sys/bus/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  * $FreeBSD: src/sys/cam/cam_xpt.c,v 1.80.2.18 2002/12/09 17:31:55 gibbs Exp $
  30  * $DragonFly: src/sys/bus/cam/cam_xpt.c,v 1.34 2006/12/22 23:12:16 swildner Exp $
  31  */
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/types.h>
  35 #include <sys/malloc.h>
  36 #include <sys/kernel.h>
  37 #include <sys/time.h>
  38 #include <sys/conf.h>
  39 #include <sys/device.h>
  40 #include <sys/fcntl.h>
  41 #include <sys/md5.h>
  42 #include <sys/devicestat.h>
  43 #include <sys/interrupt.h>
  44 #include <sys/bus.h>
  45 #include <sys/thread.h>
  46 #include <sys/thread2.h>
  47
  48 #include <machine/clock.h>
  49
  50 #include "cam.h"
  51 #include "cam_ccb.h"
  52 #include "cam_periph.h"
  53 #include "cam_sim.h"
  54 #include "cam_xpt.h"
  55 #include "cam_xpt_sim.h"
  56 #include "cam_xpt_periph.h"
  57 #include "cam_debug.h"
  58
  59 #include "scsi/scsi_all.h"
  60 #include "scsi/scsi_message.h"
  61 #include "scsi/scsi_pass.h"
  62 #include "opt_cam.h"
  63
  64 /* Datastructures internal to the xpt layer */
  65
  66 /*
  67  * Definition of an async handler callback block.  These are used to add
  68  * SIMs and peripherals to the async callback lists.
  69  */
  70 struct async_node {
  71         SLIST_ENTRY(async_node) links;
  72         u_int32_t       event_enable;   /* Async Event enables */
  73         void            (*callback)(void *arg, u_int32_t code,
  74                                     struct cam_path *path, void *args);
  75         void            *callback_arg;
  76 };
  77
  78 SLIST_HEAD(async_list, async_node);
  79 SLIST_HEAD(periph_list, cam_periph);
  80 static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq;
  81
  82 /*
  83  * This is the maximum number of high powered commands (e.g. start unit)
  84  * that can be outstanding at a particular time.
  85  */
  86 #ifndef CAM_MAX_HIGHPOWER
  87 #define CAM_MAX_HIGHPOWER  4
  88 #endif
  89
  90 /* number of high powered commands that can go through right now */
  91 static int num_highpower = CAM_MAX_HIGHPOWER;
  92
  93 /*
  94  * Structure for queueing a device in a run queue.
  95  * There is one run queue for allocating new ccbs,
  96  * and another for sending ccbs to the controller.
  97  */
  98 struct cam_ed_qinfo {
  99         cam_pinfo pinfo;
 100         struct    cam_ed *device;
 101 };
 102
 103 /*
 104  * The CAM EDT (Existing Device Table) contains the device information for
 105  * all devices for all busses in the system.  The table contains a
 106  * cam_ed structure for each device on the bus.
 107  */
 108 struct cam_ed {
 109         TAILQ_ENTRY(cam_ed) links;
 110         struct  cam_ed_qinfo alloc_ccb_entry;
 111         struct  cam_ed_qinfo send_ccb_entry;
 112         struct  cam_et   *target;
 113         lun_id_t         lun_id;
 114         struct  camq drvq;              /*
 115                                          * Queue of type drivers wanting to do
 116                                          * work on this device.
 117                                          */
 118         struct  cam_ccbq ccbq;          /* Queue of pending ccbs */
 119         struct  async_list asyncs;      /* Async callback info for this B/T/L */
 120         struct  periph_list periphs;    /* All attached devices */
 121         u_int   generation;             /* Generation number */
 122         struct  cam_periph *owner;      /* Peripheral driver's ownership tag */
 123         struct  xpt_quirk_entry *quirk; /* Oddities about this device */
 124                                         /* Storage for the inquiry data */
 125         struct  scsi_inquiry_data inq_data;
 126         u_int8_t         inq_flags;     /*
 127                                          * Current settings for inquiry flags.
 128                                          * This allows us to override settings
 129                                          * like disconnection and tagged
 130                                          * queuing for a device.
 131                                          */
 132         u_int8_t         queue_flags;   /* Queue flags from the control page */
 133         u_int8_t         serial_num_len;
 134         u_int8_t         *serial_num;
 135         u_int32_t        qfrozen_cnt;
 136         u_int32_t        flags;
 137 #define CAM_DEV_UNCONFIGURED            0x01
 138 #define CAM_DEV_REL_TIMEOUT_PENDING     0x02
 139 #define CAM_DEV_REL_ON_COMPLETE         0x04
 140 #define CAM_DEV_REL_ON_QUEUE_EMPTY      0x08
 141 #define CAM_DEV_RESIZE_QUEUE_NEEDED     0x10
 142 #define CAM_DEV_TAG_AFTER_COUNT         0x20
 143 #define CAM_DEV_INQUIRY_DATA_VALID      0x40
 144         u_int32_t        tag_delay_count;
 145 #define CAM_TAG_DELAY_COUNT             5
 146         u_int32_t        refcount;
 147         struct           callout c_handle;
 148 };
 149
 150 /*
 151  * Each target is represented by an ET (Existing Target).  These
 152  * entries are created when a target is successfully probed with an
 153  * identify, and removed when a device fails to respond after a number
 154  * of retries, or a bus rescan finds the device missing.
 155  */
 156 struct cam_et {
 157         TAILQ_HEAD(, cam_ed) ed_entries;
 158         TAILQ_ENTRY(cam_et) links;
 159         struct  cam_eb  *bus;
 160         target_id_t     target_id;
 161         u_int32_t       refcount;
 162         u_int           generation;
 163         struct          timeval last_reset;     /* uptime of last reset */
 164 };
 165
 166 /*
 167  * Each bus is represented by an EB (Existing Bus).  These entries
 168  * are created by calls to xpt_bus_register and deleted by calls to
 169  * xpt_bus_deregister.
 170  */
 171 struct cam_eb {
 172         TAILQ_HEAD(, cam_et) et_entries;
 173         TAILQ_ENTRY(cam_eb)  links;
 174         path_id_t            path_id;
 175         struct cam_sim       *sim;
 176         struct timeval       last_reset;        /* uptime of last reset */
 177         u_int32_t            flags;
 178 #define CAM_EB_RUNQ_SCHEDULED   0x01
 179         u_int32_t            refcount;
 180         u_int                generation;
 181 };
 182
 183 struct cam_path {
 184         struct cam_periph *periph;
 185         struct cam_eb     *bus;
 186         struct cam_et     *target;
 187         struct cam_ed     *device;
 188 };
 189
 190 struct xpt_quirk_entry {
 191         struct scsi_inquiry_pattern inq_pat;
 192         u_int8_t quirks;
 193 #define CAM_QUIRK_NOLUNS        0x01
 194 #define CAM_QUIRK_NOSERIAL      0x02
 195 #define CAM_QUIRK_HILUNS        0x04
 196         u_int mintags;
 197         u_int maxtags;
 198 };
 199 #define CAM_SCSI2_MAXLUN        8
 200
 201 typedef enum {
 202         XPT_FLAG_OPEN           = 0x01
 203 } xpt_flags;
 204
 205 struct xpt_softc {
 206         xpt_flags       flags;
 207         u_int32_t       generation;
 208 };
 209
 210 static const char quantum[] = "QUANTUM";
 211 static const char sony[] = "SONY";
 212 static const char west_digital[] = "WDIGTL";
 213 static const char samsung[] = "SAMSUNG";
 214 static const char seagate[] = "SEAGATE";
 215 static const char microp[] = "MICROP";
 216
 217 static struct xpt_quirk_entry xpt_quirk_table[] =
 218 {
 219         {
 220                 /* Reports QUEUE FULL for temporary resource shortages */
 221                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" },
 222                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 223         },
 224         {
 225                 /* Reports QUEUE FULL for temporary resource shortages */
 226                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" },
 227                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 228         },
 229         {
 230                 /* Reports QUEUE FULL for temporary resource shortages */
 231                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" },
 232                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 233         },
 234         {
 235                 /* Broken tagged queuing drive */
 236                 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" },
 237                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 238         },
 239         {
 240                 /* Broken tagged queuing drive */
 241                 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" },
 242                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 243         },
 244         {
 245                 /* Broken tagged queuing drive */
 246                 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" },
 247                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 248         },
 249         {
 250                 /*
 251                  * Unfortunately, the Quantum Atlas III has the same
 252                  * problem as the Atlas II drives above.
 253                  * Reported by: "Johan Granlund" <johan@granlund.nu>
 254                  *
 255                  * For future reference, the drive with the problem was:
 256                  * QUANTUM QM39100TD-SW N1B0
 257                  *
 258                  * It's possible that Quantum will fix the problem in later
 259                  * firmware revisions.  If that happens, the quirk entry
 260                  * will need to be made specific to the firmware revisions
 261                  * with the problem.
 262                  *
 263                  */
 264                 /* Reports QUEUE FULL for temporary resource shortages */
 265                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" },
 266                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 267         },
 268         {
 269                 /*
 270                  * 18 Gig Atlas III, same problem as the 9G version.
 271                  * Reported by: Andre Albsmeier
 272                  *              <andre.albsmeier@mchp.siemens.de>
 273                  *
 274                  * For future reference, the drive with the problem was:
 275                  * QUANTUM QM318000TD-S N491
 276                  */
 277                 /* Reports QUEUE FULL for temporary resource shortages */
 278                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" },
 279                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 280         },
 281         {
 282                 /*
 283                  * Broken tagged queuing drive
 284                  * Reported by: Bret Ford <bford@uop.cs.uop.edu>
 285                  *         and: Martin Renters <martin@tdc.on.ca>
 286                  */
 287                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" },
 288                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 289         },
 290                 /*
 291                  * The Seagate Medalist Pro drives have very poor write
 292                  * performance with anything more than 2 tags.
 293                  *
 294                  * Reported by:  Paul van der Zwan <paulz@trantor.xs4all.nl>
 295                  * Drive:  <SEAGATE ST36530N 1444>
 296                  *
 297                  * Reported by:  Jeremy Lea <reg@shale.csir.co.za>
 298                  * Drive:  <SEAGATE ST34520W 1281>
 299                  *
 300                  * No one has actually reported that the 9G version
 301                  * (ST39140*) of the Medalist Pro has the same problem, but
 302                  * we're assuming that it does because the 4G and 6.5G
 303                  * versions of the drive are broken.
 304                  */
 305         {
 306                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"},
 307                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 308         },
 309         {
 310                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"},
 311                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 312         },
 313         {
 314                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"},
 315                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 316         },
 317         {
 318                 /*
 319                  * Slow when tagged queueing is enabled.  Write performance
 320                  * steadily drops off with more and more concurrent
 321                  * transactions.  Best sequential write performance with
 322                  * tagged queueing turned off and write caching turned on.
 323                  *
 324                  * PR:  kern/10398
 325                  * Submitted by:  Hideaki Okada <hokada@isl.melco.co.jp>
 326                  * Drive:  DCAS-34330 w/ "S65A" firmware.
 327                  *
 328                  * The drive with the problem had the "S65A" firmware
 329                  * revision, and has also been reported (by Stephen J.
 330                  * Roznowski <sjr@home.net>) for a drive with the "S61A"
 331                  * firmware revision.
 332                  *
 333                  * Although no one has reported problems with the 2 gig
 334                  * version of the DCAS drive, the assumption is that it
 335                  * has the same problems as the 4 gig version.  Therefore
 336                  * this quirk entries disables tagged queueing for all
 337                  * DCAS drives.
 338                  */
 339                 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" },
 340                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 341         },
 342         {
 343                 /* Broken tagged queuing drive */
 344                 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" },
 345                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 346         },
 347         {
 348                 /* Broken tagged queuing drive */
 349                 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" },
 350                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 351         },
 352         {
 353                 /*
 354                  * Broken tagged queuing drive.
 355                  * Submitted by:
 356                  * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp>
 357                  * in PR kern/9535
 358                  */
 359                 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" },
 360                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 361         },
 362         {
 363                 /*
 364                  * Slow when tagged queueing is enabled. (1.5MB/sec versus
 365                  * 8MB/sec.)
 366                  * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
 367                  * Best performance with these drives is achieved with
 368                  * tagged queueing turned off, and write caching turned on.
 369                  */
 370                 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" },
 371                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 372         },
 373         {
 374                 /*
 375                  * Slow when tagged queueing is enabled. (1.5MB/sec versus
 376                  * 8MB/sec.)
 377                  * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
 378                  * Best performance with these drives is achieved with
 379                  * tagged queueing turned off, and write caching turned on.
 380                  */
 381                 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" },
 382                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 383         },
 384         {
 385                 /*
 386                  * Doesn't handle queue full condition correctly,
 387                  * so we need to limit maxtags to what the device
 388                  * can handle instead of determining this automatically.
 389                  */
 390                 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" },
 391                 /*quirks*/0, /*mintags*/2, /*maxtags*/32
 392         },
 393         {
 394                 /* Really only one LUN */
 395                 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" },
 396                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 397         },
 398         {
 399                 /* I can't believe we need a quirk for DPT volumes. */
 400                 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" },
 401                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS,
 402                 /*mintags*/0, /*maxtags*/255
 403         },
 404         {
 405                 /*
 406                  * Many Sony CDROM drives don't like multi-LUN probing.
 407                  */
 408                 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" },
 409                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 410         },
 411         {
 412                 /*
 413                  * This drive doesn't like multiple LUN probing.
 414                  * Submitted by:  Parag Patel <parag@cgt.com>
 415                  */
 416                 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R   CDU9*", "*" },
 417                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 418         },
 419         {
 420                 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" },
 421                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 422         },
 423         {
 424                 /*
 425                  * The 8200 doesn't like multi-lun probing, and probably
 426                  * don't like serial number requests either.
 427                  */
 428                 {
 429                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
 430                         "EXB-8200*", "*"
 431                 },
 432                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 433         },
 434         {
 435                 /*
 436                  * Let's try the same as above, but for a drive that says
 437                  * it's an IPL-6860 but is actually an EXB 8200.
 438                  */
 439                 {
 440                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
 441                         "IPL-6860*", "*"
 442                 },
 443                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 444         },
 445         {
 446                 /*
 447                  * These Hitachi drives don't like multi-lun probing.
 448                  * The PR submitter has a DK319H, but says that the Linux
 449                  * kernel has a similar work-around for the DK312 and DK314,
 450                  * so all DK31* drives are quirked here.
 451                  * PR:            misc/18793
 452                  * Submitted by:  Paul Haddad <paul@pth.com>
 453                  */
 454                 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" },
 455                 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
 456         },
 457         {
 458                 /*
 459                  * This old revision of the TDC3600 is also SCSI-1, and
 460                  * hangs upon serial number probing.
 461                  */
 462                 {
 463                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 464                         " TDC 3600", "U07:"
 465                 },
 466                 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0
 467         },
 468         {
 469                 /*
 470                  * Would repond to all LUNs if asked for.
 471                  */
 472                 {
 473                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER",
 474                         "CP150", "*"
 475                 },
 476                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 477         },
 478         {
 479                 /*
 480                  * Would repond to all LUNs if asked for.
 481                  */
 482                 {
 483                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
 484                         "96X2*", "*"
 485                 },
 486                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 487         },
 488         {
 489                 /* Submitted by: Matthew Dodd <winter@jurai.net> */
 490                 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" },
 491                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 492         },
 493         {
 494                 /* Submitted by: Matthew Dodd <winter@jurai.net> */
 495                 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" },
 496                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 497         },
 498         {
 499                 /* TeraSolutions special settings for TRC-22 RAID */
 500                 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" },
 501                   /*quirks*/0, /*mintags*/55, /*maxtags*/255
 502         },
 503         {
 504                 /* Veritas Storage Appliance */
 505                 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" },
 506                   CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024
 507         },
 508         {
 509                 /*
 510                  * Would respond to all LUNs.  Device type and removable
 511                  * flag are jumper-selectable.
 512                  */
 513                 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix",
 514                   "Tahiti 1", "*"
 515                 },
 516                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 517         },
 518         {
 519                 /* Default tagged queuing parameters for all devices */
 520                 {
 521                   T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED,
 522                   /*vendor*/"*", /*product*/"*", /*revision*/"*"
 523                 },
 524                 /*quirks*/0, /*mintags*/2, /*maxtags*/255
 525         },
 526 };
 527
 528 static const int xpt_quirk_table_size =
 529         sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table);
 530
 531 typedef enum {
 532         DM_RET_COPY             = 0x01,
 533         DM_RET_FLAG_MASK        = 0x0f,
 534         DM_RET_NONE             = 0x00,
 535         DM_RET_STOP             = 0x10,
 536         DM_RET_DESCEND          = 0x20,
 537         DM_RET_ERROR            = 0x30,
 538         DM_RET_ACTION_MASK      = 0xf0
 539 } dev_match_ret;
 540
 541 typedef enum {
 542         XPT_DEPTH_BUS,
 543         XPT_DEPTH_TARGET,
 544         XPT_DEPTH_DEVICE,
 545         XPT_DEPTH_PERIPH
 546 } xpt_traverse_depth;
 547
 548 struct xpt_traverse_config {
 549         xpt_traverse_depth      depth;
 550         void                    *tr_func;
 551         void                    *tr_arg;
 552 };
 553
 554 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 555 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 556 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 557 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 558 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 559
 560 /* Transport layer configuration information */
 561 static struct xpt_softc xsoftc;
 562
 563 /* Queues for our software interrupt handler */
 564 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t;
 565 static cam_isrq_t cam_bioq;
 566 static cam_isrq_t cam_netq;
 567
 568 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */
 569 static SLIST_HEAD(,ccb_hdr) ccb_freeq;
 570 static u_int xpt_max_ccbs;      /*
 571                                  * Maximum size of ccb pool.  Modified as
 572                                  * devices are added/removed or have their
 573                                  * opening counts changed.
 574                                  */
 575 static u_int xpt_ccb_count;     /* Current count of allocated ccbs */
 576
 577 struct cam_periph *xpt_periph;
 578
 579 static periph_init_t xpt_periph_init;
 580
 581 static periph_init_t probe_periph_init;
 582
 583 static struct periph_driver xpt_driver =
 584 {
 585         xpt_periph_init, "xpt",
 586         TAILQ_HEAD_INITIALIZER(xpt_driver.units)
 587 };
 588
 589 static struct periph_driver probe_driver =
 590 {
 591         probe_periph_init, "probe",
 592         TAILQ_HEAD_INITIALIZER(probe_driver.units)
 593 };
 594
 595 DATA_SET(periphdriver_set, xpt_driver);
 596 DATA_SET(periphdriver_set, probe_driver);
 597
 598 #define XPT_CDEV_MAJOR 104
 599
 600 static d_open_t xptopen;
 601 static d_close_t xptclose;
 602 static d_ioctl_t xptioctl;
 603
 604 static struct dev_ops xpt_ops = {
 605         { "xpt", XPT_CDEV_MAJOR, 0 },
 606         .d_open = xptopen,
 607         .d_close = xptclose,
 608         .d_ioctl = xptioctl
 609 };
 610
 611 static struct intr_config_hook *xpt_config_hook;
 612
 613 /* Registered busses */
 614 static TAILQ_HEAD(,cam_eb) xpt_busses;
 615 static u_int bus_generation;
 616
 617 /* Storage for debugging datastructures */
 618 #ifdef  CAMDEBUG
 619 struct cam_path *cam_dpath;
 620 u_int32_t cam_dflags;
 621 u_int32_t cam_debug_delay;
 622 #endif
 623
 624 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG)
 625 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS"
 626 #endif
 627
 628 /*
 629  * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG
 630  * enabled.  Also, the user must have either none, or all of CAM_DEBUG_BUS,
 631  * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified.
 632  */
 633 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \
 634     || defined(CAM_DEBUG_LUN)
 635 #ifdef CAMDEBUG
 636 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \
 637     || !defined(CAM_DEBUG_LUN)
 638 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \
 639         and CAM_DEBUG_LUN"
 640 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */
 641 #else /* !CAMDEBUG */
 642 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options"
 643 #endif /* CAMDEBUG */
 644 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */
 645
 646 /* Our boot-time initialization hook */
 647 static void     xpt_init(void *);
 648 SYSINIT(cam, SI_SUB_CONFIGURE, SI_ORDER_SECOND, xpt_init, NULL);
 649
 650 static cam_status       xpt_compile_path(struct cam_path *new_path,
 651                                          struct cam_periph *perph,
 652                                          path_id_t path_id,
 653                                          target_id_t target_id,
 654                                          lun_id_t lun_id);
 655
 656 static void             xpt_release_path(struct cam_path *path);
 657
 658 static void             xpt_async_bcast(struct async_list *async_head,
 659                                         u_int32_t async_code,
 660                                         struct cam_path *path,
 661                                         void *async_arg);
 662 static void             xpt_dev_async(u_int32_t async_code,
 663                                       struct cam_eb *bus,
 664                                       struct cam_et *target,
 665                                       struct cam_ed *device,
 666                                       void *async_arg);
 667 static path_id_t xptnextfreepathid(void);
 668 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 669 static union ccb *xpt_get_ccb(struct cam_ed *device);
 670 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 671                                   u_int32_t new_priority);
 672 static void      xpt_run_dev_allocq(struct cam_eb *bus);
 673 static void      xpt_run_dev_sendq(struct cam_eb *bus);
 674 static timeout_t xpt_release_devq_timeout;
 675 static void      xpt_release_bus(struct cam_eb *bus);
 676 static void      xpt_release_devq_device(struct cam_ed *dev, u_int count,
 677                                          int run_queue);
 678 static struct cam_et*
 679                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 680 static void      xpt_release_target(struct cam_eb *bus, struct cam_et *target);
 681 static struct cam_ed*
 682                  xpt_alloc_device(struct cam_eb *bus, struct cam_et *target,
 683                                   lun_id_t lun_id);
 684 static void      xpt_release_device(struct cam_eb *bus, struct cam_et *target,
 685                                     struct cam_ed *device);
 686 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings);
 687 static struct cam_eb*
 688                  xpt_find_bus(path_id_t path_id);
 689 static struct cam_et*
 690                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 691 static struct cam_ed*
 692                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 693 static void      xpt_scan_bus(struct cam_periph *periph, union ccb *ccb);
 694 static void      xpt_scan_lun(struct cam_periph *periph,
 695                               struct cam_path *path, cam_flags flags,
 696                               union ccb *ccb);
 697 static void      xptscandone(struct cam_periph *periph, union ccb *done_ccb);
 698 static xpt_busfunc_t    xptconfigbuscountfunc;
 699 static xpt_busfunc_t    xptconfigfunc;
 700 static void      xpt_config(void *arg);
 701 static xpt_devicefunc_t xptpassannouncefunc;
 702 static void      xpt_finishconfig(struct cam_periph *periph, union ccb *ccb);
 703 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 704 static void      xptpoll(struct cam_sim *sim);
 705 static inthand2_t swi_camnet;
 706 static inthand2_t swi_cambio;
 707 static void      camisr(cam_isrq_t *queue);
 708 #if 0
 709 static void      xptstart(struct cam_periph *periph, union ccb *work_ccb);
 710 static void      xptasync(struct cam_periph *periph,
 711                           u_int32_t code, cam_path *path);
 712 #endif
 713 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 714                                     int num_patterns, struct cam_eb *bus);
 715 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 716                                        int num_patterns, struct cam_ed *device);
 717 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 718                                        int num_patterns,
 719                                        struct cam_periph *periph);
 720 static xpt_busfunc_t    xptedtbusfunc;
 721 static xpt_targetfunc_t xptedttargetfunc;
 722 static xpt_devicefunc_t xptedtdevicefunc;
 723 static xpt_periphfunc_t xptedtperiphfunc;
 724 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 725 static xpt_periphfunc_t xptplistperiphfunc;
 726 static int              xptedtmatch(struct ccb_dev_match *cdm);
 727 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 728 static int              xptbustraverse(struct cam_eb *start_bus,
 729                                        xpt_busfunc_t *tr_func, void *arg);
 730 static int              xpttargettraverse(struct cam_eb *bus,
 731                                           struct cam_et *start_target,
 732                                           xpt_targetfunc_t *tr_func, void *arg);
 733 static int              xptdevicetraverse(struct cam_et *target,
 734                                           struct cam_ed *start_device,
 735                                           xpt_devicefunc_t *tr_func, void *arg);
 736 static int              xptperiphtraverse(struct cam_ed *device,
 737                                           struct cam_periph *start_periph,
 738                                           xpt_periphfunc_t *tr_func, void *arg);
 739 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 740                                         xpt_pdrvfunc_t *tr_func, void *arg);
 741 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 742                                             struct cam_periph *start_periph,
 743                                             xpt_periphfunc_t *tr_func,
 744                                             void *arg);
 745 static xpt_busfunc_t    xptdefbusfunc;
 746 static xpt_targetfunc_t xptdeftargetfunc;
 747 static xpt_devicefunc_t xptdefdevicefunc;
 748 static xpt_periphfunc_t xptdefperiphfunc;
 749 static int              xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg);
 750 #ifdef notusedyet
 751 static int              xpt_for_all_targets(xpt_targetfunc_t *tr_func,
 752                                             void *arg);
 753 #endif
 754 static int              xpt_for_all_devices(xpt_devicefunc_t *tr_func,
 755                                             void *arg);
 756 #ifdef notusedyet
 757 static int              xpt_for_all_periphs(xpt_periphfunc_t *tr_func,
 758                                             void *arg);
 759 #endif
 760 static xpt_devicefunc_t xptsetasyncfunc;
 761 static xpt_busfunc_t    xptsetasyncbusfunc;
 762 static cam_status       xptregister(struct cam_periph *periph,
 763                                     void *arg);
 764 static cam_status       proberegister(struct cam_periph *periph,
 765                                       void *arg);
 766 static void      probeschedule(struct cam_periph *probe_periph);
 767 static void      probestart(struct cam_periph *periph, union ccb *start_ccb);
 768 static void      proberequestdefaultnegotiation(struct cam_periph *periph);
 769 static void      probedone(struct cam_periph *periph, union ccb *done_ccb);
 770 static void      probecleanup(struct cam_periph *periph);
 771 static void      xpt_find_quirk(struct cam_ed *device);
 772 static void      xpt_set_transfer_settings(struct ccb_trans_settings *cts,
 773                                            struct cam_ed *device,
 774                                            int async_update);
 775 static void      xpt_toggle_tags(struct cam_path *path);
 776 static void      xpt_start_tags(struct cam_path *path);
 777 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus,
 778                                             struct cam_ed *dev);
 779 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus,
 780                                            struct cam_ed *dev);
 781 static __inline int periph_is_queued(struct cam_periph *periph);
 782 static __inline int device_is_alloc_queued(struct cam_ed *device);
 783 static __inline int device_is_send_queued(struct cam_ed *device);
 784 static __inline int dev_allocq_is_runnable(struct cam_devq *devq);
 785
 786 static __inline int
 787 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev)
 788 {
 789         int retval;
 790
 791         if (bus->sim->devq && dev->ccbq.devq_openings > 0) {
 792                 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) {
 793                         cam_ccbq_resize(&dev->ccbq,
 794                                         dev->ccbq.dev_openings
 795                                         + dev->ccbq.dev_active);
 796                         dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED;
 797                 }
 798                 /*
 799                  * The priority of a device waiting for CCB resources
 800                  * is that of the the highest priority peripheral driver
 801                  * enqueued.
 802                  */
 803                 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue,
 804                                           &dev->alloc_ccb_entry.pinfo,
 805                                           CAMQ_GET_HEAD(&dev->drvq)->priority);
 806         } else {
 807                 retval = 0;
 808         }
 809
 810         return (retval);
 811 }
 812
 813 static __inline int
 814 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev)
 815 {
 816         int     retval;
 817
 818         if (bus->sim->devq && dev->ccbq.dev_openings > 0) {
 819                 /*
 820                  * The priority of a device waiting for controller
 821                  * resources is that of the the highest priority CCB
 822                  * enqueued.
 823                  */
 824                 retval =
 825                     xpt_schedule_dev(&bus->sim->devq->send_queue,
 826                                      &dev->send_ccb_entry.pinfo,
 827                                      CAMQ_GET_HEAD(&dev->ccbq.queue)->priority);
 828         } else {
 829                 retval = 0;
 830         }
 831         return (retval);
 832 }
 833
 834 static __inline int
 835 periph_is_queued(struct cam_periph *periph)
 836 {
 837         return (periph->pinfo.index != CAM_UNQUEUED_INDEX);
 838 }
 839
 840 static __inline int
 841 device_is_alloc_queued(struct cam_ed *device)
 842 {
 843         return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
 844 }
 845
 846 static __inline int
 847 device_is_send_queued(struct cam_ed *device)
 848 {
 849         return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
 850 }
 851
 852 static __inline int
 853 dev_allocq_is_runnable(struct cam_devq *devq)
 854 {
 855         /*
 856          * Have work to do.
 857          * Have space to do more work.
 858          * Allowed to do work.
 859          */
 860         return ((devq->alloc_queue.qfrozen_cnt == 0)
 861              && (devq->alloc_queue.entries > 0)
 862              && (devq->alloc_openings > 0));
 863 }
 864
 865 static void
 866 xpt_periph_init(void)
 867 {
 868         dev_ops_add(&xpt_ops, 0, 0);
 869         make_dev(&xpt_ops, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 870 }
 871
 872 static void
 873 probe_periph_init(void)
 874 {
 875 }
 876
 877
 878 static void
 879 xptdone(struct cam_periph *periph, union ccb *done_ccb)
 880 {
 881         /* Caller will release the CCB */
 882         wakeup(&done_ccb->ccb_h.cbfcnp);
 883 }
 884
 885 static int
 886 xptopen(struct dev_open_args *ap)
 887 {
 888         cdev_t dev = ap->a_head.a_dev;
 889         int unit;
 890
 891         unit = minor(dev) & 0xff;
 892
 893         /*
 894          * Only allow read-write access.
 895          */
 896         if (((ap->a_oflags & FWRITE) == 0) || ((ap->a_oflags & FREAD) == 0))
 897                 return(EPERM);
 898
 899         /*
 900          * We don't allow nonblocking access.
 901          */
 902         if ((ap->a_oflags & O_NONBLOCK) != 0) {
 903                 kprintf("xpt%d: can't do nonblocking access\n", unit);
 904                 return(ENODEV);
 905         }
 906
 907         /*
 908          * We only have one transport layer right now.  If someone accesses
 909          * us via something other than minor number 1, point out their
 910          * mistake.
 911          */
 912         if (unit != 0) {
 913                 kprintf("xptopen: got invalid xpt unit %d\n", unit);
 914                 return(ENXIO);
 915         }
 916
 917         /* Mark ourselves open */
 918         xsoftc.flags |= XPT_FLAG_OPEN;
 919
 920         return(0);
 921 }
 922
 923 static int
 924 xptclose(struct dev_close_args *ap)
 925 {
 926         cdev_t dev = ap->a_head.a_dev;
 927         int unit;
 928
 929         unit = minor(dev) & 0xff;
 930
 931         /*
 932          * We only have one transport layer right now.  If someone accesses
 933          * us via something other than minor number 1, point out their
 934          * mistake.
 935          */
 936         if (unit != 0) {
 937                 kprintf("xptclose: got invalid xpt unit %d\n", unit);
 938                 return(ENXIO);
 939         }
 940
 941         /* Mark ourselves closed */
 942         xsoftc.flags &= ~XPT_FLAG_OPEN;
 943
 944         return(0);
 945 }
 946
 947 static int
 948 xptioctl(struct dev_ioctl_args *ap)
 949 {
 950         cdev_t dev = ap->a_head.a_dev;
 951         int unit, error;
 952
 953         error = 0;
 954         unit = minor(dev) & 0xff;
 955
 956         /*
 957          * We only have one transport layer right now.  If someone accesses
 958          * us via something other than minor number 1, point out their
 959          * mistake.
 960          */
 961         if (unit != 0) {
 962                 kprintf("xptioctl: got invalid xpt unit %d\n", unit);
 963                 return(ENXIO);
 964         }
 965
 966         switch(ap->a_cmd) {
 967         /*
 968          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 969          * to accept CCB types that don't quite make sense to send through a
 970          * passthrough driver.
 971          */
 972         case CAMIOCOMMAND: {
 973                 union ccb *ccb;
 974                 union ccb *inccb;
 975
 976                 inccb = (union ccb *)ap->a_data;
 977
 978                 switch(inccb->ccb_h.func_code) {
 979                 case XPT_SCAN_BUS:
 980                 case XPT_RESET_BUS:
 981                         if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD)
 982                          || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) {
 983                                 error = EINVAL;
 984                                 break;
 985                         }
 986                         /* FALLTHROUGH */
 987                 case XPT_PATH_INQ:
 988                 case XPT_ENG_INQ:
 989                 case XPT_SCAN_LUN:
 990
 991                         ccb = xpt_alloc_ccb();
 992
 993                         /*
 994                          * Create a path using the bus, target, and lun the
 995                          * user passed in.
 996                          */
 997                         if (xpt_create_path(&ccb->ccb_h.path, xpt_periph,
 998                                             inccb->ccb_h.path_id,
 999                                             inccb->ccb_h.target_id,
1000                                             inccb->ccb_h.target_lun) !=
1001                                             CAM_REQ_CMP){
1002                                 error = EINVAL;
1003                                 xpt_free_ccb(ccb);
1004                                 break;
1005                         }
1006                         /* Ensure all of our fields are correct */
1007                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
1008                                       inccb->ccb_h.pinfo.priority);
1009                         xpt_merge_ccb(ccb, inccb);
1010                         ccb->ccb_h.cbfcnp = xptdone;
1011                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
1012                         bcopy(ccb, inccb, sizeof(union ccb));
1013                         xpt_free_path(ccb->ccb_h.path);
1014                         xpt_free_ccb(ccb);
1015                         break;
1016
1017                 case XPT_DEBUG: {
1018                         union ccb ccb;
1019
1020                         /*
1021                          * This is an immediate CCB, so it's okay to
1022                          * allocate it on the stack.
1023                          */
1024
1025                         /*
1026                          * Create a path using the bus, target, and lun the
1027                          * user passed in.
1028                          */
1029                         if (xpt_create_path(&ccb.ccb_h.path, xpt_periph,
1030                                             inccb->ccb_h.path_id,
1031                                             inccb->ccb_h.target_id,
1032                                             inccb->ccb_h.target_lun) !=
1033                                             CAM_REQ_CMP){
1034                                 error = EINVAL;
1035                                 break;
1036                         }
1037                         /* Ensure all of our fields are correct */
1038                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
1039                                       inccb->ccb_h.pinfo.priority);
1040                         xpt_merge_ccb(&ccb, inccb);
1041                         ccb.ccb_h.cbfcnp = xptdone;
1042                         xpt_action(&ccb);
1043                         bcopy(&ccb, inccb, sizeof(union ccb));
1044                         xpt_free_path(ccb.ccb_h.path);
1045                         break;
1046
1047                 }
1048                 case XPT_DEV_MATCH: {
1049                         struct cam_periph_map_info mapinfo;
1050                         struct cam_path *old_path;
1051
1052                         /*
1053                          * We can't deal with physical addresses for this
1054                          * type of transaction.
1055                          */
1056                         if (inccb->ccb_h.flags & CAM_DATA_PHYS) {
1057                                 error = EINVAL;
1058                                 break;
1059                         }
1060
1061                         /*
1062                          * Save this in case the caller had it set to
1063                          * something in particular.
1064                          */
1065                         old_path = inccb->ccb_h.path;
1066
1067                         /*
1068                          * We really don't need a path for the matching
1069                          * code.  The path is needed because of the
1070                          * debugging statements in xpt_action().  They
1071                          * assume that the CCB has a valid path.
1072                          */
1073                         inccb->ccb_h.path = xpt_periph->path;
1074
1075                         bzero(&mapinfo, sizeof(mapinfo));
1076
1077                         /*
1078                          * Map the pattern and match buffers into kernel
1079                          * virtual address space.
1080                          */
1081                         error = cam_periph_mapmem(inccb, &mapinfo);
1082
1083                         if (error) {
1084                                 inccb->ccb_h.path = old_path;
1085                                 break;
1086                         }
1087
1088                         /*
1089                          * This is an immediate CCB, we can send it on directly.
1090                          */
1091                         xpt_action(inccb);
1092
1093                         /*
1094                          * Map the buffers back into user space.
1095                          */
1096                         cam_periph_unmapmem(inccb, &mapinfo);
1097
1098                         inccb->ccb_h.path = old_path;
1099
1100                         error = 0;
1101                         break;
1102                 }
1103                 default:
1104                         error = ENOTSUP;
1105                         break;
1106                 }
1107                 break;
1108         }
1109         /*
1110          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
1111          * with the periphal driver name and unit name filled in.  The other
1112          * fields don't really matter as input.  The passthrough driver name
1113          * ("pass"), and unit number are passed back in the ccb.  The current
1114          * device generation number, and the index into the device peripheral
1115          * driver list, and the status are also passed back.  Note that
1116          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
1117          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
1118          * (or rather should be) impossible for the device peripheral driver
1119          * list to change since we look at the whole thing in one pass, and
1120          * we do it within a critical section.
1121          *
1122          */
1123         case CAMGETPASSTHRU: {
1124                 union ccb *ccb;
1125                 struct cam_periph *periph;
1126                 struct periph_driver **p_drv;
1127                 char   *name;
1128                 int unit;
1129                 int cur_generation;
1130                 int base_periph_found;
1131                 int splbreaknum;
1132
1133                 ccb = (union ccb *)ap->a_data;
1134                 unit = ccb->cgdl.unit_number;
1135                 name = ccb->cgdl.periph_name;
1136                 /*
1137                  * Every 100 devices, we want to call splz() to check for
1138                  * and allow the software interrupt handler a chance to run.
1139                  *
1140                  * Most systems won't run into this check, but this should
1141                  * avoid starvation in the software interrupt handler in
1142                  * large systems.
1143                  */
1144                 splbreaknum = 100;
1145
1146                 ccb = (union ccb *)ap->a_data;
1147
1148                 base_periph_found = 0;
1149
1150                 /*
1151                  * Sanity check -- make sure we don't get a null peripheral
1152                  * driver name.
1153                  */
1154                 if (*ccb->cgdl.periph_name == '\0') {
1155                         error = EINVAL;
1156                         break;
1157                 }
1158
1159                 /* Keep the list from changing while we traverse it */
1160                 crit_enter();
1161 ptstartover:
1162                 cur_generation = xsoftc.generation;
1163
1164                 /* first find our driver in the list of drivers */
1165                 SET_FOREACH(p_drv, periphdriver_set) {
1166                         if (strcmp((*p_drv)->driver_name, name) == 0)
1167                                 break;
1168                 }
1169
1170                 if (*p_drv == NULL) {
1171                         crit_exit();
1172                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1173                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1174                         *ccb->cgdl.periph_name = '\0';
1175                         ccb->cgdl.unit_number = 0;
1176                         error = ENOENT;
1177                         break;
1178                 }
1179
1180                 /*
1181                  * Run through every peripheral instance of this driver
1182                  * and check to see whether it matches the unit passed
1183                  * in by the user.  If it does, get out of the loops and
1184                  * find the passthrough driver associated with that
1185                  * peripheral driver.
1186                  */
1187                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
1188                      periph = TAILQ_NEXT(periph, unit_links)) {
1189
1190                         if (periph->unit_number == unit) {
1191                                 break;
1192                         } else if (--splbreaknum == 0) {
1193                                 splz();
1194                                 splbreaknum = 100;
1195                                 if (cur_generation != xsoftc.generation)
1196                                        goto ptstartover;
1197                         }
1198                 }
1199                 /*
1200                  * If we found the peripheral driver that the user passed
1201                  * in, go through all of the peripheral drivers for that
1202                  * particular device and look for a passthrough driver.
1203                  */
1204                 if (periph != NULL) {
1205                         struct cam_ed *device;
1206                         int i;
1207
1208                         base_periph_found = 1;
1209                         device = periph->path->device;
1210                         for (i = 0, periph = device->periphs.slh_first;
1211                              periph != NULL;
1212                              periph = periph->periph_links.sle_next, i++) {
1213                                 /*
1214                                  * Check to see whether we have a
1215                                  * passthrough device or not.
1216                                  */
1217                                 if (strcmp(periph->periph_name, "pass") == 0) {
1218                                         /*
1219                                          * Fill in the getdevlist fields.
1220                                          */
1221                                         strcpy(ccb->cgdl.periph_name,
1222                                                periph->periph_name);
1223                                         ccb->cgdl.unit_number =
1224                                                 periph->unit_number;
1225                                         if (periph->periph_links.sle_next)
1226                                                 ccb->cgdl.status =
1227                                                         CAM_GDEVLIST_MORE_DEVS;
1228                                         else
1229                                                 ccb->cgdl.status =
1230                                                        CAM_GDEVLIST_LAST_DEVICE;
1231                                         ccb->cgdl.generation =
1232                                                 device->generation;
1233                                         ccb->cgdl.index = i;
1234                                         /*
1235                                          * Fill in some CCB header fields
1236                                          * that the user may want.
1237                                          */
1238                                         ccb->ccb_h.path_id =
1239                                                 periph->path->bus->path_id;
1240                                         ccb->ccb_h.target_id =
1241                                                 periph->path->target->target_id;
1242                                         ccb->ccb_h.target_lun =
1243                                                 periph->path->device->lun_id;
1244                                         ccb->ccb_h.status = CAM_REQ_CMP;
1245                                         break;
1246                                 }
1247                         }
1248                 }
1249
1250                 /*
1251                  * If the periph is null here, one of two things has
1252                  * happened.  The first possibility is that we couldn't
1253                  * find the unit number of the particular peripheral driver
1254                  * that the user is asking about.  e.g. the user asks for
1255                  * the passthrough driver for "da11".  We find the list of
1256                  * "da" peripherals all right, but there is no unit 11.
1257                  * The other possibility is that we went through the list
1258                  * of peripheral drivers attached to the device structure,
1259                  * but didn't find one with the name "pass".  Either way,
1260                  * we return ENOENT, since we couldn't find something.
1261                  */
1262                 if (periph == NULL) {
1263                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1264                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1265                         *ccb->cgdl.periph_name = '\0';
1266                         ccb->cgdl.unit_number = 0;
1267                         error = ENOENT;
1268                         /*
1269                          * It is unfortunate that this is even necessary,
1270                          * but there are many, many clueless users out there.
1271                          * If this is true, the user is looking for the
1272                          * passthrough driver, but doesn't have one in his
1273                          * kernel.
1274                          */
1275                         if (base_periph_found == 1) {
1276                                 kprintf("xptioctl: pass driver is not in the "
1277                                        "kernel\n");
1278                                 kprintf("xptioctl: put \"device pass0\" in "
1279                                        "your kernel config file\n");
1280                         }
1281                 }
1282                 crit_exit();
1283                 break;
1284                 }
1285         default:
1286                 error = ENOTTY;
1287                 break;
1288         }
1289
1290         return(error);
1291 }
1292
1293 /* Functions accessed by the peripheral drivers */
1294 static void
1295 xpt_init(void *dummy)
1296 {
1297         struct cam_sim *xpt_sim;
1298         struct cam_path *path;
1299         struct cam_devq *devq;
1300         cam_status status;
1301
1302         TAILQ_INIT(&xpt_busses);
1303         TAILQ_INIT(&cam_bioq);
1304         TAILQ_INIT(&cam_netq);
1305         SLIST_INIT(&ccb_freeq);
1306         STAILQ_INIT(&highpowerq);
1307
1308         /*
1309          * The xpt layer is, itself, the equivelent of a SIM.
1310          * Allow 16 ccbs in the ccb pool for it.  This should
1311          * give decent parallelism when we probe busses and
1312          * perform other XPT functions.
1313          */
1314         devq = cam_simq_alloc(16);
1315         xpt_sim = cam_sim_alloc(xptaction,
1316                                 xptpoll,
1317                                 "xpt",
1318                                 /*softc*/NULL,
1319                                 /*unit*/0,
1320                                 /*max_dev_transactions*/0,
1321                                 /*max_tagged_dev_transactions*/0,
1322                                 devq);
1323         cam_simq_release(devq);
1324         xpt_max_ccbs = 16;
1325
1326         xpt_bus_register(xpt_sim, /*bus #*/0);
1327
1328         /*
1329          * Looking at the XPT from the SIM layer, the XPT is
1330          * the equivelent of a peripheral driver.  Allocate
1331          * a peripheral driver entry for us.
1332          */
1333         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
1334                                       CAM_TARGET_WILDCARD,
1335                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
1336                 kprintf("xpt_init: xpt_create_path failed with status %#x,"
1337                        " failing attach\n", status);
1338                 return;
1339         }
1340
1341         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
1342                          path, NULL, 0, NULL);
1343         xpt_free_path(path);
1344
1345         xpt_sim->softc = xpt_periph;
1346
1347         /*
1348          * Register a callback for when interrupts are enabled.
1349          */
1350         xpt_config_hook = kmalloc(sizeof(struct intr_config_hook),
1351                                   M_TEMP, M_INTWAIT | M_ZERO);
1352         xpt_config_hook->ich_func = xpt_config;
1353         xpt_config_hook->ich_desc = "xpt";
1354         if (config_intrhook_establish(xpt_config_hook) != 0) {
1355                 kfree (xpt_config_hook, M_TEMP);
1356                 kprintf("xpt_init: config_intrhook_establish failed "
1357                        "- failing attach\n");
1358         }
1359
1360         /* Install our software interrupt handlers */
1361         register_swi(SWI_CAMNET, swi_camnet, NULL, "swi_camnet", NULL);
1362         register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio", NULL);
1363 }
1364
1365 static cam_status
1366 xptregister(struct cam_periph *periph, void *arg)
1367 {
1368         if (periph == NULL) {
1369                 kprintf("xptregister: periph was NULL!!\n");
1370                 return(CAM_REQ_CMP_ERR);
1371         }
1372
1373         periph->softc = NULL;
1374
1375         xpt_periph = periph;
1376
1377         return(CAM_REQ_CMP);
1378 }
1379
1380 int32_t
1381 xpt_add_periph(struct cam_periph *periph)
1382 {
1383         struct cam_ed *device;
1384         int32_t  status;
1385         struct periph_list *periph_head;
1386
1387         device = periph->path->device;
1388
1389         periph_head = &device->periphs;
1390
1391         status = CAM_REQ_CMP;
1392
1393         if (device != NULL) {
1394                 /*
1395                  * Make room for this peripheral
1396                  * so it will fit in the queue
1397                  * when it's scheduled to run
1398                  */
1399                 crit_enter();
1400                 status = camq_resize(&device->drvq,
1401                                      device->drvq.array_size + 1);
1402
1403                 device->generation++;
1404
1405                 SLIST_INSERT_HEAD(periph_head, periph, periph_links);
1406                 crit_exit();
1407         }
1408
1409         xsoftc.generation++;
1410
1411         return (status);
1412 }
1413
1414 void
1415 xpt_remove_periph(struct cam_periph *periph)
1416 {
1417         struct cam_ed *device;
1418
1419         device = periph->path->device;
1420
1421         if (device != NULL) {
1422                 struct periph_list *periph_head;
1423
1424                 periph_head = &device->periphs;
1425
1426                 /* Release the slot for this peripheral */
1427                 crit_enter();
1428                 camq_resize(&device->drvq, device->drvq.array_size - 1);
1429
1430                 device->generation++;
1431
1432                 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links);
1433                 crit_exit();
1434         }
1435
1436         xsoftc.generation++;
1437
1438 }
1439
1440 void
1441 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1442 {
1443         u_int mb;
1444         struct cam_path *path;
1445         struct ccb_trans_settings cts;
1446
1447         path = periph->path;
1448         /*
1449          * To ensure that this is printed in one piece,
1450          * mask out CAM interrupts.
1451          */
1452         crit_enter();
1453         kprintf("%s%d at %s%d bus %d target %d lun %d\n",
1454                periph->periph_name, periph->unit_number,
1455                path->bus->sim->sim_name,
1456                path->bus->sim->unit_number,
1457                path->bus->sim->bus_id,
1458                path->target->target_id,
1459                path->device->lun_id);
1460         kprintf("%s%d: ", periph->periph_name, periph->unit_number);
1461         scsi_print_inquiry(&path->device->inq_data);
1462         if ((bootverbose)
1463          && (path->device->serial_num_len > 0)) {
1464                 /* Don't wrap the screen  - print only the first 60 chars */
1465                 kprintf("%s%d: Serial Number %.60s\n", periph->periph_name,
1466                        periph->unit_number, path->device->serial_num);
1467         }
1468         xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
1469         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1470         cts.flags = CCB_TRANS_CURRENT_SETTINGS;
1471         xpt_action((union ccb*)&cts);
1472         if (cts.ccb_h.status == CAM_REQ_CMP) {
1473                 u_int speed;
1474                 u_int freq;
1475
1476                 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1477                   && cts.sync_offset != 0) {
1478                         freq = scsi_calc_syncsrate(cts.sync_period);
1479                         speed = freq;
1480                 } else {
1481                         struct ccb_pathinq cpi;
1482
1483                         /* Ask the SIM for its base transfer speed */
1484                         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1485                         cpi.ccb_h.func_code = XPT_PATH_INQ;
1486                         xpt_action((union ccb *)&cpi);
1487
1488                         speed = cpi.base_transfer_speed;
1489                         freq = 0;
1490                 }
1491                 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0)
1492                         speed *= (0x01 << cts.bus_width);
1493                 mb = speed / 1000;
1494                 if (mb > 0)
1495                         kprintf("%s%d: %d.%03dMB/s transfers",
1496                                periph->periph_name, periph->unit_number,
1497                                mb, speed % 1000);
1498                 else
1499                         kprintf("%s%d: %dKB/s transfers", periph->periph_name,
1500                                periph->unit_number, speed);
1501                 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1502                  && cts.sync_offset != 0) {
1503                         kprintf(" (%d.%03dMHz, offset %d", freq / 1000,
1504                                freq % 1000, cts.sync_offset);
1505                 }
1506                 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0
1507                  && cts.bus_width > 0) {
1508                         if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1509                          && cts.sync_offset != 0) {
1510                                 kprintf(", ");
1511                         } else {
1512                                 kprintf(" (");
1513                         }
1514                         kprintf("%dbit)", 8 * (0x01 << cts.bus_width));
1515                 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1516                         && cts.sync_offset != 0) {
1517                         kprintf(")");
1518                 }
1519
1520                 if (path->device->inq_flags & SID_CmdQue
1521                  || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1522                         kprintf(", Tagged Queueing Enabled");
1523                 }
1524
1525                 kprintf("\n");
1526         } else if (path->device->inq_flags & SID_CmdQue
1527                 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1528                 kprintf("%s%d: Tagged Queueing Enabled\n",
1529                        periph->periph_name, periph->unit_number);
1530         }
1531
1532         /*
1533          * We only want to print the caller's announce string if they've
1534          * passed one in..
1535          */
1536         if (announce_string != NULL)
1537                 kprintf("%s%d: %s\n", periph->periph_name,
1538                        periph->unit_number, announce_string);
1539         crit_exit();
1540 }
1541
1542
1543 static dev_match_ret
1544 xptbusmatch(struct dev_match_pattern *patterns, int num_patterns,
1545             struct cam_eb *bus)
1546 {
1547         dev_match_ret retval;
1548         int i;
1549
1550         retval = DM_RET_NONE;
1551
1552         /*
1553          * If we aren't given something to match against, that's an error.
1554          */
1555         if (bus == NULL)
1556                 return(DM_RET_ERROR);
1557
1558         /*
1559          * If there are no match entries, then this bus matches no
1560          * matter what.
1561          */
1562         if ((patterns == NULL) || (num_patterns == 0))
1563                 return(DM_RET_DESCEND | DM_RET_COPY);
1564
1565         for (i = 0; i < num_patterns; i++) {
1566                 struct bus_match_pattern *cur_pattern;
1567
1568                 /*
1569                  * If the pattern in question isn't for a bus node, we
1570                  * aren't interested.  However, we do indicate to the
1571                  * calling routine that we should continue descending the
1572                  * tree, since the user wants to match against lower-level
1573                  * EDT elements.
1574                  */
1575                 if (patterns[i].type != DEV_MATCH_BUS) {
1576                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1577                                 retval |= DM_RET_DESCEND;
1578                         continue;
1579                 }
1580
1581                 cur_pattern = &patterns[i].pattern.bus_pattern;
1582
1583                 /*
1584                  * If they want to match any bus node, we give them any
1585                  * device node.
1586                  */
1587                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1588                         /* set the copy flag */
1589                         retval |= DM_RET_COPY;
1590
1591                         /*
1592                          * If we've already decided on an action, go ahead
1593                          * and return.
1594                          */
1595                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1596                                 return(retval);
1597                 }
1598
1599                 /*
1600                  * Not sure why someone would do this...
1601                  */
1602                 if (cur_pattern->flags == BUS_MATCH_NONE)
1603                         continue;
1604
1605                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1606                  && (cur_pattern->path_id != bus->path_id))
1607                         continue;
1608
1609                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1610                  && (cur_pattern->bus_id != bus->sim->bus_id))
1611                         continue;
1612
1613                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1614                  && (cur_pattern->unit_number != bus->sim->unit_number))
1615                         continue;
1616
1617                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1618                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1619                              DEV_IDLEN) != 0))
1620                         continue;
1621
1622                 /*
1623                  * If we get to this point, the user definitely wants
1624                  * information on this bus.  So tell the caller to copy the
1625                  * data out.
1626                  */
1627                 retval |= DM_RET_COPY;
1628
1629                 /*
1630                  * If the return action has been set to descend, then we
1631                  * know that we've already seen a non-bus matching
1632                  * expression, therefore we need to further descend the tree.
1633                  * This won't change by continuing around the loop, so we
1634                  * go ahead and return.  If we haven't seen a non-bus
1635                  * matching expression, we keep going around the loop until
1636                  * we exhaust the matching expressions.  We'll set the stop
1637                  * flag once we fall out of the loop.
1638                  */
1639                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1640                         return(retval);
1641         }
1642
1643         /*
1644          * If the return action hasn't been set to descend yet, that means
1645          * we haven't seen anything other than bus matching patterns.  So
1646          * tell the caller to stop descending the tree -- the user doesn't
1647          * want to match against lower level tree elements.
1648          */
1649         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1650                 retval |= DM_RET_STOP;
1651
1652         return(retval);
1653 }
1654
1655 static dev_match_ret
1656 xptdevicematch(struct dev_match_pattern *patterns, int num_patterns,
1657                struct cam_ed *device)
1658 {
1659         dev_match_ret retval;
1660         int i;
1661
1662         retval = DM_RET_NONE;
1663
1664         /*
1665          * If we aren't given something to match against, that's an error.
1666          */
1667         if (device == NULL)
1668                 return(DM_RET_ERROR);
1669
1670         /*
1671          * If there are no match entries, then this device matches no
1672          * matter what.
1673          */
1674         if ((patterns == NULL) || (patterns == 0))
1675                 return(DM_RET_DESCEND | DM_RET_COPY);
1676
1677         for (i = 0; i < num_patterns; i++) {
1678                 struct device_match_pattern *cur_pattern;
1679
1680                 /*
1681                  * If the pattern in question isn't for a device node, we
1682                  * aren't interested.
1683                  */
1684                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1685                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1686                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1687                                 retval |= DM_RET_DESCEND;
1688                         continue;
1689                 }
1690
1691                 cur_pattern = &patterns[i].pattern.device_pattern;
1692
1693                 /*
1694                  * If they want to match any device node, we give them any
1695                  * device node.
1696                  */
1697                 if (cur_pattern->flags == DEV_MATCH_ANY) {
1698                         /* set the copy flag */
1699                         retval |= DM_RET_COPY;
1700
1701
1702                         /*
1703                          * If we've already decided on an action, go ahead
1704                          * and return.
1705                          */
1706                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1707                                 return(retval);
1708                 }
1709
1710                 /*
1711                  * Not sure why someone would do this...
1712                  */
1713                 if (cur_pattern->flags == DEV_MATCH_NONE)
1714                         continue;
1715
1716                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1717                  && (cur_pattern->path_id != device->target->bus->path_id))
1718                         continue;
1719
1720                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1721                  && (cur_pattern->target_id != device->target->target_id))
1722                         continue;
1723
1724                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1725                  && (cur_pattern->target_lun != device->lun_id))
1726                         continue;
1727
1728                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1729                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1730                                     (caddr_t)&cur_pattern->inq_pat,
1731                                     1, sizeof(cur_pattern->inq_pat),
1732                                     scsi_static_inquiry_match) == NULL))
1733                         continue;
1734
1735                 /*
1736                  * If we get to this point, the user definitely wants
1737                  * information on this device.  So tell the caller to copy
1738                  * the data out.
1739                  */
1740                 retval |= DM_RET_COPY;
1741
1742                 /*
1743                  * If the return action has been set to descend, then we
1744                  * know that we've already seen a peripheral matching
1745                  * expression, therefore we need to further descend the tree.
1746                  * This won't change by continuing around the loop, so we
1747                  * go ahead and return.  If we haven't seen a peripheral
1748                  * matching expression, we keep going around the loop until
1749                  * we exhaust the matching expressions.  We'll set the stop
1750                  * flag once we fall out of the loop.
1751                  */
1752                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1753                         return(retval);
1754         }
1755
1756         /*
1757          * If the return action hasn't been set to descend yet, that means
1758          * we haven't seen any peripheral matching patterns.  So tell the
1759          * caller to stop descending the tree -- the user doesn't want to
1760          * match against lower level tree elements.
1761          */
1762         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1763                 retval |= DM_RET_STOP;
1764
1765         return(retval);
1766 }
1767
1768 /*
1769  * Match a single peripheral against any number of match patterns.
1770  */
1771 static dev_match_ret
1772 xptperiphmatch(struct dev_match_pattern *patterns, int num_patterns,
1773                struct cam_periph *periph)
1774 {
1775         dev_match_ret retval;
1776         int i;
1777
1778         /*
1779          * If we aren't given something to match against, that's an error.
1780          */
1781         if (periph == NULL)
1782                 return(DM_RET_ERROR);
1783
1784         /*
1785          * If there are no match entries, then this peripheral matches no
1786          * matter what.
1787          */
1788         if ((patterns == NULL) || (num_patterns == 0))
1789                 return(DM_RET_STOP | DM_RET_COPY);
1790
1791         /*
1792          * There aren't any nodes below a peripheral node, so there's no
1793          * reason to descend the tree any further.
1794          */
1795         retval = DM_RET_STOP;
1796
1797         for (i = 0; i < num_patterns; i++) {
1798                 struct periph_match_pattern *cur_pattern;
1799
1800                 /*
1801                  * If the pattern in question isn't for a peripheral, we
1802                  * aren't interested.
1803                  */
1804                 if (patterns[i].type != DEV_MATCH_PERIPH)
1805                         continue;
1806
1807                 cur_pattern = &patterns[i].pattern.periph_pattern;
1808
1809                 /*
1810                  * If they want to match on anything, then we will do so.
1811                  */
1812                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1813                         /* set the copy flag */
1814                         retval |= DM_RET_COPY;
1815
1816                         /*
1817                          * We've already set the return action to stop,
1818                          * since there are no nodes below peripherals in
1819                          * the tree.
1820                          */
1821                         return(retval);
1822                 }
1823
1824                 /*
1825                  * Not sure why someone would do this...
1826                  */
1827                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1828                         continue;
1829
1830                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1831                  && (cur_pattern->path_id != periph->path->bus->path_id))
1832                         continue;
1833
1834                 /*
1835                  * For the target and lun id's, we have to make sure the
1836                  * target and lun pointers aren't NULL.  The xpt peripheral
1837                  * has a wildcard target and device.
1838                  */
1839                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1840                  && ((periph->path->target == NULL)
1841                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1842                         continue;
1843
1844                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1845                  && ((periph->path->device == NULL)
1846                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1847                         continue;
1848
1849                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1850                  && (cur_pattern->unit_number != periph->unit_number))
1851                         continue;
1852
1853                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1854                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1855                              DEV_IDLEN) != 0))
1856                         continue;
1857
1858                 /*
1859                  * If we get to this point, the user definitely wants
1860                  * information on this peripheral.  So tell the caller to
1861                  * copy the data out.
1862                  */
1863                 retval |= DM_RET_COPY;
1864
1865                 /*
1866                  * The return action has already been set to stop, since
1867                  * peripherals don't have any nodes below them in the EDT.
1868                  */
1869                 return(retval);
1870         }
1871
1872         /*
1873          * If we get to this point, the peripheral that was passed in
1874          * doesn't match any of the patterns.
1875          */
1876         return(retval);
1877 }
1878
1879 static int
1880 xptedtbusfunc(struct cam_eb *bus, void *arg)
1881 {
1882         struct ccb_dev_match *cdm;
1883         dev_match_ret retval;
1884
1885         cdm = (struct ccb_dev_match *)arg;
1886
1887         /*
1888          * If our position is for something deeper in the tree, that means
1889          * that we've already seen this node.  So, we keep going down.
1890          */
1891         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1892          && (cdm->pos.cookie.bus == bus)
1893          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1894          && (cdm->pos.cookie.target != NULL))
1895                 retval = DM_RET_DESCEND;
1896         else
1897                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1898
1899         /*
1900          * If we got an error, bail out of the search.
1901          */
1902         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1903                 cdm->status = CAM_DEV_MATCH_ERROR;
1904                 return(0);
1905         }
1906
1907         /*
1908          * If the copy flag is set, copy this bus out.
1909          */
1910         if (retval & DM_RET_COPY) {
1911                 int spaceleft, j;
1912
1913                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1914                         sizeof(struct dev_match_result));
1915
1916                 /*
1917                  * If we don't have enough space to put in another
1918                  * match result, save our position and tell the
1919                  * user there are more devices to check.
1920                  */
1921                 if (spaceleft < sizeof(struct dev_match_result)) {
1922                         bzero(&cdm->pos, sizeof(cdm->pos));
1923                         cdm->pos.position_type =
1924                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1925
1926                         cdm->pos.cookie.bus = bus;
1927                         cdm->pos.generations[CAM_BUS_GENERATION]=
1928                                 bus_generation;
1929                         cdm->status = CAM_DEV_MATCH_MORE;
1930                         return(0);
1931                 }
1932                 j = cdm->num_matches;
1933                 cdm->num_matches++;
1934                 cdm->matches[j].type = DEV_MATCH_BUS;
1935                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1936                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1937                 cdm->matches[j].result.bus_result.unit_number =
1938                         bus->sim->unit_number;
1939                 strncpy(cdm->matches[j].result.bus_result.dev_name,
1940                         bus->sim->sim_name, DEV_IDLEN);
1941         }
1942
1943         /*
1944          * If the user is only interested in busses, there's no
1945          * reason to descend to the next level in the tree.
1946          */
1947         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1948                 return(1);
1949
1950         /*
1951          * If there is a target generation recorded, check it to
1952          * make sure the target list hasn't changed.
1953          */
1954         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1955          && (bus == cdm->pos.cookie.bus)
1956          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1957          && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0)
1958          && (cdm->pos.generations[CAM_TARGET_GENERATION] !=
1959              bus->generation)) {
1960                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1961                 return(0);
1962         }
1963
1964         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1965          && (cdm->pos.cookie.bus == bus)
1966          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1967          && (cdm->pos.cookie.target != NULL))
1968                 return(xpttargettraverse(bus,
1969                                         (struct cam_et *)cdm->pos.cookie.target,
1970                                          xptedttargetfunc, arg));
1971         else
1972                 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg));
1973 }
1974
1975 static int
1976 xptedttargetfunc(struct cam_et *target, void *arg)
1977 {
1978         struct ccb_dev_match *cdm;
1979
1980         cdm = (struct ccb_dev_match *)arg;
1981
1982         /*
1983          * If there is a device list generation recorded, check it to
1984          * make sure the device list hasn't changed.
1985          */
1986         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1987          && (cdm->pos.cookie.bus == target->bus)
1988          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1989          && (cdm->pos.cookie.target == target)
1990          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1991          && (cdm->pos.generations[CAM_DEV_GENERATION] != 0)
1992          && (cdm->pos.generations[CAM_DEV_GENERATION] !=
1993              target->generation)) {
1994                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1995                 return(0);
1996         }
1997
1998         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1999          && (cdm->pos.cookie.bus == target->bus)
2000          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2001          && (cdm->pos.cookie.target == target)
2002          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2003          && (cdm->pos.cookie.device != NULL))
2004                 return(xptdevicetraverse(target,
2005                                         (struct cam_ed *)cdm->pos.cookie.device,
2006                                          xptedtdevicefunc, arg));
2007         else
2008                 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg));
2009 }
2010
2011 static int
2012 xptedtdevicefunc(struct cam_ed *device, void *arg)
2013 {
2014
2015         struct ccb_dev_match *cdm;
2016         dev_match_ret retval;
2017
2018         cdm = (struct ccb_dev_match *)arg;
2019
2020         /*
2021          * If our position is for something deeper in the tree, that means
2022          * that we've already seen this node.  So, we keep going down.
2023          */
2024         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2025          && (cdm->pos.cookie.device == device)
2026          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2027          && (cdm->pos.cookie.periph != NULL))
2028                 retval = DM_RET_DESCEND;
2029         else
2030                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
2031                                         device);
2032
2033         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2034                 cdm->status = CAM_DEV_MATCH_ERROR;
2035                 return(0);
2036         }
2037
2038         /*
2039          * If the copy flag is set, copy this device out.
2040          */
2041         if (retval & DM_RET_COPY) {
2042                 int spaceleft, j;
2043
2044                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2045                         sizeof(struct dev_match_result));
2046
2047                 /*
2048                  * If we don't have enough space to put in another
2049                  * match result, save our position and tell the
2050                  * user there are more devices to check.
2051                  */
2052                 if (spaceleft < sizeof(struct dev_match_result)) {
2053                         bzero(&cdm->pos, sizeof(cdm->pos));
2054                         cdm->pos.position_type =
2055                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2056                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
2057
2058                         cdm->pos.cookie.bus = device->target->bus;
2059                         cdm->pos.generations[CAM_BUS_GENERATION]=
2060                                 bus_generation;
2061                         cdm->pos.cookie.target = device->target;
2062                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2063                                 device->target->bus->generation;
2064                         cdm->pos.cookie.device = device;
2065                         cdm->pos.generations[CAM_DEV_GENERATION] =
2066                                 device->target->generation;
2067                         cdm->status = CAM_DEV_MATCH_MORE;
2068                         return(0);
2069                 }
2070                 j = cdm->num_matches;
2071                 cdm->num_matches++;
2072                 cdm->matches[j].type = DEV_MATCH_DEVICE;
2073                 cdm->matches[j].result.device_result.path_id =
2074                         device->target->bus->path_id;
2075                 cdm->matches[j].result.device_result.target_id =
2076                         device->target->target_id;
2077                 cdm->matches[j].result.device_result.target_lun =
2078                         device->lun_id;
2079                 bcopy(&device->inq_data,
2080                       &cdm->matches[j].result.device_result.inq_data,
2081                       sizeof(struct scsi_inquiry_data));
2082
2083                 /* Let the user know whether this device is unconfigured */
2084                 if (device->flags & CAM_DEV_UNCONFIGURED)
2085                         cdm->matches[j].result.device_result.flags =
2086                                 DEV_RESULT_UNCONFIGURED;
2087                 else
2088                         cdm->matches[j].result.device_result.flags =
2089                                 DEV_RESULT_NOFLAG;
2090         }
2091
2092         /*
2093          * If the user isn't interested in peripherals, don't descend
2094          * the tree any further.
2095          */
2096         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2097                 return(1);
2098
2099         /*
2100          * If there is a peripheral list generation recorded, make sure
2101          * it hasn't changed.
2102          */
2103         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2104          && (device->target->bus == cdm->pos.cookie.bus)
2105          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2106          && (device->target == cdm->pos.cookie.target)
2107          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2108          && (device == cdm->pos.cookie.device)
2109          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2110          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2111          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2112              device->generation)){
2113                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2114                 return(0);
2115         }
2116
2117         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2118          && (cdm->pos.cookie.bus == device->target->bus)
2119          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2120          && (cdm->pos.cookie.target == device->target)
2121          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2122          && (cdm->pos.cookie.device == device)
2123          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2124          && (cdm->pos.cookie.periph != NULL))
2125                 return(xptperiphtraverse(device,
2126                                 (struct cam_periph *)cdm->pos.cookie.periph,
2127                                 xptedtperiphfunc, arg));
2128         else
2129                 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg));
2130 }
2131
2132 static int
2133 xptedtperiphfunc(struct cam_periph *periph, void *arg)
2134 {
2135         struct ccb_dev_match *cdm;
2136         dev_match_ret retval;
2137
2138         cdm = (struct ccb_dev_match *)arg;
2139
2140         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2141
2142         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2143                 cdm->status = CAM_DEV_MATCH_ERROR;
2144                 return(0);
2145         }
2146
2147         /*
2148          * If the copy flag is set, copy this peripheral out.
2149          */
2150         if (retval & DM_RET_COPY) {
2151                 int spaceleft, j;
2152
2153                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2154                         sizeof(struct dev_match_result));
2155
2156                 /*
2157                  * If we don't have enough space to put in another
2158                  * match result, save our position and tell the
2159                  * user there are more devices to check.
2160                  */
2161                 if (spaceleft < sizeof(struct dev_match_result)) {
2162                         bzero(&cdm->pos, sizeof(cdm->pos));
2163                         cdm->pos.position_type =
2164                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2165                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
2166                                 CAM_DEV_POS_PERIPH;
2167
2168                         cdm->pos.cookie.bus = periph->path->bus;
2169                         cdm->pos.generations[CAM_BUS_GENERATION]=
2170                                 bus_generation;
2171                         cdm->pos.cookie.target = periph->path->target;
2172                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2173                                 periph->path->bus->generation;
2174                         cdm->pos.cookie.device = periph->path->device;
2175                         cdm->pos.generations[CAM_DEV_GENERATION] =
2176                                 periph->path->target->generation;
2177                         cdm->pos.cookie.periph = periph;
2178                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2179                                 periph->path->device->generation;
2180                         cdm->status = CAM_DEV_MATCH_MORE;
2181                         return(0);
2182                 }
2183
2184                 j = cdm->num_matches;
2185                 cdm->num_matches++;
2186                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2187                 cdm->matches[j].result.periph_result.path_id =
2188                         periph->path->bus->path_id;
2189                 cdm->matches[j].result.periph_result.target_id =
2190                         periph->path->target->target_id;
2191                 cdm->matches[j].result.periph_result.target_lun =
2192                         periph->path->device->lun_id;
2193                 cdm->matches[j].result.periph_result.unit_number =
2194                         periph->unit_number;
2195                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2196                         periph->periph_name, DEV_IDLEN);
2197         }
2198
2199         return(1);
2200 }
2201
2202 static int
2203 xptedtmatch(struct ccb_dev_match *cdm)
2204 {
2205         int ret;
2206
2207         cdm->num_matches = 0;
2208
2209         /*
2210          * Check the bus list generation.  If it has changed, the user
2211          * needs to reset everything and start over.
2212          */
2213         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2214          && (cdm->pos.generations[CAM_BUS_GENERATION] != 0)
2215          && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) {
2216                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2217                 return(0);
2218         }
2219
2220         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2221          && (cdm->pos.cookie.bus != NULL))
2222                 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus,
2223                                      xptedtbusfunc, cdm);
2224         else
2225                 ret = xptbustraverse(NULL, xptedtbusfunc, cdm);
2226
2227         /*
2228          * If we get back 0, that means that we had to stop before fully
2229          * traversing the EDT.  It also means that one of the subroutines
2230          * has set the status field to the proper value.  If we get back 1,
2231          * we've fully traversed the EDT and copied out any matching entries.
2232          */
2233         if (ret == 1)
2234                 cdm->status = CAM_DEV_MATCH_LAST;
2235
2236         return(ret);
2237 }
2238
2239 static int
2240 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2241 {
2242         struct ccb_dev_match *cdm;
2243
2244         cdm = (struct ccb_dev_match *)arg;
2245
2246         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2247          && (cdm->pos.cookie.pdrv == pdrv)
2248          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2249          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2250          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2251              (*pdrv)->generation)) {
2252                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2253                 return(0);
2254         }
2255
2256         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2257          && (cdm->pos.cookie.pdrv == pdrv)
2258          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2259          && (cdm->pos.cookie.periph != NULL))
2260                 return(xptpdperiphtraverse(pdrv,
2261                                 (struct cam_periph *)cdm->pos.cookie.periph,
2262                                 xptplistperiphfunc, arg));
2263         else
2264                 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg));
2265 }
2266
2267 static int
2268 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2269 {
2270         struct ccb_dev_match *cdm;
2271         dev_match_ret retval;
2272
2273         cdm = (struct ccb_dev_match *)arg;
2274
2275         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2276
2277         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2278                 cdm->status = CAM_DEV_MATCH_ERROR;
2279                 return(0);
2280         }
2281
2282         /*
2283          * If the copy flag is set, copy this peripheral out.
2284          */
2285         if (retval & DM_RET_COPY) {
2286                 int spaceleft, j;
2287
2288                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2289                         sizeof(struct dev_match_result));
2290
2291                 /*
2292                  * If we don't have enough space to put in another
2293                  * match result, save our position and tell the
2294                  * user there are more devices to check.
2295                  */
2296                 if (spaceleft < sizeof(struct dev_match_result)) {
2297                         struct periph_driver **pdrv;
2298
2299                         pdrv = NULL;
2300                         bzero(&cdm->pos, sizeof(cdm->pos));
2301                         cdm->pos.position_type =
2302                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2303                                 CAM_DEV_POS_PERIPH;
2304
2305                         /*
2306                          * This may look a bit non-sensical, but it is
2307                          * actually quite logical.  There are very few
2308                          * peripheral drivers, and bloating every peripheral
2309                          * structure with a pointer back to its parent
2310                          * peripheral driver linker set entry would cost
2311                          * more in the long run than doing this quick lookup.
2312                          */
2313                         SET_FOREACH(pdrv, periphdriver_set) {
2314                                 if (strcmp((*pdrv)->driver_name,
2315                                     periph->periph_name) == 0)
2316                                         break;
2317                         }
2318
2319                         if (*pdrv == NULL) {
2320                                 cdm->status = CAM_DEV_MATCH_ERROR;
2321                                 return(0);
2322                         }
2323
2324                         cdm->pos.cookie.pdrv = pdrv;
2325                         /*
2326                          * The periph generation slot does double duty, as
2327                          * does the periph pointer slot.  They are used for
2328                          * both edt and pdrv lookups and positioning.
2329                          */
2330                         cdm->pos.cookie.periph = periph;
2331                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2332                                 (*pdrv)->generation;
2333                         cdm->status = CAM_DEV_MATCH_MORE;
2334                         return(0);
2335                 }
2336
2337                 j = cdm->num_matches;
2338                 cdm->num_matches++;
2339                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2340                 cdm->matches[j].result.periph_result.path_id =
2341                         periph->path->bus->path_id;
2342
2343                 /*
2344                  * The transport layer peripheral doesn't have a target or
2345                  * lun.
2346                  */
2347                 if (periph->path->target)
2348                         cdm->matches[j].result.periph_result.target_id =
2349                                 periph->path->target->target_id;
2350                 else
2351                         cdm->matches[j].result.periph_result.target_id = -1;
2352
2353                 if (periph->path->device)
2354                         cdm->matches[j].result.periph_result.target_lun =
2355                                 periph->path->device->lun_id;
2356                 else
2357                         cdm->matches[j].result.periph_result.target_lun = -1;
2358
2359                 cdm->matches[j].result.periph_result.unit_number =
2360                         periph->unit_number;
2361                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2362                         periph->periph_name, DEV_IDLEN);
2363         }
2364
2365         return(1);
2366 }
2367
2368 static int
2369 xptperiphlistmatch(struct ccb_dev_match *cdm)
2370 {
2371         int ret;
2372
2373         cdm->num_matches = 0;
2374
2375         /*
2376          * At this point in the edt traversal function, we check the bus
2377          * list generation to make sure that no busses have been added or
2378          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2379          * For the peripheral driver list traversal function, however, we
2380          * don't have to worry about new peripheral driver types coming or
2381          * going; they're in a linker set, and therefore can't change
2382          * without a recompile.
2383          */
2384
2385         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2386          && (cdm->pos.cookie.pdrv != NULL))
2387                 ret = xptpdrvtraverse(
2388                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2389                                 xptplistpdrvfunc, cdm);
2390         else
2391                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2392
2393         /*
2394          * If we get back 0, that means that we had to stop before fully
2395          * traversing the peripheral driver tree.  It also means that one of
2396          * the subroutines has set the status field to the proper value.  If
2397          * we get back 1, we've fully traversed the EDT and copied out any
2398          * matching entries.
2399          */
2400         if (ret == 1)
2401                 cdm->status = CAM_DEV_MATCH_LAST;
2402
2403         return(ret);
2404 }
2405
2406 static int
2407 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2408 {
2409         struct cam_eb *bus, *next_bus;
2410         int retval;
2411
2412         retval = 1;
2413
2414         for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses));
2415              bus != NULL;
2416              bus = next_bus) {
2417                 next_bus = TAILQ_NEXT(bus, links);
2418
2419                 retval = tr_func(bus, arg);
2420                 if (retval == 0)
2421                         return(retval);
2422         }
2423
2424         return(retval);
2425 }
2426
2427 static int
2428 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2429                   xpt_targetfunc_t *tr_func, void *arg)
2430 {
2431         struct cam_et *target, *next_target;
2432         int retval;
2433
2434         retval = 1;
2435         for (target = (start_target ? start_target :
2436                        TAILQ_FIRST(&bus->et_entries));
2437              target != NULL; target = next_target) {
2438
2439                 next_target = TAILQ_NEXT(target, links);
2440
2441                 retval = tr_func(target, arg);
2442
2443                 if (retval == 0)
2444                         return(retval);
2445         }
2446
2447         return(retval);
2448 }
2449
2450 static int
2451 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2452                   xpt_devicefunc_t *tr_func, void *arg)
2453 {
2454         struct cam_ed *device, *next_device;
2455         int retval;
2456
2457         retval = 1;
2458         for (device = (start_device ? start_device :
2459                        TAILQ_FIRST(&target->ed_entries));
2460              device != NULL;
2461              device = next_device) {
2462
2463                 next_device = TAILQ_NEXT(device, links);
2464
2465                 retval = tr_func(device, arg);
2466
2467                 if (retval == 0)
2468                         return(retval);
2469         }
2470
2471         return(retval);
2472 }
2473
2474 static int
2475 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2476                   xpt_periphfunc_t *tr_func, void *arg)
2477 {
2478         struct cam_periph *periph, *next_periph;
2479         int retval;
2480
2481         retval = 1;
2482
2483         for (periph = (start_periph ? start_periph :
2484                        SLIST_FIRST(&device->periphs));
2485              periph != NULL;
2486              periph = next_periph) {
2487
2488                 next_periph = SLIST_NEXT(periph, periph_links);
2489
2490                 retval = tr_func(periph, arg);
2491                 if (retval == 0)
2492                         return(retval);
2493         }
2494
2495         return(retval);
2496 }
2497
2498 static int
2499 xptpdrvtraverse(struct periph_driver **start_pdrv,
2500                 xpt_pdrvfunc_t *tr_func, void *arg)
2501 {
2502         struct periph_driver **pdrv;
2503         int retval;
2504
2505         retval = 1;
2506
2507         /*
2508          * We don't traverse the peripheral driver list like we do the
2509          * other lists, because it is a linker set, and therefore cannot be
2510          * changed during runtime.  If the peripheral driver list is ever
2511          * re-done to be something other than a linker set (i.e. it can
2512          * change while the system is running), the list traversal should
2513          * be modified to work like the other traversal functions.
2514          */
2515         SET_FOREACH(pdrv, periphdriver_set) {
2516                 if (start_pdrv == NULL || start_pdrv == pdrv) {
2517                         retval = tr_func(pdrv, arg);
2518                         if (retval == 0)
2519                                 return(retval);
2520                         start_pdrv = NULL; /* traverse remainder */
2521                 }
2522         }
2523         return(retval);
2524 }
2525
2526 static int
2527 xptpdperiphtraverse(struct periph_driver **pdrv,
2528                     struct cam_periph *start_periph,
2529                     xpt_periphfunc_t *tr_func, void *arg)
2530 {
2531         struct cam_periph *periph, *next_periph;
2532         int retval;
2533
2534         retval = 1;
2535
2536         for (periph = (start_periph ? start_periph :
2537              TAILQ_FIRST(&(*pdrv)->units)); periph != NULL;
2538              periph = next_periph) {
2539
2540                 next_periph = TAILQ_NEXT(periph, unit_links);
2541
2542                 retval = tr_func(periph, arg);
2543                 if (retval == 0)
2544                         return(retval);
2545         }
2546         return(retval);
2547 }
2548
2549 static int
2550 xptdefbusfunc(struct cam_eb *bus, void *arg)
2551 {
2552         struct xpt_traverse_config *tr_config;
2553
2554         tr_config = (struct xpt_traverse_config *)arg;
2555
2556         if (tr_config->depth == XPT_DEPTH_BUS) {
2557                 xpt_busfunc_t *tr_func;
2558
2559                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2560
2561                 return(tr_func(bus, tr_config->tr_arg));
2562         } else
2563                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2564 }
2565
2566 static int
2567 xptdeftargetfunc(struct cam_et *target, void *arg)
2568 {
2569         struct xpt_traverse_config *tr_config;
2570
2571         tr_config = (struct xpt_traverse_config *)arg;
2572
2573         if (tr_config->depth == XPT_DEPTH_TARGET) {
2574                 xpt_targetfunc_t *tr_func;
2575
2576                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2577
2578                 return(tr_func(target, tr_config->tr_arg));
2579         } else
2580                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2581 }
2582
2583 static int
2584 xptdefdevicefunc(struct cam_ed *device, void *arg)
2585 {
2586         struct xpt_traverse_config *tr_config;
2587
2588         tr_config = (struct xpt_traverse_config *)arg;
2589
2590         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2591                 xpt_devicefunc_t *tr_func;
2592
2593                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2594
2595                 return(tr_func(device, tr_config->tr_arg));
2596         } else
2597                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2598 }
2599
2600 static int
2601 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2602 {
2603         struct xpt_traverse_config *tr_config;
2604         xpt_periphfunc_t *tr_func;
2605
2606         tr_config = (struct xpt_traverse_config *)arg;
2607
2608         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2609
2610         /*
2611          * Unlike the other default functions, we don't check for depth
2612          * here.  The peripheral driver level is the last level in the EDT,
2613          * so if we're here, we should execute the function in question.
2614          */
2615         return(tr_func(periph, tr_config->tr_arg));
2616 }
2617
2618 /*
2619  * Execute the given function for every bus in the EDT.
2620  */
2621 static int
2622 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2623 {
2624         struct xpt_traverse_config tr_config;
2625
2626         tr_config.depth = XPT_DEPTH_BUS;
2627         tr_config.tr_func = tr_func;
2628         tr_config.tr_arg = arg;
2629
2630         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2631 }
2632
2633 #ifdef notusedyet
2634 /*
2635  * Execute the given function for every target in the EDT.
2636  */
2637 static int
2638 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg)
2639 {
2640         struct xpt_traverse_config tr_config;
2641
2642         tr_config.depth = XPT_DEPTH_TARGET;
2643         tr_config.tr_func = tr_func;
2644         tr_config.tr_arg = arg;
2645
2646         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2647 }
2648 #endif /* notusedyet */
2649
2650 /*
2651  * Execute the given function for every device in the EDT.
2652  */
2653 static int
2654 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2655 {
2656         struct xpt_traverse_config tr_config;
2657
2658         tr_config.depth = XPT_DEPTH_DEVICE;
2659         tr_config.tr_func = tr_func;
2660         tr_config.tr_arg = arg;
2661
2662         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2663 }
2664
2665 #ifdef notusedyet
2666 /*
2667  * Execute the given function for every peripheral in the EDT.
2668  */
2669 static int
2670 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg)
2671 {
2672         struct xpt_traverse_config tr_config;
2673
2674         tr_config.depth = XPT_DEPTH_PERIPH;
2675         tr_config.tr_func = tr_func;
2676         tr_config.tr_arg = arg;
2677
2678         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2679 }
2680 #endif /* notusedyet */
2681
2682 static int
2683 xptsetasyncfunc(struct cam_ed *device, void *arg)
2684 {
2685         struct cam_path path;
2686         struct ccb_getdev cgd;
2687         struct async_node *cur_entry;
2688
2689         cur_entry = (struct async_node *)arg;
2690
2691         /*
2692          * Don't report unconfigured devices (Wildcard devs,
2693          * devices only for target mode, device instances
2694          * that have been invalidated but are waiting for
2695          * their last reference count to be released).
2696          */
2697         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2698                 return (1);
2699
2700         xpt_compile_path(&path,
2701                          NULL,
2702                          device->target->bus->path_id,
2703                          device->target->target_id,
2704                          device->lun_id);
2705         xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1);
2706         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2707         xpt_action((union ccb *)&cgd);
2708         cur_entry->callback(cur_entry->callback_arg,
2709                             AC_FOUND_DEVICE,
2710                             &path, &cgd);
2711         xpt_release_path(&path);
2712
2713         return(1);
2714 }
2715
2716 static int
2717 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2718 {
2719         struct cam_path path;
2720         struct ccb_pathinq cpi;
2721         struct async_node *cur_entry;
2722
2723         cur_entry = (struct async_node *)arg;
2724
2725         xpt_compile_path(&path, /*periph*/NULL,
2726                          bus->sim->path_id,
2727                          CAM_TARGET_WILDCARD,
2728                          CAM_LUN_WILDCARD);
2729         xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
2730         cpi.ccb_h.func_code = XPT_PATH_INQ;
2731         xpt_action((union ccb *)&cpi);
2732         cur_entry->callback(cur_entry->callback_arg,
2733                             AC_PATH_REGISTERED,
2734                             &path, &cpi);
2735         xpt_release_path(&path);
2736
2737         return(1);
2738 }
2739
2740 void
2741 xpt_action(union ccb *start_ccb)
2742 {
2743         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2744
2745         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2746
2747         crit_enter();
2748
2749         switch (start_ccb->ccb_h.func_code) {
2750         case XPT_SCSI_IO:
2751         {
2752 #ifdef CAMDEBUG
2753                 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
2754                 struct cam_path *path;
2755
2756                 path = start_ccb->ccb_h.path;
2757 #endif
2758
2759                 /*
2760                  * For the sake of compatibility with SCSI-1
2761                  * devices that may not understand the identify
2762                  * message, we include lun information in the
2763                  * second byte of all commands.  SCSI-1 specifies
2764                  * that luns are a 3 bit value and reserves only 3
2765                  * bits for lun information in the CDB.  Later
2766                  * revisions of the SCSI spec allow for more than 8
2767                  * luns, but have deprecated lun information in the
2768                  * CDB.  So, if the lun won't fit, we must omit.
2769                  *
2770                  * Also be aware that during initial probing for devices,
2771                  * the inquiry information is unknown but initialized to 0.
2772                  * This means that this code will be exercised while probing
2773                  * devices with an ANSI revision greater than 2.
2774                  */
2775                 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2
2776                  && start_ccb->ccb_h.target_lun < 8
2777                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2778
2779                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2780                             start_ccb->ccb_h.target_lun << 5;
2781                 }
2782                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2783                 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n",
2784                           scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0],
2785                                        &path->device->inq_data),
2786                           scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes,
2787                                           cdb_str, sizeof(cdb_str))));
2788                 /* FALLTHROUGH */
2789         }
2790         case XPT_TARGET_IO:
2791         case XPT_CONT_TARGET_IO:
2792                 start_ccb->csio.sense_resid = 0;
2793                 start_ccb->csio.resid = 0;
2794                 /* FALLTHROUGH */
2795         case XPT_RESET_DEV:
2796         case XPT_ENG_EXEC:
2797         {
2798                 struct cam_path *path;
2799                 int runq;
2800
2801                 path = start_ccb->ccb_h.path;
2802
2803                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2804                 if (path->device->qfrozen_cnt == 0)
2805                         runq = xpt_schedule_dev_sendq(path->bus, path->device);
2806                 else
2807                         runq = 0;
2808                 if (runq != 0)
2809                         xpt_run_dev_sendq(path->bus);
2810                 break;
2811         }
2812         case XPT_SET_TRAN_SETTINGS:
2813         {
2814                 xpt_set_transfer_settings(&start_ccb->cts,
2815                                           start_ccb->ccb_h.path->device,
2816                                           /*async_update*/FALSE);
2817                 break;
2818         }
2819         case XPT_CALC_GEOMETRY:
2820         {
2821                 struct cam_sim *sim;
2822
2823                 /* Filter out garbage */
2824                 if (start_ccb->ccg.block_size == 0
2825                  || start_ccb->ccg.volume_size == 0) {
2826                         start_ccb->ccg.cylinders = 0;
2827                         start_ccb->ccg.heads = 0;
2828                         start_ccb->ccg.secs_per_track = 0;
2829                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2830                         break;
2831                 }
2832                 sim = start_ccb->ccb_h.path->bus->sim;
2833                 (*(sim->sim_action))(sim, start_ccb);
2834                 break;
2835         }
2836         case XPT_ABORT:
2837         {
2838                 union ccb* abort_ccb;
2839
2840                 abort_ccb = start_ccb->cab.abort_ccb;
2841                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2842
2843                         if (abort_ccb->ccb_h.pinfo.index >= 0) {
2844                                 struct cam_ccbq *ccbq;
2845
2846                                 ccbq = &abort_ccb->ccb_h.path->device->ccbq;
2847                                 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2848                                 abort_ccb->ccb_h.status =
2849                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2850                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2851                                 xpt_done(abort_ccb);
2852                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2853                                 break;
2854                         }
2855                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2856                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2857                                 /*
2858                                  * We've caught this ccb en route to
2859                                  * the SIM.  Flag it for abort and the
2860                                  * SIM will do so just before starting
2861                                  * real work on the CCB.
2862                                  */
2863                                 abort_ccb->ccb_h.status =
2864                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2865                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2866                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2867                                 break;
2868                         }
2869                 }
2870                 if (XPT_FC_IS_QUEUED(abort_ccb)
2871                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2872                         /*
2873                          * It's already completed but waiting
2874                          * for our SWI to get to it.
2875                          */
2876                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2877                         break;
2878                 }
2879                 /*
2880                  * If we weren't able to take care of the abort request
2881                  * in the XPT, pass the request down to the SIM for processing.
2882                  */
2883                 /* FALLTHROUGH */
2884         }
2885         case XPT_ACCEPT_TARGET_IO:
2886         case XPT_EN_LUN:
2887         case XPT_IMMED_NOTIFY:
2888         case XPT_NOTIFY_ACK:
2889         case XPT_GET_TRAN_SETTINGS:
2890         case XPT_RESET_BUS:
2891         {
2892                 struct cam_sim *sim;
2893
2894                 sim = start_ccb->ccb_h.path->bus->sim;
2895                 (*(sim->sim_action))(sim, start_ccb);
2896                 break;
2897         }
2898         case XPT_PATH_INQ:
2899         {
2900                 struct cam_sim *sim;
2901
2902                 sim = start_ccb->ccb_h.path->bus->sim;
2903                 (*(sim->sim_action))(sim, start_ccb);
2904                 break;
2905         }
2906         case XPT_PATH_STATS:
2907                 start_ccb->cpis.last_reset =
2908                         start_ccb->ccb_h.path->bus->last_reset;
2909                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2910                 break;
2911         case XPT_GDEV_TYPE:
2912         {
2913                 struct cam_ed *dev;
2914
2915                 dev = start_ccb->ccb_h.path->device;
2916                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2917                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2918                 } else {
2919                         struct ccb_getdev *cgd;
2920                         struct cam_eb *bus;
2921                         struct cam_et *tar;
2922
2923                         cgd = &start_ccb->cgd;
2924                         bus = cgd->ccb_h.path->bus;
2925                         tar = cgd->ccb_h.path->target;
2926                         cgd->inq_data = dev->inq_data;
2927                         cgd->ccb_h.status = CAM_REQ_CMP;
2928                         cgd->serial_num_len = dev->serial_num_len;
2929                         if ((dev->serial_num_len > 0)
2930                          && (dev->serial_num != NULL))
2931                                 bcopy(dev->serial_num, cgd->serial_num,
2932                                       dev->serial_num_len);
2933                 }
2934                 break;
2935         }
2936         case XPT_GDEV_STATS:
2937         {
2938                 struct cam_ed *dev;
2939
2940                 dev = start_ccb->ccb_h.path->device;
2941                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2942                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2943                 } else {
2944                         struct ccb_getdevstats *cgds;
2945                         struct cam_eb *bus;
2946                         struct cam_et *tar;
2947
2948                         cgds = &start_ccb->cgds;
2949                         bus = cgds->ccb_h.path->bus;
2950                         tar = cgds->ccb_h.path->target;
2951                         cgds->dev_openings = dev->ccbq.dev_openings;
2952                         cgds->dev_active = dev->ccbq.dev_active;
2953                         cgds->devq_openings = dev->ccbq.devq_openings;
2954                         cgds->devq_queued = dev->ccbq.queue.entries;
2955                         cgds->held = dev->ccbq.held;
2956                         cgds->last_reset = tar->last_reset;
2957                         cgds->maxtags = dev->quirk->maxtags;
2958                         cgds->mintags = dev->quirk->mintags;
2959                         if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2960                                 cgds->last_reset = bus->last_reset;
2961                         cgds->ccb_h.status = CAM_REQ_CMP;
2962                 }
2963                 break;
2964         }
2965         case XPT_GDEVLIST:
2966         {
2967                 struct cam_periph       *nperiph;
2968                 struct periph_list      *periph_head;
2969                 struct ccb_getdevlist   *cgdl;
2970                 int                     i;
2971                 struct cam_ed           *device;
2972                 int                     found;
2973
2974
2975                 found = 0;
2976
2977                 /*
2978                  * Don't want anyone mucking with our data.
2979                  */
2980                 device = start_ccb->ccb_h.path->device;
2981                 periph_head = &device->periphs;
2982                 cgdl = &start_ccb->cgdl;
2983
2984                 /*
2985                  * Check and see if the list has changed since the user
2986                  * last requested a list member.  If so, tell them that the
2987                  * list has changed, and therefore they need to start over
2988                  * from the beginning.
2989                  */
2990                 if ((cgdl->index != 0) &&
2991                     (cgdl->generation != device->generation)) {
2992                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2993                         break;
2994                 }
2995
2996                 /*
2997                  * Traverse the list of peripherals and attempt to find
2998                  * the requested peripheral.
2999                  */
3000                 for (nperiph = periph_head->slh_first, i = 0;
3001                      (nperiph != NULL) && (i <= cgdl->index);
3002                      nperiph = nperiph->periph_links.sle_next, i++) {
3003                         if (i == cgdl->index) {
3004                                 strncpy(cgdl->periph_name,
3005                                         nperiph->periph_name,
3006                                         DEV_IDLEN);
3007                                 cgdl->unit_number = nperiph->unit_number;
3008                                 found = 1;
3009                         }
3010                 }
3011                 if (found == 0) {
3012                         cgdl->status = CAM_GDEVLIST_ERROR;
3013                         break;
3014                 }
3015
3016                 if (nperiph == NULL)
3017                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
3018                 else
3019                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
3020
3021                 cgdl->index++;
3022                 cgdl->generation = device->generation;
3023
3024                 cgdl->ccb_h.status = CAM_REQ_CMP;
3025                 break;
3026         }
3027         case XPT_DEV_MATCH:
3028         {
3029                 dev_pos_type position_type;
3030                 struct ccb_dev_match *cdm;
3031                 int ret;
3032
3033                 cdm = &start_ccb->cdm;
3034
3035                 /*
3036                  * Prevent EDT changes while we traverse it.
3037                  */
3038                 /*
3039                  * There are two ways of getting at information in the EDT.
3040                  * The first way is via the primary EDT tree.  It starts
3041                  * with a list of busses, then a list of targets on a bus,
3042                  * then devices/luns on a target, and then peripherals on a
3043                  * device/lun.  The "other" way is by the peripheral driver
3044                  * lists.  The peripheral driver lists are organized by
3045                  * peripheral driver.  (obviously)  So it makes sense to
3046                  * use the peripheral driver list if the user is looking
3047                  * for something like "da1", or all "da" devices.  If the
3048                  * user is looking for something on a particular bus/target
3049                  * or lun, it's generally better to go through the EDT tree.
3050                  */
3051
3052                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
3053                         position_type = cdm->pos.position_type;
3054                 else {
3055                         int i;
3056
3057                         position_type = CAM_DEV_POS_NONE;
3058
3059                         for (i = 0; i < cdm->num_patterns; i++) {
3060                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
3061                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
3062                                         position_type = CAM_DEV_POS_EDT;
3063                                         break;
3064                                 }
3065                         }
3066
3067                         if (cdm->num_patterns == 0)
3068                                 position_type = CAM_DEV_POS_EDT;
3069                         else if (position_type == CAM_DEV_POS_NONE)
3070                                 position_type = CAM_DEV_POS_PDRV;
3071                 }
3072
3073                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
3074                 case CAM_DEV_POS_EDT:
3075                         ret = xptedtmatch(cdm);
3076                         break;
3077                 case CAM_DEV_POS_PDRV:
3078                         ret = xptperiphlistmatch(cdm);
3079                         break;
3080                 default:
3081                         cdm->status = CAM_DEV_MATCH_ERROR;
3082                         break;
3083                 }
3084
3085                 if (cdm->status == CAM_DEV_MATCH_ERROR)
3086                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
3087                 else
3088                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3089
3090                 break;
3091         }
3092         case XPT_SASYNC_CB:
3093         {
3094                 struct ccb_setasync *csa;
3095                 struct async_node *cur_entry;
3096                 struct async_list *async_head;
3097                 u_int32_t added;
3098
3099                 csa = &start_ccb->csa;
3100                 added = csa->event_enable;
3101                 async_head = &csa->ccb_h.path->device->asyncs;
3102
3103                 /*
3104                  * If there is already an entry for us, simply
3105                  * update it.
3106                  */
3107                 cur_entry = SLIST_FIRST(async_head);
3108                 while (cur_entry != NULL) {
3109                         if ((cur_entry->callback_arg == csa->callback_arg)
3110                          && (cur_entry->callback == csa->callback))
3111                                 break;
3112                         cur_entry = SLIST_NEXT(cur_entry, links);
3113                 }
3114
3115                 if (cur_entry != NULL) {
3116                         /*
3117                          * If the request has no flags set,
3118                          * remove the entry.
3119                          */
3120                         added &= ~cur_entry->event_enable;
3121                         if (csa->event_enable == 0) {
3122                                 SLIST_REMOVE(async_head, cur_entry,
3123                                              async_node, links);
3124                                 csa->ccb_h.path->device->refcount--;
3125                                 kfree(cur_entry, M_DEVBUF);
3126                         } else {
3127                                 cur_entry->event_enable = csa->event_enable;
3128                         }
3129                 } else {
3130                         cur_entry = kmalloc(sizeof(*cur_entry),
3131                                             M_DEVBUF, M_INTWAIT);
3132                         cur_entry->event_enable = csa->event_enable;
3133                         cur_entry->callback_arg = csa->callback_arg;
3134                         cur_entry->callback = csa->callback;
3135                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3136                         csa->ccb_h.path->device->refcount++;
3137                 }
3138
3139                 if ((added & AC_FOUND_DEVICE) != 0) {
3140                         /*
3141                          * Get this peripheral up to date with all
3142                          * the currently existing devices.
3143                          */
3144                         xpt_for_all_devices(xptsetasyncfunc, cur_entry);
3145                 }
3146                 if ((added & AC_PATH_REGISTERED) != 0) {
3147                         /*
3148                          * Get this peripheral up to date with all
3149                          * the currently existing busses.
3150                          */
3151                         xpt_for_all_busses(xptsetasyncbusfunc, cur_entry);
3152                 }
3153                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3154                 break;
3155         }
3156         case XPT_REL_SIMQ:
3157         {
3158                 struct ccb_relsim *crs;
3159                 struct cam_ed *dev;
3160
3161                 crs = &start_ccb->crs;
3162                 dev = crs->ccb_h.path->device;
3163                 if (dev == NULL) {
3164
3165                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3166                         break;
3167                 }
3168
3169                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3170
3171                         if ((dev->inq_data.flags & SID_CmdQue) != 0) {
3172
3173                                 /* Don't ever go below one opening */
3174                                 if (crs->openings > 0) {
3175                                         xpt_dev_ccbq_resize(crs->ccb_h.path,
3176                                                             crs->openings);
3177
3178                                         if (bootverbose) {
3179                                                 xpt_print_path(crs->ccb_h.path);
3180                                                 kprintf("tagged openings "
3181                                                        "now %d\n",
3182                                                        crs->openings);
3183                                         }
3184                                 }
3185                         }
3186                 }
3187
3188                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3189
3190                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3191
3192                                 /*
3193                                  * Just extend the old timeout and decrement
3194                                  * the freeze count so that a single timeout
3195                                  * is sufficient for releasing the queue.
3196                                  */
3197                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3198                                 callout_stop(&dev->c_handle);
3199                         } else {
3200
3201                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3202                         }
3203
3204                         callout_reset(&dev->c_handle,
3205                                       (crs->release_timeout * hz) / 1000,
3206                                       xpt_release_devq_timeout, dev);
3207
3208                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3209
3210                 }
3211
3212                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3213
3214                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3215                                 /*
3216                                  * Decrement the freeze count so that a single
3217                                  * completion is still sufficient to unfreeze
3218                                  * the queue.
3219                                  */
3220                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3221                         } else {
3222
3223                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3224                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3225                         }
3226                 }
3227
3228                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3229
3230                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3231                          || (dev->ccbq.dev_active == 0)) {
3232
3233                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3234                         } else {
3235
3236                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3237                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3238                         }
3239                 }
3240
3241                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) {
3242
3243                         xpt_release_devq(crs->ccb_h.path, /*count*/1,
3244                                          /*run_queue*/TRUE);
3245                 }
3246                 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt;
3247                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3248                 break;
3249         }
3250         case XPT_SCAN_BUS:
3251                 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb);
3252                 break;
3253         case XPT_SCAN_LUN:
3254                 xpt_scan_lun(start_ccb->ccb_h.path->periph,
3255                              start_ccb->ccb_h.path, start_ccb->crcn.flags,
3256                              start_ccb);
3257                 break;
3258         case XPT_DEBUG: {
3259 #ifdef CAMDEBUG
3260 #ifdef CAM_DEBUG_DELAY
3261                 cam_debug_delay = CAM_DEBUG_DELAY;
3262 #endif
3263                 cam_dflags = start_ccb->cdbg.flags;
3264                 if (cam_dpath != NULL) {
3265                         xpt_free_path(cam_dpath);
3266                         cam_dpath = NULL;
3267                 }
3268
3269                 if (cam_dflags != CAM_DEBUG_NONE) {
3270                         if (xpt_create_path(&cam_dpath, xpt_periph,
3271                                             start_ccb->ccb_h.path_id,
3272                                             start_ccb->ccb_h.target_id,
3273                                             start_ccb->ccb_h.target_lun) !=
3274                                             CAM_REQ_CMP) {
3275                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3276                                 cam_dflags = CAM_DEBUG_NONE;
3277                         } else {
3278                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3279                                 xpt_print_path(cam_dpath);
3280                                 kprintf("debugging flags now %x\n", cam_dflags);
3281                         }
3282                 } else {
3283                         cam_dpath = NULL;
3284                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3285                 }
3286 #else /* !CAMDEBUG */
3287                 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3288 #endif /* CAMDEBUG */
3289                 break;
3290         }
3291         case XPT_NOOP:
3292                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3293                         xpt_freeze_devq(start_ccb->ccb_h.path, 1);
3294                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3295                 break;
3296         default:
3297         case XPT_SDEV_TYPE:
3298         case XPT_TERM_IO:
3299         case XPT_ENG_INQ:
3300                 /* XXX Implement */
3301                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3302                 break;
3303         }
3304         crit_exit();
3305 }
3306
3307 void
3308 xpt_polled_action(union ccb *start_ccb)
3309 {
3310         u_int32_t timeout;
3311         struct    cam_sim *sim;
3312         struct    cam_devq *devq;
3313         struct    cam_ed *dev;
3314
3315         timeout = start_ccb->ccb_h.timeout;
3316         sim = start_ccb->ccb_h.path->bus->sim;
3317         devq = sim->devq;
3318         dev = start_ccb->ccb_h.path->device;
3319
3320         crit_enter();
3321
3322         /*
3323          * Steal an opening so that no other queued requests
3324          * can get it before us while we simulate interrupts.
3325          */
3326         dev->ccbq.devq_openings--;
3327         dev->ccbq.dev_openings--;
3328
3329         while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0)
3330            && (--timeout > 0)) {
3331                 DELAY(1000);
3332                 (*(sim->sim_poll))(sim);
3333                 swi_camnet(NULL, NULL);
3334                 swi_cambio(NULL, NULL);
3335         }
3336
3337         dev->ccbq.devq_openings++;
3338         dev->ccbq.dev_openings++;
3339
3340         if (timeout != 0) {
3341                 xpt_action(start_ccb);
3342                 while(--timeout > 0) {
3343                         (*(sim->sim_poll))(sim);
3344                         swi_camnet(NULL, NULL);
3345                         swi_cambio(NULL, NULL);
3346                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3347                             != CAM_REQ_INPROG)
3348                                 break;
3349                         DELAY(1000);
3350                 }
3351                 if (timeout == 0) {
3352                         /*
3353                          * XXX Is it worth adding a sim_timeout entry
3354                          * point so we can attempt recovery?  If
3355                          * this is only used for dumps, I don't think
3356                          * it is.
3357                          */
3358                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3359                 }
3360         } else {
3361                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3362         }
3363         crit_exit();
3364 }
3365
3366 /*
3367  * Schedule a peripheral driver to receive a ccb when it's
3368  * target device has space for more transactions.
3369  */
3370 void
3371 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority)
3372 {
3373         struct cam_ed *device;
3374         int runq;
3375
3376         CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3377         device = perph->path->device;
3378         crit_enter();
3379         if (periph_is_queued(perph)) {
3380                 /* Simply reorder based on new priority */
3381                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3382                           ("   change priority to %d\n", new_priority));
3383                 if (new_priority < perph->pinfo.priority) {
3384                         camq_change_priority(&device->drvq,
3385                                              perph->pinfo.index,
3386                                              new_priority);
3387                 }
3388                 runq = 0;
3389         } else {
3390                 /* New entry on the queue */
3391                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3392                           ("   added periph to queue\n"));
3393                 perph->pinfo.priority = new_priority;
3394                 perph->pinfo.generation = ++device->drvq.generation;
3395                 camq_insert(&device->drvq, &perph->pinfo);
3396                 runq = xpt_schedule_dev_allocq(perph->path->bus, device);
3397         }
3398         crit_exit();
3399         if (runq != 0) {
3400                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3401                           ("   calling xpt_run_devq\n"));
3402                 xpt_run_dev_allocq(perph->path->bus);
3403         }
3404 }
3405
3406
3407 /*
3408  * Schedule a device to run on a given queue.
3409  * If the device was inserted as a new entry on the queue,
3410  * return 1 meaning the device queue should be run. If we
3411  * were already queued, implying someone else has already
3412  * started the queue, return 0 so the caller doesn't attempt
3413  * to run the queue.  Must be run in a critical section.
3414  */
3415 static int
3416 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3417                  u_int32_t new_priority)
3418 {
3419         int retval;
3420         u_int32_t old_priority;
3421
3422         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3423
3424         old_priority = pinfo->priority;
3425
3426         /*
3427          * Are we already queued?
3428          */
3429         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3430                 /* Simply reorder based on new priority */
3431                 if (new_priority < old_priority) {
3432                         camq_change_priority(queue, pinfo->index,
3433                                              new_priority);
3434                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3435                                         ("changed priority to %d\n",
3436                                          new_priority));
3437                 }
3438                 retval = 0;
3439         } else {
3440                 /* New entry on the queue */
3441                 if (new_priority < old_priority)
3442                         pinfo->priority = new_priority;
3443
3444                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3445                                 ("Inserting onto queue\n"));
3446                 pinfo->generation = ++queue->generation;
3447                 camq_insert(queue, pinfo);
3448                 retval = 1;
3449         }
3450         return (retval);
3451 }
3452
3453 static void
3454 xpt_run_dev_allocq(struct cam_eb *bus)
3455 {
3456         struct  cam_devq *devq;
3457
3458         if ((devq = bus->sim->devq) == NULL) {
3459                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n"));
3460                 return;
3461         }
3462         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n"));
3463
3464         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3465                         ("   qfrozen_cnt == 0x%x, entries == %d, "
3466                          "openings == %d, active == %d\n",
3467                          devq->alloc_queue.qfrozen_cnt,
3468                          devq->alloc_queue.entries,
3469                          devq->alloc_openings,
3470                          devq->alloc_active));
3471
3472         crit_enter();
3473         devq->alloc_queue.qfrozen_cnt++;
3474         while ((devq->alloc_queue.entries > 0)
3475             && (devq->alloc_openings > 0)
3476             && (devq->alloc_queue.qfrozen_cnt <= 1)) {
3477                 struct  cam_ed_qinfo *qinfo;
3478                 struct  cam_ed *device;
3479                 union   ccb *work_ccb;
3480                 struct  cam_periph *drv;
3481                 struct  camq *drvq;
3482
3483                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
3484                                                            CAMQ_HEAD);
3485                 device = qinfo->device;
3486
3487                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3488                                 ("running device %p\n", device));
3489
3490                 drvq = &device->drvq;
3491
3492 #ifdef CAMDEBUG
3493                 if (drvq->entries <= 0) {
3494                         panic("xpt_run_dev_allocq: "
3495                               "Device on queue without any work to do");
3496                 }
3497 #endif
3498                 if ((work_ccb = xpt_get_ccb(device)) != NULL) {
3499                         devq->alloc_openings--;
3500                         devq->alloc_active++;
3501                         drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD);
3502                         crit_exit();
3503                         xpt_setup_ccb(&work_ccb->ccb_h, drv->path,
3504                                       drv->pinfo.priority);
3505                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3506                                         ("calling periph start\n"));
3507                         drv->periph_start(drv, work_ccb);
3508                 } else {
3509                         /*
3510                          * Malloc failure in alloc_ccb
3511                          */
3512                         /*
3513                          * XXX add us to a list to be run from free_ccb
3514                          * if we don't have any ccbs active on this
3515                          * device queue otherwise we may never get run
3516                          * again.
3517                          */
3518                         break;
3519                 }
3520
3521                 /* Raise IPL for possible insertion and test at top of loop */
3522                 crit_enter();
3523
3524                 if (drvq->entries > 0) {
3525                         /* We have more work.  Attempt to reschedule */
3526                         xpt_schedule_dev_allocq(bus, device);
3527                 }
3528         }
3529         devq->alloc_queue.qfrozen_cnt--;
3530         crit_exit();
3531 }
3532
3533 static void
3534 xpt_run_dev_sendq(struct cam_eb *bus)
3535 {
3536         struct  cam_devq *devq;
3537
3538         if ((devq = bus->sim->devq) == NULL) {
3539                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n"));
3540                 return;
3541         }
3542         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n"));
3543
3544         crit_enter();
3545         devq->send_queue.qfrozen_cnt++;
3546         while ((devq->send_queue.entries > 0)
3547             && (devq->send_openings > 0)) {
3548                 struct  cam_ed_qinfo *qinfo;
3549                 struct  cam_ed *device;
3550                 union ccb *work_ccb;
3551                 struct  cam_sim *sim;
3552
3553                 if (devq->send_queue.qfrozen_cnt > 1) {
3554                         break;
3555                 }
3556
3557                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
3558                                                            CAMQ_HEAD);
3559                 device = qinfo->device;
3560
3561                 /*
3562                  * If the device has been "frozen", don't attempt
3563                  * to run it.
3564                  */
3565                 if (device->qfrozen_cnt > 0) {
3566                         continue;
3567                 }
3568
3569                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3570                                 ("running device %p\n", device));
3571
3572                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3573                 if (work_ccb == NULL) {
3574                         kprintf("device on run queue with no ccbs???\n");
3575                         continue;
3576                 }
3577
3578                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3579
3580                         if (num_highpower <= 0) {
3581                                 /*
3582                                  * We got a high power command, but we
3583                                  * don't have any available slots.  Freeze
3584                                  * the device queue until we have a slot
3585                                  * available.
3586                                  */
3587                                 device->qfrozen_cnt++;
3588                                 STAILQ_INSERT_TAIL(&highpowerq,
3589                                                    &work_ccb->ccb_h,
3590                                                    xpt_links.stqe);
3591
3592                                 continue;
3593                         } else {
3594                                 /*
3595                                  * Consume a high power slot while
3596                                  * this ccb runs.
3597                                  */
3598                                 num_highpower--;
3599                         }
3600                 }
3601                 devq->active_dev = device;
3602                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3603
3604                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3605
3606                 devq->send_openings--;
3607                 devq->send_active++;
3608
3609                 if (device->ccbq.queue.entries > 0)
3610                         xpt_schedule_dev_sendq(bus, device);
3611
3612                 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){
3613                         /*
3614                          * The client wants to freeze the queue
3615                          * after this CCB is sent.
3616                          */
3617                         device->qfrozen_cnt++;
3618                 }
3619
3620                 /* In Target mode, the peripheral driver knows best... */
3621                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3622                         if ((device->inq_flags & SID_CmdQue) != 0
3623                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3624                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3625                         else
3626                                 /*
3627                                  * Clear this in case of a retried CCB that
3628                                  * failed due to a rejected tag.
3629                                  */
3630                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3631                 }
3632
3633                 /*
3634                  * Device queues can be shared among multiple sim instances
3635                  * that reside on different busses.  Use the SIM in the queue
3636                  * CCB's path, rather than the one in the bus that was passed
3637                  * into this function.
3638                  */
3639                 sim = work_ccb->ccb_h.path->bus->sim;
3640                 (*(sim->sim_action))(sim, work_ccb);
3641
3642                 devq->active_dev = NULL;
3643                 /* Raise IPL for possible insertion and test at top of loop */
3644         }
3645         devq->send_queue.qfrozen_cnt--;
3646         crit_exit();
3647 }
3648
3649 /*
3650  * This function merges stuff from the slave ccb into the master ccb, while
3651  * keeping important fields in the master ccb constant.
3652  */
3653 void
3654 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3655 {
3656         /*
3657          * Pull fields that are valid for peripheral drivers to set
3658          * into the master CCB along with the CCB "payload".
3659          */
3660         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3661         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3662         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3663         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3664         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3665               sizeof(union ccb) - sizeof(struct ccb_hdr));
3666 }
3667
3668 void
3669 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3670 {
3671         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3672         callout_init(&ccb_h->timeout_ch);
3673         ccb_h->pinfo.priority = priority;
3674         ccb_h->path = path;
3675         ccb_h->path_id = path->bus->path_id;
3676         if (path->target)
3677                 ccb_h->target_id = path->target->target_id;
3678         else
3679                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3680         if (path->device) {
3681                 ccb_h->target_lun = path->device->lun_id;
3682                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3683         } else {
3684                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3685         }
3686         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3687         ccb_h->flags = 0;
3688 }
3689
3690 /* Path manipulation functions */
3691 cam_status
3692 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3693                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3694 {
3695         struct     cam_path *path;
3696         cam_status status;
3697
3698         path = kmalloc(sizeof(*path), M_DEVBUF, M_INTWAIT);
3699         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3700         if (status != CAM_REQ_CMP) {
3701                 kfree(path, M_DEVBUF);
3702                 path = NULL;
3703         }
3704         *new_path_ptr = path;
3705         return (status);
3706 }
3707
3708 static cam_status
3709 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3710                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3711 {
3712         struct       cam_eb *bus;
3713         struct       cam_et *target;
3714         struct       cam_ed *device;
3715         cam_status   status;
3716
3717         status = CAM_REQ_CMP;   /* Completed without error */
3718         target = NULL;          /* Wildcarded */
3719         device = NULL;          /* Wildcarded */
3720
3721         /*
3722          * We will potentially modify the EDT, so block interrupts
3723          * that may attempt to create cam paths.
3724          */
3725         crit_enter();
3726         bus = xpt_find_bus(path_id);
3727         if (bus == NULL) {
3728                 status = CAM_PATH_INVALID;
3729         } else {
3730                 target = xpt_find_target(bus, target_id);
3731                 if (target == NULL) {
3732                         /* Create one */
3733                         struct cam_et *new_target;
3734
3735                         new_target = xpt_alloc_target(bus, target_id);
3736                         if (new_target == NULL) {
3737                                 status = CAM_RESRC_UNAVAIL;
3738                         } else {
3739                                 target = new_target;
3740                         }
3741                 }
3742                 if (target != NULL) {
3743                         device = xpt_find_device(target, lun_id);
3744                         if (device == NULL) {
3745                                 /* Create one */
3746                                 struct cam_ed *new_device;
3747
3748                                 new_device = xpt_alloc_device(bus,
3749                                                               target,
3750                                                               lun_id);
3751                                 if (new_device == NULL) {
3752                                         status = CAM_RESRC_UNAVAIL;
3753                                 } else {
3754                                         device = new_device;
3755                                 }
3756                         }
3757                 }
3758         }
3759         crit_exit();
3760
3761         /*
3762          * Only touch the user's data if we are successful.
3763          */
3764         if (status == CAM_REQ_CMP) {
3765                 new_path->periph = perph;
3766                 new_path->bus = bus;
3767                 new_path->target = target;
3768                 new_path->device = device;
3769                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3770         } else {
3771                 if (device != NULL)
3772                         xpt_release_device(bus, target, device);
3773                 if (target != NULL)
3774                         xpt_release_target(bus, target);
3775                 if (bus != NULL)
3776                         xpt_release_bus(bus);
3777         }
3778         return (status);
3779 }
3780
3781 static void
3782 xpt_release_path(struct cam_path *path)
3783 {
3784         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3785         if (path->device != NULL) {
3786                 xpt_release_device(path->bus, path->target, path->device);
3787                 path->device = NULL;
3788         }
3789         if (path->target != NULL) {
3790                 xpt_release_target(path->bus, path->target);
3791                 path->target = NULL;
3792         }
3793         if (path->bus != NULL) {
3794                 xpt_release_bus(path->bus);
3795                 path->bus = NULL;
3796         }
3797 }
3798
3799 void
3800 xpt_free_path(struct cam_path *path)
3801 {
3802         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3803         xpt_release_path(path);
3804         kfree(path, M_DEVBUF);
3805 }
3806
3807
3808 /*
3809  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3810  * in path1, 2 for match with wildcards in path2.
3811  */
3812 int
3813 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3814 {
3815         int retval = 0;
3816
3817         if (path1->bus != path2->bus) {
3818                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3819                         retval = 1;
3820                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3821                         retval = 2;
3822                 else
3823                         return (-1);
3824         }
3825         if (path1->target != path2->target) {
3826                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3827                         if (retval == 0)
3828                                 retval = 1;
3829                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3830                         retval = 2;
3831                 else
3832                         return (-1);
3833         }
3834         if (path1->device != path2->device) {
3835                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3836                         if (retval == 0)
3837                                 retval = 1;
3838                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3839                         retval = 2;
3840                 else
3841                         return (-1);
3842         }
3843         return (retval);
3844 }
3845
3846 void
3847 xpt_print_path(struct cam_path *path)
3848 {
3849         if (path == NULL)
3850                 kprintf("(nopath): ");
3851         else {
3852                 if (path->periph != NULL)
3853                         kprintf("(%s%d:", path->periph->periph_name,
3854                                path->periph->unit_number);
3855                 else
3856                         kprintf("(noperiph:");
3857
3858                 if (path->bus != NULL)
3859                         kprintf("%s%d:%d:", path->bus->sim->sim_name,
3860                                path->bus->sim->unit_number,
3861                                path->bus->sim->bus_id);
3862                 else
3863                         kprintf("nobus:");
3864
3865                 if (path->target != NULL)
3866                         kprintf("%d:", path->target->target_id);
3867                 else
3868                         kprintf("X:");
3869
3870                 if (path->device != NULL)
3871                         kprintf("%d): ", path->device->lun_id);
3872                 else
3873                         kprintf("X): ");
3874         }
3875 }
3876
3877 path_id_t
3878 xpt_path_path_id(struct cam_path *path)
3879 {
3880         return(path->bus->path_id);
3881 }
3882
3883 target_id_t
3884 xpt_path_target_id(struct cam_path *path)
3885 {
3886         if (path->target != NULL)
3887                 return (path->target->target_id);
3888         else
3889                 return (CAM_TARGET_WILDCARD);
3890 }
3891
3892 lun_id_t
3893 xpt_path_lun_id(struct cam_path *path)
3894 {
3895         if (path->device != NULL)
3896                 return (path->device->lun_id);
3897         else
3898                 return (CAM_LUN_WILDCARD);
3899 }
3900
3901 struct cam_sim *
3902 xpt_path_sim(struct cam_path *path)
3903 {
3904         return (path->bus->sim);
3905 }
3906
3907 struct cam_periph*
3908 xpt_path_periph(struct cam_path *path)
3909 {
3910         return (path->periph);
3911 }
3912
3913 /*
3914  * Release a CAM control block for the caller.  Remit the cost of the structure
3915  * to the device referenced by the path.  If the this device had no 'credits'
3916  * and peripheral drivers have registered async callbacks for this notification
3917  * call them now.
3918  */
3919 void
3920 xpt_release_ccb(union ccb *free_ccb)
3921 {
3922         struct   cam_path *path;
3923         struct   cam_ed *device;
3924         struct   cam_eb *bus;
3925
3926         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3927         path = free_ccb->ccb_h.path;
3928         device = path->device;
3929         bus = path->bus;
3930         crit_enter();
3931         cam_ccbq_release_opening(&device->ccbq);
3932         if (xpt_ccb_count > xpt_max_ccbs) {
3933                 xpt_free_ccb(free_ccb);
3934                 xpt_ccb_count--;
3935         } else {
3936                 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle);
3937         }
3938         if (bus->sim->devq) {
3939                 bus->sim->devq->alloc_openings++;
3940                 bus->sim->devq->alloc_active--;
3941         }
3942         /* XXX Turn this into an inline function - xpt_run_device?? */
3943         if ((device_is_alloc_queued(device) == 0)
3944          && (device->drvq.entries > 0)) {
3945                 xpt_schedule_dev_allocq(bus, device);
3946         }
3947         crit_exit();
3948         if (bus->sim->devq && dev_allocq_is_runnable(bus->sim->devq))
3949                 xpt_run_dev_allocq(bus);
3950 }
3951
3952 /* Functions accessed by SIM drivers */
3953
3954 /*
3955  * A sim structure, listing the SIM entry points and instance
3956  * identification info is passed to xpt_bus_register to hook the SIM
3957  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
3958  * for this new bus and places it in the array of busses and assigns
3959  * it a path_id.  The path_id may be influenced by "hard wiring"
3960  * information specified by the user.  Once interrupt services are
3961  * availible, the bus will be probed.
3962  */
3963 int32_t
3964 xpt_bus_register(struct cam_sim *sim, u_int32_t bus)
3965 {
3966         struct cam_eb *new_bus;
3967         struct cam_eb *old_bus;
3968         struct ccb_pathinq cpi;
3969
3970         sim->bus_id = bus;
3971         new_bus = kmalloc(sizeof(*new_bus), M_DEVBUF, M_INTWAIT);
3972
3973         if (strcmp(sim->sim_name, "xpt") != 0) {
3974                 sim->path_id =
3975                     xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3976         }
3977
3978         TAILQ_INIT(&new_bus->et_entries);
3979         new_bus->path_id = sim->path_id;
3980         new_bus->sim = sim;
3981         ++sim->refcount;
3982         timevalclear(&new_bus->last_reset);
3983         new_bus->flags = 0;
3984         new_bus->refcount = 1;  /* Held until a bus_deregister event */
3985         new_bus->generation = 0;
3986         crit_enter();
3987         old_bus = TAILQ_FIRST(&xpt_busses);
3988         while (old_bus != NULL
3989             && old_bus->path_id < new_bus->path_id)
3990                 old_bus = TAILQ_NEXT(old_bus, links);
3991         if (old_bus != NULL)
3992                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3993         else
3994                 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links);
3995         bus_generation++;
3996         crit_exit();
3997
3998         /* Notify interested parties */
3999         if (sim->path_id != CAM_XPT_PATH_ID) {
4000                 struct cam_path path;
4001
4002                 xpt_compile_path(&path, /*periph*/NULL, sim->path_id,
4003                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4004                 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
4005                 cpi.ccb_h.func_code = XPT_PATH_INQ;
4006                 xpt_action((union ccb *)&cpi);
4007                 xpt_async(AC_PATH_REGISTERED, xpt_periph->path, &cpi);
4008                 xpt_release_path(&path);
4009         }
4010         return (CAM_SUCCESS);
4011 }
4012
4013 /*
4014  * Deregister a bus.  We must clean out all transactions pending on the bus.
4015  * This routine is typically called prior to cam_sim_free() (e.g. see
4016  * dev/usbmisc/umass/umass.c)
4017  */
4018 int32_t
4019 xpt_bus_deregister(path_id_t pathid)
4020 {
4021         struct cam_path bus_path;
4022         cam_status status;
4023
4024         status = xpt_compile_path(&bus_path, NULL, pathid,
4025                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4026         if (status != CAM_REQ_CMP)
4027                 return (status);
4028
4029         /*
4030          * This should clear out all pending requests and timeouts, but
4031          * the ccb's may be queued to a software interrupt.
4032          *
4033          * XXX AC_LOST_DEVICE does not precisely abort the pending requests,
4034          * and it really ought to.
4035          */
4036         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4037         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4038
4039         /* make sure all responses have been processed */
4040         camisr(&cam_netq);
4041         camisr(&cam_bioq);
4042
4043         /* Release the reference count held while registered. */
4044         xpt_release_bus(bus_path.bus);
4045         xpt_release_path(&bus_path);
4046
4047         return (CAM_REQ_CMP);
4048 }
4049
4050 static path_id_t
4051 xptnextfreepathid(void)
4052 {
4053         struct cam_eb *bus;
4054         path_id_t pathid;
4055         char *strval;
4056
4057         pathid = 0;
4058         bus = TAILQ_FIRST(&xpt_busses);
4059 retry:
4060         /* Find an unoccupied pathid */
4061         while (bus != NULL
4062             && bus->path_id <= pathid) {
4063                 if (bus->path_id == pathid)
4064                         pathid++;
4065                 bus = TAILQ_NEXT(bus, links);
4066         }
4067
4068         /*
4069          * Ensure that this pathid is not reserved for
4070          * a bus that may be registered in the future.
4071          */
4072         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4073                 ++pathid;
4074                 /* Start the search over */
4075                 goto retry;
4076         }
4077         return (pathid);
4078 }
4079
4080 static path_id_t
4081 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4082 {
4083         path_id_t pathid;
4084         int i, dunit, val;
4085         char buf[32], *strval;
4086
4087         pathid = CAM_XPT_PATH_ID;
4088         ksnprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4089         i = -1;
4090         while ((i = resource_locate(i, "scbus")) != -1) {
4091                 dunit = resource_query_unit(i);
4092                 if (dunit < 0)          /* unwired?! */
4093                         continue;
4094                 if (resource_string_value("scbus", dunit, "at", &strval) != 0)
4095                         continue;
4096                 if (strcmp(buf, strval) != 0)
4097                         continue;
4098                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4099                         if (sim_bus == val) {
4100                                 pathid = dunit;
4101                                 break;
4102                         }
4103                 } else if (sim_bus == 0) {
4104                         /* Unspecified matches bus 0 */
4105                         pathid = dunit;
4106                         break;
4107                 } else {
4108                         kprintf("Ambiguous scbus configuration for %s%d "
4109                                "bus %d, cannot wire down.  The kernel "
4110                                "config entry for scbus%d should "
4111                                "specify a controller bus.\n"
4112                                "Scbus will be assigned dynamically.\n",
4113                                sim_name, sim_unit, sim_bus, dunit);
4114                         break;
4115                 }
4116         }
4117
4118         if (pathid == CAM_XPT_PATH_ID)
4119                 pathid = xptnextfreepathid();
4120         return (pathid);
4121 }
4122
4123 void
4124 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4125 {
4126         struct cam_eb *bus;
4127         struct cam_et *target, *next_target;
4128         struct cam_ed *device, *next_device;
4129
4130         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n"));
4131
4132         /*
4133          * Most async events come from a CAM interrupt context.  In
4134          * a few cases, the error recovery code at the peripheral layer,
4135          * which may run from our SWI or a process context, may signal
4136          * deferred events with a call to xpt_async. Ensure async
4137          * notifications are serialized by blocking cam interrupts.
4138          */
4139         crit_enter();
4140
4141         bus = path->bus;
4142
4143         if (async_code == AC_BUS_RESET) {
4144                 /* Update our notion of when the last reset occurred */
4145                 microuptime(&bus->last_reset);
4146         }
4147
4148         for (target = TAILQ_FIRST(&bus->et_entries);
4149              target != NULL;
4150              target = next_target) {
4151
4152                 next_target = TAILQ_NEXT(target, links);
4153
4154                 if (path->target != target
4155                  && path->target->target_id != CAM_TARGET_WILDCARD
4156                  && target->target_id != CAM_TARGET_WILDCARD)
4157                         continue;
4158
4159                 if (async_code == AC_SENT_BDR) {
4160                         /* Update our notion of when the last reset occurred */
4161                         microuptime(&path->target->last_reset);
4162                 }
4163
4164                 for (device = TAILQ_FIRST(&target->ed_entries);
4165                      device != NULL;
4166                      device = next_device) {
4167
4168                         next_device = TAILQ_NEXT(device, links);
4169
4170                         if (path->device != device
4171                          && path->device->lun_id != CAM_LUN_WILDCARD
4172                          && device->lun_id != CAM_LUN_WILDCARD)
4173                                 continue;
4174
4175                         xpt_dev_async(async_code, bus, target,
4176                                       device, async_arg);
4177
4178                         xpt_async_bcast(&device->asyncs, async_code,
4179                                         path, async_arg);
4180                 }
4181         }
4182
4183         /*
4184          * If this wasn't a fully wildcarded async, tell all
4185          * clients that want all async events.
4186          */
4187         if (bus != xpt_periph->path->bus)
4188                 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code,
4189                                 path, async_arg);
4190         crit_exit();
4191 }
4192
4193 static void
4194 xpt_async_bcast(struct async_list *async_head,
4195                 u_int32_t async_code,
4196                 struct cam_path *path, void *async_arg)
4197 {
4198         struct async_node *cur_entry;
4199
4200         cur_entry = SLIST_FIRST(async_head);
4201         while (cur_entry != NULL) {
4202                 struct async_node *next_entry;
4203                 /*
4204                  * Grab the next list entry before we call the current
4205                  * entry's callback.  This is because the callback function
4206                  * can delete its async callback entry.
4207                  */
4208                 next_entry = SLIST_NEXT(cur_entry, links);
4209                 if ((cur_entry->event_enable & async_code) != 0)
4210                         cur_entry->callback(cur_entry->callback_arg,
4211                                             async_code, path,
4212                                             async_arg);
4213                 cur_entry = next_entry;
4214         }
4215 }
4216
4217 /*
4218  * Handle any per-device event notifications that require action by the XPT.
4219  */
4220 static void
4221 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target,
4222               struct cam_ed *device, void *async_arg)
4223 {
4224         cam_status status;
4225         struct cam_path newpath;
4226
4227         /*
4228          * We only need to handle events for real devices.
4229          */
4230         if (target->target_id == CAM_TARGET_WILDCARD
4231          || device->lun_id == CAM_LUN_WILDCARD)
4232                 return;
4233
4234         /*
4235          * We need our own path with wildcards expanded to
4236          * handle certain types of events.
4237          */
4238         if ((async_code == AC_SENT_BDR)
4239          || (async_code == AC_BUS_RESET)
4240          || (async_code == AC_INQ_CHANGED))
4241                 status = xpt_compile_path(&newpath, NULL,
4242                                           bus->path_id,
4243                                           target->target_id,
4244                                           device->lun_id);
4245         else
4246                 status = CAM_REQ_CMP_ERR;
4247
4248         if (status == CAM_REQ_CMP) {
4249
4250                 /*
4251                  * Allow transfer negotiation to occur in a
4252                  * tag free environment.
4253                  */
4254                 if (async_code == AC_SENT_BDR
4255                  || async_code == AC_BUS_RESET)
4256                         xpt_toggle_tags(&newpath);
4257
4258                 if (async_code == AC_INQ_CHANGED) {
4259                         /*
4260                          * We've sent a start unit command, or
4261                          * something similar to a device that
4262                          * may have caused its inquiry data to
4263                          * change. So we re-scan the device to
4264                          * refresh the inquiry data for it.
4265                          */
4266                         xpt_scan_lun(newpath.periph, &newpath,
4267                                      CAM_EXPECT_INQ_CHANGE, NULL);
4268                 }
4269                 xpt_release_path(&newpath);
4270         } else if (async_code == AC_LOST_DEVICE) {
4271                 /*
4272                  * When we lose a device the device may be about to detach
4273                  * the sim, we have to clear out all pending timeouts and
4274                  * requests before that happens.  XXX it would be nice if
4275                  * we could abort the requests pertaining to the device.
4276                  */
4277                 xpt_release_devq_timeout(device);
4278                 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) {
4279                         device->flags |= CAM_DEV_UNCONFIGURED;
4280                         xpt_release_device(bus, target, device);
4281                 }
4282         } else if (async_code == AC_TRANSFER_NEG) {
4283                 struct ccb_trans_settings *settings;
4284
4285                 settings = (struct ccb_trans_settings *)async_arg;
4286                 xpt_set_transfer_settings(settings, device,
4287                                           /*async_update*/TRUE);
4288         }
4289 }
4290
4291 u_int32_t
4292 xpt_freeze_devq(struct cam_path *path, u_int count)
4293 {
4294         struct ccb_hdr *ccbh;
4295
4296         crit_enter();
4297         path->device->qfrozen_cnt += count;
4298
4299         /*
4300          * Mark the last CCB in the queue as needing
4301          * to be requeued if the driver hasn't
4302          * changed it's state yet.  This fixes a race
4303          * where a ccb is just about to be queued to
4304          * a controller driver when it's interrupt routine
4305          * freezes the queue.  To completly close the
4306          * hole, controller drives must check to see
4307          * if a ccb's status is still CAM_REQ_INPROG
4308          * under critical section protection just before they queue
4309          * the CCB.  See ahc_action/ahc_freeze_devq for
4310          * an example.
4311          */
4312         ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq);
4313         if (ccbh && ccbh->status == CAM_REQ_INPROG)
4314                 ccbh->status = CAM_REQUEUE_REQ;
4315         crit_exit();
4316         return (path->device->qfrozen_cnt);
4317 }
4318
4319 u_int32_t
4320 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4321 {
4322         if (sim->devq == NULL)
4323                 return(count);
4324         sim->devq->send_queue.qfrozen_cnt += count;
4325         if (sim->devq->active_dev != NULL) {
4326                 struct ccb_hdr *ccbh;
4327
4328                 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs,
4329                                   ccb_hdr_tailq);
4330                 if (ccbh && ccbh->status == CAM_REQ_INPROG)
4331                         ccbh->status = CAM_REQUEUE_REQ;
4332         }
4333         return (sim->devq->send_queue.qfrozen_cnt);
4334 }
4335
4336 /*
4337  * WARNING: most devices, especially USB/UMASS, may detach their sim early.
4338  * We ref-count the sim (and the bus only NULLs it out when the bus has been
4339  * freed, which is not the case here), but the device queue is also freed XXX
4340  * and we have to check that here.
4341  *
4342  * XXX fixme: could we simply not null-out the device queue via
4343  * cam_sim_free()?
4344  */
4345 static void
4346 xpt_release_devq_timeout(void *arg)
4347 {
4348         struct cam_ed *device;
4349
4350         device = (struct cam_ed *)arg;
4351
4352         xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE);
4353 }
4354
4355 void
4356 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4357 {
4358         xpt_release_devq_device(path->device, count, run_queue);
4359 }
4360
4361 static void
4362 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4363 {
4364         int     rundevq;
4365
4366         rundevq = 0;
4367         crit_enter();
4368
4369         if (dev->qfrozen_cnt > 0) {
4370
4371                 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count;
4372                 dev->qfrozen_cnt -= count;
4373                 if (dev->qfrozen_cnt == 0) {
4374
4375                         /*
4376                          * No longer need to wait for a successful
4377                          * command completion.
4378                          */
4379                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4380
4381                         /*
4382                          * Remove any timeouts that might be scheduled
4383                          * to release this queue.
4384                          */
4385                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4386                                 callout_stop(&dev->c_handle);
4387                                 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4388                         }
4389
4390                         /*
4391                          * Now that we are unfrozen schedule the
4392                          * device so any pending transactions are
4393                          * run.
4394                          */
4395                         if ((dev->ccbq.queue.entries > 0)
4396                          && (xpt_schedule_dev_sendq(dev->target->bus, dev))
4397                          && (run_queue != 0)) {
4398                                 rundevq = 1;
4399                         }
4400                 }
4401         }
4402         if (rundevq != 0)
4403                 xpt_run_dev_sendq(dev->target->bus);
4404         crit_exit();
4405 }
4406
4407 void
4408 xpt_release_simq(struct cam_sim *sim, int run_queue)
4409 {
4410         struct  camq *sendq;
4411
4412         if (sim->devq == NULL)
4413                 return;
4414
4415         sendq = &(sim->devq->send_queue);
4416         crit_enter();
4417
4418         if (sendq->qfrozen_cnt > 0) {
4419                 sendq->qfrozen_cnt--;
4420                 if (sendq->qfrozen_cnt == 0) {
4421                         struct cam_eb *bus;
4422
4423                         /*
4424                          * If there is a timeout scheduled to release this
4425                          * sim queue, remove it.  The queue frozen count is
4426                          * already at 0.
4427                          */
4428                         if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4429                                 callout_stop(&sim->c_handle);
4430                                 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4431                         }
4432                         bus = xpt_find_bus(sim->path_id);
4433                         crit_exit();
4434
4435                         if (run_queue) {
4436                                 /*
4437                                  * Now that we are unfrozen run the send queue.
4438                                  */
4439                                 xpt_run_dev_sendq(bus);
4440                         }
4441                         xpt_release_bus(bus);
4442                 } else {
4443                         crit_exit();
4444                 }
4445         } else {
4446                 crit_exit();
4447         }
4448 }
4449
4450 void
4451 xpt_done(union ccb *done_ccb)
4452 {
4453         crit_enter();
4454
4455         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4456         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) {
4457                 /*
4458                  * Queue up the request for handling by our SWI handler
4459                  * any of the "non-immediate" type of ccbs.
4460                  */
4461                 switch (done_ccb->ccb_h.path->periph->type) {
4462                 case CAM_PERIPH_BIO:
4463                         TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h,
4464                                           sim_links.tqe);
4465                         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4466                         setsoftcambio();
4467                         break;
4468                 case CAM_PERIPH_NET:
4469                         TAILQ_INSERT_TAIL(&cam_netq, &done_ccb->ccb_h,
4470                                           sim_links.tqe);
4471                         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4472                         setsoftcamnet();
4473                         break;
4474                 }
4475         }
4476         crit_exit();
4477 }
4478
4479 union ccb *
4480 xpt_alloc_ccb(void)
4481 {
4482         union ccb *new_ccb;
4483
4484         new_ccb = kmalloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT);
4485         return (new_ccb);
4486 }
4487
4488 void
4489 xpt_free_ccb(union ccb *free_ccb)
4490 {
4491         kfree(free_ccb, M_DEVBUF);
4492 }
4493
4494
4495
4496 /* Private XPT functions */
4497
4498 /*
4499  * Get a CAM control block for the caller. Charge the structure to the device
4500  * referenced by the path.  If the this device has no 'credits' then the
4501  * device already has the maximum number of outstanding operations under way
4502  * and we return NULL. If we don't have sufficient resources to allocate more
4503  * ccbs, we also return NULL.
4504  */
4505 static union ccb *
4506 xpt_get_ccb(struct cam_ed *device)
4507 {
4508         union ccb *new_ccb;
4509
4510         crit_enter();
4511         if ((new_ccb = (union ccb *)ccb_freeq.slh_first) == NULL) {
4512                 new_ccb = kmalloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT);
4513                 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h,
4514                                   xpt_links.sle);
4515                 xpt_ccb_count++;
4516         }
4517         cam_ccbq_take_opening(&device->ccbq);
4518         SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle);
4519         crit_exit();
4520         return (new_ccb);
4521 }
4522
4523 static void
4524 xpt_release_bus(struct cam_eb *bus)
4525 {
4526
4527         crit_enter();
4528         if (bus->refcount == 1) {
4529                 KKASSERT(TAILQ_FIRST(&bus->et_entries) == NULL);
4530                 TAILQ_REMOVE(&xpt_busses, bus, links);
4531                 if (bus->sim) {
4532                         cam_sim_release(bus->sim, 0);
4533                         bus->sim = NULL;
4534                 }
4535                 bus_generation++;
4536                 KKASSERT(bus->refcount == 1);
4537                 kfree(bus, M_DEVBUF);
4538         } else {
4539                 --bus->refcount;
4540         }
4541         crit_exit();
4542 }
4543
4544 static struct cam_et *
4545 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4546 {
4547         struct cam_et *target;
4548         struct cam_et *cur_target;
4549
4550         target = kmalloc(sizeof(*target), M_DEVBUF, M_INTWAIT);
4551
4552         TAILQ_INIT(&target->ed_entries);
4553         target->bus = bus;
4554         target->target_id = target_id;
4555         target->refcount = 1;
4556         target->generation = 0;
4557         timevalclear(&target->last_reset);
4558         /*
4559          * Hold a reference to our parent bus so it
4560          * will not go away before we do.
4561          */
4562         bus->refcount++;
4563
4564         /* Insertion sort into our bus's target list */
4565         cur_target = TAILQ_FIRST(&bus->et_entries);
4566         while (cur_target != NULL && cur_target->target_id < target_id)
4567                 cur_target = TAILQ_NEXT(cur_target, links);
4568
4569         if (cur_target != NULL) {
4570                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4571         } else {
4572                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4573         }
4574         bus->generation++;
4575         return (target);
4576 }
4577
4578 static void
4579 xpt_release_target(struct cam_eb *bus, struct cam_et *target)
4580 {
4581         crit_enter();
4582         if (target->refcount == 1) {
4583                 KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL);
4584                 TAILQ_REMOVE(&bus->et_entries, target, links);
4585                 bus->generation++;
4586                 xpt_release_bus(bus);
4587                 KKASSERT(target->refcount == 1);
4588                 kfree(target, M_DEVBUF);
4589         } else {
4590                 --target->refcount;
4591         }
4592         crit_exit();
4593 }
4594
4595 static struct cam_ed *
4596 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4597 {
4598         struct     cam_ed *device;
4599         struct     cam_devq *devq;
4600         cam_status status;
4601
4602         /* Make space for us in the device queue on our bus */
4603         if (bus->sim->devq == NULL)
4604                 return(NULL);
4605         devq = bus->sim->devq;
4606         status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1);
4607
4608         if (status != CAM_REQ_CMP) {
4609                 device = NULL;
4610         } else {
4611                 device = kmalloc(sizeof(*device), M_DEVBUF, M_INTWAIT);
4612         }
4613
4614         if (device != NULL) {
4615                 struct cam_ed *cur_device;
4616
4617                 cam_init_pinfo(&device->alloc_ccb_entry.pinfo);
4618                 device->alloc_ccb_entry.device = device;
4619                 cam_init_pinfo(&device->send_ccb_entry.pinfo);
4620                 device->send_ccb_entry.device = device;
4621                 device->target = target;
4622                 device->lun_id = lun_id;
4623                 /* Initialize our queues */
4624                 if (camq_init(&device->drvq, 0) != 0) {
4625                         kfree(device, M_DEVBUF);
4626                         return (NULL);
4627                 }
4628                 if (cam_ccbq_init(&device->ccbq,
4629                                   bus->sim->max_dev_openings) != 0) {
4630                         camq_fini(&device->drvq);
4631                         kfree(device, M_DEVBUF);
4632                         return (NULL);
4633                 }
4634                 SLIST_INIT(&device->asyncs);
4635                 SLIST_INIT(&device->periphs);
4636                 device->generation = 0;
4637                 device->owner = NULL;
4638                 /*
4639                  * Take the default quirk entry until we have inquiry
4640                  * data and can determine a better quirk to use.
4641                  */
4642                 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1];
4643                 bzero(&device->inq_data, sizeof(device->inq_data));
4644                 device->inq_flags = 0;
4645                 device->queue_flags = 0;
4646                 device->serial_num = NULL;
4647                 device->serial_num_len = 0;
4648                 device->qfrozen_cnt = 0;
4649                 device->flags = CAM_DEV_UNCONFIGURED;
4650                 device->tag_delay_count = 0;
4651                 device->refcount = 1;
4652                 callout_init(&device->c_handle);
4653
4654                 /*
4655                  * Hold a reference to our parent target so it
4656                  * will not go away before we do.
4657                  */
4658                 target->refcount++;
4659
4660                 /*
4661                  * XXX should be limited by number of CCBs this bus can
4662                  * do.
4663                  */
4664                 xpt_max_ccbs += device->ccbq.devq_openings;
4665                 /* Insertion sort into our target's device list */
4666                 cur_device = TAILQ_FIRST(&target->ed_entries);
4667                 while (cur_device != NULL && cur_device->lun_id < lun_id)
4668                         cur_device = TAILQ_NEXT(cur_device, links);
4669                 if (cur_device != NULL) {
4670                         TAILQ_INSERT_BEFORE(cur_device, device, links);
4671                 } else {
4672                         TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4673                 }
4674                 target->generation++;
4675         }
4676         return (device);
4677 }
4678
4679 static void
4680 xpt_reference_device(struct cam_ed *device)
4681 {
4682         ++device->refcount;
4683 }
4684
4685 static void
4686 xpt_release_device(struct cam_eb *bus, struct cam_et *target,
4687                    struct cam_ed *device)
4688 {
4689         struct cam_devq *devq;
4690
4691         crit_enter();
4692         if (device->refcount == 1) {
4693                 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED);
4694
4695                 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX
4696                  || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX)
4697                         panic("Removing device while still queued for ccbs");
4698
4699                 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4700                         device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4701                         callout_stop(&device->c_handle);
4702                 }
4703
4704                 TAILQ_REMOVE(&target->ed_entries, device,links);
4705                 target->generation++;
4706                 xpt_max_ccbs -= device->ccbq.devq_openings;
4707                 /* Release our slot in the devq */
4708                 devq = bus->sim->devq;
4709                 cam_devq_resize(devq, devq->alloc_queue.array_size - 1);
4710                 xpt_release_target(bus, target);
4711                 KKASSERT(device->refcount == 1);
4712                 kfree(device, M_DEVBUF);
4713         } else {
4714                 --device->refcount;
4715         }
4716         crit_exit();
4717 }
4718
4719 static u_int32_t
4720 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4721 {
4722         int     diff;
4723         int     result;
4724         struct  cam_ed *dev;
4725
4726         dev = path->device;
4727
4728         crit_enter();
4729
4730         diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings);
4731         result = cam_ccbq_resize(&dev->ccbq, newopenings);
4732         if (result == CAM_REQ_CMP && (diff < 0)) {
4733                 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED;
4734         }
4735         /* Adjust the global limit */
4736         xpt_max_ccbs += diff;
4737         crit_exit();
4738         return (result);
4739 }
4740
4741 static struct cam_eb *
4742 xpt_find_bus(path_id_t path_id)
4743 {
4744         struct cam_eb *bus;
4745
4746         for (bus = TAILQ_FIRST(&xpt_busses);
4747              bus != NULL;
4748              bus = TAILQ_NEXT(bus, links)) {
4749                 if (bus->path_id == path_id) {
4750                         bus->refcount++;
4751                         break;
4752                 }
4753         }
4754         return (bus);
4755 }
4756
4757 static struct cam_et *
4758 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4759 {
4760         struct cam_et *target;
4761
4762         for (target = TAILQ_FIRST(&bus->et_entries);
4763              target != NULL;
4764              target = TAILQ_NEXT(target, links)) {
4765                 if (target->target_id == target_id) {
4766                         target->refcount++;
4767                         break;
4768                 }
4769         }
4770         return (target);
4771 }
4772
4773 static struct cam_ed *
4774 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4775 {
4776         struct cam_ed *device;
4777
4778         for (device = TAILQ_FIRST(&target->ed_entries);
4779              device != NULL;
4780              device = TAILQ_NEXT(device, links)) {
4781                 if (device->lun_id == lun_id) {
4782                         device->refcount++;
4783                         break;
4784                 }
4785         }
4786         return (device);
4787 }
4788
4789 typedef struct {
4790         union   ccb *request_ccb;
4791         struct  ccb_pathinq *cpi;
4792         int     pending_count;
4793 } xpt_scan_bus_info;
4794
4795 /*
4796  * To start a scan, request_ccb is an XPT_SCAN_BUS ccb.
4797  * As the scan progresses, xpt_scan_bus is used as the
4798  * callback on completion function.
4799  */
4800 static void
4801 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb)
4802 {
4803         CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4804                   ("xpt_scan_bus\n"));
4805         switch (request_ccb->ccb_h.func_code) {
4806         case XPT_SCAN_BUS:
4807         {
4808                 xpt_scan_bus_info *scan_info;
4809                 union   ccb *work_ccb;
4810                 struct  cam_path *path;
4811                 u_int   i;
4812                 u_int   max_target;
4813                 u_int   initiator_id;
4814
4815                 /* Find out the characteristics of the bus */
4816                 work_ccb = xpt_alloc_ccb();
4817                 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path,
4818                               request_ccb->ccb_h.pinfo.priority);
4819                 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
4820                 xpt_action(work_ccb);
4821                 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
4822                         request_ccb->ccb_h.status = work_ccb->ccb_h.status;
4823                         xpt_free_ccb(work_ccb);
4824                         xpt_done(request_ccb);
4825                         return;
4826                 }
4827
4828                 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) {
4829                         /*
4830                          * Can't scan the bus on an adapter that
4831                          * cannot perform the initiator role.
4832                          */
4833                         request_ccb->ccb_h.status = CAM_REQ_CMP;
4834                         xpt_free_ccb(work_ccb);
4835                         xpt_done(request_ccb);
4836                         return;
4837                 }
4838
4839                 /* Save some state for use while we probe for devices */
4840                 scan_info = (xpt_scan_bus_info *)
4841                     kmalloc(sizeof(xpt_scan_bus_info), M_TEMP, M_INTWAIT);
4842                 scan_info->request_ccb = request_ccb;
4843                 scan_info->cpi = &work_ccb->cpi;
4844
4845                 /* Cache on our stack so we can work asynchronously */
4846                 max_target = scan_info->cpi->max_target;
4847                 initiator_id = scan_info->cpi->initiator_id;
4848
4849                 /*
4850                  * Don't count the initiator if the
4851                  * initiator is addressable.
4852                  */
4853                 scan_info->pending_count = max_target + 1;
4854                 if (initiator_id <= max_target)
4855                         scan_info->pending_count--;
4856
4857                 for (i = 0; i <= max_target; i++) {
4858                         cam_status status;
4859                         if (i == initiator_id)
4860                                 continue;
4861
4862                         status = xpt_create_path(&path, xpt_periph,
4863                                                  request_ccb->ccb_h.path_id,
4864                                                  i, 0);
4865                         if (status != CAM_REQ_CMP) {
4866                                 kprintf("xpt_scan_bus: xpt_create_path failed"
4867                                        " with status %#x, bus scan halted\n",
4868                                        status);
4869                                 break;
4870                         }
4871                         work_ccb = xpt_alloc_ccb();
4872                         xpt_setup_ccb(&work_ccb->ccb_h, path,
4873                                       request_ccb->ccb_h.pinfo.priority);
4874                         work_ccb->ccb_h.func_code = XPT_SCAN_LUN;
4875                         work_ccb->ccb_h.cbfcnp = xpt_scan_bus;
4876                         work_ccb->ccb_h.ppriv_ptr0 = scan_info;
4877                         work_ccb->crcn.flags = request_ccb->crcn.flags;
4878 #if 0
4879                         kprintf("xpt_scan_bus: probing %d:%d:%d\n",
4880                                 request_ccb->ccb_h.path_id, i, 0);
4881 #endif
4882                         xpt_action(work_ccb);
4883                 }
4884                 break;
4885         }
4886         case XPT_SCAN_LUN:
4887         {
4888                 xpt_scan_bus_info *scan_info;
4889                 path_id_t path_id;
4890                 target_id_t target_id;
4891                 lun_id_t lun_id;
4892
4893                 /* Reuse the same CCB to query if a device was really found */
4894                 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0;
4895                 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path,
4896                               request_ccb->ccb_h.pinfo.priority);
4897                 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
4898
4899                 path_id = request_ccb->ccb_h.path_id;
4900                 target_id = request_ccb->ccb_h.target_id;
4901                 lun_id = request_ccb->ccb_h.target_lun;
4902                 xpt_action(request_ccb);
4903
4904 #if 0
4905                 kprintf("xpt_scan_bus: got back probe from %d:%d:%d\n",
4906                         path_id, target_id, lun_id);
4907 #endif
4908
4909                 if (request_ccb->ccb_h.status != CAM_REQ_CMP) {
4910                         struct cam_ed *device;
4911                         struct cam_et *target;
4912                         int phl;
4913
4914                         /*
4915                          * If we already probed lun 0 successfully, or
4916                          * we have additional configured luns on this
4917                          * target that might have "gone away", go onto
4918                          * the next lun.
4919                          */
4920                         target = request_ccb->ccb_h.path->target;
4921                         /*
4922                          * We may touch devices that we don't
4923                          * hold references too, so ensure they
4924                          * don't disappear out from under us.
4925                          * The target above is referenced by the
4926                          * path in the request ccb.
4927                          */
4928                         phl = 0;
4929                         crit_enter();
4930                         device = TAILQ_FIRST(&target->ed_entries);
4931                         if (device != NULL) {
4932                                 phl = device->quirk->quirks & CAM_QUIRK_HILUNS;
4933                                 if (device->lun_id == 0)
4934                                         device = TAILQ_NEXT(device, links);
4935                         }
4936                         crit_exit();
4937                         if ((lun_id != 0) || (device != NULL)) {
4938                                 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl)
4939                                         lun_id++;
4940                         }
4941                 } else {
4942                         struct cam_ed *device;
4943
4944                         device = request_ccb->ccb_h.path->device;
4945
4946                         if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) {
4947                                 /* Try the next lun */
4948                                 if (lun_id < (CAM_SCSI2_MAXLUN-1) ||
4949                                     (device->quirk->quirks & CAM_QUIRK_HILUNS))
4950                                         lun_id++;
4951                         }
4952                 }
4953
4954                 xpt_free_path(request_ccb->ccb_h.path);
4955
4956                 /* Check Bounds */
4957                 if ((lun_id == request_ccb->ccb_h.target_lun)
4958                  || lun_id > scan_info->cpi->max_lun) {
4959                         /* We're done */
4960
4961                         xpt_free_ccb(request_ccb);
4962                         scan_info->pending_count--;
4963                         if (scan_info->pending_count == 0) {
4964                                 xpt_free_ccb((union ccb *)scan_info->cpi);
4965                                 request_ccb = scan_info->request_ccb;
4966                                 kfree(scan_info, M_TEMP);
4967                                 request_ccb->ccb_h.status = CAM_REQ_CMP;
4968                                 xpt_done(request_ccb);
4969                         }
4970                 } else {
4971                         /* Try the next device */
4972                         struct cam_path *path;
4973                         cam_status status;
4974
4975                         path = request_ccb->ccb_h.path;
4976                         status = xpt_create_path(&path, xpt_periph,
4977                                                  path_id, target_id, lun_id);
4978                         if (status != CAM_REQ_CMP) {
4979                                 kprintf("xpt_scan_bus: xpt_create_path failed "
4980                                        "with status %#x, halting LUN scan\n",
4981                                        status);
4982                                 xpt_free_ccb(request_ccb);
4983                                 scan_info->pending_count--;
4984                                 if (scan_info->pending_count == 0) {
4985                                         xpt_free_ccb(
4986                                                 (union ccb *)scan_info->cpi);
4987                                         request_ccb = scan_info->request_ccb;
4988                                         kfree(scan_info, M_TEMP);
4989                                         request_ccb->ccb_h.status = CAM_REQ_CMP;
4990                                         xpt_done(request_ccb);
4991                                         break;
4992                                 }
4993                         }
4994                         xpt_setup_ccb(&request_ccb->ccb_h, path,
4995                                       request_ccb->ccb_h.pinfo.priority);
4996                         request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
4997                         request_ccb->ccb_h.cbfcnp = xpt_scan_bus;
4998                         request_ccb->ccb_h.ppriv_ptr0 = scan_info;
4999                         request_ccb->crcn.flags =
5000                                 scan_info->request_ccb->crcn.flags;
5001 #if 0
5002                         xpt_print_path(path);
5003                         kprintf("xpt_scan bus probing\n");
5004 #endif
5005                         xpt_action(request_ccb);
5006                 }
5007                 break;
5008         }
5009         default:
5010                 break;
5011         }
5012 }
5013
5014 typedef enum {
5015         PROBE_TUR,
5016         PROBE_INQUIRY,
5017         PROBE_FULL_INQUIRY,
5018         PROBE_MODE_SENSE,
5019         PROBE_SERIAL_NUM,
5020         PROBE_TUR_FOR_NEGOTIATION
5021 } probe_action;
5022
5023 typedef enum {
5024         PROBE_INQUIRY_CKSUM     = 0x01,
5025         PROBE_SERIAL_CKSUM      = 0x02,
5026         PROBE_NO_ANNOUNCE       = 0x04
5027 } probe_flags;
5028
5029 typedef struct {
5030         TAILQ_HEAD(, ccb_hdr) request_ccbs;
5031         probe_action    action;
5032         union ccb       saved_ccb;
5033         probe_flags     flags;
5034         MD5_CTX         context;
5035         u_int8_t        digest[16];
5036 } probe_softc;
5037
5038 static void
5039 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path,
5040              cam_flags flags, union ccb *request_ccb)
5041 {
5042         struct ccb_pathinq cpi;
5043         cam_status status;
5044         struct cam_path *new_path;
5045         struct cam_periph *old_periph;
5046
5047         CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
5048                   ("xpt_scan_lun\n"));
5049
5050         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
5051         cpi.ccb_h.func_code = XPT_PATH_INQ;
5052         xpt_action((union ccb *)&cpi);
5053
5054         if (cpi.ccb_h.status != CAM_REQ_CMP) {
5055                 if (request_ccb != NULL) {
5056                         request_ccb->ccb_h.status = cpi.ccb_h.status;
5057                         xpt_done(request_ccb);
5058                 }
5059                 return;
5060         }
5061
5062         if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) {
5063                 /*
5064                  * Can't scan the bus on an adapter that
5065                  * cannot perform the initiator role.
5066                  */
5067                 if (request_ccb != NULL) {
5068                         request_ccb->ccb_h.status = CAM_REQ_CMP;
5069                         xpt_done(request_ccb);
5070                 }
5071                 return;
5072         }
5073
5074         if (request_ccb == NULL) {
5075                 request_ccb = kmalloc(sizeof(union ccb), M_TEMP, M_INTWAIT);
5076                 new_path = kmalloc(sizeof(*new_path), M_TEMP, M_INTWAIT);
5077                 status = xpt_compile_path(new_path, xpt_periph,
5078                                           path->bus->path_id,
5079                                           path->target->target_id,
5080                                           path->device->lun_id);
5081
5082                 if (status != CAM_REQ_CMP) {
5083                         xpt_print_path(path);
5084                         kprintf("xpt_scan_lun: can't compile path, can't "
5085                                "continue\n");
5086                         kfree(request_ccb, M_TEMP);
5087                         kfree(new_path, M_TEMP);
5088                         return;
5089                 }
5090                 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1);
5091                 request_ccb->ccb_h.cbfcnp = xptscandone;
5092                 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5093                 request_ccb->crcn.flags = flags;
5094         }
5095
5096         crit_enter();
5097         if ((old_periph = cam_periph_find(path, "probe")) != NULL) {
5098                 probe_softc *softc;
5099
5100                 softc = (probe_softc *)old_periph->softc;
5101                 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5102                                   periph_links.tqe);
5103         } else {
5104                 status = cam_periph_alloc(proberegister, NULL, probecleanup,
5105                                           probestart, "probe",
5106                                           CAM_PERIPH_BIO,
5107                                           request_ccb->ccb_h.path, NULL, 0,
5108                                           request_ccb);
5109
5110                 if (status != CAM_REQ_CMP) {
5111                         xpt_print_path(path);
5112                         kprintf("xpt_scan_lun: cam_alloc_periph returned an "
5113                                "error, can't continue probe\n");
5114                         request_ccb->ccb_h.status = status;
5115                         xpt_done(request_ccb);
5116                 }
5117         }
5118         crit_exit();
5119 }
5120
5121 static void
5122 xptscandone(struct cam_periph *periph, union ccb *done_ccb)
5123 {
5124         xpt_release_path(done_ccb->ccb_h.path);
5125         kfree(done_ccb->ccb_h.path, M_TEMP);
5126         kfree(done_ccb, M_TEMP);
5127 }
5128
5129 static cam_status
5130 proberegister(struct cam_periph *periph, void *arg)
5131 {
5132         union ccb *request_ccb; /* CCB representing the probe request */
5133         probe_softc *softc;
5134
5135         request_ccb = (union ccb *)arg;
5136         if (periph == NULL) {
5137                 kprintf("proberegister: periph was NULL!!\n");
5138                 return(CAM_REQ_CMP_ERR);
5139         }
5140
5141         if (request_ccb == NULL) {
5142                 kprintf("proberegister: no probe CCB, "
5143                        "can't register device\n");
5144                 return(CAM_REQ_CMP_ERR);
5145         }
5146
5147         softc = kmalloc(sizeof(*softc), M_TEMP, M_INTWAIT | M_ZERO);
5148         TAILQ_INIT(&softc->request_ccbs);
5149         TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5150                           periph_links.tqe);
5151         softc->flags = 0;
5152         periph->softc = softc;
5153         cam_periph_acquire(periph);
5154         /*
5155          * Ensure we've waited at least a bus settle
5156          * delay before attempting to probe the device.
5157          * For HBAs that don't do bus resets, this won't make a difference.
5158          */
5159         cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset,
5160                                       SCSI_DELAY);
5161         probeschedule(periph);
5162         return(CAM_REQ_CMP);
5163 }
5164
5165 static void
5166 probeschedule(struct cam_periph *periph)
5167 {
5168         struct ccb_pathinq cpi;
5169         union ccb *ccb;
5170         probe_softc *softc;
5171
5172         softc = (probe_softc *)periph->softc;
5173         ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
5174
5175         xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
5176         cpi.ccb_h.func_code = XPT_PATH_INQ;
5177         xpt_action((union ccb *)&cpi);
5178
5179         /*
5180          * If a device has gone away and another device, or the same one,
5181          * is back in the same place, it should have a unit attention
5182          * condition pending.  It will not report the unit attention in
5183          * response to an inquiry, which may leave invalid transfer
5184          * negotiations in effect.  The TUR will reveal the unit attention
5185          * condition.  Only send the TUR for lun 0, since some devices
5186          * will get confused by commands other than inquiry to non-existent
5187          * luns.  If you think a device has gone away start your scan from
5188          * lun 0.  This will insure that any bogus transfer settings are
5189          * invalidated.
5190          *
5191          * If we haven't seen the device before and the controller supports
5192          * some kind of transfer negotiation, negotiate with the first
5193          * sent command if no bus reset was performed at startup.  This
5194          * ensures that the device is not confused by transfer negotiation
5195          * settings left over by loader or BIOS action.
5196          */
5197         if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
5198          && (ccb->ccb_h.target_lun == 0)) {
5199                 softc->action = PROBE_TUR;
5200         } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0
5201               && (cpi.hba_misc & PIM_NOBUSRESET) != 0) {
5202                 proberequestdefaultnegotiation(periph);
5203                 softc->action = PROBE_INQUIRY;
5204         } else {
5205                 softc->action = PROBE_INQUIRY;
5206         }
5207
5208         if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE)
5209                 softc->flags |= PROBE_NO_ANNOUNCE;
5210         else
5211                 softc->flags &= ~PROBE_NO_ANNOUNCE;
5212
5213         xpt_schedule(periph, ccb->ccb_h.pinfo.priority);
5214 }
5215
5216 static void
5217 probestart(struct cam_periph *periph, union ccb *start_ccb)
5218 {
5219         /* Probe the device that our peripheral driver points to */
5220         struct ccb_scsiio *csio;
5221         probe_softc *softc;
5222
5223         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n"));
5224
5225         softc = (probe_softc *)periph->softc;
5226         csio = &start_ccb->csio;
5227
5228         switch (softc->action) {
5229         case PROBE_TUR:
5230         case PROBE_TUR_FOR_NEGOTIATION:
5231         {
5232                 scsi_test_unit_ready(csio,
5233                                      /*retries*/4,
5234                                      probedone,
5235                                      MSG_SIMPLE_Q_TAG,
5236                                      SSD_FULL_SIZE,
5237                                      /*timeout*/60000);
5238                 break;
5239         }
5240         case PROBE_INQUIRY:
5241         case PROBE_FULL_INQUIRY:
5242         {
5243                 u_int inquiry_len;
5244                 struct scsi_inquiry_data *inq_buf;
5245
5246                 inq_buf = &periph->path->device->inq_data;
5247                 /*
5248                  * If the device is currently configured, we calculate an
5249                  * MD5 checksum of the inquiry data, and if the serial number
5250                  * length is greater than 0, add the serial number data
5251                  * into the checksum as well.  Once the inquiry and the
5252                  * serial number check finish, we attempt to figure out
5253                  * whether we still have the same device.
5254                  */
5255                 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
5256
5257                         MD5Init(&softc->context);
5258                         MD5Update(&softc->context, (unsigned char *)inq_buf,
5259                                   sizeof(struct scsi_inquiry_data));
5260                         softc->flags |= PROBE_INQUIRY_CKSUM;
5261                         if (periph->path->device->serial_num_len > 0) {
5262                                 MD5Update(&softc->context,
5263                                           periph->path->device->serial_num,
5264                                           periph->path->device->serial_num_len);
5265                                 softc->flags |= PROBE_SERIAL_CKSUM;
5266                         }
5267                         MD5Final(softc->digest, &softc->context);
5268                 }
5269
5270                 if (softc->action == PROBE_INQUIRY)
5271                         inquiry_len = SHORT_INQUIRY_LENGTH;
5272                 else
5273                         inquiry_len = inq_buf->additional_length + 5;
5274
5275                 scsi_inquiry(csio,
5276                              /*retries*/4,
5277                              probedone,
5278                              MSG_SIMPLE_Q_TAG,
5279                              (u_int8_t *)inq_buf,
5280                              inquiry_len,
5281                              /*evpd*/FALSE,
5282                              /*page_code*/0,
5283                              SSD_MIN_SIZE,
5284                              /*timeout*/60 * 1000);
5285                 break;
5286         }
5287         case PROBE_MODE_SENSE:
5288         {
5289                 void  *mode_buf;
5290                 int    mode_buf_len;
5291
5292                 mode_buf_len = sizeof(struct scsi_mode_header_6)
5293                              + sizeof(struct scsi_mode_blk_desc)
5294                              + sizeof(struct scsi_control_page);
5295                 mode_buf = kmalloc(mode_buf_len, M_TEMP, M_INTWAIT);
5296                 scsi_mode_sense(csio,
5297                                 /*retries*/4,
5298                                 probedone,
5299                                 MSG_SIMPLE_Q_TAG,
5300                                 /*dbd*/FALSE,
5301                                 SMS_PAGE_CTRL_CURRENT,
5302                                 SMS_CONTROL_MODE_PAGE,
5303                                 mode_buf,
5304                                 mode_buf_len,
5305                                 SSD_FULL_SIZE,
5306                                 /*timeout*/60000);
5307                 break;
5308         }
5309         case PROBE_SERIAL_NUM:
5310         {
5311                 struct scsi_vpd_unit_serial_number *serial_buf;
5312                 struct cam_ed* device;
5313
5314                 serial_buf = NULL;
5315                 device = periph->path->device;
5316                 device->serial_num = NULL;
5317                 device->serial_num_len = 0;
5318
5319                 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) {
5320                         serial_buf = kmalloc(sizeof(*serial_buf), M_TEMP,
5321                                             M_INTWAIT | M_ZERO);
5322                         scsi_inquiry(csio,
5323                                      /*retries*/4,
5324                                      probedone,
5325                                      MSG_SIMPLE_Q_TAG,
5326                                      (u_int8_t *)serial_buf,
5327                                      sizeof(*serial_buf),
5328                                      /*evpd*/TRUE,
5329                                      SVPD_UNIT_SERIAL_NUMBER,
5330                                      SSD_MIN_SIZE,
5331                                      /*timeout*/60 * 1000);
5332                         break;
5333                 }
5334                 /*
5335                  * We'll have to do without, let our probedone
5336                  * routine finish up for us.
5337                  */
5338                 start_ccb->csio.data_ptr = NULL;
5339                 probedone(periph, start_ccb);
5340                 return;
5341         }
5342         }
5343         xpt_action(start_ccb);
5344 }
5345
5346 static void
5347 proberequestdefaultnegotiation(struct cam_periph *periph)
5348 {
5349         struct ccb_trans_settings cts;
5350
5351         xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1);
5352         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
5353         cts.flags = CCB_TRANS_USER_SETTINGS;
5354         xpt_action((union ccb *)&cts);
5355         cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
5356         cts.flags &= ~CCB_TRANS_USER_SETTINGS;
5357         cts.flags |= CCB_TRANS_CURRENT_SETTINGS;
5358         xpt_action((union ccb *)&cts);
5359 }
5360
5361 static void
5362 probedone(struct cam_periph *periph, union ccb *done_ccb)
5363 {
5364         probe_softc *softc;
5365         struct cam_path *path;
5366         u_int32_t  priority;
5367
5368         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n"));
5369
5370         softc = (probe_softc *)periph->softc;
5371         path = done_ccb->ccb_h.path;
5372         priority = done_ccb->ccb_h.pinfo.priority;
5373
5374         switch (softc->action) {
5375         case PROBE_TUR:
5376         {
5377                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
5378
5379                         if (cam_periph_error(done_ccb, 0,
5380                                              SF_NO_PRINT, NULL) == ERESTART)
5381                                 return;
5382                         else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
5383                                 /* Don't wedge the queue */
5384                                 xpt_release_devq(done_ccb->ccb_h.path,
5385                                                  /*count*/1,
5386                                                  /*run_queue*/TRUE);
5387                 }
5388                 softc->action = PROBE_INQUIRY;
5389                 xpt_release_ccb(done_ccb);
5390                 xpt_schedule(periph, priority);
5391                 return;
5392         }
5393         case PROBE_INQUIRY:
5394         case PROBE_FULL_INQUIRY:
5395         {
5396                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
5397                         struct scsi_inquiry_data *inq_buf;
5398                         u_int8_t periph_qual;
5399
5400                         path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID;
5401                         inq_buf = &path->device->inq_data;
5402
5403                         periph_qual = SID_QUAL(inq_buf);
5404
5405                         switch(periph_qual) {
5406                         case SID_QUAL_LU_CONNECTED:
5407                         {
5408                                 u_int8_t alen;
5409
5410                                 /*
5411                                  * We conservatively request only
5412                                  * SHORT_INQUIRY_LEN bytes of inquiry
5413                                  * information during our first try
5414                                  * at sending an INQUIRY. If the device
5415                                  * has more information to give,
5416                                  * perform a second request specifying
5417                                  * the amount of information the device
5418                                  * is willing to give.
5419                                  */
5420                                 alen = inq_buf->additional_length;
5421                                 if (softc->action == PROBE_INQUIRY
5422                                  && alen > (SHORT_INQUIRY_LENGTH - 5)) {
5423                                         softc->action = PROBE_FULL_INQUIRY;
5424                                         xpt_release_ccb(done_ccb);
5425                                         xpt_schedule(periph, priority);
5426                                         return;
5427                                 }
5428
5429                                 xpt_find_quirk(path->device);
5430
5431                                 if ((inq_buf->flags & SID_CmdQue) != 0)
5432                                         softc->action = PROBE_MODE_SENSE;
5433                                 else
5434                                         softc->action = PROBE_SERIAL_NUM;
5435
5436                                 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
5437                                 xpt_reference_device(path->device);
5438
5439                                 xpt_release_ccb(done_ccb);
5440                                 xpt_schedule(periph, priority);
5441                                 return;
5442                         }
5443                         default:
5444                                 break;
5445                         }
5446                 } else if (cam_periph_error(done_ccb, 0,
5447                                             done_ccb->ccb_h.target_lun > 0
5448                                             ? SF_RETRY_UA|SF_QUIET_IR
5449                                             : SF_RETRY_UA,
5450                                             &softc->saved_ccb) == ERESTART) {
5451                         return;
5452                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5453                         /* Don't wedge the queue */
5454                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
5455                                          /*run_queue*/TRUE);
5456                 }
5457                 /*
5458                  * If we get to this point, we got an error status back
5459                  * from the inquiry and the error status doesn't require
5460                  * automatically retrying the command.  Therefore, the
5461                  * inquiry failed.  If we had inquiry information before
5462                  * for this device, but this latest inquiry command failed,
5463                  * the device has probably gone away.  If this device isn't
5464                  * already marked unconfigured, notify the peripheral
5465                  * drivers that this device is no more.
5466                  */
5467                 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
5468                         /* Send the async notification. */
5469                         xpt_async(AC_LOST_DEVICE, path, NULL);
5470                 }
5471
5472                 xpt_release_ccb(done_ccb);
5473                 break;
5474         }
5475         case PROBE_MODE_SENSE:
5476         {
5477                 struct ccb_scsiio *csio;
5478                 struct scsi_mode_header_6 *mode_hdr;
5479
5480                 csio = &done_ccb->csio;
5481                 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr;
5482                 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
5483                         struct scsi_control_page *page;
5484                         u_int8_t *offset;
5485
5486                         offset = ((u_int8_t *)&mode_hdr[1])
5487                             + mode_hdr->blk_desc_len;
5488                         page = (struct scsi_control_page *)offset;
5489                         path->device->queue_flags = page->queue_flags;
5490                 } else if (cam_periph_error(done_ccb, 0,
5491                                             SF_RETRY_UA|SF_NO_PRINT,
5492                                             &softc->saved_ccb) == ERESTART) {
5493                         return;
5494                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5495                         /* Don't wedge the queue */
5496                         xpt_release_devq(done_ccb->ccb_h.path,
5497                                          /*count*/1, /*run_queue*/TRUE);
5498                 }
5499                 xpt_release_ccb(done_ccb);
5500                 kfree(mode_hdr, M_TEMP);
5501                 softc->action = PROBE_SERIAL_NUM;
5502                 xpt_schedule(periph, priority);
5503                 return;
5504         }
5505         case PROBE_SERIAL_NUM:
5506         {
5507                 struct ccb_scsiio *csio;
5508                 struct scsi_vpd_unit_serial_number *serial_buf;
5509                 u_int32_t  priority;
5510                 int changed;
5511                 int have_serialnum;
5512
5513                 changed = 1;
5514                 have_serialnum = 0;
5515                 csio = &done_ccb->csio;
5516                 priority = done_ccb->ccb_h.pinfo.priority;
5517                 serial_buf =
5518                     (struct scsi_vpd_unit_serial_number *)csio->data_ptr;
5519
5520                 /* Clean up from previous instance of this device */
5521                 if (path->device->serial_num != NULL) {
5522                         kfree(path->device->serial_num, M_DEVBUF);
5523                         path->device->serial_num = NULL;
5524                         path->device->serial_num_len = 0;
5525                 }
5526
5527                 if (serial_buf == NULL) {
5528                         /*
5529                          * Don't process the command as it was never sent
5530                          */
5531                 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
5532                         && (serial_buf->length > 0)) {
5533
5534                         have_serialnum = 1;
5535                         path->device->serial_num =
5536                                 kmalloc((serial_buf->length + 1),
5537                                        M_DEVBUF, M_INTWAIT);
5538                         bcopy(serial_buf->serial_num,
5539                               path->device->serial_num,
5540                               serial_buf->length);
5541                         path->device->serial_num_len = serial_buf->length;
5542                         path->device->serial_num[serial_buf->length] = '\0';
5543                 } else if (cam_periph_error(done_ccb, 0,
5544                                             SF_RETRY_UA|SF_NO_PRINT,
5545                                             &softc->saved_ccb) == ERESTART) {
5546                         return;
5547                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5548                         /* Don't wedge the queue */
5549                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
5550                                          /*run_queue*/TRUE);
5551                 }
5552
5553                 /*
5554                  * Let's see if we have seen this device before.
5555                  */
5556                 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) {
5557                         MD5_CTX context;
5558                         u_int8_t digest[16];
5559
5560                         MD5Init(&context);
5561
5562                         MD5Update(&context,
5563                                   (unsigned char *)&path->device->inq_data,
5564                                   sizeof(struct scsi_inquiry_data));
5565
5566                         if (have_serialnum)
5567                                 MD5Update(&context, serial_buf->serial_num,
5568                                           serial_buf->length);
5569
5570                         MD5Final(digest, &context);
5571                         if (bcmp(softc->digest, digest, 16) == 0)
5572                                 changed = 0;
5573
5574                         /*
5575                          * XXX Do we need to do a TUR in order to ensure
5576                          *     that the device really hasn't changed???
5577                          */
5578                         if ((changed != 0)
5579                          && ((softc->flags & PROBE_NO_ANNOUNCE) == 0))
5580                                 xpt_async(AC_LOST_DEVICE, path, NULL);
5581                 }
5582                 if (serial_buf != NULL)
5583                         kfree(serial_buf, M_TEMP);
5584
5585                 if (changed != 0) {
5586                         /*
5587                          * Now that we have all the necessary
5588                          * information to safely perform transfer
5589                          * negotiations... Controllers don't perform
5590                          * any negotiation or tagged queuing until
5591                          * after the first XPT_SET_TRAN_SETTINGS ccb is
5592                          * received.  So, on a new device, just retreive
5593                          * the user settings, and set them as the current
5594                          * settings to set the device up.
5595                          */
5596                         proberequestdefaultnegotiation(periph);
5597                         xpt_release_ccb(done_ccb);
5598
5599                         /*
5600                          * Perform a TUR to allow the controller to
5601                          * perform any necessary transfer negotiation.
5602                          */
5603                         softc->action = PROBE_TUR_FOR_NEGOTIATION;
5604                         xpt_schedule(periph, priority);
5605                         return;
5606                 }
5607                 xpt_release_ccb(done_ccb);
5608                 break;
5609         }
5610         case PROBE_TUR_FOR_NEGOTIATION:
5611                 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5612                         /* Don't wedge the queue */
5613                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
5614                                          /*run_queue*/TRUE);
5615                 }
5616
5617                 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
5618                 xpt_reference_device(path->device);
5619
5620                 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) {
5621                         /* Inform the XPT that a new device has been found */
5622                         done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
5623                         xpt_action(done_ccb);
5624
5625                         xpt_async(AC_FOUND_DEVICE, xpt_periph->path, done_ccb);
5626                 }
5627                 xpt_release_ccb(done_ccb);
5628                 break;
5629         }
5630         done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
5631         TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe);
5632         done_ccb->ccb_h.status = CAM_REQ_CMP;
5633         xpt_done(done_ccb);
5634         if (TAILQ_FIRST(&softc->request_ccbs) == NULL) {
5635                 cam_periph_invalidate(periph);
5636                 cam_periph_release(periph);
5637         } else {
5638                 probeschedule(periph);
5639         }
5640 }
5641
5642 static void
5643 probecleanup(struct cam_periph *periph)
5644 {
5645         kfree(periph->softc, M_TEMP);
5646 }
5647
5648 static void
5649 xpt_find_quirk(struct cam_ed *device)
5650 {
5651         caddr_t match;
5652
5653         match = cam_quirkmatch((caddr_t)&device->inq_data,
5654                                (caddr_t)xpt_quirk_table,
5655                                sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table),
5656                                sizeof(*xpt_quirk_table), scsi_inquiry_match);
5657
5658         if (match == NULL)
5659                 panic("xpt_find_quirk: device didn't match wildcard entry!!");
5660
5661         device->quirk = (struct xpt_quirk_entry *)match;
5662 }
5663
5664 static void
5665 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device,
5666                           int async_update)
5667 {
5668         struct  cam_sim *sim;
5669         int     qfrozen;
5670
5671         sim = cts->ccb_h.path->bus->sim;
5672         if (async_update == FALSE) {
5673                 struct  scsi_inquiry_data *inq_data;
5674                 struct  ccb_pathinq cpi;
5675                 struct  ccb_trans_settings cur_cts;
5676
5677                 if (device == NULL) {
5678                         cts->ccb_h.status = CAM_PATH_INVALID;
5679                         xpt_done((union ccb *)cts);
5680                         return;
5681                 }
5682
5683                 /*
5684                  * Perform sanity checking against what the
5685                  * controller and device can do.
5686                  */
5687                 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1);
5688                 cpi.ccb_h.func_code = XPT_PATH_INQ;
5689                 xpt_action((union ccb *)&cpi);
5690                 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1);
5691                 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
5692                 cur_cts.flags = CCB_TRANS_CURRENT_SETTINGS;
5693                 xpt_action((union ccb *)&cur_cts);
5694                 inq_data = &device->inq_data;
5695
5696                 /* Fill in any gaps in what the user gave us */
5697                 if ((cts->valid & CCB_TRANS_SYNC_RATE_VALID) == 0)
5698                         cts->sync_period = cur_cts.sync_period;
5699                 if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0)
5700                         cts->sync_offset = cur_cts.sync_offset;
5701                 if ((cts->valid & CCB_TRANS_BUS_WIDTH_VALID) == 0)
5702                         cts->bus_width = cur_cts.bus_width;
5703                 if ((cts->valid & CCB_TRANS_DISC_VALID) == 0) {
5704                         cts->flags &= ~CCB_TRANS_DISC_ENB;
5705                         cts->flags |= cur_cts.flags & CCB_TRANS_DISC_ENB;
5706                 }
5707                 if ((cts->valid & CCB_TRANS_TQ_VALID) == 0) {
5708                         cts->flags &= ~CCB_TRANS_TAG_ENB;
5709                         cts->flags |= cur_cts.flags & CCB_TRANS_TAG_ENB;
5710                 }
5711
5712                 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
5713                   && (inq_data->flags & SID_Sync) == 0)
5714                  || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)
5715                  || (cts->sync_offset == 0)
5716                  || (cts->sync_period == 0)) {
5717                         /* Force async */
5718                         cts->sync_period = 0;
5719                         cts->sync_offset = 0;
5720                 } else if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) {
5721
5722                         if ((inq_data->spi3data & SID_SPI_CLOCK_DT) == 0
5723                          && cts->sync_period <= 0x9) {
5724                                 /*
5725                                  * Don't allow DT transmission rates if the
5726                                  * device does not support it.
5727                                  */
5728                                 cts->sync_period = 0xa;
5729                         }
5730                         if ((inq_data->spi3data & SID_SPI_IUS) == 0
5731                          && cts->sync_period <= 0x8) {
5732                                 /*
5733                                  * Don't allow PACE transmission rates
5734                                  * if the device does support packetized
5735                                  * transfers.
5736                                  */
5737                                 cts->sync_period = 0x9;
5738                         }
5739                 }
5740
5741                 switch (cts->bus_width) {
5742                 case MSG_EXT_WDTR_BUS_32_BIT:
5743                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
5744                           || (inq_data->flags & SID_WBus32) != 0)
5745                          && (cpi.hba_inquiry & PI_WIDE_32) != 0)
5746                                 break;
5747                         /* Fall Through to 16-bit */
5748                 case MSG_EXT_WDTR_BUS_16_BIT:
5749                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
5750                           || (inq_data->flags & SID_WBus16) != 0)
5751                          && (cpi.hba_inquiry & PI_WIDE_16) != 0) {
5752                                 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
5753                                 break;
5754                         }
5755                         /* Fall Through to 8-bit */
5756                 default: /* New bus width?? */
5757                 case MSG_EXT_WDTR_BUS_8_BIT:
5758                         /* All targets can do this */
5759                         cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
5760                         break;
5761                 }
5762
5763                 if ((cts->flags & CCB_TRANS_DISC_ENB) == 0) {
5764                         /*
5765                          * Can't tag queue without disconnection.
5766                          */
5767                         cts->flags &= ~CCB_TRANS_TAG_ENB;
5768                         cts->valid |= CCB_TRANS_TQ_VALID;
5769                 }
5770
5771                 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0
5772                  || (inq_data->flags & SID_CmdQue) == 0
5773                  || (device->queue_flags & SCP_QUEUE_DQUE) != 0
5774                  || (device->quirk->mintags == 0)) {
5775                         /*
5776                          * Can't tag on hardware that doesn't support,
5777                          * doesn't have it enabled, or has broken tag support.
5778                          */
5779                         cts->flags &= ~CCB_TRANS_TAG_ENB;
5780                 }
5781         }
5782
5783         qfrozen = FALSE;
5784         if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) {
5785                 int device_tagenb;
5786
5787                 /*
5788                  * If we are transitioning from tags to no-tags or
5789                  * vice-versa, we need to carefully freeze and restart
5790                  * the queue so that we don't overlap tagged and non-tagged
5791                  * commands.  We also temporarily stop tags if there is
5792                  * a change in transfer negotiation settings to allow
5793                  * "tag-less" negotiation.
5794                  */
5795                 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5796                  || (device->inq_flags & SID_CmdQue) != 0)
5797                         device_tagenb = TRUE;
5798                 else
5799                         device_tagenb = FALSE;
5800
5801                 if (((cts->flags & CCB_TRANS_TAG_ENB) != 0
5802                   && device_tagenb == FALSE)
5803                  || ((cts->flags & CCB_TRANS_TAG_ENB) == 0
5804                   && device_tagenb == TRUE)) {
5805
5806                         if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) {
5807                                 /*
5808                                  * Delay change to use tags until after a
5809                                  * few commands have gone to this device so
5810                                  * the controller has time to perform transfer
5811                                  * negotiations without tagged messages getting
5812                                  * in the way.
5813                                  */
5814                                 device->tag_delay_count = CAM_TAG_DELAY_COUNT;
5815                                 device->flags |= CAM_DEV_TAG_AFTER_COUNT;
5816                         } else {
5817                                 xpt_freeze_devq(cts->ccb_h.path, /*count*/1);
5818                                 qfrozen = TRUE;
5819                                 device->inq_flags &= ~SID_CmdQue;
5820                                 xpt_dev_ccbq_resize(cts->ccb_h.path,
5821                                                     sim->max_dev_openings);
5822                                 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5823                                 device->tag_delay_count = 0;
5824                         }
5825                 }
5826         }
5827
5828         if (async_update == FALSE) {
5829                 /*
5830                  * If we are currently performing tagged transactions to
5831                  * this device and want to change its negotiation parameters,
5832                  * go non-tagged for a bit to give the controller a chance to
5833                  * negotiate unhampered by tag messages.
5834                  */
5835                 if ((device->inq_flags & SID_CmdQue) != 0
5836                  && (cts->flags & (CCB_TRANS_SYNC_RATE_VALID|
5837                                    CCB_TRANS_SYNC_OFFSET_VALID|
5838                                    CCB_TRANS_BUS_WIDTH_VALID)) != 0)
5839                         xpt_toggle_tags(cts->ccb_h.path);
5840
5841                 (*(sim->sim_action))(sim, (union ccb *)cts);
5842         }
5843
5844         if (qfrozen) {
5845                 struct ccb_relsim crs;
5846
5847                 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path,
5848                               /*priority*/1);
5849                 crs.ccb_h.func_code = XPT_REL_SIMQ;
5850                 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5851                 crs.openings
5852                     = crs.release_timeout
5853                     = crs.qfrozen_cnt
5854                     = 0;
5855                 xpt_action((union ccb *)&crs);
5856         }
5857 }
5858
5859 static void
5860 xpt_toggle_tags(struct cam_path *path)
5861 {
5862         struct cam_ed *dev;
5863
5864         /*
5865          * Give controllers a chance to renegotiate
5866          * before starting tag operations.  We
5867          * "toggle" tagged queuing off then on
5868          * which causes the tag enable command delay
5869          * counter to come into effect.
5870          */
5871         dev = path->device;
5872         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5873          || ((dev->inq_flags & SID_CmdQue) != 0
5874           && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) {
5875                 struct ccb_trans_settings cts;
5876
5877                 xpt_setup_ccb(&cts.ccb_h, path, 1);
5878                 cts.flags = 0;
5879                 cts.valid = CCB_TRANS_TQ_VALID;
5880                 xpt_set_transfer_settings(&cts, path->device,
5881                                           /*async_update*/TRUE);
5882                 cts.flags = CCB_TRANS_TAG_ENB;
5883                 xpt_set_transfer_settings(&cts, path->device,
5884                                           /*async_update*/TRUE);
5885         }
5886 }
5887
5888 static void
5889 xpt_start_tags(struct cam_path *path)
5890 {
5891         struct ccb_relsim crs;
5892         struct cam_ed *device;
5893         struct cam_sim *sim;
5894         int    newopenings;
5895
5896         device = path->device;
5897         sim = path->bus->sim;
5898         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5899         xpt_freeze_devq(path, /*count*/1);
5900         device->inq_flags |= SID_CmdQue;
5901         newopenings = min(device->quirk->maxtags, sim->max_tagged_dev_openings);
5902         xpt_dev_ccbq_resize(path, newopenings);
5903         xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1);
5904         crs.ccb_h.func_code = XPT_REL_SIMQ;
5905         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5906         crs.openings
5907             = crs.release_timeout
5908             = crs.qfrozen_cnt
5909             = 0;
5910         xpt_action((union ccb *)&crs);
5911 }
5912
5913 static int busses_to_config;
5914 static int busses_to_reset;
5915
5916 static int
5917 xptconfigbuscountfunc(struct cam_eb *bus, void *arg)
5918 {
5919         if (bus->path_id != CAM_XPT_PATH_ID) {
5920                 struct cam_path path;
5921                 struct ccb_pathinq cpi;
5922                 int can_negotiate;
5923
5924                 busses_to_config++;
5925                 xpt_compile_path(&path, NULL, bus->path_id,
5926                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5927                 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
5928                 cpi.ccb_h.func_code = XPT_PATH_INQ;
5929                 xpt_action((union ccb *)&cpi);
5930                 can_negotiate = cpi.hba_inquiry;
5931                 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
5932                 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0
5933                  && can_negotiate)
5934                         busses_to_reset++;
5935                 xpt_release_path(&path);
5936         }
5937
5938         return(1);
5939 }
5940
5941 static int
5942 xptconfigfunc(struct cam_eb *bus, void *arg)
5943 {
5944         struct  cam_path *path;
5945         union   ccb *work_ccb;
5946
5947         if (bus->path_id != CAM_XPT_PATH_ID) {
5948                 cam_status status;
5949                 int can_negotiate;
5950
5951                 work_ccb = xpt_alloc_ccb();
5952                 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id,
5953                                               CAM_TARGET_WILDCARD,
5954                                               CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){
5955                         kprintf("xptconfigfunc: xpt_create_path failed with "
5956                                "status %#x for bus %d\n", status, bus->path_id);
5957                         kprintf("xptconfigfunc: halting bus configuration\n");
5958                         xpt_free_ccb(work_ccb);
5959                         busses_to_config--;
5960                         xpt_finishconfig(xpt_periph, NULL);
5961                         return(0);
5962                 }
5963                 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
5964                 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
5965                 xpt_action(work_ccb);
5966                 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
5967                         kprintf("xptconfigfunc: CPI failed on bus %d "
5968                                "with status %d\n", bus->path_id,
5969                                work_ccb->ccb_h.status);
5970                         xpt_finishconfig(xpt_periph, work_ccb);
5971                         return(1);
5972                 }
5973
5974                 can_negotiate = work_ccb->cpi.hba_inquiry;
5975                 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
5976                 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0
5977                  && (can_negotiate != 0)) {
5978                         xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
5979                         work_ccb->ccb_h.func_code = XPT_RESET_BUS;
5980                         work_ccb->ccb_h.cbfcnp = NULL;
5981                         CAM_DEBUG(path, CAM_DEBUG_SUBTRACE,
5982                                   ("Resetting Bus\n"));
5983                         xpt_action(work_ccb);
5984                         xpt_finishconfig(xpt_periph, work_ccb);
5985                 } else {
5986                         /* Act as though we performed a successful BUS RESET */
5987                         work_ccb->ccb_h.func_code = XPT_RESET_BUS;
5988                         xpt_finishconfig(xpt_periph, work_ccb);
5989                 }
5990         }
5991
5992         return(1);
5993 }
5994
5995 static void
5996 xpt_config(void *arg)
5997 {
5998         /* Now that interrupts are enabled, go find our devices */
5999
6000 #ifdef CAMDEBUG
6001         /* Setup debugging flags and path */
6002 #ifdef CAM_DEBUG_FLAGS
6003         cam_dflags = CAM_DEBUG_FLAGS;
6004 #else /* !CAM_DEBUG_FLAGS */
6005         cam_dflags = CAM_DEBUG_NONE;
6006 #endif /* CAM_DEBUG_FLAGS */
6007 #ifdef CAM_DEBUG_BUS
6008         if (cam_dflags != CAM_DEBUG_NONE) {
6009                 if (xpt_create_path(&cam_dpath, xpt_periph,
6010                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
6011                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
6012                         kprintf("xpt_config: xpt_create_path() failed for debug"
6013                                " target %d:%d:%d, debugging disabled\n",
6014                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
6015                         cam_dflags = CAM_DEBUG_NONE;
6016                 }
6017         } else
6018                 cam_dpath = NULL;
6019 #else /* !CAM_DEBUG_BUS */
6020         cam_dpath = NULL;
6021 #endif /* CAM_DEBUG_BUS */
6022 #endif /* CAMDEBUG */
6023
6024         /*
6025          * Scan all installed busses.
6026          */
6027         xpt_for_all_busses(xptconfigbuscountfunc, NULL);
6028
6029         if (busses_to_config == 0) {
6030                 /* Call manually because we don't have any busses */
6031                 xpt_finishconfig(xpt_periph, NULL);
6032         } else  {
6033                 if (busses_to_reset > 0 && SCSI_DELAY >= 2000) {
6034                         kprintf("Waiting %d seconds for SCSI "
6035                                "devices to settle\n", SCSI_DELAY/1000);
6036                 }
6037                 xpt_for_all_busses(xptconfigfunc, NULL);
6038         }
6039 }
6040
6041 /*
6042  * If the given device only has one peripheral attached to it, and if that
6043  * peripheral is the passthrough driver, announce it.  This insures that the
6044  * user sees some sort of announcement for every peripheral in their system.
6045  */
6046 static int
6047 xptpassannouncefunc(struct cam_ed *device, void *arg)
6048 {
6049         struct cam_periph *periph;
6050         int i;
6051
6052         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
6053              periph = SLIST_NEXT(periph, periph_links), i++);
6054
6055         periph = SLIST_FIRST(&device->periphs);
6056         if ((i == 1)
6057          && (strncmp(periph->periph_name, "pass", 4) == 0))
6058                 xpt_announce_periph(periph, NULL);
6059
6060         return(1);
6061 }
6062
6063 static void
6064 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb)
6065 {
6066         struct  periph_driver **p_drv;
6067
6068         if (done_ccb != NULL) {
6069                 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
6070                           ("xpt_finishconfig\n"));
6071                 switch(done_ccb->ccb_h.func_code) {
6072                 case XPT_RESET_BUS:
6073                         if (done_ccb->ccb_h.status == CAM_REQ_CMP) {
6074                                 done_ccb->ccb_h.func_code = XPT_SCAN_BUS;
6075                                 done_ccb->ccb_h.cbfcnp = xpt_finishconfig;
6076                                 xpt_action(done_ccb);
6077                                 return;
6078                         }
6079                         /* FALLTHROUGH */
6080                 case XPT_SCAN_BUS:
6081                 default:
6082                         xpt_free_path(done_ccb->ccb_h.path);
6083                         busses_to_config--;
6084                         break;
6085                 }
6086         }
6087
6088         if (busses_to_config == 0) {
6089                 /* Register all the peripheral drivers */
6090                 /* XXX This will have to change when we have loadable modules */
6091                 SET_FOREACH(p_drv, periphdriver_set) {
6092                         (*p_drv)->init();
6093                 }
6094
6095                 /*
6096                  * Check for devices with no "standard" peripheral driver
6097                  * attached.  For any devices like that, announce the
6098                  * passthrough driver so the user will see something.
6099                  */
6100                 xpt_for_all_devices(xptpassannouncefunc, NULL);
6101
6102                 /* Release our hook so that the boot can continue. */
6103                 config_intrhook_disestablish(xpt_config_hook);
6104                 kfree(xpt_config_hook, M_TEMP);
6105                 xpt_config_hook = NULL;
6106         }
6107         if (done_ccb != NULL)
6108                 xpt_free_ccb(done_ccb);
6109 }
6110
6111 static void
6112 xptaction(struct cam_sim *sim, union ccb *work_ccb)
6113 {
6114         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
6115
6116         switch (work_ccb->ccb_h.func_code) {
6117         /* Common cases first */
6118         case XPT_PATH_INQ:              /* Path routing inquiry */
6119         {
6120                 struct ccb_pathinq *cpi;
6121
6122                 cpi = &work_ccb->cpi;
6123                 cpi->version_num = 1; /* XXX??? */
6124                 cpi->hba_inquiry = 0;
6125                 cpi->target_sprt = 0;
6126                 cpi->hba_misc = 0;
6127                 cpi->hba_eng_cnt = 0;
6128                 cpi->max_target = 0;
6129                 cpi->max_lun = 0;
6130                 cpi->initiator_id = 0;
6131                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
6132                 strncpy(cpi->hba_vid, "", HBA_IDLEN);
6133                 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
6134                 cpi->unit_number = sim->unit_number;
6135                 cpi->bus_id = sim->bus_id;
6136                 cpi->base_transfer_speed = 0;
6137                 cpi->ccb_h.status = CAM_REQ_CMP;
6138                 xpt_done(work_ccb);
6139                 break;
6140         }
6141         default:
6142                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
6143                 xpt_done(work_ccb);
6144                 break;
6145         }
6146 }
6147
6148 /*
6149  * The xpt as a "controller" has no interrupt sources, so polling
6150  * is a no-op.
6151  */
6152 static void
6153 xptpoll(struct cam_sim *sim)
6154 {
6155 }
6156
6157 /*
6158  * Should only be called by the machine interrupt dispatch routines,
6159  * so put these prototypes here instead of in the header.
6160  */
6161
6162 static void
6163 swi_camnet(void *arg, void *frame)
6164 {
6165         camisr(&cam_netq);
6166 }
6167
6168 static void
6169 swi_cambio(void *arg, void *frame)
6170 {
6171         camisr(&cam_bioq);
6172 }
6173
6174 static void
6175 camisr(cam_isrq_t *queue)
6176 {
6177         struct  ccb_hdr *ccb_h;
6178
6179         crit_enter();
6180         while ((ccb_h = TAILQ_FIRST(queue)) != NULL) {
6181                 int     runq;
6182
6183                 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe);
6184                 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
6185                 splz();
6186
6187                 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE,
6188                           ("camisr\n"));
6189
6190                 runq = FALSE;
6191
6192                 if (ccb_h->flags & CAM_HIGH_POWER) {
6193                         struct highpowerlist    *hphead;
6194                         struct cam_ed           *device;
6195                         union ccb               *send_ccb;
6196
6197                         hphead = &highpowerq;
6198
6199                         send_ccb = (union ccb *)STAILQ_FIRST(hphead);
6200
6201                         /*
6202                          * Increment the count since this command is done.
6203                          */
6204                         num_highpower++;
6205
6206                         /*
6207                          * Any high powered commands queued up?
6208                          */
6209                         if (send_ccb != NULL) {
6210                                 device = send_ccb->ccb_h.path->device;
6211
6212                                 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe);
6213
6214                                 xpt_release_devq(send_ccb->ccb_h.path,
6215                                                  /*count*/1, /*runqueue*/TRUE);
6216                         }
6217                 }
6218                 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
6219                         struct cam_ed *dev;
6220
6221                         dev = ccb_h->path->device;
6222
6223                         cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
6224
6225                         if (ccb_h->path->bus->sim->devq) {
6226                                 ccb_h->path->bus->sim->devq->send_active--;
6227                                 ccb_h->path->bus->sim->devq->send_openings++;
6228                         }
6229
6230                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
6231                          || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
6232                           && (dev->ccbq.dev_active == 0))) {
6233
6234                                 xpt_release_devq(ccb_h->path, /*count*/1,
6235                                                  /*run_queue*/TRUE);
6236                         }
6237
6238                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6239                          && (--dev->tag_delay_count == 0))
6240                                 xpt_start_tags(ccb_h->path);
6241
6242                         if ((dev->ccbq.queue.entries > 0)
6243                          && (dev->qfrozen_cnt == 0)
6244                          && (device_is_send_queued(dev) == 0)) {
6245                                 runq = xpt_schedule_dev_sendq(ccb_h->path->bus,
6246                                                               dev);
6247                         }
6248                 }
6249
6250                 if (ccb_h->status & CAM_RELEASE_SIMQ) {
6251                         xpt_release_simq(ccb_h->path->bus->sim,
6252                                          /*run_queue*/TRUE);
6253                         ccb_h->status &= ~CAM_RELEASE_SIMQ;
6254                         runq = FALSE;
6255                 }
6256
6257                 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
6258                  && (ccb_h->status & CAM_DEV_QFRZN)) {
6259                         xpt_release_devq(ccb_h->path, /*count*/1,
6260                                          /*run_queue*/TRUE);
6261                         ccb_h->status &= ~CAM_DEV_QFRZN;
6262                 } else if (runq) {
6263                         xpt_run_dev_sendq(ccb_h->path->bus);
6264                 }
6265
6266                 /* Call the peripheral driver's callback */
6267                 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
6268         }
6269         crit_exit();
6270 }