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 #include <sys/taskqueue.h>
  46
  47 #include <sys/lock.h>
  48 #include <sys/mutex.h>
  49 #include <sys/sysctl.h>
  50 #include <sys/kthread.h>
  51
  52 #ifdef PC98
  53 #include <pc98/pc98/pc98_machdep.h>     /* geometry translation */
  54 #endif
  55
  56 #include <cam/cam.h>
  57 #include <cam/cam_ccb.h>
  58 #include <cam/cam_periph.h>
  59 #include <cam/cam_sim.h>
  60 #include <cam/cam_xpt.h>
  61 #include <cam/cam_xpt_sim.h>
  62 #include <cam/cam_xpt_periph.h>
  63 #include <cam/cam_debug.h>
  64
  65 #include <cam/scsi/scsi_all.h>
  66 #include <cam/scsi/scsi_message.h>
  67 #include <cam/scsi/scsi_pass.h>
  68 #include <machine/stdarg.h>     /* for xpt_print below */
  69 #include "opt_cam.h"
  70
  71 /* Datastructures internal to the xpt layer */
  72 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
  73
  74 /* Object for defering XPT actions to a taskqueue */
  75 struct xpt_task {
  76         struct task     task;
  77         void            *data1;
  78         uintptr_t       data2;
  79 };
  80
  81 /*
  82  * Definition of an async handler callback block.  These are used to add
  83  * SIMs and peripherals to the async callback lists.
  84  */
  85 struct async_node {
  86         SLIST_ENTRY(async_node) links;
  87         u_int32_t       event_enable;   /* Async Event enables */
  88         void            (*callback)(void *arg, u_int32_t code,
  89                                     struct cam_path *path, void *args);
  90         void            *callback_arg;
  91 };
  92
  93 SLIST_HEAD(async_list, async_node);
  94 SLIST_HEAD(periph_list, cam_periph);
  95
  96 /*
  97  * This is the maximum number of high powered commands (e.g. start unit)
  98  * that can be outstanding at a particular time.
  99  */
 100 #ifndef CAM_MAX_HIGHPOWER
 101 #define CAM_MAX_HIGHPOWER  4
 102 #endif
 103
 104 /*
 105  * Structure for queueing a device in a run queue.
 106  * There is one run queue for allocating new ccbs,
 107  * and another for sending ccbs to the controller.
 108  */
 109 struct cam_ed_qinfo {
 110         cam_pinfo pinfo;
 111         struct    cam_ed *device;
 112 };
 113
 114 /*
 115  * The CAM EDT (Existing Device Table) contains the device information for
 116  * all devices for all busses in the system.  The table contains a
 117  * cam_ed structure for each device on the bus.
 118  */
 119 struct cam_ed {
 120         TAILQ_ENTRY(cam_ed) links;
 121         struct  cam_ed_qinfo alloc_ccb_entry;
 122         struct  cam_ed_qinfo send_ccb_entry;
 123         struct  cam_et   *target;
 124         struct  cam_sim  *sim;
 125         lun_id_t         lun_id;
 126         struct  camq drvq;              /*
 127                                          * Queue of type drivers wanting to do
 128                                          * work on this device.
 129                                          */
 130         struct  cam_ccbq ccbq;          /* Queue of pending ccbs */
 131         struct  async_list asyncs;      /* Async callback info for this B/T/L */
 132         struct  periph_list periphs;    /* All attached devices */
 133         u_int   generation;             /* Generation number */
 134         struct  cam_periph *owner;      /* Peripheral driver's ownership tag */
 135         struct  xpt_quirk_entry *quirk; /* Oddities about this device */
 136                                         /* Storage for the inquiry data */
 137         cam_proto        protocol;
 138         u_int            protocol_version;
 139         cam_xport        transport;
 140         u_int            transport_version;
 141         struct           scsi_inquiry_data inq_data;
 142         u_int8_t         inq_flags;     /*
 143                                          * Current settings for inquiry flags.
 144                                          * This allows us to override settings
 145                                          * like disconnection and tagged
 146                                          * queuing for a device.
 147                                          */
 148         u_int8_t         queue_flags;   /* Queue flags from the control page */
 149         u_int8_t         serial_num_len;
 150         u_int8_t        *serial_num;
 151         u_int32_t        qfrozen_cnt;
 152         u_int32_t        flags;
 153 #define CAM_DEV_UNCONFIGURED            0x01
 154 #define CAM_DEV_REL_TIMEOUT_PENDING     0x02
 155 #define CAM_DEV_REL_ON_COMPLETE         0x04
 156 #define CAM_DEV_REL_ON_QUEUE_EMPTY      0x08
 157 #define CAM_DEV_RESIZE_QUEUE_NEEDED     0x10
 158 #define CAM_DEV_TAG_AFTER_COUNT         0x20
 159 #define CAM_DEV_INQUIRY_DATA_VALID      0x40
 160 #define CAM_DEV_IN_DV                   0x80
 161 #define CAM_DEV_DV_HIT_BOTTOM           0x100
 162         u_int32_t        tag_delay_count;
 163 #define CAM_TAG_DELAY_COUNT             5
 164         u_int32_t        tag_saved_openings;
 165         u_int32_t        refcount;
 166         struct callout   callout;
 167 };
 168
 169 /*
 170  * Each target is represented by an ET (Existing Target).  These
 171  * entries are created when a target is successfully probed with an
 172  * identify, and removed when a device fails to respond after a number
 173  * of retries, or a bus rescan finds the device missing.
 174  */
 175 struct cam_et {
 176         TAILQ_HEAD(, cam_ed) ed_entries;
 177         TAILQ_ENTRY(cam_et) links;
 178         struct  cam_eb  *bus;
 179         target_id_t     target_id;
 180         u_int32_t       refcount;
 181         u_int           generation;
 182         struct          timeval last_reset;
 183 };
 184
 185 /*
 186  * Each bus is represented by an EB (Existing Bus).  These entries
 187  * are created by calls to xpt_bus_register and deleted by calls to
 188  * xpt_bus_deregister.
 189  */
 190 struct cam_eb {
 191         TAILQ_HEAD(, cam_et) et_entries;
 192         TAILQ_ENTRY(cam_eb)  links;
 193         path_id_t            path_id;
 194         struct cam_sim       *sim;
 195         struct timeval       last_reset;
 196         u_int32_t            flags;
 197 #define CAM_EB_RUNQ_SCHEDULED   0x01
 198         u_int32_t            refcount;
 199         u_int                generation;
 200 };
 201
 202 struct cam_path {
 203         struct cam_periph *periph;
 204         struct cam_eb     *bus;
 205         struct cam_et     *target;
 206         struct cam_ed     *device;
 207 };
 208
 209 struct xpt_quirk_entry {
 210         struct scsi_inquiry_pattern inq_pat;
 211         u_int8_t quirks;
 212 #define CAM_QUIRK_NOLUNS        0x01
 213 #define CAM_QUIRK_NOSERIAL      0x02
 214 #define CAM_QUIRK_HILUNS        0x04
 215 #define CAM_QUIRK_NOHILUNS      0x08
 216         u_int mintags;
 217         u_int maxtags;
 218 };
 219
 220 static int cam_srch_hi = 0;
 221 TUNABLE_INT("kern.cam.cam_srch_hi", &cam_srch_hi);
 222 static int sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS);
 223 SYSCTL_PROC(_kern_cam, OID_AUTO, cam_srch_hi, CTLTYPE_INT|CTLFLAG_RW, 0, 0,
 224     sysctl_cam_search_luns, "I",
 225     "allow search above LUN 7 for SCSI3 and greater devices");
 226
 227 #define CAM_SCSI2_MAXLUN        8
 228 /*
 229  * If we're not quirked to search <= the first 8 luns
 230  * and we are either quirked to search above lun 8,
 231  * or we're > SCSI-2 and we've enabled hilun searching,
 232  * or we're > SCSI-2 and the last lun was a success,
 233  * we can look for luns above lun 8.
 234  */
 235 #define CAN_SRCH_HI_SPARSE(dv)                          \
 236   (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0)      \
 237   && ((dv->quirk->quirks & CAM_QUIRK_HILUNS)            \
 238   || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2 && cam_srch_hi)))
 239
 240 #define CAN_SRCH_HI_DENSE(dv)                           \
 241   (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0)      \
 242   && ((dv->quirk->quirks & CAM_QUIRK_HILUNS)            \
 243   || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2)))
 244
 245 typedef enum {
 246         XPT_FLAG_OPEN           = 0x01
 247 } xpt_flags;
 248
 249 struct xpt_softc {
 250         xpt_flags               flags;
 251         u_int32_t               xpt_generation;
 252
 253         /* number of high powered commands that can go through right now */
 254         STAILQ_HEAD(highpowerlist, ccb_hdr)     highpowerq;
 255         int                     num_highpower;
 256
 257         /* queue for handling async rescan requests. */
 258         TAILQ_HEAD(, ccb_hdr) ccb_scanq;
 259
 260         /* Registered busses */
 261         TAILQ_HEAD(,cam_eb)     xpt_busses;
 262         u_int                   bus_generation;
 263
 264         struct intr_config_hook *xpt_config_hook;
 265
 266         struct mtx              xpt_topo_lock;
 267         struct mtx              xpt_lock;
 268 };
 269
 270 static const char quantum[] = "QUANTUM";
 271 static const char sony[] = "SONY";
 272 static const char west_digital[] = "WDIGTL";
 273 static const char samsung[] = "SAMSUNG";
 274 static const char seagate[] = "SEAGATE";
 275 static const char microp[] = "MICROP";
 276
 277 static struct xpt_quirk_entry xpt_quirk_table[] =
 278 {
 279         {
 280                 /* Reports QUEUE FULL for temporary resource shortages */
 281                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" },
 282                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 283         },
 284         {
 285                 /* Reports QUEUE FULL for temporary resource shortages */
 286                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" },
 287                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 288         },
 289         {
 290                 /* Reports QUEUE FULL for temporary resource shortages */
 291                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" },
 292                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 293         },
 294         {
 295                 /* Broken tagged queuing drive */
 296                 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" },
 297                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 298         },
 299         {
 300                 /* Broken tagged queuing drive */
 301                 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" },
 302                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 303         },
 304         {
 305                 /* Broken tagged queuing drive */
 306                 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" },
 307                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 308         },
 309         {
 310                 /*
 311                  * Unfortunately, the Quantum Atlas III has the same
 312                  * problem as the Atlas II drives above.
 313                  * Reported by: "Johan Granlund" <johan@granlund.nu>
 314                  *
 315                  * For future reference, the drive with the problem was:
 316                  * QUANTUM QM39100TD-SW N1B0
 317                  *
 318                  * It's possible that Quantum will fix the problem in later
 319                  * firmware revisions.  If that happens, the quirk entry
 320                  * will need to be made specific to the firmware revisions
 321                  * with the problem.
 322                  *
 323                  */
 324                 /* Reports QUEUE FULL for temporary resource shortages */
 325                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" },
 326                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 327         },
 328         {
 329                 /*
 330                  * 18 Gig Atlas III, same problem as the 9G version.
 331                  * Reported by: Andre Albsmeier
 332                  *              <andre.albsmeier@mchp.siemens.de>
 333                  *
 334                  * For future reference, the drive with the problem was:
 335                  * QUANTUM QM318000TD-S N491
 336                  */
 337                 /* Reports QUEUE FULL for temporary resource shortages */
 338                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" },
 339                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 340         },
 341         {
 342                 /*
 343                  * Broken tagged queuing drive
 344                  * Reported by: Bret Ford <bford@uop.cs.uop.edu>
 345                  *         and: Martin Renters <martin@tdc.on.ca>
 346                  */
 347                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" },
 348                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 349         },
 350                 /*
 351                  * The Seagate Medalist Pro drives have very poor write
 352                  * performance with anything more than 2 tags.
 353                  *
 354                  * Reported by:  Paul van der Zwan <paulz@trantor.xs4all.nl>
 355                  * Drive:  <SEAGATE ST36530N 1444>
 356                  *
 357                  * Reported by:  Jeremy Lea <reg@shale.csir.co.za>
 358                  * Drive:  <SEAGATE ST34520W 1281>
 359                  *
 360                  * No one has actually reported that the 9G version
 361                  * (ST39140*) of the Medalist Pro has the same problem, but
 362                  * we're assuming that it does because the 4G and 6.5G
 363                  * versions of the drive are broken.
 364                  */
 365         {
 366                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"},
 367                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 368         },
 369         {
 370                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"},
 371                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 372         },
 373         {
 374                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"},
 375                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 376         },
 377         {
 378                 /*
 379                  * Slow when tagged queueing is enabled.  Write performance
 380                  * steadily drops off with more and more concurrent
 381                  * transactions.  Best sequential write performance with
 382                  * tagged queueing turned off and write caching turned on.
 383                  *
 384                  * PR:  kern/10398
 385                  * Submitted by:  Hideaki Okada <hokada@isl.melco.co.jp>
 386                  * Drive:  DCAS-34330 w/ "S65A" firmware.
 387                  *
 388                  * The drive with the problem had the "S65A" firmware
 389                  * revision, and has also been reported (by Stephen J.
 390                  * Roznowski <sjr@home.net>) for a drive with the "S61A"
 391                  * firmware revision.
 392                  *
 393                  * Although no one has reported problems with the 2 gig
 394                  * version of the DCAS drive, the assumption is that it
 395                  * has the same problems as the 4 gig version.  Therefore
 396                  * this quirk entries disables tagged queueing for all
 397                  * DCAS drives.
 398                  */
 399                 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" },
 400                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 401         },
 402         {
 403                 /* Broken tagged queuing drive */
 404                 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" },
 405                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 406         },
 407         {
 408                 /* Broken tagged queuing drive */
 409                 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" },
 410                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 411         },
 412         {
 413                 /* This does not support other than LUN 0 */
 414                 { T_DIRECT, SIP_MEDIA_FIXED, "VMware*", "*", "*" },
 415                 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
 416         },
 417         {
 418                 /*
 419                  * Broken tagged queuing drive.
 420                  * Submitted by:
 421                  * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp>
 422                  * in PR kern/9535
 423                  */
 424                 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" },
 425                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 426         },
 427         {
 428                 /*
 429                  * Slow when tagged queueing is enabled. (1.5MB/sec versus
 430                  * 8MB/sec.)
 431                  * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
 432                  * Best performance with these drives is achieved with
 433                  * tagged queueing turned off, and write caching turned on.
 434                  */
 435                 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" },
 436                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 437         },
 438         {
 439                 /*
 440                  * Slow when tagged queueing is enabled. (1.5MB/sec versus
 441                  * 8MB/sec.)
 442                  * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
 443                  * Best performance with these drives is achieved with
 444                  * tagged queueing turned off, and write caching turned on.
 445                  */
 446                 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" },
 447                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 448         },
 449         {
 450                 /*
 451                  * Doesn't handle queue full condition correctly,
 452                  * so we need to limit maxtags to what the device
 453                  * can handle instead of determining this automatically.
 454                  */
 455                 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" },
 456                 /*quirks*/0, /*mintags*/2, /*maxtags*/32
 457         },
 458         {
 459                 /* Really only one LUN */
 460                 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" },
 461                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 462         },
 463         {
 464                 /* I can't believe we need a quirk for DPT volumes. */
 465                 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" },
 466                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS,
 467                 /*mintags*/0, /*maxtags*/255
 468         },
 469         {
 470                 /*
 471                  * Many Sony CDROM drives don't like multi-LUN probing.
 472                  */
 473                 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" },
 474                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 475         },
 476         {
 477                 /*
 478                  * This drive doesn't like multiple LUN probing.
 479                  * Submitted by:  Parag Patel <parag@cgt.com>
 480                  */
 481                 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R   CDU9*", "*" },
 482                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 483         },
 484         {
 485                 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" },
 486                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 487         },
 488         {
 489                 /*
 490                  * The 8200 doesn't like multi-lun probing, and probably
 491                  * don't like serial number requests either.
 492                  */
 493                 {
 494                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
 495                         "EXB-8200*", "*"
 496                 },
 497                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 498         },
 499         {
 500                 /*
 501                  * Let's try the same as above, but for a drive that says
 502                  * it's an IPL-6860 but is actually an EXB 8200.
 503                  */
 504                 {
 505                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
 506                         "IPL-6860*", "*"
 507                 },
 508                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 509         },
 510         {
 511                 /*
 512                  * These Hitachi drives don't like multi-lun probing.
 513                  * The PR submitter has a DK319H, but says that the Linux
 514                  * kernel has a similar work-around for the DK312 and DK314,
 515                  * so all DK31* drives are quirked here.
 516                  * PR:            misc/18793
 517                  * Submitted by:  Paul Haddad <paul@pth.com>
 518                  */
 519                 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" },
 520                 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
 521         },
 522         {
 523                 /*
 524                  * The Hitachi CJ series with J8A8 firmware apparantly has
 525                  * problems with tagged commands.
 526                  * PR: 23536
 527                  * Reported by: amagai@nue.org
 528                  */
 529                 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK32CJ*", "J8A8" },
 530                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 531         },
 532         {
 533                 /*
 534                  * These are the large storage arrays.
 535                  * Submitted by:  William Carrel <william.carrel@infospace.com>
 536                  */
 537                 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "OPEN*", "*" },
 538                 CAM_QUIRK_HILUNS, 2, 1024
 539         },
 540         {
 541                 /*
 542                  * This old revision of the TDC3600 is also SCSI-1, and
 543                  * hangs upon serial number probing.
 544                  */
 545                 {
 546                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 547                         " TDC 3600", "U07:"
 548                 },
 549                 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0
 550         },
 551         {
 552                 /*
 553                  * Maxtor Personal Storage 3000XT (Firewire)
 554                  * hangs upon serial number probing.
 555                  */
 556                 {
 557                         T_DIRECT, SIP_MEDIA_FIXED, "Maxtor",
 558                         "1394 storage", "*"
 559                 },
 560                 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0
 561         },
 562         {
 563                 /*
 564                  * Would repond to all LUNs if asked for.
 565                  */
 566                 {
 567                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER",
 568                         "CP150", "*"
 569                 },
 570                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 571         },
 572         {
 573                 /*
 574                  * Would repond to all LUNs if asked for.
 575                  */
 576                 {
 577                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
 578                         "96X2*", "*"
 579                 },
 580                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 581         },
 582         {
 583                 /* Submitted by: Matthew Dodd <winter@jurai.net> */
 584                 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" },
 585                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 586         },
 587         {
 588                 /* Submitted by: Matthew Dodd <winter@jurai.net> */
 589                 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" },
 590                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 591         },
 592         {
 593                 /* TeraSolutions special settings for TRC-22 RAID */
 594                 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" },
 595                   /*quirks*/0, /*mintags*/55, /*maxtags*/255
 596         },
 597         {
 598                 /* Veritas Storage Appliance */
 599                 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" },
 600                   CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024
 601         },
 602         {
 603                 /*
 604                  * Would respond to all LUNs.  Device type and removable
 605                  * flag are jumper-selectable.
 606                  */
 607                 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix",
 608                   "Tahiti 1", "*"
 609                 },
 610                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 611         },
 612         {
 613                 /* EasyRAID E5A aka. areca ARC-6010 */
 614                 { T_DIRECT, SIP_MEDIA_FIXED, "easyRAID", "*", "*" },
 615                   CAM_QUIRK_NOHILUNS, /*mintags*/2, /*maxtags*/255
 616         },
 617         {
 618                 { T_ENCLOSURE, SIP_MEDIA_FIXED, "DP", "BACKPLANE", "*" },
 619                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 620         },
 621         {
 622                 /* Default tagged queuing parameters for all devices */
 623                 {
 624                   T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED,
 625                   /*vendor*/"*", /*product*/"*", /*revision*/"*"
 626                 },
 627                 /*quirks*/0, /*mintags*/2, /*maxtags*/255
 628         },
 629 };
 630
 631 static const int xpt_quirk_table_size =
 632         sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table);
 633
 634 typedef enum {
 635         DM_RET_COPY             = 0x01,
 636         DM_RET_FLAG_MASK        = 0x0f,
 637         DM_RET_NONE             = 0x00,
 638         DM_RET_STOP             = 0x10,
 639         DM_RET_DESCEND          = 0x20,
 640         DM_RET_ERROR            = 0x30,
 641         DM_RET_ACTION_MASK      = 0xf0
 642 } dev_match_ret;
 643
 644 typedef enum {
 645         XPT_DEPTH_BUS,
 646         XPT_DEPTH_TARGET,
 647         XPT_DEPTH_DEVICE,
 648         XPT_DEPTH_PERIPH
 649 } xpt_traverse_depth;
 650
 651 struct xpt_traverse_config {
 652         xpt_traverse_depth      depth;
 653         void                    *tr_func;
 654         void                    *tr_arg;
 655 };
 656
 657 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 658 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 659 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 660 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 661 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 662
 663 /* Transport layer configuration information */
 664 static struct xpt_softc xsoftc;
 665
 666 /* Queues for our software interrupt handler */
 667 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t;
 668 typedef TAILQ_HEAD(cam_simq, cam_sim) cam_simq_t;
 669 static cam_simq_t cam_simq;
 670 static struct mtx cam_simq_lock;
 671
 672 /* Pointers to software interrupt handlers */
 673 static void *cambio_ih;
 674
 675 struct cam_periph *xpt_periph;
 676
 677 static periph_init_t xpt_periph_init;
 678
 679 static periph_init_t probe_periph_init;
 680
 681 static struct periph_driver xpt_driver =
 682 {
 683         xpt_periph_init, "xpt",
 684         TAILQ_HEAD_INITIALIZER(xpt_driver.units)
 685 };
 686
 687 static struct periph_driver probe_driver =
 688 {
 689         probe_periph_init, "probe",
 690         TAILQ_HEAD_INITIALIZER(probe_driver.units)
 691 };
 692
 693 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 694 PERIPHDRIVER_DECLARE(probe, probe_driver);
 695
 696
 697 static d_open_t xptopen;
 698 static d_close_t xptclose;
 699 static d_ioctl_t xptioctl;
 700
 701 static struct cdevsw xpt_cdevsw = {
 702         .d_version =    D_VERSION,
 703         .d_flags =      0,
 704         .d_open =       xptopen,
 705         .d_close =      xptclose,
 706         .d_ioctl =      xptioctl,
 707         .d_name =       "xpt",
 708 };
 709
 710
 711 static void dead_sim_action(struct cam_sim *sim, union ccb *ccb);
 712 static void dead_sim_poll(struct cam_sim *sim);
 713
 714 /* Dummy SIM that is used when the real one has gone. */
 715 static struct cam_sim cam_dead_sim = {
 716         .sim_action =   dead_sim_action,
 717         .sim_poll =     dead_sim_poll,
 718         .sim_name =     "dead_sim",
 719 };
 720
 721 #define SIM_DEAD(sim)   ((sim) == &cam_dead_sim)
 722
 723
 724 /* Storage for debugging datastructures */
 725 #ifdef  CAMDEBUG
 726 struct cam_path *cam_dpath;
 727 u_int32_t cam_dflags;
 728 u_int32_t cam_debug_delay;
 729 #endif
 730
 731 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG)
 732 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS"
 733 #endif
 734
 735 /*
 736  * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG
 737  * enabled.  Also, the user must have either none, or all of CAM_DEBUG_BUS,
 738  * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified.
 739  */
 740 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \
 741     || defined(CAM_DEBUG_LUN)
 742 #ifdef CAMDEBUG
 743 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \
 744     || !defined(CAM_DEBUG_LUN)
 745 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \
 746         and CAM_DEBUG_LUN"
 747 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */
 748 #else /* !CAMDEBUG */
 749 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options"
 750 #endif /* CAMDEBUG */
 751 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */
 752
 753 /* Our boot-time initialization hook */
 754 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 755
 756 static moduledata_t cam_moduledata = {
 757         "cam",
 758         cam_module_event_handler,
 759         NULL
 760 };
 761
 762 static int      xpt_init(void *);
 763
 764 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 765 MODULE_VERSION(cam, 1);
 766
 767
 768 static cam_status       xpt_compile_path(struct cam_path *new_path,
 769                                          struct cam_periph *perph,
 770                                          path_id_t path_id,
 771                                          target_id_t target_id,
 772                                          lun_id_t lun_id);
 773
 774 static void             xpt_release_path(struct cam_path *path);
 775
 776 static void             xpt_async_bcast(struct async_list *async_head,
 777                                         u_int32_t async_code,
 778                                         struct cam_path *path,
 779                                         void *async_arg);
 780 static void             xpt_dev_async(u_int32_t async_code,
 781                                       struct cam_eb *bus,
 782                                       struct cam_et *target,
 783                                       struct cam_ed *device,
 784                                       void *async_arg);
 785 static path_id_t xptnextfreepathid(void);
 786 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 787 static union ccb *xpt_get_ccb(struct cam_ed *device);
 788 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 789                                   u_int32_t new_priority);
 790 static void      xpt_run_dev_allocq(struct cam_eb *bus);
 791 static void      xpt_run_dev_sendq(struct cam_eb *bus);
 792 static timeout_t xpt_release_devq_timeout;
 793 static void      xpt_release_simq_timeout(void *arg) __unused;
 794 static void      xpt_release_bus(struct cam_eb *bus);
 795 static void      xpt_release_devq_device(struct cam_ed *dev, u_int count,
 796                                          int run_queue);
 797 static struct cam_et*
 798                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 799 static void      xpt_release_target(struct cam_eb *bus, struct cam_et *target);
 800 static struct cam_ed*
 801                  xpt_alloc_device(struct cam_eb *bus, struct cam_et *target,
 802                                   lun_id_t lun_id);
 803 static void      xpt_release_device(struct cam_eb *bus, struct cam_et *target,
 804                                     struct cam_ed *device);
 805 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings);
 806 static struct cam_eb*
 807                  xpt_find_bus(path_id_t path_id);
 808 static struct cam_et*
 809                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 810 static struct cam_ed*
 811                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 812 static void      xpt_scan_bus(struct cam_periph *periph, union ccb *ccb);
 813 static void      xpt_scan_lun(struct cam_periph *periph,
 814                               struct cam_path *path, cam_flags flags,
 815                               union ccb *ccb);
 816 static void      xptscandone(struct cam_periph *periph, union ccb *done_ccb);
 817 static xpt_busfunc_t    xptconfigbuscountfunc;
 818 static xpt_busfunc_t    xptconfigfunc;
 819 static void      xpt_config(void *arg);
 820 static xpt_devicefunc_t xptpassannouncefunc;
 821 static void      xpt_finishconfig(struct cam_periph *periph, union ccb *ccb);
 822 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 823 static void      xptpoll(struct cam_sim *sim);
 824 static void      camisr(void *);
 825 static void      camisr_runqueue(void *);
 826 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 827                                     u_int num_patterns, struct cam_eb *bus);
 828 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 829                                        u_int num_patterns,
 830                                        struct cam_ed *device);
 831 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 832                                        u_int num_patterns,
 833                                        struct cam_periph *periph);
 834 static xpt_busfunc_t    xptedtbusfunc;
 835 static xpt_targetfunc_t xptedttargetfunc;
 836 static xpt_devicefunc_t xptedtdevicefunc;
 837 static xpt_periphfunc_t xptedtperiphfunc;
 838 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 839 static xpt_periphfunc_t xptplistperiphfunc;
 840 static int              xptedtmatch(struct ccb_dev_match *cdm);
 841 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 842 static int              xptbustraverse(struct cam_eb *start_bus,
 843                                        xpt_busfunc_t *tr_func, void *arg);
 844 static int              xpttargettraverse(struct cam_eb *bus,
 845                                           struct cam_et *start_target,
 846                                           xpt_targetfunc_t *tr_func, void *arg);
 847 static int              xptdevicetraverse(struct cam_et *target,
 848                                           struct cam_ed *start_device,
 849                                           xpt_devicefunc_t *tr_func, void *arg);
 850 static int              xptperiphtraverse(struct cam_ed *device,
 851                                           struct cam_periph *start_periph,
 852                                           xpt_periphfunc_t *tr_func, void *arg);
 853 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 854                                         xpt_pdrvfunc_t *tr_func, void *arg);
 855 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 856                                             struct cam_periph *start_periph,
 857                                             xpt_periphfunc_t *tr_func,
 858                                             void *arg);
 859 static xpt_busfunc_t    xptdefbusfunc;
 860 static xpt_targetfunc_t xptdeftargetfunc;
 861 static xpt_devicefunc_t xptdefdevicefunc;
 862 static xpt_periphfunc_t xptdefperiphfunc;
 863 static int              xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg);
 864 static int              xpt_for_all_devices(xpt_devicefunc_t *tr_func,
 865                                             void *arg);
 866 static xpt_devicefunc_t xptsetasyncfunc;
 867 static xpt_busfunc_t    xptsetasyncbusfunc;
 868 static cam_status       xptregister(struct cam_periph *periph,
 869                                     void *arg);
 870 static cam_status       proberegister(struct cam_periph *periph,
 871                                       void *arg);
 872 static void      probeschedule(struct cam_periph *probe_periph);
 873 static void      probestart(struct cam_periph *periph, union ccb *start_ccb);
 874 static void      proberequestdefaultnegotiation(struct cam_periph *periph);
 875 static int       proberequestbackoff(struct cam_periph *periph,
 876                                      struct cam_ed *device);
 877 static void      probedone(struct cam_periph *periph, union ccb *done_ccb);
 878 static void      probecleanup(struct cam_periph *periph);
 879 static void      xpt_find_quirk(struct cam_ed *device);
 880 static void      xpt_devise_transport(struct cam_path *path);
 881 static void      xpt_set_transfer_settings(struct ccb_trans_settings *cts,
 882                                            struct cam_ed *device,
 883                                            int async_update);
 884 static void      xpt_toggle_tags(struct cam_path *path);
 885 static void      xpt_start_tags(struct cam_path *path);
 886 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus,
 887                                             struct cam_ed *dev);
 888 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus,
 889                                            struct cam_ed *dev);
 890 static __inline int periph_is_queued(struct cam_periph *periph);
 891 static __inline int device_is_alloc_queued(struct cam_ed *device);
 892 static __inline int device_is_send_queued(struct cam_ed *device);
 893 static __inline int dev_allocq_is_runnable(struct cam_devq *devq);
 894
 895 static __inline int
 896 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev)
 897 {
 898         int retval;
 899
 900         if (dev->ccbq.devq_openings > 0) {
 901                 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) {
 902                         cam_ccbq_resize(&dev->ccbq,
 903                                         dev->ccbq.dev_openings
 904                                         + dev->ccbq.dev_active);
 905                         dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED;
 906                 }
 907                 /*
 908                  * The priority of a device waiting for CCB resources
 909                  * is that of the the highest priority peripheral driver
 910                  * enqueued.
 911                  */
 912                 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue,
 913                                           &dev->alloc_ccb_entry.pinfo,
 914                                           CAMQ_GET_HEAD(&dev->drvq)->priority);
 915         } else {
 916                 retval = 0;
 917         }
 918
 919         return (retval);
 920 }
 921
 922 static __inline int
 923 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev)
 924 {
 925         int     retval;
 926
 927         if (dev->ccbq.dev_openings > 0) {
 928                 /*
 929                  * The priority of a device waiting for controller
 930                  * resources is that of the the highest priority CCB
 931                  * enqueued.
 932                  */
 933                 retval =
 934                     xpt_schedule_dev(&bus->sim->devq->send_queue,
 935                                      &dev->send_ccb_entry.pinfo,
 936                                      CAMQ_GET_HEAD(&dev->ccbq.queue)->priority);
 937         } else {
 938                 retval = 0;
 939         }
 940         return (retval);
 941 }
 942
 943 static __inline int
 944 periph_is_queued(struct cam_periph *periph)
 945 {
 946         return (periph->pinfo.index != CAM_UNQUEUED_INDEX);
 947 }
 948
 949 static __inline int
 950 device_is_alloc_queued(struct cam_ed *device)
 951 {
 952         return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
 953 }
 954
 955 static __inline int
 956 device_is_send_queued(struct cam_ed *device)
 957 {
 958         return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
 959 }
 960
 961 static __inline int
 962 dev_allocq_is_runnable(struct cam_devq *devq)
 963 {
 964         /*
 965          * Have work to do.
 966          * Have space to do more work.
 967          * Allowed to do work.
 968          */
 969         return ((devq->alloc_queue.qfrozen_cnt == 0)
 970              && (devq->alloc_queue.entries > 0)
 971              && (devq->alloc_openings > 0));
 972 }
 973
 974 static void
 975 xpt_periph_init()
 976 {
 977         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 978 }
 979
 980 static void
 981 probe_periph_init()
 982 {
 983 }
 984
 985
 986 static void
 987 xptdone(struct cam_periph *periph, union ccb *done_ccb)
 988 {
 989         /* Caller will release the CCB */
 990         wakeup(&done_ccb->ccb_h.cbfcnp);
 991 }
 992
 993 static int
 994 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 995 {
 996
 997         /*
 998          * Only allow read-write access.
 999          */
1000         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
1001                 return(EPERM);
1002
1003         /*
1004          * We don't allow nonblocking access.
1005          */
1006         if ((flags & O_NONBLOCK) != 0) {
1007                 printf("%s: can't do nonblocking access\n", devtoname(dev));
1008                 return(ENODEV);
1009         }
1010
1011         /* Mark ourselves open */
1012         mtx_lock(&xsoftc.xpt_lock);
1013         xsoftc.flags |= XPT_FLAG_OPEN;
1014         mtx_unlock(&xsoftc.xpt_lock);
1015
1016         return(0);
1017 }
1018
1019 static int
1020 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
1021 {
1022
1023         /* Mark ourselves closed */
1024         mtx_lock(&xsoftc.xpt_lock);
1025         xsoftc.flags &= ~XPT_FLAG_OPEN;
1026         mtx_unlock(&xsoftc.xpt_lock);
1027
1028         return(0);
1029 }
1030
1031 /*
1032  * Don't automatically grab the xpt softc lock here even though this is going
1033  * through the xpt device.  The xpt device is really just a back door for
1034  * accessing other devices and SIMs, so the right thing to do is to grab
1035  * the appropriate SIM lock once the bus/SIM is located.
1036  */
1037 static int
1038 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1039 {
1040         int error;
1041
1042         error = 0;
1043
1044         switch(cmd) {
1045         /*
1046          * For the transport layer CAMIOCOMMAND ioctl, we really only want
1047          * to accept CCB types that don't quite make sense to send through a
1048          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
1049          * in the CAM spec.
1050          */
1051         case CAMIOCOMMAND: {
1052                 union ccb *ccb;
1053                 union ccb *inccb;
1054                 struct cam_eb *bus;
1055
1056                 inccb = (union ccb *)addr;
1057
1058                 bus = xpt_find_bus(inccb->ccb_h.path_id);
1059                 if (bus == NULL) {
1060                         error = EINVAL;
1061                         break;
1062                 }
1063
1064                 switch(inccb->ccb_h.func_code) {
1065                 case XPT_SCAN_BUS:
1066                 case XPT_RESET_BUS:
1067                         if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD)
1068                          || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) {
1069                                 error = EINVAL;
1070                                 break;
1071                         }
1072                         /* FALLTHROUGH */
1073                 case XPT_PATH_INQ:
1074                 case XPT_ENG_INQ:
1075                 case XPT_SCAN_LUN:
1076
1077                         ccb = xpt_alloc_ccb();
1078
1079                         CAM_SIM_LOCK(bus->sim);
1080
1081                         /*
1082                          * Create a path using the bus, target, and lun the
1083                          * user passed in.
1084                          */
1085                         if (xpt_create_path(&ccb->ccb_h.path, xpt_periph,
1086                                             inccb->ccb_h.path_id,
1087                                             inccb->ccb_h.target_id,
1088                                             inccb->ccb_h.target_lun) !=
1089                                             CAM_REQ_CMP){
1090                                 error = EINVAL;
1091                                 CAM_SIM_UNLOCK(bus->sim);
1092                                 xpt_free_ccb(ccb);
1093                                 break;
1094                         }
1095                         /* Ensure all of our fields are correct */
1096                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
1097                                       inccb->ccb_h.pinfo.priority);
1098                         xpt_merge_ccb(ccb, inccb);
1099                         ccb->ccb_h.cbfcnp = xptdone;
1100                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
1101                         bcopy(ccb, inccb, sizeof(union ccb));
1102                         xpt_free_path(ccb->ccb_h.path);
1103                         xpt_free_ccb(ccb);
1104                         CAM_SIM_UNLOCK(bus->sim);
1105                         break;
1106
1107                 case XPT_DEBUG: {
1108                         union ccb ccb;
1109
1110                         /*
1111                          * This is an immediate CCB, so it's okay to
1112                          * allocate it on the stack.
1113                          */
1114
1115                         CAM_SIM_LOCK(bus->sim);
1116
1117                         /*
1118                          * Create a path using the bus, target, and lun the
1119                          * user passed in.
1120                          */
1121                         if (xpt_create_path(&ccb.ccb_h.path, xpt_periph,
1122                                             inccb->ccb_h.path_id,
1123                                             inccb->ccb_h.target_id,
1124                                             inccb->ccb_h.target_lun) !=
1125                                             CAM_REQ_CMP){
1126                                 error = EINVAL;
1127                                 break;
1128                         }
1129                         /* Ensure all of our fields are correct */
1130                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
1131                                       inccb->ccb_h.pinfo.priority);
1132                         xpt_merge_ccb(&ccb, inccb);
1133                         ccb.ccb_h.cbfcnp = xptdone;
1134                         xpt_action(&ccb);
1135                         CAM_SIM_UNLOCK(bus->sim);
1136                         bcopy(&ccb, inccb, sizeof(union ccb));
1137                         xpt_free_path(ccb.ccb_h.path);
1138                         break;
1139
1140                 }
1141                 case XPT_DEV_MATCH: {
1142                         struct cam_periph_map_info mapinfo;
1143                         struct cam_path *old_path;
1144
1145                         /*
1146                          * We can't deal with physical addresses for this
1147                          * type of transaction.
1148                          */
1149                         if (inccb->ccb_h.flags & CAM_DATA_PHYS) {
1150                                 error = EINVAL;
1151                                 break;
1152                         }
1153
1154                         /*
1155                          * Save this in case the caller had it set to
1156                          * something in particular.
1157                          */
1158                         old_path = inccb->ccb_h.path;
1159
1160                         /*
1161                          * We really don't need a path for the matching
1162                          * code.  The path is needed because of the
1163                          * debugging statements in xpt_action().  They
1164                          * assume that the CCB has a valid path.
1165                          */
1166                         inccb->ccb_h.path = xpt_periph->path;
1167
1168                         bzero(&mapinfo, sizeof(mapinfo));
1169
1170                         /*
1171                          * Map the pattern and match buffers into kernel
1172                          * virtual address space.
1173                          */
1174                         error = cam_periph_mapmem(inccb, &mapinfo);
1175
1176                         if (error) {
1177                                 inccb->ccb_h.path = old_path;
1178                                 break;
1179                         }
1180
1181                         /*
1182                          * This is an immediate CCB, we can send it on directly.
1183                          */
1184                         xpt_action(inccb);
1185
1186                         /*
1187                          * Map the buffers back into user space.
1188                          */
1189                         cam_periph_unmapmem(inccb, &mapinfo);
1190
1191                         inccb->ccb_h.path = old_path;
1192
1193                         error = 0;
1194                         break;
1195                 }
1196                 default:
1197                         error = ENOTSUP;
1198                         break;
1199                 }
1200                 xpt_release_bus(bus);
1201                 break;
1202         }
1203         /*
1204          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
1205          * with the periphal driver name and unit name filled in.  The other
1206          * fields don't really matter as input.  The passthrough driver name
1207          * ("pass"), and unit number are passed back in the ccb.  The current
1208          * device generation number, and the index into the device peripheral
1209          * driver list, and the status are also passed back.  Note that
1210          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
1211          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
1212          * (or rather should be) impossible for the device peripheral driver
1213          * list to change since we look at the whole thing in one pass, and
1214          * we do it with lock protection.
1215          *
1216          */
1217         case CAMGETPASSTHRU: {
1218                 union ccb *ccb;
1219                 struct cam_periph *periph;
1220                 struct periph_driver **p_drv;
1221                 char   *name;
1222                 u_int unit;
1223                 u_int cur_generation;
1224                 int base_periph_found;
1225                 int splbreaknum;
1226
1227                 ccb = (union ccb *)addr;
1228                 unit = ccb->cgdl.unit_number;
1229                 name = ccb->cgdl.periph_name;
1230                 /*
1231                  * Every 100 devices, we want to drop our lock protection to
1232                  * give the software interrupt handler a chance to run.
1233                  * Most systems won't run into this check, but this should
1234                  * avoid starvation in the software interrupt handler in
1235                  * large systems.
1236                  */
1237                 splbreaknum = 100;
1238
1239                 ccb = (union ccb *)addr;
1240
1241                 base_periph_found = 0;
1242
1243                 /*
1244                  * Sanity check -- make sure we don't get a null peripheral
1245                  * driver name.
1246                  */
1247                 if (*ccb->cgdl.periph_name == '\0') {
1248                         error = EINVAL;
1249                         break;
1250                 }
1251
1252                 /* Keep the list from changing while we traverse it */
1253                 mtx_lock(&xsoftc.xpt_topo_lock);
1254 ptstartover:
1255                 cur_generation = xsoftc.xpt_generation;
1256
1257                 /* first find our driver in the list of drivers */
1258                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
1259                         if (strcmp((*p_drv)->driver_name, name) == 0)
1260                                 break;
1261
1262                 if (*p_drv == NULL) {
1263                         mtx_unlock(&xsoftc.xpt_topo_lock);
1264                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1265                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1266                         *ccb->cgdl.periph_name = '\0';
1267                         ccb->cgdl.unit_number = 0;
1268                         error = ENOENT;
1269                         break;
1270                 }
1271
1272                 /*
1273                  * Run through every peripheral instance of this driver
1274                  * and check to see whether it matches the unit passed
1275                  * in by the user.  If it does, get out of the loops and
1276                  * find the passthrough driver associated with that
1277                  * peripheral driver.
1278                  */
1279                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
1280                      periph = TAILQ_NEXT(periph, unit_links)) {
1281
1282                         if (periph->unit_number == unit) {
1283                                 break;
1284                         } else if (--splbreaknum == 0) {
1285                                 mtx_unlock(&xsoftc.xpt_topo_lock);
1286                                 mtx_lock(&xsoftc.xpt_topo_lock);
1287                                 splbreaknum = 100;
1288                                 if (cur_generation != xsoftc.xpt_generation)
1289                                        goto ptstartover;
1290                         }
1291                 }
1292                 /*
1293                  * If we found the peripheral driver that the user passed
1294                  * in, go through all of the peripheral drivers for that
1295                  * particular device and look for a passthrough driver.
1296                  */
1297                 if (periph != NULL) {
1298                         struct cam_ed *device;
1299                         int i;
1300
1301                         base_periph_found = 1;
1302                         device = periph->path->device;
1303                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
1304                              periph != NULL;
1305                              periph = SLIST_NEXT(periph, periph_links), i++) {
1306                                 /*
1307                                  * Check to see whether we have a
1308                                  * passthrough device or not.
1309                                  */
1310                                 if (strcmp(periph->periph_name, "pass") == 0) {
1311                                         /*
1312                                          * Fill in the getdevlist fields.
1313                                          */
1314                                         strcpy(ccb->cgdl.periph_name,
1315                                                periph->periph_name);
1316                                         ccb->cgdl.unit_number =
1317                                                 periph->unit_number;
1318                                         if (SLIST_NEXT(periph, periph_links))
1319                                                 ccb->cgdl.status =
1320                                                         CAM_GDEVLIST_MORE_DEVS;
1321                                         else
1322                                                 ccb->cgdl.status =
1323                                                        CAM_GDEVLIST_LAST_DEVICE;
1324                                         ccb->cgdl.generation =
1325                                                 device->generation;
1326                                         ccb->cgdl.index = i;
1327                                         /*
1328                                          * Fill in some CCB header fields
1329                                          * that the user may want.
1330                                          */
1331                                         ccb->ccb_h.path_id =
1332                                                 periph->path->bus->path_id;
1333                                         ccb->ccb_h.target_id =
1334                                                 periph->path->target->target_id;
1335                                         ccb->ccb_h.target_lun =
1336                                                 periph->path->device->lun_id;
1337                                         ccb->ccb_h.status = CAM_REQ_CMP;
1338                                         break;
1339                                 }
1340                         }
1341                 }
1342
1343                 /*
1344                  * If the periph is null here, one of two things has
1345                  * happened.  The first possibility is that we couldn't
1346                  * find the unit number of the particular peripheral driver
1347                  * that the user is asking about.  e.g. the user asks for
1348                  * the passthrough driver for "da11".  We find the list of
1349                  * "da" peripherals all right, but there is no unit 11.
1350                  * The other possibility is that we went through the list
1351                  * of peripheral drivers attached to the device structure,
1352                  * but didn't find one with the name "pass".  Either way,
1353                  * we return ENOENT, since we couldn't find something.
1354                  */
1355                 if (periph == NULL) {
1356                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1357                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1358                         *ccb->cgdl.periph_name = '\0';
1359                         ccb->cgdl.unit_number = 0;
1360                         error = ENOENT;
1361                         /*
1362                          * It is unfortunate that this is even necessary,
1363                          * but there are many, many clueless users out there.
1364                          * If this is true, the user is looking for the
1365                          * passthrough driver, but doesn't have one in his
1366                          * kernel.
1367                          */
1368                         if (base_periph_found == 1) {
1369                                 printf("xptioctl: pass driver is not in the "
1370                                        "kernel\n");
1371                                 printf("xptioctl: put \"device pass0\" in "
1372                                        "your kernel config file\n");
1373                         }
1374                 }
1375                 mtx_unlock(&xsoftc.xpt_topo_lock);
1376                 break;
1377                 }
1378         default:
1379                 error = ENOTTY;
1380                 break;
1381         }
1382
1383         return(error);
1384 }
1385
1386 static int
1387 cam_module_event_handler(module_t mod, int what, void *arg)
1388 {
1389         int error;
1390
1391         switch (what) {
1392         case MOD_LOAD:
1393                 if ((error = xpt_init(NULL)) != 0)
1394                         return (error);
1395                 break;
1396         case MOD_UNLOAD:
1397                 return EBUSY;
1398         default:
1399                 return EOPNOTSUPP;
1400         }
1401
1402         return 0;
1403 }
1404
1405 /* thread to handle bus rescans */
1406 static void
1407 xpt_scanner_thread(void *dummy)
1408 {
1409         cam_isrq_t      queue;
1410         union ccb       *ccb;
1411         struct cam_sim  *sim;
1412
1413         for (;;) {
1414                 /*
1415                  * Wait for a rescan request to come in.  When it does, splice
1416                  * it onto a queue from local storage so that the xpt lock
1417                  * doesn't need to be held while the requests are being
1418                  * processed.
1419                  */
1420                 xpt_lock_buses();
1421                 msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
1422                     "ccb_scanq", 0);
1423                 TAILQ_INIT(&queue);
1424                 TAILQ_CONCAT(&queue, &xsoftc.ccb_scanq, sim_links.tqe);
1425                 xpt_unlock_buses();
1426
1427                 while ((ccb = (union ccb *)TAILQ_FIRST(&queue)) != NULL) {
1428                         TAILQ_REMOVE(&queue, &ccb->ccb_h, sim_links.tqe);
1429
1430                         sim = ccb->ccb_h.path->bus->sim;
1431                         CAM_SIM_LOCK(sim);
1432
1433                         ccb->ccb_h.func_code = XPT_SCAN_BUS;
1434                         ccb->ccb_h.cbfcnp = xptdone;
1435                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 5);
1436                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
1437                         xpt_free_path(ccb->ccb_h.path);
1438                         xpt_free_ccb(ccb);
1439                         CAM_SIM_UNLOCK(sim);
1440                 }
1441         }
1442 }
1443
1444 void
1445 xpt_rescan(union ccb *ccb)
1446 {
1447         struct ccb_hdr *hdr;
1448
1449         /*
1450          * Don't make duplicate entries for the same paths.
1451          */
1452         xpt_lock_buses();
1453         TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
1454                 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
1455                         xpt_unlock_buses();
1456                         xpt_print(ccb->ccb_h.path, "rescan already queued\n");
1457                         xpt_free_path(ccb->ccb_h.path);
1458                         xpt_free_ccb(ccb);
1459                         return;
1460                 }
1461         }
1462         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
1463         wakeup(&xsoftc.ccb_scanq);
1464         xpt_unlock_buses();
1465 }
1466
1467 /* Functions accessed by the peripheral drivers */
1468 static int
1469 xpt_init(void *dummy)
1470 {
1471         struct cam_sim *xpt_sim;
1472         struct cam_path *path;
1473         struct cam_devq *devq;
1474         cam_status status;
1475
1476         TAILQ_INIT(&xsoftc.xpt_busses);
1477         TAILQ_INIT(&cam_simq);
1478         TAILQ_INIT(&xsoftc.ccb_scanq);
1479         STAILQ_INIT(&xsoftc.highpowerq);
1480         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
1481
1482         mtx_init(&cam_simq_lock, "CAM SIMQ lock", NULL, MTX_DEF);
1483         mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
1484         mtx_init(&xsoftc.xpt_topo_lock, "XPT topology lock", NULL, MTX_DEF);
1485
1486         /*
1487          * The xpt layer is, itself, the equivelent of a SIM.
1488          * Allow 16 ccbs in the ccb pool for it.  This should
1489          * give decent parallelism when we probe busses and
1490          * perform other XPT functions.
1491          */
1492         devq = cam_simq_alloc(16);
1493         xpt_sim = cam_sim_alloc(xptaction,
1494                                 xptpoll,
1495                                 "xpt",
1496                                 /*softc*/NULL,
1497                                 /*unit*/0,
1498                                 /*mtx*/&xsoftc.xpt_lock,
1499                                 /*max_dev_transactions*/0,
1500                                 /*max_tagged_dev_transactions*/0,
1501                                 devq);
1502         if (xpt_sim == NULL)
1503                 return (ENOMEM);
1504
1505         xpt_sim->max_ccbs = 16;
1506
1507         mtx_lock(&xsoftc.xpt_lock);
1508         if ((status = xpt_bus_register(xpt_sim, /*bus #*/0)) != CAM_SUCCESS) {
1509                 printf("xpt_init: xpt_bus_register failed with status %#x,"
1510                        " failing attach\n", status);
1511                 return (EINVAL);
1512         }
1513
1514         /*
1515          * Looking at the XPT from the SIM layer, the XPT is
1516          * the equivelent of a peripheral driver.  Allocate
1517          * a peripheral driver entry for us.
1518          */
1519         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
1520                                       CAM_TARGET_WILDCARD,
1521                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
1522                 printf("xpt_init: xpt_create_path failed with status %#x,"
1523                        " failing attach\n", status);
1524                 return (EINVAL);
1525         }
1526
1527         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
1528                          path, NULL, 0, xpt_sim);
1529         xpt_free_path(path);
1530         mtx_unlock(&xsoftc.xpt_lock);
1531
1532         /*
1533          * Register a callback for when interrupts are enabled.
1534          */
1535         xsoftc.xpt_config_hook =
1536             (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
1537                                               M_CAMXPT, M_NOWAIT | M_ZERO);
1538         if (xsoftc.xpt_config_hook == NULL) {
1539                 printf("xpt_init: Cannot malloc config hook "
1540                        "- failing attach\n");
1541                 return (ENOMEM);
1542         }
1543
1544         xsoftc.xpt_config_hook->ich_func = xpt_config;
1545         if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
1546                 free (xsoftc.xpt_config_hook, M_CAMXPT);
1547                 printf("xpt_init: config_intrhook_establish failed "
1548                        "- failing attach\n");
1549         }
1550
1551         /* fire up rescan thread */
1552         if (kthread_create(xpt_scanner_thread, NULL, NULL, 0, 0, "xpt_thrd")) {
1553                 printf("xpt_init: failed to create rescan thread\n");
1554         }
1555         /* Install our software interrupt handlers */
1556         swi_add(NULL, "cambio", camisr, NULL, SWI_CAMBIO, INTR_MPSAFE, &cambio_ih);
1557
1558         return (0);
1559 }
1560
1561 static cam_status
1562 xptregister(struct cam_periph *periph, void *arg)
1563 {
1564         struct cam_sim *xpt_sim;
1565
1566         if (periph == NULL) {
1567                 printf("xptregister: periph was NULL!!\n");
1568                 return(CAM_REQ_CMP_ERR);
1569         }
1570
1571         xpt_sim = (struct cam_sim *)arg;
1572         xpt_sim->softc = periph;
1573         xpt_periph = periph;
1574         periph->softc = NULL;
1575
1576         return(CAM_REQ_CMP);
1577 }
1578
1579 int32_t
1580 xpt_add_periph(struct cam_periph *periph)
1581 {
1582         struct cam_ed *device;
1583         int32_t  status;
1584         struct periph_list *periph_head;
1585
1586         mtx_assert(periph->sim->mtx, MA_OWNED);
1587
1588         device = periph->path->device;
1589
1590         periph_head = &device->periphs;
1591
1592         status = CAM_REQ_CMP;
1593
1594         if (device != NULL) {
1595                 /*
1596                  * Make room for this peripheral
1597                  * so it will fit in the queue
1598                  * when it's scheduled to run
1599                  */
1600                 status = camq_resize(&device->drvq,
1601                                      device->drvq.array_size + 1);
1602
1603                 device->generation++;
1604
1605                 SLIST_INSERT_HEAD(periph_head, periph, periph_links);
1606         }
1607
1608         mtx_lock(&xsoftc.xpt_topo_lock);
1609         xsoftc.xpt_generation++;
1610         mtx_unlock(&xsoftc.xpt_topo_lock);
1611
1612         return (status);
1613 }
1614
1615 void
1616 xpt_remove_periph(struct cam_periph *periph)
1617 {
1618         struct cam_ed *device;
1619
1620         mtx_assert(periph->sim->mtx, MA_OWNED);
1621
1622         device = periph->path->device;
1623
1624         if (device != NULL) {
1625                 struct periph_list *periph_head;
1626
1627                 periph_head = &device->periphs;
1628
1629                 /* Release the slot for this peripheral */
1630                 camq_resize(&device->drvq, device->drvq.array_size - 1);
1631
1632                 device->generation++;
1633
1634                 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links);
1635         }
1636
1637         mtx_lock(&xsoftc.xpt_topo_lock);
1638         xsoftc.xpt_generation++;
1639         mtx_unlock(&xsoftc.xpt_topo_lock);
1640 }
1641
1642
1643 void
1644 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1645 {
1646         struct  ccb_pathinq cpi;
1647         struct  ccb_trans_settings cts;
1648         struct  cam_path *path;
1649         u_int   speed;
1650         u_int   freq;
1651         u_int   mb;
1652
1653         mtx_assert(periph->sim->mtx, MA_OWNED);
1654
1655         path = periph->path;
1656         /*
1657          * To ensure that this is printed in one piece,
1658          * mask out CAM interrupts.
1659          */
1660         printf("%s%d at %s%d bus %d target %d lun %d\n",
1661                periph->periph_name, periph->unit_number,
1662                path->bus->sim->sim_name,
1663                path->bus->sim->unit_number,
1664                path->bus->sim->bus_id,
1665                path->target->target_id,
1666                path->device->lun_id);
1667         printf("%s%d: ", periph->periph_name, periph->unit_number);
1668         scsi_print_inquiry(&path->device->inq_data);
1669         if (bootverbose && path->device->serial_num_len > 0) {
1670                 /* Don't wrap the screen  - print only the first 60 chars */
1671                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1672                        periph->unit_number, path->device->serial_num);
1673         }
1674         xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
1675         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1676         cts.type = CTS_TYPE_CURRENT_SETTINGS;
1677         xpt_action((union ccb*)&cts);
1678         if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
1679                 return;
1680         }
1681
1682         /* Ask the SIM for its base transfer speed */
1683         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1684         cpi.ccb_h.func_code = XPT_PATH_INQ;
1685         xpt_action((union ccb *)&cpi);
1686
1687         speed = cpi.base_transfer_speed;
1688         freq = 0;
1689         if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) {
1690                 struct  ccb_trans_settings_spi *spi;
1691
1692                 spi = &cts.xport_specific.spi;
1693                 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0
1694                   && spi->sync_offset != 0) {
1695                         freq = scsi_calc_syncsrate(spi->sync_period);
1696                         speed = freq;
1697                 }
1698
1699                 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0)
1700                         speed *= (0x01 << spi->bus_width);
1701         }
1702
1703         if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) {
1704                 struct  ccb_trans_settings_fc *fc = &cts.xport_specific.fc;
1705                 if (fc->valid & CTS_FC_VALID_SPEED) {
1706                         speed = fc->bitrate;
1707                 }
1708         }
1709
1710         if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SAS) {
1711                 struct  ccb_trans_settings_sas *sas = &cts.xport_specific.sas;
1712                 if (sas->valid & CTS_SAS_VALID_SPEED) {
1713                         speed = sas->bitrate;
1714                 }
1715         }
1716
1717         mb = speed / 1000;
1718         if (mb > 0)
1719                 printf("%s%d: %d.%03dMB/s transfers",
1720                        periph->periph_name, periph->unit_number,
1721                        mb, speed % 1000);
1722         else
1723                 printf("%s%d: %dKB/s transfers", periph->periph_name,
1724                        periph->unit_number, speed);
1725         /* Report additional information about SPI connections */
1726         if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) {
1727                 struct  ccb_trans_settings_spi *spi;
1728
1729                 spi = &cts.xport_specific.spi;
1730                 if (freq != 0) {
1731                         printf(" (%d.%03dMHz%s, offset %d", freq / 1000,
1732                                freq % 1000,
1733                                (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0
1734                              ? " DT" : "",
1735                                spi->sync_offset);
1736                 }
1737                 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0
1738                  && spi->bus_width > 0) {
1739                         if (freq != 0) {
1740                                 printf(", ");
1741                         } else {
1742                                 printf(" (");
1743                         }
1744                         printf("%dbit)", 8 * (0x01 << spi->bus_width));
1745                 } else if (freq != 0) {
1746                         printf(")");
1747                 }
1748         }
1749         if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) {
1750                 struct  ccb_trans_settings_fc *fc;
1751
1752                 fc = &cts.xport_specific.fc;
1753                 if (fc->valid & CTS_FC_VALID_WWNN)
1754                         printf(" WWNN 0x%llx", (long long) fc->wwnn);
1755                 if (fc->valid & CTS_FC_VALID_WWPN)
1756                         printf(" WWPN 0x%llx", (long long) fc->wwpn);
1757                 if (fc->valid & CTS_FC_VALID_PORT)
1758                         printf(" PortID 0x%x", fc->port);
1759         }
1760
1761         if (path->device->inq_flags & SID_CmdQue
1762          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1763                 printf("\n%s%d: Command Queueing Enabled",
1764                        periph->periph_name, periph->unit_number);
1765         }
1766         printf("\n");
1767
1768         /*
1769          * We only want to print the caller's announce string if they've
1770          * passed one in..
1771          */
1772         if (announce_string != NULL)
1773                 printf("%s%d: %s\n", periph->periph_name,
1774                        periph->unit_number, announce_string);
1775 }
1776
1777 static dev_match_ret
1778 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1779             struct cam_eb *bus)
1780 {
1781         dev_match_ret retval;
1782         int i;
1783
1784         retval = DM_RET_NONE;
1785
1786         /*
1787          * If we aren't given something to match against, that's an error.
1788          */
1789         if (bus == NULL)
1790                 return(DM_RET_ERROR);
1791
1792         /*
1793          * If there are no match entries, then this bus matches no
1794          * matter what.
1795          */
1796         if ((patterns == NULL) || (num_patterns == 0))
1797                 return(DM_RET_DESCEND | DM_RET_COPY);
1798
1799         for (i = 0; i < num_patterns; i++) {
1800                 struct bus_match_pattern *cur_pattern;
1801
1802                 /*
1803                  * If the pattern in question isn't for a bus node, we
1804                  * aren't interested.  However, we do indicate to the
1805                  * calling routine that we should continue descending the
1806                  * tree, since the user wants to match against lower-level
1807                  * EDT elements.
1808                  */
1809                 if (patterns[i].type != DEV_MATCH_BUS) {
1810                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1811                                 retval |= DM_RET_DESCEND;
1812                         continue;
1813                 }
1814
1815                 cur_pattern = &patterns[i].pattern.bus_pattern;
1816
1817                 /*
1818                  * If they want to match any bus node, we give them any
1819                  * device node.
1820                  */
1821                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1822                         /* set the copy flag */
1823                         retval |= DM_RET_COPY;
1824
1825                         /*
1826                          * If we've already decided on an action, go ahead
1827                          * and return.
1828                          */
1829                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1830                                 return(retval);
1831                 }
1832
1833                 /*
1834                  * Not sure why someone would do this...
1835                  */
1836                 if (cur_pattern->flags == BUS_MATCH_NONE)
1837                         continue;
1838
1839                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1840                  && (cur_pattern->path_id != bus->path_id))
1841                         continue;
1842
1843                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1844                  && (cur_pattern->bus_id != bus->sim->bus_id))
1845                         continue;
1846
1847                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1848                  && (cur_pattern->unit_number != bus->sim->unit_number))
1849                         continue;
1850
1851                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1852                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1853                              DEV_IDLEN) != 0))
1854                         continue;
1855
1856                 /*
1857                  * If we get to this point, the user definitely wants
1858                  * information on this bus.  So tell the caller to copy the
1859                  * data out.
1860                  */
1861                 retval |= DM_RET_COPY;
1862
1863                 /*
1864                  * If the return action has been set to descend, then we
1865                  * know that we've already seen a non-bus matching
1866                  * expression, therefore we need to further descend the tree.
1867                  * This won't change by continuing around the loop, so we
1868                  * go ahead and return.  If we haven't seen a non-bus
1869                  * matching expression, we keep going around the loop until
1870                  * we exhaust the matching expressions.  We'll set the stop
1871                  * flag once we fall out of the loop.
1872                  */
1873                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1874                         return(retval);
1875         }
1876
1877         /*
1878          * If the return action hasn't been set to descend yet, that means
1879          * we haven't seen anything other than bus matching patterns.  So
1880          * tell the caller to stop descending the tree -- the user doesn't
1881          * want to match against lower level tree elements.
1882          */
1883         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1884                 retval |= DM_RET_STOP;
1885
1886         return(retval);
1887 }
1888
1889 static dev_match_ret
1890 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1891                struct cam_ed *device)
1892 {
1893         dev_match_ret retval;
1894         int i;
1895
1896         retval = DM_RET_NONE;
1897
1898         /*
1899          * If we aren't given something to match against, that's an error.
1900          */
1901         if (device == NULL)
1902                 return(DM_RET_ERROR);
1903
1904         /*
1905          * If there are no match entries, then this device matches no
1906          * matter what.
1907          */
1908         if ((patterns == NULL) || (num_patterns == 0))
1909                 return(DM_RET_DESCEND | DM_RET_COPY);
1910
1911         for (i = 0; i < num_patterns; i++) {
1912                 struct device_match_pattern *cur_pattern;
1913
1914                 /*
1915                  * If the pattern in question isn't for a device node, we
1916                  * aren't interested.
1917                  */
1918                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1919                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1920                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1921                                 retval |= DM_RET_DESCEND;
1922                         continue;
1923                 }
1924
1925                 cur_pattern = &patterns[i].pattern.device_pattern;
1926
1927                 /*
1928                  * If they want to match any device node, we give them any
1929                  * device node.
1930                  */
1931                 if (cur_pattern->flags == DEV_MATCH_ANY) {
1932                         /* set the copy flag */
1933                         retval |= DM_RET_COPY;
1934
1935
1936                         /*
1937                          * If we've already decided on an action, go ahead
1938                          * and return.
1939                          */
1940                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1941                                 return(retval);
1942                 }
1943
1944                 /*
1945                  * Not sure why someone would do this...
1946                  */
1947                 if (cur_pattern->flags == DEV_MATCH_NONE)
1948                         continue;
1949
1950                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1951                  && (cur_pattern->path_id != device->target->bus->path_id))
1952                         continue;
1953
1954                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1955                  && (cur_pattern->target_id != device->target->target_id))
1956                         continue;
1957
1958                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1959                  && (cur_pattern->target_lun != device->lun_id))
1960                         continue;
1961
1962                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1963                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1964                                     (caddr_t)&cur_pattern->inq_pat,
1965                                     1, sizeof(cur_pattern->inq_pat),
1966                                     scsi_static_inquiry_match) == NULL))
1967                         continue;
1968
1969                 /*
1970                  * If we get to this point, the user definitely wants
1971                  * information on this device.  So tell the caller to copy
1972                  * the data out.
1973                  */
1974                 retval |= DM_RET_COPY;
1975
1976                 /*
1977                  * If the return action has been set to descend, then we
1978                  * know that we've already seen a peripheral matching
1979                  * expression, therefore we need to further descend the tree.
1980                  * This won't change by continuing around the loop, so we
1981                  * go ahead and return.  If we haven't seen a peripheral
1982                  * matching expression, we keep going around the loop until
1983                  * we exhaust the matching expressions.  We'll set the stop
1984                  * flag once we fall out of the loop.
1985                  */
1986                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1987                         return(retval);
1988         }
1989
1990         /*
1991          * If the return action hasn't been set to descend yet, that means
1992          * we haven't seen any peripheral matching patterns.  So tell the
1993          * caller to stop descending the tree -- the user doesn't want to
1994          * match against lower level tree elements.
1995          */
1996         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1997                 retval |= DM_RET_STOP;
1998
1999         return(retval);
2000 }
2001
2002 /*
2003  * Match a single peripheral against any number of match patterns.
2004  */
2005 static dev_match_ret
2006 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
2007                struct cam_periph *periph)
2008 {
2009         dev_match_ret retval;
2010         int i;
2011
2012         /*
2013          * If we aren't given something to match against, that's an error.
2014          */
2015         if (periph == NULL)
2016                 return(DM_RET_ERROR);
2017
2018         /*
2019          * If there are no match entries, then this peripheral matches no
2020          * matter what.
2021          */
2022         if ((patterns == NULL) || (num_patterns == 0))
2023                 return(DM_RET_STOP | DM_RET_COPY);
2024
2025         /*
2026          * There aren't any nodes below a peripheral node, so there's no
2027          * reason to descend the tree any further.
2028          */
2029         retval = DM_RET_STOP;
2030
2031         for (i = 0; i < num_patterns; i++) {
2032                 struct periph_match_pattern *cur_pattern;
2033
2034                 /*
2035                  * If the pattern in question isn't for a peripheral, we
2036                  * aren't interested.
2037                  */
2038                 if (patterns[i].type != DEV_MATCH_PERIPH)
2039                         continue;
2040
2041                 cur_pattern = &patterns[i].pattern.periph_pattern;
2042
2043                 /*
2044                  * If they want to match on anything, then we will do so.
2045                  */
2046                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
2047                         /* set the copy flag */
2048                         retval |= DM_RET_COPY;
2049
2050                         /*
2051                          * We've already set the return action to stop,
2052                          * since there are no nodes below peripherals in
2053                          * the tree.
2054                          */
2055                         return(retval);
2056                 }
2057
2058                 /*
2059                  * Not sure why someone would do this...
2060                  */
2061                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
2062                         continue;
2063
2064                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
2065                  && (cur_pattern->path_id != periph->path->bus->path_id))
2066                         continue;
2067
2068                 /*
2069                  * For the target and lun id's, we have to make sure the
2070                  * target and lun pointers aren't NULL.  The xpt peripheral
2071                  * has a wildcard target and device.
2072                  */
2073                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
2074                  && ((periph->path->target == NULL)
2075                  ||(cur_pattern->target_id != periph->path->target->target_id)))
2076                         continue;
2077
2078                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
2079                  && ((periph->path->device == NULL)
2080                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
2081                         continue;
2082
2083                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
2084                  && (cur_pattern->unit_number != periph->unit_number))
2085                         continue;
2086
2087                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
2088                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
2089                              DEV_IDLEN) != 0))
2090                         continue;
2091
2092                 /*
2093                  * If we get to this point, the user definitely wants
2094                  * information on this peripheral.  So tell the caller to
2095                  * copy the data out.
2096                  */
2097                 retval |= DM_RET_COPY;
2098
2099                 /*
2100                  * The return action has already been set to stop, since
2101                  * peripherals don't have any nodes below them in the EDT.
2102                  */
2103                 return(retval);
2104         }
2105
2106         /*
2107          * If we get to this point, the peripheral that was passed in
2108          * doesn't match any of the patterns.
2109          */
2110         return(retval);
2111 }
2112
2113 static int
2114 xptedtbusfunc(struct cam_eb *bus, void *arg)
2115 {
2116         struct ccb_dev_match *cdm;
2117         dev_match_ret retval;
2118
2119         cdm = (struct ccb_dev_match *)arg;
2120
2121         /*
2122          * If our position is for something deeper in the tree, that means
2123          * that we've already seen this node.  So, we keep going down.
2124          */
2125         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2126          && (cdm->pos.cookie.bus == bus)
2127          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2128          && (cdm->pos.cookie.target != NULL))
2129                 retval = DM_RET_DESCEND;
2130         else
2131                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
2132
2133         /*
2134          * If we got an error, bail out of the search.
2135          */
2136         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2137                 cdm->status = CAM_DEV_MATCH_ERROR;
2138                 return(0);
2139         }
2140
2141         /*
2142          * If the copy flag is set, copy this bus out.
2143          */
2144         if (retval & DM_RET_COPY) {
2145                 int spaceleft, j;
2146
2147                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2148                         sizeof(struct dev_match_result));
2149
2150                 /*
2151                  * If we don't have enough space to put in another
2152                  * match result, save our position and tell the
2153                  * user there are more devices to check.
2154                  */
2155                 if (spaceleft < sizeof(struct dev_match_result)) {
2156                         bzero(&cdm->pos, sizeof(cdm->pos));
2157                         cdm->pos.position_type =
2158                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
2159
2160                         cdm->pos.cookie.bus = bus;
2161                         cdm->pos.generations[CAM_BUS_GENERATION]=
2162                                 xsoftc.bus_generation;
2163                         cdm->status = CAM_DEV_MATCH_MORE;
2164                         return(0);
2165                 }
2166                 j = cdm->num_matches;
2167                 cdm->num_matches++;
2168                 cdm->matches[j].type = DEV_MATCH_BUS;
2169                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
2170                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
2171                 cdm->matches[j].result.bus_result.unit_number =
2172                         bus->sim->unit_number;
2173                 strncpy(cdm->matches[j].result.bus_result.dev_name,
2174                         bus->sim->sim_name, DEV_IDLEN);
2175         }
2176
2177         /*
2178          * If the user is only interested in busses, there's no
2179          * reason to descend to the next level in the tree.
2180          */
2181         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2182                 return(1);
2183
2184         /*
2185          * If there is a target generation recorded, check it to
2186          * make sure the target list hasn't changed.
2187          */
2188         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2189          && (bus == cdm->pos.cookie.bus)
2190          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2191          && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0)
2192          && (cdm->pos.generations[CAM_TARGET_GENERATION] !=
2193              bus->generation)) {
2194                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2195                 return(0);
2196         }
2197
2198         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2199          && (cdm->pos.cookie.bus == bus)
2200          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2201          && (cdm->pos.cookie.target != NULL))
2202                 return(xpttargettraverse(bus,
2203                                         (struct cam_et *)cdm->pos.cookie.target,
2204                                          xptedttargetfunc, arg));
2205         else
2206                 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg));
2207 }
2208
2209 static int
2210 xptedttargetfunc(struct cam_et *target, void *arg)
2211 {
2212         struct ccb_dev_match *cdm;
2213
2214         cdm = (struct ccb_dev_match *)arg;
2215
2216         /*
2217          * If there is a device list generation recorded, check it to
2218          * make sure the device list hasn't changed.
2219          */
2220         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2221          && (cdm->pos.cookie.bus == target->bus)
2222          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2223          && (cdm->pos.cookie.target == target)
2224          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2225          && (cdm->pos.generations[CAM_DEV_GENERATION] != 0)
2226          && (cdm->pos.generations[CAM_DEV_GENERATION] !=
2227              target->generation)) {
2228                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2229                 return(0);
2230         }
2231
2232         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2233          && (cdm->pos.cookie.bus == target->bus)
2234          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2235          && (cdm->pos.cookie.target == target)
2236          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2237          && (cdm->pos.cookie.device != NULL))
2238                 return(xptdevicetraverse(target,
2239                                         (struct cam_ed *)cdm->pos.cookie.device,
2240                                          xptedtdevicefunc, arg));
2241         else
2242                 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg));
2243 }
2244
2245 static int
2246 xptedtdevicefunc(struct cam_ed *device, void *arg)
2247 {
2248
2249         struct ccb_dev_match *cdm;
2250         dev_match_ret retval;
2251
2252         cdm = (struct ccb_dev_match *)arg;
2253
2254         /*
2255          * If our position is for something deeper in the tree, that means
2256          * that we've already seen this node.  So, we keep going down.
2257          */
2258         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2259          && (cdm->pos.cookie.device == device)
2260          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2261          && (cdm->pos.cookie.periph != NULL))
2262                 retval = DM_RET_DESCEND;
2263         else
2264                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
2265                                         device);
2266
2267         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2268                 cdm->status = CAM_DEV_MATCH_ERROR;
2269                 return(0);
2270         }
2271
2272         /*
2273          * If the copy flag is set, copy this device out.
2274          */
2275         if (retval & DM_RET_COPY) {
2276                 int spaceleft, j;
2277
2278                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2279                         sizeof(struct dev_match_result));
2280
2281                 /*
2282                  * If we don't have enough space to put in another
2283                  * match result, save our position and tell the
2284                  * user there are more devices to check.
2285                  */
2286                 if (spaceleft < sizeof(struct dev_match_result)) {
2287                         bzero(&cdm->pos, sizeof(cdm->pos));
2288                         cdm->pos.position_type =
2289                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2290                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
2291
2292                         cdm->pos.cookie.bus = device->target->bus;
2293                         cdm->pos.generations[CAM_BUS_GENERATION]=
2294                                 xsoftc.bus_generation;
2295                         cdm->pos.cookie.target = device->target;
2296                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2297                                 device->target->bus->generation;
2298                         cdm->pos.cookie.device = device;
2299                         cdm->pos.generations[CAM_DEV_GENERATION] =
2300                                 device->target->generation;
2301                         cdm->status = CAM_DEV_MATCH_MORE;
2302                         return(0);
2303                 }
2304                 j = cdm->num_matches;
2305                 cdm->num_matches++;
2306                 cdm->matches[j].type = DEV_MATCH_DEVICE;
2307                 cdm->matches[j].result.device_result.path_id =
2308                         device->target->bus->path_id;
2309                 cdm->matches[j].result.device_result.target_id =
2310                         device->target->target_id;
2311                 cdm->matches[j].result.device_result.target_lun =
2312                         device->lun_id;
2313                 bcopy(&device->inq_data,
2314                       &cdm->matches[j].result.device_result.inq_data,
2315                       sizeof(struct scsi_inquiry_data));
2316
2317                 /* Let the user know whether this device is unconfigured */
2318                 if (device->flags & CAM_DEV_UNCONFIGURED)
2319                         cdm->matches[j].result.device_result.flags =
2320                                 DEV_RESULT_UNCONFIGURED;
2321                 else
2322                         cdm->matches[j].result.device_result.flags =
2323                                 DEV_RESULT_NOFLAG;
2324         }
2325
2326         /*
2327          * If the user isn't interested in peripherals, don't descend
2328          * the tree any further.
2329          */
2330         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2331                 return(1);
2332
2333         /*
2334          * If there is a peripheral list generation recorded, make sure
2335          * it hasn't changed.
2336          */
2337         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2338          && (device->target->bus == cdm->pos.cookie.bus)
2339          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2340          && (device->target == cdm->pos.cookie.target)
2341          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2342          && (device == cdm->pos.cookie.device)
2343          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2344          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2345          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2346              device->generation)){
2347                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2348                 return(0);
2349         }
2350
2351         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2352          && (cdm->pos.cookie.bus == device->target->bus)
2353          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2354          && (cdm->pos.cookie.target == device->target)
2355          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2356          && (cdm->pos.cookie.device == device)
2357          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2358          && (cdm->pos.cookie.periph != NULL))
2359                 return(xptperiphtraverse(device,
2360                                 (struct cam_periph *)cdm->pos.cookie.periph,
2361                                 xptedtperiphfunc, arg));
2362         else
2363                 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg));
2364 }
2365
2366 static int
2367 xptedtperiphfunc(struct cam_periph *periph, void *arg)
2368 {
2369         struct ccb_dev_match *cdm;
2370         dev_match_ret retval;
2371
2372         cdm = (struct ccb_dev_match *)arg;
2373
2374         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2375
2376         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2377                 cdm->status = CAM_DEV_MATCH_ERROR;
2378                 return(0);
2379         }
2380
2381         /*
2382          * If the copy flag is set, copy this peripheral out.
2383          */
2384         if (retval & DM_RET_COPY) {
2385                 int spaceleft, j;
2386
2387                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2388                         sizeof(struct dev_match_result));
2389
2390                 /*
2391                  * If we don't have enough space to put in another
2392                  * match result, save our position and tell the
2393                  * user there are more devices to check.
2394                  */
2395                 if (spaceleft < sizeof(struct dev_match_result)) {
2396                         bzero(&cdm->pos, sizeof(cdm->pos));
2397                         cdm->pos.position_type =
2398                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2399                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
2400                                 CAM_DEV_POS_PERIPH;
2401
2402                         cdm->pos.cookie.bus = periph->path->bus;
2403                         cdm->pos.generations[CAM_BUS_GENERATION]=
2404                                 xsoftc.bus_generation;
2405                         cdm->pos.cookie.target = periph->path->target;
2406                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2407                                 periph->path->bus->generation;
2408                         cdm->pos.cookie.device = periph->path->device;
2409                         cdm->pos.generations[CAM_DEV_GENERATION] =
2410                                 periph->path->target->generation;
2411                         cdm->pos.cookie.periph = periph;
2412                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2413                                 periph->path->device->generation;
2414                         cdm->status = CAM_DEV_MATCH_MORE;
2415                         return(0);
2416                 }
2417
2418                 j = cdm->num_matches;
2419                 cdm->num_matches++;
2420                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2421                 cdm->matches[j].result.periph_result.path_id =
2422                         periph->path->bus->path_id;
2423                 cdm->matches[j].result.periph_result.target_id =
2424                         periph->path->target->target_id;
2425                 cdm->matches[j].result.periph_result.target_lun =
2426                         periph->path->device->lun_id;
2427                 cdm->matches[j].result.periph_result.unit_number =
2428                         periph->unit_number;
2429                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2430                         periph->periph_name, DEV_IDLEN);
2431         }
2432
2433         return(1);
2434 }
2435
2436 static int
2437 xptedtmatch(struct ccb_dev_match *cdm)
2438 {
2439         int ret;
2440
2441         cdm->num_matches = 0;
2442
2443         /*
2444          * Check the bus list generation.  If it has changed, the user
2445          * needs to reset everything and start over.
2446          */
2447         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2448          && (cdm->pos.generations[CAM_BUS_GENERATION] != 0)
2449          && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) {
2450                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2451                 return(0);
2452         }
2453
2454         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2455          && (cdm->pos.cookie.bus != NULL))
2456                 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus,
2457                                      xptedtbusfunc, cdm);
2458         else
2459                 ret = xptbustraverse(NULL, xptedtbusfunc, cdm);
2460
2461         /*
2462          * If we get back 0, that means that we had to stop before fully
2463          * traversing the EDT.  It also means that one of the subroutines
2464          * has set the status field to the proper value.  If we get back 1,
2465          * we've fully traversed the EDT and copied out any matching entries.
2466          */
2467         if (ret == 1)
2468                 cdm->status = CAM_DEV_MATCH_LAST;
2469
2470         return(ret);
2471 }
2472
2473 static int
2474 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2475 {
2476         struct ccb_dev_match *cdm;
2477
2478         cdm = (struct ccb_dev_match *)arg;
2479
2480         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2481          && (cdm->pos.cookie.pdrv == pdrv)
2482          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2483          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2484          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2485              (*pdrv)->generation)) {
2486                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2487                 return(0);
2488         }
2489
2490         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2491          && (cdm->pos.cookie.pdrv == pdrv)
2492          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2493          && (cdm->pos.cookie.periph != NULL))
2494                 return(xptpdperiphtraverse(pdrv,
2495                                 (struct cam_periph *)cdm->pos.cookie.periph,
2496                                 xptplistperiphfunc, arg));
2497         else
2498                 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg));
2499 }
2500
2501 static int
2502 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2503 {
2504         struct ccb_dev_match *cdm;
2505         dev_match_ret retval;
2506
2507         cdm = (struct ccb_dev_match *)arg;
2508
2509         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2510
2511         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2512                 cdm->status = CAM_DEV_MATCH_ERROR;
2513                 return(0);
2514         }
2515
2516         /*
2517          * If the copy flag is set, copy this peripheral out.
2518          */
2519         if (retval & DM_RET_COPY) {
2520                 int spaceleft, j;
2521
2522                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2523                         sizeof(struct dev_match_result));
2524
2525                 /*
2526                  * If we don't have enough space to put in another
2527                  * match result, save our position and tell the
2528                  * user there are more devices to check.
2529                  */
2530                 if (spaceleft < sizeof(struct dev_match_result)) {
2531                         struct periph_driver **pdrv;
2532
2533                         pdrv = NULL;
2534                         bzero(&cdm->pos, sizeof(cdm->pos));
2535                         cdm->pos.position_type =
2536                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2537                                 CAM_DEV_POS_PERIPH;
2538
2539                         /*
2540                          * This may look a bit non-sensical, but it is
2541                          * actually quite logical.  There are very few
2542                          * peripheral drivers, and bloating every peripheral
2543                          * structure with a pointer back to its parent
2544                          * peripheral driver linker set entry would cost
2545                          * more in the long run than doing this quick lookup.
2546                          */
2547                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2548                                 if (strcmp((*pdrv)->driver_name,
2549                                     periph->periph_name) == 0)
2550                                         break;
2551                         }
2552
2553                         if (*pdrv == NULL) {
2554                                 cdm->status = CAM_DEV_MATCH_ERROR;
2555                                 return(0);
2556                         }
2557
2558                         cdm->pos.cookie.pdrv = pdrv;
2559                         /*
2560                          * The periph generation slot does double duty, as
2561                          * does the periph pointer slot.  They are used for
2562                          * both edt and pdrv lookups and positioning.
2563                          */
2564                         cdm->pos.cookie.periph = periph;
2565                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2566                                 (*pdrv)->generation;
2567                         cdm->status = CAM_DEV_MATCH_MORE;
2568                         return(0);
2569                 }
2570
2571                 j = cdm->num_matches;
2572                 cdm->num_matches++;
2573                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2574                 cdm->matches[j].result.periph_result.path_id =
2575                         periph->path->bus->path_id;
2576
2577                 /*
2578                  * The transport layer peripheral doesn't have a target or
2579                  * lun.
2580                  */
2581                 if (periph->path->target)
2582                         cdm->matches[j].result.periph_result.target_id =
2583                                 periph->path->target->target_id;
2584                 else
2585                         cdm->matches[j].result.periph_result.target_id = -1;
2586
2587                 if (periph->path->device)
2588                         cdm->matches[j].result.periph_result.target_lun =
2589                                 periph->path->device->lun_id;
2590                 else
2591                         cdm->matches[j].result.periph_result.target_lun = -1;
2592
2593                 cdm->matches[j].result.periph_result.unit_number =
2594                         periph->unit_number;
2595                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2596                         periph->periph_name, DEV_IDLEN);
2597         }
2598
2599         return(1);
2600 }
2601
2602 static int
2603 xptperiphlistmatch(struct ccb_dev_match *cdm)
2604 {
2605         int ret;
2606
2607         cdm->num_matches = 0;
2608
2609         /*
2610          * At this point in the edt traversal function, we check the bus
2611          * list generation to make sure that no busses have been added or
2612          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2613          * For the peripheral driver list traversal function, however, we
2614          * don't have to worry about new peripheral driver types coming or
2615          * going; they're in a linker set, and therefore can't change
2616          * without a recompile.
2617          */
2618
2619         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2620          && (cdm->pos.cookie.pdrv != NULL))
2621                 ret = xptpdrvtraverse(
2622                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2623                                 xptplistpdrvfunc, cdm);
2624         else
2625                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2626
2627         /*
2628          * If we get back 0, that means that we had to stop before fully
2629          * traversing the peripheral driver tree.  It also means that one of
2630          * the subroutines has set the status field to the proper value.  If
2631          * we get back 1, we've fully traversed the EDT and copied out any
2632          * matching entries.
2633          */
2634         if (ret == 1)
2635                 cdm->status = CAM_DEV_MATCH_LAST;
2636
2637         return(ret);
2638 }
2639
2640 static int
2641 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2642 {
2643         struct cam_eb *bus, *next_bus;
2644         int retval;
2645
2646         retval = 1;
2647
2648         mtx_lock(&xsoftc.xpt_topo_lock);
2649         for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses));
2650              bus != NULL;
2651              bus = next_bus) {
2652                 next_bus = TAILQ_NEXT(bus, links);
2653
2654                 mtx_unlock(&xsoftc.xpt_topo_lock);
2655                 CAM_SIM_LOCK(bus->sim);
2656                 retval = tr_func(bus, arg);
2657                 CAM_SIM_UNLOCK(bus->sim);
2658                 if (retval == 0)
2659                         return(retval);
2660                 mtx_lock(&xsoftc.xpt_topo_lock);
2661         }
2662         mtx_unlock(&xsoftc.xpt_topo_lock);
2663
2664         return(retval);
2665 }
2666
2667 static int
2668 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2669                   xpt_targetfunc_t *tr_func, void *arg)
2670 {
2671         struct cam_et *target, *next_target;
2672         int retval;
2673
2674         retval = 1;
2675         for (target = (start_target ? start_target :
2676                        TAILQ_FIRST(&bus->et_entries));
2677              target != NULL; target = next_target) {
2678
2679                 next_target = TAILQ_NEXT(target, links);
2680
2681                 retval = tr_func(target, arg);
2682
2683                 if (retval == 0)
2684                         return(retval);
2685         }
2686
2687         return(retval);
2688 }
2689
2690 static int
2691 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2692                   xpt_devicefunc_t *tr_func, void *arg)
2693 {
2694         struct cam_ed *device, *next_device;
2695         int retval;
2696
2697         retval = 1;
2698         for (device = (start_device ? start_device :
2699                        TAILQ_FIRST(&target->ed_entries));
2700              device != NULL;
2701              device = next_device) {
2702
2703                 next_device = TAILQ_NEXT(device, links);
2704
2705                 retval = tr_func(device, arg);
2706
2707                 if (retval == 0)
2708                         return(retval);
2709         }
2710
2711         return(retval);
2712 }
2713
2714 static int
2715 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2716                   xpt_periphfunc_t *tr_func, void *arg)
2717 {
2718         struct cam_periph *periph, *next_periph;
2719         int retval;
2720
2721         retval = 1;
2722
2723         for (periph = (start_periph ? start_periph :
2724                        SLIST_FIRST(&device->periphs));
2725              periph != NULL;
2726              periph = next_periph) {
2727
2728                 next_periph = SLIST_NEXT(periph, periph_links);
2729
2730                 retval = tr_func(periph, arg);
2731                 if (retval == 0)
2732                         return(retval);
2733         }
2734
2735         return(retval);
2736 }
2737
2738 static int
2739 xptpdrvtraverse(struct periph_driver **start_pdrv,
2740                 xpt_pdrvfunc_t *tr_func, void *arg)
2741 {
2742         struct periph_driver **pdrv;
2743         int retval;
2744
2745         retval = 1;
2746
2747         /*
2748          * We don't traverse the peripheral driver list like we do the
2749          * other lists, because it is a linker set, and therefore cannot be
2750          * changed during runtime.  If the peripheral driver list is ever
2751          * re-done to be something other than a linker set (i.e. it can
2752          * change while the system is running), the list traversal should
2753          * be modified to work like the other traversal functions.
2754          */
2755         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2756              *pdrv != NULL; pdrv++) {
2757                 retval = tr_func(pdrv, arg);
2758
2759                 if (retval == 0)
2760                         return(retval);
2761         }
2762
2763         return(retval);
2764 }
2765
2766 static int
2767 xptpdperiphtraverse(struct periph_driver **pdrv,
2768                     struct cam_periph *start_periph,
2769                     xpt_periphfunc_t *tr_func, void *arg)
2770 {
2771         struct cam_periph *periph, *next_periph;
2772         int retval;
2773
2774         retval = 1;
2775
2776         for (periph = (start_periph ? start_periph :
2777              TAILQ_FIRST(&(*pdrv)->units)); periph != NULL;
2778              periph = next_periph) {
2779
2780                 next_periph = TAILQ_NEXT(periph, unit_links);
2781
2782                 retval = tr_func(periph, arg);
2783                 if (retval == 0)
2784                         return(retval);
2785         }
2786         return(retval);
2787 }
2788
2789 static int
2790 xptdefbusfunc(struct cam_eb *bus, void *arg)
2791 {
2792         struct xpt_traverse_config *tr_config;
2793
2794         tr_config = (struct xpt_traverse_config *)arg;
2795
2796         if (tr_config->depth == XPT_DEPTH_BUS) {
2797                 xpt_busfunc_t *tr_func;
2798
2799                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2800
2801                 return(tr_func(bus, tr_config->tr_arg));
2802         } else
2803                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2804 }
2805
2806 static int
2807 xptdeftargetfunc(struct cam_et *target, void *arg)
2808 {
2809         struct xpt_traverse_config *tr_config;
2810
2811         tr_config = (struct xpt_traverse_config *)arg;
2812
2813         if (tr_config->depth == XPT_DEPTH_TARGET) {
2814                 xpt_targetfunc_t *tr_func;
2815
2816                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2817
2818                 return(tr_func(target, tr_config->tr_arg));
2819         } else
2820                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2821 }
2822
2823 static int
2824 xptdefdevicefunc(struct cam_ed *device, void *arg)
2825 {
2826         struct xpt_traverse_config *tr_config;
2827
2828         tr_config = (struct xpt_traverse_config *)arg;
2829
2830         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2831                 xpt_devicefunc_t *tr_func;
2832
2833                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2834
2835                 return(tr_func(device, tr_config->tr_arg));
2836         } else
2837                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2838 }
2839
2840 static int
2841 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2842 {
2843         struct xpt_traverse_config *tr_config;
2844         xpt_periphfunc_t *tr_func;
2845
2846         tr_config = (struct xpt_traverse_config *)arg;
2847
2848         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2849
2850         /*
2851          * Unlike the other default functions, we don't check for depth
2852          * here.  The peripheral driver level is the last level in the EDT,
2853          * so if we're here, we should execute the function in question.
2854          */
2855         return(tr_func(periph, tr_config->tr_arg));
2856 }
2857
2858 /*
2859  * Execute the given function for every bus in the EDT.
2860  */
2861 static int
2862 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2863 {
2864         struct xpt_traverse_config tr_config;
2865
2866         tr_config.depth = XPT_DEPTH_BUS;
2867         tr_config.tr_func = tr_func;
2868         tr_config.tr_arg = arg;
2869
2870         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2871 }
2872
2873 /*
2874  * Execute the given function for every device in the EDT.
2875  */
2876 static int
2877 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2878 {
2879         struct xpt_traverse_config tr_config;
2880
2881         tr_config.depth = XPT_DEPTH_DEVICE;
2882         tr_config.tr_func = tr_func;
2883         tr_config.tr_arg = arg;
2884
2885         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2886 }
2887
2888 static int
2889 xptsetasyncfunc(struct cam_ed *device, void *arg)
2890 {
2891         struct cam_path path;
2892         struct ccb_getdev cgd;
2893         struct async_node *cur_entry;
2894
2895         cur_entry = (struct async_node *)arg;
2896
2897         /*
2898          * Don't report unconfigured devices (Wildcard devs,
2899          * devices only for target mode, device instances
2900          * that have been invalidated but are waiting for
2901          * their last reference count to be released).
2902          */
2903         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2904                 return (1);
2905
2906         xpt_compile_path(&path,
2907                          NULL,
2908                          device->target->bus->path_id,
2909                          device->target->target_id,
2910                          device->lun_id);
2911         xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1);
2912         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2913         xpt_action((union ccb *)&cgd);
2914         cur_entry->callback(cur_entry->callback_arg,
2915                             AC_FOUND_DEVICE,
2916                             &path, &cgd);
2917         xpt_release_path(&path);
2918
2919         return(1);
2920 }
2921
2922 static int
2923 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2924 {
2925         struct cam_path path;
2926         struct ccb_pathinq cpi;
2927         struct async_node *cur_entry;
2928
2929         cur_entry = (struct async_node *)arg;
2930
2931         xpt_compile_path(&path, /*periph*/NULL,
2932                          bus->sim->path_id,
2933                          CAM_TARGET_WILDCARD,
2934                          CAM_LUN_WILDCARD);
2935         xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
2936         cpi.ccb_h.func_code = XPT_PATH_INQ;
2937         xpt_action((union ccb *)&cpi);
2938         cur_entry->callback(cur_entry->callback_arg,
2939                             AC_PATH_REGISTERED,
2940                             &path, &cpi);
2941         xpt_release_path(&path);
2942
2943         return(1);
2944 }
2945
2946 static void
2947 xpt_action_sasync_cb(void *context, int pending)
2948 {
2949         struct async_node *cur_entry;
2950         struct xpt_task *task;
2951         uint32_t added;
2952
2953         task = (struct xpt_task *)context;
2954         cur_entry = (struct async_node *)task->data1;
2955         added = task->data2;
2956
2957         if ((added & AC_FOUND_DEVICE) != 0) {
2958                 /*
2959                  * Get this peripheral up to date with all
2960                  * the currently existing devices.
2961                  */
2962                 xpt_for_all_devices(xptsetasyncfunc, cur_entry);
2963         }
2964         if ((added & AC_PATH_REGISTERED) != 0) {
2965                 /*
2966                  * Get this peripheral up to date with all
2967                  * the currently existing busses.
2968                  */
2969                 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry);
2970                 }
2971
2972         free(task, M_CAMXPT);
2973 }
2974
2975 void
2976 xpt_action(union ccb *start_ccb)
2977 {
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         switch (start_ccb->ccb_h.func_code) {
2984         case XPT_SCSI_IO:
2985         {
2986                 struct cam_ed *device;
2987 #ifdef CAMDEBUG
2988                 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
2989                 struct cam_path *path;
2990
2991                 path = start_ccb->ccb_h.path;
2992 #endif
2993
2994                 /*
2995                  * For the sake of compatibility with SCSI-1
2996                  * devices that may not understand the identify
2997                  * message, we include lun information in the
2998                  * second byte of all commands.  SCSI-1 specifies
2999                  * that luns are a 3 bit value and reserves only 3
3000                  * bits for lun information in the CDB.  Later
3001                  * revisions of the SCSI spec allow for more than 8
3002                  * luns, but have deprecated lun information in the
3003                  * CDB.  So, if the lun won't fit, we must omit.
3004                  *
3005                  * Also be aware that during initial probing for devices,
3006                  * the inquiry information is unknown but initialized to 0.
3007                  * This means that this code will be exercised while probing
3008                  * devices with an ANSI revision greater than 2.
3009                  */
3010                 device = start_ccb->ccb_h.path->device;
3011                 if (device->protocol_version <= SCSI_REV_2
3012                  && start_ccb->ccb_h.target_lun < 8
3013                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
3014
3015                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
3016                             start_ccb->ccb_h.target_lun << 5;
3017                 }
3018                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
3019                 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n",
3020                           scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0],
3021                                        &path->device->inq_data),
3022                           scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes,
3023                                           cdb_str, sizeof(cdb_str))));
3024         }
3025         /* FALLTHROUGH */
3026         case XPT_TARGET_IO:
3027         case XPT_CONT_TARGET_IO:
3028                 start_ccb->csio.sense_resid = 0;
3029                 start_ccb->csio.resid = 0;
3030                 /* FALLTHROUGH */
3031         case XPT_RESET_DEV:
3032         case XPT_ENG_EXEC:
3033         {
3034                 struct cam_path *path;
3035                 struct cam_sim *sim;
3036                 int runq;
3037
3038                 path = start_ccb->ccb_h.path;
3039
3040                 sim = path->bus->sim;
3041                 if (SIM_DEAD(sim)) {
3042                         /* The SIM has gone; just execute the CCB directly. */
3043                         cam_ccbq_send_ccb(&path->device->ccbq, start_ccb);
3044                         (*(sim->sim_action))(sim, start_ccb);
3045                         break;
3046                 }
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                 if (runq != 0)
3054                         xpt_run_dev_sendq(path->bus);
3055                 break;
3056         }
3057         case XPT_SET_TRAN_SETTINGS:
3058         {
3059                 xpt_set_transfer_settings(&start_ccb->cts,
3060                                           start_ccb->ccb_h.path->device,
3061                                           /*async_update*/FALSE);
3062                 break;
3063         }
3064         case XPT_CALC_GEOMETRY:
3065         {
3066                 struct cam_sim *sim;
3067
3068                 /* Filter out garbage */
3069                 if (start_ccb->ccg.block_size == 0
3070                  || start_ccb->ccg.volume_size == 0) {
3071                         start_ccb->ccg.cylinders = 0;
3072                         start_ccb->ccg.heads = 0;
3073                         start_ccb->ccg.secs_per_track = 0;
3074                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3075                         break;
3076                 }
3077 #ifdef PC98
3078                 /*
3079                  * In a PC-98 system, geometry translation depens on
3080                  * the "real" device geometry obtained from mode page 4.
3081                  * SCSI geometry translation is performed in the
3082                  * initialization routine of the SCSI BIOS and the result
3083                  * stored in host memory.  If the translation is available
3084                  * in host memory, use it.  If not, rely on the default
3085                  * translation the device driver performs.
3086                  */
3087                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
3088                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3089                         break;
3090                 }
3091 #endif
3092                 sim = start_ccb->ccb_h.path->bus->sim;
3093                 (*(sim->sim_action))(sim, start_ccb);
3094                 break;
3095         }
3096         case XPT_ABORT:
3097         {
3098                 union ccb* abort_ccb;
3099
3100                 abort_ccb = start_ccb->cab.abort_ccb;
3101                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
3102
3103                         if (abort_ccb->ccb_h.pinfo.index >= 0) {
3104                                 struct cam_ccbq *ccbq;
3105
3106                                 ccbq = &abort_ccb->ccb_h.path->device->ccbq;
3107                                 cam_ccbq_remove_ccb(ccbq, abort_ccb);
3108                                 abort_ccb->ccb_h.status =
3109                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
3110                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
3111                                 xpt_done(abort_ccb);
3112                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3113                                 break;
3114                         }
3115                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
3116                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
3117                                 /*
3118                                  * We've caught this ccb en route to
3119                                  * the SIM.  Flag it for abort and the
3120                                  * SIM will do so just before starting
3121                                  * real work on the CCB.
3122                                  */
3123                                 abort_ccb->ccb_h.status =
3124                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
3125                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
3126                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3127                                 break;
3128                         }
3129                 }
3130                 if (XPT_FC_IS_QUEUED(abort_ccb)
3131                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
3132                         /*
3133                          * It's already completed but waiting
3134                          * for our SWI to get to it.
3135                          */
3136                         start_ccb->ccb_h.status = CAM_UA_ABORT;
3137                         break;
3138                 }
3139                 /*
3140                  * If we weren't able to take care of the abort request
3141                  * in the XPT, pass the request down to the SIM for processing.
3142                  */
3143         }
3144         /* FALLTHROUGH */
3145         case XPT_ACCEPT_TARGET_IO:
3146         case XPT_EN_LUN:
3147         case XPT_IMMED_NOTIFY:
3148         case XPT_NOTIFY_ACK:
3149         case XPT_GET_TRAN_SETTINGS:
3150         case XPT_RESET_BUS:
3151         {
3152                 struct cam_sim *sim;
3153
3154                 sim = start_ccb->ccb_h.path->bus->sim;
3155                 (*(sim->sim_action))(sim, start_ccb);
3156                 break;
3157         }
3158         case XPT_PATH_INQ:
3159         {
3160                 struct cam_sim *sim;
3161
3162                 sim = start_ccb->ccb_h.path->bus->sim;
3163                 (*(sim->sim_action))(sim, start_ccb);
3164                 break;
3165         }
3166         case XPT_PATH_STATS:
3167                 start_ccb->cpis.last_reset =
3168                         start_ccb->ccb_h.path->bus->last_reset;
3169                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3170                 break;
3171         case XPT_GDEV_TYPE:
3172         {
3173                 struct cam_ed *dev;
3174
3175                 dev = start_ccb->ccb_h.path->device;
3176                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
3177                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
3178                 } else {
3179                         struct ccb_getdev *cgd;
3180                         struct cam_eb *bus;
3181                         struct cam_et *tar;
3182
3183                         cgd = &start_ccb->cgd;
3184                         bus = cgd->ccb_h.path->bus;
3185                         tar = cgd->ccb_h.path->target;
3186                         cgd->inq_data = dev->inq_data;
3187                         cgd->ccb_h.status = CAM_REQ_CMP;
3188                         cgd->serial_num_len = dev->serial_num_len;
3189                         if ((dev->serial_num_len > 0)
3190                          && (dev->serial_num != NULL))
3191                                 bcopy(dev->serial_num, cgd->serial_num,
3192                                       dev->serial_num_len);
3193                 }
3194                 break;
3195         }
3196         case XPT_GDEV_STATS:
3197         {
3198                 struct cam_ed *dev;
3199
3200                 dev = start_ccb->ccb_h.path->device;
3201                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
3202                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
3203                 } else {
3204                         struct ccb_getdevstats *cgds;
3205                         struct cam_eb *bus;
3206                         struct cam_et *tar;
3207
3208                         cgds = &start_ccb->cgds;
3209                         bus = cgds->ccb_h.path->bus;
3210                         tar = cgds->ccb_h.path->target;
3211                         cgds->dev_openings = dev->ccbq.dev_openings;
3212                         cgds->dev_active = dev->ccbq.dev_active;
3213                         cgds->devq_openings = dev->ccbq.devq_openings;
3214                         cgds->devq_queued = dev->ccbq.queue.entries;
3215                         cgds->held = dev->ccbq.held;
3216                         cgds->last_reset = tar->last_reset;
3217                         cgds->maxtags = dev->quirk->maxtags;
3218                         cgds->mintags = dev->quirk->mintags;
3219                         if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
3220                                 cgds->last_reset = bus->last_reset;
3221                         cgds->ccb_h.status = CAM_REQ_CMP;
3222                 }
3223                 break;
3224         }
3225         case XPT_GDEVLIST:
3226         {
3227                 struct cam_periph       *nperiph;
3228                 struct periph_list      *periph_head;
3229                 struct ccb_getdevlist   *cgdl;
3230                 u_int                   i;
3231                 struct cam_ed           *device;
3232                 int                     found;
3233
3234
3235                 found = 0;
3236
3237                 /*
3238                  * Don't want anyone mucking with our data.
3239                  */
3240                 device = start_ccb->ccb_h.path->device;
3241                 periph_head = &device->periphs;
3242                 cgdl = &start_ccb->cgdl;
3243
3244                 /*
3245                  * Check and see if the list has changed since the user
3246                  * last requested a list member.  If so, tell them that the
3247                  * list has changed, and therefore they need to start over
3248                  * from the beginning.
3249                  */
3250                 if ((cgdl->index != 0) &&
3251                     (cgdl->generation != device->generation)) {
3252                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
3253                         break;
3254                 }
3255
3256                 /*
3257                  * Traverse the list of peripherals and attempt to find
3258                  * the requested peripheral.
3259                  */
3260                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
3261                      (nperiph != NULL) && (i <= cgdl->index);
3262                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
3263                         if (i == cgdl->index) {
3264                                 strncpy(cgdl->periph_name,
3265                                         nperiph->periph_name,
3266                                         DEV_IDLEN);
3267                                 cgdl->unit_number = nperiph->unit_number;
3268                                 found = 1;
3269                         }
3270                 }
3271                 if (found == 0) {
3272                         cgdl->status = CAM_GDEVLIST_ERROR;
3273                         break;
3274                 }
3275
3276                 if (nperiph == NULL)
3277                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
3278                 else
3279                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
3280
3281                 cgdl->index++;
3282                 cgdl->generation = device->generation;
3283
3284                 cgdl->ccb_h.status = CAM_REQ_CMP;
3285                 break;
3286         }
3287         case XPT_DEV_MATCH:
3288         {
3289                 dev_pos_type position_type;
3290                 struct ccb_dev_match *cdm;
3291
3292                 cdm = &start_ccb->cdm;
3293
3294                 /*
3295                  * There are two ways of getting at information in the EDT.
3296                  * The first way is via the primary EDT tree.  It starts
3297                  * with a list of busses, then a list of targets on a bus,
3298                  * then devices/luns on a target, and then peripherals on a
3299                  * device/lun.  The "other" way is by the peripheral driver
3300                  * lists.  The peripheral driver lists are organized by
3301                  * peripheral driver.  (obviously)  So it makes sense to
3302                  * use the peripheral driver list if the user is looking
3303                  * for something like "da1", or all "da" devices.  If the
3304                  * user is looking for something on a particular bus/target
3305                  * or lun, it's generally better to go through the EDT tree.
3306                  */
3307
3308                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
3309                         position_type = cdm->pos.position_type;
3310                 else {
3311                         u_int i;
3312
3313                         position_type = CAM_DEV_POS_NONE;
3314
3315                         for (i = 0; i < cdm->num_patterns; i++) {
3316                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
3317                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
3318                                         position_type = CAM_DEV_POS_EDT;
3319                                         break;
3320                                 }
3321                         }
3322
3323                         if (cdm->num_patterns == 0)
3324                                 position_type = CAM_DEV_POS_EDT;
3325                         else if (position_type == CAM_DEV_POS_NONE)
3326                                 position_type = CAM_DEV_POS_PDRV;
3327                 }
3328
3329                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
3330                 case CAM_DEV_POS_EDT:
3331                         xptedtmatch(cdm);
3332                         break;
3333                 case CAM_DEV_POS_PDRV:
3334                         xptperiphlistmatch(cdm);
3335                         break;
3336                 default:
3337                         cdm->status = CAM_DEV_MATCH_ERROR;
3338                         break;
3339                 }
3340
3341                 if (cdm->status == CAM_DEV_MATCH_ERROR)
3342                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
3343                 else
3344                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3345
3346                 break;
3347         }
3348         case XPT_SASYNC_CB:
3349         {
3350                 struct ccb_setasync *csa;
3351                 struct async_node *cur_entry;
3352                 struct async_list *async_head;
3353                 u_int32_t added;
3354
3355                 csa = &start_ccb->csa;
3356                 added = csa->event_enable;
3357                 async_head = &csa->ccb_h.path->device->asyncs;
3358
3359                 /*
3360                  * If there is already an entry for us, simply
3361                  * update it.
3362                  */
3363                 cur_entry = SLIST_FIRST(async_head);
3364                 while (cur_entry != NULL) {
3365                         if ((cur_entry->callback_arg == csa->callback_arg)
3366                          && (cur_entry->callback == csa->callback))
3367                                 break;
3368                         cur_entry = SLIST_NEXT(cur_entry, links);
3369                 }
3370
3371                 if (cur_entry != NULL) {
3372                         /*
3373                          * If the request has no flags set,
3374                          * remove the entry.
3375                          */
3376                         added &= ~cur_entry->event_enable;
3377                         if (csa->event_enable == 0) {
3378                                 SLIST_REMOVE(async_head, cur_entry,
3379                                              async_node, links);
3380                                 csa->ccb_h.path->device->refcount--;
3381                                 free(cur_entry, M_CAMXPT);
3382                         } else {
3383                                 cur_entry->event_enable = csa->event_enable;
3384                         }
3385                 } else {
3386                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3387                                            M_NOWAIT);
3388                         if (cur_entry == NULL) {
3389                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3390                                 break;
3391                         }
3392                         cur_entry->event_enable = csa->event_enable;
3393                         cur_entry->callback_arg = csa->callback_arg;
3394                         cur_entry->callback = csa->callback;
3395                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3396                         csa->ccb_h.path->device->refcount++;
3397                 }
3398
3399                 /*
3400                  * Need to decouple this operation via a taqskqueue so that
3401                  * the locking doesn't become a mess.
3402                  */
3403                 if ((added & (AC_FOUND_DEVICE | AC_PATH_REGISTERED)) != 0) {
3404                         struct xpt_task *task;
3405
3406                         task = malloc(sizeof(struct xpt_task), M_CAMXPT,
3407                                       M_NOWAIT);
3408                         if (task == NULL) {
3409                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3410                                 break;
3411                         }
3412
3413                         TASK_INIT(&task->task, 0, xpt_action_sasync_cb, task);
3414                         task->data1 = cur_entry;
3415                         task->data2 = added;
3416                         taskqueue_enqueue(taskqueue_thread, &task->task);
3417                 }
3418
3419                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3420                 break;
3421         }
3422         case XPT_REL_SIMQ:
3423         {
3424                 struct ccb_relsim *crs;
3425                 struct cam_ed *dev;
3426
3427                 crs = &start_ccb->crs;
3428                 dev = crs->ccb_h.path->device;
3429                 if (dev == NULL) {
3430
3431                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3432                         break;
3433                 }
3434
3435                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3436
3437                         if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) {
3438                                 /* Don't ever go below one opening */
3439                                 if (crs->openings > 0) {
3440                                         xpt_dev_ccbq_resize(crs->ccb_h.path,
3441                                                             crs->openings);
3442
3443                                         if (bootverbose) {
3444                                                 xpt_print(crs->ccb_h.path,
3445                                                     "tagged openings now %d\n",
3446                                                     crs->openings);
3447                                         }
3448                                 }
3449                         }
3450                 }
3451
3452                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3453
3454                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3455
3456                                 /*
3457                                  * Just extend the old timeout and decrement
3458                                  * the freeze count so that a single timeout
3459                                  * is sufficient for releasing the queue.
3460                                  */
3461                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3462                                 callout_stop(&dev->callout);
3463                         } else {
3464
3465                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3466                         }
3467
3468                         callout_reset(&dev->callout,
3469                             (crs->release_timeout * hz) / 1000,
3470                             xpt_release_devq_timeout, dev);
3471
3472                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3473
3474                 }
3475
3476                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3477
3478                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3479                                 /*
3480                                  * Decrement the freeze count so that a single
3481                                  * completion is still sufficient to unfreeze
3482                                  * the queue.
3483                                  */
3484                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3485                         } else {
3486
3487                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3488                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3489                         }
3490                 }
3491
3492                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3493
3494                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3495                          || (dev->ccbq.dev_active == 0)) {
3496
3497                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3498                         } else {
3499
3500                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3501                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3502                         }
3503                 }
3504
3505                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) {
3506
3507                         xpt_release_devq(crs->ccb_h.path, /*count*/1,
3508                                          /*run_queue*/TRUE);
3509                 }
3510                 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt;
3511                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3512                 break;
3513         }
3514         case XPT_SCAN_BUS:
3515                 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb);
3516                 break;
3517         case XPT_SCAN_LUN:
3518                 xpt_scan_lun(start_ccb->ccb_h.path->periph,
3519                              start_ccb->ccb_h.path, start_ccb->crcn.flags,
3520                              start_ccb);
3521                 break;
3522         case XPT_DEBUG: {
3523 #ifdef CAMDEBUG
3524 #ifdef CAM_DEBUG_DELAY
3525                 cam_debug_delay = CAM_DEBUG_DELAY;
3526 #endif
3527                 cam_dflags = start_ccb->cdbg.flags;
3528                 if (cam_dpath != NULL) {
3529                         xpt_free_path(cam_dpath);
3530                         cam_dpath = NULL;
3531                 }
3532
3533                 if (cam_dflags != CAM_DEBUG_NONE) {
3534                         if (xpt_create_path(&cam_dpath, xpt_periph,
3535                                             start_ccb->ccb_h.path_id,
3536                                             start_ccb->ccb_h.target_id,
3537                                             start_ccb->ccb_h.target_lun) !=
3538                                             CAM_REQ_CMP) {
3539                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3540                                 cam_dflags = CAM_DEBUG_NONE;
3541                         } else {
3542                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3543                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3544                                     cam_dflags);
3545                         }
3546                 } else {
3547                         cam_dpath = NULL;
3548                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3549                 }
3550 #else /* !CAMDEBUG */
3551                 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3552 #endif /* CAMDEBUG */
3553                 break;
3554         }
3555         case XPT_NOOP:
3556                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3557                         xpt_freeze_devq(start_ccb->ccb_h.path, 1);
3558                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3559                 break;
3560         default:
3561         case XPT_SDEV_TYPE:
3562         case XPT_TERM_IO:
3563         case XPT_ENG_INQ:
3564                 /* XXX Implement */
3565                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3566                 break;
3567         }
3568 }
3569
3570 void
3571 xpt_polled_action(union ccb *start_ccb)
3572 {
3573         u_int32_t timeout;
3574         struct    cam_sim *sim;
3575         struct    cam_devq *devq;
3576         struct    cam_ed *dev;
3577
3578
3579         timeout = start_ccb->ccb_h.timeout;
3580         sim = start_ccb->ccb_h.path->bus->sim;
3581         devq = sim->devq;
3582         dev = start_ccb->ccb_h.path->device;
3583
3584         mtx_assert(sim->mtx, MA_OWNED);
3585
3586         /*
3587          * Steal an opening so that no other queued requests
3588          * can get it before us while we simulate interrupts.
3589          */
3590         dev->ccbq.devq_openings--;
3591         dev->ccbq.dev_openings--;
3592
3593         while(((devq != NULL && devq->send_openings <= 0) ||
3594            dev->ccbq.dev_openings < 0) && (--timeout > 0)) {
3595                 DELAY(1000);
3596                 (*(sim->sim_poll))(sim);
3597                 camisr_runqueue(&sim->sim_doneq);
3598         }
3599
3600         dev->ccbq.devq_openings++;
3601         dev->ccbq.dev_openings++;
3602
3603         if (timeout != 0) {
3604                 xpt_action(start_ccb);
3605                 while(--timeout > 0) {
3606                         (*(sim->sim_poll))(sim);
3607                         camisr_runqueue(&sim->sim_doneq);
3608                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3609                             != CAM_REQ_INPROG)
3610                                 break;
3611                         DELAY(1000);
3612                 }
3613                 if (timeout == 0) {
3614                         /*
3615                          * XXX Is it worth adding a sim_timeout entry
3616                          * point so we can attempt recovery?  If
3617                          * this is only used for dumps, I don't think
3618                          * it is.
3619                          */
3620                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3621                 }
3622         } else {
3623                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3624         }
3625 }
3626
3627 /*
3628  * Schedule a peripheral driver to receive a ccb when it's
3629  * target device has space for more transactions.
3630  */
3631 void
3632 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority)
3633 {
3634         struct cam_ed *device;
3635         union ccb *work_ccb;
3636         int runq;
3637
3638         mtx_assert(perph->sim->mtx, MA_OWNED);
3639
3640         CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3641         device = perph->path->device;
3642         if (periph_is_queued(perph)) {
3643                 /* Simply reorder based on new priority */
3644                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3645                           ("   change priority to %d\n", new_priority));
3646                 if (new_priority < perph->pinfo.priority) {
3647                         camq_change_priority(&device->drvq,
3648                                              perph->pinfo.index,
3649                                              new_priority);
3650                 }
3651                 runq = 0;
3652         } else if (SIM_DEAD(perph->path->bus->sim)) {
3653                 /* The SIM is gone so just call periph_start directly. */
3654                 work_ccb = xpt_get_ccb(perph->path->device);
3655                 if (work_ccb == NULL)
3656                         return; /* XXX */
3657                 xpt_setup_ccb(&work_ccb->ccb_h, perph->path, new_priority);
3658                 perph->pinfo.priority = new_priority;
3659                 perph->periph_start(perph, work_ccb);
3660                 return;
3661         } else {
3662                 /* New entry on the queue */
3663                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3664                           ("   added periph to queue\n"));
3665                 perph->pinfo.priority = new_priority;
3666                 perph->pinfo.generation = ++device->drvq.generation;
3667                 camq_insert(&device->drvq, &perph->pinfo);
3668                 runq = xpt_schedule_dev_allocq(perph->path->bus, device);
3669         }
3670         if (runq != 0) {
3671                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3672                           ("   calling xpt_run_devq\n"));
3673                 xpt_run_dev_allocq(perph->path->bus);
3674         }
3675 }
3676
3677
3678 /*
3679  * Schedule a device to run on a given queue.
3680  * If the device was inserted as a new entry on the queue,
3681  * return 1 meaning the device queue should be run. If we
3682  * were already queued, implying someone else has already
3683  * started the queue, return 0 so the caller doesn't attempt
3684  * to run the queue.
3685  */
3686 static int
3687 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3688                  u_int32_t new_priority)
3689 {
3690         int retval;
3691         u_int32_t old_priority;
3692
3693         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3694
3695         old_priority = pinfo->priority;
3696
3697         /*
3698          * Are we already queued?
3699          */
3700         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3701                 /* Simply reorder based on new priority */
3702                 if (new_priority < old_priority) {
3703                         camq_change_priority(queue, pinfo->index,
3704                                              new_priority);
3705                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3706                                         ("changed priority to %d\n",
3707                                          new_priority));
3708                 }
3709                 retval = 0;
3710         } else {
3711                 /* New entry on the queue */
3712                 if (new_priority < old_priority)
3713                         pinfo->priority = new_priority;
3714
3715                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3716                                 ("Inserting onto queue\n"));
3717                 pinfo->generation = ++queue->generation;
3718                 camq_insert(queue, pinfo);
3719                 retval = 1;
3720         }
3721         return (retval);
3722 }
3723
3724 static void
3725 xpt_run_dev_allocq(struct cam_eb *bus)
3726 {
3727         struct  cam_devq *devq;
3728
3729         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n"));
3730         devq = bus->sim->devq;
3731
3732         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3733                         ("   qfrozen_cnt == 0x%x, entries == %d, "
3734                          "openings == %d, active == %d\n",
3735                          devq->alloc_queue.qfrozen_cnt,
3736                          devq->alloc_queue.entries,
3737                          devq->alloc_openings,
3738                          devq->alloc_active));
3739
3740         devq->alloc_queue.qfrozen_cnt++;
3741         while ((devq->alloc_queue.entries > 0)
3742             && (devq->alloc_openings > 0)
3743             && (devq->alloc_queue.qfrozen_cnt <= 1)) {
3744                 struct  cam_ed_qinfo *qinfo;
3745                 struct  cam_ed *device;
3746                 union   ccb *work_ccb;
3747                 struct  cam_periph *drv;
3748                 struct  camq *drvq;
3749
3750                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
3751                                                            CAMQ_HEAD);
3752                 device = qinfo->device;
3753
3754                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3755                                 ("running device %p\n", device));
3756
3757                 drvq = &device->drvq;
3758
3759 #ifdef CAMDEBUG
3760                 if (drvq->entries <= 0) {
3761                         panic("xpt_run_dev_allocq: "
3762                               "Device on queue without any work to do");
3763                 }
3764 #endif
3765                 if ((work_ccb = xpt_get_ccb(device)) != NULL) {
3766                         devq->alloc_openings--;
3767                         devq->alloc_active++;
3768                         drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD);
3769                         xpt_setup_ccb(&work_ccb->ccb_h, drv->path,
3770                                       drv->pinfo.priority);
3771                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3772                                         ("calling periph start\n"));
3773                         drv->periph_start(drv, work_ccb);
3774                 } else {
3775                         /*
3776                          * Malloc failure in alloc_ccb
3777                          */
3778                         /*
3779                          * XXX add us to a list to be run from free_ccb
3780                          * if we don't have any ccbs active on this
3781                          * device queue otherwise we may never get run
3782                          * again.
3783                          */
3784                         break;
3785                 }
3786
3787                 if (drvq->entries > 0) {
3788                         /* We have more work.  Attempt to reschedule */
3789                         xpt_schedule_dev_allocq(bus, device);
3790                 }
3791         }
3792         devq->alloc_queue.qfrozen_cnt--;
3793 }
3794
3795 static void
3796 xpt_run_dev_sendq(struct cam_eb *bus)
3797 {
3798         struct  cam_devq *devq;
3799
3800         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n"));
3801
3802         devq = bus->sim->devq;
3803
3804         devq->send_queue.qfrozen_cnt++;
3805         while ((devq->send_queue.entries > 0)
3806             && (devq->send_openings > 0)) {
3807                 struct  cam_ed_qinfo *qinfo;
3808                 struct  cam_ed *device;
3809                 union ccb *work_ccb;
3810                 struct  cam_sim *sim;
3811
3812                 if (devq->send_queue.qfrozen_cnt > 1) {
3813                         break;
3814                 }
3815
3816                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
3817                                                            CAMQ_HEAD);
3818                 device = qinfo->device;
3819
3820                 /*
3821                  * If the device has been "frozen", don't attempt
3822                  * to run it.
3823                  */
3824                 if (device->qfrozen_cnt > 0) {
3825                         continue;
3826                 }
3827
3828                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3829                                 ("running device %p\n", device));
3830
3831                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3832                 if (work_ccb == NULL) {
3833                         printf("device on run queue with no ccbs???\n");
3834                         continue;
3835                 }
3836
3837                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3838
3839                         mtx_lock(&xsoftc.xpt_lock);
3840                         if (xsoftc.num_highpower <= 0) {
3841                                 /*
3842                                  * We got a high power command, but we
3843                                  * don't have any available slots.  Freeze
3844                                  * the device queue until we have a slot
3845                                  * available.
3846                                  */
3847                                 device->qfrozen_cnt++;
3848                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq,
3849                                                    &work_ccb->ccb_h,
3850                                                    xpt_links.stqe);
3851
3852                                 continue;
3853                         } else {
3854                                 /*
3855                                  * Consume a high power slot while
3856                                  * this ccb runs.
3857                                  */
3858                                 xsoftc.num_highpower--;
3859                         }
3860                         mtx_unlock(&xsoftc.xpt_lock);
3861                 }
3862                 devq->active_dev = device;
3863                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3864
3865                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3866
3867                 devq->send_openings--;
3868                 devq->send_active++;
3869
3870                 if (device->ccbq.queue.entries > 0)
3871                         xpt_schedule_dev_sendq(bus, device);
3872
3873                 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){
3874                         /*
3875                          * The client wants to freeze the queue
3876                          * after this CCB is sent.
3877                          */
3878                         device->qfrozen_cnt++;
3879                 }
3880
3881                 /* In Target mode, the peripheral driver knows best... */
3882                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3883                         if ((device->inq_flags & SID_CmdQue) != 0
3884                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3885                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3886                         else
3887                                 /*
3888                                  * Clear this in case of a retried CCB that
3889                                  * failed due to a rejected tag.
3890                                  */
3891                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3892                 }
3893
3894                 /*
3895                  * Device queues can be shared among multiple sim instances
3896                  * that reside on different busses.  Use the SIM in the queue
3897                  * CCB's path, rather than the one in the bus that was passed
3898                  * into this function.
3899                  */
3900                 sim = work_ccb->ccb_h.path->bus->sim;
3901                 (*(sim->sim_action))(sim, work_ccb);
3902
3903                 devq->active_dev = NULL;
3904         }
3905         devq->send_queue.qfrozen_cnt--;
3906 }
3907
3908 /*
3909  * This function merges stuff from the slave ccb into the master ccb, while
3910  * keeping important fields in the master ccb constant.
3911  */
3912 void
3913 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3914 {
3915
3916         /*
3917          * Pull fields that are valid for peripheral drivers to set
3918          * into the master CCB along with the CCB "payload".
3919          */
3920         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3921         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3922         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3923         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3924         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3925               sizeof(union ccb) - sizeof(struct ccb_hdr));
3926 }
3927
3928 void
3929 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3930 {
3931
3932         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3933         ccb_h->pinfo.priority = priority;
3934         ccb_h->path = path;
3935         ccb_h->path_id = path->bus->path_id;
3936         if (path->target)
3937                 ccb_h->target_id = path->target->target_id;
3938         else
3939                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3940         if (path->device) {
3941                 ccb_h->target_lun = path->device->lun_id;
3942                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3943         } else {
3944                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3945         }
3946         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3947         ccb_h->flags = 0;
3948 }
3949
3950 /* Path manipulation functions */
3951 cam_status
3952 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3953                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3954 {
3955         struct     cam_path *path;
3956         cam_status status;
3957
3958         path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_NOWAIT);
3959
3960         if (path == NULL) {
3961                 status = CAM_RESRC_UNAVAIL;
3962                 return(status);
3963         }
3964         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3965         if (status != CAM_REQ_CMP) {
3966                 free(path, M_CAMXPT);
3967                 path = NULL;
3968         }
3969         *new_path_ptr = path;
3970         return (status);
3971 }
3972
3973 cam_status
3974 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3975                          struct cam_periph *periph, path_id_t path_id,
3976                          target_id_t target_id, lun_id_t lun_id)
3977 {
3978         struct     cam_path *path;
3979         struct     cam_eb *bus = NULL;
3980         cam_status status;
3981         int        need_unlock = 0;
3982
3983         path = (struct cam_path *)malloc(sizeof(*path), M_CAMXPT, M_WAITOK);
3984
3985         if (path_id != CAM_BUS_WILDCARD) {
3986                 bus = xpt_find_bus(path_id);
3987                 if (bus != NULL) {
3988                         need_unlock = 1;
3989                         CAM_SIM_LOCK(bus->sim);
3990                 }
3991         }
3992         status = xpt_compile_path(path, periph, path_id, target_id, lun_id);
3993         if (need_unlock)
3994                 CAM_SIM_UNLOCK(bus->sim);
3995         if (status != CAM_REQ_CMP) {
3996                 free(path, M_CAMXPT);
3997                 path = NULL;
3998         }
3999         *new_path_ptr = path;
4000         return (status);
4001 }
4002
4003 static cam_status
4004 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
4005                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
4006 {
4007         struct       cam_eb *bus;
4008         struct       cam_et *target;
4009         struct       cam_ed *device;
4010         cam_status   status;
4011
4012         status = CAM_REQ_CMP;   /* Completed without error */
4013         target = NULL;          /* Wildcarded */
4014         device = NULL;          /* Wildcarded */
4015
4016         /*
4017          * We will potentially modify the EDT, so block interrupts
4018          * that may attempt to create cam paths.
4019          */
4020         bus = xpt_find_bus(path_id);
4021         if (bus == NULL) {
4022                 status = CAM_PATH_INVALID;
4023         } else {
4024                 target = xpt_find_target(bus, target_id);
4025                 if (target == NULL) {
4026                         /* Create one */
4027                         struct cam_et *new_target;
4028
4029                         new_target = xpt_alloc_target(bus, target_id);
4030                         if (new_target == NULL) {
4031                                 status = CAM_RESRC_UNAVAIL;
4032                         } else {
4033                                 target = new_target;
4034                         }
4035                 }
4036                 if (target != NULL) {
4037                         device = xpt_find_device(target, lun_id);
4038                         if (device == NULL) {
4039                                 /* Create one */
4040                                 struct cam_ed *new_device;
4041
4042                                 new_device = xpt_alloc_device(bus,
4043                                                               target,
4044                                                               lun_id);
4045                                 if (new_device == NULL) {
4046                                         status = CAM_RESRC_UNAVAIL;
4047                                 } else {
4048                                         device = new_device;
4049                                 }
4050                         }
4051                 }
4052         }
4053
4054         /*
4055          * Only touch the user's data if we are successful.
4056          */
4057         if (status == CAM_REQ_CMP) {
4058                 new_path->periph = perph;
4059                 new_path->bus = bus;
4060                 new_path->target = target;
4061                 new_path->device = device;
4062                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
4063         } else {
4064                 if (device != NULL)
4065                         xpt_release_device(bus, target, device);
4066                 if (target != NULL)
4067                         xpt_release_target(bus, target);
4068                 if (bus != NULL)
4069                         xpt_release_bus(bus);
4070         }
4071         return (status);
4072 }
4073
4074 static void
4075 xpt_release_path(struct cam_path *path)
4076 {
4077         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
4078         if (path->device != NULL) {
4079                 xpt_release_device(path->bus, path->target, path->device);
4080                 path->device = NULL;
4081         }
4082         if (path->target != NULL) {
4083                 xpt_release_target(path->bus, path->target);
4084                 path->target = NULL;
4085         }
4086         if (path->bus != NULL) {
4087                 xpt_release_bus(path->bus);
4088                 path->bus = NULL;
4089         }
4090 }
4091
4092 void
4093 xpt_free_path(struct cam_path *path)
4094 {
4095
4096         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
4097         xpt_release_path(path);
4098         free(path, M_CAMXPT);
4099 }
4100
4101
4102 /*
4103  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
4104  * in path1, 2 for match with wildcards in path2.
4105  */
4106 int
4107 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
4108 {
4109         int retval = 0;
4110
4111         if (path1->bus != path2->bus) {
4112                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
4113                         retval = 1;
4114                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
4115                         retval = 2;
4116                 else
4117                         return (-1);
4118         }
4119         if (path1->target != path2->target) {
4120                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
4121                         if (retval == 0)
4122                                 retval = 1;
4123                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
4124                         retval = 2;
4125                 else
4126                         return (-1);
4127         }
4128         if (path1->device != path2->device) {
4129                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
4130                         if (retval == 0)
4131                                 retval = 1;
4132                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
4133                         retval = 2;
4134                 else
4135                         return (-1);
4136         }
4137         return (retval);
4138 }
4139
4140 void
4141 xpt_print_path(struct cam_path *path)
4142 {
4143
4144         if (path == NULL)
4145                 printf("(nopath): ");
4146         else {
4147                 if (path->periph != NULL)
4148                         printf("(%s%d:", path->periph->periph_name,
4149                                path->periph->unit_number);
4150                 else
4151                         printf("(noperiph:");
4152
4153                 if (path->bus != NULL)
4154                         printf("%s%d:%d:", path->bus->sim->sim_name,
4155                                path->bus->sim->unit_number,
4156                                path->bus->sim->bus_id);
4157                 else
4158                         printf("nobus:");
4159
4160                 if (path->target != NULL)
4161                         printf("%d:", path->target->target_id);
4162                 else
4163                         printf("X:");
4164
4165                 if (path->device != NULL)
4166                         printf("%d): ", path->device->lun_id);
4167                 else
4168                         printf("X): ");
4169         }
4170 }
4171
4172 void
4173 xpt_print(struct cam_path *path, const char *fmt, ...)
4174 {
4175         va_list ap;
4176         xpt_print_path(path);
4177         va_start(ap, fmt);
4178         vprintf(fmt, ap);
4179         va_end(ap);
4180 }
4181
4182 int
4183 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
4184 {
4185         struct sbuf sb;
4186
4187         mtx_assert(path->bus->sim->mtx, MA_OWNED);
4188
4189         sbuf_new(&sb, str, str_len, 0);
4190
4191         if (path == NULL)
4192                 sbuf_printf(&sb, "(nopath): ");
4193         else {
4194                 if (path->periph != NULL)
4195                         sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
4196                                     path->periph->unit_number);
4197                 else
4198                         sbuf_printf(&sb, "(noperiph:");
4199
4200                 if (path->bus != NULL)
4201                         sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
4202                                     path->bus->sim->unit_number,
4203                                     path->bus->sim->bus_id);
4204                 else
4205                         sbuf_printf(&sb, "nobus:");
4206
4207                 if (path->target != NULL)
4208                         sbuf_printf(&sb, "%d:", path->target->target_id);
4209                 else
4210                         sbuf_printf(&sb, "X:");
4211
4212                 if (path->device != NULL)
4213                         sbuf_printf(&sb, "%d): ", path->device->lun_id);
4214                 else
4215                         sbuf_printf(&sb, "X): ");
4216         }
4217         sbuf_finish(&sb);
4218
4219         return(sbuf_len(&sb));
4220 }
4221
4222 path_id_t
4223 xpt_path_path_id(struct cam_path *path)
4224 {
4225         mtx_assert(path->bus->sim->mtx, MA_OWNED);
4226
4227         return(path->bus->path_id);
4228 }
4229
4230 target_id_t
4231 xpt_path_target_id(struct cam_path *path)
4232 {
4233         mtx_assert(path->bus->sim->mtx, MA_OWNED);
4234
4235         if (path->target != NULL)
4236                 return (path->target->target_id);
4237         else
4238                 return (CAM_TARGET_WILDCARD);
4239 }
4240
4241 lun_id_t
4242 xpt_path_lun_id(struct cam_path *path)
4243 {
4244         mtx_assert(path->bus->sim->mtx, MA_OWNED);
4245
4246         if (path->device != NULL)
4247                 return (path->device->lun_id);
4248         else
4249                 return (CAM_LUN_WILDCARD);
4250 }
4251
4252 struct cam_sim *
4253 xpt_path_sim(struct cam_path *path)
4254 {
4255
4256         return (path->bus->sim);
4257 }
4258
4259 struct cam_periph*
4260 xpt_path_periph(struct cam_path *path)
4261 {
4262         mtx_assert(path->bus->sim->mtx, MA_OWNED);
4263
4264         return (path->periph);
4265 }
4266
4267 /*
4268  * Release a CAM control block for the caller.  Remit the cost of the structure
4269  * to the device referenced by the path.  If the this device had no 'credits'
4270  * and peripheral drivers have registered async callbacks for this notification
4271  * call them now.
4272  */
4273 void
4274 xpt_release_ccb(union ccb *free_ccb)
4275 {
4276         struct   cam_path *path;
4277         struct   cam_ed *device;
4278         struct   cam_eb *bus;
4279         struct   cam_sim *sim;
4280
4281         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
4282         path = free_ccb->ccb_h.path;
4283         device = path->device;
4284         bus = path->bus;
4285         sim = bus->sim;
4286
4287         mtx_assert(sim->mtx, MA_OWNED);
4288
4289         cam_ccbq_release_opening(&device->ccbq);
4290         if (sim->ccb_count > sim->max_ccbs) {
4291                 xpt_free_ccb(free_ccb);
4292                 sim->ccb_count--;
4293         } else {
4294                 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h,
4295                     xpt_links.sle);
4296         }
4297         if (sim->devq == NULL) {
4298                 return;
4299         }
4300         sim->devq->alloc_openings++;
4301         sim->devq->alloc_active--;
4302         /* XXX Turn this into an inline function - xpt_run_device?? */
4303         if ((device_is_alloc_queued(device) == 0)
4304          && (device->drvq.entries > 0)) {
4305                 xpt_schedule_dev_allocq(bus, device);
4306         }
4307         if (dev_allocq_is_runnable(sim->devq))
4308                 xpt_run_dev_allocq(bus);
4309 }
4310
4311 /* Functions accessed by SIM drivers */
4312
4313 /*
4314  * A sim structure, listing the SIM entry points and instance
4315  * identification info is passed to xpt_bus_register to hook the SIM
4316  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
4317  * for this new bus and places it in the array of busses and assigns
4318  * it a path_id.  The path_id may be influenced by "hard wiring"
4319  * information specified by the user.  Once interrupt services are
4320  * availible, the bus will be probed.
4321  */
4322 int32_t
4323 xpt_bus_register(struct cam_sim *sim, u_int32_t bus)
4324 {
4325         struct cam_eb *new_bus;
4326         struct cam_eb *old_bus;
4327         struct ccb_pathinq cpi;
4328
4329         mtx_assert(sim->mtx, MA_OWNED);
4330
4331         sim->bus_id = bus;
4332         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4333                                           M_CAMXPT, M_NOWAIT);
4334         if (new_bus == NULL) {
4335                 /* Couldn't satisfy request */
4336                 return (CAM_RESRC_UNAVAIL);
4337         }
4338
4339         if (strcmp(sim->sim_name, "xpt") != 0) {
4340
4341                 sim->path_id =
4342                     xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4343         }
4344
4345         TAILQ_INIT(&new_bus->et_entries);
4346         new_bus->path_id = sim->path_id;
4347         new_bus->sim = sim;
4348         timevalclear(&new_bus->last_reset);
4349         new_bus->flags = 0;
4350         new_bus->refcount = 1;  /* Held until a bus_deregister event */
4351         new_bus->generation = 0;
4352         mtx_lock(&xsoftc.xpt_topo_lock);
4353         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4354         while (old_bus != NULL
4355             && old_bus->path_id < new_bus->path_id)
4356                 old_bus = TAILQ_NEXT(old_bus, links);
4357         if (old_bus != NULL)
4358                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4359         else
4360                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
4361         xsoftc.bus_generation++;
4362         mtx_unlock(&xsoftc.xpt_topo_lock);
4363
4364         /* Notify interested parties */
4365         if (sim->path_id != CAM_XPT_PATH_ID) {
4366                 struct cam_path path;
4367
4368                 xpt_compile_path(&path, /*periph*/NULL, sim->path_id,
4369                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4370                 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
4371                 cpi.ccb_h.func_code = XPT_PATH_INQ;
4372                 xpt_action((union ccb *)&cpi);
4373                 xpt_async(AC_PATH_REGISTERED, &path, &cpi);
4374                 xpt_release_path(&path);
4375         }
4376         return (CAM_SUCCESS);
4377 }
4378
4379 int32_t
4380 xpt_bus_deregister(path_id_t pathid)
4381 {
4382         struct cam_path bus_path;
4383         struct cam_ed *device;
4384         struct cam_ed_qinfo *qinfo;
4385         struct cam_devq *devq;
4386         struct cam_periph *periph;
4387         struct cam_sim *ccbsim;
4388         union ccb *work_ccb;
4389         cam_status status;
4390
4391
4392         status = xpt_compile_path(&bus_path, NULL, pathid,
4393                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4394         if (status != CAM_REQ_CMP)
4395                 return (status);
4396
4397         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4398         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4399
4400         /* The SIM may be gone, so use a dummy SIM for any stray operations. */
4401         devq = bus_path.bus->sim->devq;
4402         ccbsim = bus_path.bus->sim;
4403         bus_path.bus->sim = &cam_dead_sim;
4404
4405         /* Execute any pending operations now. */
4406         while ((qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
4407             CAMQ_HEAD)) != NULL ||
4408             (qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
4409             CAMQ_HEAD)) != NULL) {
4410                 do {
4411                         device = qinfo->device;
4412                         work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
4413                         if (work_ccb != NULL) {
4414                                 devq->active_dev = device;
4415                                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
4416                                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
4417                                 (*(ccbsim->sim_action))(ccbsim, work_ccb);
4418                         }
4419
4420                         periph = (struct cam_periph *)camq_remove(&device->drvq,
4421                             CAMQ_HEAD);
4422                         if (periph != NULL)
4423                                 xpt_schedule(periph, periph->pinfo.priority);
4424                 } while (work_ccb != NULL || periph != NULL);
4425         }
4426
4427         /* Make sure all completed CCBs are processed. */
4428         while (!TAILQ_EMPTY(&ccbsim->sim_doneq)) {
4429                 camisr_runqueue(&ccbsim->sim_doneq);
4430
4431                 /* Repeat the async's for the benefit of any new devices. */
4432                 xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4433                 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4434         }
4435
4436         /* Release the reference count held while registered. */
4437         xpt_release_bus(bus_path.bus);
4438         xpt_release_path(&bus_path);
4439
4440         return (CAM_REQ_CMP);
4441 }
4442
4443 static path_id_t
4444 xptnextfreepathid(void)
4445 {
4446         struct cam_eb *bus;
4447         path_id_t pathid;
4448         const char *strval;
4449
4450         pathid = 0;
4451         mtx_lock(&xsoftc.xpt_topo_lock);
4452         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4453 retry:
4454         /* Find an unoccupied pathid */
4455         while (bus != NULL && bus->path_id <= pathid) {
4456                 if (bus->path_id == pathid)
4457                         pathid++;
4458                 bus = TAILQ_NEXT(bus, links);
4459         }
4460         mtx_unlock(&xsoftc.xpt_topo_lock);
4461
4462         /*
4463          * Ensure that this pathid is not reserved for
4464          * a bus that may be registered in the future.
4465          */
4466         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4467                 ++pathid;
4468                 /* Start the search over */
4469                 mtx_lock(&xsoftc.xpt_topo_lock);
4470                 goto retry;
4471         }
4472         return (pathid);
4473 }
4474
4475 static path_id_t
4476 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4477 {
4478         path_id_t pathid;
4479         int i, dunit, val;
4480         char buf[32];
4481         const char *dname;
4482
4483         pathid = CAM_XPT_PATH_ID;
4484         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4485         i = 0;
4486         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4487                 if (strcmp(dname, "scbus")) {
4488                         /* Avoid a bit of foot shooting. */
4489                         continue;
4490                 }
4491                 if (dunit < 0)          /* unwired?! */
4492                         continue;
4493                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4494                         if (sim_bus == val) {
4495                                 pathid = dunit;
4496                                 break;
4497                         }
4498                 } else if (sim_bus == 0) {
4499                         /* Unspecified matches bus 0 */
4500                         pathid = dunit;
4501                         break;
4502                 } else {
4503                         printf("Ambiguous scbus configuration for %s%d "
4504                                "bus %d, cannot wire down.  The kernel "
4505                                "config entry for scbus%d should "
4506                                "specify a controller bus.\n"
4507                                "Scbus will be assigned dynamically.\n",
4508                                sim_name, sim_unit, sim_bus, dunit);
4509                         break;
4510                 }
4511         }
4512
4513         if (pathid == CAM_XPT_PATH_ID)
4514                 pathid = xptnextfreepathid();
4515         return (pathid);
4516 }
4517
4518 void
4519 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4520 {
4521         struct cam_eb *bus;
4522         struct cam_et *target, *next_target;
4523         struct cam_ed *device, *next_device;
4524
4525         mtx_assert(path->bus->sim->mtx, MA_OWNED);
4526
4527         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n"));
4528
4529         /*
4530          * Most async events come from a CAM interrupt context.  In
4531          * a few cases, the error recovery code at the peripheral layer,
4532          * which may run from our SWI or a process context, may signal
4533          * deferred events with a call to xpt_async.
4534          */
4535
4536         bus = path->bus;
4537
4538         if (async_code == AC_BUS_RESET) {
4539                 /* Update our notion of when the last reset occurred */
4540                 microtime(&bus->last_reset);
4541         }
4542
4543         for (target = TAILQ_FIRST(&bus->et_entries);
4544              target != NULL;
4545              target = next_target) {
4546
4547                 next_target = TAILQ_NEXT(target, links);
4548
4549                 if (path->target != target
4550                  && path->target->target_id != CAM_TARGET_WILDCARD
4551                  && target->target_id != CAM_TARGET_WILDCARD)
4552                         continue;
4553
4554                 if (async_code == AC_SENT_BDR) {
4555                         /* Update our notion of when the last reset occurred */
4556                         microtime(&path->target->last_reset);
4557                 }
4558
4559                 for (device = TAILQ_FIRST(&target->ed_entries);
4560                      device != NULL;
4561                      device = next_device) {
4562
4563                         next_device = TAILQ_NEXT(device, links);
4564
4565                         if (path->device != device
4566                          && path->device->lun_id != CAM_LUN_WILDCARD
4567                          && device->lun_id != CAM_LUN_WILDCARD)
4568                                 continue;
4569
4570                         xpt_dev_async(async_code, bus, target,
4571                                       device, async_arg);
4572
4573                         xpt_async_bcast(&device->asyncs, async_code,
4574                                         path, async_arg);
4575                 }
4576         }
4577
4578         /*
4579          * If this wasn't a fully wildcarded async, tell all
4580          * clients that want all async events.
4581          */
4582         if (bus != xpt_periph->path->bus)
4583                 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code,
4584                                 path, async_arg);
4585 }
4586
4587 static void
4588 xpt_async_bcast(struct async_list *async_head,
4589                 u_int32_t async_code,
4590                 struct cam_path *path, void *async_arg)
4591 {
4592         struct async_node *cur_entry;
4593
4594         cur_entry = SLIST_FIRST(async_head);
4595         while (cur_entry != NULL) {
4596                 struct async_node *next_entry;
4597                 /*
4598                  * Grab the next list entry before we call the current
4599                  * entry's callback.  This is because the callback function
4600                  * can delete its async callback entry.
4601                  */
4602                 next_entry = SLIST_NEXT(cur_entry, links);
4603                 if ((cur_entry->event_enable & async_code) != 0)
4604                         cur_entry->callback(cur_entry->callback_arg,
4605                                             async_code, path,
4606                                             async_arg);
4607                 cur_entry = next_entry;
4608         }
4609 }
4610
4611 /*
4612  * Handle any per-device event notifications that require action by the XPT.
4613  */
4614 static void
4615 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target,
4616               struct cam_ed *device, void *async_arg)
4617 {
4618         cam_status status;
4619         struct cam_path newpath;
4620
4621         /*
4622          * We only need to handle events for real devices.
4623          */
4624         if (target->target_id == CAM_TARGET_WILDCARD
4625          || device->lun_id == CAM_LUN_WILDCARD)
4626                 return;
4627
4628         /*
4629          * We need our own path with wildcards expanded to
4630          * handle certain types of events.
4631          */
4632         if ((async_code == AC_SENT_BDR)
4633          || (async_code == AC_BUS_RESET)
4634          || (async_code == AC_INQ_CHANGED))
4635                 status = xpt_compile_path(&newpath, NULL,
4636                                           bus->path_id,
4637                                           target->target_id,
4638                                           device->lun_id);
4639         else
4640                 status = CAM_REQ_CMP_ERR;
4641
4642         if (status == CAM_REQ_CMP) {
4643
4644                 /*
4645                  * Allow transfer negotiation to occur in a
4646                  * tag free environment.
4647                  */
4648                 if (async_code == AC_SENT_BDR
4649                  || async_code == AC_BUS_RESET)
4650                         xpt_toggle_tags(&newpath);
4651
4652                 if (async_code == AC_INQ_CHANGED) {
4653                         /*
4654                          * We've sent a start unit command, or
4655                          * something similar to a device that
4656                          * may have caused its inquiry data to
4657                          * change. So we re-scan the device to
4658                          * refresh the inquiry data for it.
4659                          */
4660                         xpt_scan_lun(newpath.periph, &newpath,
4661                                      CAM_EXPECT_INQ_CHANGE, NULL);
4662                 }
4663                 xpt_release_path(&newpath);
4664         } else if (async_code == AC_LOST_DEVICE) {
4665                 device->flags |= CAM_DEV_UNCONFIGURED;
4666         } else if (async_code == AC_TRANSFER_NEG) {
4667                 struct ccb_trans_settings *settings;
4668
4669                 settings = (struct ccb_trans_settings *)async_arg;
4670                 xpt_set_transfer_settings(settings, device,
4671                                           /*async_update*/TRUE);
4672         }
4673 }
4674
4675 u_int32_t
4676 xpt_freeze_devq(struct cam_path *path, u_int count)
4677 {
4678         struct ccb_hdr *ccbh;
4679
4680         mtx_assert(path->bus->sim->mtx, MA_OWNED);
4681
4682         path->device->qfrozen_cnt += count;
4683
4684         /*
4685          * Mark the last CCB in the queue as needing
4686          * to be requeued if the driver hasn't
4687          * changed it's state yet.  This fixes a race
4688          * where a ccb is just about to be queued to
4689          * a controller driver when it's interrupt routine
4690          * freezes the queue.  To completly close the
4691          * hole, controller drives must check to see
4692          * if a ccb's status is still CAM_REQ_INPROG
4693          * just before they queue
4694          * the CCB.  See ahc_action/ahc_freeze_devq for
4695          * an example.
4696          */
4697         ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq);
4698         if (ccbh && ccbh->status == CAM_REQ_INPROG)
4699                 ccbh->status = CAM_REQUEUE_REQ;
4700         return (path->device->qfrozen_cnt);
4701 }
4702
4703 u_int32_t
4704 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4705 {
4706         mtx_assert(sim->mtx, MA_OWNED);
4707
4708         sim->devq->send_queue.qfrozen_cnt += count;
4709         if (sim->devq->active_dev != NULL) {
4710                 struct ccb_hdr *ccbh;
4711
4712                 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs,
4713                                   ccb_hdr_tailq);
4714                 if (ccbh && ccbh->status == CAM_REQ_INPROG)
4715                         ccbh->status = CAM_REQUEUE_REQ;
4716         }
4717         return (sim->devq->send_queue.qfrozen_cnt);
4718 }
4719
4720 static void
4721 xpt_release_devq_timeout(void *arg)
4722 {
4723         struct cam_ed *device;
4724
4725         device = (struct cam_ed *)arg;
4726
4727         xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE);
4728 }
4729
4730 void
4731 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4732 {
4733         mtx_assert(path->bus->sim->mtx, MA_OWNED);
4734
4735         xpt_release_devq_device(path->device, count, run_queue);
4736 }
4737
4738 static void
4739 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4740 {
4741         int     rundevq;
4742
4743         rundevq = 0;
4744         if (dev->qfrozen_cnt > 0) {
4745
4746                 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count;
4747                 dev->qfrozen_cnt -= count;
4748                 if (dev->qfrozen_cnt == 0) {
4749
4750                         /*
4751                          * No longer need to wait for a successful
4752                          * command completion.
4753                          */
4754                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4755
4756                         /*
4757                          * Remove any timeouts that might be scheduled
4758                          * to release this queue.
4759                          */
4760                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4761                                 callout_stop(&dev->callout);
4762                                 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4763                         }
4764
4765                         /*
4766                          * Now that we are unfrozen schedule the
4767                          * device so any pending transactions are
4768                          * run.
4769                          */
4770                         if ((dev->ccbq.queue.entries > 0)
4771                          && (xpt_schedule_dev_sendq(dev->target->bus, dev))
4772                          && (run_queue != 0)) {
4773                                 rundevq = 1;
4774                         }
4775                 }
4776         }
4777         if (rundevq != 0)
4778                 xpt_run_dev_sendq(dev->target->bus);
4779 }
4780
4781 void
4782 xpt_release_simq(struct cam_sim *sim, int run_queue)
4783 {
4784         struct  camq *sendq;
4785
4786         mtx_assert(sim->mtx, MA_OWNED);
4787
4788         sendq = &(sim->devq->send_queue);
4789         if (sendq->qfrozen_cnt > 0) {
4790
4791                 sendq->qfrozen_cnt--;
4792                 if (sendq->qfrozen_cnt == 0) {
4793                         struct cam_eb *bus;
4794
4795                         /*
4796                          * If there is a timeout scheduled to release this
4797                          * sim queue, remove it.  The queue frozen count is
4798                          * already at 0.
4799                          */
4800                         if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4801                                 callout_stop(&sim->callout);
4802                                 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4803                         }
4804                         bus = xpt_find_bus(sim->path_id);
4805
4806                         if (run_queue) {
4807                                 /*
4808                                  * Now that we are unfrozen run the send queue.
4809                                  */
4810                                 xpt_run_dev_sendq(bus);
4811                         }
4812                         xpt_release_bus(bus);
4813                 }
4814         }
4815 }
4816
4817 /*
4818  * XXX Appears to be unused.
4819  */
4820 static void
4821 xpt_release_simq_timeout(void *arg)
4822 {
4823         struct cam_sim *sim;
4824
4825         sim = (struct cam_sim *)arg;
4826         xpt_release_simq(sim, /* run_queue */ TRUE);
4827 }
4828
4829 void
4830 xpt_done(union ccb *done_ccb)
4831 {
4832         struct cam_sim *sim;
4833
4834         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4835         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) {
4836                 /*
4837                  * Queue up the request for handling by our SWI handler
4838                  * any of the "non-immediate" type of ccbs.
4839                  */
4840                 sim = done_ccb->ccb_h.path->bus->sim;
4841                 switch (done_ccb->ccb_h.path->periph->type) {
4842                 case CAM_PERIPH_BIO:
4843                         TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h,
4844                                           sim_links.tqe);
4845                         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4846                         if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) {
4847                                 mtx_lock(&cam_simq_lock);
4848                                 TAILQ_INSERT_TAIL(&cam_simq, sim,
4849                                                   links);
4850                                 sim->flags |= CAM_SIM_ON_DONEQ;
4851                                 mtx_unlock(&cam_simq_lock);
4852                         }
4853                         if ((done_ccb->ccb_h.path->periph->flags &
4854                             CAM_PERIPH_POLLED) == 0)
4855                                 swi_sched(cambio_ih, 0);
4856                         break;
4857                 default:
4858                         panic("unknown periph type %d",
4859                             done_ccb->ccb_h.path->periph->type);
4860                 }
4861         }
4862 }
4863
4864 union ccb *
4865 xpt_alloc_ccb()
4866 {
4867         union ccb *new_ccb;
4868
4869         new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_ZERO|M_WAITOK);
4870         return (new_ccb);
4871 }
4872
4873 union ccb *
4874 xpt_alloc_ccb_nowait()
4875 {
4876         union ccb *new_ccb;
4877
4878         new_ccb = malloc(sizeof(*new_ccb), M_CAMXPT, M_ZERO|M_NOWAIT);
4879         return (new_ccb);
4880 }
4881
4882 void
4883 xpt_free_ccb(union ccb *free_ccb)
4884 {
4885         free(free_ccb, M_CAMXPT);
4886 }
4887
4888
4889
4890 /* Private XPT functions */
4891
4892 /*
4893  * Get a CAM control block for the caller. Charge the structure to the device
4894  * referenced by the path.  If the this device has no 'credits' then the
4895  * device already has the maximum number of outstanding operations under way
4896  * and we return NULL. If we don't have sufficient resources to allocate more
4897  * ccbs, we also return NULL.
4898  */
4899 static union ccb *
4900 xpt_get_ccb(struct cam_ed *device)
4901 {
4902         union ccb *new_ccb;
4903         struct cam_sim *sim;
4904
4905         sim = device->sim;
4906         if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) {
4907                 new_ccb = xpt_alloc_ccb_nowait();
4908                 if (new_ccb == NULL) {
4909                         return (NULL);
4910                 }
4911                 if ((sim->flags & CAM_SIM_MPSAFE) == 0)
4912                         callout_handle_init(&new_ccb->ccb_h.timeout_ch);
4913                 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h,
4914                                   xpt_links.sle);
4915                 sim->ccb_count++;
4916         }
4917         cam_ccbq_take_opening(&device->ccbq);
4918         SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle);
4919         return (new_ccb);
4920 }
4921
4922 static void
4923 xpt_release_bus(struct cam_eb *bus)
4924 {
4925
4926         if ((--bus->refcount == 0)
4927          && (TAILQ_FIRST(&bus->et_entries) == NULL)) {
4928                 mtx_lock(&xsoftc.xpt_topo_lock);
4929                 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4930                 xsoftc.bus_generation++;
4931                 mtx_unlock(&xsoftc.xpt_topo_lock);
4932                 free(bus, M_CAMXPT);
4933         }
4934 }
4935
4936 static struct cam_et *
4937 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4938 {
4939         struct cam_et *target;
4940
4941         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT, M_NOWAIT);
4942         if (target != NULL) {
4943                 struct cam_et *cur_target;
4944
4945                 TAILQ_INIT(&target->ed_entries);
4946                 target->bus = bus;
4947                 target->target_id = target_id;
4948                 target->refcount = 1;
4949                 target->generation = 0;
4950                 timevalclear(&target->last_reset);
4951                 /*
4952                  * Hold a reference to our parent bus so it
4953                  * will not go away before we do.
4954                  */
4955                 bus->refcount++;
4956
4957                 /* Insertion sort into our bus's target list */
4958                 cur_target = TAILQ_FIRST(&bus->et_entries);
4959                 while (cur_target != NULL && cur_target->target_id < target_id)
4960                         cur_target = TAILQ_NEXT(cur_target, links);
4961
4962                 if (cur_target != NULL) {
4963                         TAILQ_INSERT_BEFORE(cur_target, target, links);
4964                 } else {
4965                         TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4966                 }
4967                 bus->generation++;
4968         }
4969         return (target);
4970 }
4971
4972 static void
4973 xpt_release_target(struct cam_eb *bus, struct cam_et *target)
4974 {
4975
4976         if ((--target->refcount == 0)
4977          && (TAILQ_FIRST(&target->ed_entries) == NULL)) {
4978                 TAILQ_REMOVE(&bus->et_entries, target, links);
4979                 bus->generation++;
4980                 free(target, M_CAMXPT);
4981                 xpt_release_bus(bus);
4982         }
4983 }
4984
4985 static struct cam_ed *
4986 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4987 {
4988         struct     cam_path path;
4989         struct     cam_ed *device;
4990         struct     cam_devq *devq;
4991         cam_status status;
4992
4993         if (SIM_DEAD(bus->sim))
4994                 return (NULL);
4995
4996         /* Make space for us in the device queue on our bus */
4997         devq = bus->sim->devq;
4998         status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1);
4999
5000         if (status != CAM_REQ_CMP) {
5001                 device = NULL;
5002         } else {
5003                 device = (struct cam_ed *)malloc(sizeof(*device),
5004                                                  M_CAMXPT, M_NOWAIT);
5005         }
5006
5007         if (device != NULL) {
5008                 struct cam_ed *cur_device;
5009
5010                 cam_init_pinfo(&device->alloc_ccb_entry.pinfo);
5011                 device->alloc_ccb_entry.device = device;
5012                 cam_init_pinfo(&device->send_ccb_entry.pinfo);
5013                 device->send_ccb_entry.device = device;
5014                 device->target = target;
5015                 device->lun_id = lun_id;
5016                 device->sim = bus->sim;
5017                 /* Initialize our queues */
5018                 if (camq_init(&device->drvq, 0) != 0) {
5019                         free(device, M_CAMXPT);
5020                         return (NULL);
5021                 }
5022                 if (cam_ccbq_init(&device->ccbq,
5023                                   bus->sim->max_dev_openings) != 0) {
5024                         camq_fini(&device->drvq);
5025                         free(device, M_CAMXPT);
5026                         return (NULL);
5027                 }
5028                 SLIST_INIT(&device->asyncs);
5029                 SLIST_INIT(&device->periphs);
5030                 device->generation = 0;
5031                 device->owner = NULL;
5032                 /*
5033                  * Take the default quirk entry until we have inquiry
5034                  * data and can determine a better quirk to use.
5035                  */
5036                 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1];
5037                 bzero(&device->inq_data, sizeof(device->inq_data));
5038                 device->inq_flags = 0;
5039                 device->queue_flags = 0;
5040                 device->serial_num = NULL;
5041                 device->serial_num_len = 0;
5042                 device->qfrozen_cnt = 0;
5043                 device->flags = CAM_DEV_UNCONFIGURED;
5044                 device->tag_delay_count = 0;
5045                 device->tag_saved_openings = 0;
5046                 device->refcount = 1;
5047                 if (bus->sim->flags & CAM_SIM_MPSAFE)
5048                         callout_init_mtx(&device->callout, bus->sim->mtx, 0);
5049                 else
5050                         callout_init_mtx(&device->callout, &Giant, 0);
5051
5052                 /*
5053                  * Hold a reference to our parent target so it
5054                  * will not go away before we do.
5055                  */
5056                 target->refcount++;
5057
5058                 /*
5059                  * XXX should be limited by number of CCBs this bus can
5060                  * do.
5061                  */
5062                 bus->sim->max_ccbs += device->ccbq.devq_openings;
5063                 /* Insertion sort into our target's device list */
5064                 cur_device = TAILQ_FIRST(&target->ed_entries);
5065                 while (cur_device != NULL && cur_device->lun_id < lun_id)
5066                         cur_device = TAILQ_NEXT(cur_device, links);
5067                 if (cur_device != NULL) {
5068                         TAILQ_INSERT_BEFORE(cur_device, device, links);
5069                 } else {
5070                         TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
5071                 }
5072                 target->generation++;
5073                 if (lun_id != CAM_LUN_WILDCARD) {
5074                         xpt_compile_path(&path,
5075                                          NULL,
5076                                          bus->path_id,
5077                                          target->target_id,
5078                                          lun_id);
5079                         xpt_devise_transport(&path);
5080                         xpt_release_path(&path);
5081                 }
5082         }
5083         return (device);
5084 }
5085
5086 static void
5087 xpt_release_device(struct cam_eb *bus, struct cam_et *target,
5088                    struct cam_ed *device)
5089 {
5090
5091         if ((--device->refcount == 0)
5092          && ((device->flags & CAM_DEV_UNCONFIGURED) != 0)) {
5093                 struct cam_devq *devq;
5094
5095                 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX
5096                  || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX)
5097                         panic("Removing device while still queued for ccbs");
5098
5099                 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
5100                                 callout_stop(&device->callout);
5101
5102                 TAILQ_REMOVE(&target->ed_entries, device,links);
5103                 target->generation++;
5104                 bus->sim->max_ccbs -= device->ccbq.devq_openings;
5105                 if (!SIM_DEAD(bus->sim)) {
5106                         /* Release our slot in the devq */
5107                         devq = bus->sim->devq;
5108                         cam_devq_resize(devq, devq->alloc_queue.array_size - 1);
5109                 }
5110                 camq_fini(&device->drvq);
5111                 camq_fini(&device->ccbq.queue);
5112                 free(device, M_CAMXPT);
5113                 xpt_release_target(bus, target);
5114         }
5115 }
5116
5117 static u_int32_t
5118 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
5119 {
5120         int     diff;
5121         int     result;
5122         struct  cam_ed *dev;
5123
5124         dev = path->device;
5125
5126         diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings);
5127         result = cam_ccbq_resize(&dev->ccbq, newopenings);
5128         if (result == CAM_REQ_CMP && (diff < 0)) {
5129                 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED;
5130         }
5131         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5132          || (dev->inq_flags & SID_CmdQue) != 0)
5133                 dev->tag_saved_openings = newopenings;
5134         /* Adjust the global limit */
5135         dev->sim->max_ccbs += diff;
5136         return (result);
5137 }
5138
5139 static struct cam_eb *
5140 xpt_find_bus(path_id_t path_id)
5141 {
5142         struct cam_eb *bus;
5143
5144         mtx_lock(&xsoftc.xpt_topo_lock);
5145         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
5146              bus != NULL;
5147              bus = TAILQ_NEXT(bus, links)) {
5148                 if (bus->path_id == path_id) {
5149                         bus->refcount++;
5150                         break;
5151                 }
5152         }
5153         mtx_unlock(&xsoftc.xpt_topo_lock);
5154         return (bus);
5155 }
5156
5157 static struct cam_et *
5158 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5159 {
5160         struct cam_et *target;
5161
5162         for (target = TAILQ_FIRST(&bus->et_entries);
5163              target != NULL;
5164              target = TAILQ_NEXT(target, links)) {
5165                 if (target->target_id == target_id) {
5166                         target->refcount++;
5167                         break;
5168                 }
5169         }
5170         return (target);
5171 }
5172
5173 static struct cam_ed *
5174 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5175 {
5176         struct cam_ed *device;
5177
5178         for (device = TAILQ_FIRST(&target->ed_entries);
5179              device != NULL;
5180              device = TAILQ_NEXT(device, links)) {
5181                 if (device->lun_id == lun_id) {
5182                         device->refcount++;
5183                         break;
5184                 }
5185         }
5186         return (device);
5187 }
5188
5189 typedef struct {
5190         union   ccb *request_ccb;
5191         struct  ccb_pathinq *cpi;
5192         int     counter;
5193 } xpt_scan_bus_info;
5194
5195 /*
5196  * To start a scan, request_ccb is an XPT_SCAN_BUS ccb.
5197  * As the scan progresses, xpt_scan_bus is used as the
5198  * callback on completion function.
5199  */
5200 static void
5201 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb)
5202 {
5203         CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
5204                   ("xpt_scan_bus\n"));
5205         switch (request_ccb->ccb_h.func_code) {
5206         case XPT_SCAN_BUS:
5207         {
5208                 xpt_scan_bus_info *scan_info;
5209                 union   ccb *work_ccb;
5210                 struct  cam_path *path;
5211                 u_int   i;
5212                 u_int   max_target;
5213                 u_int   initiator_id;
5214
5215                 /* Find out the characteristics of the bus */
5216                 work_ccb = xpt_alloc_ccb_nowait();
5217                 if (work_ccb == NULL) {
5218                         request_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
5219                         xpt_done(request_ccb);
5220                         return;
5221                 }
5222                 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path,
5223                               request_ccb->ccb_h.pinfo.priority);
5224                 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
5225                 xpt_action(work_ccb);
5226                 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
5227                         request_ccb->ccb_h.status = work_ccb->ccb_h.status;
5228                         xpt_free_ccb(work_ccb);
5229                         xpt_done(request_ccb);
5230                         return;
5231                 }
5232
5233                 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) {
5234                         /*
5235                          * Can't scan the bus on an adapter that
5236                          * cannot perform the initiator role.
5237                          */
5238                         request_ccb->ccb_h.status = CAM_REQ_CMP;
5239                         xpt_free_ccb(work_ccb);
5240                         xpt_done(request_ccb);
5241                         return;
5242                 }
5243
5244                 /* Save some state for use while we probe for devices */
5245                 scan_info = (xpt_scan_bus_info *)
5246                     malloc(sizeof(xpt_scan_bus_info), M_CAMXPT, M_NOWAIT);
5247                 scan_info->request_ccb = request_ccb;
5248                 scan_info->cpi = &work_ccb->cpi;
5249
5250                 /* Cache on our stack so we can work asynchronously */
5251                 max_target = scan_info->cpi->max_target;
5252                 initiator_id = scan_info->cpi->initiator_id;
5253
5254
5255                 /*
5256                  * We can scan all targets in parallel, or do it sequentially.
5257                  */
5258                 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) {
5259                         max_target = 0;
5260                         scan_info->counter = 0;
5261                 } else {
5262                         scan_info->counter = scan_info->cpi->max_target + 1;
5263                         if (scan_info->cpi->initiator_id < scan_info->counter) {
5264                                 scan_info->counter--;
5265                         }
5266                 }
5267
5268                 for (i = 0; i <= max_target; i++) {
5269                         cam_status status;
5270                         if (i == initiator_id)
5271                                 continue;
5272
5273                         status = xpt_create_path(&path, xpt_periph,
5274                                                  request_ccb->ccb_h.path_id,
5275                                                  i, 0);
5276                         if (status != CAM_REQ_CMP) {
5277                                 printf("xpt_scan_bus: xpt_create_path failed"
5278                                        " with status %#x, bus scan halted\n",
5279                                        status);
5280                                 free(scan_info, M_CAMXPT);
5281                                 request_ccb->ccb_h.status = status;
5282                                 xpt_free_ccb(work_ccb);
5283                                 xpt_done(request_ccb);
5284                                 break;
5285                         }
5286                         work_ccb = xpt_alloc_ccb_nowait();
5287                         if (work_ccb == NULL) {
5288                                 free(scan_info, M_CAMXPT);
5289                                 xpt_free_path(path);
5290                                 request_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
5291                                 xpt_done(request_ccb);
5292                                 break;
5293                         }
5294                         xpt_setup_ccb(&work_ccb->ccb_h, path,
5295                                       request_ccb->ccb_h.pinfo.priority);
5296                         work_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5297                         work_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5298                         work_ccb->ccb_h.ppriv_ptr0 = scan_info;
5299                         work_ccb->crcn.flags = request_ccb->crcn.flags;
5300                         xpt_action(work_ccb);
5301                 }
5302                 break;
5303         }
5304         case XPT_SCAN_LUN:
5305         {
5306                 cam_status status;
5307                 struct cam_path *path;
5308                 xpt_scan_bus_info *scan_info;
5309                 path_id_t path_id;
5310                 target_id_t target_id;
5311                 lun_id_t lun_id;
5312
5313                 /* Reuse the same CCB to query if a device was really found */
5314                 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0;
5315                 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path,
5316                               request_ccb->ccb_h.pinfo.priority);
5317                 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
5318
5319                 path_id = request_ccb->ccb_h.path_id;
5320                 target_id = request_ccb->ccb_h.target_id;
5321                 lun_id = request_ccb->ccb_h.target_lun;
5322                 xpt_action(request_ccb);
5323
5324                 if (request_ccb->ccb_h.status != CAM_REQ_CMP) {
5325                         struct cam_ed *device;
5326                         struct cam_et *target;
5327                         int phl;
5328
5329                         /*
5330                          * If we already probed lun 0 successfully, or
5331                          * we have additional configured luns on this
5332                          * target that might have "gone away", go onto
5333                          * the next lun.
5334                          */
5335                         target = request_ccb->ccb_h.path->target;
5336                         /*
5337                          * We may touch devices that we don't
5338                          * hold references too, so ensure they
5339                          * don't disappear out from under us.
5340                          * The target above is referenced by the
5341                          * path in the request ccb.
5342                          */
5343                         phl = 0;
5344                         device = TAILQ_FIRST(&target->ed_entries);
5345                         if (device != NULL) {
5346                                 phl = CAN_SRCH_HI_SPARSE(device);
5347                                 if (device->lun_id == 0)
5348                                         device = TAILQ_NEXT(device, links);
5349                         }
5350                         if ((lun_id != 0) || (device != NULL)) {
5351                                 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl)
5352                                         lun_id++;
5353                         }
5354                 } else {
5355                         struct cam_ed *device;
5356
5357                         device = request_ccb->ccb_h.path->device;
5358
5359                         if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) {
5360                                 /* Try the next lun */
5361                                 if (lun_id < (CAM_SCSI2_MAXLUN-1)
5362                                   || CAN_SRCH_HI_DENSE(device))
5363                                         lun_id++;
5364                         }
5365                 }
5366
5367                 /*
5368                  * Free the current request path- we're done with it.
5369                  */
5370                 xpt_free_path(request_ccb->ccb_h.path);
5371
5372                 /*
5373                  * Check to see if we scan any further luns.
5374                  */
5375                 if (lun_id == request_ccb->ccb_h.target_lun
5376                  || lun_id > scan_info->cpi->max_lun) {
5377                         int done;
5378
5379  hop_again:
5380                         done = 0;
5381                         if (scan_info->cpi->hba_misc & PIM_SEQSCAN) {
5382                                 scan_info->counter++;
5383                                 if (scan_info->counter ==
5384                                     scan_info->cpi->initiator_id) {
5385                                         scan_info->counter++;
5386                                 }
5387                                 if (scan_info->counter >=
5388                                     scan_info->cpi->max_target+1) {
5389                                         done = 1;
5390                                 }
5391                         } else {
5392                                 scan_info->counter--;
5393                                 if (scan_info->counter == 0) {
5394                                         done = 1;
5395                                 }
5396                         }
5397                         if (done) {
5398                                 xpt_free_ccb(request_ccb);
5399                                 xpt_free_ccb((union ccb *)scan_info->cpi);
5400                                 request_ccb = scan_info->request_ccb;
5401                                 free(scan_info, M_CAMXPT);
5402                                 request_ccb->ccb_h.status = CAM_REQ_CMP;
5403                                 xpt_done(request_ccb);
5404                                 break;
5405                         }
5406
5407                         if ((scan_info->cpi->hba_misc & PIM_SEQSCAN) == 0) {
5408                                 break;
5409                         }
5410                         status = xpt_create_path(&path, xpt_periph,
5411                             scan_info->request_ccb->ccb_h.path_id,
5412                             scan_info->counter, 0);
5413                         if (status != CAM_REQ_CMP) {
5414                                 printf("xpt_scan_bus: xpt_create_path failed"
5415                                     " with status %#x, bus scan halted\n",
5416                                     status);
5417                                 xpt_free_ccb(request_ccb);
5418                                 xpt_free_ccb((union ccb *)scan_info->cpi);
5419                                 request_ccb = scan_info->request_ccb;
5420                                 free(scan_info, M_CAMXPT);
5421                                 request_ccb->ccb_h.status = status;
5422                                 xpt_done(request_ccb);
5423                                 break;
5424                         }
5425                         xpt_setup_ccb(&request_ccb->ccb_h, path,
5426                             request_ccb->ccb_h.pinfo.priority);
5427                         request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5428                         request_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5429                         request_ccb->ccb_h.ppriv_ptr0 = scan_info;
5430                         request_ccb->crcn.flags =
5431                             scan_info->request_ccb->crcn.flags;
5432                 } else {
5433                         status = xpt_create_path(&path, xpt_periph,
5434                                                  path_id, target_id, lun_id);
5435                         if (status != CAM_REQ_CMP) {
5436                                 printf("xpt_scan_bus: xpt_create_path failed "
5437                                        "with status %#x, halting LUN scan\n",
5438                                        status);
5439                                 goto hop_again;
5440                         }
5441                         xpt_setup_ccb(&request_ccb->ccb_h, path,
5442                                       request_ccb->ccb_h.pinfo.priority);
5443                         request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5444                         request_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5445                         request_ccb->ccb_h.ppriv_ptr0 = scan_info;
5446                         request_ccb->crcn.flags =
5447                                 scan_info->request_ccb->crcn.flags;
5448                 }
5449                 xpt_action(request_ccb);
5450                 break;
5451         }
5452         default:
5453                 break;
5454         }
5455 }
5456
5457 typedef enum {
5458         PROBE_TUR,
5459         PROBE_INQUIRY,  /* this counts as DV0 for Basic Domain Validation */
5460         PROBE_FULL_INQUIRY,
5461         PROBE_MODE_SENSE,
5462         PROBE_SERIAL_NUM,
5463         PROBE_TUR_FOR_NEGOTIATION,
5464         PROBE_INQUIRY_BASIC_DV1,
5465         PROBE_INQUIRY_BASIC_DV2,
5466         PROBE_DV_EXIT
5467 } probe_action;
5468
5469 typedef enum {
5470         PROBE_INQUIRY_CKSUM     = 0x01,
5471         PROBE_SERIAL_CKSUM      = 0x02,
5472         PROBE_NO_ANNOUNCE       = 0x04
5473 } probe_flags;
5474
5475 typedef struct {
5476         TAILQ_HEAD(, ccb_hdr) request_ccbs;
5477         probe_action    action;
5478         union ccb       saved_ccb;
5479         probe_flags     flags;
5480         MD5_CTX         context;
5481         u_int8_t        digest[16];
5482 } probe_softc;
5483
5484 static void
5485 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path,
5486              cam_flags flags, union ccb *request_ccb)
5487 {
5488         struct ccb_pathinq cpi;
5489         cam_status status;
5490         struct cam_path *new_path;
5491         struct cam_periph *old_periph;
5492
5493         CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
5494                   ("xpt_scan_lun\n"));
5495
5496         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
5497         cpi.ccb_h.func_code = XPT_PATH_INQ;
5498         xpt_action((union ccb *)&cpi);
5499
5500         if (cpi.ccb_h.status != CAM_REQ_CMP) {
5501                 if (request_ccb != NULL) {
5502                         request_ccb->ccb_h.status = cpi.ccb_h.status;
5503                         xpt_done(request_ccb);
5504                 }
5505                 return;
5506         }
5507
5508         if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) {
5509                 /*
5510                  * Can't scan the bus on an adapter that
5511                  * cannot perform the initiator role.
5512                  */
5513                 if (request_ccb != NULL) {
5514                         request_ccb->ccb_h.status = CAM_REQ_CMP;
5515                         xpt_done(request_ccb);
5516                 }
5517                 return;
5518         }
5519
5520         if (request_ccb == NULL) {
5521                 request_ccb = malloc(sizeof(union ccb), M_CAMXPT, M_NOWAIT);
5522                 if (request_ccb == NULL) {
5523                         xpt_print(path, "xpt_scan_lun: can't allocate CCB, "
5524                             "can't continue\n");
5525                         return;
5526                 }
5527                 new_path = malloc(sizeof(*new_path), M_CAMXPT, M_NOWAIT);
5528                 if (new_path == NULL) {
5529                         xpt_print(path, "xpt_scan_lun: can't allocate path, "
5530                             "can't continue\n");
5531                         free(request_ccb, M_CAMXPT);
5532                         return;
5533                 }
5534                 status = xpt_compile_path(new_path, xpt_periph,
5535                                           path->bus->path_id,
5536                                           path->target->target_id,
5537                                           path->device->lun_id);
5538
5539                 if (status != CAM_REQ_CMP) {
5540                         xpt_print(path, "xpt_scan_lun: can't compile path, "
5541                             "can't continue\n");
5542                         free(request_ccb, M_CAMXPT);
5543                         free(new_path, M_CAMXPT);
5544                         return;
5545                 }
5546                 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1);
5547                 request_ccb->ccb_h.cbfcnp = xptscandone;
5548                 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5549                 request_ccb->crcn.flags = flags;
5550         }
5551
5552         if ((old_periph = cam_periph_find(path, "probe")) != NULL) {
5553                 probe_softc *softc;
5554
5555                 softc = (probe_softc *)old_periph->softc;
5556                 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5557                                   periph_links.tqe);
5558         } else {
5559                 status = cam_periph_alloc(proberegister, NULL, probecleanup,
5560                                           probestart, "probe",
5561                                           CAM_PERIPH_BIO,
5562                                           request_ccb->ccb_h.path, NULL, 0,
5563                                           request_ccb);
5564
5565                 if (status != CAM_REQ_CMP) {
5566                         xpt_print(path, "xpt_scan_lun: cam_alloc_periph "
5567                             "returned an error, can't continue probe\n");
5568                         request_ccb->ccb_h.status = status;
5569                         xpt_done(request_ccb);
5570                 }
5571         }
5572 }
5573
5574 static void
5575 xptscandone(struct cam_periph *periph, union ccb *done_ccb)
5576 {
5577         xpt_release_path(done_ccb->ccb_h.path);
5578         free(done_ccb->ccb_h.path, M_CAMXPT);
5579         free(done_ccb, M_CAMXPT);
5580 }
5581
5582 static cam_status
5583 proberegister(struct cam_periph *periph, void *arg)
5584 {
5585         union ccb *request_ccb; /* CCB representing the probe request */
5586         cam_status status;
5587         probe_softc *softc;
5588
5589         request_ccb = (union ccb *)arg;
5590         if (periph == NULL) {
5591                 printf("proberegister: periph was NULL!!\n");
5592                 return(CAM_REQ_CMP_ERR);
5593         }
5594
5595         if (request_ccb == NULL) {
5596                 printf("proberegister: no probe CCB, "
5597                        "can't register device\n");
5598                 return(CAM_REQ_CMP_ERR);
5599         }
5600
5601         softc = (probe_softc *)malloc(sizeof(*softc), M_CAMXPT, M_NOWAIT);
5602
5603         if (softc == NULL) {
5604                 printf("proberegister: Unable to probe new device. "
5605                        "Unable to allocate softc\n");
5606                 return(CAM_REQ_CMP_ERR);
5607         }
5608         TAILQ_INIT(&softc->request_ccbs);
5609         TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5610                           periph_links.tqe);
5611         softc->flags = 0;
5612         periph->softc = softc;
5613         status = cam_periph_acquire(periph);
5614         if (status != CAM_REQ_CMP) {
5615                 return (status);
5616         }
5617
5618
5619         /*
5620          * Ensure we've waited at least a bus settle
5621          * delay before attempting to probe the device.
5622          * For HBAs that don't do bus resets, this won't make a difference.
5623          */
5624         cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset,
5625                                       scsi_delay);
5626         probeschedule(periph);
5627         return(CAM_REQ_CMP);
5628 }
5629
5630 static void
5631 probeschedule(struct cam_periph *periph)
5632 {
5633         struct ccb_pathinq cpi;
5634         union ccb *ccb;
5635         probe_softc *softc;
5636
5637         softc = (probe_softc *)periph->softc;
5638         ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
5639
5640         xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
5641         cpi.ccb_h.func_code = XPT_PATH_INQ;
5642         xpt_action((union ccb *)&cpi);
5643
5644         /*
5645          * If a device has gone away and another device, or the same one,
5646          * is back in the same place, it should have a unit attention
5647          * condition pending.  It will not report the unit attention in
5648          * response to an inquiry, which may leave invalid transfer
5649          * negotiations in effect.  The TUR will reveal the unit attention
5650          * condition.  Only send the TUR for lun 0, since some devices
5651          * will get confused by commands other than inquiry to non-existent
5652          * luns.  If you think a device has gone away start your scan from
5653          * lun 0.  This will insure that any bogus transfer settings are
5654          * invalidated.
5655          *
5656          * If we haven't seen the device before and the controller supports
5657          * some kind of transfer negotiation, negotiate with the first
5658          * sent command if no bus reset was performed at startup.  This
5659          * ensures that the device is not confused by transfer negotiation
5660          * settings left over by loader or BIOS action.
5661          */
5662         if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
5663          && (ccb->ccb_h.target_lun == 0)) {
5664                 softc->action = PROBE_TUR;
5665         } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0
5666               && (cpi.hba_misc & PIM_NOBUSRESET) != 0) {
5667                 proberequestdefaultnegotiation(periph);
5668                 softc->action = PROBE_INQUIRY;
5669         } else {
5670                 softc->action = PROBE_INQUIRY;
5671         }
5672
5673         if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE)
5674                 softc->flags |= PROBE_NO_ANNOUNCE;
5675         else
5676                 softc->flags &= ~PROBE_NO_ANNOUNCE;
5677
5678         xpt_schedule(periph, ccb->ccb_h.pinfo.priority);
5679 }
5680
5681 static void
5682 probestart(struct cam_periph *periph, union ccb *start_ccb)
5683 {
5684         /* Probe the device that our peripheral driver points to */
5685         struct ccb_scsiio *csio;
5686         probe_softc *softc;
5687
5688         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n"));
5689
5690         softc = (probe_softc *)periph->softc;
5691         csio = &start_ccb->csio;
5692
5693         switch (softc->action) {
5694         case PROBE_TUR:
5695         case PROBE_TUR_FOR_NEGOTIATION:
5696         case PROBE_DV_EXIT:
5697         {
5698                 scsi_test_unit_ready(csio,
5699                                      /*retries*/4,
5700                                      probedone,
5701                                      MSG_SIMPLE_Q_TAG,
5702                                      SSD_FULL_SIZE,
5703                                      /*timeout*/60000);
5704                 break;
5705         }
5706         case PROBE_INQUIRY:
5707         case PROBE_FULL_INQUIRY:
5708         case PROBE_INQUIRY_BASIC_DV1:
5709         case PROBE_INQUIRY_BASIC_DV2:
5710         {
5711                 u_int inquiry_len;
5712                 struct scsi_inquiry_data *inq_buf;
5713
5714                 inq_buf = &periph->path->device->inq_data;
5715
5716                 /*
5717                  * If the device is currently configured, we calculate an
5718                  * MD5 checksum of the inquiry data, and if the serial number
5719                  * length is greater than 0, add the serial number data
5720                  * into the checksum as well.  Once the inquiry and the
5721                  * serial number check finish, we attempt to figure out
5722                  * whether we still have the same device.
5723                  */
5724                 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
5725
5726                         MD5Init(&softc->context);
5727                         MD5Update(&softc->context, (unsigned char *)inq_buf,
5728                                   sizeof(struct scsi_inquiry_data));
5729                         softc->flags |= PROBE_INQUIRY_CKSUM;
5730                         if (periph->path->device->serial_num_len > 0) {
5731                                 MD5Update(&softc->context,
5732                                           periph->path->device->serial_num,
5733                                           periph->path->device->serial_num_len);
5734                                 softc->flags |= PROBE_SERIAL_CKSUM;
5735                         }
5736                         MD5Final(softc->digest, &softc->context);
5737                 }
5738
5739                 if (softc->action == PROBE_INQUIRY)
5740                         inquiry_len = SHORT_INQUIRY_LENGTH;
5741                 else
5742                         inquiry_len = SID_ADDITIONAL_LENGTH(inq_buf);
5743
5744                 /*
5745                  * Some parallel SCSI devices fail to send an
5746                  * ignore wide residue message when dealing with
5747                  * odd length inquiry requests.  Round up to be
5748                  * safe.
5749                  */
5750                 inquiry_len = roundup2(inquiry_len, 2);
5751
5752                 if (softc->action == PROBE_INQUIRY_BASIC_DV1
5753                  || softc->action == PROBE_INQUIRY_BASIC_DV2) {
5754                         inq_buf = malloc(inquiry_len, M_CAMXPT, M_NOWAIT);
5755                 }
5756                 if (inq_buf == NULL) {
5757                         xpt_print(periph->path, "malloc failure- skipping Basic"
5758                             "Domain Validation\n");
5759                         softc->action = PROBE_DV_EXIT;
5760                         scsi_test_unit_ready(csio,
5761                                              /*retries*/4,
5762                                              probedone,
5763                                              MSG_SIMPLE_Q_TAG,
5764                                              SSD_FULL_SIZE,
5765                                              /*timeout*/60000);
5766                         break;
5767                 }
5768                 scsi_inquiry(csio,
5769                              /*retries*/4,
5770                              probedone,
5771                              MSG_SIMPLE_Q_TAG,
5772                              (u_int8_t *)inq_buf,
5773                              inquiry_len,
5774                              /*evpd*/FALSE,
5775                              /*page_code*/0,
5776                              SSD_MIN_SIZE,
5777                              /*timeout*/60 * 1000);
5778                 break;
5779         }
5780         case PROBE_MODE_SENSE:
5781         {
5782                 void  *mode_buf;
5783                 int    mode_buf_len;
5784
5785                 mode_buf_len = sizeof(struct scsi_mode_header_6)
5786                              + sizeof(struct scsi_mode_blk_desc)
5787                              + sizeof(struct scsi_control_page);
5788                 mode_buf = malloc(mode_buf_len, M_CAMXPT, M_NOWAIT);
5789                 if (mode_buf != NULL) {
5790                         scsi_mode_sense(csio,
5791                                         /*retries*/4,
5792                                         probedone,
5793                                         MSG_SIMPLE_Q_TAG,
5794                                         /*dbd*/FALSE,
5795                                         SMS_PAGE_CTRL_CURRENT,
5796                                         SMS_CONTROL_MODE_PAGE,
5797                                         mode_buf,
5798                                         mode_buf_len,
5799                                         SSD_FULL_SIZE,
5800                                         /*timeout*/60000);
5801                         break;
5802                 }
5803                 xpt_print(periph->path, "Unable to mode sense control page - "
5804                     "malloc failure\n");
5805                 softc->action = PROBE_SERIAL_NUM;
5806         }
5807         /* FALLTHROUGH */
5808         case PROBE_SERIAL_NUM:
5809         {
5810                 struct scsi_vpd_unit_serial_number *serial_buf;
5811                 struct cam_ed* device;
5812
5813                 serial_buf = NULL;
5814                 device = periph->path->device;
5815                 device->serial_num = NULL;
5816                 device->serial_num_len = 0;
5817
5818                 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0)
5819                         serial_buf = (struct scsi_vpd_unit_serial_number *)
5820                                 malloc(sizeof(*serial_buf), M_CAMXPT,
5821                                         M_NOWAIT | M_ZERO);
5822
5823                 if (serial_buf != NULL) {
5824                         scsi_inquiry(csio,
5825                                      /*retries*/4,
5826                                      probedone,
5827                                      MSG_SIMPLE_Q_TAG,
5828                                      (u_int8_t *)serial_buf,
5829                                      sizeof(*serial_buf),
5830                                      /*evpd*/TRUE,
5831                                      SVPD_UNIT_SERIAL_NUMBER,
5832                                      SSD_MIN_SIZE,
5833                                      /*timeout*/60 * 1000);
5834                         break;
5835                 }
5836                 /*
5837                  * We'll have to do without, let our probedone
5838                  * routine finish up for us.
5839                  */
5840                 start_ccb->csio.data_ptr = NULL;
5841                 probedone(periph, start_ccb);
5842                 return;
5843         }
5844         }
5845         xpt_action(start_ccb);
5846 }
5847
5848 static void
5849 proberequestdefaultnegotiation(struct cam_periph *periph)
5850 {
5851         struct ccb_trans_settings cts;
5852
5853         xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1);
5854         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
5855         cts.type = CTS_TYPE_USER_SETTINGS;
5856         xpt_action((union ccb *)&cts);
5857         if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
5858                 return;
5859         }
5860         cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
5861         cts.type = CTS_TYPE_CURRENT_SETTINGS;
5862         xpt_action((union ccb *)&cts);
5863 }
5864
5865 /*
5866  * Backoff Negotiation Code- only pertinent for SPI devices.
5867  */
5868 static int
5869 proberequestbackoff(struct cam_periph *periph, struct cam_ed *device)
5870 {
5871         struct ccb_trans_settings cts;
5872         struct ccb_trans_settings_spi *spi;
5873
5874         memset(&cts, 0, sizeof (cts));
5875         xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1);
5876         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
5877         cts.type = CTS_TYPE_CURRENT_SETTINGS;
5878         xpt_action((union ccb *)&cts);
5879         if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
5880                 if (bootverbose) {
5881                         xpt_print(periph->path,
5882                             "failed to get current device settings\n");
5883                 }
5884                 return (0);
5885         }
5886         if (cts.transport != XPORT_SPI) {
5887                 if (bootverbose) {
5888                         xpt_print(periph->path, "not SPI transport\n");
5889                 }
5890                 return (0);
5891         }
5892         spi = &cts.xport_specific.spi;
5893
5894         /*
5895          * We cannot renegotiate sync rate if we don't have one.
5896          */
5897         if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) {
5898                 if (bootverbose) {
5899                         xpt_print(periph->path, "no sync rate known\n");
5900                 }
5901                 return (0);
5902         }
5903
5904         /*
5905          * We'll assert that we don't have to touch PPR options- the
5906          * SIM will see what we do with period and offset and adjust
5907          * the PPR options as appropriate.
5908          */
5909
5910         /*
5911          * A sync rate with unknown or zero offset is nonsensical.
5912          * A sync period of zero means Async.
5913          */
5914         if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0
5915          || spi->sync_offset == 0 || spi->sync_period == 0) {
5916                 if (bootverbose) {
5917                         xpt_print(periph->path, "no sync rate available\n");
5918                 }
5919                 return (0);
5920         }
5921
5922         if (device->flags & CAM_DEV_DV_HIT_BOTTOM) {
5923                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
5924                     ("hit async: giving up on DV\n"));
5925                 return (0);
5926         }
5927
5928
5929         /*
5930          * Jump sync_period up by one, but stop at 5MHz and fall back to Async.
5931          * We don't try to remember 'last' settings to see if the SIM actually
5932          * gets into the speed we want to set. We check on the SIM telling
5933          * us that a requested speed is bad, but otherwise don't try and
5934          * check the speed due to the asynchronous and handshake nature
5935          * of speed setting.
5936          */
5937         spi->valid = CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_SYNC_OFFSET;
5938         for (;;) {
5939                 spi->sync_period++;
5940                 if (spi->sync_period >= 0xf) {
5941                         spi->sync_period = 0;
5942                         spi->sync_offset = 0;
5943                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
5944                             ("setting to async for DV\n"));
5945                         /*
5946                          * Once we hit async, we don't want to try
5947                          * any more settings.
5948                          */
5949                         device->flags |= CAM_DEV_DV_HIT_BOTTOM;
5950                 } else if (bootverbose) {
5951                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
5952                             ("DV: period 0x%x\n", spi->sync_period));
5953                         printf("setting period to 0x%x\n", spi->sync_period);
5954                 }
5955                 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
5956                 cts.type = CTS_TYPE_CURRENT_SETTINGS;
5957                 xpt_action((union ccb *)&cts);
5958                 if ((cts.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
5959                         break;
5960                 }
5961                 CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
5962                     ("DV: failed to set period 0x%x\n", spi->sync_period));
5963                 if (spi->sync_period == 0) {
5964                         return (0);
5965                 }
5966         }
5967         return (1);
5968 }
5969
5970 static void
5971 probedone(struct cam_periph *periph, union ccb *done_ccb)
5972 {
5973         probe_softc *softc;
5974         struct cam_path *path;
5975         u_int32_t  priority;
5976
5977         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n"));
5978
5979         softc = (probe_softc *)periph->softc;
5980         path = done_ccb->ccb_h.path;
5981         priority = done_ccb->ccb_h.pinfo.priority;
5982
5983         switch (softc->action) {
5984         case PROBE_TUR:
5985         {
5986                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
5987
5988                         if (cam_periph_error(done_ccb, 0,
5989                                              SF_NO_PRINT, NULL) == ERESTART)
5990                                 return;
5991                         else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
5992                                 /* Don't wedge the queue */
5993                                 xpt_release_devq(done_ccb->ccb_h.path,
5994                                                  /*count*/1,
5995                                                  /*run_queue*/TRUE);
5996                 }
5997                 softc->action = PROBE_INQUIRY;
5998                 xpt_release_ccb(done_ccb);
5999                 xpt_schedule(periph, priority);
6000                 return;
6001         }
6002         case PROBE_INQUIRY:
6003         case PROBE_FULL_INQUIRY:
6004         {
6005                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
6006                         struct scsi_inquiry_data *inq_buf;
6007                         u_int8_t periph_qual;
6008
6009                         path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID;
6010                         inq_buf = &path->device->inq_data;
6011
6012                         periph_qual = SID_QUAL(inq_buf);
6013
6014                         switch(periph_qual) {
6015                         case SID_QUAL_LU_CONNECTED:
6016                         {
6017                                 u_int8_t len;
6018
6019                                 /*
6020                                  * We conservatively request only
6021                                  * SHORT_INQUIRY_LEN bytes of inquiry
6022                                  * information during our first try
6023                                  * at sending an INQUIRY. If the device
6024                                  * has more information to give,
6025                                  * perform a second request specifying
6026                                  * the amount of information the device
6027                                  * is willing to give.
6028                                  */
6029                                 len = inq_buf->additional_length
6030                                     + offsetof(struct scsi_inquiry_data,
6031                                                additional_length) + 1;
6032                                 if (softc->action == PROBE_INQUIRY
6033                                  && len > SHORT_INQUIRY_LENGTH) {
6034                                         softc->action = PROBE_FULL_INQUIRY;
6035                                         xpt_release_ccb(done_ccb);
6036                                         xpt_schedule(periph, priority);
6037                                         return;
6038                                 }
6039
6040                                 xpt_find_quirk(path->device);
6041
6042                                 xpt_devise_transport(path);
6043                                 if (INQ_DATA_TQ_ENABLED(inq_buf))
6044                                         softc->action = PROBE_MODE_SENSE;
6045                                 else
6046                                         softc->action = PROBE_SERIAL_NUM;
6047
6048                                 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
6049
6050                                 xpt_release_ccb(done_ccb);
6051                                 xpt_schedule(periph, priority);
6052                                 return;
6053                         }
6054                         default:
6055                                 break;
6056                         }
6057                 } else if (cam_periph_error(done_ccb, 0,
6058                                             done_ccb->ccb_h.target_lun > 0
6059                                             ? SF_RETRY_UA|SF_QUIET_IR
6060                                             : SF_RETRY_UA,
6061                                             &softc->saved_ccb) == ERESTART) {
6062                         return;
6063                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6064                         /* Don't wedge the queue */
6065                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6066                                          /*run_queue*/TRUE);
6067                 }
6068                 /*
6069                  * If we get to this point, we got an error status back
6070                  * from the inquiry and the error status doesn't require
6071                  * automatically retrying the command.  Therefore, the
6072                  * inquiry failed.  If we had inquiry information before
6073                  * for this device, but this latest inquiry command failed,
6074                  * the device has probably gone away.  If this device isn't
6075                  * already marked unconfigured, notify the peripheral
6076                  * drivers that this device is no more.
6077                  */
6078                 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
6079                         /* Send the async notification. */
6080                         xpt_async(AC_LOST_DEVICE, path, NULL);
6081
6082                 xpt_release_ccb(done_ccb);
6083                 break;
6084         }
6085         case PROBE_MODE_SENSE:
6086         {
6087                 struct ccb_scsiio *csio;
6088                 struct scsi_mode_header_6 *mode_hdr;
6089
6090                 csio = &done_ccb->csio;
6091                 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr;
6092                 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
6093                         struct scsi_control_page *page;
6094                         u_int8_t *offset;
6095
6096                         offset = ((u_int8_t *)&mode_hdr[1])
6097                             + mode_hdr->blk_desc_len;
6098                         page = (struct scsi_control_page *)offset;
6099                         path->device->queue_flags = page->queue_flags;
6100                 } else if (cam_periph_error(done_ccb, 0,
6101                                             SF_RETRY_UA|SF_NO_PRINT,
6102                                             &softc->saved_ccb) == ERESTART) {
6103                         return;
6104                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6105                         /* Don't wedge the queue */
6106                         xpt_release_devq(done_ccb->ccb_h.path,
6107                                          /*count*/1, /*run_queue*/TRUE);
6108                 }
6109                 xpt_release_ccb(done_ccb);
6110                 free(mode_hdr, M_CAMXPT);
6111                 softc->action = PROBE_SERIAL_NUM;
6112                 xpt_schedule(periph, priority);
6113                 return;
6114         }
6115         case PROBE_SERIAL_NUM:
6116         {
6117                 struct ccb_scsiio *csio;
6118                 struct scsi_vpd_unit_serial_number *serial_buf;
6119                 u_int32_t  priority;
6120                 int changed;
6121                 int have_serialnum;
6122
6123                 changed = 1;
6124                 have_serialnum = 0;
6125                 csio = &done_ccb->csio;
6126                 priority = done_ccb->ccb_h.pinfo.priority;
6127                 serial_buf =
6128                     (struct scsi_vpd_unit_serial_number *)csio->data_ptr;
6129
6130                 /* Clean up from previous instance of this device */
6131                 if (path->device->serial_num != NULL) {
6132                         free(path->device->serial_num, M_CAMXPT);
6133                         path->device->serial_num = NULL;
6134                         path->device->serial_num_len = 0;
6135                 }
6136
6137                 if (serial_buf == NULL) {
6138                         /*
6139                          * Don't process the command as it was never sent
6140                          */
6141                 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
6142                         && (serial_buf->length > 0)) {
6143
6144                         have_serialnum = 1;
6145                         path->device->serial_num =
6146                                 (u_int8_t *)malloc((serial_buf->length + 1),
6147                                                    M_CAMXPT, M_NOWAIT);
6148                         if (path->device->serial_num != NULL) {
6149                                 bcopy(serial_buf->serial_num,
6150                                       path->device->serial_num,
6151                                       serial_buf->length);
6152                                 path->device->serial_num_len =
6153                                     serial_buf->length;
6154                                 path->device->serial_num[serial_buf->length]
6155                                     = '\0';
6156                         }
6157                 } else if (cam_periph_error(done_ccb, 0,
6158                                             SF_RETRY_UA|SF_NO_PRINT,
6159                                             &softc->saved_ccb) == ERESTART) {
6160                         return;
6161                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6162                         /* Don't wedge the queue */
6163                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6164                                          /*run_queue*/TRUE);
6165                 }
6166
6167                 /*
6168                  * Let's see if we have seen this device before.
6169                  */
6170                 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) {
6171                         MD5_CTX context;
6172                         u_int8_t digest[16];
6173
6174                         MD5Init(&context);
6175
6176                         MD5Update(&context,
6177                                   (unsigned char *)&path->device->inq_data,
6178                                   sizeof(struct scsi_inquiry_data));
6179
6180                         if (have_serialnum)
6181                                 MD5Update(&context, serial_buf->serial_num,
6182                                           serial_buf->length);
6183
6184                         MD5Final(digest, &context);
6185                         if (bcmp(softc->digest, digest, 16) == 0)
6186                                 changed = 0;
6187
6188                         /*
6189                          * XXX Do we need to do a TUR in order to ensure
6190                          *     that the device really hasn't changed???
6191                          */
6192                         if ((changed != 0)
6193                          && ((softc->flags & PROBE_NO_ANNOUNCE) == 0))
6194                                 xpt_async(AC_LOST_DEVICE, path, NULL);
6195                 }
6196                 if (serial_buf != NULL)
6197                         free(serial_buf, M_CAMXPT);
6198
6199                 if (changed != 0) {
6200                         /*
6201                          * Now that we have all the necessary
6202                          * information to safely perform transfer
6203                          * negotiations... Controllers don't perform
6204                          * any negotiation or tagged queuing until
6205                          * after the first XPT_SET_TRAN_SETTINGS ccb is
6206                          * received.  So, on a new device, just retrieve
6207                          * the user settings, and set them as the current
6208                          * settings to set the device up.
6209                          */
6210                         proberequestdefaultnegotiation(periph);
6211                         xpt_release_ccb(done_ccb);
6212
6213                         /*
6214                          * Perform a TUR to allow the controller to
6215                          * perform any necessary transfer negotiation.
6216                          */
6217                         softc->action = PROBE_TUR_FOR_NEGOTIATION;
6218                         xpt_schedule(periph, priority);
6219                         return;
6220                 }
6221                 xpt_release_ccb(done_ccb);
6222                 break;
6223         }
6224         case PROBE_TUR_FOR_NEGOTIATION:
6225         case PROBE_DV_EXIT:
6226                 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6227                         /* Don't wedge the queue */
6228                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6229                                          /*run_queue*/TRUE);
6230                 }
6231                 /*
6232                  * Do Domain Validation for lun 0 on devices that claim
6233                  * to support Synchronous Transfer modes.
6234                  */
6235                 if (softc->action == PROBE_TUR_FOR_NEGOTIATION
6236                  && done_ccb->ccb_h.target_lun == 0
6237                  && (path->device->inq_data.flags & SID_Sync) != 0
6238                  && (path->device->flags & CAM_DEV_IN_DV) == 0) {
6239                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
6240                             ("Begin Domain Validation\n"));
6241                         path->device->flags |= CAM_DEV_IN_DV;
6242                         xpt_release_ccb(done_ccb);
6243                         softc->action = PROBE_INQUIRY_BASIC_DV1;
6244                         xpt_schedule(periph, priority);
6245                         return;
6246                 }
6247                 if (softc->action == PROBE_DV_EXIT) {
6248                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
6249                             ("Leave Domain Validation\n"));
6250                 }
6251                 path->device->flags &=
6252                     ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM);
6253                 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) {
6254                         /* Inform the XPT that a new device has been found */
6255                         done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
6256                         xpt_action(done_ccb);
6257                         xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path,
6258                                   done_ccb);
6259                 }
6260                 xpt_release_ccb(done_ccb);
6261                 break;
6262         case PROBE_INQUIRY_BASIC_DV1:
6263         case PROBE_INQUIRY_BASIC_DV2:
6264         {
6265                 struct scsi_inquiry_data *nbuf;
6266                 struct ccb_scsiio *csio;
6267
6268                 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
6269                         /* Don't wedge the queue */
6270                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
6271                                          /*run_queue*/TRUE);
6272                 }
6273                 csio = &done_ccb->csio;
6274                 nbuf = (struct scsi_inquiry_data *)csio->data_ptr;
6275                 if (bcmp(nbuf, &path->device->inq_data, SHORT_INQUIRY_LENGTH)) {
6276                         xpt_print(path,
6277                             "inquiry data fails comparison at DV%d step\n",
6278                             softc->action == PROBE_INQUIRY_BASIC_DV1? 1 : 2);
6279                         if (proberequestbackoff(periph, path->device)) {
6280                                 path->device->flags &= ~CAM_DEV_IN_DV;
6281                                 softc->action = PROBE_TUR_FOR_NEGOTIATION;
6282                         } else {
6283                                 /* give up */
6284                                 softc->action = PROBE_DV_EXIT;
6285                         }
6286                         free(nbuf, M_CAMXPT);
6287                         xpt_release_ccb(done_ccb);
6288                         xpt_schedule(periph, priority);
6289                         return;
6290                 }
6291                 free(nbuf, M_CAMXPT);
6292                 if (softc->action == PROBE_INQUIRY_BASIC_DV1) {
6293                         softc->action = PROBE_INQUIRY_BASIC_DV2;
6294                         xpt_release_ccb(done_ccb);
6295                         xpt_schedule(periph, priority);
6296                         return;
6297                 }
6298                 if (softc->action == PROBE_DV_EXIT) {
6299                         CAM_DEBUG(periph->path, CAM_DEBUG_INFO,
6300                             ("Leave Domain Validation Successfully\n"));
6301                 }
6302                 path->device->flags &=
6303                     ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM);
6304                 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) {
6305                         /* Inform the XPT that a new device has been found */
6306                         done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
6307                         xpt_action(done_ccb);
6308                         xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path,
6309                                   done_ccb);
6310                 }
6311                 xpt_release_ccb(done_ccb);
6312                 break;
6313         }
6314         }
6315         done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
6316         TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe);
6317         done_ccb->ccb_h.status = CAM_REQ_CMP;
6318         xpt_done(done_ccb);
6319         if (TAILQ_FIRST(&softc->request_ccbs) == NULL) {
6320                 cam_periph_invalidate(periph);
6321                 cam_periph_release(periph);
6322         } else {
6323                 probeschedule(periph);
6324         }
6325 }
6326
6327 static void
6328 probecleanup(struct cam_periph *periph)
6329 {
6330         free(periph->softc, M_CAMXPT);
6331 }
6332
6333 static void
6334 xpt_find_quirk(struct cam_ed *device)
6335 {
6336         caddr_t match;
6337
6338         match = cam_quirkmatch((caddr_t)&device->inq_data,
6339                                (caddr_t)xpt_quirk_table,
6340                                sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table),
6341                                sizeof(*xpt_quirk_table), scsi_inquiry_match);
6342
6343         if (match == NULL)
6344                 panic("xpt_find_quirk: device didn't match wildcard entry!!");
6345
6346         device->quirk = (struct xpt_quirk_entry *)match;
6347 }
6348
6349 static int
6350 sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS)
6351 {
6352         int error, bool;
6353
6354         bool = cam_srch_hi;
6355         error = sysctl_handle_int(oidp, &bool, sizeof(bool), req);
6356         if (error != 0 || req->newptr == NULL)
6357                 return (error);
6358         if (bool == 0 || bool == 1) {
6359                 cam_srch_hi = bool;
6360                 return (0);
6361         } else {
6362                 return (EINVAL);
6363         }
6364 }
6365
6366
6367 static void
6368 xpt_devise_transport(struct cam_path *path)
6369 {
6370         struct ccb_pathinq cpi;
6371         struct ccb_trans_settings cts;
6372         struct scsi_inquiry_data *inq_buf;
6373
6374         /* Get transport information from the SIM */
6375         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
6376         cpi.ccb_h.func_code = XPT_PATH_INQ;
6377         xpt_action((union ccb *)&cpi);
6378
6379         inq_buf = NULL;
6380         if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0)
6381                 inq_buf = &path->device->inq_data;
6382         path->device->protocol = PROTO_SCSI;
6383         path->device->protocol_version =
6384             inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version;
6385         path->device->transport = cpi.transport;
6386         path->device->transport_version = cpi.transport_version;
6387
6388         /*
6389          * Any device not using SPI3 features should
6390          * be considered SPI2 or lower.
6391          */
6392         if (inq_buf != NULL) {
6393                 if (path->device->transport == XPORT_SPI
6394                  && (inq_buf->spi3data & SID_SPI_MASK) == 0
6395                  && path->device->transport_version > 2)
6396                         path->device->transport_version = 2;
6397         } else {
6398                 struct cam_ed* otherdev;
6399
6400                 for (otherdev = TAILQ_FIRST(&path->target->ed_entries);
6401                      otherdev != NULL;
6402                      otherdev = TAILQ_NEXT(otherdev, links)) {
6403                         if (otherdev != path->device)
6404                                 break;
6405                 }
6406
6407                 if (otherdev != NULL) {
6408                         /*
6409                          * Initially assume the same versioning as
6410                          * prior luns for this target.
6411                          */
6412                         path->device->protocol_version =
6413                             otherdev->protocol_version;
6414                         path->device->transport_version =
6415                             otherdev->transport_version;
6416                 } else {
6417                         /* Until we know better, opt for safty */
6418                         path->device->protocol_version = 2;
6419                         if (path->device->transport == XPORT_SPI)
6420                                 path->device->transport_version = 2;
6421                         else
6422                                 path->device->transport_version = 0;
6423                 }
6424         }
6425
6426         /*
6427          * XXX
6428          * For a device compliant with SPC-2 we should be able
6429          * to determine the transport version supported by
6430          * scrutinizing the version descriptors in the
6431          * inquiry buffer.
6432          */
6433
6434         /* Tell the controller what we think */
6435         xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
6436         cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
6437         cts.type = CTS_TYPE_CURRENT_SETTINGS;
6438         cts.transport = path->device->transport;
6439         cts.transport_version = path->device->transport_version;
6440         cts.protocol = path->device->protocol;
6441         cts.protocol_version = path->device->protocol_version;
6442         cts.proto_specific.valid = 0;
6443         cts.xport_specific.valid = 0;
6444         xpt_action((union ccb *)&cts);
6445 }
6446
6447 static void
6448 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device,
6449                           int async_update)
6450 {
6451         struct  ccb_pathinq cpi;
6452         struct  ccb_trans_settings cur_cts;
6453         struct  ccb_trans_settings_scsi *scsi;
6454         struct  ccb_trans_settings_scsi *cur_scsi;
6455         struct  cam_sim *sim;
6456         struct  scsi_inquiry_data *inq_data;
6457
6458         if (device == NULL) {
6459                 cts->ccb_h.status = CAM_PATH_INVALID;
6460                 xpt_done((union ccb *)cts);
6461                 return;
6462         }
6463
6464         if (cts->protocol == PROTO_UNKNOWN
6465          || cts->protocol == PROTO_UNSPECIFIED) {
6466                 cts->protocol = device->protocol;
6467                 cts->protocol_version = device->protocol_version;
6468         }
6469
6470         if (cts->protocol_version == PROTO_VERSION_UNKNOWN
6471          || cts->protocol_version == PROTO_VERSION_UNSPECIFIED)
6472                 cts->protocol_version = device->protocol_version;
6473
6474         if (cts->protocol != device->protocol) {
6475                 xpt_print(cts->ccb_h.path, "Uninitialized Protocol %x:%x?\n",
6476                        cts->protocol, device->protocol);
6477                 cts->protocol = device->protocol;
6478         }
6479
6480         if (cts->protocol_version > device->protocol_version) {
6481                 if (bootverbose) {
6482                         xpt_print(cts->ccb_h.path, "Down reving Protocol "
6483                             "Version from %d to %d?\n", cts->protocol_version,
6484                             device->protocol_version);
6485                 }
6486                 cts->protocol_version = device->protocol_version;
6487         }
6488
6489         if (cts->transport == XPORT_UNKNOWN
6490          || cts->transport == XPORT_UNSPECIFIED) {
6491                 cts->transport = device->transport;
6492                 cts->transport_version = device->transport_version;
6493         }
6494
6495         if (cts->transport_version == XPORT_VERSION_UNKNOWN
6496          || cts->transport_version == XPORT_VERSION_UNSPECIFIED)
6497                 cts->transport_version = device->transport_version;
6498
6499         if (cts->transport != device->transport) {
6500                 xpt_print(cts->ccb_h.path, "Uninitialized Transport %x:%x?\n",
6501                     cts->transport, device->transport);
6502                 cts->transport = device->transport;
6503         }
6504
6505         if (cts->transport_version > device->transport_version) {
6506                 if (bootverbose) {
6507                         xpt_print(cts->ccb_h.path, "Down reving Transport "
6508                             "Version from %d to %d?\n", cts->transport_version,
6509                             device->transport_version);
6510                 }
6511                 cts->transport_version = device->transport_version;
6512         }
6513
6514         sim = cts->ccb_h.path->bus->sim;
6515
6516         /*
6517          * Nothing more of interest to do unless
6518          * this is a device connected via the
6519          * SCSI protocol.
6520          */
6521         if (cts->protocol != PROTO_SCSI) {
6522                 if (async_update == FALSE)
6523                         (*(sim->sim_action))(sim, (union ccb *)cts);
6524                 return;
6525         }
6526
6527         inq_data = &device->inq_data;
6528         scsi = &cts->proto_specific.scsi;
6529         xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1);
6530         cpi.ccb_h.func_code = XPT_PATH_INQ;
6531         xpt_action((union ccb *)&cpi);
6532
6533         /* SCSI specific sanity checking */
6534         if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0
6535          || (INQ_DATA_TQ_ENABLED(inq_data)) == 0
6536          || (device->queue_flags & SCP_QUEUE_DQUE) != 0
6537          || (device->quirk->mintags == 0)) {
6538                 /*
6539                  * Can't tag on hardware that doesn't support tags,
6540                  * doesn't have it enabled, or has broken tag support.
6541                  */
6542                 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6543         }
6544
6545         if (async_update == FALSE) {
6546                 /*
6547                  * Perform sanity checking against what the
6548                  * controller and device can do.
6549                  */
6550                 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1);
6551                 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
6552                 cur_cts.type = cts->type;
6553                 xpt_action((union ccb *)&cur_cts);
6554                 if ((cur_cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
6555                         return;
6556                 }
6557                 cur_scsi = &cur_cts.proto_specific.scsi;
6558                 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) {
6559                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6560                         scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB;
6561                 }
6562                 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0)
6563                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6564         }
6565
6566         /* SPI specific sanity checking */
6567         if (cts->transport == XPORT_SPI && async_update == FALSE) {
6568                 u_int spi3caps;
6569                 struct ccb_trans_settings_spi *spi;
6570                 struct ccb_trans_settings_spi *cur_spi;
6571
6572                 spi = &cts->xport_specific.spi;
6573
6574                 cur_spi = &cur_cts.xport_specific.spi;
6575
6576                 /* Fill in any gaps in what the user gave us */
6577                 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
6578                         spi->sync_period = cur_spi->sync_period;
6579                 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0)
6580                         spi->sync_period = 0;
6581                 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
6582                         spi->sync_offset = cur_spi->sync_offset;
6583                 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0)
6584                         spi->sync_offset = 0;
6585                 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
6586                         spi->ppr_options = cur_spi->ppr_options;
6587                 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0)
6588                         spi->ppr_options = 0;
6589                 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
6590                         spi->bus_width = cur_spi->bus_width;
6591                 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0)
6592                         spi->bus_width = 0;
6593                 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) {
6594                         spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
6595                         spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB;
6596                 }
6597                 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0)
6598                         spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
6599                 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6600                   && (inq_data->flags & SID_Sync) == 0
6601                   && cts->type == CTS_TYPE_CURRENT_SETTINGS)
6602                  || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)
6603                  || (spi->sync_offset == 0)
6604                  || (spi->sync_period == 0)) {
6605                         /* Force async */
6606                         spi->sync_period = 0;
6607                         spi->sync_offset = 0;
6608                 }
6609
6610                 switch (spi->bus_width) {
6611                 case MSG_EXT_WDTR_BUS_32_BIT:
6612                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6613                           || (inq_data->flags & SID_WBus32) != 0
6614                           || cts->type == CTS_TYPE_USER_SETTINGS)
6615                          && (cpi.hba_inquiry & PI_WIDE_32) != 0)
6616                                 break;
6617                         /* Fall Through to 16-bit */
6618                 case MSG_EXT_WDTR_BUS_16_BIT:
6619                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
6620                           || (inq_data->flags & SID_WBus16) != 0
6621                           || cts->type == CTS_TYPE_USER_SETTINGS)
6622                          && (cpi.hba_inquiry & PI_WIDE_16) != 0) {
6623                                 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
6624                                 break;
6625                         }
6626                         /* Fall Through to 8-bit */
6627                 default: /* New bus width?? */
6628                 case MSG_EXT_WDTR_BUS_8_BIT:
6629                         /* All targets can do this */
6630                         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
6631                         break;
6632                 }
6633
6634                 spi3caps = cpi.xport_specific.spi.ppr_options;
6635                 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
6636                  && cts->type == CTS_TYPE_CURRENT_SETTINGS)
6637                         spi3caps &= inq_data->spi3data;
6638
6639                 if ((spi3caps & SID_SPI_CLOCK_DT) == 0)
6640                         spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ;
6641
6642                 if ((spi3caps & SID_SPI_IUS) == 0)
6643                         spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ;
6644
6645                 if ((spi3caps & SID_SPI_QAS) == 0)
6646                         spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ;
6647
6648                 /* No SPI Transfer settings are allowed unless we are wide */
6649                 if (spi->bus_width == 0)
6650                         spi->ppr_options = 0;
6651
6652                 if ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0) {
6653                         /*
6654                          * Can't tag queue without disconnection.
6655                          */
6656                         scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
6657                         scsi->valid |= CTS_SCSI_VALID_TQ;
6658                 }
6659
6660                 /*
6661                  * If we are currently performing tagged transactions to
6662                  * this device and want to change its negotiation parameters,
6663                  * go non-tagged for a bit to give the controller a chance to
6664                  * negotiate unhampered by tag messages.
6665                  */
6666                 if (cts->type == CTS_TYPE_CURRENT_SETTINGS
6667                  && (device->inq_flags & SID_CmdQue) != 0
6668                  && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
6669                  && (spi->flags & (CTS_SPI_VALID_SYNC_RATE|
6670                                    CTS_SPI_VALID_SYNC_OFFSET|
6671                                    CTS_SPI_VALID_BUS_WIDTH)) != 0)
6672                         xpt_toggle_tags(cts->ccb_h.path);
6673         }
6674
6675         if (cts->type == CTS_TYPE_CURRENT_SETTINGS
6676          && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) {
6677                 int device_tagenb;
6678
6679                 /*
6680                  * If we are transitioning from tags to no-tags or
6681                  * vice-versa, we need to carefully freeze and restart
6682                  * the queue so that we don't overlap tagged and non-tagged
6683                  * commands.  We also temporarily stop tags if there is
6684                  * a change in transfer negotiation settings to allow
6685                  * "tag-less" negotiation.
6686                  */
6687                 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6688                  || (device->inq_flags & SID_CmdQue) != 0)
6689                         device_tagenb = TRUE;
6690                 else
6691                         device_tagenb = FALSE;
6692
6693                 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0
6694                   && device_tagenb == FALSE)
6695                  || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0
6696                   && device_tagenb == TRUE)) {
6697
6698                         if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) {
6699                                 /*
6700                                  * Delay change to use tags until after a
6701                                  * few commands have gone to this device so
6702                                  * the controller has time to perform transfer
6703                                  * negotiations without tagged messages getting
6704                                  * in the way.
6705                                  */
6706                                 device->tag_delay_count = CAM_TAG_DELAY_COUNT;
6707                                 device->flags |= CAM_DEV_TAG_AFTER_COUNT;
6708                         } else {
6709                                 struct ccb_relsim crs;
6710
6711                                 xpt_freeze_devq(cts->ccb_h.path, /*count*/1);
6712                                 device->inq_flags &= ~SID_CmdQue;
6713                                 xpt_dev_ccbq_resize(cts->ccb_h.path,
6714                                                     sim->max_dev_openings);
6715                                 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
6716                                 device->tag_delay_count = 0;
6717
6718                                 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path,
6719                                               /*priority*/1);
6720                                 crs.ccb_h.func_code = XPT_REL_SIMQ;
6721                                 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
6722                                 crs.openings
6723                                     = crs.release_timeout
6724                                     = crs.qfrozen_cnt
6725                                     = 0;
6726                                 xpt_action((union ccb *)&crs);
6727                         }
6728                 }
6729         }
6730         if (async_update == FALSE)
6731                 (*(sim->sim_action))(sim, (union ccb *)cts);
6732 }
6733
6734
6735 static void
6736 xpt_toggle_tags(struct cam_path *path)
6737 {
6738         struct cam_ed *dev;
6739
6740         /*
6741          * Give controllers a chance to renegotiate
6742          * before starting tag operations.  We
6743          * "toggle" tagged queuing off then on
6744          * which causes the tag enable command delay
6745          * counter to come into effect.
6746          */
6747         dev = path->device;
6748         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6749          || ((dev->inq_flags & SID_CmdQue) != 0
6750           && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) {
6751                 struct ccb_trans_settings cts;
6752
6753                 xpt_setup_ccb(&cts.ccb_h, path, 1);
6754                 cts.protocol = PROTO_SCSI;
6755                 cts.protocol_version = PROTO_VERSION_UNSPECIFIED;
6756                 cts.transport = XPORT_UNSPECIFIED;
6757                 cts.transport_version = XPORT_VERSION_UNSPECIFIED;
6758                 cts.proto_specific.scsi.flags = 0;
6759                 cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ;
6760                 xpt_set_transfer_settings(&cts, path->device,
6761                                           /*async_update*/TRUE);
6762                 cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB;
6763                 xpt_set_transfer_settings(&cts, path->device,
6764                                           /*async_update*/TRUE);
6765         }
6766 }
6767
6768 static void
6769 xpt_start_tags(struct cam_path *path)
6770 {
6771         struct ccb_relsim crs;
6772         struct cam_ed *device;
6773         struct cam_sim *sim;
6774         int    newopenings;
6775
6776         device = path->device;
6777         sim = path->bus->sim;
6778         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
6779         xpt_freeze_devq(path, /*count*/1);
6780         device->inq_flags |= SID_CmdQue;
6781         if (device->tag_saved_openings != 0)
6782                 newopenings = device->tag_saved_openings;
6783         else
6784                 newopenings = min(device->quirk->maxtags,
6785                                   sim->max_tagged_dev_openings);
6786         xpt_dev_ccbq_resize(path, newopenings);
6787         xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1);
6788         crs.ccb_h.func_code = XPT_REL_SIMQ;
6789         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
6790         crs.openings
6791             = crs.release_timeout
6792             = crs.qfrozen_cnt
6793             = 0;
6794         xpt_action((union ccb *)&crs);
6795 }
6796
6797 static int busses_to_config;
6798 static int busses_to_reset;
6799
6800 static int
6801 xptconfigbuscountfunc(struct cam_eb *bus, void *arg)
6802 {
6803
6804         mtx_assert(bus->sim->mtx, MA_OWNED);
6805
6806         if (bus->path_id != CAM_XPT_PATH_ID) {
6807                 struct cam_path path;
6808                 struct ccb_pathinq cpi;
6809                 int can_negotiate;
6810
6811                 busses_to_config++;
6812                 xpt_compile_path(&path, NULL, bus->path_id,
6813                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
6814                 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
6815                 cpi.ccb_h.func_code = XPT_PATH_INQ;
6816                 xpt_action((union ccb *)&cpi);
6817                 can_negotiate = cpi.hba_inquiry;
6818                 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
6819                 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0
6820                  && can_negotiate)
6821                         busses_to_reset++;
6822                 xpt_release_path(&path);
6823         }
6824
6825         return(1);
6826 }
6827
6828 static int
6829 xptconfigfunc(struct cam_eb *bus, void *arg)
6830 {
6831         struct  cam_path *path;
6832         union   ccb *work_ccb;
6833
6834         mtx_assert(bus->sim->mtx, MA_OWNED);
6835
6836         if (bus->path_id != CAM_XPT_PATH_ID) {
6837                 cam_status status;
6838                 int can_negotiate;
6839
6840                 work_ccb = xpt_alloc_ccb_nowait();
6841                 if (work_ccb == NULL) {
6842                         busses_to_config--;
6843                         xpt_finishconfig(xpt_periph, NULL);
6844                         return(0);
6845                 }
6846                 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id,
6847                                               CAM_TARGET_WILDCARD,
6848                                               CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){
6849                         printf("xptconfigfunc: xpt_create_path failed with "
6850                                "status %#x for bus %d\n", status, bus->path_id);
6851                         printf("xptconfigfunc: halting bus configuration\n");
6852                         xpt_free_ccb(work_ccb);
6853                         busses_to_config--;
6854                         xpt_finishconfig(xpt_periph, NULL);
6855                         return(0);
6856                 }
6857                 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
6858                 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
6859                 xpt_action(work_ccb);
6860                 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
6861                         printf("xptconfigfunc: CPI failed on bus %d "
6862                                "with status %d\n", bus->path_id,
6863                                work_ccb->ccb_h.status);
6864                         xpt_finishconfig(xpt_periph, work_ccb);
6865                         return(1);
6866                 }
6867
6868                 can_negotiate = work_ccb->cpi.hba_inquiry;
6869                 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
6870                 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0
6871                  && (can_negotiate != 0)) {
6872                         xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
6873                         work_ccb->ccb_h.func_code = XPT_RESET_BUS;
6874                         work_ccb->ccb_h.cbfcnp = NULL;
6875                         CAM_DEBUG(path, CAM_DEBUG_SUBTRACE,
6876                                   ("Resetting Bus\n"));
6877                         xpt_action(work_ccb);
6878                         xpt_finishconfig(xpt_periph, work_ccb);
6879                 } else {
6880                         /* Act as though we performed a successful BUS RESET */
6881                         work_ccb->ccb_h.func_code = XPT_RESET_BUS;
6882                         xpt_finishconfig(xpt_periph, work_ccb);
6883                 }
6884         }
6885
6886         return(1);
6887 }
6888
6889 static void
6890 xpt_config(void *arg)
6891 {
6892         /*
6893          * Now that interrupts are enabled, go find our devices
6894          */
6895
6896 #ifdef CAMDEBUG
6897         /* Setup debugging flags and path */
6898 #ifdef CAM_DEBUG_FLAGS
6899         cam_dflags = CAM_DEBUG_FLAGS;
6900 #else /* !CAM_DEBUG_FLAGS */
6901         cam_dflags = CAM_DEBUG_NONE;
6902 #endif /* CAM_DEBUG_FLAGS */
6903 #ifdef CAM_DEBUG_BUS
6904         if (cam_dflags != CAM_DEBUG_NONE) {
6905                 /*
6906                  * Locking is specifically omitted here.  No SIMs have
6907                  * registered yet, so xpt_create_path will only be searching
6908                  * empty lists of targets and devices.
6909                  */
6910                 if (xpt_create_path(&cam_dpath, xpt_periph,
6911                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
6912                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
6913                         printf("xpt_config: xpt_create_path() failed for debug"
6914                                " target %d:%d:%d, debugging disabled\n",
6915                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
6916                         cam_dflags = CAM_DEBUG_NONE;
6917                 }
6918         } else
6919                 cam_dpath = NULL;
6920 #else /* !CAM_DEBUG_BUS */
6921         cam_dpath = NULL;
6922 #endif /* CAM_DEBUG_BUS */
6923 #endif /* CAMDEBUG */
6924
6925         /*
6926          * Scan all installed busses.
6927          */
6928         xpt_for_all_busses(xptconfigbuscountfunc, NULL);
6929
6930         if (busses_to_config == 0) {
6931                 /* Call manually because we don't have any busses */
6932                 xpt_finishconfig(xpt_periph, NULL);
6933         } else  {
6934                 if (busses_to_reset > 0 && scsi_delay >= 2000) {
6935                         printf("Waiting %d seconds for SCSI "
6936                                "devices to settle\n", scsi_delay/1000);
6937                 }
6938                 xpt_for_all_busses(xptconfigfunc, NULL);
6939         }
6940 }
6941
6942 /*
6943  * If the given device only has one peripheral attached to it, and if that
6944  * peripheral is the passthrough driver, announce it.  This insures that the
6945  * user sees some sort of announcement for every peripheral in their system.
6946  */
6947 static int
6948 xptpassannouncefunc(struct cam_ed *device, void *arg)
6949 {
6950         struct cam_periph *periph;
6951         int i;
6952
6953         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
6954              periph = SLIST_NEXT(periph, periph_links), i++);
6955
6956         periph = SLIST_FIRST(&device->periphs);
6957         if ((i == 1)
6958          && (strncmp(periph->periph_name, "pass", 4) == 0))
6959                 xpt_announce_periph(periph, NULL);
6960
6961         return(1);
6962 }
6963
6964 static void
6965 xpt_finishconfig_task(void *context, int pending)
6966 {
6967         struct  periph_driver **p_drv;
6968         int     i;
6969
6970         if (busses_to_config == 0) {
6971                 /* Register all the peripheral drivers */
6972                 /* XXX This will have to change when we have loadable modules */
6973                 p_drv = periph_drivers;
6974                 for (i = 0; p_drv[i] != NULL; i++) {
6975                         (*p_drv[i]->init)();
6976                 }
6977
6978                 /*
6979                  * Check for devices with no "standard" peripheral driver
6980                  * attached.  For any devices like that, announce the
6981                  * passthrough driver so the user will see something.
6982                  */
6983                 xpt_for_all_devices(xptpassannouncefunc, NULL);
6984
6985                 /* Release our hook so that the boot can continue. */
6986                 config_intrhook_disestablish(xsoftc.xpt_config_hook);
6987                 free(xsoftc.xpt_config_hook, M_CAMXPT);
6988                 xsoftc.xpt_config_hook = NULL;
6989         }
6990
6991         free(context, M_CAMXPT);
6992 }
6993
6994 static void
6995 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb)
6996 {
6997         struct  xpt_task *task;
6998
6999         if (done_ccb != NULL) {
7000                 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
7001                           ("xpt_finishconfig\n"));
7002                 switch(done_ccb->ccb_h.func_code) {
7003                 case XPT_RESET_BUS:
7004                         if (done_ccb->ccb_h.status == CAM_REQ_CMP) {
7005                                 done_ccb->ccb_h.func_code = XPT_SCAN_BUS;
7006                                 done_ccb->ccb_h.cbfcnp = xpt_finishconfig;
7007                                 done_ccb->crcn.flags = 0;
7008                                 xpt_action(done_ccb);
7009                                 return;
7010                         }
7011                         /* FALLTHROUGH */
7012                 case XPT_SCAN_BUS:
7013                 default:
7014                         xpt_free_path(done_ccb->ccb_h.path);
7015                         busses_to_config--;
7016                         break;
7017                 }
7018         }
7019
7020         if (busses_to_config == 0) {
7021                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
7022                 if (task != NULL) {
7023                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
7024                         taskqueue_enqueue(taskqueue_thread, &task->task);
7025                 }
7026         }
7027
7028         if (done_ccb != NULL)
7029                 xpt_free_ccb(done_ccb);
7030 }
7031
7032 cam_status
7033 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
7034                    struct cam_path *path)
7035 {
7036         struct ccb_setasync csa;
7037         cam_status status;
7038         int xptpath = 0;
7039
7040         if (path == NULL) {
7041                 mtx_lock(&xsoftc.xpt_lock);
7042                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
7043                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
7044                 if (status != CAM_REQ_CMP) {
7045                         mtx_unlock(&xsoftc.xpt_lock);
7046                         return (status);
7047                 }
7048                 xptpath = 1;
7049         }
7050
7051         xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
7052         csa.ccb_h.func_code = XPT_SASYNC_CB;
7053         csa.event_enable = event;
7054         csa.callback = cbfunc;
7055         csa.callback_arg = cbarg;
7056         xpt_action((union ccb *)&csa);
7057         status = csa.ccb_h.status;
7058         if (xptpath) {
7059                 xpt_free_path(path);
7060                 mtx_unlock(&xsoftc.xpt_lock);
7061         }
7062         return (status);
7063 }
7064
7065 static void
7066 xptaction(struct cam_sim *sim, union ccb *work_ccb)
7067 {
7068         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
7069
7070         switch (work_ccb->ccb_h.func_code) {
7071         /* Common cases first */
7072         case XPT_PATH_INQ:              /* Path routing inquiry */
7073         {
7074                 struct ccb_pathinq *cpi;
7075
7076                 cpi = &work_ccb->cpi;
7077                 cpi->version_num = 1; /* XXX??? */
7078                 cpi->hba_inquiry = 0;
7079                 cpi->target_sprt = 0;
7080                 cpi->hba_misc = 0;
7081                 cpi->hba_eng_cnt = 0;
7082                 cpi->max_target = 0;
7083                 cpi->max_lun = 0;
7084                 cpi->initiator_id = 0;
7085                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
7086                 strncpy(cpi->hba_vid, "", HBA_IDLEN);
7087                 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
7088                 cpi->unit_number = sim->unit_number;
7089                 cpi->bus_id = sim->bus_id;
7090                 cpi->base_transfer_speed = 0;
7091                 cpi->protocol = PROTO_UNSPECIFIED;
7092                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
7093                 cpi->transport = XPORT_UNSPECIFIED;
7094                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
7095                 cpi->ccb_h.status = CAM_REQ_CMP;
7096                 xpt_done(work_ccb);
7097                 break;
7098         }
7099         default:
7100                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
7101                 xpt_done(work_ccb);
7102                 break;
7103         }
7104 }
7105
7106 /*
7107  * The xpt as a "controller" has no interrupt sources, so polling
7108  * is a no-op.
7109  */
7110 static void
7111 xptpoll(struct cam_sim *sim)
7112 {
7113 }
7114
7115 void
7116 xpt_lock_buses(void)
7117 {
7118         mtx_lock(&xsoftc.xpt_topo_lock);
7119 }
7120
7121 void
7122 xpt_unlock_buses(void)
7123 {
7124         mtx_unlock(&xsoftc.xpt_topo_lock);
7125 }
7126
7127 static void
7128 camisr(void *dummy)
7129 {
7130         cam_simq_t queue;
7131         struct cam_sim *sim;
7132
7133         mtx_lock(&cam_simq_lock);
7134         TAILQ_INIT(&queue);
7135         TAILQ_CONCAT(&queue, &cam_simq, links);
7136         mtx_unlock(&cam_simq_lock);
7137
7138         while ((sim = TAILQ_FIRST(&queue)) != NULL) {
7139                 TAILQ_REMOVE(&queue, sim, links);
7140                 CAM_SIM_LOCK(sim);
7141                 sim->flags &= ~CAM_SIM_ON_DONEQ;
7142                 camisr_runqueue(&sim->sim_doneq);
7143                 CAM_SIM_UNLOCK(sim);
7144         }
7145 }
7146
7147 static void
7148 camisr_runqueue(void *V_queue)
7149 {
7150         cam_isrq_t *queue = V_queue;
7151         struct  ccb_hdr *ccb_h;
7152
7153         while ((ccb_h = TAILQ_FIRST(queue)) != NULL) {
7154                 int     runq;
7155
7156                 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe);
7157                 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
7158
7159                 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE,
7160                           ("camisr\n"));
7161
7162                 runq = FALSE;
7163
7164                 if (ccb_h->flags & CAM_HIGH_POWER) {
7165                         struct highpowerlist    *hphead;
7166                         union ccb               *send_ccb;
7167
7168                         mtx_lock(&xsoftc.xpt_lock);
7169                         hphead = &xsoftc.highpowerq;
7170
7171                         send_ccb = (union ccb *)STAILQ_FIRST(hphead);
7172
7173                         /*
7174                          * Increment the count since this command is done.
7175                          */
7176                         xsoftc.num_highpower++;
7177
7178                         /*
7179                          * Any high powered commands queued up?
7180                          */
7181                         if (send_ccb != NULL) {
7182
7183                                 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe);
7184                                 mtx_unlock(&xsoftc.xpt_lock);
7185
7186                                 xpt_release_devq(send_ccb->ccb_h.path,
7187                                                  /*count*/1, /*runqueue*/TRUE);
7188                         } else
7189                                 mtx_unlock(&xsoftc.xpt_lock);
7190                 }
7191
7192                 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
7193                         struct cam_ed *dev;
7194
7195                         dev = ccb_h->path->device;
7196
7197                         cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
7198
7199                         if (!SIM_DEAD(ccb_h->path->bus->sim)) {
7200                                 ccb_h->path->bus->sim->devq->send_active--;
7201                                 ccb_h->path->bus->sim->devq->send_openings++;
7202                         }
7203
7204                         if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
7205                           && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)
7206                          || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
7207                           && (dev->ccbq.dev_active == 0))) {
7208
7209                                 xpt_release_devq(ccb_h->path, /*count*/1,
7210                                                  /*run_queue*/TRUE);
7211                         }
7212
7213                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
7214                          && (--dev->tag_delay_count == 0))
7215                                 xpt_start_tags(ccb_h->path);
7216
7217                         if ((dev->ccbq.queue.entries > 0)
7218                          && (dev->qfrozen_cnt == 0)
7219                          && (device_is_send_queued(dev) == 0)) {
7220                                 runq = xpt_schedule_dev_sendq(ccb_h->path->bus,
7221                                                               dev);
7222                         }
7223                 }
7224
7225                 if (ccb_h->status & CAM_RELEASE_SIMQ) {
7226                         xpt_release_simq(ccb_h->path->bus->sim,
7227                                          /*run_queue*/TRUE);
7228                         ccb_h->status &= ~CAM_RELEASE_SIMQ;
7229                         runq = FALSE;
7230                 }
7231
7232                 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
7233                  && (ccb_h->status & CAM_DEV_QFRZN)) {
7234                         xpt_release_devq(ccb_h->path, /*count*/1,
7235                                          /*run_queue*/TRUE);
7236                         ccb_h->status &= ~CAM_DEV_QFRZN;
7237                 } else if (runq) {
7238                         xpt_run_dev_sendq(ccb_h->path->bus);
7239                 }
7240
7241                 /* Call the peripheral driver's callback */
7242                 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
7243         }
7244 }
7245
7246 static void
7247 dead_sim_action(struct cam_sim *sim, union ccb *ccb)
7248 {
7249
7250         ccb->ccb_h.status = CAM_DEV_NOT_THERE;
7251         xpt_done(ccb);
7252 }
7253
7254 static void
7255 dead_sim_poll(struct cam_sim *sim)
7256 {
7257 }