802                                           xpt_targetfunc_t *tr_func, void *arg);
 803 static int              xptdevicetraverse(struct cam_et *target,
 804                                           struct cam_ed *start_device,
 805                                           xpt_devicefunc_t *tr_func, void *arg);
 806 static int              xptperiphtraverse(struct cam_ed *device,
 807                                           struct cam_periph *start_periph,
 808                                           xpt_periphfunc_t *tr_func, void *arg);
 809 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 810                                         xpt_pdrvfunc_t *tr_func, void *arg);
 811 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 812                                             struct cam_periph *start_periph,
 813                                             xpt_periphfunc_t *tr_func,
 814                                             void *arg);
 815 static xpt_busfunc_t    xptdefbusfunc;
 816 static xpt_targetfunc_t xptdeftargetfunc;
 817 static xpt_devicefunc_t xptdefdevicefunc;
 818 static xpt_periphfunc_t xptdefperiphfunc;
 819 static int              xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg);
 820 #ifdef notusedyet
 821 static int              xpt_for_all_targets(xpt_targetfunc_t *tr_func,
 822                                             void *arg);
 823 #endif
 824 static int              xpt_for_all_devices(xpt_devicefunc_t *tr_func,
 825                                             void *arg);
 826 #ifdef notusedyet
 827 static int              xpt_for_all_periphs(xpt_periphfunc_t *tr_func,
 828                                             void *arg);
 829 #endif
 830 static xpt_devicefunc_t xptsetasyncfunc;
 831 static xpt_busfunc_t    xptsetasyncbusfunc;
 832 static cam_status       xptregister(struct cam_periph *periph,
 833                                     void *arg);
 834 static cam_status       proberegister(struct cam_periph *periph,
 835                                       void *arg);
 836 static void      probeschedule(struct cam_periph *probe_periph);
 837 static void      probestart(struct cam_periph *periph, union ccb *start_ccb);
 838 static void      proberequestdefaultnegotiation(struct cam_periph *periph);
 839 static void      probedone(struct cam_periph *periph, union ccb *done_ccb);
 840 static void      probecleanup(struct cam_periph *periph);
 841 static void      xpt_find_quirk(struct cam_ed *device);
 842 #ifdef CAM_NEW_TRAN_CODE
 843 static void      xpt_devise_transport(struct cam_path *path);
 844 #endif /* CAM_NEW_TRAN_CODE */
 845 static void      xpt_set_transfer_settings(struct ccb_trans_settings *cts,
 846                                            struct cam_ed *device,
 847                                            int async_update);
 848 static void      xpt_toggle_tags(struct cam_path *path);
 849 static void      xpt_start_tags(struct cam_path *path);
 850 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus,
 851                                             struct cam_ed *dev);
 852 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus,
 853                                            struct cam_ed *dev);
 854 static __inline int periph_is_queued(struct cam_periph *periph);
 855 static __inline int device_is_alloc_queued(struct cam_ed *device);
 856 static __inline int device_is_send_queued(struct cam_ed *device);
 857 static __inline int dev_allocq_is_runnable(struct cam_devq *devq);
 858
 859 static __inline int
 860 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev)
 861 {
 862         int retval;
 863
 864         if (dev->ccbq.devq_openings > 0) {
 865                 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) {
 866                         cam_ccbq_resize(&dev->ccbq,
 867                                         dev->ccbq.dev_openings
 868                                         + dev->ccbq.dev_active);
 869                         dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED;
 870                 }
 871                 /*
 872                  * The priority of a device waiting for CCB resources
 873                  * is that of the the highest priority peripheral driver
 874                  * enqueued.
 875                  */
 876                 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue,
 877                                           &dev->alloc_ccb_entry.pinfo,
 878                                           CAMQ_GET_HEAD(&dev->drvq)->priority);
 879         } else {
 880                 retval = 0;
 881         }
 882
 883         return (retval);
 884 }
 885
 886 static __inline int
 887 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev)
 888 {
 889         int     retval;
 890
 891         if (dev->ccbq.dev_openings > 0) {
 892                 /*
 893                  * The priority of a device waiting for controller
 894                  * resources is that of the the highest priority CCB
 895                  * enqueued.
 896                  */
 897                 retval =
 898                     xpt_schedule_dev(&bus->sim->devq->send_queue,
 899                                      &dev->send_ccb_entry.pinfo,
 900                                      CAMQ_GET_HEAD(&dev->ccbq.queue)->priority);
 901         } else {
 902                 retval = 0;
 903         }
 904         return (retval);
 905 }
 906
 907 static __inline int
 908 periph_is_queued(struct cam_periph *periph)
 909 {
 910         return (periph->pinfo.index != CAM_UNQUEUED_INDEX);
 911 }
 912
 913 static __inline int
 914 device_is_alloc_queued(struct cam_ed *device)
 915 {
 916         return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
 917 }
 918
 919 static __inline int
 920 device_is_send_queued(struct cam_ed *device)
 921 {
 922         return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
 923 }
 924
 925 static __inline int
 926 dev_allocq_is_runnable(struct cam_devq *devq)
 927 {
 928         /*
 929          * Have work to do.
 930          * Have space to do more work.
 931          * Allowed to do work.
 932          */
 933         return ((devq->alloc_queue.qfrozen_cnt == 0)
 934              && (devq->alloc_queue.entries > 0)
 935              && (devq->alloc_openings > 0));
 936 }
 937
 938 static void
 939 xpt_periph_init()
 940 {
 941         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 942 }
 943
 944 static void
 945 probe_periph_init()
 946 {
 947 }
 948
 949
 950 static void
 951 xptdone(struct cam_periph *periph, union ccb *done_ccb)
 952 {
 953         /* Caller will release the CCB */
 954         wakeup(&done_ccb->ccb_h.cbfcnp);
 955 }
 956
 957 static int
 958 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 959 {
 960         int unit;
 961
 962         unit = minor(dev) & 0xff;
 963
 964         /*
 965          * Only allow read-write access.
 966          */
 967         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 968                 return(EPERM);
 969
 970         /*
 971          * We don't allow nonblocking access.
 972          */
 973         if ((flags & O_NONBLOCK) != 0) {
 974                 printf("xpt%d: can't do nonblocking access\n", unit);
 975                 return(ENODEV);
 976         }
 977
 978         /*
 979          * We only have one transport layer right now.  If someone accesses
 980          * us via something other than minor number 1, point out their
 981          * mistake.
 982          */
 983         if (unit != 0) {
 984                 printf("xptopen: got invalid xpt unit %d\n", unit);
 985                 return(ENXIO);
 986         }
 987
 988         /* Mark ourselves open */
 989         xsoftc.flags |= XPT_FLAG_OPEN;
 990
 991         return(0);
 992 }
 993
 994 static int
 995 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 996 {
 997         int unit;
 998
 999         unit = minor(dev) & 0xff;
1000
1001         /*
1002          * We only have one transport layer right now.  If someone accesses
1003          * us via something other than minor number 1, point out their
1004          * mistake.
1005          */
1006         if (unit != 0) {
1007                 printf("xptclose: got invalid xpt unit %d\n", unit);
1008                 return(ENXIO);
1009         }
1010
1011         /* Mark ourselves closed */
1012         xsoftc.flags &= ~XPT_FLAG_OPEN;
1013
1014         return(0);
1015 }
1016
1017 static int
1018 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1019 {
1020         int unit, error;
1021
1022         error = 0;
1023         unit = minor(dev) & 0xff;
1024
1025         /*
1026          * We only have one transport layer right now.  If someone accesses
1027          * us via something other than minor number 1, point out their
1028          * mistake.
1029          */
1030         if (unit != 0) {
1031                 printf("xptioctl: got invalid xpt unit %d\n", unit);
1032                 return(ENXIO);
1033         }
1034
1035         switch(cmd) {
1036         /*
1037          * For the transport layer CAMIOCOMMAND ioctl, we really only want
1038          * to accept CCB types that don't quite make sense to send through a
1039          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
1040          * in the CAM spec.
1041          */
1042         case CAMIOCOMMAND: {
1043                 union ccb *ccb;
1044                 union ccb *inccb;
1045
1046                 inccb = (union ccb *)addr;
1047
1048                 switch(inccb->ccb_h.func_code) {
1049                 case XPT_SCAN_BUS:
1050                 case XPT_RESET_BUS:
1051                         if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD)
1052                          || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) {
1053                                 error = EINVAL;
1054                                 break;
1055                         }
1056                         /* FALLTHROUGH */
1057                 case XPT_PATH_INQ:
1058                 case XPT_ENG_INQ:
1059                 case XPT_SCAN_LUN:
1060
1061                         ccb = xpt_alloc_ccb();
1062
1063                         /*
1064                          * Create a path using the bus, target, and lun the
1065                          * user passed in.
1066                          */
1067                         if (xpt_create_path(&ccb->ccb_h.path, xpt_periph,
1068                                             inccb->ccb_h.path_id,
1069                                             inccb->ccb_h.target_id,
1070                                             inccb->ccb_h.target_lun) !=
1071                                             CAM_REQ_CMP){
1072                                 error = EINVAL;
1073                                 xpt_free_ccb(ccb);
1074                                 break;
1075                         }
1076                         /* Ensure all of our fields are correct */
1077                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
1078                                       inccb->ccb_h.pinfo.priority);
1079                         xpt_merge_ccb(ccb, inccb);
1080                         ccb->ccb_h.cbfcnp = xptdone;
1081                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
1082                         bcopy(ccb, inccb, sizeof(union ccb));
1083                         xpt_free_path(ccb->ccb_h.path);
1084                         xpt_free_ccb(ccb);
1085                         break;
1086
1087                 case XPT_DEBUG: {
1088                         union ccb ccb;
1089
1090                         /*
1091                          * This is an immediate CCB, so it's okay to
1092                          * allocate it on the stack.
1093                          */
1094
1095                         /*
1096                          * Create a path using the bus, target, and lun the
1097                          * user passed in.
1098                          */
1099                         if (xpt_create_path(&ccb.ccb_h.path, xpt_periph,
1100                                             inccb->ccb_h.path_id,
1101                                             inccb->ccb_h.target_id,
1102                                             inccb->ccb_h.target_lun) !=
1103                                             CAM_REQ_CMP){
1104                                 error = EINVAL;
1105                                 break;
1106                         }
1107                         /* Ensure all of our fields are correct */
1108                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
1109                                       inccb->ccb_h.pinfo.priority);
1110                         xpt_merge_ccb(&ccb, inccb);
1111                         ccb.ccb_h.cbfcnp = xptdone;
1112                         xpt_action(&ccb);
1113                         bcopy(&ccb, inccb, sizeof(union ccb));
1114                         xpt_free_path(ccb.ccb_h.path);
1115                         break;
1116
1117                 }
1118                 case XPT_DEV_MATCH: {
1119                         struct cam_periph_map_info mapinfo;
1120                         struct cam_path *old_path;
1121
1122                         /*
1123                          * We can't deal with physical addresses for this
1124                          * type of transaction.
1125                          */
1126                         if (inccb->ccb_h.flags & CAM_DATA_PHYS) {
1127                                 error = EINVAL;
1128                                 break;
1129                         }
1130
1131                         /*
1132                          * Save this in case the caller had it set to
1133                          * something in particular.
1134                          */
1135                         old_path = inccb->ccb_h.path;
1136
1137                         /*
1138                          * We really don't need a path for the matching
1139                          * code.  The path is needed because of the
1140                          * debugging statements in xpt_action().  They
1141                          * assume that the CCB has a valid path.
1142                          */
1143                         inccb->ccb_h.path = xpt_periph->path;
1144
1145                         bzero(&mapinfo, sizeof(mapinfo));
1146
1147                         /*
1148                          * Map the pattern and match buffers into kernel
1149                          * virtual address space.
1150                          */
1151                         error = cam_periph_mapmem(inccb, &mapinfo);
1152
1153                         if (error) {
1154                                 inccb->ccb_h.path = old_path;
1155                                 break;
1156                         }
1157
1158                         /*
1159                          * This is an immediate CCB, we can send it on directly.
1160                          */
1161                         xpt_action(inccb);
1162
1163                         /*
1164                          * Map the buffers back into user space.
1165                          */
1166                         cam_periph_unmapmem(inccb, &mapinfo);
1167
1168                         inccb->ccb_h.path = old_path;
1169
1170                         error = 0;
1171                         break;
1172                 }
1173                 default:
1174                         error = ENOTSUP;
1175                         break;
1176                 }
1177                 break;
1178         }
1179         /*
1180          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
1181          * with the periphal driver name and unit name filled in.  The other
1182          * fields don't really matter as input.  The passthrough driver name
1183          * ("pass"), and unit number are passed back in the ccb.  The current
1184          * device generation number, and the index into the device peripheral
1185          * driver list, and the status are also passed back.  Note that
1186          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
1187          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
1188          * (or rather should be) impossible for the device peripheral driver
1189          * list to change since we look at the whole thing in one pass, and
1190          * we do it with splcam protection.
1191          *
1192          */
1193         case CAMGETPASSTHRU: {
1194                 union ccb *ccb;
1195                 struct cam_periph *periph;
1196                 struct periph_driver **p_drv;
1197                 char   *name;
1198                 u_int unit;
1199                 u_int cur_generation;
1200                 int base_periph_found;
1201                 int splbreaknum;
1202                 int s;
1203
1204                 ccb = (union ccb *)addr;
1205                 unit = ccb->cgdl.unit_number;
1206                 name = ccb->cgdl.periph_name;
1207                 /*
1208                  * Every 100 devices, we want to drop our spl protection to
1209                  * give the software interrupt handler a chance to run.
1210                  * Most systems won't run into this check, but this should
1211                  * avoid starvation in the software interrupt handler in
1212                  * large systems.
1213                  */
1214                 splbreaknum = 100;
1215
1216                 ccb = (union ccb *)addr;
1217
1218                 base_periph_found = 0;
1219
1220                 /*
1221                  * Sanity check -- make sure we don't get a null peripheral
1222                  * driver name.
1223                  */
1224                 if (*ccb->cgdl.periph_name == '\0') {
1225                         error = EINVAL;
1226                         break;
1227                 }
1228
1229                 /* Keep the list from changing while we traverse it */
1230                 s = splcam();
1231 ptstartover:
1232                 cur_generation = xsoftc.generation;
1233
1234                 /* first find our driver in the list of drivers */
1235                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
1236                         if (strcmp((*p_drv)->driver_name, name) == 0)
1237                                 break;
1238
1239                 if (*p_drv == NULL) {
1240                         splx(s);
1241                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1242                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1243                         *ccb->cgdl.periph_name = '\0';
1244                         ccb->cgdl.unit_number = 0;
1245                         error = ENOENT;
1246                         break;
1247                 }
1248
1249                 /*
1250                  * Run through every peripheral instance of this driver
1251                  * and check to see whether it matches the unit passed
1252                  * in by the user.  If it does, get out of the loops and
1253                  * find the passthrough driver associated with that
1254                  * peripheral driver.
1255                  */
1256                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
1257                      periph = TAILQ_NEXT(periph, unit_links)) {
1258
1259                         if (periph->unit_number == unit) {
1260                                 break;
1261                         } else if (--splbreaknum == 0) {
1262                                 splx(s);
1263                                 s = splcam();
1264                                 splbreaknum = 100;
1265                                 if (cur_generation != xsoftc.generation)
1266                                        goto ptstartover;
1267                         }
1268                 }
1269                 /*
1270                  * If we found the peripheral driver that the user passed
1271                  * in, go through all of the peripheral drivers for that
1272                  * particular device and look for a passthrough driver.
1273                  */
1274                 if (periph != NULL) {
1275                         struct cam_ed *device;
1276                         int i;
1277
1278                         base_periph_found = 1;
1279                         device = periph->path->device;
1280                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
1281                              periph != NULL;
1282                              periph = SLIST_NEXT(periph, periph_links), i++) {
1283                                 /*
1284                                  * Check to see whether we have a
1285                                  * passthrough device or not.
1286                                  */
1287                                 if (strcmp(periph->periph_name, "pass") == 0) {
1288                                         /*
1289                                          * Fill in the getdevlist fields.
1290                                          */
1291                                         strcpy(ccb->cgdl.periph_name,
1292                                                periph->periph_name);
1293                                         ccb->cgdl.unit_number =
1294                                                 periph->unit_number;
1295                                         if (SLIST_NEXT(periph, periph_links))
1296                                                 ccb->cgdl.status =
1297                                                         CAM_GDEVLIST_MORE_DEVS;
1298                                         else
1299                                                 ccb->cgdl.status =
1300                                                        CAM_GDEVLIST_LAST_DEVICE;
1301                                         ccb->cgdl.generation =
1302                                                 device->generation;
1303                                         ccb->cgdl.index = i;
1304                                         /*
1305                                          * Fill in some CCB header fields
1306                                          * that the user may want.
1307                                          */
1308                                         ccb->ccb_h.path_id =
1309                                                 periph->path->bus->path_id;
1310                                         ccb->ccb_h.target_id =
1311                                                 periph->path->target->target_id;
1312                                         ccb->ccb_h.target_lun =
1313                                                 periph->path->device->lun_id;
1314                                         ccb->ccb_h.status = CAM_REQ_CMP;
1315                                         break;
1316                                 }
1317                         }
1318                 }
1319
1320                 /*
1321                  * If the periph is null here, one of two things has
1322                  * happened.  The first possibility is that we couldn't
1323                  * find the unit number of the particular peripheral driver
1324                  * that the user is asking about.  e.g. the user asks for
1325                  * the passthrough driver for "da11".  We find the list of
1326                  * "da" peripherals all right, but there is no unit 11.
1327                  * The other possibility is that we went through the list
1328                  * of peripheral drivers attached to the device structure,
1329                  * but didn't find one with the name "pass".  Either way,
1330                  * we return ENOENT, since we couldn't find something.
1331                  */
1332                 if (periph == NULL) {
1333                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1334                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1335                         *ccb->cgdl.periph_name = '\0';
1336                         ccb->cgdl.unit_number = 0;
1337                         error = ENOENT;
1338                         /*
1339                          * It is unfortunate that this is even necessary,
1340                          * but there are many, many clueless users out there.
1341                          * If this is true, the user is looking for the
1342                          * passthrough driver, but doesn't have one in his
1343                          * kernel.
1344                          */
1345                         if (base_periph_found == 1) {
1346                                 printf("xptioctl: pass driver is not in the "
1347                                        "kernel\n");
1348                                 printf("xptioctl: put \"device pass0\" in "
1349                                        "your kernel config file\n");
1350                         }
1351                 }
1352                 splx(s);
1353                 break;
1354                 }
1355         default:
1356                 error = ENOTTY;
1357                 break;
1358         }
1359
1360         return(error);
1361 }
1362
1363 static int
1364 cam_module_event_handler(module_t mod, int what, void *arg)
1365 {
1366         if (what == MOD_LOAD) {
1367                 xpt_init(NULL);
1368         } else if (what == MOD_UNLOAD) {
1369                 return EBUSY;
1370         } else {
1371                 return EOPNOTSUPP;
1372         }
1373
1374         return 0;
1375 }
1376
1377 /* Functions accessed by the peripheral drivers */
1378 static void
1379 xpt_init(dummy)
1380         void *dummy;
1381 {
1382         struct cam_sim *xpt_sim;
1383         struct cam_path *path;
1384         struct cam_devq *devq;
1385         cam_status status;
1386
1387         TAILQ_INIT(&xpt_busses);
1388         TAILQ_INIT(&cam_bioq);
1389         SLIST_INIT(&ccb_freeq);
1390         STAILQ_INIT(&highpowerq);
1391
1392         mtx_init(&cam_bioq_lock, "CAM BIOQ lock", NULL, MTX_DEF);
1393
1394         /*
1395          * The xpt layer is, itself, the equivelent of a SIM.
1396          * Allow 16 ccbs in the ccb pool for it.  This should
1397          * give decent parallelism when we probe busses and
1398          * perform other XPT functions.
1399          */
1400         devq = cam_simq_alloc(16);
1401         xpt_sim = cam_sim_alloc(xptaction,
1402                                 xptpoll,
1403                                 "xpt",
1404                                 /*softc*/NULL,
1405                                 /*unit*/0,
1406                                 /*max_dev_transactions*/0,
1407                                 /*max_tagged_dev_transactions*/0,
1408                                 devq);
1409         xpt_max_ccbs = 16;
1410
1411         xpt_bus_register(xpt_sim, /*bus #*/0);
1412
1413         /*
1414          * Looking at the XPT from the SIM layer, the XPT is
1415          * the equivelent of a peripheral driver.  Allocate
1416          * a peripheral driver entry for us.
1417          */
1418         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
1419                                       CAM_TARGET_WILDCARD,
1420                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
1421                 printf("xpt_init: xpt_create_path failed with status %#x,"
1422                        " failing attach\n", status);
1423                 return;
1424         }
1425
1426         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
1427                          path, NULL, 0, NULL);
1428         xpt_free_path(path);
1429
1430         xpt_sim->softc = xpt_periph;
1431
1432         /*
1433          * Register a callback for when interrupts are enabled.
1434          */
1435         xpt_config_hook =
1436             (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
1437                                               M_TEMP, M_NOWAIT | M_ZERO);
1438         if (xpt_config_hook == NULL) {
1439                 printf("xpt_init: Cannot malloc config hook "
1440                        "- failing attach\n");
1441                 return;
1442         }
1443
1444         xpt_config_hook->ich_func = xpt_config;
1445         if (config_intrhook_establish(xpt_config_hook) != 0) {
1446                 free (xpt_config_hook, M_TEMP);
1447                 printf("xpt_init: config_intrhook_establish failed "
1448                        "- failing attach\n");
1449         }
1450
1451         /* Install our software interrupt handlers */
1452         swi_add(NULL, "cambio", camisr, &cam_bioq, SWI_CAMBIO, 0, &cambio_ih);
1453 }
1454
1455 static cam_status
1456 xptregister(struct cam_periph *periph, void *arg)
1457 {
1458         if (periph == NULL) {
1459                 printf("xptregister: periph was NULL!!\n");
1460                 return(CAM_REQ_CMP_ERR);
1461         }
1462
1463         periph->softc = NULL;
1464
1465         xpt_periph = periph;
1466
1467         return(CAM_REQ_CMP);
1468 }
1469
1470 int32_t
1471 xpt_add_periph(struct cam_periph *periph)
1472 {
1473         struct cam_ed *device;
1474         int32_t  status;
1475         struct periph_list *periph_head;
1476
1477         GIANT_REQUIRED;
1478
1479         device = periph->path->device;
1480
1481         periph_head = &device->periphs;
1482
1483         status = CAM_REQ_CMP;
1484
1485         if (device != NULL) {
1486                 int s;
1487
1488                 /*
1489                  * Make room for this peripheral
1490                  * so it will fit in the queue
1491                  * when it's scheduled to run
1492                  */
1493                 s = splsoftcam();
1494                 status = camq_resize(&device->drvq,
1495                                      device->drvq.array_size + 1);
1496
1497                 device->generation++;
1498
1499                 SLIST_INSERT_HEAD(periph_head, periph, periph_links);
1500
1501                 splx(s);
1502         }
1503
1504         xsoftc.generation++;
1505
1506         return (status);
1507 }
1508
1509 void
1510 xpt_remove_periph(struct cam_periph *periph)
1511 {
1512         struct cam_ed *device;
1513
1514         GIANT_REQUIRED;
1515
1516         device = periph->path->device;
1517
1518         if (device != NULL) {
1519                 int s;
1520                 struct periph_list *periph_head;
1521
1522                 periph_head = &device->periphs;
1523
1524                 /* Release the slot for this peripheral */
1525                 s = splsoftcam();
1526                 camq_resize(&device->drvq, device->drvq.array_size - 1);
1527
1528                 device->generation++;
1529
1530                 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links);
1531
1532                 splx(s);
1533         }
1534
1535         xsoftc.generation++;
1536
1537 }
1538
1539 #ifdef CAM_NEW_TRAN_CODE
1540
1541 void
1542 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1543 {
1544         struct  ccb_pathinq cpi;
1545         struct  ccb_trans_settings cts;
1546         struct  cam_path *path;
1547         u_int   speed;
1548         u_int   freq;
1549         u_int   mb;
1550         int     s;
1551
1552         GIANT_REQUIRED;
1553
1554         path = periph->path;
1555         /*
1556          * To ensure that this is printed in one piece,
1557          * mask out CAM interrupts.
1558          */
1559         s = splsoftcam();
1560         printf("%s%d at %s%d bus %d target %d lun %d\n",
1561                periph->periph_name, periph->unit_number,
1562                path->bus->sim->sim_name,
1563                path->bus->sim->unit_number,
1564                path->bus->sim->bus_id,
1565                path->target->target_id,
1566                path->device->lun_id);
1567         printf("%s%d: ", periph->periph_name, periph->unit_number);
1568         scsi_print_inquiry(&path->device->inq_data);
1569         if (bootverbose && path->device->serial_num_len > 0) {
1570                 /* Don't wrap the screen  - print only the first 60 chars */
1571                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1572                        periph->unit_number, path->device->serial_num);
1573         }
1574         xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
1575         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1576         cts.type = CTS_TYPE_CURRENT_SETTINGS;
1577         xpt_action((union ccb*)&cts);
1578
1579         /* Ask the SIM for its base transfer speed */
1580         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1581         cpi.ccb_h.func_code = XPT_PATH_INQ;
1582         xpt_action((union ccb *)&cpi);
1583
1584         speed = cpi.base_transfer_speed;
1585         freq = 0;
1586         if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) {
1587                 struct  ccb_trans_settings_spi *spi;
1588
1589                 spi = &cts.xport_specific.spi;
1590                 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0
1591                   && spi->sync_offset != 0) {
1592                         freq = scsi_calc_syncsrate(spi->sync_period);
1593                         speed = freq;
1594                 }
1595
1596                 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0)
1597                         speed *= (0x01 << spi->bus_width);
1598         }
1599
1600         if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) {
1601                 struct  ccb_trans_settings_fc *fc = &cts.xport_specific.fc;
1602                 if (fc->valid & CTS_FC_VALID_SPEED) {
1603                         speed = fc->bitrate;
1604                 }
1605         }
1606
1607         mb = speed / 1000;
1608         if (mb > 0)
1609                 printf("%s%d: %d.%03dMB/s transfers",
1610                        periph->periph_name, periph->unit_number,
1611                        mb, speed % 1000);
1612         else
1613                 printf("%s%d: %dKB/s transfers", periph->periph_name,
1614                        periph->unit_number, speed);
1615         /* Report additional information about SPI connections */
1616         if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) {
1617                 struct  ccb_trans_settings_spi *spi;
1618
1619                 spi = &cts.xport_specific.spi;
1620                 if (freq != 0) {
1621                         printf(" (%d.%03dMHz%s, offset %d", freq / 1000,
1622                                freq % 1000,
1623                                (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0
1624                              ? " DT" : "",
1625                                spi->sync_offset);
1626                 }
1627                 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0
1628                  && spi->bus_width > 0) {
1629                         if (freq != 0) {
1630                                 printf(", ");
1631                         } else {
1632                                 printf(" (");
1633                         }
1634                         printf("%dbit)", 8 * (0x01 << spi->bus_width));
1635                 } else if (freq != 0) {
1636                         printf(")");
1637                 }
1638         }
1639         if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) {
1640                 struct  ccb_trans_settings_fc *fc;
1641
1642                 fc = &cts.xport_specific.fc;
1643                 if (fc->valid & CTS_FC_VALID_WWNN)
1644                         printf(" WWNN 0x%llx", (long long) fc->wwnn);
1645                 if (fc->valid & CTS_FC_VALID_WWPN)
1646                         printf(" WWPN 0x%llx", (long long) fc->wwpn);
1647                 if (fc->valid & CTS_FC_VALID_PORT)
1648                         printf(" PortID 0x%x", fc->port);
1649         }
1650
1651         if (path->device->inq_flags & SID_CmdQue
1652          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1653                 printf("\n%s%d: Tagged Queueing Enabled",
1654                        periph->periph_name, periph->unit_number);
1655         }
1656         printf("\n");
1657
1658         /*
1659          * We only want to print the caller's announce string if they've
1660          * passed one in..
1661          */
1662         if (announce_string != NULL)
1663                 printf("%s%d: %s\n", periph->periph_name,
1664                        periph->unit_number, announce_string);
1665         splx(s);
1666 }
1667 #else /* CAM_NEW_TRAN_CODE */
1668 void
1669 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1670 {
1671         int s;
1672         u_int mb;
1673         struct cam_path *path;
1674         struct ccb_trans_settings cts;
1675
1676         GIANT_REQUIRED;
1677
1678         path = periph->path;
1679         /*
1680          * To ensure that this is printed in one piece,
1681          * mask out CAM interrupts.
1682          */
1683         s = splsoftcam();
1684         printf("%s%d at %s%d bus %d target %d lun %d\n",
1685                periph->periph_name, periph->unit_number,
1686                path->bus->sim->sim_name,
1687                path->bus->sim->unit_number,
1688                path->bus->sim->bus_id,
1689                path->target->target_id,
1690                path->device->lun_id);
1691         printf("%s%d: ", periph->periph_name, periph->unit_number);
1692         scsi_print_inquiry(&path->device->inq_data);
1693         if ((bootverbose)
1694          && (path->device->serial_num_len > 0)) {
1695                 /* Don't wrap the screen  - print only the first 60 chars */
1696                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1697                        periph->unit_number, path->device->serial_num);
1698         }
1699         xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
1700         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1701         cts.flags = CCB_TRANS_CURRENT_SETTINGS;
1702         xpt_action((union ccb*)&cts);
1703         if (cts.ccb_h.status == CAM_REQ_CMP) {
1704                 u_int speed;
1705                 u_int freq;
1706
1707                 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1708                   && cts.sync_offset != 0) {
1709                         freq = scsi_calc_syncsrate(cts.sync_period);
1710                         speed = freq;
1711                 } else {
1712                         struct ccb_pathinq cpi;
1713
1714                         /* Ask the SIM for its base transfer speed */
1715                         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1716                         cpi.ccb_h.func_code = XPT_PATH_INQ;
1717                         xpt_action((union ccb *)&cpi);
1718
1719                         speed = cpi.base_transfer_speed;
1720                         freq = 0;
1721                 }
1722                 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0)
1723                         speed *= (0x01 << cts.bus_width);
1724                 mb = speed / 1000;
1725                 if (mb > 0)
1726                         printf("%s%d: %d.%03dMB/s transfers",
1727                                periph->periph_name, periph->unit_number,
1728                                mb, speed % 1000);
1729                 else
1730                         printf("%s%d: %dKB/s transfers", periph->periph_name,
1731                                periph->unit_number, speed);
1732                 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1733                  && cts.sync_offset != 0) {
1734                         printf(" (%d.%03dMHz, offset %d", freq / 1000,
1735                                freq % 1000, cts.sync_offset);
1736                 }
1737                 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0
1738                  && cts.bus_width > 0) {
1739                         if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1740                          && cts.sync_offset != 0) {
1741                                 printf(", ");
1742                         } else {
1743                                 printf(" (");
1744                         }
1745                         printf("%dbit)", 8 * (0x01 << cts.bus_width));
1746                 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1747                         && cts.sync_offset != 0) {
1748                         printf(")");
1749                 }
1750
1751                 if (path->device->inq_flags & SID_CmdQue
1752                  || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1753                         printf(", Tagged Queueing Enabled");
1754                 }
1755
1756                 printf("\n");
1757         } else if (path->device->inq_flags & SID_CmdQue
1758                 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1759                 printf("%s%d: Tagged Queueing Enabled\n",
1760                        periph->periph_name, periph->unit_number);
1761         }
1762
1763         /*
1764          * We only want to print the caller's announce string if they've
1765          * passed one in..
1766          */
1767         if (announce_string != NULL)
1768                 printf("%s%d: %s\n", periph->periph_name,
1769                        periph->unit_number, announce_string);
1770         splx(s);
1771 }
1772
1773 #endif /* CAM_NEW_TRAN_CODE */
1774
1775 static dev_match_ret
1776 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1777             struct cam_eb *bus)
1778 {
1779         dev_match_ret retval;
1780         int i;
1781
1782         retval = DM_RET_NONE;
1783
1784         /*
1785          * If we aren't given something to match against, that's an error.
1786          */
1787         if (bus == NULL)
1788                 return(DM_RET_ERROR);
1789
1790         /*
1791          * If there are no match entries, then this bus matches no
1792          * matter what.
1793          */
1794         if ((patterns == NULL) || (num_patterns == 0))
1795                 return(DM_RET_DESCEND | DM_RET_COPY);
1796
1797         for (i = 0; i < num_patterns; i++) {
1798                 struct bus_match_pattern *cur_pattern;
1799
1800                 /*
1801                  * If the pattern in question isn't for a bus node, we
1802                  * aren't interested.  However, we do indicate to the
1803                  * calling routine that we should continue descending the
1804                  * tree, since the user wants to match against lower-level
1805                  * EDT elements.
1806                  */
1807                 if (patterns[i].type != DEV_MATCH_BUS) {
1808                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1809                                 retval |= DM_RET_DESCEND;
1810                         continue;
1811                 }
1812
1813                 cur_pattern = &patterns[i].pattern.bus_pattern;
1814
1815                 /*
1816                  * If they want to match any bus node, we give them any
1817                  * device node.
1818                  */
1819                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1820                         /* set the copy flag */
1821                         retval |= DM_RET_COPY;
1822
1823                         /*
1824                          * If we've already decided on an action, go ahead
1825                          * and return.
1826                          */
1827                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1828                                 return(retval);
1829                 }
1830
1831                 /*
1832                  * Not sure why someone would do this...
1833                  */
1834                 if (cur_pattern->flags == BUS_MATCH_NONE)
1835                         continue;
1836
1837                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1838                  && (cur_pattern->path_id != bus->path_id))
1839                         continue;
1840
1841                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1842                  && (cur_pattern->bus_id != bus->sim->bus_id))
1843                         continue;
1844
1845                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1846                  && (cur_pattern->unit_number != bus->sim->unit_number))
1847                         continue;
1848
1849                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1850                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1851                              DEV_IDLEN) != 0))
1852                         continue;
1853
1854                 /*
1855                  * If we get to this point, the user definitely wants
1856                  * information on this bus.  So tell the caller to copy the
1857                  * data out.
1858                  */
1859                 retval |= DM_RET_COPY;
1860
1861                 /*
1862                  * If the return action has been set to descend, then we
1863                  * know that we've already seen a non-bus matching
1864                  * expression, therefore we need to further descend the tree.
1865                  * This won't change by continuing around the loop, so we
1866                  * go ahead and return.  If we haven't seen a non-bus
1867                  * matching expression, we keep going around the loop until
1868                  * we exhaust the matching expressions.  We'll set the stop
1869                  * flag once we fall out of the loop.
1870                  */
1871                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1872                         return(retval);
1873         }
1874
1875         /*
1876          * If the return action hasn't been set to descend yet, that means
1877          * we haven't seen anything other than bus matching patterns.  So
1878          * tell the caller to stop descending the tree -- the user doesn't
1879          * want to match against lower level tree elements.
1880          */
1881         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1882                 retval |= DM_RET_STOP;
1883
1884         return(retval);
1885 }
1886
1887 static dev_match_ret
1888 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1889                struct cam_ed *device)
1890 {
1891         dev_match_ret retval;
1892         int i;
1893
1894         retval = DM_RET_NONE;
1895
1896         /*
1897          * If we aren't given something to match against, that's an error.
1898          */
1899         if (device == NULL)
1900                 return(DM_RET_ERROR);
1901
1902         /*
1903          * If there are no match entries, then this device matches no
1904          * matter what.
1905          */
1906         if ((patterns == NULL) || (num_patterns == 0))
1907                 return(DM_RET_DESCEND | DM_RET_COPY);
1908
1909         for (i = 0; i < num_patterns; i++) {
1910                 struct device_match_pattern *cur_pattern;
1911
1912                 /*
1913                  * If the pattern in question isn't for a device node, we
1914                  * aren't interested.
1915                  */
1916                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1917                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1918                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1919                                 retval |= DM_RET_DESCEND;
1920                         continue;
1921                 }
1922
1923                 cur_pattern = &patterns[i].pattern.device_pattern;
1924
1925                 /*
1926                  * If they want to match any device node, we give them any
1927                  * device node.
1928                  */
1929                 if (cur_pattern->flags == DEV_MATCH_ANY) {
1930                         /* set the copy flag */
1931                         retval |= DM_RET_COPY;
1932
1933
1934                         /*
1935                          * If we've already decided on an action, go ahead
1936                          * and return.
1937                          */
1938                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1939                                 return(retval);
1940                 }
1941
1942                 /*
1943                  * Not sure why someone would do this...
1944                  */
1945                 if (cur_pattern->flags == DEV_MATCH_NONE)
1946                         continue;
1947
1948                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1949                  && (cur_pattern->path_id != device->target->bus->path_id))
1950                         continue;
1951
1952                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1953                  && (cur_pattern->target_id != device->target->target_id))
1954                         continue;
1955
1956                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1957                  && (cur_pattern->target_lun != device->lun_id))
1958                         continue;
1959
1960                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1961                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1962                                     (caddr_t)&cur_pattern->inq_pat,
1963                                     1, sizeof(cur_pattern->inq_pat),
1964                                     scsi_static_inquiry_match) == NULL))
1965                         continue;
1966
1967                 /*
1968                  * If we get to this point, the user definitely wants
1969                  * information on this device.  So tell the caller to copy
1970                  * the data out.
1971                  */
1972                 retval |= DM_RET_COPY;
1973
1974                 /*
1975                  * If the return action has been set to descend, then we
1976                  * know that we've already seen a peripheral matching
1977                  * expression, therefore we need to further descend the tree.
1978                  * This won't change by continuing around the loop, so we
1979                  * go ahead and return.  If we haven't seen a peripheral
1980                  * matching expression, we keep going around the loop until
1981                  * we exhaust the matching expressions.  We'll set the stop
1982                  * flag once we fall out of the loop.
1983                  */
1984                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1985                         return(retval);
1986         }
1987
1988         /*
1989          * If the return action hasn't been set to descend yet, that means
1990          * we haven't seen any peripheral matching patterns.  So tell the
1991          * caller to stop descending the tree -- the user doesn't want to
1992          * match against lower level tree elements.
1993          */
1994         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1995                 retval |= DM_RET_STOP;
1996
1997         return(retval);
1998 }
1999
2000 /*
2001  * Match a single peripheral against any number of match patterns.
2002  */
2003 static dev_match_ret
2004 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
2005                struct cam_periph *periph)
2006 {
2007         dev_match_ret retval;
2008         int i;
2009
2010         /*
2011          * If we aren't given something to match against, that's an error.
2012          */
2013         if (periph == NULL)
2014                 return(DM_RET_ERROR);
2015
2016         /*
2017          * If there are no match entries, then this peripheral matches no
2018          * matter what.
2019          */
2020         if ((patterns == NULL) || (num_patterns == 0))
2021                 return(DM_RET_STOP | DM_RET_COPY);
2022
2023         /*
2024          * There aren't any nodes below a peripheral node, so there's no
2025          * reason to descend the tree any further.
2026          */
2027         retval = DM_RET_STOP;
2028
2029         for (i = 0; i < num_patterns; i++) {
2030                 struct periph_match_pattern *cur_pattern;
2031
2032                 /*
2033                  * If the pattern in question isn't for a peripheral, we
2034                  * aren't interested.
2035                  */
2036                 if (patterns[i].type != DEV_MATCH_PERIPH)
2037                         continue;
2038
2039                 cur_pattern = &patterns[i].pattern.periph_pattern;
2040
2041                 /*
2042                  * If they want to match on anything, then we will do so.
2043                  */
2044                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
2045                         /* set the copy flag */
2046                         retval |= DM_RET_COPY;
2047
2048                         /*
2049                          * We've already set the return action to stop,
2050                          * since there are no nodes below peripherals in
2051                          * the tree.
2052                          */
2053                         return(retval);
2054                 }
2055
2056                 /*
2057                  * Not sure why someone would do this...
2058                  */
2059                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
2060                         continue;
2061
2062                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
2063                  && (cur_pattern->path_id != periph->path->bus->path_id))
2064                         continue;
2065
2066                 /*
2067                  * For the target and lun id's, we have to make sure the
2068                  * target and lun pointers aren't NULL.  The xpt peripheral
2069                  * has a wildcard target and device.
2070                  */
2071                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
2072                  && ((periph->path->target == NULL)
2073                  ||(cur_pattern->target_id != periph->path->target->target_id)))
2074                         continue;
2075
2076                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
2077                  && ((periph->path->device == NULL)
2078                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
2079                         continue;
2080
2081                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
2082                  && (cur_pattern->unit_number != periph->unit_number))
2083                         continue;
2084
2085                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
2086                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
2087                              DEV_IDLEN) != 0))
2088                         continue;
2089
2090                 /*
2091                  * If we get to this point, the user definitely wants
2092                  * information on this peripheral.  So tell the caller to
2093                  * copy the data out.
2094                  */
2095                 retval |= DM_RET_COPY;
2096
2097                 /*
2098                  * The return action has already been set to stop, since
2099                  * peripherals don't have any nodes below them in the EDT.
2100                  */
2101                 return(retval);
2102         }
2103
2104         /*
2105          * If we get to this point, the peripheral that was passed in
2106          * doesn't match any of the patterns.
2107          */
2108         return(retval);
2109 }
2110
2111 static int
2112 xptedtbusfunc(struct cam_eb *bus, void *arg)
2113 {
2114         struct ccb_dev_match *cdm;
2115         dev_match_ret retval;
2116
2117         cdm = (struct ccb_dev_match *)arg;
2118
2119         /*
2120          * If our position is for something deeper in the tree, that means
2121          * that we've already seen this node.  So, we keep going down.
2122          */
2123         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2124          && (cdm->pos.cookie.bus == bus)
2125          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2126          && (cdm->pos.cookie.target != NULL))
2127                 retval = DM_RET_DESCEND;
2128         else
2129                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
2130
2131         /*
2132          * If we got an error, bail out of the search.
2133          */
2134         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2135                 cdm->status = CAM_DEV_MATCH_ERROR;
2136                 return(0);
2137         }
2138
2139         /*
2140          * If the copy flag is set, copy this bus out.
2141          */
2142         if (retval & DM_RET_COPY) {
2143                 int spaceleft, j;
2144
2145                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2146                         sizeof(struct dev_match_result));
2147
2148                 /*
2149                  * If we don't have enough space to put in another
2150                  * match result, save our position and tell the
2151                  * user there are more devices to check.
2152                  */
2153                 if (spaceleft < sizeof(struct dev_match_result)) {
2154                         bzero(&cdm->pos, sizeof(cdm->pos));
2155                         cdm->pos.position_type =
2156                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
2157
2158                         cdm->pos.cookie.bus = bus;
2159                         cdm->pos.generations[CAM_BUS_GENERATION]=
2160                                 bus_generation;
2161                         cdm->status = CAM_DEV_MATCH_MORE;
2162                         return(0);
2163                 }
2164                 j = cdm->num_matches;
2165                 cdm->num_matches++;
2166                 cdm->matches[j].type = DEV_MATCH_BUS;
2167                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
2168                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
2169                 cdm->matches[j].result.bus_result.unit_number =
2170                         bus->sim->unit_number;
2171                 strncpy(cdm->matches[j].result.bus_result.dev_name,
2172                         bus->sim->sim_name, DEV_IDLEN);
2173         }
2174
2175         /*
2176          * If the user is only interested in busses, there's no
2177          * reason to descend to the next level in the tree.
2178          */
2179         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2180                 return(1);
2181
2182         /*
2183          * If there is a target generation recorded, check it to
2184          * make sure the target list hasn't changed.
2185          */
2186         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2187          && (bus == cdm->pos.cookie.bus)
2188          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2189          && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0)
2190          && (cdm->pos.generations[CAM_TARGET_GENERATION] !=
2191              bus->generation)) {
2192                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2193                 return(0);
2194         }
2195
2196         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2197          && (cdm->pos.cookie.bus == bus)
2198          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2199          && (cdm->pos.cookie.target != NULL))
2200                 return(xpttargettraverse(bus,
2201                                         (struct cam_et *)cdm->pos.cookie.target,
2202                                          xptedttargetfunc, arg));
2203         else
2204                 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg));
2205 }
2206
2207 static int
2208 xptedttargetfunc(struct cam_et *target, void *arg)
2209 {
2210         struct ccb_dev_match *cdm;
2211
2212         cdm = (struct ccb_dev_match *)arg;
2213
2214         /*
2215          * If there is a device list generation recorded, check it to
2216          * make sure the device list hasn't changed.
2217          */
2218         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2219          && (cdm->pos.cookie.bus == target->bus)
2220          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2221          && (cdm->pos.cookie.target == target)
2222          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2223          && (cdm->pos.generations[CAM_DEV_GENERATION] != 0)
2224          && (cdm->pos.generations[CAM_DEV_GENERATION] !=
2225              target->generation)) {
2226                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2227                 return(0);
2228         }
2229
2230         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2231          && (cdm->pos.cookie.bus == target->bus)
2232          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2233          && (cdm->pos.cookie.target == target)
2234          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2235          && (cdm->pos.cookie.device != NULL))
2236                 return(xptdevicetraverse(target,
2237                                         (struct cam_ed *)cdm->pos.cookie.device,
2238                                          xptedtdevicefunc, arg));
2239         else
2240                 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg));
2241 }
2242
2243 static int
2244 xptedtdevicefunc(struct cam_ed *device, void *arg)
2245 {
2246
2247         struct ccb_dev_match *cdm;
2248         dev_match_ret retval;
2249
2250         cdm = (struct ccb_dev_match *)arg;
2251
2252         /*
2253          * If our position is for something deeper in the tree, that means
2254          * that we've already seen this node.  So, we keep going down.
2255          */
2256         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2257          && (cdm->pos.cookie.device == device)
2258          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2259          && (cdm->pos.cookie.periph != NULL))
2260                 retval = DM_RET_DESCEND;
2261         else
2262                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
2263                                         device);
2264
2265         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2266                 cdm->status = CAM_DEV_MATCH_ERROR;
2267                 return(0);
2268         }
2269
2270         /*
2271          * If the copy flag is set, copy this device out.
2272          */
2273         if (retval & DM_RET_COPY) {
2274                 int spaceleft, j;
2275
2276                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2277                         sizeof(struct dev_match_result));
2278
2279                 /*
2280                  * If we don't have enough space to put in another
2281                  * match result, save our position and tell the
2282                  * user there are more devices to check.
2283                  */
2284                 if (spaceleft < sizeof(struct dev_match_result)) {
2285                         bzero(&cdm->pos, sizeof(cdm->pos));
2286                         cdm->pos.position_type =
2287                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2288                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
2289
2290                         cdm->pos.cookie.bus = device->target->bus;
2291                         cdm->pos.generations[CAM_BUS_GENERATION]=
2292                                 bus_generation;
2293                         cdm->pos.cookie.target = device->target;
2294                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2295                                 device->target->bus->generation;
2296                         cdm->pos.cookie.device = device;
2297                         cdm->pos.generations[CAM_DEV_GENERATION] =
2298                                 device->target->generation;
2299                         cdm->status = CAM_DEV_MATCH_MORE;
2300                         return(0);
2301                 }
2302                 j = cdm->num_matches;
2303                 cdm->num_matches++;
2304                 cdm->matches[j].type = DEV_MATCH_DEVICE;
2305                 cdm->matches[j].result.device_result.path_id =
2306                         device->target->bus->path_id;
2307                 cdm->matches[j].result.device_result.target_id =
2308                         device->target->target_id;
2309                 cdm->matches[j].result.device_result.target_lun =
2310                         device->lun_id;
2311                 bcopy(&device->inq_data,
2312                       &cdm->matches[j].result.device_result.inq_data,
2313                       sizeof(struct scsi_inquiry_data));
2314
2315                 /* Let the user know whether this device is unconfigured */
2316                 if (device->flags & CAM_DEV_UNCONFIGURED)
2317                         cdm->matches[j].result.device_result.flags =
2318                                 DEV_RESULT_UNCONFIGURED;
2319                 else
2320                         cdm->matches[j].result.device_result.flags =
2321                                 DEV_RESULT_NOFLAG;
2322         }
2323
2324         /*
2325          * If the user isn't interested in peripherals, don't descend
2326          * the tree any further.
2327          */
2328         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2329                 return(1);
2330
2331         /*
2332          * If there is a peripheral list generation recorded, make sure
2333          * it hasn't changed.
2334          */
2335         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2336          && (device->target->bus == cdm->pos.cookie.bus)
2337          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2338          && (device->target == cdm->pos.cookie.target)
2339          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2340          && (device == cdm->pos.cookie.device)
2341          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2342          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2343          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2344              device->generation)){
2345                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2346                 return(0);
2347         }
2348
2349         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2350          && (cdm->pos.cookie.bus == device->target->bus)
2351          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2352          && (cdm->pos.cookie.target == device->target)
2353          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2354          && (cdm->pos.cookie.device == device)
2355          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2356          && (cdm->pos.cookie.periph != NULL))
2357                 return(xptperiphtraverse(device,
2358                                 (struct cam_periph *)cdm->pos.cookie.periph,
2359                                 xptedtperiphfunc, arg));
2360         else
2361                 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg));
2362 }
2363
2364 static int
2365 xptedtperiphfunc(struct cam_periph *periph, void *arg)
2366 {
2367         struct ccb_dev_match *cdm;
2368         dev_match_ret retval;
2369
2370         cdm = (struct ccb_dev_match *)arg;
2371
2372         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2373
2374         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2375                 cdm->status = CAM_DEV_MATCH_ERROR;
2376                 return(0);
2377         }
2378
2379         /*
2380          * If the copy flag is set, copy this peripheral out.
2381          */
2382         if (retval & DM_RET_COPY) {
2383                 int spaceleft, j;
2384
2385                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2386                         sizeof(struct dev_match_result));
2387
2388                 /*
2389                  * If we don't have enough space to put in another
2390                  * match result, save our position and tell the
2391                  * user there are more devices to check.
2392                  */
2393                 if (spaceleft < sizeof(struct dev_match_result)) {
2394                         bzero(&cdm->pos, sizeof(cdm->pos));
2395                         cdm->pos.position_type =
2396                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2397                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
2398                                 CAM_DEV_POS_PERIPH;
2399
2400                         cdm->pos.cookie.bus = periph->path->bus;
2401                         cdm->pos.generations[CAM_BUS_GENERATION]=
2402                                 bus_generation;
2403                         cdm->pos.cookie.target = periph->path->target;
2404                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2405                                 periph->path->bus->generation;
2406                         cdm->pos.cookie.device = periph->path->device;
2407                         cdm->pos.generations[CAM_DEV_GENERATION] =
2408                                 periph->path->target->generation;
2409                         cdm->pos.cookie.periph = periph;
2410                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2411                                 periph->path->device->generation;
2412                         cdm->status = CAM_DEV_MATCH_MORE;
2413                         return(0);
2414                 }
2415
2416                 j = cdm->num_matches;
2417                 cdm->num_matches++;
2418                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2419                 cdm->matches[j].result.periph_result.path_id =
2420                         periph->path->bus->path_id;
2421                 cdm->matches[j].result.periph_result.target_id =
2422                         periph->path->target->target_id;
2423                 cdm->matches[j].result.periph_result.target_lun =
2424                         periph->path->device->lun_id;
2425                 cdm->matches[j].result.periph_result.unit_number =
2426                         periph->unit_number;
2427                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2428                         periph->periph_name, DEV_IDLEN);
2429         }
2430
2431         return(1);
2432 }
2433
2434 static int
2435 xptedtmatch(struct ccb_dev_match *cdm)
2436 {
2437         int ret;
2438
2439         cdm->num_matches = 0;
2440
2441         /*
2442          * Check the bus list generation.  If it has changed, the user
2443          * needs to reset everything and start over.
2444          */
2445         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2446          && (cdm->pos.generations[CAM_BUS_GENERATION] != 0)
2447          && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) {
2448                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2449                 return(0);
2450         }
2451
2452         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2453          && (cdm->pos.cookie.bus != NULL))
2454                 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus,
2455                                      xptedtbusfunc, cdm);
2456         else
2457                 ret = xptbustraverse(NULL, xptedtbusfunc, cdm);
2458
2459         /*
2460          * If we get back 0, that means that we had to stop before fully
2461          * traversing the EDT.  It also means that one of the subroutines
2462          * has set the status field to the proper value.  If we get back 1,
2463          * we've fully traversed the EDT and copied out any matching entries.
2464          */
2465         if (ret == 1)
2466                 cdm->status = CAM_DEV_MATCH_LAST;
2467
2468         return(ret);
2469 }
2470
2471 static int
2472 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2473 {
2474         struct ccb_dev_match *cdm;
2475
2476         cdm = (struct ccb_dev_match *)arg;
2477
2478         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2479          && (cdm->pos.cookie.pdrv == pdrv)
2480          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2481          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2482          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2483              (*pdrv)->generation)) {
2484                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2485                 return(0);
2486         }
2487
2488         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2489          && (cdm->pos.cookie.pdrv == pdrv)
2490          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2491          && (cdm->pos.cookie.periph != NULL))
2492                 return(xptpdperiphtraverse(pdrv,
2493                                 (struct cam_periph *)cdm->pos.cookie.periph,
2494                                 xptplistperiphfunc, arg));
2495         else
2496                 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg));
2497 }
2498
2499 static int
2500 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2501 {
2502         struct ccb_dev_match *cdm;
2503         dev_match_ret retval;
2504
2505         cdm = (struct ccb_dev_match *)arg;
2506
2507         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2508
2509         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2510                 cdm->status = CAM_DEV_MATCH_ERROR;
2511                 return(0);
2512         }
2513
2514         /*
2515          * If the copy flag is set, copy this peripheral out.
2516          */
2517         if (retval & DM_RET_COPY) {
2518                 int spaceleft, j;
2519
2520                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2521                         sizeof(struct dev_match_result));
2522
2523                 /*
2524                  * If we don't have enough space to put in another
2525                  * match result, save our position and tell the
2526                  * user there are more devices to check.
2527                  */
2528                 if (spaceleft < sizeof(struct dev_match_result)) {
2529                         struct periph_driver **pdrv;
2530
2531                         pdrv = NULL;
2532                         bzero(&cdm->pos, sizeof(cdm->pos));
2533                         cdm->pos.position_type =
2534                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2535                                 CAM_DEV_POS_PERIPH;
2536
2537                         /*
2538                          * This may look a bit non-sensical, but it is
2539                          * actually quite logical.  There are very few
2540                          * peripheral drivers, and bloating every peripheral
2541                          * structure with a pointer back to its parent
2542                          * peripheral driver linker set entry would cost
2543                          * more in the long run than doing this quick lookup.
2544                          */
2545                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2546                                 if (strcmp((*pdrv)->driver_name,
2547                                     periph->periph_name) == 0)
2548                                         break;
2549                         }
2550
2551                         if (*pdrv == NULL) {
2552                                 cdm->status = CAM_DEV_MATCH_ERROR;
2553                                 return(0);
2554                         }
2555
2556                         cdm->pos.cookie.pdrv = pdrv;
2557                         /*
2558                          * The periph generation slot does double duty, as
2559                          * does the periph pointer slot.  They are used for
2560                          * both edt and pdrv lookups and positioning.
2561                          */
2562                         cdm->pos.cookie.periph = periph;
2563                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2564                                 (*pdrv)->generation;
2565                         cdm->status = CAM_DEV_MATCH_MORE;
2566                         return(0);
2567                 }
2568
2569                 j = cdm->num_matches;
2570                 cdm->num_matches++;
2571                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2572                 cdm->matches[j].result.periph_result.path_id =
2573                         periph->path->bus->path_id;
2574
2575                 /*
2576                  * The transport layer peripheral doesn't have a target or
2577                  * lun.
2578                  */
2579                 if (periph->path->target)
2580                         cdm->matches[j].result.periph_result.target_id =
2581                                 periph->path->target->target_id;
2582                 else
2583                         cdm->matches[j].result.periph_result.target_id = -1;
2584
2585                 if (periph->path->device)
2586                         cdm->matches[j].result.periph_result.target_lun =
2587                                 periph->path->device->lun_id;
2588                 else
2589                         cdm->matches[j].result.periph_result.target_lun = -1;
2590
2591                 cdm->matches[j].result.periph_result.unit_number =
2592                         periph->unit_number;
2593                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2594                         periph->periph_name, DEV_IDLEN);
2595         }
2596
2597         return(1);
2598 }
2599
2600 static int
2601 xptperiphlistmatch(struct ccb_dev_match *cdm)
2602 {
2603         int ret;
2604
2605         cdm->num_matches = 0;
2606
2607         /*
2608          * At this point in the edt traversal function, we check the bus
2609          * list generation to make sure that no busses have been added or
2610          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2611          * For the peripheral driver list traversal function, however, we
2612          * don't have to worry about new peripheral driver types coming or
2613          * going; they're in a linker set, and therefore can't change
2614          * without a recompile.
2615          */
2616
2617         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2618          && (cdm->pos.cookie.pdrv != NULL))
2619                 ret = xptpdrvtraverse(
2620                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2621                                 xptplistpdrvfunc, cdm);
2622         else
2623                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2624
2625         /*
2626          * If we get back 0, that means that we had to stop before fully
2627          * traversing the peripheral driver tree.  It also means that one of
2628          * the subroutines has set the status field to the proper value.  If
2629          * we get back 1, we've fully traversed the EDT and copied out any
2630          * matching entries.
2631          */
2632         if (ret == 1)
2633                 cdm->status = CAM_DEV_MATCH_LAST;
2634
2635         return(ret);
2636 }
2637
2638 static int
2639 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2640 {
2641         struct cam_eb *bus, *next_bus;
2642         int retval;
2643
2644         retval = 1;
2645
2646         for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses));
2647              bus != NULL;
2648              bus = next_bus) {
2649                 next_bus = TAILQ_NEXT(bus, links);
2650
2651                 retval = tr_func(bus, arg);
2652                 if (retval == 0)
2653                         return(retval);
2654         }
2655
2656         return(retval);
2657 }
2658
2659 static int
2660 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2661                   xpt_targetfunc_t *tr_func, void *arg)
2662 {
2663         struct cam_et *target, *next_target;
2664         int retval;
2665
2666         retval = 1;
2667         for (target = (start_target ? start_target :
2668                        TAILQ_FIRST(&bus->et_entries));
2669              target != NULL; target = next_target) {
2670
2671                 next_target = TAILQ_NEXT(target, links);
2672
2673                 retval = tr_func(target, arg);
2674
2675                 if (retval == 0)
2676                         return(retval);
2677         }
2678
2679         return(retval);
2680 }
2681
2682 static int
2683 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2684                   xpt_devicefunc_t *tr_func, void *arg)
2685 {
2686         struct cam_ed *device, *next_device;
2687         int retval;
2688
2689         retval = 1;
2690         for (device = (start_device ? start_device :
2691                        TAILQ_FIRST(&target->ed_entries));
2692              device != NULL;
2693              device = next_device) {
2694
2695                 next_device = TAILQ_NEXT(device, links);
2696
2697                 retval = tr_func(device, arg);
2698
2699                 if (retval == 0)
2700                         return(retval);
2701         }
2702
2703         return(retval);
2704 }
2705
2706 static int
2707 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2708                   xpt_periphfunc_t *tr_func, void *arg)
2709 {
2710         struct cam_periph *periph, *next_periph;
2711         int retval;
2712
2713         retval = 1;
2714
2715         for (periph = (start_periph ? start_periph :
2716                        SLIST_FIRST(&device->periphs));
2717              periph != NULL;
2718              periph = next_periph) {
2719
2720                 next_periph = SLIST_NEXT(periph, periph_links);
2721
2722                 retval = tr_func(periph, arg);
2723                 if (retval == 0)
2724                         return(retval);
2725         }
2726
2727         return(retval);
2728 }
2729
2730 static int
2731 xptpdrvtraverse(struct periph_driver **start_pdrv,
2732                 xpt_pdrvfunc_t *tr_func, void *arg)
2733 {
2734         struct periph_driver **pdrv;
2735         int retval;
2736
2737         retval = 1;
2738
2739         /*
2740          * We don't traverse the peripheral driver list like we do the
2741          * other lists, because it is a linker set, and therefore cannot be
2742          * changed during runtime.  If the peripheral driver list is ever
2743          * re-done to be something other than a linker set (i.e. it can
2744          * change while the system is running), the list traversal should
2745          * be modified to work like the other traversal functions.
2746          */
2747         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2748              *pdrv != NULL; pdrv++) {
2749                 retval = tr_func(pdrv, arg);
2750
2751                 if (retval == 0)
2752                         return(retval);
2753         }
2754
2755         return(retval);
2756 }
2757
2758 static int
2759 xptpdperiphtraverse(struct periph_driver **pdrv,
2760                     struct cam_periph *start_periph,
2761                     xpt_periphfunc_t *tr_func, void *arg)
2762 {
2763         struct cam_periph *periph, *next_periph;
2764         int retval;
2765
2766         retval = 1;
2767
2768         for (periph = (start_periph ? start_periph :
2769              TAILQ_FIRST(&(*pdrv)->units)); periph != NULL;
2770              periph = next_periph) {
2771
2772                 next_periph = TAILQ_NEXT(periph, unit_links);
2773
2774                 retval = tr_func(periph, arg);
2775                 if (retval == 0)
2776                         return(retval);
2777         }
2778         return(retval);
2779 }
2780
2781 static int
2782 xptdefbusfunc(struct cam_eb *bus, void *arg)
2783 {
2784         struct xpt_traverse_config *tr_config;
2785
2786         tr_config = (struct xpt_traverse_config *)arg;
2787
2788         if (tr_config->depth == XPT_DEPTH_BUS) {
2789                 xpt_busfunc_t *tr_func;
2790
2791                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2792
2793                 return(tr_func(bus, tr_config->tr_arg));
2794         } else
2795                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2796 }
2797
2798 static int
2799 xptdeftargetfunc(struct cam_et *target, void *arg)
2800 {
2801         struct xpt_traverse_config *tr_config;
2802
2803         tr_config = (struct xpt_traverse_config *)arg;
2804
2805         if (tr_config->depth == XPT_DEPTH_TARGET) {
2806                 xpt_targetfunc_t *tr_func;
2807
2808                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2809
2810                 return(tr_func(target, tr_config->tr_arg));
2811         } else
2812                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2813 }
2814
2815 static int
2816 xptdefdevicefunc(struct cam_ed *device, void *arg)
2817 {
2818         struct xpt_traverse_config *tr_config;
2819
2820         tr_config = (struct xpt_traverse_config *)arg;
2821
2822         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2823                 xpt_devicefunc_t *tr_func;
2824
2825                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2826
2827                 return(tr_func(device, tr_config->tr_arg));
2828         } else
2829                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2830 }
2831
2832 static int
2833 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2834 {
2835         struct xpt_traverse_config *tr_config;
2836         xpt_periphfunc_t *tr_func;
2837
2838         tr_config = (struct xpt_traverse_config *)arg;
2839
2840         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2841
2842         /*
2843          * Unlike the other default functions, we don't check for depth
2844          * here.  The peripheral driver level is the last level in the EDT,
2845          * so if we're here, we should execute the function in question.
2846          */
2847         return(tr_func(periph, tr_config->tr_arg));
2848 }
2849
2850 /*
2851  * Execute the given function for every bus in the EDT.
2852  */
2853 static int
2854 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2855 {
2856         struct xpt_traverse_config tr_config;
2857
2858         tr_config.depth = XPT_DEPTH_BUS;
2859         tr_config.tr_func = tr_func;
2860         tr_config.tr_arg = arg;
2861
2862         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2863 }
2864
2865 #ifdef notusedyet
2866 /*
2867  * Execute the given function for every target in the EDT.
2868  */
2869 static int
2870 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg)
2871 {
2872         struct xpt_traverse_config tr_config;
2873
2874         tr_config.depth = XPT_DEPTH_TARGET;
2875         tr_config.tr_func = tr_func;
2876         tr_config.tr_arg = arg;
2877
2878         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2879 }
2880 #endif /* notusedyet */
2881
2882 /*
2883  * Execute the given function for every device in the EDT.
2884  */
2885 static int
2886 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2887 {
2888         struct xpt_traverse_config tr_config;
2889
2890         tr_config.depth = XPT_DEPTH_DEVICE;
2891         tr_config.tr_func = tr_func;
2892         tr_config.tr_arg = arg;
2893
2894         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2895 }
2896
2897 #ifdef notusedyet
2898 /*
2899  * Execute the given function for every peripheral in the EDT.
2900  */
2901 static int
2902 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg)
2903 {
2904         struct xpt_traverse_config tr_config;
2905
2906         tr_config.depth = XPT_DEPTH_PERIPH;
2907         tr_config.tr_func = tr_func;
2908         tr_config.tr_arg = arg;
2909
2910         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2911 }
2912 #endif /* notusedyet */
2913
2914 static int
2915 xptsetasyncfunc(struct cam_ed *device, void *arg)
2916 {
2917         struct cam_path path;
2918         struct ccb_getdev cgd;
2919         struct async_node *cur_entry;
2920
2921         cur_entry = (struct async_node *)arg;
2922
2923         /*
2924          * Don't report unconfigured devices (Wildcard devs,
2925          * devices only for target mode, device instances
2926          * that have been invalidated but are waiting for
2927          * their last reference count to be released).
2928          */
2929         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2930                 return (1);
2931
2932         xpt_compile_path(&path,
2933                          NULL,
2934                          device->target->bus->path_id,
2935                          device->target->target_id,
2936                          device->lun_id);
2937         xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1);
2938         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2939         xpt_action((union ccb *)&cgd);
2940         cur_entry->callback(cur_entry->callback_arg,
2941                             AC_FOUND_DEVICE,
2942                             &path, &cgd);
2943         xpt_release_path(&path);
2944
2945         return(1);
2946 }
2947
2948 static int
2949 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2950 {
2951         struct cam_path path;
2952         struct ccb_pathinq cpi;
2953         struct async_node *cur_entry;
2954
2955         cur_entry = (struct async_node *)arg;
2956
2957         xpt_compile_path(&path, /*periph*/NULL,
2958                          bus->sim->path_id,
2959                          CAM_TARGET_WILDCARD,
2960                          CAM_LUN_WILDCARD);
2961         xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
2962         cpi.ccb_h.func_code = XPT_PATH_INQ;
2963         xpt_action((union ccb *)&cpi);
2964         cur_entry->callback(cur_entry->callback_arg,
2965                             AC_PATH_REGISTERED,
2966                             &path, &cpi);
2967         xpt_release_path(&path);
2968
2969         return(1);
2970 }
2971
2972 void
2973 xpt_action(union ccb *start_ccb)
2974 {
2975         int iopl;
2976
2977         GIANT_REQUIRED;
2978
2979         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2980
2981         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2982
2983         iopl = splsoftcam();
2984         switch (start_ccb->ccb_h.func_code) {
2985         case XPT_SCSI_IO:
2986         {
2987 #ifdef CAM_NEW_TRAN_CODE
2988                 struct cam_ed *device;
2989 #endif /* CAM_NEW_TRAN_CODE */
2990 #ifdef CAMDEBUG
2991                 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
2992                 struct cam_path *path;
2993
2994                 path = start_ccb->ccb_h.path;
2995 #endif
2996
2997                 /*
2998                  * For the sake of compatibility with SCSI-1
2999                  * devices that may not understand the identify
3000                  * message, we include lun information in the
3001                  * second byte of all commands.  SCSI-1 specifies
3002                  * that luns are a 3 bit value and reserves only 3
3003                  * bits for lun information in the CDB.  Later
3004                  * revisions of the SCSI spec allow for more than 8
3005                  * luns, but have deprecated lun information in the
3006                  * CDB.  So, if the lun won't fit, we must omit.
3007                  *
3008                  * Also be aware that during initial probing for devices,
3009                  * the inquiry information is unknown but initialized to 0.
3010                  * This means that this code will be exercised while probing
3011                  * devices with an ANSI revision greater than 2.
3012                  */
3013 #ifdef CAM_NEW_TRAN_CODE
3014                 device = start_ccb->ccb_h.path->device;
3015                 if (device->protocol_version <= SCSI_REV_2
3016 #else /* CAM_NEW_TRAN_CODE */
3017                 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2
3018 #endif /* CAM_NEW_TRAN_CODE */
3019                  && start_ccb->ccb_h.target_lun < 8
3020                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
3021
3022                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
3023                             start_ccb->ccb_h.target_lun << 5;
3024                 }
3025                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
3026                 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n",
3027                           scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0],
3028                                        &path->device->inq_data),
3029                           scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes,
3030                                           cdb_str, sizeof(cdb_str))));
3031         }
3032         /* FALLTHROUGH */
3033         case XPT_TARGET_IO:
3034         case XPT_CONT_TARGET_IO:
3035                 start_ccb->csio.sense_resid = 0;
3036                 start_ccb->csio.resid = 0;
3037                 /* FALLTHROUGH */
3038         case XPT_RESET_DEV:
3039         case XPT_ENG_EXEC:
3040         {
3041                 struct cam_path *path;
3042                 int s;
3043                 int runq;
3044
3045                 path = start_ccb->ccb_h.path;
3046                 s = splsoftcam();
3047
3048                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
3049                 if (path->device->qfrozen_cnt == 0)
3050                         runq = xpt_schedule_dev_sendq(path->bus, path->device);
3051                 else
3052                         runq = 0;
3053                 splx(s);
3054                 if (runq != 0)
3055                         xpt_run_dev_sendq(path->bus);
3056                 break;
3057         }
3058         case XPT_SET_TRAN_SETTINGS:
3059         {
3060                 xpt_set_transfer_settings(&start_ccb->cts,
3061                                           start_ccb->ccb_h.path->device,
3062                                           /*async_update*/FALSE);
3063                 break;
3064         }
3065         case XPT_CALC_GEOMETRY:
3066         {
3067                 struct cam_sim *sim;
3068
3069                 /* Filter out garbage */
3070                 if (start_ccb->ccg.block_size == 0
3071                  || start_ccb->ccg.volume_size == 0) {
3072                         start_ccb->ccg.cylinders = 0;
3073                         start_ccb->ccg.heads = 0;
3074                         start_ccb->ccg.secs_per_track = 0;
3075                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3076                         break;
3077                 }
3078 #ifdef PC98
3079                 /*
3080                  * In a PC-98 system, geometry translation depens on
3081                  * the "real" device geometry obtained from mode page 4.
3082                  * SCSI geometry translation is performed in the
3083                  * initialization routine of the SCSI BIOS and the result
3084                  * stored in host memory.  If the translation is available
3085                  * in host memory, use it.  If not, rely on the default
3086                  * translation the device driver performs.
3087                  */
3088                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
3089                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3090                         break;
3091                 }
3092 #endif
3093                 sim = start_ccb->ccb_h.path->bus->sim;
3094                 (*(sim->sim_action))(sim, start_ccb);
3095                 break;
3096         }
3097         case XPT_ABORT:
3098         {
3099                 union ccb* abort_ccb;
3100                 int s;
3101
3102                 abort_ccb = start_ccb->cab.abort_ccb;
3103                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
3104
3105                         if (abort_ccb->ccb_h.pinfo.index >= 0) {
3106                                 struct cam_ccbq *ccbq;
3107
3108                                 ccbq = &abort_ccb->ccb_h.path->device->ccbq;
3109                                 cam_ccbq_remove_ccb(ccbq, abort_ccb);
3110                                 abort_ccb->ccb_h.status =
3111                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
3112                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
3113                                 s = splcam();
3114                                 xpt_done(abort_ccb);
3115                                 splx(s);
3116                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3117                                 break;
3118                         }
3119                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
3120                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
3121                                 /*
3122                                  * We've caught this ccb en route to
3123                                  * the SIM.  Flag it for abort and the
3124                                  * SIM will do so just before starting
3125                                  * real work on the CCB.
3126                                  */
3127                                 abort_ccb->ccb_h.status =
3128                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
3129                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
3130                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3131                                 break;
3132                         }
3133                 }
3134                 if (XPT_FC_IS_QUEUED(abort_ccb)
3135                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
3136                         /*
3137                          * It's already completed but waiting
3138                          * for our SWI to get to it.
3139                          */
3140                         start_ccb->ccb_h.status = CAM_UA_ABORT;
3141                         break;
3142                 }
3143                 /*
3144                  * If we weren't able to take care of the abort request
3145                  * in the XPT, pass the request down to the SIM for processing.
3146                  */
3147         }
3148         /* FALLTHROUGH */
3149         case XPT_ACCEPT_TARGET_IO:
3150         case XPT_EN_LUN:
3151         case XPT_IMMED_NOTIFY:
3152         case XPT_NOTIFY_ACK:
3153         case XPT_GET_TRAN_SETTINGS:
3154         case XPT_RESET_BUS:
3155         {
3156                 struct cam_sim *sim;
3157
3158                 sim = start_ccb->ccb_h.path->bus->sim;
3159                 (*(sim->sim_action))(sim, start_ccb);
3160                 break;
3161         }
3162         case XPT_PATH_INQ:
3163         {
3164                 struct cam_sim *sim;
3165
3166                 sim = start_ccb->ccb_h.path->bus->sim;
3167                 (*(sim->sim_action))(sim, start_ccb);
3168                 break;
3169         }
3170         case XPT_PATH_STATS:
3171                 start_ccb->cpis.last_reset =
3172                         start_ccb->ccb_h.path->bus->last_reset;
3173                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3174                 break;
3175         case XPT_GDEV_TYPE:
3176         {
3177                 struct cam_ed *dev;
3178                 int s;
3179
3180                 dev = start_ccb->ccb_h.path->device;
3181                 s = splcam();
3182                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
3183                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
3184                 } else {
3185                         struct ccb_getdev *cgd;
3186                         struct cam_eb *bus;
3187                         struct cam_et *tar;
3188
3189                         cgd = &start_ccb->cgd;
3190                         bus = cgd->ccb_h.path->bus;
3191                         tar = cgd->ccb_h.path->target;
3192                         cgd->inq_data = dev->inq_data;
3193                         cgd->ccb_h.status = CAM_REQ_CMP;
3194                         cgd->serial_num_len = dev->serial_num_len;
3195                         if ((dev->serial_num_len > 0)
3196                          && (dev->serial_num != NULL))
3197                                 bcopy(dev->serial_num, cgd->serial_num,
3198                                       dev->serial_num_len);
3199                 }
3200                 splx(s);
3201                 break;
3202         }
3203         case XPT_GDEV_STATS:
3204         {
3205                 struct cam_ed *dev;
3206                 int s;
3207
3208                 dev = start_ccb->ccb_h.path->device;
3209                 s = splcam();
3210                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
3211                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
3212                 } else {
3213                         struct ccb_getdevstats *cgds;
3214                         struct cam_eb *bus;
3215                         struct cam_et *tar;
3216
3217                         cgds = &start_ccb->cgds;
3218                         bus = cgds->ccb_h.path->bus;
3219                         tar = cgds->ccb_h.path->target;
3220                         cgds->dev_openings = dev->ccbq.dev_openings;
3221                         cgds->dev_active = dev->ccbq.dev_active;
3222                         cgds->devq_openings = dev->ccbq.devq_openings;
3223                         cgds->devq_queued = dev->ccbq.queue.entries;
3224                         cgds->held = dev->ccbq.held;
3225                         cgds->last_reset = tar->last_reset;
3226                         cgds->maxtags = dev->quirk->maxtags;
3227                         cgds->mintags = dev->quirk->mintags;
3228                         if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
3229                                 cgds->last_reset = bus->last_reset;
3230                         cgds->ccb_h.status = CAM_REQ_CMP;
3231                 }
3232                 splx(s);
3233                 break;
3234         }
3235         case XPT_GDEVLIST:
3236         {
3237                 struct cam_periph       *nperiph;
3238                 struct periph_list      *periph_head;
3239                 struct ccb_getdevlist   *cgdl;
3240                 u_int                   i;
3241                 int                     s;
3242                 struct cam_ed           *device;
3243                 int                     found;
3244
3245
3246                 found = 0;
3247
3248                 /*
3249                  * Don't want anyone mucking with our data.
3250                  */
3251                 s = splcam();
3252                 device = start_ccb->ccb_h.path->device;
3253                 periph_head = &device->periphs;
3254                 cgdl = &start_ccb->cgdl;
3255
3256                 /*
3257                  * Check and see if the list has changed since the user
3258                  * last requested a list member.  If so, tell them that the
3259                  * list has changed, and therefore they need to start over
3260                  * from the beginning.
3261                  */
3262                 if ((cgdl->index != 0) &&
3263                     (cgdl->generation != device->generation)) {
3264                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
3265                         splx(s);
3266                         break;
3267                 }
3268
3269                 /*
3270                  * Traverse the list of peripherals and attempt to find
3271                  * the requested peripheral.
3272                  */
3273                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
3274                      (nperiph != NULL) && (i <= cgdl->index);
3275                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
3276                         if (i == cgdl->index) {
3277                                 strncpy(cgdl->periph_name,
3278                                         nperiph->periph_name,
3279                                         DEV_IDLEN);
3280                                 cgdl->unit_number = nperiph->unit_number;
3281                                 found = 1;
3282                         }
3283                 }
3284                 if (found == 0) {
3285                         cgdl->status = CAM_GDEVLIST_ERROR;
3286                         splx(s);
3287                         break;
3288                 }
3289
3290                 if (nperiph == NULL)
3291                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
3292                 else
3293                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
3294
3295                 cgdl->index++;
3296                 cgdl->generation = device->generation;
3297
3298                 splx(s);
3299                 cgdl->ccb_h.status = CAM_REQ_CMP;
3300                 break;
3301         }
3302         case XPT_DEV_MATCH:
3303         {
3304                 int s;
3305                 dev_pos_type position_type;
3306                 struct ccb_dev_match *cdm;
3307
3308                 cdm = &start_ccb->cdm;
3309
3310                 /*
3311                  * Prevent EDT changes while we traverse it.
3312                  */
3313                 s = splcam();
3314                 /*
3315                  * There are two ways of getting at information in the EDT.
3316                  * The first way is via the primary EDT tree.  It starts
3317                  * with a list of busses, then a list of targets on a bus,
3318                  * then devices/luns on a target, and then peripherals on a
3319                  * device/lun.  The "other" way is by the peripheral driver
3320                  * lists.  The peripheral driver lists are organized by
3321                  * peripheral driver.  (obviously)  So it makes sense to
3322                  * use the peripheral driver list if the user is looking
3323                  * for something like "da1", or all "da" devices.  If the
3324                  * user is looking for something on a particular bus/target
3325                  * or lun, it's generally better to go through the EDT tree.
3326                  */
3327
3328                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
3329                         position_type = cdm->pos.position_type;
3330                 else {
3331                         u_int i;
3332
3333                         position_type = CAM_DEV_POS_NONE;
3334
3335                         for (i = 0; i < cdm->num_patterns; i++) {
3336                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
3337                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
3338                                         position_type = CAM_DEV_POS_EDT;
3339                                         break;
3340                                 }
3341                         }
3342
3343                         if (cdm->num_patterns == 0)
3344                                 position_type = CAM_DEV_POS_EDT;
3345                         else if (position_type == CAM_DEV_POS_NONE)
3346                                 position_type = CAM_DEV_POS_PDRV;
3347                 }
3348
3349                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
3350                 case CAM_DEV_POS_EDT:
3351                         xptedtmatch(cdm);
3352                         break;
3353                 case CAM_DEV_POS_PDRV:
3354                         xptperiphlistmatch(cdm);
3355                         break;
3356                 default:
3357                         cdm->status = CAM_DEV_MATCH_ERROR;
3358                         break;
3359                 }
3360
3361                 splx(s);
3362
3363                 if (cdm->status == CAM_DEV_MATCH_ERROR)
3364                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
3365                 else
3366                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3367
3368                 break;
3369         }
3370         case XPT_SASYNC_CB:
3371         {
3372                 struct ccb_setasync *csa;
3373                 struct async_node *cur_entry;
3374                 struct async_list *async_head;
3375                 u_int32_t added;
3376                 int s;
3377
3378                 csa = &start_ccb->csa;
3379                 added = csa->event_enable;
3380                 async_head = &csa->ccb_h.path->device->asyncs;
3381
3382                 /*
3383                  * If there is already an entry for us, simply
3384                  * update it.
3385                  */
3386                 s = splcam();
3387                 cur_entry = SLIST_FIRST(async_head);
3388                 while (cur_entry != NULL) {
3389                         if ((cur_entry->callback_arg == csa->callback_arg)
3390                          && (cur_entry->callback == csa->callback))
3391                                 break;
3392                         cur_entry = SLIST_NEXT(cur_entry, links);
3393                 }
3394
3395                 if (cur_entry != NULL) {
3396                         /*
3397                          * If the request has no flags set,
3398                          * remove the entry.
3399                          */
3400                         added &= ~cur_entry->event_enable;
3401                         if (csa->event_enable == 0) {
3402                                 SLIST_REMOVE(async_head, cur_entry,
3403                                              async_node, links);
3404                                 csa->ccb_h.path->device->refcount--;
3405                                 free(cur_entry, M_CAMXPT);
3406                         } else {
3407                                 cur_entry->event_enable = csa->event_enable;
3408                         }
3409                 } else {
3410                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3411                                            M_NOWAIT);
3412                         if (cur_entry == NULL) {
3413                                 splx(s);
3414                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3415                                 break;
3416                         }
3417                         cur_entry->event_enable = csa->event_enable;
3418                         cur_entry->callback_arg = csa->callback_arg;
3419                         cur_entry->callback = csa->callback;
3420                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3421                         csa->ccb_h.path->device->refcount++;
3422                 }
3423
3424                 if ((added & AC_FOUND_DEVICE) != 0) {
3425                         /*
3426                          * Get this peripheral up to date with all
3427                          * the currently existing devices.
3428                          */
3429                         xpt_for_all_devices(xptsetasyncfunc, cur_entry);
3430                 }
3431                 if ((added & AC_PATH_REGISTERED) != 0) {
3432                         /*
3433                          * Get this peripheral up to date with all
3434                          * the currently existing busses.
3435                          */
3436                         xpt_for_all_busses(xptsetasyncbusfunc, cur_entry);
3437                 }
3438                 splx(s);
3439                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3440                 break;
3441         }
3442         case XPT_REL_SIMQ:
3443         {
3444                 struct ccb_relsim *crs;
3445                 struct cam_ed *dev;
3446                 int s;
3447
3448                 crs = &start_ccb->crs;
3449                 dev = crs->ccb_h.path->device;
3450                 if (dev == NULL) {
3451
3452                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3453                         break;
3454                 }
3455
3456                 s = splcam();
3457
3458                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3459
3460                         if ((dev->inq_data.flags & SID_CmdQue) != 0) {
3461
3462                                 /* Don't ever go below one opening */
3463                                 if (crs->openings > 0) {
3464                                         xpt_dev_ccbq_resize(crs->ccb_h.path,
3465                                                             crs->openings);
3466
3467                                         if (bootverbose) {
3468                                                 xpt_print_path(crs->ccb_h.path);
3469                                                 printf("tagged openings "
3470                                                        "now %d\n",
3471                                                        crs->openings);
3472                                         }
3473                                 }
3474                         }
3475                 }
3476
3477                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3478
3479                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3480
3481                                 /*
3482                                  * Just extend the old timeout and decrement
3483                                  * the freeze count so that a single timeout
3484                                  * is sufficient for releasing the queue.
3485                                  */
3486                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3487                                 untimeout(xpt_release_devq_timeout,
3488                                           dev, dev->c_handle);
3489                         } else {
3490
3491                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3492                         }
3493
3494                         dev->c_handle =
3495                                 timeout(xpt_release_devq_timeout,
3496                                         dev,
3497                                         (crs->release_timeout * hz) / 1000);
3498
3499                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3500
3501                 }
3502
3503                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3504
3505                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3506                                 /*
3507                                  * Decrement the freeze count so that a single
3508                                  * completion is still sufficient to unfreeze
3509                                  * the queue.
3510                                  */
3511                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3512                         } else {
3513
3514                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3515                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3516                         }
3517                 }
3518
3519                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3520
3521                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3522                          || (dev->ccbq.dev_active == 0)) {
3523
3524                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3525                         } else {
3526
3527                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3528                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3529                         }
3530                 }
3531                 splx(s);
3532
3533                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) {
3534
3535                         xpt_release_devq(crs->ccb_h.path, /*count*/1,
3536                                          /*run_queue*/TRUE);
3537                 }
3538                 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt;
3539                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3540                 break;
3541         }
3542         case XPT_SCAN_BUS:
3543                 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb);
3544                 break;
3545         case XPT_SCAN_LUN:
3546                 xpt_scan_lun(start_ccb->ccb_h.path->periph,
3547                              start_ccb->ccb_h.path, start_ccb->crcn.flags,
3548                              start_ccb);
3549                 break;
3550         case XPT_DEBUG: {
3551 #ifdef CAMDEBUG
3552                 int s;
3553
3554                 s = splcam();
3555 #ifdef CAM_DEBUG_DELAY
3556                 cam_debug_delay = CAM_DEBUG_DELAY;
3557 #endif
3558                 cam_dflags = start_ccb->cdbg.flags;
3559                 if (cam_dpath != NULL) {
3560                         xpt_free_path(cam_dpath);
3561                         cam_dpath = NULL;
3562                 }
3563
3564                 if (cam_dflags != CAM_DEBUG_NONE) {
3565                         if (xpt_create_path(&cam_dpath, xpt_periph,
3566                                             start_ccb->ccb_h.path_id,
3567                                             start_ccb->ccb_h.target_id,
3568                                             start_ccb->ccb_h.target_lun) !=
3569                                             CAM_REQ_CMP) {
3570                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3571                                 cam_dflags = CAM_DEBUG_NONE;
3572                         } else {
3573                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3574                                 xpt_print_path(cam_dpath);
3575                                 printf("debugging flags now %x\n", cam_dflags);
3576                         }
3577                 } else {
3578                         cam_dpath = NULL;
3579                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3580                 }
3581                 splx(s);
3582 #else /* !CAMDEBUG */
3583                 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3584 #endif /* CAMDEBUG */
3585                 break;
3586         }
3587         case XPT_NOOP:
3588                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3589                         xpt_freeze_devq(start_ccb->ccb_h.path, 1);
3590                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3591                 break;
3592         default:
3593         case XPT_SDEV_TYPE:
3594         case XPT_TERM_IO:
3595         case XPT_ENG_INQ:
3596                 /* XXX Implement */
3597                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3598                 break;
3599         }
3600         splx(iopl);
3601 }
3602
3603 void
3604 xpt_polled_action(union ccb *start_ccb)
3605 {
3606         int       s;
3607         u_int32_t timeout;
3608         struct    cam_sim *sim;
3609         struct    cam_devq *devq;
3610         struct    cam_ed *dev;
3611
3612         GIANT_REQUIRED;
3613
3614         timeout = start_ccb->ccb_h.timeout;
3615         sim = start_ccb->ccb_h.path->bus->sim;
3616         devq = sim->devq;
3617         dev = start_ccb->ccb_h.path->device;
3618
3619         s = splcam();
3620
3621         /*
3622          * Steal an opening so that no other queued requests
3623          * can get it before us while we simulate interrupts.
3624          */
3625         dev->ccbq.devq_openings--;
3626         dev->ccbq.dev_openings--;
3627
3628         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0)
3629            && (--timeout > 0)) {
3630                 DELAY(1000);
3631                 (*(sim->sim_poll))(sim);
3632                 camisr(&cam_bioq);
3633         }
3634
3635         dev->ccbq.devq_openings++;
3636         dev->ccbq.dev_openings++;
3637
3638         if (timeout != 0) {
3639                 xpt_action(start_ccb);
3640                 while(--timeout > 0) {
3641                         (*(sim->sim_poll))(sim);
3642                         camisr(&cam_bioq);
3643                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3644                             != CAM_REQ_INPROG)
3645                                 break;
3646                         DELAY(1000);
3647                 }
3648                 if (timeout == 0) {
3649                         /*
3650                          * XXX Is it worth adding a sim_timeout entry
3651                          * point so we can attempt recovery?  If
3652                          * this is only used for dumps, I don't think
3653                          * it is.
3654                          */
3655                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3656                 }
3657         } else {
3658                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3659         }
3660         splx(s);
3661 }
3662
3663 /*
3664  * Schedule a peripheral driver to receive a ccb when it's
3665  * target device has space for more transactions.
3666  */
3667 void
3668 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority)
3669 {
3670         struct cam_ed *device;
3671         int s;
3672         int runq;
3673
3674         GIANT_REQUIRED;
3675
3676         CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3677         device = perph->path->device;
3678         s = splsoftcam();
3679         if (periph_is_queued(perph)) {
3680                 /* Simply reorder based on new priority */
3681                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3682                           ("   change priority to %d\n", new_priority));
3683                 if (new_priority < perph->pinfo.priority) {
3684                         camq_change_priority(&device->drvq,
3685                                              perph->pinfo.index,
3686                                              new_priority);
3687                 }
3688                 runq = 0;
3689         } else {
3690                 /* New entry on the queue */
3691                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3692                           ("   added periph to queue\n"));
3693                 perph->pinfo.priority = new_priority;
3694                 perph->pinfo.generation = ++device->drvq.generation;
3695                 camq_insert(&device->drvq, &perph->pinfo);
3696                 runq = xpt_schedule_dev_allocq(perph->path->bus, device);
3697         }
3698         splx(s);
3699         if (runq != 0) {
3700                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3701                           ("   calling xpt_run_devq\n"));
3702                 xpt_run_dev_allocq(perph->path->bus);
3703         }
3704 }
3705
3706
3707 /*
3708  * Schedule a device to run on a given queue.
3709  * If the device was inserted as a new entry on the queue,
3710  * return 1 meaning the device queue should be run. If we
3711  * were already queued, implying someone else has already
3712  * started the queue, return 0 so the caller doesn't attempt
3713  * to run the queue.  Must be run at either splsoftcam
3714  * (or splcam since that encompases splsoftcam).
3715  */
3716 static int
3717 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3718                  u_int32_t new_priority)
3719 {
3720         int retval;
3721         u_int32_t old_priority;
3722
3723         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3724
3725         old_priority = pinfo->priority;
3726
3727         /*
3728          * Are we already queued?
3729          */
3730         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3731                 /* Simply reorder based on new priority */
3732                 if (new_priority < old_priority) {
3733                         camq_change_priority(queue, pinfo->index,
3734                                              new_priority);
3735                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3736                                         ("changed priority to %d\n",
3737                                          new_priority));
3738                 }
3739                 retval = 0;
3740         } else {
3741                 /* New entry on the queue */
3742                 if (new_priority < old_priority)
3743                         pinfo->priority = new_priority;
3744
3745                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3746                                 ("Inserting onto queue\n"));
3747                 pinfo->generation = ++queue->generation;
3748                 camq_insert(queue, pinfo);
3749                 retval = 1;
3750         }
3751         return (retval);
3752 }
3753
3754 static void
3755 xpt_run_dev_allocq(struct cam_eb *bus)
3756 {
3757         struct  cam_devq *devq;
3758         int     s;
3759
3760         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n"));
3761         devq = bus->sim->devq;
3762
3763         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3764                         ("   qfrozen_cnt == 0x%x, entries == %d, "
3765                          "openings == %d, active == %d\n",
3766                          devq->alloc_queue.qfrozen_cnt,
3767                          devq->alloc_queue.entries,
3768                          devq->alloc_openings,
3769                          devq->alloc_active));
3770
3771         s = splsoftcam();
3772         devq->alloc_queue.qfrozen_cnt++;
3773         while ((devq->alloc_queue.entries > 0)
3774             && (devq->alloc_openings > 0)
3775             && (devq->alloc_queue.qfrozen_cnt <= 1)) {
3776                 struct  cam_ed_qinfo *qinfo;
3777                 struct  cam_ed *device;
3778                 union   ccb *work_ccb;
3779                 struct  cam_periph *drv;
3780                 struct  camq *drvq;
3781
3782                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
3783                                                            CAMQ_HEAD);
3784                 device = qinfo->device;
3785
3786                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3787                                 ("running device %p\n", device));
3788
3789                 drvq = &device->drvq;
3790
3791 #ifdef CAMDEBUG
3792                 if (drvq->entries <= 0) {
3793                         panic("xpt_run_dev_allocq: "
3794                               "Device on queue without any work to do");
3795                 }
3796 #endif
3797                 if ((work_ccb = xpt_get_ccb(device)) != NULL) {
3798                         devq->alloc_openings--;
3799                         devq->alloc_active++;
3800                         drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD);
3801                         splx(s);
3802                         xpt_setup_ccb(&work_ccb->ccb_h, drv->path,
3803                                       drv->pinfo.priority);
3804                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3805                                         ("calling periph start\n"));
3806                         drv->periph_start(drv, work_ccb);
3807                 } else {
3808                         /*
3809                          * Malloc failure in alloc_ccb
3810                          */
3811                         /*
3812                          * XXX add us to a list to be run from free_ccb
3813                          * if we don't have any ccbs active on this
3814                          * device queue otherwise we may never get run
3815                          * again.
3816                          */
3817                         break;
3818                 }
3819
3820                 /* Raise IPL for possible insertion and test at top of loop */
3821                 s = splsoftcam();
3822
3823                 if (drvq->entries > 0) {
3824                         /* We have more work.  Attempt to reschedule */
3825                         xpt_schedule_dev_allocq(bus, device);
3826                 }
3827         }
3828         devq->alloc_queue.qfrozen_cnt--;
3829         splx(s);
3830 }
3831
3832 static void
3833 xpt_run_dev_sendq(struct cam_eb *bus)
3834 {
3835         struct  cam_devq *devq;
3836         int     s;
3837
3838         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n"));
3839
3840         devq = bus->sim->devq;
3841
3842         s = splcam();
3843         devq->send_queue.qfrozen_cnt++;
3844         splx(s);
3845         s = splsoftcam();
3846         while ((devq->send_queue.entries > 0)
3847             && (devq->send_openings > 0)) {
3848                 struct  cam_ed_qinfo *qinfo;
3849                 struct  cam_ed *device;
3850                 union ccb *work_ccb;
3851                 struct  cam_sim *sim;
3852                 int     ospl;
3853
3854                 ospl = splcam();
3855                 if (devq->send_queue.qfrozen_cnt > 1) {
3856                         splx(ospl);
3857                         break;
3858                 }
3859
3860                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
3861                                                            CAMQ_HEAD);
3862                 device = qinfo->device;
3863
3864                 /*
3865                  * If the device has been "frozen", don't attempt
3866                  * to run it.
3867                  */
3868                 if (device->qfrozen_cnt > 0) {
3869                         splx(ospl);
3870                         continue;
3871                 }
3872
3873                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3874                                 ("running device %p\n", device));
3875
3876                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3877                 if (work_ccb == NULL) {
3878                         printf("device on run queue with no ccbs???\n");
3879                         splx(ospl);
3880                         continue;
3881                 }
3882
3883                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3884
3885                         if (num_highpower <= 0) {
3886                                 /*
3887                                  * We got a high power command, but we
3888                                  * don't have any available slots.  Freeze
3889                                  * the device queue until we have a slot
3890                                  * available.
3891                                  */
3892                                 device->qfrozen_cnt++;
3893                                 STAILQ_INSERT_TAIL(&highpowerq,
3894                                                    &work_ccb->ccb_h,
3895                                                    xpt_links.stqe);
3896
3897                                 splx(ospl);
3898                                 continue;
3899                         } else {
3900                                 /*
3901                                  * Consume a high power slot while
3902                                  * this ccb runs.
3903                                  */
3904                                 num_highpower--;
3905                         }
3906                 }
3907                 devq->active_dev = device;
3908                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3909
3910                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3911                 splx(ospl);
3912
3913                 devq->send_openings--;
3914                 devq->send_active++;
3915
3916                 if (device->ccbq.queue.entries > 0)
3917                         xpt_schedule_dev_sendq(bus, device);
3918
3919                 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){
3920                         /*
3921                          * The client wants to freeze the queue
3922                          * after this CCB is sent.
3923                          */
3924                         ospl = splcam();
3925                         device->qfrozen_cnt++;
3926                         splx(ospl);
3927                 }
3928
3929                 splx(s);
3930
3931                 /* In Target mode, the peripheral driver knows best... */
3932                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3933                         if ((device->inq_flags & SID_CmdQue) != 0
3934                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3935                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3936                         else
3937                                 /*
3938                                  * Clear this in case of a retried CCB that
3939                                  * failed due to a rejected tag.
3940                                  */
3941                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3942                 }
3943
3944                 /*
3945                  * Device queues can be shared among multiple sim instances
3946                  * that reside on different busses.  Use the SIM in the queue
3947                  * CCB's path, rather than the one in the bus that was passed
3948                  * into this function.
3949                  */
3950                 sim = work_ccb->ccb_h.path->bus->sim;
3951                 (*(sim->sim_action))(sim, work_ccb);
3952
3953                 ospl = splcam();
3954                 devq->active_dev = NULL;
3955                 splx(ospl);
3956                 /* Raise IPL for possible insertion and test at top of loop */
3957                 s = splsoftcam();
3958         }
3959         splx(s);
3960         s = splcam();
3961         devq->send_queue.qfrozen_cnt--;
3962         splx(s);
3963 }
3964
3965 /*
3966  * This function merges stuff from the slave ccb into the master ccb, while
3967  * keeping important fields in the master ccb constant.
3968  */
3969 void
3970 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3971 {
3972         GIANT_REQUIRED;
3973
3974         /*
3975          * Pull fields that are valid for peripheral drivers to set
3976          * into the master CCB along with the CCB "payload".
3977          */
3978         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3979         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3980         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3981         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3982         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3983               sizeof(union ccb) - sizeof(struct ccb_hdr));
3984 }
3985
3986 void
3987 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3988 {
3989         GIANT_REQUIRED;
3990
3991         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3992         ccb_h->pinfo.priority = priority;
3993         ccb_h->path = path;
3994         ccb_h->path_id = path->bus->path_id;
3995         if (path->target)
3996                 ccb_h->target_id = path->target->target_id;
3997         else
3998                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3999         if (path->device) {
4000                 ccb_h->target_lun = path->device->lun_id;
4001                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
4002         } else {
4003                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
4004         }
4005         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
4006         ccb_h->flags = 0;
4007 }
4008
4009 /* Path manipulation functions */
4010 cam_status
4011 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
4012                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
4013 {
4014         struct     cam_path *path;
4015         cam_status status;
4016
4017         GIANT_REQUIRED;
4018
4019         path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_NOWAIT);
4020
4021         if (path == NULL) {
4022                 status = CAM_RESRC_UNAVAIL;
4023                 return(status);
4024         }
4025         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
4026         if (status != CAM_REQ_CMP) {
4027                 free(path, M_CAMXPT);
4028                 path = NULL;
4029         }
4030         *new_path_ptr = path;
4031         return (status);
4032 }
4033
4034 static cam_status
4035 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
4036                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
4037 {
4038         struct       cam_eb *bus;
4039         struct       cam_et *target;
4040         struct       cam_ed *device;
4041         cam_status   status;
4042         int          s;
4043
4044         status = CAM_REQ_CMP;   /* Completed without error */
4045         target = NULL;          /* Wildcarded */
4046         device = NULL;          /* Wildcarded */
4047
4048         /*
4049          * We will potentially modify the EDT, so block interrupts
4050          * that may attempt to create cam paths.
4051          */
4052         s = splcam();
4053         bus = xpt_find_bus(path_id);
4054         if (bus == NULL) {
4055                 status = CAM_PATH_INVALID;
4056         } else {
4057                 target = xpt_find_target(bus, target_id);
4058                 if (target == NULL) {
4059                         /* Create one */
4060                         struct cam_et *new_target;
4061
4062                         new_target = xpt_alloc_target(bus, target_id);
4063                         if (new_target == NULL) {
4064                                 status = CAM_RESRC_UNAVAIL;
4065                         } else {
4066                                 target = new_target;
4067                         }
4068                 }
4069                 if (target != NULL) {
4070                         device = xpt_find_device(target, lun_id);
4071                         if (device == NULL) {
4072                                 /* Create one */
4073                                 struct cam_ed *new_device;
4074
4075                                 new_device = xpt_alloc_device(bus,
4076                                                               target,
4077                                                               lun_id);
4078                                 if (new_device == NULL) {
4079                                         status = CAM_RESRC_UNAVAIL;
4080                                 } else {
4081                                         device = new_device;
4082                                 }
4083                         }
4084                 }
4085         }
4086         splx(s);
4087
4088         /*
4089          * Only touch the user's data if we are successful.
4090          */
4091         if (status == CAM_REQ_CMP) {
4092                 new_path->periph = perph;
4093                 new_path->bus = bus;
4094                 new_path->target = target;
4095                 new_path->device = device;
4096                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
4097         } else {
4098                 if (device != NULL)
4099                         xpt_release_device(bus, target, device);
4100                 if (target != NULL)
4101                         xpt_release_target(bus, target);
4102                 if (bus != NULL)
4103                         xpt_release_bus(bus);
4104         }
4105         return (status);
4106 }
4107
4108 static void
4109 xpt_release_path(struct cam_path *path)
4110 {
4111         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
4112         if (path->device != NULL) {
4113                 xpt_release_device(path->bus, path->target, path->device);
4114                 path->device = NULL;
4115         }
4116         if (path->target != NULL) {
4117                 xpt_release_target(path->bus, path->target);
4118                 path->target = NULL;
4119         }
4120         if (path->bus != NULL) {
4121                 xpt_release_bus(path->bus);
4122                 path->bus = NULL;
4123         }
4124 }
4125
4126 void
4127 xpt_free_path(struct cam_path *path)
4128 {
4129         GIANT_REQUIRED;
4130
4131         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
4132         xpt_release_path(path);
4133         free(path, M_CAMXPT);
4134 }
4135
4136
4137 /*
4138  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
4139  * in path1, 2 for match with wildcards in path2.
4140  */
4141 int
4142 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
4143 {
4144         GIANT_REQUIRED;
4145
4146         int retval = 0;
4147
4148         if (path1->bus != path2->bus) {
4149                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
4150                         retval = 1;
4151                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
4152                         retval = 2;
4153                 else
4154                         return (-1);
4155         }
4156         if (path1->target != path2->target) {
4157                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
4158                         if (retval == 0)
4159                                 retval = 1;
4160                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
4161                         retval = 2;
4162                 else
4163                         return (-1);
4164         }
4165         if (path1->device != path2->device) {
4166                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
4167                         if (retval == 0)
4168                                 retval = 1;
4169                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
4170                         retval = 2;
4171                 else
4172                         return (-1);
4173         }
4174         return (retval);
4175 }
4176
4177 void
4178 xpt_print_path(struct cam_path *path)
4179 {
4180         GIANT_REQUIRED;
4181
4182         if (path == NULL)
4183                 printf("(nopath): ");
4184         else {
4185                 if (path->periph != NULL)
4186                         printf("(%s%d:", path->periph->periph_name,
4187                                path->periph->unit_number);
4188                 else
4189                         printf("(noperiph:");
4190
4191                 if (path->bus != NULL)
4192                         printf("%s%d:%d:", path->bus->sim->sim_name,
4193                                path->bus->sim->unit_number,
4194                                path->bus->sim->bus_id);
4195                 else
4196                         printf("nobus:");
4197
4198                 if (path->target != NULL)
4199                         printf("%d:", path->target->target_id);
4200                 else
4201                         printf("X:");
4202
4203                 if (path->device != NULL)
4204                         printf("%d): ", path->device->lun_id);
4205                 else
4206                         printf("X): ");
4207         }
4208 }
4209
4210 int
4211 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
4212 {
4213         struct sbuf sb;
4214
4215         GIANT_REQUIRED;
4216
4217         sbuf_new(&sb, str, str_len, 0);
4218
4219         if (path == NULL)
4220                 sbuf_printf(&sb, "(nopath): ");
4221         else {
4222                 if (path->periph != NULL)
4223                         sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
4224                                     path->periph->unit_number);
4225                 else
4226                         sbuf_printf(&sb, "(noperiph:");
4227
4228                 if (path->bus != NULL)
4229                         sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
4230                                     path->bus->sim->unit_number,
4231                                     path->bus->sim->bus_id);
4232                 else
4233                         sbuf_printf(&sb, "nobus:");
4234
4235                 if (path->target != NULL)
4236                         sbuf_printf(&sb, "%d:", path->target->target_id);
4237                 else
4238                         sbuf_printf(&sb, "X:");
4239
4240                 if (path->device != NULL)
4241                         sbuf_printf(&sb, "%d): ", path->device->lun_id);
4242                 else
4243                         sbuf_printf(&sb, "X): ");
4244         }
4245         sbuf_finish(&sb);
4246
4247         return(sbuf_len(&sb));
4248 }
4249
4250 path_id_t
4251 xpt_path_path_id(struct cam_path *path)
4252 {
4253         GIANT_REQUIRED;
4254
4255         return(path->bus->path_id);
4256 }
4257
4258 target_id_t
4259 xpt_path_target_id(struct cam_path *path)
4260 {
4261         GIANT_REQUIRED;
4262
4263         if (path->target != NULL)
4264                 return (path->target->target_id);
4265         else
4266                 return (CAM_TARGET_WILDCARD);
4267 }
4268
4269 lun_id_t
4270 xpt_path_lun_id(struct cam_path *path)
4271 {
4272         GIANT_REQUIRED;
4273
4274         if (path->device != NULL)
4275                 return (path->device->lun_id);
4276         else
4277                 return (CAM_LUN_WILDCARD);
4278 }
4279
4280 struct cam_sim *
4281 xpt_path_sim(struct cam_path *path)
4282 {
4283         GIANT_REQUIRED;
4284
4285         return (path->bus->sim);
4286 }
4287
4288 struct cam_periph*
4289 xpt_path_periph(struct cam_path *path)
4290 {
4291         GIANT_REQUIRED;
4292
4293         return (path->periph);
4294 }
4295
4296 /*
4297  * Release a CAM control block for the caller.  Remit the cost of the structure
4298  * to the device referenced by the path.  If the this device had no 'credits'
4299  * and peripheral drivers have registered async callbacks for this notification
4300  * call them now.
4301  */
4302 void
4303 xpt_release_ccb(union ccb *free_ccb)
4304 {
4305         int      s;
4306         struct   cam_path *path;
4307         struct   cam_ed *device;
4308         struct   cam_eb *bus;
4309
4310         GIANT_REQUIRED;
4311
4312         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
4313         path = free_ccb->ccb_h.path;
4314         device = path->device;
4315         bus = path->bus;
4316         s = splsoftcam();
4317         cam_ccbq_release_opening(&device->ccbq);
4318         if (xpt_ccb_count > xpt_max_ccbs) {
4319                 xpt_free_ccb(free_ccb);
4320                 xpt_ccb_count--;
4321         } else {
4322                 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle);
4323         }
4324         bus->sim->devq->alloc_openings++;
4325         bus->sim->devq->alloc_active--;
4326         /* XXX Turn this into an inline function - xpt_run_device?? */
4327         if ((device_is_alloc_queued(device) == 0)
4328          && (device->drvq.entries > 0)) {
4329                 xpt_schedule_dev_allocq(bus, device);
4330         }
4331         splx(s);
4332         if (dev_allocq_is_runnable(bus->sim->devq))
4333                 xpt_run_dev_allocq(bus);
4334 }
4335
4336 /* Functions accessed by SIM drivers */
4337
4338 /*
4339  * A sim structure, listing the SIM entry points and instance
4340  * identification info is passed to xpt_bus_register to hook the SIM
4341  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
4342  * for this new bus and places it in the array of busses and assigns
4343  * it a path_id.  The path_id may be influenced by "hard wiring"
4344  * information specified by the user.  Once interrupt services are
4345  * availible, the bus will be probed.
4346  */
4347 int32_t
4348 xpt_bus_register(struct cam_sim *sim, u_int32_t bus)
4349 {
4350         struct cam_eb *new_bus;
4351         struct cam_eb *old_bus;
4352         struct ccb_pathinq cpi;
4353         int s;
4354
4355         GIANT_REQUIRED;
4356
4357         sim->bus_id = bus;
4358         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4359                                           M_CAMXPT, M_NOWAIT);
4360         if (new_bus == NULL) {
4361                 /* Couldn't satisfy request */
4362                 return (CAM_RESRC_UNAVAIL);
4363         }
4364
4365         if (strcmp(sim->sim_name, "xpt") != 0) {
4366
4367                 sim->path_id =
4368                     xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4369         }
4370
4371         TAILQ_INIT(&new_bus->et_entries);
4372         new_bus->path_id = sim->path_id;
4373         new_bus->sim = sim;
4374         timevalclear(&new_bus->last_reset);
4375         new_bus->flags = 0;
4376         new_bus->refcount = 1;  /* Held until a bus_deregister event */
4377         new_bus->generation = 0;
4378         s = splcam();
4379         old_bus = TAILQ_FIRST(&xpt_busses);
4380         while (old_bus != NULL
4381             && old_bus->path_id < new_bus->path_id)
4382                 old_bus = TAILQ_NEXT(old_bus, links);
4383         if (old_bus != NULL)
4384                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4385         else
4386                 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links);
4387         bus_generation++;
4388         splx(s);
4389
4390         /* Notify interested parties */
4391         if (sim->path_id != CAM_XPT_PATH_ID) {
4392                 struct cam_path path;
4393
4394                 xpt_compile_path(&path, /*periph*/NULL, sim->path_id,
4395                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4396                 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
4397                 cpi.ccb_h.func_code = XPT_PATH_INQ;
4398                 xpt_action((union ccb *)&cpi);
4399                 xpt_async(AC_PATH_REGISTERED, &path, &cpi);
4400                 xpt_release_path(&path);
4401         }
4402         return (CAM_SUCCESS);
4403 }
4404
4405 int32_t
4406 xpt_bus_deregister(path_id_t pathid)
4407 {
4408         struct cam_path bus_path;
4409         cam_status status;
4410
4411         GIANT_REQUIRED;
4412
4413         status = xpt_compile_path(&bus_path, NULL, pathid,
4414                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4415         if (status != CAM_REQ_CMP)
4416                 return (status);
4417
4418         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4419         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4420
4421         /* Release the reference count held while registered. */
4422         xpt_release_bus(bus_path.bus);
4423         xpt_release_path(&bus_path);
4424
4425         return (CAM_REQ_CMP);
4426 }
4427
4428 static path_id_t
4429 xptnextfreepathid(void)
4430 {
4431         struct cam_eb *bus;
4432         path_id_t pathid;
4433         const char *strval;
4434
4435         pathid = 0;
4436         bus = TAILQ_FIRST(&xpt_busses);
4437 retry:
4438         /* Find an unoccupied pathid */
4439         while (bus != NULL
4440             && bus->path_id <= pathid) {
4441                 if (bus->path_id == pathid)
4442                         pathid++;
4443                 bus = TAILQ_NEXT(bus, links);
4444         }
4445
4446         /*
4447          * Ensure that this pathid is not reserved for
4448          * a bus that may be registered in the future.
4449          */
4450         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4451                 ++pathid;
4452                 /* Start the search over */
4453                 goto retry;
4454         }
4455         return (pathid);
4456 }
4457
4458 static path_id_t
4459 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4460 {
4461         path_id_t pathid;
4462         int i, dunit, val;
4463         char buf[32];
4464         const char *dname;
4465
4466         pathid = CAM_XPT_PATH_ID;
4467         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4468         i = 0;
4469         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4470                 if (strcmp(dname, "scbus")) {
4471                         /* Avoid a bit of foot shooting. */
4472                         continue;
4473                 }
4474                 if (dunit < 0)          /* unwired?! */
4475                         continue;
4476                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4477                         if (sim_bus == val) {
4478                                 pathid = dunit;
4479                                 break;
4480                         }
4481                 } else if (sim_bus == 0) {
4482                         /* Unspecified matches bus 0 */
4483                         pathid = dunit;
4484                         break;
4485                 } else {
4486                         printf("Ambiguous scbus configuration for %s%d "
4487                                "bus %d, cannot wire down.  The kernel "
4488                                "config entry for scbus%d should "
4489                                "specify a controller bus.\n"
4490                                "Scbus will be assigned dynamically.\n",
4491                                sim_name, sim_unit, sim_bus, dunit);
4492                         break;
4493                 }
4494         }
4495
4496         if (pathid == CAM_XPT_PATH_ID)
4497                 pathid = xptnextfreepathid();
4498         return (pathid);
4499 }
4500
4501 void
4502 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4503 {
4504         struct cam_eb *bus;
4505         struct cam_et *target, *next_target;
4506         struct cam_ed *device, *next_device;
4507         int s;
4508
4509         GIANT_REQUIRED;
4510
4511         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n"));
4512
4513         /*
4514          * Most async events come from a CAM interrupt context.  In
4515          * a few cases, the error recovery code at the peripheral layer,
4516          * which may run from our SWI or a process context, may signal
4517          * deferred events with a call to xpt_async. Ensure async
4518          * notifications are serialized by blocking cam interrupts.
4519          */
4520         s = splcam();
4521
4522         bus = path->bus;
4523
4524         if (async_code == AC_BUS_RESET) {
4525                 int s;
4526
4527                 s = splclock();
4528                 /* Update our notion of when the last reset occurred */
4529                 microtime(&bus->last_reset);
4530                 splx(s);
4531         }
4532
4533         for (target = TAILQ_FIRST(&bus->et_entries);
4534              target != NULL;
4535              target = next_target) {
4536
4537                 next_target = TAILQ_NEXT(target, links);
4538
4539                 if (path->target != target
4540                  && path->target->target_id != CAM_TARGET_WILDCARD
4541                  && target->target_id != CAM_TARGET_WILDCARD)
4542                         continue;
4543
4544                 if (async_code == AC_SENT_BDR) {
4545                         int s;
4546
4547                         /* Update our notion of when the last reset occurred */
4548                         s = splclock();
4549                         microtime(&path->target->last_reset);
4550                         splx(s);
4551                 }
4552
4553                 for (device = TAILQ_FIRST(&target->ed_entries);
4554                      device != NULL;
4555                      device = next_device) {
4556
4557                         next_device = TAILQ_NEXT(device, links);
4558
4559                         if (path->device != device
4560                          && path->device->lun_id != CAM_LUN_WILDCARD
4561                          && device->lun_id != CAM_LUN_WILDCARD)
4562                                 continue;
4563
4564                         xpt_dev_async(async_code, bus, target,
4565                                       device, async_arg);
4566
4567                         xpt_async_bcast(&device->asyncs, async_code,
4568                                         path, async_arg);
4569                 }
4570         }
4571
4572         /*
4573          * If this wasn't a fully wildcarded async, tell all
4574          * clients that want all async events.
4575          */
4576         if (bus != xpt_periph->path->bus)
4577                 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code,
4578                                 path, async_arg);
4579         splx(s);
4580 }
4581
4582 static void
4583 xpt_async_bcast(struct async_list *async_head,
4584                 u_int32_t async_code,
4585                 struct cam_path *path, void *async_arg)
4586 {
4587         struct async_node *cur_entry;
4588
4589         cur_entry = SLIST_FIRST(async_head);
4590         while (cur_entry != NULL) {
4591                 struct async_node *next_entry;
4592                 /*
4593                  * Grab the next list entry before we call the current
4594                  * entry's callback.  This is because the callback function
4595                  * can delete its async callback entry.
4596                  */
4597                 next_entry = SLIST_NEXT(cur_entry, links);
4598                 if ((cur_entry->event_enable & async_code) != 0)
4599                         cur_entry->callback(cur_entry->callback_arg,
4600                                             async_code, path,
4601                                             async_arg);
4602                 cur_entry = next_entry;
4603         }
4604 }
4605
4606 /*
4607  * Handle any per-device event notifications that require action by the XPT.
4608  */
4609 static void
4610 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target,
4611               struct cam_ed *device, void *async_arg)
4612 {
4613         cam_status status;
4614         struct cam_path newpath;
4615
4616         /*
4617          * We only need to handle events for real devices.
4618          */
4619         if (target->target_id == CAM_TARGET_WILDCARD
4620          || device->lun_id == CAM_LUN_WILDCARD)
4621                 return;
4622
4623         /*
4624          * We need our own path with wildcards expanded to
4625          * handle certain types of events.
4626          */
4627         if ((async_code == AC_SENT_BDR)
4628          || (async_code == AC_BUS_RESET)
4629          || (async_code == AC_INQ_CHANGED))
4630                 status = xpt_compile_path(&newpath, NULL,
4631                                           bus->path_id,
4632                                           target->target_id,
4633                                           device->lun_id);
4634         else
4635                 status = CAM_REQ_CMP_ERR;
4636
4637         if (status == CAM_REQ_CMP) {
4638
4639                 /*
4640                  * Allow transfer negotiation to occur in a
4641                  * tag free environment.
4642                  */
4643                 if (async_code == AC_SENT_BDR
4644                  || async_code == AC_BUS_RESET)
4645                         xpt_toggle_tags(&newpath);
4646
4647                 if (async_code == AC_INQ_CHANGED) {
4648                         /*
4649                          * We've sent a start unit command, or
4650                          * something similar to a device that
4651                          * may have caused its inquiry data to
4652                          * change. So we re-scan the device to
4653                          * refresh the inquiry data for it.
4654                          */
4655                         xpt_scan_lun(newpath.periph, &newpath,
4656                                      CAM_EXPECT_INQ_CHANGE, NULL);
4657                 }
4658                 xpt_release_path(&newpath);
4659         } else if (async_code == AC_LOST_DEVICE) {
4660                 device->flags |= CAM_DEV_UNCONFIGURED;
4661         } else if (async_code == AC_TRANSFER_NEG) {
4662                 struct ccb_trans_settings *settings;
4663
4664                 settings = (struct ccb_trans_settings *)async_arg;
4665                 xpt_set_transfer_settings(settings, device,
4666                                           /*async_update*/TRUE);
4667         }
4668 }
4669
4670 u_int32_t
4671 xpt_freeze_devq(struct cam_path *path, u_int count)
4672 {
4673         int s;
4674         struct ccb_hdr *ccbh;
4675
4676         GIANT_REQUIRED;
4677
4678         s = splcam();
4679         path->device->qfrozen_cnt += count;
4680
4681         /*
4682          * Mark the last CCB in the queue as needing
4683          * to be requeued if the driver hasn't
4684          * changed it's state yet.  This fixes a race
4685          * where a ccb is just about to be queued to
4686          * a controller driver when it's interrupt routine
4687          * freezes the queue.  To completly close the
4688          * hole, controller drives must check to see
4689          * if a ccb's status is still CAM_REQ_INPROG
4690          * under spl protection just before they queue
4691          * the CCB.  See ahc_action/ahc_freeze_devq for
4692          * an example.
4693          */
4694         ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq);
4695         if (ccbh && ccbh->status == CAM_REQ_INPROG)
4696                 ccbh->status = CAM_REQUEUE_REQ;
4697         splx(s);
4698         return (path->device->qfrozen_cnt);
4699 }
4700
4701 u_int32_t
4702 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4703 {
4704         GIANT_REQUIRED;
4705
4706         sim->devq->send_queue.qfrozen_cnt += count;
4707         if (sim->devq->active_dev != NULL) {
4708                 struct ccb_hdr *ccbh;
4709
4710                 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs,
4711                                   ccb_hdr_tailq);
4712                 if (ccbh && ccbh->status == CAM_REQ_INPROG)
4713                         ccbh->status = CAM_REQUEUE_REQ;
4714         }
4715         return (sim->devq->send_queue.qfrozen_cnt);
4716 }
4717
4718 static void
4719 xpt_release_devq_timeout(void *arg)
4720 {
4721         struct cam_ed *device;
4722
4723         device = (struct cam_ed *)arg;
4724
4725         xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE);
4726 }
4727
4728 void
4729 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4730 {
4731         GIANT_REQUIRED;
4732
4733         xpt_release_devq_device(path->device, count, run_queue);
4734 }
4735
4736 static void
4737 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4738 {
4739         int     rundevq;
4740         int     s0, s1;
4741
4742         rundevq = 0;
4743         s0 = splsoftcam();
4744         s1 = splcam();
4745         if (dev->qfrozen_cnt > 0) {
4746
4747                 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count;
4748                 dev->qfrozen_cnt -= count;
4749                 if (dev->qfrozen_cnt == 0) {
4750
4751                         /*
4752                          * No longer need to wait for a successful
4753                          * command completion.
4754                          */
4755                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4756
4757                         /*
4758                          * Remove any timeouts that might be scheduled
4759                          * to release this queue.
4760                          */
4761                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4762                                 untimeout(xpt_release_devq_timeout, dev,
4763                                           dev->c_handle);
4764                                 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4765                         }
4766
4767                         /*
4768                          * Now that we are unfrozen schedule the
4769                          * device so any pending transactions are
4770                          * run.
4771                          */
4772                         if ((dev->ccbq.queue.entries > 0)
4773                          && (xpt_schedule_dev_sendq(dev->target->bus, dev))
4774                          && (run_queue != 0)) {
4775                                 rundevq = 1;
4776                         }
4777                 }
4778         }
4779         splx(s1);
4780         if (rundevq != 0)
4781                 xpt_run_dev_sendq(dev->target->bus);
4782         splx(s0);
4783 }
4784
4785 void
4786 xpt_release_simq(struct cam_sim *sim, int run_queue)
4787 {
4788         int     s;
4789         struct  camq *sendq;
4790
4791         GIANT_REQUIRED;
4792
4793         sendq = &(sim->devq->send_queue);
4794         s = splcam();
4795         if (sendq->qfrozen_cnt > 0) {
4796
4797                 sendq->qfrozen_cnt--;
4798                 if (sendq->qfrozen_cnt == 0) {
4799                         struct cam_eb *bus;
4800
4801                         /*
4802                          * If there is a timeout scheduled to release this
4803                          * sim queue, remove it.  The queue frozen count is
4804                          * already at 0.
4805                          */
4806                         if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4807                                 untimeout(xpt_release_simq_timeout, sim,
4808                                           sim->c_handle);
4809                                 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4810                         }
4811                         bus = xpt_find_bus(sim->path_id);
4812                         splx(s);
4813
4814                         if (run_queue) {
4815                                 /*
4816                                  * Now that we are unfrozen run the send queue.
4817                                  */
4818                                 xpt_run_dev_sendq(bus);
4819                         }
4820                         xpt_release_bus(bus);
4821                 } else
4822                         splx(s);
4823         } else
4824                 splx(s);
4825 }
4826
4827 static void
4828 xpt_release_simq_timeout(void *arg)
4829 {
4830         struct cam_sim *sim;
4831
4832         sim = (struct cam_sim *)arg;
4833         xpt_release_simq(sim, /* run_queue */ TRUE);
4834 }
4835
4836 void
4837 xpt_done(union ccb *done_ccb)
4838 {
4839         int s;
4840
4841         s = splcam();
4842
4843         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4844         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) {
4845                 /*
4846                  * Queue up the request for handling by our SWI handler
4847                  * any of the "non-immediate" type of ccbs.
4848                  */
4849                 switch (done_ccb->ccb_h.path->periph->type) {
4850                 case CAM_PERIPH_BIO:
4851                         mtx_lock(&cam_bioq_lock);
4852                         TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h,
4853                                           sim_links.tqe);
4854                         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4855                         mtx_unlock(&cam_bioq_lock);
4856                         swi_sched(cambio_ih, 0);
4857                         break;
4858                 default:
4859                         panic("unknown periph type %d",
4860                             done_ccb->ccb_h.path->periph->type);
4861                 }
4862         }
4863         splx(s);
4864 }
4865
4866 union ccb *
4867 xpt_alloc_ccb()
4868 {
4869         union ccb *new_ccb;
4870
4871         GIANT_REQUIRED;
4872
4873         new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_WAITOK);
4874         return (new_ccb);
4875 }
4876
4877 union ccb *
4878 xpt_alloc_ccb_nowait()
4879 {
4880         union ccb *new_ccb;
4881
4882         GIANT_REQUIRED;
4883
4884         new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_NOWAIT);
4885         return (new_ccb);
4886 }
4887
4888 void
4889 xpt_free_ccb(union ccb *free_ccb)
4890 {
4891         free(free_ccb, M_CAMXPT);
4892 }
4893
4894
4895
4896 /* Private XPT functions */
4897
4898 /*
4899  * Get a CAM control block for the caller. Charge the structure to the device
4900  * referenced by the path.  If the this device has no 'credits' then the
4901  * device already has the maximum number of outstanding operations under way
4902  * and we return NULL. If we don't have sufficient resources to allocate more
4903  * ccbs, we also return NULL.
4904  */
4905 static union ccb *
4906 xpt_get_ccb(struct cam_ed *device)
4907 {
4908         union ccb *new_ccb;
4909         int s;
4910
4911         s = splsoftcam();
4912         if ((new_ccb = (union ccb *)SLIST_FIRST(&ccb_freeq)) == NULL) {
4913                 new_ccb = xpt_alloc_ccb_nowait();
4914                 if (new_ccb == NULL) {
4915                         splx(s);
4916                         return (NULL);
4917                 }
4918                 callout_handle_init(&new_ccb->ccb_h.timeout_ch);
4919                 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h,
4920                                   xpt_links.sle);
4921                 xpt_ccb_count++;
4922         }
4923         cam_ccbq_take_opening(&device->ccbq);
4924         SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle);
4925         splx(s);
4926         return (new_ccb);
4927 }
4928
4929 static void
4930 xpt_release_bus(struct cam_eb *bus)
4931 {
4932         int s;
4933
4934         s = splcam();
4935         if ((--bus->refcount == 0)
4936          && (TAILQ_FIRST(&bus->et_entries) == NULL)) {
4937                 TAILQ_REMOVE(&xpt_busses, bus, links);
4938                 bus_generation++;
4939                 splx(s);
4940                 free(bus, M_CAMXPT);
4941         } else
4942                 splx(s);
4943 }
4944
4945 static struct cam_et *
4946 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4947 {
4948         struct cam_et *target;
4949
4950         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, M_NOWAIT);
4951         if (target != NULL) {
4952                 struct cam_et *cur_target;
4953
4954                 TAILQ_INIT(&target->ed_entries);
4955                 target->bus = bus;
4956                 target->target_id = target_id;
4957                 target->refcount = 1;
4958                 target->generation = 0;
4959                 timevalclear(&target->last_reset);
4960                 /*
4961                  * Hold a reference to our parent bus so it
4962                  * will not go away before we do.
4963                  */
4964                 bus->refcount++;
4965
4966                 /* Insertion sort into our bus's target list */
4967                 cur_target = TAILQ_FIRST(&bus->et_entries);
4968                 while (cur_target != NULL && cur_target->target_id < target_id)
4969                         cur_target = TAILQ_NEXT(cur_target, links);
4970
4971                 if (cur_target != NULL) {
4972                         TAILQ_INSERT_BEFORE(cur_target, target, links);
4973                 } else {
4974                         TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4975                 }
4976                 bus->generation++;
4977         }
4978         return (target);
4979 }
4980
4981 static void
4982 xpt_release_target(struct cam_eb *bus, struct cam_et *target)
4983 {
4984         int s;
4985
4986         s = splcam();
4987         if ((--target->refcount == 0)
4988          && (TAILQ_FIRST(&target->ed_entries) == NULL)) {
4989                 TAILQ_REMOVE(&bus->et_entries, target, links);
4990                 bus->generation++;
4991                 splx(s);
4992                 free(target, M_CAMXPT);
4993                 xpt_release_bus(bus);
4994         } else
4995                 splx(s);
4996 }
4997
4998 static struct cam_ed *
4999 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
5000 {
5001 #ifdef CAM_NEW_TRAN_CODE
5002         struct     cam_path path;
5003 #endif /* CAM_NEW_TRAN_CODE */
5004         struct     cam_ed *device;
5005         struct     cam_devq *devq;
5006         cam_status status;
5007
5008         /* Make space for us in the device queue on our bus */
5009         devq = bus->sim->devq;
5010         status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1);
5011
5012         if (status != CAM_REQ_CMP) {
5013                 device = NULL;
5014         } else {
5015                 device = (struct cam_ed *)malloc(sizeof(*device),
5016                                                  M_CAMXPT, M_NOWAIT);
5017         }
5018
5019         if (device != NULL) {
5020                 struct cam_ed *cur_device;
5021
5022                 cam_init_pinfo(&device->alloc_ccb_entry.pinfo);
5023                 device->alloc_ccb_entry.device = device;
5024                 cam_init_pinfo(&device->send_ccb_entry.pinfo);
5025                 device->send_ccb_entry.device = device;
5026                 device->target = target;
5027                 device->lun_id = lun_id;
5028                 /* Initialize our queues */
5029                 if (camq_init(&device->drvq, 0) != 0) {
5030                         free(device, M_CAMXPT);
5031                         return (NULL);
5032                 }
5033                 if (cam_ccbq_init(&device->ccbq,
5034                                   bus->sim->max_dev_openings) != 0) {
5035                         camq_fini(&device->drvq);
5036                         free(device, M_CAMXPT);
5037                         return (NULL);
5038                 }
5039                 SLIST_INIT(&device->asyncs);
5040                 SLIST_INIT(&device->periphs);
5041                 device->generation = 0;
5042                 device->owner = NULL;
5043                 /*
5044                  * Take the default quirk entry until we have inquiry
5045                  * data and can determine a better quirk to use.
5046                  */
5047                 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1];
5048                 bzero(&device->inq_data, sizeof(device->inq_data));
5049                 device->inq_flags = 0;
5050                 device->queue_flags = 0;
5051                 device->serial_num = NULL;
5052                 device->serial_num_len = 0;
5053                 device->qfrozen_cnt = 0;
5054                 device->flags = CAM_DEV_UNCONFIGURED;
5055                 device->tag_delay_count = 0;
5056                 device->tag_saved_openings = 0;
5057                 device->refcount = 1;
5058                 callout_handle_init(&device->c_handle);
5059
5060                 /*
5061                  * Hold a reference to our parent target so it
5062                  * will not go away before we do.
5063                  */
5064                 target->refcount++;
5065
5066                 /*
5067                  * XXX should be limited by number of CCBs this bus can
5068                  * do.
5069                  */
5070                 xpt_max_ccbs += device->ccbq.devq_openings;
5071                 /* Insertion sort into our target's device list */
5072                 cur_device = TAILQ_FIRST(&target->ed_entries);
5073                 while (cur_device != NULL && cur_device->lun_id < lun_id)
5074                         cur_device = TAILQ_NEXT(cur_device, links);
5075                 if (cur_device != NULL) {
5076                         TAILQ_INSERT_BEFORE(cur_device, device, links);
5077                 } else {
5078                         TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
5079                 }
5080                 target->generation++;
5081 #ifdef CAM_NEW_TRAN_CODE
5082                 if (lun_id != CAM_LUN_WILDCARD) {
5083                         xpt_compile_path(&path,
5084                                          NULL,
5085                                          bus->path_id,
5086                                          target->target_id,
5087                                          lun_id);
5088                         xpt_devise_transport(&path);
5089                         xpt_release_path(&path);
5090                 }
5091 #endif /* CAM_NEW_TRAN_CODE */
5092         }
5093         return (device);
5094 }
5095
5096 static void
5097 xpt_release_device(struct cam_eb *bus, struct cam_et *target,
5098                    struct cam_ed *device)
5099 {
5100         int s;
5101
5102         s = splcam();
5103         if ((--device->refcount == 0)
5104          && ((device->flags & CAM_DEV_UNCONFIGURED) != 0)) {
5105                 struct cam_devq *devq;
5106
5107                 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX
5108                  || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX)
5109                         panic("Removing device while still queued for ccbs");
5110
5111                 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
5112                                 untimeout(xpt_release_devq_timeout, device,
5113                                           device->c_handle);
5114
5115                 TAILQ_REMOVE(&target->ed_entries, device,links);
5116                 target->generation++;
5117                 xpt_max_ccbs -= device->ccbq.devq_openings;
5118                 /* Release our slot in the devq */
5119                 devq = bus->sim->devq;
5120                 cam_devq_resize(devq, devq->alloc_queue.array_size - 1);
5121                 splx(s);
5122                 camq_fini(&device->drvq);
5123                 camq_fini(&device->ccbq.queue);
5124                 free(device, M_CAMXPT);
5125                 xpt_release_target(bus, target);
5126         } else
5127                 splx(s);
5128 }
5129
5130 static u_int32_t
5131 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
5132 {
5133         int     s;
5134         int     diff;
5135         int     result;
5136         struct  cam_ed *dev;
5137
5138         dev = path->device;
5139         s = splsoftcam();
5140
5141         diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings);
5142         result = cam_ccbq_resize(&dev->ccbq, newopenings);
5143         if (result == CAM_REQ_CMP && (diff < 0)) {
5144                 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED;
5145         }
5146         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5147          || (dev->inq_flags & SID_CmdQue) != 0)
5148                 dev->tag_saved_openings = newopenings;
5149         /* Adjust the global limit */
5150         xpt_max_ccbs += diff;
5151         splx(s);
5152         return (result);
5153 }
5154
5155 static struct cam_eb *
5156 xpt_find_bus(path_id_t path_id)
5157 {
5158         struct cam_eb *bus;
5159
5160         for (bus = TAILQ_FIRST(&xpt_busses);
5161              bus != NULL;
5162              bus = TAILQ_NEXT(bus, links)) {
5163                 if (bus->path_id == path_id) {
5164                         bus->refcount++;
5165                         break;
5166                 }
5167         }
5168         return (bus);
5169 }
5170
5171 static struct cam_et *
5172 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5173 {
5174         struct cam_et *target;
5175
5176         for (target = TAILQ_FIRST(&bus->et_entries);
5177              target != NULL;
5178              target = TAILQ_NEXT(target, links)) {
5179                 if (target->target_id == target_id) {
5180                         target->refcount++;
5181                         break;
5182                 }
5183         }
5184         return (target);
5185 }
5186
5187 static struct cam_ed *
5188 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5189 {
5190         struct cam_ed *device;
5191
5192         for (device = TAILQ_FIRST(&target->ed_entries);
5193              device != NULL;
5194              device = TAILQ_NEXT(device, links)) {
5195                 if (device->lun_id == lun_id) {
5196                         device->refcount++;
5197                         break;
5198                 }
5199         }
5200         return (device);
5201 }
5202
5203 typedef struct {
5204         union   ccb *request_ccb;
5205         struct  ccb_pathinq *cpi;
5206         int     pending_count;
5207 } xpt_scan_bus_info;
5208
5209 /*
5210  * To start a scan, request_ccb is an XPT_SCAN_BUS ccb.
5211  * As the scan progresses, xpt_scan_bus is used as the
5212  * callback on completion function.
5213  */
5214 static void
5215 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb)
5216 {
5217         CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
5218                   ("xpt_scan_bus\n"));
5219         switch (request_ccb->ccb_h.func_code) {
5220         case XPT_SCAN_BUS:
5221         {
5222                 xpt_scan_bus_info *scan_info;
5223                 union   ccb *work_ccb;
5224                 struct  cam_path *path;
5225                 u_int   i;
5226                 u_int   max_target;
5227                 u_int   initiator_id;
5228
5229                 /* Find out the characteristics of the bus */
5230                 work_ccb = xpt_alloc_ccb();
5231                 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path,
5232                               request_ccb->ccb_h.pinfo.priority);
5233                 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
5234                 xpt_action(work_ccb);
5235                 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
5236                         request_ccb->ccb_h.status = work_ccb->ccb_h.status;
5237                         xpt_free_ccb(work_ccb);
5238                         xpt_done(request_ccb);
5239                         return;
5240                 }
5241
5242                 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) {
5243                         /*
5244                          * Can't scan the bus on an adapter that
5245                          * cannot perform the initiator role.
5246                          */
5247                         request_ccb->ccb_h.status = CAM_REQ_CMP;
5248                         xpt_free_ccb(work_ccb);
5249                         xpt_done(request_ccb);
5250                         return;
5251                 }
5252
5253                 /* Save some state for use while we probe for devices */
5254                 scan_info = (xpt_scan_bus_info *)
5255                     malloc(sizeof(xpt_scan_bus_info), M_TEMP, M_WAITOK);
5256                 scan_info->request_ccb = request_ccb;
5257                 scan_info->cpi = &work_ccb->cpi;
5258
5259                 /* Cache on our stack so we can work asynchronously */
5260                 max_target = scan_info->cpi->max_target;
5261                 initiator_id = scan_info->cpi->initiator_id;
5262
5263                 /*
5264                  * Don't count the initiator if the
5265                  * initiator is addressable.
5266                  */
5267                 scan_info->pending_count = max_target + 1;
5268                 if (initiator_id <= max_target)
5269                         scan_info->pending_count--;
5270
5271                 for (i = 0; i <= max_target; i++) {
5272                         cam_status status;
5273                         if (i == initiator_id)
5274                                 continue;
5275
5276                         status = xpt_create_path(&path, xpt_periph,
5277                                                  request_ccb->ccb_h.path_id,
5278                                                  i, 0);
5279                         if (status != CAM_REQ_CMP) {
5280                                 printf("xpt_scan_bus: xpt_create_path failed"
5281                                        " with status %#x, bus scan halted\n",
5282                                        status);
5283                                 break;
5284                         }
5285                         work_ccb = xpt_alloc_ccb();
5286                         xpt_setup_ccb(&work_ccb->ccb_h, path,
5287                                       request_ccb->ccb_h.pinfo.priority);
5288                         work_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5289                         work_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5290                         work_ccb->ccb_h.ppriv_ptr0 = scan_info;
5291                         work_ccb->crcn.flags = request_ccb->crcn.flags;
5292                         xpt_action(work_ccb);
5293                 }
5294                 break;
5295         }
5296         case XPT_SCAN_LUN:
5297         {
5298                 xpt_scan_bus_info *scan_info;
5299                 path_id_t path_id;
5300                 target_id_t target_id;
5301                 lun_id_t lun_id;
5302
5303                 /* Reuse the same CCB to query if a device was really found */
5304                 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0;
5305                 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path,
5306                               request_ccb->ccb_h.pinfo.priority);
5307                 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
5308
5309                 path_id = request_ccb->ccb_h.path_id;
5310                 target_id = request_ccb->ccb_h.target_id;
5311                 lun_id = request_ccb->ccb_h.target_lun;
5312                 xpt_action(request_ccb);
5313
5314                 if (request_ccb->ccb_h.status != CAM_REQ_CMP) {
5315                         struct cam_ed *device;
5316                         struct cam_et *target;
5317                         int s, phl;
5318
5319                         /*
5320                          * If we already probed lun 0 successfully, or
5321                          * we have additional configured luns on this
5322                          * target that might have "gone away", go onto
5323                          * the next lun.
5324                          */
5325                         target = request_ccb->ccb_h.path->target;
5326                         /*
5327                          * We may touch devices that we don't
5328                          * hold references too, so ensure they
5329                          * don't disappear out from under us.
5330                          * The target above is referenced by the
5331                          * path in the request ccb.
5332                          */
5333                         phl = 0;
5334                         s = splcam();
5335                         device = TAILQ_FIRST(&target->ed_entries);
5336                         if (device != NULL) {
5337                                 phl = CAN_SRCH_HI(device);
5338                                 if (device->lun_id == 0)
5339                                         device = TAILQ_NEXT(device, links);
5340                         }
5341                         splx(s);
5342                         if ((lun_id != 0) || (device != NULL)) {
5343                                 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl)
5344                                         lun_id++;
5345                         }
5346                 } else {
5347                         struct cam_ed *device;
5348
5349                         device = request_ccb->ccb_h.path->device;
5350
5351                         if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) {
5352                                 /* Try the next lun */
5353                                 if (lun_id < (CAM_SCSI2_MAXLUN-1)
5354                                   || CAN_SRCH_HI(device))
5355                                         lun_id++;
5356                         }
5357                 }
5358
5359                 xpt_free_path(request_ccb->ccb_h.path);
5360
5361                 /* Check Bounds */
5362                 if ((lun_id == request_ccb->ccb_h.target_lun)
5363                  || lun_id > scan_info->cpi->max_lun) {
5364                         /* We're done */
5365
5366                         xpt_free_ccb(request_ccb);
5367                         scan_info->pending_count--;
5368                         if (scan_info->pending_count == 0) {
5369                                 xpt_free_ccb((union ccb *)scan_info->cpi);
5370                                 request_ccb = scan_info->request_ccb;
5371                                 free(scan_info, M_TEMP);
5372                                 request_ccb->ccb_h.status = CAM_REQ_CMP;
5373                                 xpt_done(request_ccb);
5374                         }
5375                 } else {
5376                         /* Try the next device */
5377                         struct cam_path *path;
5378                         cam_status status;
5379
5380                         status = xpt_create_path(&path, xpt_periph,
5381                                                  path_id, target_id, lun_id);
5382                         if (status != CAM_REQ_CMP) {
5383                                 printf("xpt_scan_bus: xpt_create_path failed "
5384                                        "with status %#x, halting LUN scan\n",
5385                                        status);
5386                                 xpt_free_ccb(request_ccb);
5387                                 scan_info->pending_count--;
5388                                 if (scan_info->pending_count == 0) {
5389                                         xpt_free_ccb(
5390                                                 (union ccb *)scan_info->cpi);
5391                                         request_ccb = scan_info->request_ccb;
5392                                         free(scan_info, M_TEMP);
5393                                         request_ccb->ccb_h.status = CAM_REQ_CMP;
5394                                         xpt_done(request_ccb);
5395                                 }
5396                                 break;
5397                         }
5398                         xpt_setup_ccb(&request_ccb->ccb_h, path,
5399                                       request_ccb->ccb_h.pinfo.priority);
5400                         request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5401                         request_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5402                         request_ccb->ccb_h.ppriv_ptr0 = scan_info;
5403                         request_ccb->crcn.flags =
5404                                 scan_info->request_ccb->crcn.flags;
5405                         xpt_action(request_ccb);
5406                 }
5407                 break;
5408         }
5409         default:
5410                 break;
5411         }
5412 }
5413
5414 typedef enum {
5415         PROBE_TUR,
5416         PROBE_INQUIRY,
5417         PROBE_FULL_INQUIRY,
5418         PROBE_MODE_SENSE,
5419         PROBE_SERIAL_NUM,
5420         PROBE_TUR_FOR_NEGOTIATION
5421 } probe_action;
5422
5423 typedef enum {
5424         PROBE_INQUIRY_CKSUM     = 0x01,
5425         PROBE_SERIAL_CKSUM      = 0x02,
5426         PROBE_NO_ANNOUNCE       = 0x04
5427 } probe_flags;
5428
5429 typedef struct {
5430         TAILQ_HEAD(, ccb_hdr) request_ccbs;
5431         probe_action    action;
5432         union ccb       saved_ccb;
5433         probe_flags     flags;
5434         MD5_CTX         context;
5435         u_int8_t        digest[16];
5436 } probe_softc;
5437
5438 static void
5439 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path,
5440              cam_flags flags, union ccb *request_ccb)
5441 {
5442         struct ccb_pathinq cpi;
5443         cam_status status;
5444         struct cam_path *new_path;
5445         struct cam_periph *old_periph;
5446         int s;
5447
5448         CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
5449                   ("xpt_scan_lun\n"));
5450
5451         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
5452         cpi.ccb_h.func_code = XPT_PATH_INQ;
5453         xpt_action((union ccb *)&cpi);
5454
5455         if (cpi.ccb_h.status != CAM_REQ_CMP) {
5456                 if (request_ccb != NULL) {
5457                         request_ccb->ccb_h.status = cpi.ccb_h.status;
5458                         xpt_done(request_ccb);
5459                 }
5460                 return;
5461         }
5462
5463         if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) {
5464                 /*
5465                  * Can't scan the bus on an adapter that
5466                  * cannot perform the initiator role.
5467                  */
5468                 if (request_ccb != NULL) {
5469                         request_ccb->ccb_h.status = CAM_REQ_CMP;
5470                         xpt_done(request_ccb);
5471                 }
5472                 return;
5473         }
5474
5475         if (request_ccb == NULL) {
5476                 request_ccb = malloc(sizeof(union ccb), M_TEMP, M_NOWAIT);
5477                 if (request_ccb == NULL) {
5478                         xpt_print_path(path);
5479                         printf("xpt_scan_lun: can't allocate CCB, can't "
5480                                "continue\n");
5481                         return;
5482                 }
5483                 new_path = malloc(sizeof(*new_path), M_TEMP, M_NOWAIT);
5484                 if (new_path == NULL) {
5485                         xpt_print_path(path);
5486                         printf("xpt_scan_lun: can't allocate path, can't "
5487                                "continue\n");
5488                         free(request_ccb, M_TEMP);
5489                         return;
5490                 }
5491                 status = xpt_compile_path(new_path, xpt_periph,
5492                                           path->bus->path_id,
5493                                           path->target->target_id,
5494                                           path->device->lun_id);
5495
5496                 if (status != CAM_REQ_CMP) {
5497                         xpt_print_path(path);
5498                         printf("xpt_scan_lun: can't compile path, can't "
5499                                "continue\n");
5500                         free(request_ccb, M_TEMP);
5501                         free(new_path, M_TEMP);
5502                         return;
5503                 }
5504                 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1);
5505                 request_ccb->ccb_h.cbfcnp = xptscandone;
5506                 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5507                 request_ccb->crcn.flags = flags;
5508         }
5509
5510         s = splsoftcam();
5511         if ((old_periph = cam_periph_find(path, "probe")) != NULL) {
5512                 probe_softc *softc;
5513
5514                 softc = (probe_softc *)old_periph->softc;
5515                 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5516                                   periph_links.tqe);
5517         } else {
5518                 status = cam_periph_alloc(proberegister, NULL, probecleanup,
5519                                           probestart, "probe",
5520                                           CAM_PERIPH_BIO,
5521                                           request_ccb->ccb_h.path, NULL, 0,
5522                                           request_ccb);
5523
5524                 if (status != CAM_REQ_CMP) {
5525                         xpt_print_path(path);
5526                         printf("xpt_scan_lun: cam_alloc_periph returned an "
5527                                "error, can't continue probe\n");
5528                         request_ccb->ccb_h.status = status;
5529                         xpt_done(request_ccb);
5530                 }
5531         }
5532         splx(s);
5533 }
5534
5535 static void
5536 xptscandone(struct cam_periph *periph, union ccb *done_ccb)
5537 {
5538         xpt_release_path(done_ccb->ccb_h.path);
5539         free(done_ccb->ccb_h.path, M_TEMP);
5540         free(done_ccb, M_TEMP);
5541 }
5542
5543 static cam_status
5544 proberegister(struct cam_periph *periph, void *arg)
5545 {
5546         union ccb *request_ccb; /* CCB representing the probe request */
5547         probe_softc *softc;
5548
5549         request_ccb = (union ccb *)arg;
5550         if (periph == NULL) {
5551                 printf("proberegister: periph was NULL!!\n");
5552                 return(CAM_REQ_CMP_ERR);
5553         }
5554
5555         if (request_ccb == NULL) {
5556                 printf("proberegister: no probe CCB, "
5557                        "can't register device\n");
5558                 return(CAM_REQ_CMP_ERR);
5559         }
5560
5561         softc = (probe_softc *)malloc(sizeof(*softc), M_TEMP, M_NOWAIT);
5562
5563         if (softc == NULL) {
5564                 printf("proberegister: Unable to probe new device. "
5565                        "Unable to allocate softc\n");
5566                 return(CAM_REQ_CMP_ERR);
5567         }
5568         TAILQ_INIT(&softc->request_ccbs);
5569         TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5570                           periph_links.tqe);
5571         softc->flags = 0;
5572         periph->softc = softc;
5573         cam_periph_acquire(periph);
5574         /*
5575          * Ensure we've waited at least a bus settle
5576          * delay before attempting to probe the device.
5577          * For HBAs that don't do bus resets, this won't make a difference.
5578          */
5579         cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset,
5580                                       scsi_delay);
5581         probeschedule(periph);
5582         return(CAM_REQ_CMP);
5583 }
5584
5585 static void
5586 probeschedule(struct cam_periph *periph)
5587 {
5588         struct ccb_pathinq cpi;
5589         union ccb *ccb;
5590         probe_softc *softc;
5591
5592         softc = (probe_softc *)periph->softc;
5593         ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
5594
5595         xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
5596         cpi.ccb_h.func_code = XPT_PATH_INQ;
5597         xpt_action((union ccb *)&cpi);
5598
5599         /*
5600          * If a device has gone away and another device, or the same one,
5601          * is back in the same place, it should have a unit attention
5602          * condition pending.  It will not report the unit attention in
5603          * response to an inquiry, which may leave invalid transfer
5604          * negotiations in effect.  The TUR will reveal the unit attention
5605          * condition.  Only send the TUR for lun 0, since some devices
5606          * will get confused by commands other than inquiry to non-existent
5607          * luns.  If you think a device has gone away start your scan from
5608          * lun 0.  This will insure that any bogus transfer settings are
5609          * invalidated.
5610          *
5611          * If we haven't seen the device before and the controller supports
5612          * some kind of transfer negotiation, negotiate with the first
5613          * sent command if no bus reset was performed at startup.  This
5614          * ensures that the device is not confused by transfer negotiation
5615          * settings left over by loader or BIOS action.
5616          */
5617         if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
5618          && (ccb->ccb_h.target_lun == 0)) {
5619                 softc->action = PROBE_TUR;
5620         } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0
5621               && (cpi.hba_misc & PIM_NOBUSRESET) != 0) {
5622                 proberequestdefaultnegotiation(periph);
5623                 softc->action = PROBE_INQUIRY;
5624         } else {
5625                 softc->action = PROBE_INQUIRY;
5626         }
5627
5628         if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE)
5629                 softc->flags |= PROBE_NO_ANNOUNCE;
5630         else
5631                 softc->flags &= ~PROBE_NO_ANNOUNCE;
5632
5633         xpt_schedule(periph, ccb->ccb_h.pinfo.priority);
5634 }
5635
5636 static void
5637 probestart(struct cam_periph *periph, union ccb *start_ccb)
5638 {
5639         /* Probe the device that our peripheral driver points to */
5640         struct ccb_scsiio *csio;
5641         probe_softc *softc;
5642
5643         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n"));
5644
5645         softc = (probe_softc *)periph->softc;
5646         csio = &start_ccb->csio;
5647
5648         switch (softc->action) {
5649         case PROBE_TUR:
5650         case PROBE_TUR_FOR_NEGOTIATION:
5651         {
5652                 scsi_test_unit_ready(csio,
5653                                      /*retries*/4,
5654                                      probedone,
5655                                      MSG_SIMPLE_Q_TAG,
5656                                      SSD_FULL_SIZE,
5657                                      /*timeout*/60000);
5658                 break;
5659         }
5660         case PROBE_INQUIRY:
5661         case PROBE_FULL_INQUIRY:
5662         {
5663                 u_int inquiry_len;
5664                 struct scsi_inquiry_data *inq_buf;
5665
5666                 inq_buf = &periph->path->device->inq_data;
5667                 /*
5668                  * If the device is currently configured, we calculate an
5669                  * MD5 checksum of the inquiry data, and if the serial number
5670                  * length is greater than 0, add the serial number data
5671                  * into the checksum as well.  Once the inquiry and the
5672                  * serial number check finish, we attempt to figure out
5673                  * whether we still have the same device.
5674                  */
5675                 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
5676
5677                         MD5Init(&softc->context);
5678                         MD5Update(&softc->context, (unsigned char *)inq_buf,
5679                                   sizeof(struct scsi_inquiry_data));
5680                         softc->flags |= PROBE_INQUIRY_CKSUM;
5681                         if (periph->path->device->serial_num_len > 0) {
5682                                 MD5Update(&softc->context,
5683                                           periph->path->device->serial_num,
5684                                           periph->path->device->serial_num_len);
5685                                 softc->flags |= PROBE_SERIAL_CKSUM;
5686                         }
5687                         MD5Final(softc->digest, &softc->context);
5688                 }
5689
5690                 if (softc->action == PROBE_INQUIRY)
5691                         inquiry_len = SHORT_INQUIRY_LENGTH;
5692                 else
5693                         inquiry_len = inq_buf->additional_length
5694                                     + offsetof(struct scsi_inquiry_data,
5695                                                additional_length) + 1;
5696
5697                 /*
5698                  * Some parallel SCSI devices fail to send an
5699                  * ignore wide residue message when dealing with
5700                  * odd length inquiry requests.  Round up to be
5701                  * safe.
5702                  */
5703                 inquiry_len = roundup2(inquiry_len, 2);
5704
5705                 scsi_inquiry(csio,
5706                              /*retries*/4,
5707                              probedone,
5708                              MSG_SIMPLE_Q_TAG,
5709                              (u_int8_t *)inq_buf,
5710                              inquiry_len,
5711                              /*evpd*/FALSE,
5712                              /*page_code*/0,
5713                              SSD_MIN_SIZE,
5714                              /*timeout*/60 * 1000);
5715                 break;
5716         }
5717         case PROBE_MODE_SENSE:
5718         {
5719                 void  *mode_buf;
5720                 int    mode_buf_len;
5721
5722                 mode_buf_len = sizeof(struct scsi_mode_header_6)
5723                              + sizeof(struct scsi_mode_blk_desc)
5724                              + sizeof(struct scsi_control_page);
5725                 mode_buf = malloc(mode_buf_len, M_TEMP, M_NOWAIT);
5726                 if (mode_buf != NULL) {
5727                         scsi_mode_sense(csio,
5728                                         /*retries*/4,
5729                                         probedone,
5730                                         MSG_SIMPLE_Q_TAG,
5731                                         /*dbd*/FALSE,
5732                                         SMS_PAGE_CTRL_CURRENT,
5733                                         SMS_CONTROL_MODE_PAGE,
5734                                         mode_buf,
5735                                         mode_buf_len,
5736                                         SSD_FULL_SIZE,
5737                                         /*timeout*/60000);
5738                         break;
5739                 }
5740                 xpt_print_path(periph->path);
5741                 printf("Unable to mode sense control page - malloc failure\n");
5742                 softc->action = PROBE_SERIAL_NUM;
5743         }
5744         /* FALLTHROUGH */
5745         case PROBE_SERIAL_NUM:
5746         {
5747                 struct scsi_vpd_unit_serial_number *serial_buf;
5748                 struct cam_ed* device;
5749
5750                 serial_buf = NULL;
5751                 device = periph->path->device;
5752                 device->serial_num = NULL;
5753                 device->serial_num_len = 0;
5754
5755                 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0)
5756                         serial_buf = (struct scsi_vpd_unit_serial_number *)
5757                                 malloc(sizeof(*serial_buf), M_TEMP,
5758                                         M_NOWAIT | M_ZERO);
5759
5760                 if (serial_buf != NULL) {
5761                         scsi_inquiry(csio,
5762                                      /*retries*/4,
5763                                      probedone,
5764                                      MSG_SIMPLE_Q_TAG,
5765                                      (u_int8_t *)serial_buf,
5766                                      sizeof(*serial_buf),
5767                                      /*evpd*/TRUE,
5768                                      SVPD_UNIT_SERIAL_NUMBER,
5769                                      SSD_MIN_SIZE,
5770                                      /*timeout*/60 * 1000);
5771                         break;
5772                 }
5773                 /*
5774                  * We'll have to do without, let our probedone
5775                  * routine finish up for us.
5776                  */
5777                 start_ccb->csio.data_ptr = NULL;
5778                 probedone(periph, start_ccb);
5779                 return;
5780         }
5781         }
5782         xpt_action(start_ccb);
5783 }
5784
5785 static void
5786 proberequestdefaultnegotiation(struct cam_periph *periph)
5787 {
5788         struct ccb_trans_settings cts;
5789
5790         xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1);
5791         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
5792 #ifdef CAM_NEW_TRAN_CODE
5793         cts.type = CTS_TYPE_USER_SETTINGS;
5794 #else /* CAM_NEW_TRAN_CODE */
5795         cts.flags = CCB_TRANS_USER_SETTINGS;
5796 #endif /* CAM_NEW_TRAN_CODE */
5797         xpt_action((union ccb *)&cts);
5798         cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
5799 #ifdef CAM_NEW_TRAN_CODE
5800         cts.type = CTS_TYPE_CURRENT_SETTINGS;
5801 #else /* CAM_NEW_TRAN_CODE */
5802         cts.flags &= ~CCB_TRANS_USER_SETTINGS;
5803         cts.flags |= CCB_TRANS_CURRENT_SETTINGS;
5804 #endif /* CAM_NEW_TRAN_CODE */
5805         xpt_action((union ccb *)&cts);
5806 }
5807
5808 static void
5809 probedone(struct cam_periph *periph, union ccb *done_ccb)
5810 {
5811         probe_softc *softc;
5812         struct cam_path *path;
5813         u_int32_t  priority;
5814
5815         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n"));
5816
5817         softc = (probe_softc *)periph->softc;
5818         path = done_ccb->ccb_h.path;
5819         priority = done_ccb->ccb_h.pinfo.priority;
5820
5821         switch (softc->action) {
5822         case PROBE_TUR:
5823         {
5824                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
5825
5826                         if (cam_periph_error(done_ccb, 0,
5827                                              SF_NO_PRINT, NULL) == ERESTART)
5828                                 return;
5829                         else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
5830                                 /* Don't wedge the queue */
5831                                 xpt_release_devq(done_ccb->ccb_h.path,
5832                                                  /*count*/1,
5833                                                  /*run_queue*/TRUE);
5834                 }
5835                 softc->action = PROBE_INQUIRY;
5836                 xpt_release_ccb(done_ccb);
5837                 xpt_schedule(periph, priority);
5838                 return;
5839         }
5840         case PROBE_INQUIRY:
5841         case PROBE_FULL_INQUIRY:
5842         {
5843                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
5844                         struct scsi_inquiry_data *inq_buf;
5845                         u_int8_t periph_qual;
5846
5847                         path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID;
5848                         inq_buf = &path->device->inq_data;
5849
5850                         periph_qual = SID_QUAL(inq_buf);
5851
5852                         switch(periph_qual) {
5853                         case SID_QUAL_LU_CONNECTED:
5854                         {
5855                                 u_int8_t len;
5856
5857                                 /*
5858                                  * We conservatively request only
5859                                  * SHORT_INQUIRY_LEN bytes of inquiry
5860                                  * information during our first try
5861                                  * at sending an INQUIRY. If the device
5862                                  * has more information to give,
5863                                  * perform a second request specifying
5864                                  * the amount of information the device
5865                                  * is willing to give.
5866                                  */
5867                                 len = inq_buf->additional_length
5868                                     + offsetof(struct scsi_inquiry_data,
5869                                                additional_length) + 1;
5870                                 if (softc->action == PROBE_INQUIRY
5871                                  && len > SHORT_INQUIRY_LENGTH) {
5872                                         softc->action = PROBE_FULL_INQUIRY;
5873                                         xpt_release_ccb(done_ccb);
5874                                         xpt_schedule(periph, priority);
5875                                         return;
5876                                 }
5877
5878                                 xpt_find_quirk(path->device);
5879
5880 #ifdef CAM_NEW_TRAN_CODE
5881                                 xpt_devise_transport(path);
5882 #endif /* CAM_NEW_TRAN_CODE */
5883                                 if ((inq_buf->flags & SID_CmdQue) != 0)
5884                                         softc->action = PROBE_MODE_SENSE;
5885                                 else
5886                                         softc->action = PROBE_SERIAL_NUM;
5887
5888                                 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
5889
5890                                 xpt_release_ccb(done_ccb);
5891                                 xpt_schedule(periph, priority);
5892                                 return;
5893                         }
5894                         default:
5895                                 break;
5896                         }
5897                 } else if (cam_periph_error(done_ccb, 0,
5898                                             done_ccb->ccb_h.target_lun > 0
5899                                             ? SF_RETRY_UA|SF_QUIET_IR
5900                                             : SF_RETRY_UA,
5901                                             &softc->saved_ccb) == ERESTART) {
5902                         return;
5903                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5904                         /* Don't wedge the queue */
5905                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
5906                                          /*run_queue*/TRUE);
5907                 }
5908                 /*
5909                  * If we get to this point, we got an error status back
5910                  * from the inquiry and the error status doesn't require
5911                  * automatically retrying the command.  Therefore, the
5912                  * inquiry failed.  If we had inquiry information before
5913                  * for this device, but this latest inquiry command failed,
5914                  * the device has probably gone away.  If this device isn't
5915                  * already marked unconfigured, notify the peripheral
5916                  * drivers that this device is no more.
5917                  */
5918                 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
5919                         /* Send the async notification. */
5920                         xpt_async(AC_LOST_DEVICE, path, NULL);
5921
5922                 xpt_release_ccb(done_ccb);
5923                 break;
5924         }
5925         case PROBE_MODE_SENSE:
5926         {
5927                 struct ccb_scsiio *csio;
5928                 struct scsi_mode_header_6 *mode_hdr;
5929
5930                 csio = &done_ccb->csio;
5931                 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr;
5932                 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
5933                         struct scsi_control_page *page;
5934                         u_int8_t *offset;
5935
5936                         offset = ((u_int8_t *)&mode_hdr[1])
5937                             + mode_hdr->blk_desc_len;
5938                         page = (struct scsi_control_page *)offset;
5939                         path->device->queue_flags = page->queue_flags;
5940                 } else if (cam_periph_error(done_ccb, 0,
5941                                             SF_RETRY_UA|SF_NO_PRINT,
5942                                             &softc->saved_ccb) == ERESTART) {
5943                         return;
5944                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5945                         /* Don't wedge the queue */
5946                         xpt_release_devq(done_ccb->ccb_h.path,
5947                                          /*count*/1, /*run_queue*/TRUE);
5948                 }
5949                 xpt_release_ccb(done_ccb);
5950                 free(mode_hdr, M_TEMP);
5951                 softc->action = PROBE_SERIAL_NUM;
5952                 xpt_schedule(periph, priority);
5953                 return;
5954         }
5955         case PROBE_SERIAL_NUM:
5956         {
5957                 struct ccb_scsiio *csio;
5958                 struct scsi_vpd_unit_serial_number *serial_buf;
5959                 u_int32_t  priority;
5960                 int changed;
5961                 int have_serialnum;
5962
5963                 changed = 1;
5964                 have_serialnum = 0;
5965                 csio = &done_ccb->csio;
5966                 priority = done_ccb->ccb_h.pinfo.priority;
5967                 serial_buf =
5968                     (struct scsi_vpd_unit_serial_number *)csio->data_ptr;
5969
5970                 /* Clean up from previous instance of this device */
5971                 if (path->device->serial_num != NULL) {
5972                         free(path->device->serial_num, M_CAMXPT);
5973                         path->device->serial_num = NULL;
5974                         path->device->serial_num_len = 0;
5975                 }
5976
5977                 if (serial_buf == NULL) {
5978                         /*
5979                          * Don't process the command as it was never sent
5980                          */
5981                 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
5982                         && (serial_buf->length > 0)) {
5983
5984                         have_serialnum = 1;
5985                         path->device->serial_num =
5986                                 (u_int8_t *)malloc((serial_buf->length + 1),
5987                                                    M_CAMXPT, M_NOWAIT);
5988                         if (path->device->serial_num != NULL) {
5989                                 bcopy(serial_buf->serial_num,
5990                                       path->device->serial_num,
5991                                       serial_buf->length);
5992                                 path->device->serial_num_len =
5993                                     serial_buf->length;
5994                                 path->device->serial_num[serial_buf->length]
5995                                     = '\0';
5996                         }
5997                 } else if (cam_periph_error(done_ccb, 0,
5998                                             SF_RETRY_UA|SF_NO_PRINT,
5999                                             &softc->saved_ccb) == ERESTART) {
6000                         return;
6001                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6002                         /* Don't wedge the queue */
6003                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6004                                          /*run_queue*/TRUE);
6005                 }
6006
6007                 /*
6008                  * Let's see if we have seen this device before.
6009                  */
6010                 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) {
6011                         MD5_CTX context;
6012                         u_int8_t digest[16];
6013
6014                         MD5Init(&context);
6015
6016                         MD5Update(&context,
6017                                   (unsigned char *)&path->device->inq_data,
6018                                   sizeof(struct scsi_inquiry_data));
6019
6020                         if (have_serialnum)
6021                                 MD5Update(&context, serial_buf->serial_num,
6022                                           serial_buf->length);
6023
6024                         MD5Final(digest, &context);
6025                         if (bcmp(softc->digest, digest, 16) == 0)
6026                                 changed = 0;
6027
6028                         /*
6029                          * XXX Do we need to do a TUR in order to ensure
6030                          *     that the device really hasn't changed???
6031                          */
6032                         if ((changed != 0)
6033                          && ((softc->flags & PROBE_NO_ANNOUNCE) == 0))
6034                                 xpt_async(AC_LOST_DEVICE, path, NULL);
6035                 }
6036                 if (serial_buf != NULL)
6037                         free(serial_buf, M_TEMP);
6038
6039                 if (changed != 0) {
6040                         /*
6041                          * Now that we have all the necessary
6042                          * information to safely perform transfer
6043                          * negotiations... Controllers don't perform
6044                          * any negotiation or tagged queuing until
6045                          * after the first XPT_SET_TRAN_SETTINGS ccb is
6046                          * received.  So, on a new device, just retreive
6047                          * the user settings, and set them as the current
6048                          * settings to set the device up.
6049                          */
6050                         proberequestdefaultnegotiation(periph);
6051                         xpt_release_ccb(done_ccb);
6052
6053                         /*
6054                          * Perform a TUR to allow the controller to
6055                          * perform any necessary transfer negotiation.
6056                          */
6057                         softc->action = PROBE_TUR_FOR_NEGOTIATION;
6058                         xpt_schedule(periph, priority);
6059                         return;
6060                 }
6061                 xpt_release_ccb(done_ccb);
6062                 break;
6063         }
6064         case PROBE_TUR_FOR_NEGOTIATION:
6065                 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6066                         /* Don't wedge the queue */
6067                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6068                                          /*run_queue*/TRUE);
6069                 }
6070
6071                 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
6072
6073                 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) {
6074                         /* Inform the XPT that a new device has been found */
6075                         done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
6076                         xpt_action(done_ccb);
6077
6078                         xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path,
6079                                   done_ccb);
6080                 }
6081                 xpt_release_ccb(done_ccb);
6082                 break;
6083         }
6084         done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
6085         TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe);
6086         done_ccb->ccb_h.status = CAM_REQ_CMP;
6087         xpt_done(done_ccb);
6088         if (TAILQ_FIRST(&softc->request_ccbs) == NULL) {
6089                 cam_periph_invalidate(periph);
6090                 cam_periph_release(periph);
6091         } else {
6092                 probeschedule(periph);
6093         }
6094 }
6095
6096 static void
6097 probecleanup(struct cam_periph *periph)
6098 {
6099         free(periph->softc, M_TEMP);
6100 }
6101
6102 static void
6103 xpt_find_quirk(struct cam_ed *device)
6104 {
6105         caddr_t match;
6106
6107         match = cam_quirkmatch((caddr_t)&device->inq_data,
6108                                (caddr_t)xpt_quirk_table,
6109                                sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table),
6110                                sizeof(*xpt_quirk_table), scsi_inquiry_match);
6111
6112         if (match == NULL)
6113                 panic("xpt_find_quirk: device didn't match wildcard entry!!");
6114
6115         device->quirk = (struct xpt_quirk_entry *)match;
6116 }
6117
6118 #ifdef CAM_NEW_TRAN_CODE
6119
6120 static void
6121 xpt_devise_transport(struct cam_path *path)
6122 {
6123         struct ccb_pathinq cpi;
6124         struct ccb_trans_settings cts;
6125         struct scsi_inquiry_data *inq_buf;
6126
6127         /* Get transport information from the SIM */
6128         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
6129         cpi.ccb_h.func_code = XPT_PATH_INQ;
6130         xpt_action((union ccb *)&cpi);
6131
6132         inq_buf = NULL;
6133         if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0)
6134                 inq_buf = &path->device->inq_data;
6135         path->device->protocol = PROTO_SCSI;
6136         path->device->protocol_version =
6137             inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version;
6138         path->device->transport = cpi.transport;
6139         path->device->transport_version = cpi.transport_version;
6140
6141         /*
6142          * Any device not using SPI3 features should
6143          * be considered SPI2 or lower.
6144          */
6145         if (inq_buf != NULL) {
6146                 if (path->device->transport == XPORT_SPI
6147                  && (inq_buf->spi3data & SID_SPI_MASK) == 0
6148                  && path->device->transport_version > 2)
6149                         path->device->transport_version = 2;
6150         } else {
6151                 struct cam_ed* otherdev;
6152
6153                 for (otherdev = TAILQ_FIRST(&path->target->ed_entries);
6154                      otherdev != NULL;
6155                      otherdev = TAILQ_NEXT(otherdev, links)) {
6156                         if (otherdev != path->device)
6157                                 break;
6158                 }
6159
6160                 if (otherdev != NULL) {
6161                         /*
6162                          * Initially assume the same versioning as
6163                          * prior luns for this target.
6164                          */
6165                         path->device->protocol_version =
6166                             otherdev->protocol_version;
6167                         path->device->transport_version =
6168                             otherdev->transport_version;
6169                 } else {
6170                         /* Until we know better, opt for safty */
6171                         path->device->protocol_version = 2;
6172                         if (path->device->transport == XPORT_SPI)
6173                                 path->device->transport_version = 2;
6174                         else
6175                                 path->device->transport_version = 0;
6176                 }
6177         }
6178
6179         /*
6180          * XXX
6181          * For a device compliant with SPC-2 we should be able
6182          * to determine the transport version supported by
6183          * scrutinizing the version descriptors in the
6184          * inquiry buffer.
6185          */
6186
6187         /* Tell the controller what we think */
6188         xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
6189         cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
6190         cts.type = CTS_TYPE_CURRENT_SETTINGS;
6191         cts.transport = path->device->transport;
6192         cts.transport_version = path->device->transport_version;
6193         cts.protocol = path->device->protocol;
6194         cts.protocol_version = path->device->protocol_version;
6195         cts.proto_specific.valid = 0;
6196         cts.xport_specific.valid = 0;
6197         xpt_action((union ccb *)&cts);
6198 }
6199
6200 static void
6201 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device,
6202                           int async_update)
6203 {
6204         struct  ccb_pathinq cpi;
6205         struct  ccb_trans_settings cur_cts;
6206         struct  ccb_trans_settings_scsi *scsi;
6207         struct  ccb_trans_settings_scsi *cur_scsi;
6208         struct  cam_sim *sim;
6209         struct  scsi_inquiry_data *inq_data;
6210
6211         if (device == NULL) {
6212                 cts->ccb_h.status = CAM_PATH_INVALID;
6213                 xpt_done((union ccb *)cts);
6214                 return;
6215         }
6216
6217         if (cts->protocol == PROTO_UNKNOWN
6218          || cts->protocol == PROTO_UNSPECIFIED) {
6219                 cts->protocol = device->protocol;
6220                 cts->protocol_version = device->protocol_version;
6221         }
6222
6223         if (cts->protocol_version == PROTO_VERSION_UNKNOWN
6224          || cts->protocol_version == PROTO_VERSION_UNSPECIFIED)
6225                 cts->protocol_version = device->protocol_version;
6226
6227         if (cts->protocol != device->protocol) {
6228                 xpt_print_path(cts->ccb_h.path);
6229                 printf("Uninitialized Protocol %x:%x?\n",
6230                        cts->protocol, device->protocol);
6231                 cts->protocol = device->protocol;
6232         }
6233
6234         if (cts->protocol_version > device->protocol_version) {
6235                 if (bootverbose) {
6236                         xpt_print_path(cts->ccb_h.path);
6237                         printf("Down reving Protocol Version from %d to %d?\n",
6238                                cts->protocol_version, device->protocol_version);
6239                 }
6240                 cts->protocol_version = device->protocol_version;
6241         }
6242
6243         if (cts->transport == XPORT_UNKNOWN
6244          || cts->transport == XPORT_UNSPECIFIED) {
6245                 cts->transport = device->transport;
6246                 cts->transport_version = device->transport_version;
6247         }
6248
6249         if (cts->transport_version == XPORT_VERSION_UNKNOWN
6250          || cts->transport_version == XPORT_VERSION_UNSPECIFIED)
6251                 cts->transport_version = device->transport_version;
6252
6253         if (cts->transport != device->transport) {
6254                 xpt_print_path(cts->ccb_h.path);
6255                 printf("Uninitialized Transport %x:%x?\n",
6256                        cts->transport, device->transport);
6257                 cts->transport = device->transport;
6258         }
6259
6260         if (cts->transport_version > device->transport_version) {
6261                 if (bootverbose) {
6262                         xpt_print_path(cts->ccb_h.path);
6263                         printf("Down reving Transport Version from %d to %d?\n",
6264                                cts->transport_version,
6265                                device->transport_version);
6266                 }
6267                 cts->transport_version = device->transport_version;
6268         }
6269
6270         sim = cts->ccb_h.path->bus->sim;
6271
6272         /*
6273          * Nothing more of interest to do unless
6274          * this is a device connected via the
6275          * SCSI protocol.
6276          */
6277         if (cts->protocol != PROTO_SCSI) {
6278                 if (async_update == FALSE)
6279                         (*(sim->sim_action))(sim, (union ccb *)cts);
6280                 return;
6281         }
6282
6283         inq_data = &device->inq_data;
6284         scsi = &cts->proto_specific.scsi;
6285         xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1);
6286         cpi.ccb_h.func_code = XPT_PATH_INQ;
6287         xpt_action((union ccb *)&cpi);
6288
6289         /* SCSI specific sanity checking */
6290         if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0
6291          || (inq_data->flags & SID_CmdQue) == 0
6292          || (device->queue_flags & SCP_QUEUE_DQUE) != 0
6293          || (device->quirk->mintags == 0)) {
6294                 /*
6295                  * Can't tag on hardware that doesn't support tags,
6296                  * doesn't have it enabled, or has broken tag support.
6297                  */
6298                 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6299         }
6300
6301         if (async_update == FALSE) {
6302                 /*
6303                  * Perform sanity checking against what the
6304                  * controller and device can do.
6305                  */
6306                 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1);
6307                 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
6308                 cur_cts.type = cts->type;
6309                 xpt_action((union ccb *)&cur_cts);
6310
6311                 cur_scsi = &cur_cts.proto_specific.scsi;
6312                 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) {
6313                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6314                         scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB;
6315                 }
6316                 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0)
6317                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6318         }
6319
6320         /* SPI specific sanity checking */
6321         if (cts->transport == XPORT_SPI && async_update == FALSE) {
6322                 u_int spi3caps;
6323                 struct ccb_trans_settings_spi *spi;
6324                 struct ccb_trans_settings_spi *cur_spi;
6325
6326                 spi = &cts->xport_specific.spi;
6327
6328                 cur_spi = &cur_cts.xport_specific.spi;
6329
6330                 /* Fill in any gaps in what the user gave us */
6331                 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
6332                         spi->sync_period = cur_spi->sync_period;
6333                 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
6334                         spi->sync_period = 0;
6335                 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
6336                         spi->sync_offset = cur_spi->sync_offset;
6337                 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
6338                         spi->sync_offset = 0;
6339                 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
6340                         spi->ppr_options = cur_spi->ppr_options;
6341                 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
6342                         spi->ppr_options = 0;
6343                 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
6344                         spi->bus_width = cur_spi->bus_width;
6345                 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
6346                         spi->bus_width = 0;
6347                 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) {
6348                         spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
6349                         spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB;
6350                 }
6351                 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0)
6352                         spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
6353                 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6354                   && (inq_data->flags & SID_Sync) == 0
6355                   && cts->type == CTS_TYPE_CURRENT_SETTINGS)
6356                  || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)
6357                  || (cur_spi->sync_offset == 0)
6358                  || (cur_spi->sync_period == 0)) {
6359                         /* Force async */
6360                         spi->sync_period = 0;
6361                         spi->sync_offset = 0;
6362                 }
6363
6364                 switch (spi->bus_width) {
6365                 case MSG_EXT_WDTR_BUS_32_BIT:
6366                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6367                           || (inq_data->flags & SID_WBus32) != 0
6368                           || cts->type == CTS_TYPE_USER_SETTINGS)
6369                          && (cpi.hba_inquiry & PI_WIDE_32) != 0)
6370                                 break;
6371                         /* Fall Through to 16-bit */
6372                 case MSG_EXT_WDTR_BUS_16_BIT:
6373                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6374                           || (inq_data->flags & SID_WBus16) != 0
6375                           || cts->type == CTS_TYPE_USER_SETTINGS)
6376                          && (cpi.hba_inquiry & PI_WIDE_16) != 0) {
6377                                 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
6378                                 break;
6379                         }
6380                         /* Fall Through to 8-bit */
6381                 default: /* New bus width?? */
6382                 case MSG_EXT_WDTR_BUS_8_BIT:
6383                         /* All targets can do this */
6384                         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
6385                         break;
6386                 }
6387
6388                 spi3caps = cpi.xport_specific.spi.ppr_options;
6389                 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6390                  && cts->type == CTS_TYPE_CURRENT_SETTINGS)
6391                         spi3caps &= inq_data->spi3data;
6392
6393                 if ((spi3caps & SID_SPI_CLOCK_DT) == 0)
6394                         spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ;
6395
6396                 if ((spi3caps & SID_SPI_IUS) == 0)
6397                         spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ;
6398
6399                 if ((spi3caps & SID_SPI_QAS) == 0)
6400                         spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ;
6401
6402                 /* No SPI Transfer settings are allowed unless we are wide */
6403                 if (spi->bus_width == 0)
6404                         spi->ppr_options = 0;
6405
6406                 if ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0) {
6407                         /*
6408                          * Can't tag queue without disconnection.
6409                          */
6410                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6411                         scsi->valid |= CTS_SCSI_VALID_TQ;
6412                 }
6413
6414                 /*
6415                  * If we are currently performing tagged transactions to
6416                  * this device and want to change its negotiation parameters,
6417                  * go non-tagged for a bit to give the controller a chance to
6418                  * negotiate unhampered by tag messages.
6419                  */
6420                 if (cts->type == CTS_TYPE_CURRENT_SETTINGS
6421                  && (device->inq_flags & SID_CmdQue) != 0
6422                  && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
6423                  && (spi->flags & (CTS_SPI_VALID_SYNC_RATE|
6424                                    CTS_SPI_VALID_SYNC_OFFSET|
6425                                    CTS_SPI_VALID_BUS_WIDTH)) != 0)
6426                         xpt_toggle_tags(cts->ccb_h.path);
6427         }
6428
6429         if (cts->type == CTS_TYPE_CURRENT_SETTINGS
6430          && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) {
6431                 int device_tagenb;
6432
6433                 /*
6434                  * If we are transitioning from tags to no-tags or
6435                  * vice-versa, we need to carefully freeze and restart
6436                  * the queue so that we don't overlap tagged and non-tagged
6437                  * commands.  We also temporarily stop tags if there is
6438                  * a change in transfer negotiation settings to allow
6439                  * "tag-less" negotiation.
6440                  */
6441                 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6442                  || (device->inq_flags & SID_CmdQue) != 0)
6443                         device_tagenb = TRUE;
6444                 else
6445                         device_tagenb = FALSE;
6446
6447                 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
6448                   && device_tagenb == FALSE)
6449                  || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0
6450                   && device_tagenb == TRUE)) {
6451
6452                         if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) {
6453                                 /*
6454                                  * Delay change to use tags until after a
6455                                  * few commands have gone to this device so
6456                                  * the controller has time to perform transfer
6457                                  * negotiations without tagged messages getting
6458                                  * in the way.
6459                                  */
6460                                 device->tag_delay_count = CAM_TAG_DELAY_COUNT;
6461                                 device->flags |= CAM_DEV_TAG_AFTER_COUNT;
6462                         } else {
6463                                 struct ccb_relsim crs;
6464
6465                                 xpt_freeze_devq(cts->ccb_h.path, /*count*/1);
6466                                 device->inq_flags &= ~SID_CmdQue;
6467                                 xpt_dev_ccbq_resize(cts->ccb_h.path,
6468                                                     sim->max_dev_openings);
6469                                 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
6470                                 device->tag_delay_count = 0;
6471
6472                                 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path,
6473                                               /*priority*/1);
6474                                 crs.ccb_h.func_code = XPT_REL_SIMQ;
6475                                 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
6476                                 crs.openings
6477                                     = crs.release_timeout
6478                                     = crs.qfrozen_cnt
6479                                     = 0;
6480                                 xpt_action((union ccb *)&crs);
6481                         }
6482                 }
6483         }
6484         if (async_update == FALSE)
6485                 (*(sim->sim_action))(sim, (union ccb *)cts);
6486 }
6487
6488 #else /* CAM_NEW_TRAN_CODE */
6489
6490 static void
6491 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device,
6492                           int async_update)
6493 {
6494         struct  cam_sim *sim;
6495         int     qfrozen;
6496
6497         sim = cts->ccb_h.path->bus->sim;
6498         if (async_update == FALSE) {
6499                 struct  scsi_inquiry_data *inq_data;
6500                 struct  ccb_pathinq cpi;
6501                 struct  ccb_trans_settings cur_cts;
6502
6503                 if (device == NULL) {
6504                         cts->ccb_h.status = CAM_PATH_INVALID;
6505                         xpt_done((union ccb *)cts);
6506                         return;
6507                 }
6508
6509                 /*
6510                  * Perform sanity checking against what the
6511                  * controller and device can do.
6512                  */
6513                 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1);
6514                 cpi.ccb_h.func_code = XPT_PATH_INQ;
6515                 xpt_action((union ccb *)&cpi);
6516                 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1);
6517                 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
6518                 cur_cts.flags = CCB_TRANS_CURRENT_SETTINGS;
6519                 xpt_action((union ccb *)&cur_cts);
6520                 inq_data = &device->inq_data;
6521
6522                 /* Fill in any gaps in what the user gave us */
6523                 if ((cts->valid & CCB_TRANS_SYNC_RATE_VALID) == 0)
6524                         cts->sync_period = cur_cts.sync_period;
6525                 if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0)
6526                         cts->sync_offset = cur_cts.sync_offset;
6527                 if ((cts->valid & CCB_TRANS_BUS_WIDTH_VALID) == 0)
6528                         cts->bus_width = cur_cts.bus_width;
6529                 if ((cts->valid & CCB_TRANS_DISC_VALID) == 0) {
6530                         cts->flags &= ~CCB_TRANS_DISC_ENB;
6531                         cts->flags |= cur_cts.flags & CCB_TRANS_DISC_ENB;
6532                 }
6533                 if ((cts->valid & CCB_TRANS_TQ_VALID) == 0) {
6534                         cts->flags &= ~CCB_TRANS_TAG_ENB;
6535                         cts->flags |= cur_cts.flags & CCB_TRANS_TAG_ENB;
6536                 }
6537
6538                 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6539                   && (inq_data->flags & SID_Sync) == 0)
6540                  || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)
6541                  || (cts->sync_offset == 0)
6542                  || (cts->sync_period == 0)) {
6543                         /* Force async */
6544                         cts->sync_period = 0;
6545                         cts->sync_offset = 0;
6546                 } else if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6547                         && (inq_data->spi3data & SID_SPI_CLOCK_DT) == 0
6548                         && cts->sync_period <= 0x9) {
6549                         /*
6550                          * Don't allow DT transmission rates if the
6551                          * device does not support it.
6552                          */
6553                         cts->sync_period = 0xa;
6554                 }
6555
6556                 switch (cts->bus_width) {
6557                 case MSG_EXT_WDTR_BUS_32_BIT:
6558                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6559                           || (inq_data->flags & SID_WBus32) != 0)
6560                          && (cpi.hba_inquiry & PI_WIDE_32) != 0)
6561                                 break;
6562                         /* FALLTHROUGH to 16-bit */
6563                 case MSG_EXT_WDTR_BUS_16_BIT:
6564                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6565                           || (inq_data->flags & SID_WBus16) != 0)
6566                          && (cpi.hba_inquiry & PI_WIDE_16) != 0) {
6567                                 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
6568                                 break;
6569                         }
6570                         /* FALLTHROUGH to 8-bit */
6571                 default: /* New bus width?? */
6572                 case MSG_EXT_WDTR_BUS_8_BIT:
6573                         /* All targets can do this */
6574                         cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
6575                         break;
6576                 }
6577
6578                 if ((cts->flags & CCB_TRANS_DISC_ENB) == 0) {
6579                         /*
6580                          * Can't tag queue without disconnection.
6581                          */
6582                         cts->flags &= ~CCB_TRANS_TAG_ENB;
6583                         cts->valid |= CCB_TRANS_TQ_VALID;
6584                 }
6585
6586                 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0
6587                  || (inq_data->flags & SID_CmdQue) == 0
6588                  || (device->queue_flags & SCP_QUEUE_DQUE) != 0
6589                  || (device->quirk->mintags == 0)) {
6590                         /*
6591                          * Can't tag on hardware that doesn't support,
6592                          * doesn't have it enabled, or has broken tag support.
6593                          */
6594                         cts->flags &= ~CCB_TRANS_TAG_ENB;
6595                 }
6596         }
6597
6598         qfrozen = FALSE;
6599         if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) {
6600                 int device_tagenb;
6601
6602                 /*
6603                  * If we are transitioning from tags to no-tags or
6604                  * vice-versa, we need to carefully freeze and restart
6605                  * the queue so that we don't overlap tagged and non-tagged
6606                  * commands.  We also temporarily stop tags if there is
6607                  * a change in transfer negotiation settings to allow
6608                  * "tag-less" negotiation.
6609                  */
6610                 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6611                  || (device->inq_flags & SID_CmdQue) != 0)
6612                         device_tagenb = TRUE;
6613                 else
6614                         device_tagenb = FALSE;
6615
6616                 if (((cts->flags & CCB_TRANS_TAG_ENB) != 0
6617                   && device_tagenb == FALSE)
6618                  || ((cts->flags & CCB_TRANS_TAG_ENB) == 0
6619                   && device_tagenb == TRUE)) {
6620
6621                         if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) {
6622                                 /*
6623                                  * Delay change to use tags until after a
6624                                  * few commands have gone to this device so
6625                                  * the controller has time to perform transfer
6626                                  * negotiations without tagged messages getting
6627                                  * in the way.
6628                                  */
6629                                 device->tag_delay_count = CAM_TAG_DELAY_COUNT;
6630                                 device->flags |= CAM_DEV_TAG_AFTER_COUNT;
6631                         } else {
6632                                 xpt_freeze_devq(cts->ccb_h.path, /*count*/1);
6633                                 qfrozen = TRUE;
6634                                 device->inq_flags &= ~SID_CmdQue;
6635                                 xpt_dev_ccbq_resize(cts->ccb_h.path,
6636                                                     sim->max_dev_openings);
6637                                 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
6638                                 device->tag_delay_count = 0;
6639                         }
6640                 }
6641         }
6642
6643         if (async_update == FALSE) {
6644                 /*
6645                  * If we are currently performing tagged transactions to
6646                  * this device and want to change its negotiation parameters,
6647                  * go non-tagged for a bit to give the controller a chance to
6648                  * negotiate unhampered by tag messages.
6649                  */
6650                 if ((device->inq_flags & SID_CmdQue) != 0
6651                  && (cts->flags & (CCB_TRANS_SYNC_RATE_VALID|
6652                                    CCB_TRANS_SYNC_OFFSET_VALID|
6653                                    CCB_TRANS_BUS_WIDTH_VALID)) != 0)
6654                         xpt_toggle_tags(cts->ccb_h.path);
6655
6656                 (*(sim->sim_action))(sim, (union ccb *)cts);
6657         }
6658
6659         if (qfrozen) {
6660                 struct ccb_relsim crs;
6661
6662                 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path,
6663                               /*priority*/1);
6664                 crs.ccb_h.func_code = XPT_REL_SIMQ;
6665                 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
6666                 crs.openings
6667                     = crs.release_timeout
6668                     = crs.qfrozen_cnt
6669                     = 0;
6670                 xpt_action((union ccb *)&crs);
6671         }
6672 }
6673
6674
6675 #endif /* CAM_NEW_TRAN_CODE */
6676
6677 static void
6678 xpt_toggle_tags(struct cam_path *path)
6679 {
6680         struct cam_ed *dev;
6681
6682         /*
6683          * Give controllers a chance to renegotiate
6684          * before starting tag operations.  We
6685          * "toggle" tagged queuing off then on
6686          * which causes the tag enable command delay
6687          * counter to come into effect.
6688          */
6689         dev = path->device;
6690         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6691          || ((dev->inq_flags & SID_CmdQue) != 0
6692           && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) {
6693                 struct ccb_trans_settings cts;
6694
6695                 xpt_setup_ccb(&cts.ccb_h, path, 1);
6696 #ifdef CAM_NEW_TRAN_CODE
6697                 cts.protocol = PROTO_SCSI;
6698                 cts.protocol_version = PROTO_VERSION_UNSPECIFIED;
6699                 cts.transport = XPORT_UNSPECIFIED;
6700                 cts.transport_version = XPORT_VERSION_UNSPECIFIED;
6701                 cts.proto_specific.scsi.flags = 0;
6702                 cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ;
6703 #else /* CAM_NEW_TRAN_CODE */
6704                 cts.flags = 0;
6705                 cts.valid = CCB_TRANS_TQ_VALID;
6706 #endif /* CAM_NEW_TRAN_CODE */
6707                 xpt_set_transfer_settings(&cts, path->device,
6708                                           /*async_update*/TRUE);
6709 #ifdef CAM_NEW_TRAN_CODE
6710                 cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB;
6711 #else /* CAM_NEW_TRAN_CODE */
6712                 cts.flags = CCB_TRANS_TAG_ENB;
6713 #endif /* CAM_NEW_TRAN_CODE */
6714                 xpt_set_transfer_settings(&cts, path->device,
6715                                           /*async_update*/TRUE);
6716         }
6717 }
6718
6719 static void
6720 xpt_start_tags(struct cam_path *path)
6721 {
6722         struct ccb_relsim crs;
6723         struct cam_ed *device;
6724         struct cam_sim *sim;
6725         int    newopenings;
6726
6727         device = path->device;
6728         sim = path->bus->sim;
6729         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
6730         xpt_freeze_devq(path, /*count*/1);
6731         device->inq_flags |= SID_CmdQue;
6732         if (device->tag_saved_openings != 0)
6733                 newopenings = device->tag_saved_openings;
6734         else
6735                 newopenings = min(device->quirk->maxtags,
6736                                   sim->max_tagged_dev_openings);
6737         xpt_dev_ccbq_resize(path, newopenings);
6738         xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1);
6739         crs.ccb_h.func_code = XPT_REL_SIMQ;
6740         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
6741         crs.openings
6742             = crs.release_timeout
6743             = crs.qfrozen_cnt
6744             = 0;
6745         xpt_action((union ccb *)&crs);
6746 }
6747
6748 static int busses_to_config;
6749 static int busses_to_reset;
6750
6751 static int
6752 xptconfigbuscountfunc(struct cam_eb *bus, void *arg)
6753 {
6754         if (bus->path_id != CAM_XPT_PATH_ID) {
6755                 struct cam_path path;
6756                 struct ccb_pathinq cpi;
6757                 int can_negotiate;
6758
6759                 busses_to_config++;
6760                 xpt_compile_path(&path, NULL, bus->path_id,
6761                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
6762                 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
6763                 cpi.ccb_h.func_code = XPT_PATH_INQ;
6764                 xpt_action((union ccb *)&cpi);
6765                 can_negotiate = cpi.hba_inquiry;
6766                 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
6767                 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0
6768                  && can_negotiate)
6769                         busses_to_reset++;
6770                 xpt_release_path(&path);
6771         }
6772
6773         return(1);
6774 }
6775
6776 static int
6777 xptconfigfunc(struct cam_eb *bus, void *arg)
6778 {
6779         struct  cam_path *path;
6780         union   ccb *work_ccb;
6781
6782         if (bus->path_id != CAM_XPT_PATH_ID) {
6783                 cam_status status;
6784                 int can_negotiate;
6785
6786                 work_ccb = xpt_alloc_ccb();
6787                 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id,
6788                                               CAM_TARGET_WILDCARD,
6789                                               CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){
6790                         printf("xptconfigfunc: xpt_create_path failed with "
6791                                "status %#x for bus %d\n", status, bus->path_id);
6792                         printf("xptconfigfunc: halting bus configuration\n");
6793                         xpt_free_ccb(work_ccb);
6794                         busses_to_config--;
6795                         xpt_finishconfig(xpt_periph, NULL);
6796                         return(0);
6797                 }
6798                 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
6799                 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
6800                 xpt_action(work_ccb);
6801                 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
6802                         printf("xptconfigfunc: CPI failed on bus %d "
6803                                "with status %d\n", bus->path_id,
6804                                work_ccb->ccb_h.status);
6805                         xpt_finishconfig(xpt_periph, work_ccb);
6806                         return(1);
6807                 }
6808
6809                 can_negotiate = work_ccb->cpi.hba_inquiry;
6810                 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
6811                 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0
6812                  && (can_negotiate != 0)) {
6813                         xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
6814                         work_ccb->ccb_h.func_code = XPT_RESET_BUS;
6815                         work_ccb->ccb_h.cbfcnp = NULL;
6816                         CAM_DEBUG(path, CAM_DEBUG_SUBTRACE,
6817                                   ("Resetting Bus\n"));
6818                         xpt_action(work_ccb);
6819                         xpt_finishconfig(xpt_periph, work_ccb);
6820                 } else {
6821                         /* Act as though we performed a successful BUS RESET */
6822                         work_ccb->ccb_h.func_code = XPT_RESET_BUS;
6823                         xpt_finishconfig(xpt_periph, work_ccb);
6824                 }
6825         }
6826
6827         return(1);
6828 }
6829
6830 static void
6831 xpt_config(void *arg)
6832 {
6833         /*
6834          * Now that interrupts are enabled, go find our devices
6835          */
6836
6837 #ifdef CAMDEBUG
6838         /* Setup debugging flags and path */
6839 #ifdef CAM_DEBUG_FLAGS
6840         cam_dflags = CAM_DEBUG_FLAGS;
6841 #else /* !CAM_DEBUG_FLAGS */
6842         cam_dflags = CAM_DEBUG_NONE;
6843 #endif /* CAM_DEBUG_FLAGS */
6844 #ifdef CAM_DEBUG_BUS
6845         if (cam_dflags != CAM_DEBUG_NONE) {
6846                 if (xpt_create_path(&cam_dpath, xpt_periph,
6847                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
6848                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
6849                         printf("xpt_config: xpt_create_path() failed for debug"
6850                                " target %d:%d:%d, debugging disabled\n",
6851                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
6852                         cam_dflags = CAM_DEBUG_NONE;
6853                 }
6854         } else
6855                 cam_dpath = NULL;
6856 #else /* !CAM_DEBUG_BUS */
6857         cam_dpath = NULL;
6858 #endif /* CAM_DEBUG_BUS */
6859 #endif /* CAMDEBUG */
6860
6861         /*
6862          * Scan all installed busses.
6863          */
6864         xpt_for_all_busses(xptconfigbuscountfunc, NULL);
6865
6866         if (busses_to_config == 0) {
6867                 /* Call manually because we don't have any busses */
6868                 xpt_finishconfig(xpt_periph, NULL);
6869         } else  {
6870                 if (busses_to_reset > 0 && scsi_delay >= 2000) {
6871                         printf("Waiting %d seconds for SCSI "
6872                                "devices to settle\n", scsi_delay/1000);
6873                 }
6874                 xpt_for_all_busses(xptconfigfunc, NULL);
6875         }
6876 }
6877
6878 /*
6879  * If the given device only has one peripheral attached to it, and if that
6880  * peripheral is the passthrough driver, announce it.  This insures that the
6881  * user sees some sort of announcement for every peripheral in their system.
6882  */
6883 static int
6884 xptpassannouncefunc(struct cam_ed *device, void *arg)
6885 {
6886         struct cam_periph *periph;
6887         int i;
6888
6889         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
6890              periph = SLIST_NEXT(periph, periph_links), i++);
6891
6892         periph = SLIST_FIRST(&device->periphs);
6893         if ((i == 1)
6894          && (strncmp(periph->periph_name, "pass", 4) == 0))
6895                 xpt_announce_periph(periph, NULL);
6896
6897         return(1);
6898 }
6899
6900 static void
6901 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb)
6902 {
6903         struct  periph_driver **p_drv;
6904         int     i;
6905
6906         if (done_ccb != NULL) {
6907                 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
6908                           ("xpt_finishconfig\n"));
6909                 switch(done_ccb->ccb_h.func_code) {
6910                 case XPT_RESET_BUS:
6911                         if (done_ccb->ccb_h.status == CAM_REQ_CMP) {
6912                                 done_ccb->ccb_h.func_code = XPT_SCAN_BUS;
6913                                 done_ccb->ccb_h.cbfcnp = xpt_finishconfig;
6914                                 done_ccb->crcn.flags = 0;
6915                                 xpt_action(done_ccb);
6916                                 return;
6917                         }
6918                         /* FALLTHROUGH */
6919                 case XPT_SCAN_BUS:
6920                 default:
6921                         xpt_free_path(done_ccb->ccb_h.path);
6922                         busses_to_config--;
6923                         break;
6924                 }
6925         }
6926
6927         if (busses_to_config == 0) {
6928                 /* Register all the peripheral drivers */
6929                 /* XXX This will have to change when we have loadable modules */
6930                 p_drv = periph_drivers;
6931                 for (i = 0; p_drv[i] != NULL; i++) {
6932                         (*p_drv[i]->init)();
6933                 }
6934
6935                 /*
6936                  * Check for devices with no "standard" peripheral driver
6937                  * attached.  For any devices like that, announce the
6938                  * passthrough driver so the user will see something.
6939                  */
6940                 xpt_for_all_devices(xptpassannouncefunc, NULL);
6941
6942                 /* Release our hook so that the boot can continue. */
6943                 config_intrhook_disestablish(xpt_config_hook);
6944                 free(xpt_config_hook, M_TEMP);
6945                 xpt_config_hook = NULL;
6946         }
6947         if (done_ccb != NULL)
6948                 xpt_free_ccb(done_ccb);
6949 }
6950
6951 static void
6952 xptaction(struct cam_sim *sim, union ccb *work_ccb)
6953 {
6954         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
6955
6956         switch (work_ccb->ccb_h.func_code) {
6957         /* Common cases first */
6958         case XPT_PATH_INQ:              /* Path routing inquiry */
6959         {
6960                 struct ccb_pathinq *cpi;
6961
6962                 cpi = &work_ccb->cpi;
6963                 cpi->version_num = 1; /* XXX??? */
6964                 cpi->hba_inquiry = 0;
6965                 cpi->target_sprt = 0;
6966                 cpi->hba_misc = 0;
6967                 cpi->hba_eng_cnt = 0;
6968                 cpi->max_target = 0;
6969                 cpi->max_lun = 0;
6970                 cpi->initiator_id = 0;
6971                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
6972                 strncpy(cpi->hba_vid, "", HBA_IDLEN);
6973                 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
6974                 cpi->unit_number = sim->unit_number;
6975                 cpi->bus_id = sim->bus_id;
6976                 cpi->base_transfer_speed = 0;
6977 #ifdef CAM_NEW_TRAN_CODE
6978                 cpi->protocol = PROTO_UNSPECIFIED;
6979                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
6980                 cpi->transport = XPORT_UNSPECIFIED;
6981                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
6982 #endif /* CAM_NEW_TRAN_CODE */
6983                 cpi->ccb_h.status = CAM_REQ_CMP;
6984                 xpt_done(work_ccb);
6985                 break;
6986         }
6987         default:
6988                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
6989                 xpt_done(work_ccb);
6990                 break;
6991         }
6992 }
6993
6994 /*
6995  * The xpt as a "controller" has no interrupt sources, so polling
6996  * is a no-op.
6997  */
6998 static void
6999 xptpoll(struct cam_sim *sim)
7000 {
7001 }
7002
7003 static void
7004 camisr(void *V_queue)
7005 {
7006         cam_isrq_t *oqueue = V_queue;
7007         cam_isrq_t queue;
7008         int     s;
7009         struct  ccb_hdr *ccb_h;
7010
7011         /*
7012          * Transfer the ccb_bioq list to a temporary list so we can operate
7013          * on it without needing to lock/unlock on every loop.  The concat
7014          * function with re-init the real list for us.
7015          */
7016         s = splcam();
7017         mtx_lock(&cam_bioq_lock);
7018         TAILQ_INIT(&queue);
7019         TAILQ_CONCAT(&queue, oqueue, sim_links.tqe);
7020         mtx_unlock(&cam_bioq_lock);
7021
7022         while ((ccb_h = TAILQ_FIRST(&queue)) != NULL) {
7023                 int     runq;
7024
7025                 TAILQ_REMOVE(&queue, ccb_h, sim_links.tqe);
7026                 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
7027                 splx(s);
7028
7029                 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE,
7030                           ("camisr\n"));
7031
7032                 runq = FALSE;
7033
7034                 if (ccb_h->flags & CAM_HIGH_POWER) {
7035                         struct highpowerlist    *hphead;
7036                         union ccb               *send_ccb;
7037
7038                         hphead = &highpowerq;
7039
7040                         send_ccb = (union ccb *)STAILQ_FIRST(hphead);
7041
7042                         /*
7043                          * Increment the count since this command is done.
7044                          */
7045                         num_highpower++;
7046
7047                         /*
7048                          * Any high powered commands queued up?
7049                          */
7050                         if (send_ccb != NULL) {
7051
7052                                 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe);
7053
7054                                 xpt_release_devq(send_ccb->ccb_h.path,
7055                                                  /*count*/1, /*runqueue*/TRUE);
7056                         }
7057                 }
7058                 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
7059                         struct cam_ed *dev;
7060
7061                         dev = ccb_h->path->device;
7062
7063                         s = splcam();
7064                         cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
7065
7066                         ccb_h->path->bus->sim->devq->send_active--;
7067                         ccb_h->path->bus->sim->devq->send_openings++;
7068                         splx(s);
7069
7070                         if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
7071                           && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)
7072                          || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
7073                           && (dev->ccbq.dev_active == 0))) {
7074
7075                                 xpt_release_devq(ccb_h->path, /*count*/1,
7076                                                  /*run_queue*/TRUE);
7077                         }
7078
7079                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
7080                          && (--dev->tag_delay_count == 0))
7081                                 xpt_start_tags(ccb_h->path);
7082
7083                         if ((dev->ccbq.queue.entries > 0)
7084                          && (dev->qfrozen_cnt == 0)
7085                          && (device_is_send_queued(dev) == 0)) {
7086                                 runq = xpt_schedule_dev_sendq(ccb_h->path->bus,
7087                                                               dev);
7088                         }
7089                 }
7090
7091                 if (ccb_h->status & CAM_RELEASE_SIMQ) {
7092                         xpt_release_simq(ccb_h->path->bus->sim,
7093                                          /*run_queue*/TRUE);
7094                         ccb_h->status &= ~CAM_RELEASE_SIMQ;
7095                         runq = FALSE;
7096                 }
7097
7098                 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
7099                  && (ccb_h->status & CAM_DEV_QFRZN)) {
7100                         xpt_release_devq(ccb_h->path, /*count*/1,
7101                                          /*run_queue*/TRUE);
7102                         ccb_h->status &= ~CAM_DEV_QFRZN;
7103                 } else if (runq) {
7104                         xpt_run_dev_sendq(ccb_h->path->bus);
7105                 }
7106
7107                 /* Call the peripheral driver's callback */
7108                 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
7109
7110                 /* Raise IPL for while test */
7111                 s = splcam();
7112         }
7113         splx(s);
7114 }