sys/cam/cam_xpt.c

   1 /*-
   2  * Implementation of the Common Access Method Transport (XPT) layer.
   3  *
   4  * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
   5  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions, and the following disclaimer,
  13  *    without modification, immediately at the beginning of the file.
  14  * 2. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  21  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include "opt_printf.h"
  31
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 #include <sys/param.h>
  36 #include <sys/bio.h>
  37 #include <sys/bus.h>
  38 #include <sys/systm.h>
  39 #include <sys/types.h>
  40 #include <sys/malloc.h>
  41 #include <sys/kernel.h>
  42 #include <sys/time.h>
  43 #include <sys/conf.h>
  44 #include <sys/fcntl.h>
  45 #include <sys/interrupt.h>
  46 #include <sys/proc.h>
  47 #include <sys/sbuf.h>
  48 #include <sys/smp.h>
  49 #include <sys/taskqueue.h>
  50
  51 #include <sys/lock.h>
  52 #include <sys/mutex.h>
  53 #include <sys/sysctl.h>
  54 #include <sys/kthread.h>
  55
  56 #include <cam/cam.h>
  57 #include <cam/cam_ccb.h>
  58 #include <cam/cam_iosched.h>
  59 #include <cam/cam_periph.h>
  60 #include <cam/cam_queue.h>
  61 #include <cam/cam_sim.h>
  62 #include <cam/cam_xpt.h>
  63 #include <cam/cam_xpt_sim.h>
  64 #include <cam/cam_xpt_periph.h>
  65 #include <cam/cam_xpt_internal.h>
  66 #include <cam/cam_debug.h>
  67 #include <cam/cam_compat.h>
  68
  69 #include <cam/scsi/scsi_all.h>
  70 #include <cam/scsi/scsi_message.h>
  71 #include <cam/scsi/scsi_pass.h>
  72
  73 #include <machine/md_var.h>     /* geometry translation */
  74 #include <machine/stdarg.h>     /* for xpt_print below */
  75
  76 #include "opt_cam.h"
  77
  78 /* Wild guess based on not wanting to grow the stack too much */
  79 #define XPT_PRINT_MAXLEN        512
  80 #ifdef PRINTF_BUFR_SIZE
  81 #define XPT_PRINT_LEN   PRINTF_BUFR_SIZE
  82 #else
  83 #define XPT_PRINT_LEN   128
  84 #endif
  85 _Static_assert(XPT_PRINT_LEN <= XPT_PRINT_MAXLEN, "XPT_PRINT_LEN is too large");
  86
  87 /*
  88  * This is the maximum number of high powered commands (e.g. start unit)
  89  * that can be outstanding at a particular time.
  90  */
  91 #ifndef CAM_MAX_HIGHPOWER
  92 #define CAM_MAX_HIGHPOWER  4
  93 #endif
  94
  95 /* Datastructures internal to the xpt layer */
  96 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
  97 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
  98 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
  99 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
 100
 101 /* Object for defering XPT actions to a taskqueue */
 102 struct xpt_task {
 103         struct task     task;
 104         void            *data1;
 105         uintptr_t       data2;
 106 };
 107
 108 struct xpt_softc {
 109         uint32_t                xpt_generation;
 110
 111         /* number of high powered commands that can go through right now */
 112         struct mtx              xpt_highpower_lock;
 113         STAILQ_HEAD(highpowerlist, cam_ed)      highpowerq;
 114         int                     num_highpower;
 115
 116         /* queue for handling async rescan requests. */
 117         TAILQ_HEAD(, ccb_hdr) ccb_scanq;
 118         int buses_to_config;
 119         int buses_config_done;
 120         int announce_nosbuf;
 121
 122         /*
 123          * Registered buses
 124          *
 125          * N.B., "busses" is an archaic spelling of "buses".  In new code
 126          * "buses" is preferred.
 127          */
 128         TAILQ_HEAD(,cam_eb)     xpt_busses;
 129         u_int                   bus_generation;
 130
 131         struct intr_config_hook *xpt_config_hook;
 132
 133         int                     boot_delay;
 134         struct callout          boot_callout;
 135
 136         struct mtx              xpt_topo_lock;
 137         struct mtx              xpt_lock;
 138         struct taskqueue        *xpt_taskq;
 139 };
 140
 141 typedef enum {
 142         DM_RET_COPY             = 0x01,
 143         DM_RET_FLAG_MASK        = 0x0f,
 144         DM_RET_NONE             = 0x00,
 145         DM_RET_STOP             = 0x10,
 146         DM_RET_DESCEND          = 0x20,
 147         DM_RET_ERROR            = 0x30,
 148         DM_RET_ACTION_MASK      = 0xf0
 149 } dev_match_ret;
 150
 151 typedef enum {
 152         XPT_DEPTH_BUS,
 153         XPT_DEPTH_TARGET,
 154         XPT_DEPTH_DEVICE,
 155         XPT_DEPTH_PERIPH
 156 } xpt_traverse_depth;
 157
 158 struct xpt_traverse_config {
 159         xpt_traverse_depth      depth;
 160         void                    *tr_func;
 161         void                    *tr_arg;
 162 };
 163
 164 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 165 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 166 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 167 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 168 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 169
 170 /* Transport layer configuration information */
 171 static struct xpt_softc xsoftc;
 172
 173 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
 174
 175 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
 176            &xsoftc.boot_delay, 0, "Bus registration wait time");
 177 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
 178             &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
 179 SYSCTL_INT(_kern_cam, OID_AUTO, announce_nosbuf, CTLFLAG_RWTUN,
 180             &xsoftc.announce_nosbuf, 0, "Don't use sbuf for announcements");
 181
 182 struct cam_doneq {
 183         struct mtx_padalign     cam_doneq_mtx;
 184         STAILQ_HEAD(, ccb_hdr)  cam_doneq;
 185         int                     cam_doneq_sleep;
 186 };
 187
 188 static struct cam_doneq cam_doneqs[MAXCPU];
 189 static int cam_num_doneqs;
 190 static struct proc *cam_proc;
 191
 192 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
 193            &cam_num_doneqs, 0, "Number of completion queues/threads");
 194
 195 struct cam_periph *xpt_periph;
 196
 197 static periph_init_t xpt_periph_init;
 198
 199 static struct periph_driver xpt_driver =
 200 {
 201         xpt_periph_init, "xpt",
 202         TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
 203         CAM_PERIPH_DRV_EARLY
 204 };
 205
 206 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 207
 208 static d_open_t xptopen;
 209 static d_close_t xptclose;
 210 static d_ioctl_t xptioctl;
 211 static d_ioctl_t xptdoioctl;
 212
 213 static struct cdevsw xpt_cdevsw = {
 214         .d_version =    D_VERSION,
 215         .d_flags =      0,
 216         .d_open =       xptopen,
 217         .d_close =      xptclose,
 218         .d_ioctl =      xptioctl,
 219         .d_name =       "xpt",
 220 };
 221
 222 /* Storage for debugging datastructures */
 223 struct cam_path *cam_dpath;
 224 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
 225 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN,
 226         &cam_dflags, 0, "Enabled debug flags");
 227 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
 228 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN,
 229         &cam_debug_delay, 0, "Delay in us after each debug message");
 230
 231 /* Our boot-time initialization hook */
 232 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 233
 234 static moduledata_t cam_moduledata = {
 235         "cam",
 236         cam_module_event_handler,
 237         NULL
 238 };
 239
 240 static int      xpt_init(void *);
 241
 242 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 243 MODULE_VERSION(cam, 1);
 244
 245
 246 static void             xpt_async_bcast(struct async_list *async_head,
 247                                         u_int32_t async_code,
 248                                         struct cam_path *path,
 249                                         void *async_arg);
 250 static path_id_t xptnextfreepathid(void);
 251 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 252 static union ccb *xpt_get_ccb(struct cam_periph *periph);
 253 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
 254 static void      xpt_run_allocq(struct cam_periph *periph, int sleep);
 255 static void      xpt_run_allocq_task(void *context, int pending);
 256 static void      xpt_run_devq(struct cam_devq *devq);
 257 static timeout_t xpt_release_devq_timeout;
 258 static void      xpt_release_simq_timeout(void *arg) __unused;
 259 static void      xpt_acquire_bus(struct cam_eb *bus);
 260 static void      xpt_release_bus(struct cam_eb *bus);
 261 static uint32_t  xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
 262 static int       xpt_release_devq_device(struct cam_ed *dev, u_int count,
 263                     int run_queue);
 264 static struct cam_et*
 265                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 266 static void      xpt_acquire_target(struct cam_et *target);
 267 static void      xpt_release_target(struct cam_et *target);
 268 static struct cam_eb*
 269                  xpt_find_bus(path_id_t path_id);
 270 static struct cam_et*
 271                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 272 static struct cam_ed*
 273                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 274 static void      xpt_config(void *arg);
 275 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 276                                  u_int32_t new_priority);
 277 static xpt_devicefunc_t xptpassannouncefunc;
 278 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 279 static void      xptpoll(struct cam_sim *sim);
 280 static void      camisr_runqueue(void);
 281 static void      xpt_done_process(struct ccb_hdr *ccb_h);
 282 static void      xpt_done_td(void *);
 283 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 284                                     u_int num_patterns, struct cam_eb *bus);
 285 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 286                                        u_int num_patterns,
 287                                        struct cam_ed *device);
 288 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 289                                        u_int num_patterns,
 290                                        struct cam_periph *periph);
 291 static xpt_busfunc_t    xptedtbusfunc;
 292 static xpt_targetfunc_t xptedttargetfunc;
 293 static xpt_devicefunc_t xptedtdevicefunc;
 294 static xpt_periphfunc_t xptedtperiphfunc;
 295 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 296 static xpt_periphfunc_t xptplistperiphfunc;
 297 static int              xptedtmatch(struct ccb_dev_match *cdm);
 298 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 299 static int              xptbustraverse(struct cam_eb *start_bus,
 300                                        xpt_busfunc_t *tr_func, void *arg);
 301 static int              xpttargettraverse(struct cam_eb *bus,
 302                                           struct cam_et *start_target,
 303                                           xpt_targetfunc_t *tr_func, void *arg);
 304 static int              xptdevicetraverse(struct cam_et *target,
 305                                           struct cam_ed *start_device,
 306                                           xpt_devicefunc_t *tr_func, void *arg);
 307 static int              xptperiphtraverse(struct cam_ed *device,
 308                                           struct cam_periph *start_periph,
 309                                           xpt_periphfunc_t *tr_func, void *arg);
 310 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 311                                         xpt_pdrvfunc_t *tr_func, void *arg);
 312 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 313                                             struct cam_periph *start_periph,
 314                                             xpt_periphfunc_t *tr_func,
 315                                             void *arg);
 316 static xpt_busfunc_t    xptdefbusfunc;
 317 static xpt_targetfunc_t xptdeftargetfunc;
 318 static xpt_devicefunc_t xptdefdevicefunc;
 319 static xpt_periphfunc_t xptdefperiphfunc;
 320 static void             xpt_finishconfig_task(void *context, int pending);
 321 static void             xpt_dev_async_default(u_int32_t async_code,
 322                                               struct cam_eb *bus,
 323                                               struct cam_et *target,
 324                                               struct cam_ed *device,
 325                                               void *async_arg);
 326 static struct cam_ed *  xpt_alloc_device_default(struct cam_eb *bus,
 327                                                  struct cam_et *target,
 328                                                  lun_id_t lun_id);
 329 static xpt_devicefunc_t xptsetasyncfunc;
 330 static xpt_busfunc_t    xptsetasyncbusfunc;
 331 static cam_status       xptregister(struct cam_periph *periph,
 332                                     void *arg);
 333 static __inline int device_is_queued(struct cam_ed *device);
 334
 335 static __inline int
 336 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 337 {
 338         int     retval;
 339
 340         mtx_assert(&devq->send_mtx, MA_OWNED);
 341         if ((dev->ccbq.queue.entries > 0) &&
 342             (dev->ccbq.dev_openings > 0) &&
 343             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 344                 /*
 345                  * The priority of a device waiting for controller
 346                  * resources is that of the highest priority CCB
 347                  * enqueued.
 348                  */
 349                 retval =
 350                     xpt_schedule_dev(&devq->send_queue,
 351                                      &dev->devq_entry,
 352                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 353         } else {
 354                 retval = 0;
 355         }
 356         return (retval);
 357 }
 358
 359 static __inline int
 360 device_is_queued(struct cam_ed *device)
 361 {
 362         return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
 363 }
 364
 365 static void
 366 xpt_periph_init()
 367 {
 368         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 369 }
 370
 371 static int
 372 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 373 {
 374
 375         /*
 376          * Only allow read-write access.
 377          */
 378         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 379                 return(EPERM);
 380
 381         /*
 382          * We don't allow nonblocking access.
 383          */
 384         if ((flags & O_NONBLOCK) != 0) {
 385                 printf("%s: can't do nonblocking access\n", devtoname(dev));
 386                 return(ENODEV);
 387         }
 388
 389         return(0);
 390 }
 391
 392 static int
 393 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 394 {
 395
 396         return(0);
 397 }
 398
 399 /*
 400  * Don't automatically grab the xpt softc lock here even though this is going
 401  * through the xpt device.  The xpt device is really just a back door for
 402  * accessing other devices and SIMs, so the right thing to do is to grab
 403  * the appropriate SIM lock once the bus/SIM is located.
 404  */
 405 static int
 406 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 407 {
 408         int error;
 409
 410         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 411                 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
 412         }
 413         return (error);
 414 }
 415
 416 static int
 417 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 418 {
 419         int error;
 420
 421         error = 0;
 422
 423         switch(cmd) {
 424         /*
 425          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 426          * to accept CCB types that don't quite make sense to send through a
 427          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 428          * in the CAM spec.
 429          */
 430         case CAMIOCOMMAND: {
 431                 union ccb *ccb;
 432                 union ccb *inccb;
 433                 struct cam_eb *bus;
 434
 435                 inccb = (union ccb *)addr;
 436 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 437                 if (inccb->ccb_h.func_code == XPT_SCSI_IO)
 438                         inccb->csio.bio = NULL;
 439 #endif
 440
 441                 if (inccb->ccb_h.flags & CAM_UNLOCKED)
 442                         return (EINVAL);
 443
 444                 bus = xpt_find_bus(inccb->ccb_h.path_id);
 445                 if (bus == NULL)
 446                         return (EINVAL);
 447
 448                 switch (inccb->ccb_h.func_code) {
 449                 case XPT_SCAN_BUS:
 450                 case XPT_RESET_BUS:
 451                         if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
 452                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 453                                 xpt_release_bus(bus);
 454                                 return (EINVAL);
 455                         }
 456                         break;
 457                 case XPT_SCAN_TGT:
 458                         if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
 459                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 460                                 xpt_release_bus(bus);
 461                                 return (EINVAL);
 462                         }
 463                         break;
 464                 default:
 465                         break;
 466                 }
 467
 468                 switch(inccb->ccb_h.func_code) {
 469                 case XPT_SCAN_BUS:
 470                 case XPT_RESET_BUS:
 471                 case XPT_PATH_INQ:
 472                 case XPT_ENG_INQ:
 473                 case XPT_SCAN_LUN:
 474                 case XPT_SCAN_TGT:
 475
 476                         ccb = xpt_alloc_ccb();
 477
 478                         /*
 479                          * Create a path using the bus, target, and lun the
 480                          * user passed in.
 481                          */
 482                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 483                                             inccb->ccb_h.path_id,
 484                                             inccb->ccb_h.target_id,
 485                                             inccb->ccb_h.target_lun) !=
 486                                             CAM_REQ_CMP){
 487                                 error = EINVAL;
 488                                 xpt_free_ccb(ccb);
 489                                 break;
 490                         }
 491                         /* Ensure all of our fields are correct */
 492                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 493                                       inccb->ccb_h.pinfo.priority);
 494                         xpt_merge_ccb(ccb, inccb);
 495                         xpt_path_lock(ccb->ccb_h.path);
 496                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 497                         xpt_path_unlock(ccb->ccb_h.path);
 498                         bcopy(ccb, inccb, sizeof(union ccb));
 499                         xpt_free_path(ccb->ccb_h.path);
 500                         xpt_free_ccb(ccb);
 501                         break;
 502
 503                 case XPT_DEBUG: {
 504                         union ccb ccb;
 505
 506                         /*
 507                          * This is an immediate CCB, so it's okay to
 508                          * allocate it on the stack.
 509                          */
 510
 511                         /*
 512                          * Create a path using the bus, target, and lun the
 513                          * user passed in.
 514                          */
 515                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 516                                             inccb->ccb_h.path_id,
 517                                             inccb->ccb_h.target_id,
 518                                             inccb->ccb_h.target_lun) !=
 519                                             CAM_REQ_CMP){
 520                                 error = EINVAL;
 521                                 break;
 522                         }
 523                         /* Ensure all of our fields are correct */
 524                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 525                                       inccb->ccb_h.pinfo.priority);
 526                         xpt_merge_ccb(&ccb, inccb);
 527                         xpt_action(&ccb);
 528                         bcopy(&ccb, inccb, sizeof(union ccb));
 529                         xpt_free_path(ccb.ccb_h.path);
 530                         break;
 531
 532                 }
 533                 case XPT_DEV_MATCH: {
 534                         struct cam_periph_map_info mapinfo;
 535                         struct cam_path *old_path;
 536
 537                         /*
 538                          * We can't deal with physical addresses for this
 539                          * type of transaction.
 540                          */
 541                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 542                             CAM_DATA_VADDR) {
 543                                 error = EINVAL;
 544                                 break;
 545                         }
 546
 547                         /*
 548                          * Save this in case the caller had it set to
 549                          * something in particular.
 550                          */
 551                         old_path = inccb->ccb_h.path;
 552
 553                         /*
 554                          * We really don't need a path for the matching
 555                          * code.  The path is needed because of the
 556                          * debugging statements in xpt_action().  They
 557                          * assume that the CCB has a valid path.
 558                          */
 559                         inccb->ccb_h.path = xpt_periph->path;
 560
 561                         bzero(&mapinfo, sizeof(mapinfo));
 562
 563                         /*
 564                          * Map the pattern and match buffers into kernel
 565                          * virtual address space.
 566                          */
 567                         error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS);
 568
 569                         if (error) {
 570                                 inccb->ccb_h.path = old_path;
 571                                 break;
 572                         }
 573
 574                         /*
 575                          * This is an immediate CCB, we can send it on directly.
 576                          */
 577                         xpt_action(inccb);
 578
 579                         /*
 580                          * Map the buffers back into user space.
 581                          */
 582                         cam_periph_unmapmem(inccb, &mapinfo);
 583
 584                         inccb->ccb_h.path = old_path;
 585
 586                         error = 0;
 587                         break;
 588                 }
 589                 default:
 590                         error = ENOTSUP;
 591                         break;
 592                 }
 593                 xpt_release_bus(bus);
 594                 break;
 595         }
 596         /*
 597          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 598          * with the periphal driver name and unit name filled in.  The other
 599          * fields don't really matter as input.  The passthrough driver name
 600          * ("pass"), and unit number are passed back in the ccb.  The current
 601          * device generation number, and the index into the device peripheral
 602          * driver list, and the status are also passed back.  Note that
 603          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 604          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 605          * (or rather should be) impossible for the device peripheral driver
 606          * list to change since we look at the whole thing in one pass, and
 607          * we do it with lock protection.
 608          *
 609          */
 610         case CAMGETPASSTHRU: {
 611                 union ccb *ccb;
 612                 struct cam_periph *periph;
 613                 struct periph_driver **p_drv;
 614                 char   *name;
 615                 u_int unit;
 616                 int base_periph_found;
 617
 618                 ccb = (union ccb *)addr;
 619                 unit = ccb->cgdl.unit_number;
 620                 name = ccb->cgdl.periph_name;
 621                 base_periph_found = 0;
 622 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 623                 if (ccb->ccb_h.func_code == XPT_SCSI_IO)
 624                         ccb->csio.bio = NULL;
 625 #endif
 626
 627                 /*
 628                  * Sanity check -- make sure we don't get a null peripheral
 629                  * driver name.
 630                  */
 631                 if (*ccb->cgdl.periph_name == '\0') {
 632                         error = EINVAL;
 633                         break;
 634                 }
 635
 636                 /* Keep the list from changing while we traverse it */
 637                 xpt_lock_buses();
 638
 639                 /* first find our driver in the list of drivers */
 640                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 641                         if (strcmp((*p_drv)->driver_name, name) == 0)
 642                                 break;
 643
 644                 if (*p_drv == NULL) {
 645                         xpt_unlock_buses();
 646                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 647                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 648                         *ccb->cgdl.periph_name = '\0';
 649                         ccb->cgdl.unit_number = 0;
 650                         error = ENOENT;
 651                         break;
 652                 }
 653
 654                 /*
 655                  * Run through every peripheral instance of this driver
 656                  * and check to see whether it matches the unit passed
 657                  * in by the user.  If it does, get out of the loops and
 658                  * find the passthrough driver associated with that
 659                  * peripheral driver.
 660                  */
 661                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 662                      periph = TAILQ_NEXT(periph, unit_links)) {
 663
 664                         if (periph->unit_number == unit)
 665                                 break;
 666                 }
 667                 /*
 668                  * If we found the peripheral driver that the user passed
 669                  * in, go through all of the peripheral drivers for that
 670                  * particular device and look for a passthrough driver.
 671                  */
 672                 if (periph != NULL) {
 673                         struct cam_ed *device;
 674                         int i;
 675
 676                         base_periph_found = 1;
 677                         device = periph->path->device;
 678                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 679                              periph != NULL;
 680                              periph = SLIST_NEXT(periph, periph_links), i++) {
 681                                 /*
 682                                  * Check to see whether we have a
 683                                  * passthrough device or not.
 684                                  */
 685                                 if (strcmp(periph->periph_name, "pass") == 0) {
 686                                         /*
 687                                          * Fill in the getdevlist fields.
 688                                          */
 689                                         strcpy(ccb->cgdl.periph_name,
 690                                                periph->periph_name);
 691                                         ccb->cgdl.unit_number =
 692                                                 periph->unit_number;
 693                                         if (SLIST_NEXT(periph, periph_links))
 694                                                 ccb->cgdl.status =
 695                                                         CAM_GDEVLIST_MORE_DEVS;
 696                                         else
 697                                                 ccb->cgdl.status =
 698                                                        CAM_GDEVLIST_LAST_DEVICE;
 699                                         ccb->cgdl.generation =
 700                                                 device->generation;
 701                                         ccb->cgdl.index = i;
 702                                         /*
 703                                          * Fill in some CCB header fields
 704                                          * that the user may want.
 705                                          */
 706                                         ccb->ccb_h.path_id =
 707                                                 periph->path->bus->path_id;
 708                                         ccb->ccb_h.target_id =
 709                                                 periph->path->target->target_id;
 710                                         ccb->ccb_h.target_lun =
 711                                                 periph->path->device->lun_id;
 712                                         ccb->ccb_h.status = CAM_REQ_CMP;
 713                                         break;
 714                                 }
 715                         }
 716                 }
 717
 718                 /*
 719                  * If the periph is null here, one of two things has
 720                  * happened.  The first possibility is that we couldn't
 721                  * find the unit number of the particular peripheral driver
 722                  * that the user is asking about.  e.g. the user asks for
 723                  * the passthrough driver for "da11".  We find the list of
 724                  * "da" peripherals all right, but there is no unit 11.
 725                  * The other possibility is that we went through the list
 726                  * of peripheral drivers attached to the device structure,
 727                  * but didn't find one with the name "pass".  Either way,
 728                  * we return ENOENT, since we couldn't find something.
 729                  */
 730                 if (periph == NULL) {
 731                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 732                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 733                         *ccb->cgdl.periph_name = '\0';
 734                         ccb->cgdl.unit_number = 0;
 735                         error = ENOENT;
 736                         /*
 737                          * It is unfortunate that this is even necessary,
 738                          * but there are many, many clueless users out there.
 739                          * If this is true, the user is looking for the
 740                          * passthrough driver, but doesn't have one in his
 741                          * kernel.
 742                          */
 743                         if (base_periph_found == 1) {
 744                                 printf("xptioctl: pass driver is not in the "
 745                                        "kernel\n");
 746                                 printf("xptioctl: put \"device pass\" in "
 747                                        "your kernel config file\n");
 748                         }
 749                 }
 750                 xpt_unlock_buses();
 751                 break;
 752                 }
 753         default:
 754                 error = ENOTTY;
 755                 break;
 756         }
 757
 758         return(error);
 759 }
 760
 761 static int
 762 cam_module_event_handler(module_t mod, int what, void *arg)
 763 {
 764         int error;
 765
 766         switch (what) {
 767         case MOD_LOAD:
 768                 if ((error = xpt_init(NULL)) != 0)
 769                         return (error);
 770                 break;
 771         case MOD_UNLOAD:
 772                 return EBUSY;
 773         default:
 774                 return EOPNOTSUPP;
 775         }
 776
 777         return 0;
 778 }
 779
 780 static struct xpt_proto *
 781 xpt_proto_find(cam_proto proto)
 782 {
 783         struct xpt_proto **pp;
 784
 785         SET_FOREACH(pp, cam_xpt_proto_set) {
 786                 if ((*pp)->proto == proto)
 787                         return *pp;
 788         }
 789
 790         return NULL;
 791 }
 792
 793 static void
 794 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 795 {
 796
 797         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 798                 xpt_free_path(done_ccb->ccb_h.path);
 799                 xpt_free_ccb(done_ccb);
 800         } else {
 801                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 802                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 803         }
 804         xpt_release_boot();
 805 }
 806
 807 /* thread to handle bus rescans */
 808 static void
 809 xpt_scanner_thread(void *dummy)
 810 {
 811         union ccb       *ccb;
 812         struct cam_path  path;
 813
 814         xpt_lock_buses();
 815         for (;;) {
 816                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 817                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 818                                "-", 0);
 819                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 820                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 821                         xpt_unlock_buses();
 822
 823                         /*
 824                          * Since lock can be dropped inside and path freed
 825                          * by completion callback even before return here,
 826                          * take our own path copy for reference.
 827                          */
 828                         xpt_copy_path(&path, ccb->ccb_h.path);
 829                         xpt_path_lock(&path);
 830                         xpt_action(ccb);
 831                         xpt_path_unlock(&path);
 832                         xpt_release_path(&path);
 833
 834                         xpt_lock_buses();
 835                 }
 836         }
 837 }
 838
 839 void
 840 xpt_rescan(union ccb *ccb)
 841 {
 842         struct ccb_hdr *hdr;
 843
 844         /* Prepare request */
 845         if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
 846             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 847                 ccb->ccb_h.func_code = XPT_SCAN_BUS;
 848         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 849             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 850                 ccb->ccb_h.func_code = XPT_SCAN_TGT;
 851         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 852             ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
 853                 ccb->ccb_h.func_code = XPT_SCAN_LUN;
 854         else {
 855                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 856                 xpt_free_path(ccb->ccb_h.path);
 857                 xpt_free_ccb(ccb);
 858                 return;
 859         }
 860         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
 861             ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code,
 862                 xpt_action_name(ccb->ccb_h.func_code)));
 863
 864         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 865         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 866         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 867         /* Don't make duplicate entries for the same paths. */
 868         xpt_lock_buses();
 869         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 870                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 871                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 872                                 wakeup(&xsoftc.ccb_scanq);
 873                                 xpt_unlock_buses();
 874                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 875                                 xpt_free_path(ccb->ccb_h.path);
 876                                 xpt_free_ccb(ccb);
 877                                 return;
 878                         }
 879                 }
 880         }
 881         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 882         xsoftc.buses_to_config++;
 883         wakeup(&xsoftc.ccb_scanq);
 884         xpt_unlock_buses();
 885 }
 886
 887 /* Functions accessed by the peripheral drivers */
 888 static int
 889 xpt_init(void *dummy)
 890 {
 891         struct cam_sim *xpt_sim;
 892         struct cam_path *path;
 893         struct cam_devq *devq;
 894         cam_status status;
 895         int error, i;
 896
 897         TAILQ_INIT(&xsoftc.xpt_busses);
 898         TAILQ_INIT(&xsoftc.ccb_scanq);
 899         STAILQ_INIT(&xsoftc.highpowerq);
 900         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 901
 902         mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
 903         mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
 904         xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
 905             taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
 906
 907 #ifdef CAM_BOOT_DELAY
 908         /*
 909          * Override this value at compile time to assist our users
 910          * who don't use loader to boot a kernel.
 911          */
 912         xsoftc.boot_delay = CAM_BOOT_DELAY;
 913 #endif
 914         /*
 915          * The xpt layer is, itself, the equivalent of a SIM.
 916          * Allow 16 ccbs in the ccb pool for it.  This should
 917          * give decent parallelism when we probe buses and
 918          * perform other XPT functions.
 919          */
 920         devq = cam_simq_alloc(16);
 921         xpt_sim = cam_sim_alloc(xptaction,
 922                                 xptpoll,
 923                                 "xpt",
 924                                 /*softc*/NULL,
 925                                 /*unit*/0,
 926                                 /*mtx*/&xsoftc.xpt_lock,
 927                                 /*max_dev_transactions*/0,
 928                                 /*max_tagged_dev_transactions*/0,
 929                                 devq);
 930         if (xpt_sim == NULL)
 931                 return (ENOMEM);
 932
 933         mtx_lock(&xsoftc.xpt_lock);
 934         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 935                 mtx_unlock(&xsoftc.xpt_lock);
 936                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 937                        " failing attach\n", status);
 938                 return (EINVAL);
 939         }
 940         mtx_unlock(&xsoftc.xpt_lock);
 941
 942         /*
 943          * Looking at the XPT from the SIM layer, the XPT is
 944          * the equivalent of a peripheral driver.  Allocate
 945          * a peripheral driver entry for us.
 946          */
 947         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 948                                       CAM_TARGET_WILDCARD,
 949                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 950                 printf("xpt_init: xpt_create_path failed with status %#x,"
 951                        " failing attach\n", status);
 952                 return (EINVAL);
 953         }
 954         xpt_path_lock(path);
 955         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 956                          path, NULL, 0, xpt_sim);
 957         xpt_path_unlock(path);
 958         xpt_free_path(path);
 959
 960         if (cam_num_doneqs < 1)
 961                 cam_num_doneqs = 1 + mp_ncpus / 6;
 962         else if (cam_num_doneqs > MAXCPU)
 963                 cam_num_doneqs = MAXCPU;
 964         for (i = 0; i < cam_num_doneqs; i++) {
 965                 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 966                     MTX_DEF);
 967                 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
 968                 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 969                     &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 970                 if (error != 0) {
 971                         cam_num_doneqs = i;
 972                         break;
 973                 }
 974         }
 975         if (cam_num_doneqs < 1) {
 976                 printf("xpt_init: Cannot init completion queues "
 977                        "- failing attach\n");
 978                 return (ENOMEM);
 979         }
 980         /*
 981          * Register a callback for when interrupts are enabled.
 982          */
 983         xsoftc.xpt_config_hook =
 984             (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
 985                                               M_CAMXPT, M_NOWAIT | M_ZERO);
 986         if (xsoftc.xpt_config_hook == NULL) {
 987                 printf("xpt_init: Cannot malloc config hook "
 988                        "- failing attach\n");
 989                 return (ENOMEM);
 990         }
 991         xsoftc.xpt_config_hook->ich_func = xpt_config;
 992         if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
 993                 free (xsoftc.xpt_config_hook, M_CAMXPT);
 994                 printf("xpt_init: config_intrhook_establish failed "
 995                        "- failing attach\n");
 996         }
 997
 998         return (0);
 999 }
1000
1001 static cam_status
1002 xptregister(struct cam_periph *periph, void *arg)
1003 {
1004         struct cam_sim *xpt_sim;
1005
1006         if (periph == NULL) {
1007                 printf("xptregister: periph was NULL!!\n");
1008                 return(CAM_REQ_CMP_ERR);
1009         }
1010
1011         xpt_sim = (struct cam_sim *)arg;
1012         xpt_sim->softc = periph;
1013         xpt_periph = periph;
1014         periph->softc = NULL;
1015
1016         return(CAM_REQ_CMP);
1017 }
1018
1019 int32_t
1020 xpt_add_periph(struct cam_periph *periph)
1021 {
1022         struct cam_ed *device;
1023         int32_t  status;
1024
1025         TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
1026         device = periph->path->device;
1027         status = CAM_REQ_CMP;
1028         if (device != NULL) {
1029                 mtx_lock(&device->target->bus->eb_mtx);
1030                 device->generation++;
1031                 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
1032                 mtx_unlock(&device->target->bus->eb_mtx);
1033                 atomic_add_32(&xsoftc.xpt_generation, 1);
1034         }
1035
1036         return (status);
1037 }
1038
1039 void
1040 xpt_remove_periph(struct cam_periph *periph)
1041 {
1042         struct cam_ed *device;
1043
1044         device = periph->path->device;
1045         if (device != NULL) {
1046                 mtx_lock(&device->target->bus->eb_mtx);
1047                 device->generation++;
1048                 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1049                 mtx_unlock(&device->target->bus->eb_mtx);
1050                 atomic_add_32(&xsoftc.xpt_generation, 1);
1051         }
1052 }
1053
1054
1055 void
1056 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1057 {
1058         struct  cam_path *path = periph->path;
1059         struct  xpt_proto *proto;
1060
1061         cam_periph_assert(periph, MA_OWNED);
1062         periph->flags |= CAM_PERIPH_ANNOUNCED;
1063
1064         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1065                periph->periph_name, periph->unit_number,
1066                path->bus->sim->sim_name,
1067                path->bus->sim->unit_number,
1068                path->bus->sim->bus_id,
1069                path->bus->path_id,
1070                path->target->target_id,
1071                (uintmax_t)path->device->lun_id);
1072         printf("%s%d: ", periph->periph_name, periph->unit_number);
1073         proto = xpt_proto_find(path->device->protocol);
1074         if (proto)
1075                 proto->ops->announce(path->device);
1076         else
1077                 printf("%s%d: Unknown protocol device %d\n",
1078                     periph->periph_name, periph->unit_number,
1079                     path->device->protocol);
1080         if (path->device->serial_num_len > 0) {
1081                 /* Don't wrap the screen  - print only the first 60 chars */
1082                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1083                        periph->unit_number, path->device->serial_num);
1084         }
1085         /* Announce transport details. */
1086         path->bus->xport->ops->announce(periph);
1087         /* Announce command queueing. */
1088         if (path->device->inq_flags & SID_CmdQue
1089          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1090                 printf("%s%d: Command Queueing enabled\n",
1091                        periph->periph_name, periph->unit_number);
1092         }
1093         /* Announce caller's details if they've passed in. */
1094         if (announce_string != NULL)
1095                 printf("%s%d: %s\n", periph->periph_name,
1096                        periph->unit_number, announce_string);
1097 }
1098
1099 void
1100 xpt_announce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb,
1101     char *announce_string)
1102 {
1103         struct  cam_path *path = periph->path;
1104         struct  xpt_proto *proto;
1105
1106         cam_periph_assert(periph, MA_OWNED);
1107         periph->flags |= CAM_PERIPH_ANNOUNCED;
1108
1109         /* Fall back to the non-sbuf method if necessary */
1110         if (xsoftc.announce_nosbuf != 0) {
1111                 xpt_announce_periph(periph, announce_string);
1112                 return;
1113         }
1114         proto = xpt_proto_find(path->device->protocol);
1115         if (((proto != NULL) && (proto->ops->announce_sbuf == NULL)) ||
1116             (path->bus->xport->ops->announce_sbuf == NULL)) {
1117                 xpt_announce_periph(periph, announce_string);
1118                 return;
1119         }
1120
1121         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1122             periph->periph_name, periph->unit_number,
1123             path->bus->sim->sim_name,
1124             path->bus->sim->unit_number,
1125             path->bus->sim->bus_id,
1126             path->bus->path_id,
1127             path->target->target_id,
1128             (uintmax_t)path->device->lun_id);
1129         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1130
1131         if (proto)
1132                 proto->ops->announce_sbuf(path->device, sb);
1133         else
1134                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1135                     periph->periph_name, periph->unit_number,
1136                     path->device->protocol);
1137         if (path->device->serial_num_len > 0) {
1138                 /* Don't wrap the screen  - print only the first 60 chars */
1139                 sbuf_printf(sb, "%s%d: Serial Number %.60s\n",
1140                     periph->periph_name, periph->unit_number,
1141                     path->device->serial_num);
1142         }
1143         /* Announce transport details. */
1144         path->bus->xport->ops->announce_sbuf(periph, sb);
1145         /* Announce command queueing. */
1146         if (path->device->inq_flags & SID_CmdQue
1147          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1148                 sbuf_printf(sb, "%s%d: Command Queueing enabled\n",
1149                     periph->periph_name, periph->unit_number);
1150         }
1151         /* Announce caller's details if they've passed in. */
1152         if (announce_string != NULL)
1153                 sbuf_printf(sb, "%s%d: %s\n", periph->periph_name,
1154                     periph->unit_number, announce_string);
1155 }
1156
1157 void
1158 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1159 {
1160         if (quirks != 0) {
1161                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1162                     periph->unit_number, quirks, bit_string);
1163         }
1164 }
1165
1166 void
1167 xpt_announce_quirks_sbuf(struct cam_periph *periph, struct sbuf *sb,
1168                          int quirks, char *bit_string)
1169 {
1170         if (xsoftc.announce_nosbuf != 0) {
1171                 xpt_announce_quirks(periph, quirks, bit_string);
1172                 return;
1173         }
1174
1175         if (quirks != 0) {
1176                 sbuf_printf(sb, "%s%d: quirks=0x%b\n", periph->periph_name,
1177                     periph->unit_number, quirks, bit_string);
1178         }
1179 }
1180
1181 void
1182 xpt_denounce_periph(struct cam_periph *periph)
1183 {
1184         struct  cam_path *path = periph->path;
1185         struct  xpt_proto *proto;
1186
1187         cam_periph_assert(periph, MA_OWNED);
1188         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1189                periph->periph_name, periph->unit_number,
1190                path->bus->sim->sim_name,
1191                path->bus->sim->unit_number,
1192                path->bus->sim->bus_id,
1193                path->bus->path_id,
1194                path->target->target_id,
1195                (uintmax_t)path->device->lun_id);
1196         printf("%s%d: ", periph->periph_name, periph->unit_number);
1197         proto = xpt_proto_find(path->device->protocol);
1198         if (proto)
1199                 proto->ops->denounce(path->device);
1200         else
1201                 printf("%s%d: Unknown protocol device %d\n",
1202                     periph->periph_name, periph->unit_number,
1203                     path->device->protocol);
1204         if (path->device->serial_num_len > 0)
1205                 printf(" s/n %.60s", path->device->serial_num);
1206         printf(" detached\n");
1207 }
1208
1209 void
1210 xpt_denounce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb)
1211 {
1212         struct cam_path *path = periph->path;
1213         struct xpt_proto *proto;
1214
1215         cam_periph_assert(periph, MA_OWNED);
1216
1217         /* Fall back to the non-sbuf method if necessary */
1218         if (xsoftc.announce_nosbuf != 0) {
1219                 xpt_denounce_periph(periph);
1220                 return;
1221         }
1222         proto = xpt_proto_find(path->device->protocol);
1223         if ((proto != NULL) && (proto->ops->denounce_sbuf == NULL)) {
1224                 xpt_denounce_periph(periph);
1225                 return;
1226         }
1227
1228         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1229             periph->periph_name, periph->unit_number,
1230             path->bus->sim->sim_name,
1231             path->bus->sim->unit_number,
1232             path->bus->sim->bus_id,
1233             path->bus->path_id,
1234             path->target->target_id,
1235             (uintmax_t)path->device->lun_id);
1236         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1237
1238         if (proto)
1239                 proto->ops->denounce_sbuf(path->device, sb);
1240         else
1241                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1242                     periph->periph_name, periph->unit_number,
1243                     path->device->protocol);
1244         if (path->device->serial_num_len > 0)
1245                 sbuf_printf(sb, " s/n %.60s", path->device->serial_num);
1246         sbuf_printf(sb, " detached\n");
1247 }
1248
1249 int
1250 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1251 {
1252         int ret = -1, l, o;
1253         struct ccb_dev_advinfo cdai;
1254         struct scsi_vpd_id_descriptor *idd;
1255
1256         xpt_path_assert(path, MA_OWNED);
1257
1258         memset(&cdai, 0, sizeof(cdai));
1259         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1260         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1261         cdai.flags = CDAI_FLAG_NONE;
1262         cdai.bufsiz = len;
1263
1264         if (!strcmp(attr, "GEOM::ident"))
1265                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1266         else if (!strcmp(attr, "GEOM::physpath"))
1267                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1268         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1269                  strcmp(attr, "GEOM::lunname") == 0) {
1270                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1271                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1272         } else
1273                 goto out;
1274
1275         cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1276         if (cdai.buf == NULL) {
1277                 ret = ENOMEM;
1278                 goto out;
1279         }
1280         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1281         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1282                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1283         if (cdai.provsiz == 0)
1284                 goto out;
1285         if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1286                 if (strcmp(attr, "GEOM::lunid") == 0) {
1287                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1288                             cdai.provsiz, scsi_devid_is_lun_naa);
1289                         if (idd == NULL)
1290                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1291                                     cdai.provsiz, scsi_devid_is_lun_eui64);
1292                         if (idd == NULL)
1293                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1294                                     cdai.provsiz, scsi_devid_is_lun_uuid);
1295                         if (idd == NULL)
1296                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1297                                     cdai.provsiz, scsi_devid_is_lun_md5);
1298                 } else
1299                         idd = NULL;
1300                 if (idd == NULL)
1301                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1302                             cdai.provsiz, scsi_devid_is_lun_t10);
1303                 if (idd == NULL)
1304                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1305                             cdai.provsiz, scsi_devid_is_lun_name);
1306                 if (idd == NULL)
1307                         goto out;
1308                 ret = 0;
1309                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) {
1310                         if (idd->length < len) {
1311                                 for (l = 0; l < idd->length; l++)
1312                                         buf[l] = idd->identifier[l] ?
1313                                             idd->identifier[l] : ' ';
1314                                 buf[l] = 0;
1315                         } else
1316                                 ret = EFAULT;
1317                 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1318                         l = strnlen(idd->identifier, idd->length);
1319                         if (l < len) {
1320                                 bcopy(idd->identifier, buf, l);
1321                                 buf[l] = 0;
1322                         } else
1323                                 ret = EFAULT;
1324                 } else if ((idd->id_type & SVPD_ID_TYPE_MASK) == SVPD_ID_TYPE_UUID
1325                     && idd->identifier[0] == 0x10) {
1326                         if ((idd->length - 2) * 2 + 4 < len) {
1327                                 for (l = 2, o = 0; l < idd->length; l++) {
1328                                         if (l == 6 || l == 8 || l == 10 || l == 12)
1329                                             o += sprintf(buf + o, "-");
1330                                         o += sprintf(buf + o, "%02x",
1331                                             idd->identifier[l]);
1332                                 }
1333                         } else
1334                                 ret = EFAULT;
1335                 } else {
1336                         if (idd->length * 2 < len) {
1337                                 for (l = 0; l < idd->length; l++)
1338                                         sprintf(buf + l * 2, "%02x",
1339                                             idd->identifier[l]);
1340                         } else
1341                                 ret = EFAULT;
1342                 }
1343         } else {
1344                 ret = 0;
1345                 if (strlcpy(buf, cdai.buf, len) >= len)
1346                         ret = EFAULT;
1347         }
1348
1349 out:
1350         if (cdai.buf != NULL)
1351                 free(cdai.buf, M_CAMXPT);
1352         return ret;
1353 }
1354
1355 static dev_match_ret
1356 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1357             struct cam_eb *bus)
1358 {
1359         dev_match_ret retval;
1360         u_int i;
1361
1362         retval = DM_RET_NONE;
1363
1364         /*
1365          * If we aren't given something to match against, that's an error.
1366          */
1367         if (bus == NULL)
1368                 return(DM_RET_ERROR);
1369
1370         /*
1371          * If there are no match entries, then this bus matches no
1372          * matter what.
1373          */
1374         if ((patterns == NULL) || (num_patterns == 0))
1375                 return(DM_RET_DESCEND | DM_RET_COPY);
1376
1377         for (i = 0; i < num_patterns; i++) {
1378                 struct bus_match_pattern *cur_pattern;
1379
1380                 /*
1381                  * If the pattern in question isn't for a bus node, we
1382                  * aren't interested.  However, we do indicate to the
1383                  * calling routine that we should continue descending the
1384                  * tree, since the user wants to match against lower-level
1385                  * EDT elements.
1386                  */
1387                 if (patterns[i].type != DEV_MATCH_BUS) {
1388                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1389                                 retval |= DM_RET_DESCEND;
1390                         continue;
1391                 }
1392
1393                 cur_pattern = &patterns[i].pattern.bus_pattern;
1394
1395                 /*
1396                  * If they want to match any bus node, we give them any
1397                  * device node.
1398                  */
1399                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1400                         /* set the copy flag */
1401                         retval |= DM_RET_COPY;
1402
1403                         /*
1404                          * If we've already decided on an action, go ahead
1405                          * and return.
1406                          */
1407                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1408                                 return(retval);
1409                 }
1410
1411                 /*
1412                  * Not sure why someone would do this...
1413                  */
1414                 if (cur_pattern->flags == BUS_MATCH_NONE)
1415                         continue;
1416
1417                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1418                  && (cur_pattern->path_id != bus->path_id))
1419                         continue;
1420
1421                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1422                  && (cur_pattern->bus_id != bus->sim->bus_id))
1423                         continue;
1424
1425                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1426                  && (cur_pattern->unit_number != bus->sim->unit_number))
1427                         continue;
1428
1429                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1430                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1431                              DEV_IDLEN) != 0))
1432                         continue;
1433
1434                 /*
1435                  * If we get to this point, the user definitely wants
1436                  * information on this bus.  So tell the caller to copy the
1437                  * data out.
1438                  */
1439                 retval |= DM_RET_COPY;
1440
1441                 /*
1442                  * If the return action has been set to descend, then we
1443                  * know that we've already seen a non-bus matching
1444                  * expression, therefore we need to further descend the tree.
1445                  * This won't change by continuing around the loop, so we
1446                  * go ahead and return.  If we haven't seen a non-bus
1447                  * matching expression, we keep going around the loop until
1448                  * we exhaust the matching expressions.  We'll set the stop
1449                  * flag once we fall out of the loop.
1450                  */
1451                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1452                         return(retval);
1453         }
1454
1455         /*
1456          * If the return action hasn't been set to descend yet, that means
1457          * we haven't seen anything other than bus matching patterns.  So
1458          * tell the caller to stop descending the tree -- the user doesn't
1459          * want to match against lower level tree elements.
1460          */
1461         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1462                 retval |= DM_RET_STOP;
1463
1464         return(retval);
1465 }
1466
1467 static dev_match_ret
1468 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1469                struct cam_ed *device)
1470 {
1471         dev_match_ret retval;
1472         u_int i;
1473
1474         retval = DM_RET_NONE;
1475
1476         /*
1477          * If we aren't given something to match against, that's an error.
1478          */
1479         if (device == NULL)
1480                 return(DM_RET_ERROR);
1481
1482         /*
1483          * If there are no match entries, then this device matches no
1484          * matter what.
1485          */
1486         if ((patterns == NULL) || (num_patterns == 0))
1487                 return(DM_RET_DESCEND | DM_RET_COPY);
1488
1489         for (i = 0; i < num_patterns; i++) {
1490                 struct device_match_pattern *cur_pattern;
1491                 struct scsi_vpd_device_id *device_id_page;
1492
1493                 /*
1494                  * If the pattern in question isn't for a device node, we
1495                  * aren't interested.
1496                  */
1497                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1498                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1499                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1500                                 retval |= DM_RET_DESCEND;
1501                         continue;
1502                 }
1503
1504                 cur_pattern = &patterns[i].pattern.device_pattern;
1505
1506                 /* Error out if mutually exclusive options are specified. */
1507                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1508                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1509                         return(DM_RET_ERROR);
1510
1511                 /*
1512                  * If they want to match any device node, we give them any
1513                  * device node.
1514                  */
1515                 if (cur_pattern->flags == DEV_MATCH_ANY)
1516                         goto copy_dev_node;
1517
1518                 /*
1519                  * Not sure why someone would do this...
1520                  */
1521                 if (cur_pattern->flags == DEV_MATCH_NONE)
1522                         continue;
1523
1524                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1525                  && (cur_pattern->path_id != device->target->bus->path_id))
1526                         continue;
1527
1528                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1529                  && (cur_pattern->target_id != device->target->target_id))
1530                         continue;
1531
1532                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1533                  && (cur_pattern->target_lun != device->lun_id))
1534                         continue;
1535
1536                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1537                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1538                                     (caddr_t)&cur_pattern->data.inq_pat,
1539                                     1, sizeof(cur_pattern->data.inq_pat),
1540                                     scsi_static_inquiry_match) == NULL))
1541                         continue;
1542
1543                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1544                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1545                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1546                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1547                                       device->device_id_len
1548                                     - SVPD_DEVICE_ID_HDR_LEN,
1549                                       cur_pattern->data.devid_pat.id,
1550                                       cur_pattern->data.devid_pat.id_len) != 0))
1551                         continue;
1552
1553 copy_dev_node:
1554                 /*
1555                  * If we get to this point, the user definitely wants
1556                  * information on this device.  So tell the caller to copy
1557                  * the data out.
1558                  */
1559                 retval |= DM_RET_COPY;
1560
1561                 /*
1562                  * If the return action has been set to descend, then we
1563                  * know that we've already seen a peripheral matching
1564                  * expression, therefore we need to further descend the tree.
1565                  * This won't change by continuing around the loop, so we
1566                  * go ahead and return.  If we haven't seen a peripheral
1567                  * matching expression, we keep going around the loop until
1568                  * we exhaust the matching expressions.  We'll set the stop
1569                  * flag once we fall out of the loop.
1570                  */
1571                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1572                         return(retval);
1573         }
1574
1575         /*
1576          * If the return action hasn't been set to descend yet, that means
1577          * we haven't seen any peripheral matching patterns.  So tell the
1578          * caller to stop descending the tree -- the user doesn't want to
1579          * match against lower level tree elements.
1580          */
1581         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1582                 retval |= DM_RET_STOP;
1583
1584         return(retval);
1585 }
1586
1587 /*
1588  * Match a single peripheral against any number of match patterns.
1589  */
1590 static dev_match_ret
1591 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1592                struct cam_periph *periph)
1593 {
1594         dev_match_ret retval;
1595         u_int i;
1596
1597         /*
1598          * If we aren't given something to match against, that's an error.
1599          */
1600         if (periph == NULL)
1601                 return(DM_RET_ERROR);
1602
1603         /*
1604          * If there are no match entries, then this peripheral matches no
1605          * matter what.
1606          */
1607         if ((patterns == NULL) || (num_patterns == 0))
1608                 return(DM_RET_STOP | DM_RET_COPY);
1609
1610         /*
1611          * There aren't any nodes below a peripheral node, so there's no
1612          * reason to descend the tree any further.
1613          */
1614         retval = DM_RET_STOP;
1615
1616         for (i = 0; i < num_patterns; i++) {
1617                 struct periph_match_pattern *cur_pattern;
1618
1619                 /*
1620                  * If the pattern in question isn't for a peripheral, we
1621                  * aren't interested.
1622                  */
1623                 if (patterns[i].type != DEV_MATCH_PERIPH)
1624                         continue;
1625
1626                 cur_pattern = &patterns[i].pattern.periph_pattern;
1627
1628                 /*
1629                  * If they want to match on anything, then we will do so.
1630                  */
1631                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1632                         /* set the copy flag */
1633                         retval |= DM_RET_COPY;
1634
1635                         /*
1636                          * We've already set the return action to stop,
1637                          * since there are no nodes below peripherals in
1638                          * the tree.
1639                          */
1640                         return(retval);
1641                 }
1642
1643                 /*
1644                  * Not sure why someone would do this...
1645                  */
1646                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1647                         continue;
1648
1649                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1650                  && (cur_pattern->path_id != periph->path->bus->path_id))
1651                         continue;
1652
1653                 /*
1654                  * For the target and lun id's, we have to make sure the
1655                  * target and lun pointers aren't NULL.  The xpt peripheral
1656                  * has a wildcard target and device.
1657                  */
1658                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1659                  && ((periph->path->target == NULL)
1660                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1661                         continue;
1662
1663                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1664                  && ((periph->path->device == NULL)
1665                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1666                         continue;
1667
1668                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1669                  && (cur_pattern->unit_number != periph->unit_number))
1670                         continue;
1671
1672                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1673                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1674                              DEV_IDLEN) != 0))
1675                         continue;
1676
1677                 /*
1678                  * If we get to this point, the user definitely wants
1679                  * information on this peripheral.  So tell the caller to
1680                  * copy the data out.
1681                  */
1682                 retval |= DM_RET_COPY;
1683
1684                 /*
1685                  * The return action has already been set to stop, since
1686                  * peripherals don't have any nodes below them in the EDT.
1687                  */
1688                 return(retval);
1689         }
1690
1691         /*
1692          * If we get to this point, the peripheral that was passed in
1693          * doesn't match any of the patterns.
1694          */
1695         return(retval);
1696 }
1697
1698 static int
1699 xptedtbusfunc(struct cam_eb *bus, void *arg)
1700 {
1701         struct ccb_dev_match *cdm;
1702         struct cam_et *target;
1703         dev_match_ret retval;
1704
1705         cdm = (struct ccb_dev_match *)arg;
1706
1707         /*
1708          * If our position is for something deeper in the tree, that means
1709          * that we've already seen this node.  So, we keep going down.
1710          */
1711         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1712          && (cdm->pos.cookie.bus == bus)
1713          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1714          && (cdm->pos.cookie.target != NULL))
1715                 retval = DM_RET_DESCEND;
1716         else
1717                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1718
1719         /*
1720          * If we got an error, bail out of the search.
1721          */
1722         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1723                 cdm->status = CAM_DEV_MATCH_ERROR;
1724                 return(0);
1725         }
1726
1727         /*
1728          * If the copy flag is set, copy this bus out.
1729          */
1730         if (retval & DM_RET_COPY) {
1731                 int spaceleft, j;
1732
1733                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1734                         sizeof(struct dev_match_result));
1735
1736                 /*
1737                  * If we don't have enough space to put in another
1738                  * match result, save our position and tell the
1739                  * user there are more devices to check.
1740                  */
1741                 if (spaceleft < sizeof(struct dev_match_result)) {
1742                         bzero(&cdm->pos, sizeof(cdm->pos));
1743                         cdm->pos.position_type =
1744                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1745
1746                         cdm->pos.cookie.bus = bus;
1747                         cdm->pos.generations[CAM_BUS_GENERATION]=
1748                                 xsoftc.bus_generation;
1749                         cdm->status = CAM_DEV_MATCH_MORE;
1750                         return(0);
1751                 }
1752                 j = cdm->num_matches;
1753                 cdm->num_matches++;
1754                 cdm->matches[j].type = DEV_MATCH_BUS;
1755                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1756                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1757                 cdm->matches[j].result.bus_result.unit_number =
1758                         bus->sim->unit_number;
1759                 strncpy(cdm->matches[j].result.bus_result.dev_name,
1760                         bus->sim->sim_name, DEV_IDLEN);
1761         }
1762
1763         /*
1764          * If the user is only interested in buses, there's no
1765          * reason to descend to the next level in the tree.
1766          */
1767         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1768                 return(1);
1769
1770         /*
1771          * If there is a target generation recorded, check it to
1772          * make sure the target list hasn't changed.
1773          */
1774         mtx_lock(&bus->eb_mtx);
1775         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1776          && (cdm->pos.cookie.bus == bus)
1777          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1778          && (cdm->pos.cookie.target != NULL)) {
1779                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1780                     bus->generation)) {
1781                         mtx_unlock(&bus->eb_mtx);
1782                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1783                         return (0);
1784                 }
1785                 target = (struct cam_et *)cdm->pos.cookie.target;
1786                 target->refcount++;
1787         } else
1788                 target = NULL;
1789         mtx_unlock(&bus->eb_mtx);
1790
1791         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1792 }
1793
1794 static int
1795 xptedttargetfunc(struct cam_et *target, void *arg)
1796 {
1797         struct ccb_dev_match *cdm;
1798         struct cam_eb *bus;
1799         struct cam_ed *device;
1800
1801         cdm = (struct ccb_dev_match *)arg;
1802         bus = target->bus;
1803
1804         /*
1805          * If there is a device list generation recorded, check it to
1806          * make sure the device list hasn't changed.
1807          */
1808         mtx_lock(&bus->eb_mtx);
1809         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1810          && (cdm->pos.cookie.bus == bus)
1811          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1812          && (cdm->pos.cookie.target == target)
1813          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1814          && (cdm->pos.cookie.device != NULL)) {
1815                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1816                     target->generation) {
1817                         mtx_unlock(&bus->eb_mtx);
1818                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1819                         return(0);
1820                 }
1821                 device = (struct cam_ed *)cdm->pos.cookie.device;
1822                 device->refcount++;
1823         } else
1824                 device = NULL;
1825         mtx_unlock(&bus->eb_mtx);
1826
1827         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1828 }
1829
1830 static int
1831 xptedtdevicefunc(struct cam_ed *device, void *arg)
1832 {
1833         struct cam_eb *bus;
1834         struct cam_periph *periph;
1835         struct ccb_dev_match *cdm;
1836         dev_match_ret retval;
1837
1838         cdm = (struct ccb_dev_match *)arg;
1839         bus = device->target->bus;
1840
1841         /*
1842          * If our position is for something deeper in the tree, that means
1843          * that we've already seen this node.  So, we keep going down.
1844          */
1845         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1846          && (cdm->pos.cookie.device == device)
1847          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1848          && (cdm->pos.cookie.periph != NULL))
1849                 retval = DM_RET_DESCEND;
1850         else
1851                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1852                                         device);
1853
1854         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1855                 cdm->status = CAM_DEV_MATCH_ERROR;
1856                 return(0);
1857         }
1858
1859         /*
1860          * If the copy flag is set, copy this device out.
1861          */
1862         if (retval & DM_RET_COPY) {
1863                 int spaceleft, j;
1864
1865                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1866                         sizeof(struct dev_match_result));
1867
1868                 /*
1869                  * If we don't have enough space to put in another
1870                  * match result, save our position and tell the
1871                  * user there are more devices to check.
1872                  */
1873                 if (spaceleft < sizeof(struct dev_match_result)) {
1874                         bzero(&cdm->pos, sizeof(cdm->pos));
1875                         cdm->pos.position_type =
1876                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1877                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1878
1879                         cdm->pos.cookie.bus = device->target->bus;
1880                         cdm->pos.generations[CAM_BUS_GENERATION]=
1881                                 xsoftc.bus_generation;
1882                         cdm->pos.cookie.target = device->target;
1883                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1884                                 device->target->bus->generation;
1885                         cdm->pos.cookie.device = device;
1886                         cdm->pos.generations[CAM_DEV_GENERATION] =
1887                                 device->target->generation;
1888                         cdm->status = CAM_DEV_MATCH_MORE;
1889                         return(0);
1890                 }
1891                 j = cdm->num_matches;
1892                 cdm->num_matches++;
1893                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1894                 cdm->matches[j].result.device_result.path_id =
1895                         device->target->bus->path_id;
1896                 cdm->matches[j].result.device_result.target_id =
1897                         device->target->target_id;
1898                 cdm->matches[j].result.device_result.target_lun =
1899                         device->lun_id;
1900                 cdm->matches[j].result.device_result.protocol =
1901                         device->protocol;
1902                 bcopy(&device->inq_data,
1903                       &cdm->matches[j].result.device_result.inq_data,
1904                       sizeof(struct scsi_inquiry_data));
1905                 bcopy(&device->ident_data,
1906                       &cdm->matches[j].result.device_result.ident_data,
1907                       sizeof(struct ata_params));
1908                 bcopy(&device->mmc_ident_data,
1909                       &cdm->matches[j].result.device_result.mmc_ident_data,
1910                       sizeof(struct mmc_params));
1911
1912                 /* Let the user know whether this device is unconfigured */
1913                 if (device->flags & CAM_DEV_UNCONFIGURED)
1914                         cdm->matches[j].result.device_result.flags =
1915                                 DEV_RESULT_UNCONFIGURED;
1916                 else
1917                         cdm->matches[j].result.device_result.flags =
1918                                 DEV_RESULT_NOFLAG;
1919         }
1920
1921         /*
1922          * If the user isn't interested in peripherals, don't descend
1923          * the tree any further.
1924          */
1925         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1926                 return(1);
1927
1928         /*
1929          * If there is a peripheral list generation recorded, make sure
1930          * it hasn't changed.
1931          */
1932         xpt_lock_buses();
1933         mtx_lock(&bus->eb_mtx);
1934         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1935          && (cdm->pos.cookie.bus == bus)
1936          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1937          && (cdm->pos.cookie.target == device->target)
1938          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1939          && (cdm->pos.cookie.device == device)
1940          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1941          && (cdm->pos.cookie.periph != NULL)) {
1942                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1943                     device->generation) {
1944                         mtx_unlock(&bus->eb_mtx);
1945                         xpt_unlock_buses();
1946                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1947                         return(0);
1948                 }
1949                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1950                 periph->refcount++;
1951         } else
1952                 periph = NULL;
1953         mtx_unlock(&bus->eb_mtx);
1954         xpt_unlock_buses();
1955
1956         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1957 }
1958
1959 static int
1960 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1961 {
1962         struct ccb_dev_match *cdm;
1963         dev_match_ret retval;
1964
1965         cdm = (struct ccb_dev_match *)arg;
1966
1967         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1968
1969         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1970                 cdm->status = CAM_DEV_MATCH_ERROR;
1971                 return(0);
1972         }
1973
1974         /*
1975          * If the copy flag is set, copy this peripheral out.
1976          */
1977         if (retval & DM_RET_COPY) {
1978                 int spaceleft, j;
1979
1980                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1981                         sizeof(struct dev_match_result));
1982
1983                 /*
1984                  * If we don't have enough space to put in another
1985                  * match result, save our position and tell the
1986                  * user there are more devices to check.
1987                  */
1988                 if (spaceleft < sizeof(struct dev_match_result)) {
1989                         bzero(&cdm->pos, sizeof(cdm->pos));
1990                         cdm->pos.position_type =
1991                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1992                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1993                                 CAM_DEV_POS_PERIPH;
1994
1995                         cdm->pos.cookie.bus = periph->path->bus;
1996                         cdm->pos.generations[CAM_BUS_GENERATION]=
1997                                 xsoftc.bus_generation;
1998                         cdm->pos.cookie.target = periph->path->target;
1999                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2000                                 periph->path->bus->generation;
2001                         cdm->pos.cookie.device = periph->path->device;
2002                         cdm->pos.generations[CAM_DEV_GENERATION] =
2003                                 periph->path->target->generation;
2004                         cdm->pos.cookie.periph = periph;
2005                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2006                                 periph->path->device->generation;
2007                         cdm->status = CAM_DEV_MATCH_MORE;
2008                         return(0);
2009                 }
2010
2011                 j = cdm->num_matches;
2012                 cdm->num_matches++;
2013                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2014                 cdm->matches[j].result.periph_result.path_id =
2015                         periph->path->bus->path_id;
2016                 cdm->matches[j].result.periph_result.target_id =
2017                         periph->path->target->target_id;
2018                 cdm->matches[j].result.periph_result.target_lun =
2019                         periph->path->device->lun_id;
2020                 cdm->matches[j].result.periph_result.unit_number =
2021                         periph->unit_number;
2022                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2023                         periph->periph_name, DEV_IDLEN);
2024         }
2025
2026         return(1);
2027 }
2028
2029 static int
2030 xptedtmatch(struct ccb_dev_match *cdm)
2031 {
2032         struct cam_eb *bus;
2033         int ret;
2034
2035         cdm->num_matches = 0;
2036
2037         /*
2038          * Check the bus list generation.  If it has changed, the user
2039          * needs to reset everything and start over.
2040          */
2041         xpt_lock_buses();
2042         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2043          && (cdm->pos.cookie.bus != NULL)) {
2044                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
2045                     xsoftc.bus_generation) {
2046                         xpt_unlock_buses();
2047                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2048                         return(0);
2049                 }
2050                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
2051                 bus->refcount++;
2052         } else
2053                 bus = NULL;
2054         xpt_unlock_buses();
2055
2056         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
2057
2058         /*
2059          * If we get back 0, that means that we had to stop before fully
2060          * traversing the EDT.  It also means that one of the subroutines
2061          * has set the status field to the proper value.  If we get back 1,
2062          * we've fully traversed the EDT and copied out any matching entries.
2063          */
2064         if (ret == 1)
2065                 cdm->status = CAM_DEV_MATCH_LAST;
2066
2067         return(ret);
2068 }
2069
2070 static int
2071 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2072 {
2073         struct cam_periph *periph;
2074         struct ccb_dev_match *cdm;
2075
2076         cdm = (struct ccb_dev_match *)arg;
2077
2078         xpt_lock_buses();
2079         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2080          && (cdm->pos.cookie.pdrv == pdrv)
2081          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2082          && (cdm->pos.cookie.periph != NULL)) {
2083                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2084                     (*pdrv)->generation) {
2085                         xpt_unlock_buses();
2086                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2087                         return(0);
2088                 }
2089                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
2090                 periph->refcount++;
2091         } else
2092                 periph = NULL;
2093         xpt_unlock_buses();
2094
2095         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
2096 }
2097
2098 static int
2099 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2100 {
2101         struct ccb_dev_match *cdm;
2102         dev_match_ret retval;
2103
2104         cdm = (struct ccb_dev_match *)arg;
2105
2106         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2107
2108         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2109                 cdm->status = CAM_DEV_MATCH_ERROR;
2110                 return(0);
2111         }
2112
2113         /*
2114          * If the copy flag is set, copy this peripheral out.
2115          */
2116         if (retval & DM_RET_COPY) {
2117                 int spaceleft, j;
2118
2119                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2120                         sizeof(struct dev_match_result));
2121
2122                 /*
2123                  * If we don't have enough space to put in another
2124                  * match result, save our position and tell the
2125                  * user there are more devices to check.
2126                  */
2127                 if (spaceleft < sizeof(struct dev_match_result)) {
2128                         struct periph_driver **pdrv;
2129
2130                         pdrv = NULL;
2131                         bzero(&cdm->pos, sizeof(cdm->pos));
2132                         cdm->pos.position_type =
2133                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2134                                 CAM_DEV_POS_PERIPH;
2135
2136                         /*
2137                          * This may look a bit non-sensical, but it is
2138                          * actually quite logical.  There are very few
2139                          * peripheral drivers, and bloating every peripheral
2140                          * structure with a pointer back to its parent
2141                          * peripheral driver linker set entry would cost
2142                          * more in the long run than doing this quick lookup.
2143                          */
2144                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2145                                 if (strcmp((*pdrv)->driver_name,
2146                                     periph->periph_name) == 0)
2147                                         break;
2148                         }
2149
2150                         if (*pdrv == NULL) {
2151                                 cdm->status = CAM_DEV_MATCH_ERROR;
2152                                 return(0);
2153                         }
2154
2155                         cdm->pos.cookie.pdrv = pdrv;
2156                         /*
2157                          * The periph generation slot does double duty, as
2158                          * does the periph pointer slot.  They are used for
2159                          * both edt and pdrv lookups and positioning.
2160                          */
2161                         cdm->pos.cookie.periph = periph;
2162                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2163                                 (*pdrv)->generation;
2164                         cdm->status = CAM_DEV_MATCH_MORE;
2165                         return(0);
2166                 }
2167
2168                 j = cdm->num_matches;
2169                 cdm->num_matches++;
2170                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2171                 cdm->matches[j].result.periph_result.path_id =
2172                         periph->path->bus->path_id;
2173
2174                 /*
2175                  * The transport layer peripheral doesn't have a target or
2176                  * lun.
2177                  */
2178                 if (periph->path->target)
2179                         cdm->matches[j].result.periph_result.target_id =
2180                                 periph->path->target->target_id;
2181                 else
2182                         cdm->matches[j].result.periph_result.target_id =
2183                                 CAM_TARGET_WILDCARD;
2184
2185                 if (periph->path->device)
2186                         cdm->matches[j].result.periph_result.target_lun =
2187                                 periph->path->device->lun_id;
2188                 else
2189                         cdm->matches[j].result.periph_result.target_lun =
2190                                 CAM_LUN_WILDCARD;
2191
2192                 cdm->matches[j].result.periph_result.unit_number =
2193                         periph->unit_number;
2194                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2195                         periph->periph_name, DEV_IDLEN);
2196         }
2197
2198         return(1);
2199 }
2200
2201 static int
2202 xptperiphlistmatch(struct ccb_dev_match *cdm)
2203 {
2204         int ret;
2205
2206         cdm->num_matches = 0;
2207
2208         /*
2209          * At this point in the edt traversal function, we check the bus
2210          * list generation to make sure that no buses have been added or
2211          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2212          * For the peripheral driver list traversal function, however, we
2213          * don't have to worry about new peripheral driver types coming or
2214          * going; they're in a linker set, and therefore can't change
2215          * without a recompile.
2216          */
2217
2218         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2219          && (cdm->pos.cookie.pdrv != NULL))
2220                 ret = xptpdrvtraverse(
2221                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2222                                 xptplistpdrvfunc, cdm);
2223         else
2224                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2225
2226         /*
2227          * If we get back 0, that means that we had to stop before fully
2228          * traversing the peripheral driver tree.  It also means that one of
2229          * the subroutines has set the status field to the proper value.  If
2230          * we get back 1, we've fully traversed the EDT and copied out any
2231          * matching entries.
2232          */
2233         if (ret == 1)
2234                 cdm->status = CAM_DEV_MATCH_LAST;
2235
2236         return(ret);
2237 }
2238
2239 static int
2240 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2241 {
2242         struct cam_eb *bus, *next_bus;
2243         int retval;
2244
2245         retval = 1;
2246         if (start_bus)
2247                 bus = start_bus;
2248         else {
2249                 xpt_lock_buses();
2250                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2251                 if (bus == NULL) {
2252                         xpt_unlock_buses();
2253                         return (retval);
2254                 }
2255                 bus->refcount++;
2256                 xpt_unlock_buses();
2257         }
2258         for (; bus != NULL; bus = next_bus) {
2259                 retval = tr_func(bus, arg);
2260                 if (retval == 0) {
2261                         xpt_release_bus(bus);
2262                         break;
2263                 }
2264                 xpt_lock_buses();
2265                 next_bus = TAILQ_NEXT(bus, links);
2266                 if (next_bus)
2267                         next_bus->refcount++;
2268                 xpt_unlock_buses();
2269                 xpt_release_bus(bus);
2270         }
2271         return(retval);
2272 }
2273
2274 static int
2275 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2276                   xpt_targetfunc_t *tr_func, void *arg)
2277 {
2278         struct cam_et *target, *next_target;
2279         int retval;
2280
2281         retval = 1;
2282         if (start_target)
2283                 target = start_target;
2284         else {
2285                 mtx_lock(&bus->eb_mtx);
2286                 target = TAILQ_FIRST(&bus->et_entries);
2287                 if (target == NULL) {
2288                         mtx_unlock(&bus->eb_mtx);
2289                         return (retval);
2290                 }
2291                 target->refcount++;
2292                 mtx_unlock(&bus->eb_mtx);
2293         }
2294         for (; target != NULL; target = next_target) {
2295                 retval = tr_func(target, arg);
2296                 if (retval == 0) {
2297                         xpt_release_target(target);
2298                         break;
2299                 }
2300                 mtx_lock(&bus->eb_mtx);
2301                 next_target = TAILQ_NEXT(target, links);
2302                 if (next_target)
2303                         next_target->refcount++;
2304                 mtx_unlock(&bus->eb_mtx);
2305                 xpt_release_target(target);
2306         }
2307         return(retval);
2308 }
2309
2310 static int
2311 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2312                   xpt_devicefunc_t *tr_func, void *arg)
2313 {
2314         struct cam_eb *bus;
2315         struct cam_ed *device, *next_device;
2316         int retval;
2317
2318         retval = 1;
2319         bus = target->bus;
2320         if (start_device)
2321                 device = start_device;
2322         else {
2323                 mtx_lock(&bus->eb_mtx);
2324                 device = TAILQ_FIRST(&target->ed_entries);
2325                 if (device == NULL) {
2326                         mtx_unlock(&bus->eb_mtx);
2327                         return (retval);
2328                 }
2329                 device->refcount++;
2330                 mtx_unlock(&bus->eb_mtx);
2331         }
2332         for (; device != NULL; device = next_device) {
2333                 mtx_lock(&device->device_mtx);
2334                 retval = tr_func(device, arg);
2335                 mtx_unlock(&device->device_mtx);
2336                 if (retval == 0) {
2337                         xpt_release_device(device);
2338                         break;
2339                 }
2340                 mtx_lock(&bus->eb_mtx);
2341                 next_device = TAILQ_NEXT(device, links);
2342                 if (next_device)
2343                         next_device->refcount++;
2344                 mtx_unlock(&bus->eb_mtx);
2345                 xpt_release_device(device);
2346         }
2347         return(retval);
2348 }
2349
2350 static int
2351 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2352                   xpt_periphfunc_t *tr_func, void *arg)
2353 {
2354         struct cam_eb *bus;
2355         struct cam_periph *periph, *next_periph;
2356         int retval;
2357
2358         retval = 1;
2359
2360         bus = device->target->bus;
2361         if (start_periph)
2362                 periph = start_periph;
2363         else {
2364                 xpt_lock_buses();
2365                 mtx_lock(&bus->eb_mtx);
2366                 periph = SLIST_FIRST(&device->periphs);
2367                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2368                         periph = SLIST_NEXT(periph, periph_links);
2369                 if (periph == NULL) {
2370                         mtx_unlock(&bus->eb_mtx);
2371                         xpt_unlock_buses();
2372                         return (retval);
2373                 }
2374                 periph->refcount++;
2375                 mtx_unlock(&bus->eb_mtx);
2376                 xpt_unlock_buses();
2377         }
2378         for (; periph != NULL; periph = next_periph) {
2379                 retval = tr_func(periph, arg);
2380                 if (retval == 0) {
2381                         cam_periph_release_locked(periph);
2382                         break;
2383                 }
2384                 xpt_lock_buses();
2385                 mtx_lock(&bus->eb_mtx);
2386                 next_periph = SLIST_NEXT(periph, periph_links);
2387                 while (next_periph != NULL &&
2388                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2389                         next_periph = SLIST_NEXT(next_periph, periph_links);
2390                 if (next_periph)
2391                         next_periph->refcount++;
2392                 mtx_unlock(&bus->eb_mtx);
2393                 xpt_unlock_buses();
2394                 cam_periph_release_locked(periph);
2395         }
2396         return(retval);
2397 }
2398
2399 static int
2400 xptpdrvtraverse(struct periph_driver **start_pdrv,
2401                 xpt_pdrvfunc_t *tr_func, void *arg)
2402 {
2403         struct periph_driver **pdrv;
2404         int retval;
2405
2406         retval = 1;
2407
2408         /*
2409          * We don't traverse the peripheral driver list like we do the
2410          * other lists, because it is a linker set, and therefore cannot be
2411          * changed during runtime.  If the peripheral driver list is ever
2412          * re-done to be something other than a linker set (i.e. it can
2413          * change while the system is running), the list traversal should
2414          * be modified to work like the other traversal functions.
2415          */
2416         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2417              *pdrv != NULL; pdrv++) {
2418                 retval = tr_func(pdrv, arg);
2419
2420                 if (retval == 0)
2421                         return(retval);
2422         }
2423
2424         return(retval);
2425 }
2426
2427 static int
2428 xptpdperiphtraverse(struct periph_driver **pdrv,
2429                     struct cam_periph *start_periph,
2430                     xpt_periphfunc_t *tr_func, void *arg)
2431 {
2432         struct cam_periph *periph, *next_periph;
2433         int retval;
2434
2435         retval = 1;
2436
2437         if (start_periph)
2438                 periph = start_periph;
2439         else {
2440                 xpt_lock_buses();
2441                 periph = TAILQ_FIRST(&(*pdrv)->units);
2442                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2443                         periph = TAILQ_NEXT(periph, unit_links);
2444                 if (periph == NULL) {
2445                         xpt_unlock_buses();
2446                         return (retval);
2447                 }
2448                 periph->refcount++;
2449                 xpt_unlock_buses();
2450         }
2451         for (; periph != NULL; periph = next_periph) {
2452                 cam_periph_lock(periph);
2453                 retval = tr_func(periph, arg);
2454                 cam_periph_unlock(periph);
2455                 if (retval == 0) {
2456                         cam_periph_release(periph);
2457                         break;
2458                 }
2459                 xpt_lock_buses();
2460                 next_periph = TAILQ_NEXT(periph, unit_links);
2461                 while (next_periph != NULL &&
2462                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2463                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2464                 if (next_periph)
2465                         next_periph->refcount++;
2466                 xpt_unlock_buses();
2467                 cam_periph_release(periph);
2468         }
2469         return(retval);
2470 }
2471
2472 static int
2473 xptdefbusfunc(struct cam_eb *bus, void *arg)
2474 {
2475         struct xpt_traverse_config *tr_config;
2476
2477         tr_config = (struct xpt_traverse_config *)arg;
2478
2479         if (tr_config->depth == XPT_DEPTH_BUS) {
2480                 xpt_busfunc_t *tr_func;
2481
2482                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2483
2484                 return(tr_func(bus, tr_config->tr_arg));
2485         } else
2486                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2487 }
2488
2489 static int
2490 xptdeftargetfunc(struct cam_et *target, void *arg)
2491 {
2492         struct xpt_traverse_config *tr_config;
2493
2494         tr_config = (struct xpt_traverse_config *)arg;
2495
2496         if (tr_config->depth == XPT_DEPTH_TARGET) {
2497                 xpt_targetfunc_t *tr_func;
2498
2499                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2500
2501                 return(tr_func(target, tr_config->tr_arg));
2502         } else
2503                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2504 }
2505
2506 static int
2507 xptdefdevicefunc(struct cam_ed *device, void *arg)
2508 {
2509         struct xpt_traverse_config *tr_config;
2510
2511         tr_config = (struct xpt_traverse_config *)arg;
2512
2513         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2514                 xpt_devicefunc_t *tr_func;
2515
2516                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2517
2518                 return(tr_func(device, tr_config->tr_arg));
2519         } else
2520                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2521 }
2522
2523 static int
2524 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2525 {
2526         struct xpt_traverse_config *tr_config;
2527         xpt_periphfunc_t *tr_func;
2528
2529         tr_config = (struct xpt_traverse_config *)arg;
2530
2531         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2532
2533         /*
2534          * Unlike the other default functions, we don't check for depth
2535          * here.  The peripheral driver level is the last level in the EDT,
2536          * so if we're here, we should execute the function in question.
2537          */
2538         return(tr_func(periph, tr_config->tr_arg));
2539 }
2540
2541 /*
2542  * Execute the given function for every bus in the EDT.
2543  */
2544 static int
2545 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2546 {
2547         struct xpt_traverse_config tr_config;
2548
2549         tr_config.depth = XPT_DEPTH_BUS;
2550         tr_config.tr_func = tr_func;
2551         tr_config.tr_arg = arg;
2552
2553         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2554 }
2555
2556 /*
2557  * Execute the given function for every device in the EDT.
2558  */
2559 static int
2560 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2561 {
2562         struct xpt_traverse_config tr_config;
2563
2564         tr_config.depth = XPT_DEPTH_DEVICE;
2565         tr_config.tr_func = tr_func;
2566         tr_config.tr_arg = arg;
2567
2568         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2569 }
2570
2571 static int
2572 xptsetasyncfunc(struct cam_ed *device, void *arg)
2573 {
2574         struct cam_path path;
2575         struct ccb_getdev cgd;
2576         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2577
2578         /*
2579          * Don't report unconfigured devices (Wildcard devs,
2580          * devices only for target mode, device instances
2581          * that have been invalidated but are waiting for
2582          * their last reference count to be released).
2583          */
2584         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2585                 return (1);
2586
2587         xpt_compile_path(&path,
2588                          NULL,
2589                          device->target->bus->path_id,
2590                          device->target->target_id,
2591                          device->lun_id);
2592         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2593         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2594         xpt_action((union ccb *)&cgd);
2595         csa->callback(csa->callback_arg,
2596                             AC_FOUND_DEVICE,
2597                             &path, &cgd);
2598         xpt_release_path(&path);
2599
2600         return(1);
2601 }
2602
2603 static int
2604 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2605 {
2606         struct cam_path path;
2607         struct ccb_pathinq cpi;
2608         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2609
2610         xpt_compile_path(&path, /*periph*/NULL,
2611                          bus->path_id,
2612                          CAM_TARGET_WILDCARD,
2613                          CAM_LUN_WILDCARD);
2614         xpt_path_lock(&path);
2615         xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2616         cpi.ccb_h.func_code = XPT_PATH_INQ;
2617         xpt_action((union ccb *)&cpi);
2618         csa->callback(csa->callback_arg,
2619                             AC_PATH_REGISTERED,
2620                             &path, &cpi);
2621         xpt_path_unlock(&path);
2622         xpt_release_path(&path);
2623
2624         return(1);
2625 }
2626
2627 void
2628 xpt_action(union ccb *start_ccb)
2629 {
2630
2631         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2632             ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2633                 xpt_action_name(start_ccb->ccb_h.func_code)));
2634
2635         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2636         (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb);
2637 }
2638
2639 void
2640 xpt_action_default(union ccb *start_ccb)
2641 {
2642         struct cam_path *path;
2643         struct cam_sim *sim;
2644         struct mtx *mtx;
2645
2646         path = start_ccb->ccb_h.path;
2647         CAM_DEBUG(path, CAM_DEBUG_TRACE,
2648             ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2649                 xpt_action_name(start_ccb->ccb_h.func_code)));
2650
2651         switch (start_ccb->ccb_h.func_code) {
2652         case XPT_SCSI_IO:
2653         {
2654                 struct cam_ed *device;
2655
2656                 /*
2657                  * For the sake of compatibility with SCSI-1
2658                  * devices that may not understand the identify
2659                  * message, we include lun information in the
2660                  * second byte of all commands.  SCSI-1 specifies
2661                  * that luns are a 3 bit value and reserves only 3
2662                  * bits for lun information in the CDB.  Later
2663                  * revisions of the SCSI spec allow for more than 8
2664                  * luns, but have deprecated lun information in the
2665                  * CDB.  So, if the lun won't fit, we must omit.
2666                  *
2667                  * Also be aware that during initial probing for devices,
2668                  * the inquiry information is unknown but initialized to 0.
2669                  * This means that this code will be exercised while probing
2670                  * devices with an ANSI revision greater than 2.
2671                  */
2672                 device = path->device;
2673                 if (device->protocol_version <= SCSI_REV_2
2674                  && start_ccb->ccb_h.target_lun < 8
2675                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2676
2677                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2678                             start_ccb->ccb_h.target_lun << 5;
2679                 }
2680                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2681         }
2682         /* FALLTHROUGH */
2683         case XPT_TARGET_IO:
2684         case XPT_CONT_TARGET_IO:
2685                 start_ccb->csio.sense_resid = 0;
2686                 start_ccb->csio.resid = 0;
2687                 /* FALLTHROUGH */
2688         case XPT_ATA_IO:
2689                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2690                         start_ccb->ataio.resid = 0;
2691                 /* FALLTHROUGH */
2692         case XPT_NVME_IO:
2693                 /* FALLTHROUGH */
2694         case XPT_NVME_ADMIN:
2695                 /* FALLTHROUGH */
2696         case XPT_MMC_IO:
2697                 /* XXX just like nmve_io? */
2698         case XPT_RESET_DEV:
2699         case XPT_ENG_EXEC:
2700         case XPT_SMP_IO:
2701         {
2702                 struct cam_devq *devq;
2703
2704                 devq = path->bus->sim->devq;
2705                 mtx_lock(&devq->send_mtx);
2706                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2707                 if (xpt_schedule_devq(devq, path->device) != 0)
2708                         xpt_run_devq(devq);
2709                 mtx_unlock(&devq->send_mtx);
2710                 break;
2711         }
2712         case XPT_CALC_GEOMETRY:
2713                 /* Filter out garbage */
2714                 if (start_ccb->ccg.block_size == 0
2715                  || start_ccb->ccg.volume_size == 0) {
2716                         start_ccb->ccg.cylinders = 0;
2717                         start_ccb->ccg.heads = 0;
2718                         start_ccb->ccg.secs_per_track = 0;
2719                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2720                         break;
2721                 }
2722 #if defined(__sparc64__)
2723                 /*
2724                  * For sparc64, we may need adjust the geometry of large
2725                  * disks in order to fit the limitations of the 16-bit
2726                  * fields of the VTOC8 disk label.
2727                  */
2728                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2729                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2730                         break;
2731                 }
2732 #endif
2733                 goto call_sim;
2734         case XPT_ABORT:
2735         {
2736                 union ccb* abort_ccb;
2737
2738                 abort_ccb = start_ccb->cab.abort_ccb;
2739                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2740                         struct cam_ed *device;
2741                         struct cam_devq *devq;
2742
2743                         device = abort_ccb->ccb_h.path->device;
2744                         devq = device->sim->devq;
2745
2746                         mtx_lock(&devq->send_mtx);
2747                         if (abort_ccb->ccb_h.pinfo.index > 0) {
2748                                 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb);
2749                                 abort_ccb->ccb_h.status =
2750                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2751                                 xpt_freeze_devq_device(device, 1);
2752                                 mtx_unlock(&devq->send_mtx);
2753                                 xpt_done(abort_ccb);
2754                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2755                                 break;
2756                         }
2757                         mtx_unlock(&devq->send_mtx);
2758
2759                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2760                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2761                                 /*
2762                                  * We've caught this ccb en route to
2763                                  * the SIM.  Flag it for abort and the
2764                                  * SIM will do so just before starting
2765                                  * real work on the CCB.
2766                                  */
2767                                 abort_ccb->ccb_h.status =
2768                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2769                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2770                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2771                                 break;
2772                         }
2773                 }
2774                 if (XPT_FC_IS_QUEUED(abort_ccb)
2775                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2776                         /*
2777                          * It's already completed but waiting
2778                          * for our SWI to get to it.
2779                          */
2780                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2781                         break;
2782                 }
2783                 /*
2784                  * If we weren't able to take care of the abort request
2785                  * in the XPT, pass the request down to the SIM for processing.
2786                  */
2787         }
2788         /* FALLTHROUGH */
2789         case XPT_ACCEPT_TARGET_IO:
2790         case XPT_EN_LUN:
2791         case XPT_IMMED_NOTIFY:
2792         case XPT_NOTIFY_ACK:
2793         case XPT_RESET_BUS:
2794         case XPT_IMMEDIATE_NOTIFY:
2795         case XPT_NOTIFY_ACKNOWLEDGE:
2796         case XPT_GET_SIM_KNOB_OLD:
2797         case XPT_GET_SIM_KNOB:
2798         case XPT_SET_SIM_KNOB:
2799         case XPT_GET_TRAN_SETTINGS:
2800         case XPT_SET_TRAN_SETTINGS:
2801         case XPT_PATH_INQ:
2802 call_sim:
2803                 sim = path->bus->sim;
2804                 mtx = sim->mtx;
2805                 if (mtx && !mtx_owned(mtx))
2806                         mtx_lock(mtx);
2807                 else
2808                         mtx = NULL;
2809
2810                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2811                     ("Calling sim->sim_action(): func=%#x\n", start_ccb->ccb_h.func_code));
2812                 (*(sim->sim_action))(sim, start_ccb);
2813                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2814                     ("sim->sim_action returned: status=%#x\n", start_ccb->ccb_h.status));
2815                 if (mtx)
2816                         mtx_unlock(mtx);
2817                 break;
2818         case XPT_PATH_STATS:
2819                 start_ccb->cpis.last_reset = path->bus->last_reset;
2820                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2821                 break;
2822         case XPT_GDEV_TYPE:
2823         {
2824                 struct cam_ed *dev;
2825
2826                 dev = path->device;
2827                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2828                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2829                 } else {
2830                         struct ccb_getdev *cgd;
2831
2832                         cgd = &start_ccb->cgd;
2833                         cgd->protocol = dev->protocol;
2834                         cgd->inq_data = dev->inq_data;
2835                         cgd->ident_data = dev->ident_data;
2836                         cgd->inq_flags = dev->inq_flags;
2837                         cgd->ccb_h.status = CAM_REQ_CMP;
2838                         cgd->serial_num_len = dev->serial_num_len;
2839                         if ((dev->serial_num_len > 0)
2840                          && (dev->serial_num != NULL))
2841                                 bcopy(dev->serial_num, cgd->serial_num,
2842                                       dev->serial_num_len);
2843                 }
2844                 break;
2845         }
2846         case XPT_GDEV_STATS:
2847         {
2848                 struct ccb_getdevstats *cgds = &start_ccb->cgds;
2849                 struct cam_ed *dev = path->device;
2850                 struct cam_eb *bus = path->bus;
2851                 struct cam_et *tar = path->target;
2852                 struct cam_devq *devq = bus->sim->devq;
2853
2854                 mtx_lock(&devq->send_mtx);
2855                 cgds->dev_openings = dev->ccbq.dev_openings;
2856                 cgds->dev_active = dev->ccbq.dev_active;
2857                 cgds->allocated = dev->ccbq.allocated;
2858                 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2859                 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued;
2860                 cgds->last_reset = tar->last_reset;
2861                 cgds->maxtags = dev->maxtags;
2862                 cgds->mintags = dev->mintags;
2863                 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2864                         cgds->last_reset = bus->last_reset;
2865                 mtx_unlock(&devq->send_mtx);
2866                 cgds->ccb_h.status = CAM_REQ_CMP;
2867                 break;
2868         }
2869         case XPT_GDEVLIST:
2870         {
2871                 struct cam_periph       *nperiph;
2872                 struct periph_list      *periph_head;
2873                 struct ccb_getdevlist   *cgdl;
2874                 u_int                   i;
2875                 struct cam_ed           *device;
2876                 int                     found;
2877
2878
2879                 found = 0;
2880
2881                 /*
2882                  * Don't want anyone mucking with our data.
2883                  */
2884                 device = path->device;
2885                 periph_head = &device->periphs;
2886                 cgdl = &start_ccb->cgdl;
2887
2888                 /*
2889                  * Check and see if the list has changed since the user
2890                  * last requested a list member.  If so, tell them that the
2891                  * list has changed, and therefore they need to start over
2892                  * from the beginning.
2893                  */
2894                 if ((cgdl->index != 0) &&
2895                     (cgdl->generation != device->generation)) {
2896                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2897                         break;
2898                 }
2899
2900                 /*
2901                  * Traverse the list of peripherals and attempt to find
2902                  * the requested peripheral.
2903                  */
2904                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2905                      (nperiph != NULL) && (i <= cgdl->index);
2906                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2907                         if (i == cgdl->index) {
2908                                 strncpy(cgdl->periph_name,
2909                                         nperiph->periph_name,
2910                                         DEV_IDLEN);
2911                                 cgdl->unit_number = nperiph->unit_number;
2912                                 found = 1;
2913                         }
2914                 }
2915                 if (found == 0) {
2916                         cgdl->status = CAM_GDEVLIST_ERROR;
2917                         break;
2918                 }
2919
2920                 if (nperiph == NULL)
2921                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2922                 else
2923                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2924
2925                 cgdl->index++;
2926                 cgdl->generation = device->generation;
2927
2928                 cgdl->ccb_h.status = CAM_REQ_CMP;
2929                 break;
2930         }
2931         case XPT_DEV_MATCH:
2932         {
2933                 dev_pos_type position_type;
2934                 struct ccb_dev_match *cdm;
2935
2936                 cdm = &start_ccb->cdm;
2937
2938                 /*
2939                  * There are two ways of getting at information in the EDT.
2940                  * The first way is via the primary EDT tree.  It starts
2941                  * with a list of buses, then a list of targets on a bus,
2942                  * then devices/luns on a target, and then peripherals on a
2943                  * device/lun.  The "other" way is by the peripheral driver
2944                  * lists.  The peripheral driver lists are organized by
2945                  * peripheral driver.  (obviously)  So it makes sense to
2946                  * use the peripheral driver list if the user is looking
2947                  * for something like "da1", or all "da" devices.  If the
2948                  * user is looking for something on a particular bus/target
2949                  * or lun, it's generally better to go through the EDT tree.
2950                  */
2951
2952                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2953                         position_type = cdm->pos.position_type;
2954                 else {
2955                         u_int i;
2956
2957                         position_type = CAM_DEV_POS_NONE;
2958
2959                         for (i = 0; i < cdm->num_patterns; i++) {
2960                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2961                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2962                                         position_type = CAM_DEV_POS_EDT;
2963                                         break;
2964                                 }
2965                         }
2966
2967                         if (cdm->num_patterns == 0)
2968                                 position_type = CAM_DEV_POS_EDT;
2969                         else if (position_type == CAM_DEV_POS_NONE)
2970                                 position_type = CAM_DEV_POS_PDRV;
2971                 }
2972
2973                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2974                 case CAM_DEV_POS_EDT:
2975                         xptedtmatch(cdm);
2976                         break;
2977                 case CAM_DEV_POS_PDRV:
2978                         xptperiphlistmatch(cdm);
2979                         break;
2980                 default:
2981                         cdm->status = CAM_DEV_MATCH_ERROR;
2982                         break;
2983                 }
2984
2985                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2986                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2987                 else
2988                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2989
2990                 break;
2991         }
2992         case XPT_SASYNC_CB:
2993         {
2994                 struct ccb_setasync *csa;
2995                 struct async_node *cur_entry;
2996                 struct async_list *async_head;
2997                 u_int32_t added;
2998
2999                 csa = &start_ccb->csa;
3000                 added = csa->event_enable;
3001                 async_head = &path->device->asyncs;
3002
3003                 /*
3004                  * If there is already an entry for us, simply
3005                  * update it.
3006                  */
3007                 cur_entry = SLIST_FIRST(async_head);
3008                 while (cur_entry != NULL) {
3009                         if ((cur_entry->callback_arg == csa->callback_arg)
3010                          && (cur_entry->callback == csa->callback))
3011                                 break;
3012                         cur_entry = SLIST_NEXT(cur_entry, links);
3013                 }
3014
3015                 if (cur_entry != NULL) {
3016                         /*
3017                          * If the request has no flags set,
3018                          * remove the entry.
3019                          */
3020                         added &= ~cur_entry->event_enable;
3021                         if (csa->event_enable == 0) {
3022                                 SLIST_REMOVE(async_head, cur_entry,
3023                                              async_node, links);
3024                                 xpt_release_device(path->device);
3025                                 free(cur_entry, M_CAMXPT);
3026                         } else {
3027                                 cur_entry->event_enable = csa->event_enable;
3028                         }
3029                         csa->event_enable = added;
3030                 } else {
3031                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3032                                            M_NOWAIT);
3033                         if (cur_entry == NULL) {
3034                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3035                                 break;
3036                         }
3037                         cur_entry->event_enable = csa->event_enable;
3038                         cur_entry->event_lock = (path->bus->sim->mtx &&
3039                             mtx_owned(path->bus->sim->mtx)) ? 1 : 0;
3040                         cur_entry->callback_arg = csa->callback_arg;
3041                         cur_entry->callback = csa->callback;
3042                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3043                         xpt_acquire_device(path->device);
3044                 }
3045                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3046                 break;
3047         }
3048         case XPT_REL_SIMQ:
3049         {
3050                 struct ccb_relsim *crs;
3051                 struct cam_ed *dev;
3052
3053                 crs = &start_ccb->crs;
3054                 dev = path->device;
3055                 if (dev == NULL) {
3056
3057                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3058                         break;
3059                 }
3060
3061                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3062
3063                         /* Don't ever go below one opening */
3064                         if (crs->openings > 0) {
3065                                 xpt_dev_ccbq_resize(path, crs->openings);
3066                                 if (bootverbose) {
3067                                         xpt_print(path,
3068                                             "number of openings is now %d\n",
3069                                             crs->openings);
3070                                 }
3071                         }
3072                 }
3073
3074                 mtx_lock(&dev->sim->devq->send_mtx);
3075                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3076
3077                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3078
3079                                 /*
3080                                  * Just extend the old timeout and decrement
3081                                  * the freeze count so that a single timeout
3082                                  * is sufficient for releasing the queue.
3083                                  */
3084                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3085                                 callout_stop(&dev->callout);
3086                         } else {
3087
3088                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3089                         }
3090
3091                         callout_reset_sbt(&dev->callout,
3092                             SBT_1MS * crs->release_timeout, 0,
3093                             xpt_release_devq_timeout, dev, 0);
3094
3095                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3096
3097                 }
3098
3099                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3100
3101                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3102                                 /*
3103                                  * Decrement the freeze count so that a single
3104                                  * completion is still sufficient to unfreeze
3105                                  * the queue.
3106                                  */
3107                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3108                         } else {
3109
3110                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3111                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3112                         }
3113                 }
3114
3115                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3116
3117                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3118                          || (dev->ccbq.dev_active == 0)) {
3119
3120                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3121                         } else {
3122
3123                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3124                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3125                         }
3126                 }
3127                 mtx_unlock(&dev->sim->devq->send_mtx);
3128
3129                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3130                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3131                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3132                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3133                 break;
3134         }
3135         case XPT_DEBUG: {
3136                 struct cam_path *oldpath;
3137
3138                 /* Check that all request bits are supported. */
3139                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3140                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3141                         break;
3142                 }
3143
3144                 cam_dflags = CAM_DEBUG_NONE;
3145                 if (cam_dpath != NULL) {
3146                         oldpath = cam_dpath;
3147                         cam_dpath = NULL;
3148                         xpt_free_path(oldpath);
3149                 }
3150                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3151                         if (xpt_create_path(&cam_dpath, NULL,
3152                                             start_ccb->ccb_h.path_id,
3153                                             start_ccb->ccb_h.target_id,
3154                                             start_ccb->ccb_h.target_lun) !=
3155                                             CAM_REQ_CMP) {
3156                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3157                         } else {
3158                                 cam_dflags = start_ccb->cdbg.flags;
3159                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3160                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3161                                     cam_dflags);
3162                         }
3163                 } else
3164                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3165                 break;
3166         }
3167         case XPT_NOOP:
3168                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3169                         xpt_freeze_devq(path, 1);
3170                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3171                 break;
3172         case XPT_REPROBE_LUN:
3173                 xpt_async(AC_INQ_CHANGED, path, NULL);
3174                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3175                 xpt_done(start_ccb);
3176                 break;
3177         default:
3178         case XPT_SDEV_TYPE:
3179         case XPT_TERM_IO:
3180         case XPT_ENG_INQ:
3181                 /* XXX Implement */
3182                 xpt_print(start_ccb->ccb_h.path,
3183                     "%s: CCB type %#x %s not supported\n", __func__,
3184                     start_ccb->ccb_h.func_code,
3185                     xpt_action_name(start_ccb->ccb_h.func_code));
3186                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3187                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3188                         xpt_done(start_ccb);
3189                 }
3190                 break;
3191         }
3192         CAM_DEBUG(path, CAM_DEBUG_TRACE,
3193             ("xpt_action_default: func= %#x %s status %#x\n",
3194                 start_ccb->ccb_h.func_code,
3195                 xpt_action_name(start_ccb->ccb_h.func_code),
3196                 start_ccb->ccb_h.status));
3197 }
3198
3199 void
3200 xpt_polled_action(union ccb *start_ccb)
3201 {
3202         u_int32_t timeout;
3203         struct    cam_sim *sim;
3204         struct    cam_devq *devq;
3205         struct    cam_ed *dev;
3206         struct mtx *mtx;
3207
3208         timeout = start_ccb->ccb_h.timeout * 10;
3209         sim = start_ccb->ccb_h.path->bus->sim;
3210         devq = sim->devq;
3211         mtx = sim->mtx;
3212         dev = start_ccb->ccb_h.path->device;
3213
3214         mtx_unlock(&dev->device_mtx);
3215
3216         /*
3217          * Steal an opening so that no other queued requests
3218          * can get it before us while we simulate interrupts.
3219          */
3220         mtx_lock(&devq->send_mtx);
3221         dev->ccbq.dev_openings--;
3222         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3223             (--timeout > 0)) {
3224                 mtx_unlock(&devq->send_mtx);
3225                 DELAY(100);
3226                 if (mtx)
3227                         mtx_lock(mtx);
3228                 (*(sim->sim_poll))(sim);
3229                 if (mtx)
3230                         mtx_unlock(mtx);
3231                 camisr_runqueue();
3232                 mtx_lock(&devq->send_mtx);
3233         }
3234         dev->ccbq.dev_openings++;
3235         mtx_unlock(&devq->send_mtx);
3236
3237         if (timeout != 0) {
3238                 xpt_action(start_ccb);
3239                 while(--timeout > 0) {
3240                         if (mtx)
3241                                 mtx_lock(mtx);
3242                         (*(sim->sim_poll))(sim);
3243                         if (mtx)
3244                                 mtx_unlock(mtx);
3245                         camisr_runqueue();
3246                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3247                             != CAM_REQ_INPROG)
3248                                 break;
3249                         DELAY(100);
3250                 }
3251                 if (timeout == 0) {
3252                         /*
3253                          * XXX Is it worth adding a sim_timeout entry
3254                          * point so we can attempt recovery?  If
3255                          * this is only used for dumps, I don't think
3256                          * it is.
3257                          */
3258                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3259                 }
3260         } else {
3261                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3262         }
3263
3264         mtx_lock(&dev->device_mtx);
3265 }
3266
3267 /*
3268  * Schedule a peripheral driver to receive a ccb when its
3269  * target device has space for more transactions.
3270  */
3271 void
3272 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3273 {
3274
3275         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3276         cam_periph_assert(periph, MA_OWNED);
3277         if (new_priority < periph->scheduled_priority) {
3278                 periph->scheduled_priority = new_priority;
3279                 xpt_run_allocq(periph, 0);
3280         }
3281 }
3282
3283
3284 /*
3285  * Schedule a device to run on a given queue.
3286  * If the device was inserted as a new entry on the queue,
3287  * return 1 meaning the device queue should be run. If we
3288  * were already queued, implying someone else has already
3289  * started the queue, return 0 so the caller doesn't attempt
3290  * to run the queue.
3291  */
3292 static int
3293 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3294                  u_int32_t new_priority)
3295 {
3296         int retval;
3297         u_int32_t old_priority;
3298
3299         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3300
3301         old_priority = pinfo->priority;
3302
3303         /*
3304          * Are we already queued?
3305          */
3306         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3307                 /* Simply reorder based on new priority */
3308                 if (new_priority < old_priority) {
3309                         camq_change_priority(queue, pinfo->index,
3310                                              new_priority);
3311                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3312                                         ("changed priority to %d\n",
3313                                          new_priority));
3314                         retval = 1;
3315                 } else
3316                         retval = 0;
3317         } else {
3318                 /* New entry on the queue */
3319                 if (new_priority < old_priority)
3320                         pinfo->priority = new_priority;
3321
3322                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3323                                 ("Inserting onto queue\n"));
3324                 pinfo->generation = ++queue->generation;
3325                 camq_insert(queue, pinfo);
3326                 retval = 1;
3327         }
3328         return (retval);
3329 }
3330
3331 static void
3332 xpt_run_allocq_task(void *context, int pending)
3333 {
3334         struct cam_periph *periph = context;
3335
3336         cam_periph_lock(periph);
3337         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3338         xpt_run_allocq(periph, 1);
3339         cam_periph_unlock(periph);
3340         cam_periph_release(periph);
3341 }
3342
3343 static void
3344 xpt_run_allocq(struct cam_periph *periph, int sleep)
3345 {
3346         struct cam_ed   *device;
3347         union ccb       *ccb;
3348         uint32_t         prio;
3349
3350         cam_periph_assert(periph, MA_OWNED);
3351         if (periph->periph_allocating)
3352                 return;
3353         periph->periph_allocating = 1;
3354         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3355         device = periph->path->device;
3356         ccb = NULL;
3357 restart:
3358         while ((prio = min(periph->scheduled_priority,
3359             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3360             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3361              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3362
3363                 if (ccb == NULL &&
3364                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3365                         if (sleep) {
3366                                 ccb = xpt_get_ccb(periph);
3367                                 goto restart;
3368                         }
3369                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3370                                 break;
3371                         cam_periph_doacquire(periph);
3372                         periph->flags |= CAM_PERIPH_RUN_TASK;
3373                         taskqueue_enqueue(xsoftc.xpt_taskq,
3374                             &periph->periph_run_task);
3375                         break;
3376                 }
3377                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3378                 if (prio == periph->immediate_priority) {
3379                         periph->immediate_priority = CAM_PRIORITY_NONE;
3380                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3381                                         ("waking cam_periph_getccb()\n"));
3382                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3383                                           periph_links.sle);
3384                         wakeup(&periph->ccb_list);
3385                 } else {
3386                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3387                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3388                                         ("calling periph_start()\n"));
3389                         periph->periph_start(periph, ccb);
3390                 }
3391                 ccb = NULL;
3392         }
3393         if (ccb != NULL)
3394                 xpt_release_ccb(ccb);
3395         periph->periph_allocating = 0;
3396 }
3397
3398 static void
3399 xpt_run_devq(struct cam_devq *devq)
3400 {
3401         struct mtx *mtx;
3402
3403         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3404
3405         devq->send_queue.qfrozen_cnt++;
3406         while ((devq->send_queue.entries > 0)
3407             && (devq->send_openings > 0)
3408             && (devq->send_queue.qfrozen_cnt <= 1)) {
3409                 struct  cam_ed *device;
3410                 union ccb *work_ccb;
3411                 struct  cam_sim *sim;
3412                 struct xpt_proto *proto;
3413
3414                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3415                                                            CAMQ_HEAD);
3416                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3417                                 ("running device %p\n", device));
3418
3419                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3420                 if (work_ccb == NULL) {
3421                         printf("device on run queue with no ccbs???\n");
3422                         continue;
3423                 }
3424
3425                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3426
3427                         mtx_lock(&xsoftc.xpt_highpower_lock);
3428                         if (xsoftc.num_highpower <= 0) {
3429                                 /*
3430                                  * We got a high power command, but we
3431                                  * don't have any available slots.  Freeze
3432                                  * the device queue until we have a slot
3433                                  * available.
3434                                  */
3435                                 xpt_freeze_devq_device(device, 1);
3436                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3437                                                    highpowerq_entry);
3438
3439                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3440                                 continue;
3441                         } else {
3442                                 /*
3443                                  * Consume a high power slot while
3444                                  * this ccb runs.
3445                                  */
3446                                 xsoftc.num_highpower--;
3447                         }
3448                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3449                 }
3450                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3451                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3452                 devq->send_openings--;
3453                 devq->send_active++;
3454                 xpt_schedule_devq(devq, device);
3455                 mtx_unlock(&devq->send_mtx);
3456
3457                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3458                         /*
3459                          * The client wants to freeze the queue
3460                          * after this CCB is sent.
3461                          */
3462                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3463                 }
3464
3465                 /* In Target mode, the peripheral driver knows best... */
3466                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3467                         if ((device->inq_flags & SID_CmdQue) != 0
3468                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3469                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3470                         else
3471                                 /*
3472                                  * Clear this in case of a retried CCB that
3473                                  * failed due to a rejected tag.
3474                                  */
3475                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3476                 }
3477
3478                 KASSERT(device == work_ccb->ccb_h.path->device,
3479                     ("device (%p) / path->device (%p) mismatch",
3480                         device, work_ccb->ccb_h.path->device));
3481                 proto = xpt_proto_find(device->protocol);
3482                 if (proto && proto->ops->debug_out)
3483                         proto->ops->debug_out(work_ccb);
3484
3485                 /*
3486                  * Device queues can be shared among multiple SIM instances
3487                  * that reside on different buses.  Use the SIM from the
3488                  * queued device, rather than the one from the calling bus.
3489                  */
3490                 sim = device->sim;
3491                 mtx = sim->mtx;
3492                 if (mtx && !mtx_owned(mtx))
3493                         mtx_lock(mtx);
3494                 else
3495                         mtx = NULL;
3496                 work_ccb->ccb_h.qos.periph_data = cam_iosched_now();
3497                 (*(sim->sim_action))(sim, work_ccb);
3498                 if (mtx)
3499                         mtx_unlock(mtx);
3500                 mtx_lock(&devq->send_mtx);
3501         }
3502         devq->send_queue.qfrozen_cnt--;
3503 }
3504
3505 /*
3506  * This function merges stuff from the slave ccb into the master ccb, while
3507  * keeping important fields in the master ccb constant.
3508  */
3509 void
3510 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3511 {
3512
3513         /*
3514          * Pull fields that are valid for peripheral drivers to set
3515          * into the master CCB along with the CCB "payload".
3516          */
3517         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3518         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3519         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3520         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3521         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3522               sizeof(union ccb) - sizeof(struct ccb_hdr));
3523 }
3524
3525 void
3526 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3527                     u_int32_t priority, u_int32_t flags)
3528 {
3529
3530         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3531         ccb_h->pinfo.priority = priority;
3532         ccb_h->path = path;
3533         ccb_h->path_id = path->bus->path_id;
3534         if (path->target)
3535                 ccb_h->target_id = path->target->target_id;
3536         else
3537                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3538         if (path->device) {
3539                 ccb_h->target_lun = path->device->lun_id;
3540                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3541         } else {
3542                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3543         }
3544         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3545         ccb_h->flags = flags;
3546         ccb_h->xflags = 0;
3547 }
3548
3549 void
3550 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3551 {
3552         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3553 }
3554
3555 /* Path manipulation functions */
3556 cam_status
3557 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3558                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3559 {
3560         struct     cam_path *path;
3561         cam_status status;
3562
3563         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3564
3565         if (path == NULL) {
3566                 status = CAM_RESRC_UNAVAIL;
3567                 return(status);
3568         }
3569         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3570         if (status != CAM_REQ_CMP) {
3571                 free(path, M_CAMPATH);
3572                 path = NULL;
3573         }
3574         *new_path_ptr = path;
3575         return (status);
3576 }
3577
3578 cam_status
3579 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3580                          struct cam_periph *periph, path_id_t path_id,
3581                          target_id_t target_id, lun_id_t lun_id)
3582 {
3583
3584         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3585             lun_id));
3586 }
3587
3588 cam_status
3589 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3590                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3591 {
3592         struct       cam_eb *bus;
3593         struct       cam_et *target;
3594         struct       cam_ed *device;
3595         cam_status   status;
3596
3597         status = CAM_REQ_CMP;   /* Completed without error */
3598         target = NULL;          /* Wildcarded */
3599         device = NULL;          /* Wildcarded */
3600
3601         /*
3602          * We will potentially modify the EDT, so block interrupts
3603          * that may attempt to create cam paths.
3604          */
3605         bus = xpt_find_bus(path_id);
3606         if (bus == NULL) {
3607                 status = CAM_PATH_INVALID;
3608         } else {
3609                 xpt_lock_buses();
3610                 mtx_lock(&bus->eb_mtx);
3611                 target = xpt_find_target(bus, target_id);
3612                 if (target == NULL) {
3613                         /* Create one */
3614                         struct cam_et *new_target;
3615
3616                         new_target = xpt_alloc_target(bus, target_id);
3617                         if (new_target == NULL) {
3618                                 status = CAM_RESRC_UNAVAIL;
3619                         } else {
3620                                 target = new_target;
3621                         }
3622                 }
3623                 xpt_unlock_buses();
3624                 if (target != NULL) {
3625                         device = xpt_find_device(target, lun_id);
3626                         if (device == NULL) {
3627                                 /* Create one */
3628                                 struct cam_ed *new_device;
3629
3630                                 new_device =
3631                                     (*(bus->xport->ops->alloc_device))(bus,
3632                                                                        target,
3633                                                                        lun_id);
3634                                 if (new_device == NULL) {
3635                                         status = CAM_RESRC_UNAVAIL;
3636                                 } else {
3637                                         device = new_device;
3638                                 }
3639                         }
3640                 }
3641                 mtx_unlock(&bus->eb_mtx);
3642         }
3643
3644         /*
3645          * Only touch the user's data if we are successful.
3646          */
3647         if (status == CAM_REQ_CMP) {
3648                 new_path->periph = perph;
3649                 new_path->bus = bus;
3650                 new_path->target = target;
3651                 new_path->device = device;
3652                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3653         } else {
3654                 if (device != NULL)
3655                         xpt_release_device(device);
3656                 if (target != NULL)
3657                         xpt_release_target(target);
3658                 if (bus != NULL)
3659                         xpt_release_bus(bus);
3660         }
3661         return (status);
3662 }
3663
3664 cam_status
3665 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3666 {
3667         struct     cam_path *new_path;
3668
3669         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3670         if (new_path == NULL)
3671                 return(CAM_RESRC_UNAVAIL);
3672         xpt_copy_path(new_path, path);
3673         *new_path_ptr = new_path;
3674         return (CAM_REQ_CMP);
3675 }
3676
3677 void
3678 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3679 {
3680
3681         *new_path = *path;
3682         if (path->bus != NULL)
3683                 xpt_acquire_bus(path->bus);
3684         if (path->target != NULL)
3685                 xpt_acquire_target(path->target);
3686         if (path->device != NULL)
3687                 xpt_acquire_device(path->device);
3688 }
3689
3690 void
3691 xpt_release_path(struct cam_path *path)
3692 {
3693         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3694         if (path->device != NULL) {
3695                 xpt_release_device(path->device);
3696                 path->device = NULL;
3697         }
3698         if (path->target != NULL) {
3699                 xpt_release_target(path->target);
3700                 path->target = NULL;
3701         }
3702         if (path->bus != NULL) {
3703                 xpt_release_bus(path->bus);
3704                 path->bus = NULL;
3705         }
3706 }
3707
3708 void
3709 xpt_free_path(struct cam_path *path)
3710 {
3711
3712         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3713         xpt_release_path(path);
3714         free(path, M_CAMPATH);
3715 }
3716
3717 void
3718 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3719     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3720 {
3721
3722         xpt_lock_buses();
3723         if (bus_ref) {
3724                 if (path->bus)
3725                         *bus_ref = path->bus->refcount;
3726                 else
3727                         *bus_ref = 0;
3728         }
3729         if (periph_ref) {
3730                 if (path->periph)
3731                         *periph_ref = path->periph->refcount;
3732                 else
3733                         *periph_ref = 0;
3734         }
3735         xpt_unlock_buses();
3736         if (target_ref) {
3737                 if (path->target)
3738                         *target_ref = path->target->refcount;
3739                 else
3740                         *target_ref = 0;
3741         }
3742         if (device_ref) {
3743                 if (path->device)
3744                         *device_ref = path->device->refcount;
3745                 else
3746                         *device_ref = 0;
3747         }
3748 }
3749
3750 /*
3751  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3752  * in path1, 2 for match with wildcards in path2.
3753  */
3754 int
3755 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3756 {
3757         int retval = 0;
3758
3759         if (path1->bus != path2->bus) {
3760                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3761                         retval = 1;
3762                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3763                         retval = 2;
3764                 else
3765                         return (-1);
3766         }
3767         if (path1->target != path2->target) {
3768                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3769                         if (retval == 0)
3770                                 retval = 1;
3771                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3772                         retval = 2;
3773                 else
3774                         return (-1);
3775         }
3776         if (path1->device != path2->device) {
3777                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3778                         if (retval == 0)
3779                                 retval = 1;
3780                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3781                         retval = 2;
3782                 else
3783                         return (-1);
3784         }
3785         return (retval);
3786 }
3787
3788 int
3789 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3790 {
3791         int retval = 0;
3792
3793         if (path->bus != dev->target->bus) {
3794                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3795                         retval = 1;
3796                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3797                         retval = 2;
3798                 else
3799                         return (-1);
3800         }
3801         if (path->target != dev->target) {
3802                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3803                         if (retval == 0)
3804                                 retval = 1;
3805                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3806                         retval = 2;
3807                 else
3808                         return (-1);
3809         }
3810         if (path->device != dev) {
3811                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3812                         if (retval == 0)
3813                                 retval = 1;
3814                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3815                         retval = 2;
3816                 else
3817                         return (-1);
3818         }
3819         return (retval);
3820 }
3821
3822 void
3823 xpt_print_path(struct cam_path *path)
3824 {
3825         struct sbuf sb;
3826         char buffer[XPT_PRINT_LEN];
3827
3828         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3829         xpt_path_sbuf(path, &sb);
3830         sbuf_finish(&sb);
3831         printf("%s", sbuf_data(&sb));
3832         sbuf_delete(&sb);
3833 }
3834
3835 void
3836 xpt_print_device(struct cam_ed *device)
3837 {
3838
3839         if (device == NULL)
3840                 printf("(nopath): ");
3841         else {
3842                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3843                        device->sim->unit_number,
3844                        device->sim->bus_id,
3845                        device->target->target_id,
3846                        (uintmax_t)device->lun_id);
3847         }
3848 }
3849
3850 void
3851 xpt_print(struct cam_path *path, const char *fmt, ...)
3852 {
3853         va_list ap;
3854         struct sbuf sb;
3855         char buffer[XPT_PRINT_LEN];
3856
3857         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3858
3859         xpt_path_sbuf(path, &sb);
3860         va_start(ap, fmt);
3861         sbuf_vprintf(&sb, fmt, ap);
3862         va_end(ap);
3863
3864         sbuf_finish(&sb);
3865         printf("%s", sbuf_data(&sb));
3866         sbuf_delete(&sb);
3867 }
3868
3869 int
3870 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3871 {
3872         struct sbuf sb;
3873         int len;
3874
3875         sbuf_new(&sb, str, str_len, 0);
3876         len = xpt_path_sbuf(path, &sb);
3877         sbuf_finish(&sb);
3878         return (len);
3879 }
3880
3881 int
3882 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb)
3883 {
3884
3885         if (path == NULL)
3886                 sbuf_printf(sb, "(nopath): ");
3887         else {
3888                 if (path->periph != NULL)
3889                         sbuf_printf(sb, "(%s%d:", path->periph->periph_name,
3890                                     path->periph->unit_number);
3891                 else
3892                         sbuf_printf(sb, "(noperiph:");
3893
3894                 if (path->bus != NULL)
3895                         sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name,
3896                                     path->bus->sim->unit_number,
3897                                     path->bus->sim->bus_id);
3898                 else
3899                         sbuf_printf(sb, "nobus:");
3900
3901                 if (path->target != NULL)
3902                         sbuf_printf(sb, "%d:", path->target->target_id);
3903                 else
3904                         sbuf_printf(sb, "X:");
3905
3906                 if (path->device != NULL)
3907                         sbuf_printf(sb, "%jx): ",
3908                             (uintmax_t)path->device->lun_id);
3909                 else
3910                         sbuf_printf(sb, "X): ");
3911         }
3912
3913         return(sbuf_len(sb));
3914 }
3915
3916 path_id_t
3917 xpt_path_path_id(struct cam_path *path)
3918 {
3919         return(path->bus->path_id);
3920 }
3921
3922 target_id_t
3923 xpt_path_target_id(struct cam_path *path)
3924 {
3925         if (path->target != NULL)
3926                 return (path->target->target_id);
3927         else
3928                 return (CAM_TARGET_WILDCARD);
3929 }
3930
3931 lun_id_t
3932 xpt_path_lun_id(struct cam_path *path)
3933 {
3934         if (path->device != NULL)
3935                 return (path->device->lun_id);
3936         else
3937                 return (CAM_LUN_WILDCARD);
3938 }
3939
3940 struct cam_sim *
3941 xpt_path_sim(struct cam_path *path)
3942 {
3943
3944         return (path->bus->sim);
3945 }
3946
3947 struct cam_periph*
3948 xpt_path_periph(struct cam_path *path)
3949 {
3950
3951         return (path->periph);
3952 }
3953
3954 /*
3955  * Release a CAM control block for the caller.  Remit the cost of the structure
3956  * to the device referenced by the path.  If the this device had no 'credits'
3957  * and peripheral drivers have registered async callbacks for this notification
3958  * call them now.
3959  */
3960 void
3961 xpt_release_ccb(union ccb *free_ccb)
3962 {
3963         struct   cam_ed *device;
3964         struct   cam_periph *periph;
3965
3966         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3967         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3968         device = free_ccb->ccb_h.path->device;
3969         periph = free_ccb->ccb_h.path->periph;
3970
3971         xpt_free_ccb(free_ccb);
3972         periph->periph_allocated--;
3973         cam_ccbq_release_opening(&device->ccbq);
3974         xpt_run_allocq(periph, 0);
3975 }
3976
3977 /* Functions accessed by SIM drivers */
3978
3979 static struct xpt_xport_ops xport_default_ops = {
3980         .alloc_device = xpt_alloc_device_default,
3981         .action = xpt_action_default,
3982         .async = xpt_dev_async_default,
3983 };
3984 static struct xpt_xport xport_default = {
3985         .xport = XPORT_UNKNOWN,
3986         .name = "unknown",
3987         .ops = &xport_default_ops,
3988 };
3989
3990 CAM_XPT_XPORT(xport_default);
3991
3992 /*
3993  * A sim structure, listing the SIM entry points and instance
3994  * identification info is passed to xpt_bus_register to hook the SIM
3995  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
3996  * for this new bus and places it in the array of buses and assigns
3997  * it a path_id.  The path_id may be influenced by "hard wiring"
3998  * information specified by the user.  Once interrupt services are
3999  * available, the bus will be probed.
4000  */
4001 int32_t
4002 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
4003 {
4004         struct cam_eb *new_bus;
4005         struct cam_eb *old_bus;
4006         struct ccb_pathinq cpi;
4007         struct cam_path *path;
4008         cam_status status;
4009
4010         sim->bus_id = bus;
4011         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4012                                           M_CAMXPT, M_NOWAIT|M_ZERO);
4013         if (new_bus == NULL) {
4014                 /* Couldn't satisfy request */
4015                 return (CAM_RESRC_UNAVAIL);
4016         }
4017
4018         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
4019         TAILQ_INIT(&new_bus->et_entries);
4020         cam_sim_hold(sim);
4021         new_bus->sim = sim;
4022         timevalclear(&new_bus->last_reset);
4023         new_bus->flags = 0;
4024         new_bus->refcount = 1;  /* Held until a bus_deregister event */
4025         new_bus->generation = 0;
4026
4027         xpt_lock_buses();
4028         sim->path_id = new_bus->path_id =
4029             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4030         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4031         while (old_bus != NULL
4032             && old_bus->path_id < new_bus->path_id)
4033                 old_bus = TAILQ_NEXT(old_bus, links);
4034         if (old_bus != NULL)
4035                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4036         else
4037                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
4038         xsoftc.bus_generation++;
4039         xpt_unlock_buses();
4040
4041         /*
4042          * Set a default transport so that a PATH_INQ can be issued to
4043          * the SIM.  This will then allow for probing and attaching of
4044          * a more appropriate transport.
4045          */
4046         new_bus->xport = &xport_default;
4047
4048         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
4049                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4050         if (status != CAM_REQ_CMP) {
4051                 xpt_release_bus(new_bus);
4052                 free(path, M_CAMXPT);
4053                 return (CAM_RESRC_UNAVAIL);
4054         }
4055
4056         xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
4057         cpi.ccb_h.func_code = XPT_PATH_INQ;
4058         xpt_action((union ccb *)&cpi);
4059
4060         if (cpi.ccb_h.status == CAM_REQ_CMP) {
4061                 struct xpt_xport **xpt;
4062
4063                 SET_FOREACH(xpt, cam_xpt_xport_set) {
4064                         if ((*xpt)->xport == cpi.transport) {
4065                                 new_bus->xport = *xpt;
4066                                 break;
4067                         }
4068                 }
4069                 if (new_bus->xport == NULL) {
4070                         xpt_print(path,
4071                             "No transport found for %d\n", cpi.transport);
4072                         xpt_release_bus(new_bus);
4073                         free(path, M_CAMXPT);
4074                         return (CAM_RESRC_UNAVAIL);
4075                 }
4076         }
4077
4078         /* Notify interested parties */
4079         if (sim->path_id != CAM_XPT_PATH_ID) {
4080
4081                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
4082                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
4083                         union   ccb *scan_ccb;
4084
4085                         /* Initiate bus rescan. */
4086                         scan_ccb = xpt_alloc_ccb_nowait();
4087                         if (scan_ccb != NULL) {
4088                                 scan_ccb->ccb_h.path = path;
4089                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
4090                                 scan_ccb->crcn.flags = 0;
4091                                 xpt_rescan(scan_ccb);
4092                         } else {
4093                                 xpt_print(path,
4094                                           "Can't allocate CCB to scan bus\n");
4095                                 xpt_free_path(path);
4096                         }
4097                 } else
4098                         xpt_free_path(path);
4099         } else
4100                 xpt_free_path(path);
4101         return (CAM_SUCCESS);
4102 }
4103
4104 int32_t
4105 xpt_bus_deregister(path_id_t pathid)
4106 {
4107         struct cam_path bus_path;
4108         cam_status status;
4109
4110         status = xpt_compile_path(&bus_path, NULL, pathid,
4111                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4112         if (status != CAM_REQ_CMP)
4113                 return (status);
4114
4115         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4116         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4117
4118         /* Release the reference count held while registered. */
4119         xpt_release_bus(bus_path.bus);
4120         xpt_release_path(&bus_path);
4121
4122         return (CAM_REQ_CMP);
4123 }
4124
4125 static path_id_t
4126 xptnextfreepathid(void)
4127 {
4128         struct cam_eb *bus;
4129         path_id_t pathid;
4130         const char *strval;
4131
4132         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4133         pathid = 0;
4134         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4135 retry:
4136         /* Find an unoccupied pathid */
4137         while (bus != NULL && bus->path_id <= pathid) {
4138                 if (bus->path_id == pathid)
4139                         pathid++;
4140                 bus = TAILQ_NEXT(bus, links);
4141         }
4142
4143         /*
4144          * Ensure that this pathid is not reserved for
4145          * a bus that may be registered in the future.
4146          */
4147         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4148                 ++pathid;
4149                 /* Start the search over */
4150                 goto retry;
4151         }
4152         return (pathid);
4153 }
4154
4155 static path_id_t
4156 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4157 {
4158         path_id_t pathid;
4159         int i, dunit, val;
4160         char buf[32];
4161         const char *dname;
4162
4163         pathid = CAM_XPT_PATH_ID;
4164         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4165         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4166                 return (pathid);
4167         i = 0;
4168         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4169                 if (strcmp(dname, "scbus")) {
4170                         /* Avoid a bit of foot shooting. */
4171                         continue;
4172                 }
4173                 if (dunit < 0)          /* unwired?! */
4174                         continue;
4175                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4176                         if (sim_bus == val) {
4177                                 pathid = dunit;
4178                                 break;
4179                         }
4180                 } else if (sim_bus == 0) {
4181                         /* Unspecified matches bus 0 */
4182                         pathid = dunit;
4183                         break;
4184                 } else {
4185                         printf("Ambiguous scbus configuration for %s%d "
4186                                "bus %d, cannot wire down.  The kernel "
4187                                "config entry for scbus%d should "
4188                                "specify a controller bus.\n"
4189                                "Scbus will be assigned dynamically.\n",
4190                                sim_name, sim_unit, sim_bus, dunit);
4191                         break;
4192                 }
4193         }
4194
4195         if (pathid == CAM_XPT_PATH_ID)
4196                 pathid = xptnextfreepathid();
4197         return (pathid);
4198 }
4199
4200 static const char *
4201 xpt_async_string(u_int32_t async_code)
4202 {
4203
4204         switch (async_code) {
4205         case AC_BUS_RESET: return ("AC_BUS_RESET");
4206         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4207         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4208         case AC_SENT_BDR: return ("AC_SENT_BDR");
4209         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4210         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4211         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4212         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4213         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4214         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4215         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4216         case AC_CONTRACT: return ("AC_CONTRACT");
4217         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4218         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4219         }
4220         return ("AC_UNKNOWN");
4221 }
4222
4223 static int
4224 xpt_async_size(u_int32_t async_code)
4225 {
4226
4227         switch (async_code) {
4228         case AC_BUS_RESET: return (0);
4229         case AC_UNSOL_RESEL: return (0);
4230         case AC_SCSI_AEN: return (0);
4231         case AC_SENT_BDR: return (0);
4232         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4233         case AC_PATH_DEREGISTERED: return (0);
4234         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4235         case AC_LOST_DEVICE: return (0);
4236         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4237         case AC_INQ_CHANGED: return (0);
4238         case AC_GETDEV_CHANGED: return (0);
4239         case AC_CONTRACT: return (sizeof(struct ac_contract));
4240         case AC_ADVINFO_CHANGED: return (-1);
4241         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4242         }
4243         return (0);
4244 }
4245
4246 static int
4247 xpt_async_process_dev(struct cam_ed *device, void *arg)
4248 {
4249         union ccb *ccb = arg;
4250         struct cam_path *path = ccb->ccb_h.path;
4251         void *async_arg = ccb->casync.async_arg_ptr;
4252         u_int32_t async_code = ccb->casync.async_code;
4253         int relock;
4254
4255         if (path->device != device
4256          && path->device->lun_id != CAM_LUN_WILDCARD
4257          && device->lun_id != CAM_LUN_WILDCARD)
4258                 return (1);
4259
4260         /*
4261          * The async callback could free the device.
4262          * If it is a broadcast async, it doesn't hold
4263          * device reference, so take our own reference.
4264          */
4265         xpt_acquire_device(device);
4266
4267         /*
4268          * If async for specific device is to be delivered to
4269          * the wildcard client, take the specific device lock.
4270          * XXX: We may need a way for client to specify it.
4271          */
4272         if ((device->lun_id == CAM_LUN_WILDCARD &&
4273              path->device->lun_id != CAM_LUN_WILDCARD) ||
4274             (device->target->target_id == CAM_TARGET_WILDCARD &&
4275              path->target->target_id != CAM_TARGET_WILDCARD) ||
4276             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4277              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4278                 mtx_unlock(&device->device_mtx);
4279                 xpt_path_lock(path);
4280                 relock = 1;
4281         } else
4282                 relock = 0;
4283
4284         (*(device->target->bus->xport->ops->async))(async_code,
4285             device->target->bus, device->target, device, async_arg);
4286         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4287
4288         if (relock) {
4289                 xpt_path_unlock(path);
4290                 mtx_lock(&device->device_mtx);
4291         }
4292         xpt_release_device(device);
4293         return (1);
4294 }
4295
4296 static int
4297 xpt_async_process_tgt(struct cam_et *target, void *arg)
4298 {
4299         union ccb *ccb = arg;
4300         struct cam_path *path = ccb->ccb_h.path;
4301
4302         if (path->target != target
4303          && path->target->target_id != CAM_TARGET_WILDCARD
4304          && target->target_id != CAM_TARGET_WILDCARD)
4305                 return (1);
4306
4307         if (ccb->casync.async_code == AC_SENT_BDR) {
4308                 /* Update our notion of when the last reset occurred */
4309                 microtime(&target->last_reset);
4310         }
4311
4312         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4313 }
4314
4315 static void
4316 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4317 {
4318         struct cam_eb *bus;
4319         struct cam_path *path;
4320         void *async_arg;
4321         u_int32_t async_code;
4322
4323         path = ccb->ccb_h.path;
4324         async_code = ccb->casync.async_code;
4325         async_arg = ccb->casync.async_arg_ptr;
4326         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4327             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4328         bus = path->bus;
4329
4330         if (async_code == AC_BUS_RESET) {
4331                 /* Update our notion of when the last reset occurred */
4332                 microtime(&bus->last_reset);
4333         }
4334
4335         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4336
4337         /*
4338          * If this wasn't a fully wildcarded async, tell all
4339          * clients that want all async events.
4340          */
4341         if (bus != xpt_periph->path->bus) {
4342                 xpt_path_lock(xpt_periph->path);
4343                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4344                 xpt_path_unlock(xpt_periph->path);
4345         }
4346
4347         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4348                 xpt_release_devq(path, 1, TRUE);
4349         else
4350                 xpt_release_simq(path->bus->sim, TRUE);
4351         if (ccb->casync.async_arg_size > 0)
4352                 free(async_arg, M_CAMXPT);
4353         xpt_free_path(path);
4354         xpt_free_ccb(ccb);
4355 }
4356
4357 static void
4358 xpt_async_bcast(struct async_list *async_head,
4359                 u_int32_t async_code,
4360                 struct cam_path *path, void *async_arg)
4361 {
4362         struct async_node *cur_entry;
4363         struct mtx *mtx;
4364
4365         cur_entry = SLIST_FIRST(async_head);
4366         while (cur_entry != NULL) {
4367                 struct async_node *next_entry;
4368                 /*
4369                  * Grab the next list entry before we call the current
4370                  * entry's callback.  This is because the callback function
4371                  * can delete its async callback entry.
4372                  */
4373                 next_entry = SLIST_NEXT(cur_entry, links);
4374                 if ((cur_entry->event_enable & async_code) != 0) {
4375                         mtx = cur_entry->event_lock ?
4376                             path->device->sim->mtx : NULL;
4377                         if (mtx)
4378                                 mtx_lock(mtx);
4379                         cur_entry->callback(cur_entry->callback_arg,
4380                                             async_code, path,
4381                                             async_arg);
4382                         if (mtx)
4383                                 mtx_unlock(mtx);
4384                 }
4385                 cur_entry = next_entry;
4386         }
4387 }
4388
4389 void
4390 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4391 {
4392         union ccb *ccb;
4393         int size;
4394
4395         ccb = xpt_alloc_ccb_nowait();
4396         if (ccb == NULL) {
4397                 xpt_print(path, "Can't allocate CCB to send %s\n",
4398                     xpt_async_string(async_code));
4399                 return;
4400         }
4401
4402         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4403                 xpt_print(path, "Can't allocate path to send %s\n",
4404                     xpt_async_string(async_code));
4405                 xpt_free_ccb(ccb);
4406                 return;
4407         }
4408         ccb->ccb_h.path->periph = NULL;
4409         ccb->ccb_h.func_code = XPT_ASYNC;
4410         ccb->ccb_h.cbfcnp = xpt_async_process;
4411         ccb->ccb_h.flags |= CAM_UNLOCKED;
4412         ccb->casync.async_code = async_code;
4413         ccb->casync.async_arg_size = 0;
4414         size = xpt_async_size(async_code);
4415         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
4416             ("xpt_async: func %#x %s aync_code %d %s\n",
4417                 ccb->ccb_h.func_code,
4418                 xpt_action_name(ccb->ccb_h.func_code),
4419                 async_code,
4420                 xpt_async_string(async_code)));
4421         if (size > 0 && async_arg != NULL) {
4422                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4423                 if (ccb->casync.async_arg_ptr == NULL) {
4424                         xpt_print(path, "Can't allocate argument to send %s\n",
4425                             xpt_async_string(async_code));
4426                         xpt_free_path(ccb->ccb_h.path);
4427                         xpt_free_ccb(ccb);
4428                         return;
4429                 }
4430                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4431                 ccb->casync.async_arg_size = size;
4432         } else if (size < 0) {
4433                 ccb->casync.async_arg_ptr = async_arg;
4434                 ccb->casync.async_arg_size = size;
4435         }
4436         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4437                 xpt_freeze_devq(path, 1);
4438         else
4439                 xpt_freeze_simq(path->bus->sim, 1);
4440         xpt_done(ccb);
4441 }
4442
4443 static void
4444 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4445                       struct cam_et *target, struct cam_ed *device,
4446                       void *async_arg)
4447 {
4448
4449         /*
4450          * We only need to handle events for real devices.
4451          */
4452         if (target->target_id == CAM_TARGET_WILDCARD
4453          || device->lun_id == CAM_LUN_WILDCARD)
4454                 return;
4455
4456         printf("%s called\n", __func__);
4457 }
4458
4459 static uint32_t
4460 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4461 {
4462         struct cam_devq *devq;
4463         uint32_t freeze;
4464
4465         devq = dev->sim->devq;
4466         mtx_assert(&devq->send_mtx, MA_OWNED);
4467         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4468             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4469             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4470         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4471         /* Remove frozen device from sendq. */
4472         if (device_is_queued(dev))
4473                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4474         return (freeze);
4475 }
4476
4477 u_int32_t
4478 xpt_freeze_devq(struct cam_path *path, u_int count)
4479 {
4480         struct cam_ed   *dev = path->device;
4481         struct cam_devq *devq;
4482         uint32_t         freeze;
4483
4484         devq = dev->sim->devq;
4485         mtx_lock(&devq->send_mtx);
4486         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4487         freeze = xpt_freeze_devq_device(dev, count);
4488         mtx_unlock(&devq->send_mtx);
4489         return (freeze);
4490 }
4491
4492 u_int32_t
4493 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4494 {
4495         struct cam_devq *devq;
4496         uint32_t         freeze;
4497
4498         devq = sim->devq;
4499         mtx_lock(&devq->send_mtx);
4500         freeze = (devq->send_queue.qfrozen_cnt += count);
4501         mtx_unlock(&devq->send_mtx);
4502         return (freeze);
4503 }
4504
4505 static void
4506 xpt_release_devq_timeout(void *arg)
4507 {
4508         struct cam_ed *dev;
4509         struct cam_devq *devq;
4510
4511         dev = (struct cam_ed *)arg;
4512         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4513         devq = dev->sim->devq;
4514         mtx_assert(&devq->send_mtx, MA_OWNED);
4515         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4516                 xpt_run_devq(devq);
4517 }
4518
4519 void
4520 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4521 {
4522         struct cam_ed *dev;
4523         struct cam_devq *devq;
4524
4525         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4526             count, run_queue));
4527         dev = path->device;
4528         devq = dev->sim->devq;
4529         mtx_lock(&devq->send_mtx);
4530         if (xpt_release_devq_device(dev, count, run_queue))
4531                 xpt_run_devq(dev->sim->devq);
4532         mtx_unlock(&devq->send_mtx);
4533 }
4534
4535 static int
4536 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4537 {
4538
4539         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4540         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4541             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4542             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4543         if (count > dev->ccbq.queue.qfrozen_cnt) {
4544 #ifdef INVARIANTS
4545                 printf("xpt_release_devq(): requested %u > present %u\n",
4546                     count, dev->ccbq.queue.qfrozen_cnt);
4547 #endif
4548                 count = dev->ccbq.queue.qfrozen_cnt;
4549         }
4550         dev->ccbq.queue.qfrozen_cnt -= count;
4551         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4552                 /*
4553                  * No longer need to wait for a successful
4554                  * command completion.
4555                  */
4556                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4557                 /*
4558                  * Remove any timeouts that might be scheduled
4559                  * to release this queue.
4560                  */
4561                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4562                         callout_stop(&dev->callout);
4563                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4564                 }
4565                 /*
4566                  * Now that we are unfrozen schedule the
4567                  * device so any pending transactions are
4568                  * run.
4569                  */
4570                 xpt_schedule_devq(dev->sim->devq, dev);
4571         } else
4572                 run_queue = 0;
4573         return (run_queue);
4574 }
4575
4576 void
4577 xpt_release_simq(struct cam_sim *sim, int run_queue)
4578 {
4579         struct cam_devq *devq;
4580
4581         devq = sim->devq;
4582         mtx_lock(&devq->send_mtx);
4583         if (devq->send_queue.qfrozen_cnt <= 0) {
4584 #ifdef INVARIANTS
4585                 printf("xpt_release_simq: requested 1 > present %u\n",
4586                     devq->send_queue.qfrozen_cnt);
4587 #endif
4588         } else
4589                 devq->send_queue.qfrozen_cnt--;
4590         if (devq->send_queue.qfrozen_cnt == 0) {
4591                 /*
4592                  * If there is a timeout scheduled to release this
4593                  * sim queue, remove it.  The queue frozen count is
4594                  * already at 0.
4595                  */
4596                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4597                         callout_stop(&sim->callout);
4598                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4599                 }
4600                 if (run_queue) {
4601                         /*
4602                          * Now that we are unfrozen run the send queue.
4603                          */
4604                         xpt_run_devq(sim->devq);
4605                 }
4606         }
4607         mtx_unlock(&devq->send_mtx);
4608 }
4609
4610 /*
4611  * XXX Appears to be unused.
4612  */
4613 static void
4614 xpt_release_simq_timeout(void *arg)
4615 {
4616         struct cam_sim *sim;
4617
4618         sim = (struct cam_sim *)arg;
4619         xpt_release_simq(sim, /* run_queue */ TRUE);
4620 }
4621
4622 void
4623 xpt_done(union ccb *done_ccb)
4624 {
4625         struct cam_doneq *queue;
4626         int     run, hash;
4627
4628 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4629         if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4630             done_ccb->csio.bio != NULL)
4631                 biotrack(done_ccb->csio.bio, __func__);
4632 #endif
4633
4634         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4635             ("xpt_done: func= %#x %s status %#x\n",
4636                 done_ccb->ccb_h.func_code,
4637                 xpt_action_name(done_ccb->ccb_h.func_code),
4638                 done_ccb->ccb_h.status));
4639         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4640                 return;
4641
4642         /* Store the time the ccb was in the sim */
4643         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4644         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4645             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4646         queue = &cam_doneqs[hash];
4647         mtx_lock(&queue->cam_doneq_mtx);
4648         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4649         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4650         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4651         mtx_unlock(&queue->cam_doneq_mtx);
4652         if (run)
4653                 wakeup(&queue->cam_doneq);
4654 }
4655
4656 void
4657 xpt_done_direct(union ccb *done_ccb)
4658 {
4659
4660         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4661             ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4662         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4663                 return;
4664
4665         /* Store the time the ccb was in the sim */
4666         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4667         xpt_done_process(&done_ccb->ccb_h);
4668 }
4669
4670 union ccb *
4671 xpt_alloc_ccb()
4672 {
4673         union ccb *new_ccb;
4674
4675         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4676         return (new_ccb);
4677 }
4678
4679 union ccb *
4680 xpt_alloc_ccb_nowait()
4681 {
4682         union ccb *new_ccb;
4683
4684         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4685         return (new_ccb);
4686 }
4687
4688 void
4689 xpt_free_ccb(union ccb *free_ccb)
4690 {
4691         free(free_ccb, M_CAMCCB);
4692 }
4693
4694
4695
4696 /* Private XPT functions */
4697
4698 /*
4699  * Get a CAM control block for the caller. Charge the structure to the device
4700  * referenced by the path.  If we don't have sufficient resources to allocate
4701  * more ccbs, we return NULL.
4702  */
4703 static union ccb *
4704 xpt_get_ccb_nowait(struct cam_periph *periph)
4705 {
4706         union ccb *new_ccb;
4707
4708         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4709         if (new_ccb == NULL)
4710                 return (NULL);
4711         periph->periph_allocated++;
4712         cam_ccbq_take_opening(&periph->path->device->ccbq);
4713         return (new_ccb);
4714 }
4715
4716 static union ccb *
4717 xpt_get_ccb(struct cam_periph *periph)
4718 {
4719         union ccb *new_ccb;
4720
4721         cam_periph_unlock(periph);
4722         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4723         cam_periph_lock(periph);
4724         periph->periph_allocated++;
4725         cam_ccbq_take_opening(&periph->path->device->ccbq);
4726         return (new_ccb);
4727 }
4728
4729 union ccb *
4730 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4731 {
4732         struct ccb_hdr *ccb_h;
4733
4734         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4735         cam_periph_assert(periph, MA_OWNED);
4736         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4737             ccb_h->pinfo.priority != priority) {
4738                 if (priority < periph->immediate_priority) {
4739                         periph->immediate_priority = priority;
4740                         xpt_run_allocq(periph, 0);
4741                 } else
4742                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4743                             "cgticb", 0);
4744         }
4745         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4746         return ((union ccb *)ccb_h);
4747 }
4748
4749 static void
4750 xpt_acquire_bus(struct cam_eb *bus)
4751 {
4752
4753         xpt_lock_buses();
4754         bus->refcount++;
4755         xpt_unlock_buses();
4756 }
4757
4758 static void
4759 xpt_release_bus(struct cam_eb *bus)
4760 {
4761
4762         xpt_lock_buses();
4763         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4764         if (--bus->refcount > 0) {
4765                 xpt_unlock_buses();
4766                 return;
4767         }
4768         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4769         xsoftc.bus_generation++;
4770         xpt_unlock_buses();
4771         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4772             ("destroying bus, but target list is not empty"));
4773         cam_sim_release(bus->sim);
4774         mtx_destroy(&bus->eb_mtx);
4775         free(bus, M_CAMXPT);
4776 }
4777
4778 static struct cam_et *
4779 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4780 {
4781         struct cam_et *cur_target, *target;
4782
4783         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4784         mtx_assert(&bus->eb_mtx, MA_OWNED);
4785         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4786                                          M_NOWAIT|M_ZERO);
4787         if (target == NULL)
4788                 return (NULL);
4789
4790         TAILQ_INIT(&target->ed_entries);
4791         target->bus = bus;
4792         target->target_id = target_id;
4793         target->refcount = 1;
4794         target->generation = 0;
4795         target->luns = NULL;
4796         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4797         timevalclear(&target->last_reset);
4798         /*
4799          * Hold a reference to our parent bus so it
4800          * will not go away before we do.
4801          */
4802         bus->refcount++;
4803
4804         /* Insertion sort into our bus's target list */
4805         cur_target = TAILQ_FIRST(&bus->et_entries);
4806         while (cur_target != NULL && cur_target->target_id < target_id)
4807                 cur_target = TAILQ_NEXT(cur_target, links);
4808         if (cur_target != NULL) {
4809                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4810         } else {
4811                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4812         }
4813         bus->generation++;
4814         return (target);
4815 }
4816
4817 static void
4818 xpt_acquire_target(struct cam_et *target)
4819 {
4820         struct cam_eb *bus = target->bus;
4821
4822         mtx_lock(&bus->eb_mtx);
4823         target->refcount++;
4824         mtx_unlock(&bus->eb_mtx);
4825 }
4826
4827 static void
4828 xpt_release_target(struct cam_et *target)
4829 {
4830         struct cam_eb *bus = target->bus;
4831
4832         mtx_lock(&bus->eb_mtx);
4833         if (--target->refcount > 0) {
4834                 mtx_unlock(&bus->eb_mtx);
4835                 return;
4836         }
4837         TAILQ_REMOVE(&bus->et_entries, target, links);
4838         bus->generation++;
4839         mtx_unlock(&bus->eb_mtx);
4840         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4841             ("destroying target, but device list is not empty"));
4842         xpt_release_bus(bus);
4843         mtx_destroy(&target->luns_mtx);
4844         if (target->luns)
4845                 free(target->luns, M_CAMXPT);
4846         free(target, M_CAMXPT);
4847 }
4848
4849 static struct cam_ed *
4850 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4851                          lun_id_t lun_id)
4852 {
4853         struct cam_ed *device;
4854
4855         device = xpt_alloc_device(bus, target, lun_id);
4856         if (device == NULL)
4857                 return (NULL);
4858
4859         device->mintags = 1;
4860         device->maxtags = 1;
4861         return (device);
4862 }
4863
4864 static void
4865 xpt_destroy_device(void *context, int pending)
4866 {
4867         struct cam_ed   *device = context;
4868
4869         mtx_lock(&device->device_mtx);
4870         mtx_destroy(&device->device_mtx);
4871         free(device, M_CAMDEV);
4872 }
4873
4874 struct cam_ed *
4875 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4876 {
4877         struct cam_ed   *cur_device, *device;
4878         struct cam_devq *devq;
4879         cam_status status;
4880
4881         mtx_assert(&bus->eb_mtx, MA_OWNED);
4882         /* Make space for us in the device queue on our bus */
4883         devq = bus->sim->devq;
4884         mtx_lock(&devq->send_mtx);
4885         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4886         mtx_unlock(&devq->send_mtx);
4887         if (status != CAM_REQ_CMP)
4888                 return (NULL);
4889
4890         device = (struct cam_ed *)malloc(sizeof(*device),
4891                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4892         if (device == NULL)
4893                 return (NULL);
4894
4895         cam_init_pinfo(&device->devq_entry);
4896         device->target = target;
4897         device->lun_id = lun_id;
4898         device->sim = bus->sim;
4899         if (cam_ccbq_init(&device->ccbq,
4900                           bus->sim->max_dev_openings) != 0) {
4901                 free(device, M_CAMDEV);
4902                 return (NULL);
4903         }
4904         SLIST_INIT(&device->asyncs);
4905         SLIST_INIT(&device->periphs);
4906         device->generation = 0;
4907         device->flags = CAM_DEV_UNCONFIGURED;
4908         device->tag_delay_count = 0;
4909         device->tag_saved_openings = 0;
4910         device->refcount = 1;
4911         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4912         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4913         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4914         /*
4915          * Hold a reference to our parent bus so it
4916          * will not go away before we do.
4917          */
4918         target->refcount++;
4919
4920         cur_device = TAILQ_FIRST(&target->ed_entries);
4921         while (cur_device != NULL && cur_device->lun_id < lun_id)
4922                 cur_device = TAILQ_NEXT(cur_device, links);
4923         if (cur_device != NULL)
4924                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4925         else
4926                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4927         target->generation++;
4928         return (device);
4929 }
4930
4931 void
4932 xpt_acquire_device(struct cam_ed *device)
4933 {
4934         struct cam_eb *bus = device->target->bus;
4935
4936         mtx_lock(&bus->eb_mtx);
4937         device->refcount++;
4938         mtx_unlock(&bus->eb_mtx);
4939 }
4940
4941 void
4942 xpt_release_device(struct cam_ed *device)
4943 {
4944         struct cam_eb *bus = device->target->bus;
4945         struct cam_devq *devq;
4946
4947         mtx_lock(&bus->eb_mtx);
4948         if (--device->refcount > 0) {
4949                 mtx_unlock(&bus->eb_mtx);
4950                 return;
4951         }
4952
4953         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4954         device->target->generation++;
4955         mtx_unlock(&bus->eb_mtx);
4956
4957         /* Release our slot in the devq */
4958         devq = bus->sim->devq;
4959         mtx_lock(&devq->send_mtx);
4960         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4961         mtx_unlock(&devq->send_mtx);
4962
4963         KASSERT(SLIST_EMPTY(&device->periphs),
4964             ("destroying device, but periphs list is not empty"));
4965         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4966             ("destroying device while still queued for ccbs"));
4967
4968         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4969                 callout_stop(&device->callout);
4970
4971         xpt_release_target(device->target);
4972
4973         cam_ccbq_fini(&device->ccbq);
4974         /*
4975          * Free allocated memory.  free(9) does nothing if the
4976          * supplied pointer is NULL, so it is safe to call without
4977          * checking.
4978          */
4979         free(device->supported_vpds, M_CAMXPT);
4980         free(device->device_id, M_CAMXPT);
4981         free(device->ext_inq, M_CAMXPT);
4982         free(device->physpath, M_CAMXPT);
4983         free(device->rcap_buf, M_CAMXPT);
4984         free(device->serial_num, M_CAMXPT);
4985         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4986 }
4987
4988 u_int32_t
4989 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4990 {
4991         int     result;
4992         struct  cam_ed *dev;
4993
4994         dev = path->device;
4995         mtx_lock(&dev->sim->devq->send_mtx);
4996         result = cam_ccbq_resize(&dev->ccbq, newopenings);
4997         mtx_unlock(&dev->sim->devq->send_mtx);
4998         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4999          || (dev->inq_flags & SID_CmdQue) != 0)
5000                 dev->tag_saved_openings = newopenings;
5001         return (result);
5002 }
5003
5004 static struct cam_eb *
5005 xpt_find_bus(path_id_t path_id)
5006 {
5007         struct cam_eb *bus;
5008
5009         xpt_lock_buses();
5010         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
5011              bus != NULL;
5012              bus = TAILQ_NEXT(bus, links)) {
5013                 if (bus->path_id == path_id) {
5014                         bus->refcount++;
5015                         break;
5016                 }
5017         }
5018         xpt_unlock_buses();
5019         return (bus);
5020 }
5021
5022 static struct cam_et *
5023 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5024 {
5025         struct cam_et *target;
5026
5027         mtx_assert(&bus->eb_mtx, MA_OWNED);
5028         for (target = TAILQ_FIRST(&bus->et_entries);
5029              target != NULL;
5030              target = TAILQ_NEXT(target, links)) {
5031                 if (target->target_id == target_id) {
5032                         target->refcount++;
5033                         break;
5034                 }
5035         }
5036         return (target);
5037 }
5038
5039 static struct cam_ed *
5040 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5041 {
5042         struct cam_ed *device;
5043
5044         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
5045         for (device = TAILQ_FIRST(&target->ed_entries);
5046              device != NULL;
5047              device = TAILQ_NEXT(device, links)) {
5048                 if (device->lun_id == lun_id) {
5049                         device->refcount++;
5050                         break;
5051                 }
5052         }
5053         return (device);
5054 }
5055
5056 void
5057 xpt_start_tags(struct cam_path *path)
5058 {
5059         struct ccb_relsim crs;
5060         struct cam_ed *device;
5061         struct cam_sim *sim;
5062         int    newopenings;
5063
5064         device = path->device;
5065         sim = path->bus->sim;
5066         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5067         xpt_freeze_devq(path, /*count*/1);
5068         device->inq_flags |= SID_CmdQue;
5069         if (device->tag_saved_openings != 0)
5070                 newopenings = device->tag_saved_openings;
5071         else
5072                 newopenings = min(device->maxtags,
5073                                   sim->max_tagged_dev_openings);
5074         xpt_dev_ccbq_resize(path, newopenings);
5075         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5076         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5077         crs.ccb_h.func_code = XPT_REL_SIMQ;
5078         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5079         crs.openings
5080             = crs.release_timeout
5081             = crs.qfrozen_cnt
5082             = 0;
5083         xpt_action((union ccb *)&crs);
5084 }
5085
5086 void
5087 xpt_stop_tags(struct cam_path *path)
5088 {
5089         struct ccb_relsim crs;
5090         struct cam_ed *device;
5091         struct cam_sim *sim;
5092
5093         device = path->device;
5094         sim = path->bus->sim;
5095         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5096         device->tag_delay_count = 0;
5097         xpt_freeze_devq(path, /*count*/1);
5098         device->inq_flags &= ~SID_CmdQue;
5099         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
5100         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5101         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5102         crs.ccb_h.func_code = XPT_REL_SIMQ;
5103         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5104         crs.openings
5105             = crs.release_timeout
5106             = crs.qfrozen_cnt
5107             = 0;
5108         xpt_action((union ccb *)&crs);
5109 }
5110
5111 static void
5112 xpt_boot_delay(void *arg)
5113 {
5114
5115         xpt_release_boot();
5116 }
5117
5118 static void
5119 xpt_config(void *arg)
5120 {
5121         /*
5122          * Now that interrupts are enabled, go find our devices
5123          */
5124         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
5125                 printf("xpt_config: failed to create taskqueue thread.\n");
5126
5127         /* Setup debugging path */
5128         if (cam_dflags != CAM_DEBUG_NONE) {
5129                 if (xpt_create_path(&cam_dpath, NULL,
5130                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
5131                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
5132                         printf("xpt_config: xpt_create_path() failed for debug"
5133                                " target %d:%d:%d, debugging disabled\n",
5134                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
5135                         cam_dflags = CAM_DEBUG_NONE;
5136                 }
5137         } else
5138                 cam_dpath = NULL;
5139
5140         periphdriver_init(1);
5141         xpt_hold_boot();
5142         callout_init(&xsoftc.boot_callout, 1);
5143         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5144             xpt_boot_delay, NULL, 0);
5145         /* Fire up rescan thread. */
5146         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5147             "cam", "scanner")) {
5148                 printf("xpt_config: failed to create rescan thread.\n");
5149         }
5150 }
5151
5152 void
5153 xpt_hold_boot(void)
5154 {
5155         xpt_lock_buses();
5156         xsoftc.buses_to_config++;
5157         xpt_unlock_buses();
5158 }
5159
5160 void
5161 xpt_release_boot(void)
5162 {
5163         xpt_lock_buses();
5164         xsoftc.buses_to_config--;
5165         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
5166                 struct  xpt_task *task;
5167
5168                 xsoftc.buses_config_done = 1;
5169                 xpt_unlock_buses();
5170                 /* Call manually because we don't have any buses */
5171                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
5172                 if (task != NULL) {
5173                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
5174                         taskqueue_enqueue(taskqueue_thread, &task->task);
5175                 }
5176         } else
5177                 xpt_unlock_buses();
5178 }
5179
5180 /*
5181  * If the given device only has one peripheral attached to it, and if that
5182  * peripheral is the passthrough driver, announce it.  This insures that the
5183  * user sees some sort of announcement for every peripheral in their system.
5184  */
5185 static int
5186 xptpassannouncefunc(struct cam_ed *device, void *arg)
5187 {
5188         struct cam_periph *periph;
5189         int i;
5190
5191         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5192              periph = SLIST_NEXT(periph, periph_links), i++);
5193
5194         periph = SLIST_FIRST(&device->periphs);
5195         if ((i == 1)
5196          && (strncmp(periph->periph_name, "pass", 4) == 0))
5197                 xpt_announce_periph(periph, NULL);
5198
5199         return(1);
5200 }
5201
5202 static void
5203 xpt_finishconfig_task(void *context, int pending)
5204 {
5205
5206         periphdriver_init(2);
5207         /*
5208          * Check for devices with no "standard" peripheral driver
5209          * attached.  For any devices like that, announce the
5210          * passthrough driver so the user will see something.
5211          */
5212         if (!bootverbose)
5213                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5214
5215         /* Release our hook so that the boot can continue. */
5216         config_intrhook_disestablish(xsoftc.xpt_config_hook);
5217         free(xsoftc.xpt_config_hook, M_CAMXPT);
5218         xsoftc.xpt_config_hook = NULL;
5219
5220         free(context, M_CAMXPT);
5221 }
5222
5223 cam_status
5224 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5225                    struct cam_path *path)
5226 {
5227         struct ccb_setasync csa;
5228         cam_status status;
5229         int xptpath = 0;
5230
5231         if (path == NULL) {
5232                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5233                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5234                 if (status != CAM_REQ_CMP)
5235                         return (status);
5236                 xpt_path_lock(path);
5237                 xptpath = 1;
5238         }
5239
5240         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5241         csa.ccb_h.func_code = XPT_SASYNC_CB;
5242         csa.event_enable = event;
5243         csa.callback = cbfunc;
5244         csa.callback_arg = cbarg;
5245         xpt_action((union ccb *)&csa);
5246         status = csa.ccb_h.status;
5247
5248         CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5249             ("xpt_register_async: func %p\n", cbfunc));
5250
5251         if (xptpath) {
5252                 xpt_path_unlock(path);
5253                 xpt_free_path(path);
5254         }
5255
5256         if ((status == CAM_REQ_CMP) &&
5257             (csa.event_enable & AC_FOUND_DEVICE)) {
5258                 /*
5259                  * Get this peripheral up to date with all
5260                  * the currently existing devices.
5261                  */
5262                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5263         }
5264         if ((status == CAM_REQ_CMP) &&
5265             (csa.event_enable & AC_PATH_REGISTERED)) {
5266                 /*
5267                  * Get this peripheral up to date with all
5268                  * the currently existing buses.
5269                  */
5270                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5271         }
5272
5273         return (status);
5274 }
5275
5276 static void
5277 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5278 {
5279         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5280
5281         switch (work_ccb->ccb_h.func_code) {
5282         /* Common cases first */
5283         case XPT_PATH_INQ:              /* Path routing inquiry */
5284         {
5285                 struct ccb_pathinq *cpi;
5286
5287                 cpi = &work_ccb->cpi;
5288                 cpi->version_num = 1; /* XXX??? */
5289                 cpi->hba_inquiry = 0;
5290                 cpi->target_sprt = 0;
5291                 cpi->hba_misc = 0;
5292                 cpi->hba_eng_cnt = 0;
5293                 cpi->max_target = 0;
5294                 cpi->max_lun = 0;
5295                 cpi->initiator_id = 0;
5296                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5297                 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5298                 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5299                 cpi->unit_number = sim->unit_number;
5300                 cpi->bus_id = sim->bus_id;
5301                 cpi->base_transfer_speed = 0;
5302                 cpi->protocol = PROTO_UNSPECIFIED;
5303                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5304                 cpi->transport = XPORT_UNSPECIFIED;
5305                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5306                 cpi->ccb_h.status = CAM_REQ_CMP;
5307                 xpt_done(work_ccb);
5308                 break;
5309         }
5310         default:
5311                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5312                 xpt_done(work_ccb);
5313                 break;
5314         }
5315 }
5316
5317 /*
5318  * The xpt as a "controller" has no interrupt sources, so polling
5319  * is a no-op.
5320  */
5321 static void
5322 xptpoll(struct cam_sim *sim)
5323 {
5324 }
5325
5326 void
5327 xpt_lock_buses(void)
5328 {
5329         mtx_lock(&xsoftc.xpt_topo_lock);
5330 }
5331
5332 void
5333 xpt_unlock_buses(void)
5334 {
5335         mtx_unlock(&xsoftc.xpt_topo_lock);
5336 }
5337
5338 struct mtx *
5339 xpt_path_mtx(struct cam_path *path)
5340 {
5341
5342         return (&path->device->device_mtx);
5343 }
5344
5345 static void
5346 xpt_done_process(struct ccb_hdr *ccb_h)
5347 {
5348         struct cam_sim *sim;
5349         struct cam_devq *devq;
5350         struct mtx *mtx = NULL;
5351
5352 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5353         struct ccb_scsiio *csio;
5354
5355         if (ccb_h->func_code == XPT_SCSI_IO) {
5356                 csio = &((union ccb *)ccb_h)->csio;
5357                 if (csio->bio != NULL)
5358                         biotrack(csio->bio, __func__);
5359         }
5360 #endif
5361
5362         if (ccb_h->flags & CAM_HIGH_POWER) {
5363                 struct highpowerlist    *hphead;
5364                 struct cam_ed           *device;
5365
5366                 mtx_lock(&xsoftc.xpt_highpower_lock);
5367                 hphead = &xsoftc.highpowerq;
5368
5369                 device = STAILQ_FIRST(hphead);
5370
5371                 /*
5372                  * Increment the count since this command is done.
5373                  */
5374                 xsoftc.num_highpower++;
5375
5376                 /*
5377                  * Any high powered commands queued up?
5378                  */
5379                 if (device != NULL) {
5380
5381                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5382                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5383
5384                         mtx_lock(&device->sim->devq->send_mtx);
5385                         xpt_release_devq_device(device,
5386                                          /*count*/1, /*runqueue*/TRUE);
5387                         mtx_unlock(&device->sim->devq->send_mtx);
5388                 } else
5389                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5390         }
5391
5392         sim = ccb_h->path->bus->sim;
5393
5394         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5395                 xpt_release_simq(sim, /*run_queue*/FALSE);
5396                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5397         }
5398
5399         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5400          && (ccb_h->status & CAM_DEV_QFRZN)) {
5401                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5402                 ccb_h->status &= ~CAM_DEV_QFRZN;
5403         }
5404
5405         devq = sim->devq;
5406         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5407                 struct cam_ed *dev = ccb_h->path->device;
5408
5409                 mtx_lock(&devq->send_mtx);
5410                 devq->send_active--;
5411                 devq->send_openings++;
5412                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5413
5414                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5415                   && (dev->ccbq.dev_active == 0))) {
5416                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5417                         xpt_release_devq_device(dev, /*count*/1,
5418                                          /*run_queue*/FALSE);
5419                 }
5420
5421                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5422                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5423                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5424                         xpt_release_devq_device(dev, /*count*/1,
5425                                          /*run_queue*/FALSE);
5426                 }
5427
5428                 if (!device_is_queued(dev))
5429                         (void)xpt_schedule_devq(devq, dev);
5430                 xpt_run_devq(devq);
5431                 mtx_unlock(&devq->send_mtx);
5432
5433                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5434                         mtx = xpt_path_mtx(ccb_h->path);
5435                         mtx_lock(mtx);
5436
5437                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5438                          && (--dev->tag_delay_count == 0))
5439                                 xpt_start_tags(ccb_h->path);
5440                 }
5441         }
5442
5443         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5444                 if (mtx == NULL) {
5445                         mtx = xpt_path_mtx(ccb_h->path);
5446                         mtx_lock(mtx);
5447                 }
5448         } else {
5449                 if (mtx != NULL) {
5450                         mtx_unlock(mtx);
5451                         mtx = NULL;
5452                 }
5453         }
5454
5455         /* Call the peripheral driver's callback */
5456         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5457         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5458         if (mtx != NULL)
5459                 mtx_unlock(mtx);
5460 }
5461
5462 void
5463 xpt_done_td(void *arg)
5464 {
5465         struct cam_doneq *queue = arg;
5466         struct ccb_hdr *ccb_h;
5467         STAILQ_HEAD(, ccb_hdr)  doneq;
5468
5469         STAILQ_INIT(&doneq);
5470         mtx_lock(&queue->cam_doneq_mtx);
5471         while (1) {
5472                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5473                         queue->cam_doneq_sleep = 1;
5474                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5475                             PRIBIO, "-", 0);
5476                         queue->cam_doneq_sleep = 0;
5477                 }
5478                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5479                 mtx_unlock(&queue->cam_doneq_mtx);
5480
5481                 THREAD_NO_SLEEPING();
5482                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5483                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5484                         xpt_done_process(ccb_h);
5485                 }
5486                 THREAD_SLEEPING_OK();
5487
5488                 mtx_lock(&queue->cam_doneq_mtx);
5489         }
5490 }
5491
5492 static void
5493 camisr_runqueue(void)
5494 {
5495         struct  ccb_hdr *ccb_h;
5496         struct cam_doneq *queue;
5497         int i;
5498
5499         /* Process global queues. */
5500         for (i = 0; i < cam_num_doneqs; i++) {
5501                 queue = &cam_doneqs[i];
5502                 mtx_lock(&queue->cam_doneq_mtx);
5503                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5504                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5505                         mtx_unlock(&queue->cam_doneq_mtx);
5506                         xpt_done_process(ccb_h);
5507                         mtx_lock(&queue->cam_doneq_mtx);
5508                 }
5509                 mtx_unlock(&queue->cam_doneq_mtx);
5510         }
5511 }
5512
5513 struct kv
5514 {
5515         uint32_t v;
5516         const char *name;
5517 };
5518
5519 static struct kv map[] = {
5520         { XPT_NOOP, "XPT_NOOP" },
5521         { XPT_SCSI_IO, "XPT_SCSI_IO" },
5522         { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5523         { XPT_GDEVLIST, "XPT_GDEVLIST" },
5524         { XPT_PATH_INQ, "XPT_PATH_INQ" },
5525         { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5526         { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5527         { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5528         { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5529         { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5530         { XPT_DEBUG, "XPT_DEBUG" },
5531         { XPT_PATH_STATS, "XPT_PATH_STATS" },
5532         { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5533         { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5534         { XPT_ASYNC, "XPT_ASYNC" },
5535         { XPT_ABORT, "XPT_ABORT" },
5536         { XPT_RESET_BUS, "XPT_RESET_BUS" },
5537         { XPT_RESET_DEV, "XPT_RESET_DEV" },
5538         { XPT_TERM_IO, "XPT_TERM_IO" },
5539         { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5540         { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5541         { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5542         { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5543         { XPT_ATA_IO, "XPT_ATA_IO" },
5544         { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5545         { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5546         { XPT_NVME_IO, "XPT_NVME_IO" },
5547         { XPT_MMC_IO, "XPT_MMC_IO" },
5548         { XPT_SMP_IO, "XPT_SMP_IO" },
5549         { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5550         { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" },
5551         { XPT_ENG_INQ, "XPT_ENG_INQ" },
5552         { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5553         { XPT_EN_LUN, "XPT_EN_LUN" },
5554         { XPT_TARGET_IO, "XPT_TARGET_IO" },
5555         { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5556         { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5557         { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5558         { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5559         { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5560         { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5561         { 0, 0 }
5562 };
5563
5564 const char *
5565 xpt_action_name(uint32_t action)
5566 {
5567         static char buffer[32]; /* Only for unknown messages -- racy */
5568         struct kv *walker = map;
5569
5570         while (walker->name != NULL) {
5571                 if (walker->v == action)
5572                         return (walker->name);
5573                 walker++;
5574         }
5575
5576         snprintf(buffer, sizeof(buffer), "%#x", action);
5577         return (buffer);
5578 }