sys/cam/cam_xpt.c

   1 /*-
   2  * Implementation of the Common Access Method Transport (XPT) layer.
   3  *
   4  * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
   5  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions, and the following disclaimer,
  13  *    without modification, immediately at the beginning of the file.
  14  * 2. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  21  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/param.h>
  34 #include <sys/bus.h>
  35 #include <sys/systm.h>
  36 #include <sys/types.h>
  37 #include <sys/malloc.h>
  38 #include <sys/kernel.h>
  39 #include <sys/time.h>
  40 #include <sys/conf.h>
  41 #include <sys/fcntl.h>
  42 #include <sys/interrupt.h>
  43 #include <sys/proc.h>
  44 #include <sys/sbuf.h>
  45 #include <sys/smp.h>
  46 #include <sys/taskqueue.h>
  47
  48 #include <sys/lock.h>
  49 #include <sys/mutex.h>
  50 #include <sys/sysctl.h>
  51 #include <sys/kthread.h>
  52
  53 #include <cam/cam.h>
  54 #include <cam/cam_ccb.h>
  55 #include <cam/cam_periph.h>
  56 #include <cam/cam_queue.h>
  57 #include <cam/cam_sim.h>
  58 #include <cam/cam_xpt.h>
  59 #include <cam/cam_xpt_sim.h>
  60 #include <cam/cam_xpt_periph.h>
  61 #include <cam/cam_xpt_internal.h>
  62 #include <cam/cam_debug.h>
  63 #include <cam/cam_compat.h>
  64
  65 #include <cam/scsi/scsi_all.h>
  66 #include <cam/scsi/scsi_message.h>
  67 #include <cam/scsi/scsi_pass.h>
  68
  69 #include <machine/md_var.h>     /* geometry translation */
  70 #include <machine/stdarg.h>     /* for xpt_print below */
  71
  72 #include "opt_cam.h"
  73
  74 /*
  75  * This is the maximum number of high powered commands (e.g. start unit)
  76  * that can be outstanding at a particular time.
  77  */
  78 #ifndef CAM_MAX_HIGHPOWER
  79 #define CAM_MAX_HIGHPOWER  4
  80 #endif
  81
  82 /* Datastructures internal to the xpt layer */
  83 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
  84 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
  85 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
  86 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
  87
  88 /* Object for defering XPT actions to a taskqueue */
  89 struct xpt_task {
  90         struct task     task;
  91         void            *data1;
  92         uintptr_t       data2;
  93 };
  94
  95 struct xpt_softc {
  96         uint32_t                xpt_generation;
  97
  98         /* number of high powered commands that can go through right now */
  99         struct mtx              xpt_highpower_lock;
 100         STAILQ_HEAD(highpowerlist, cam_ed)      highpowerq;
 101         int                     num_highpower;
 102
 103         /* queue for handling async rescan requests. */
 104         TAILQ_HEAD(, ccb_hdr) ccb_scanq;
 105         int buses_to_config;
 106         int buses_config_done;
 107
 108         /* Registered busses */
 109         TAILQ_HEAD(,cam_eb)     xpt_busses;
 110         u_int                   bus_generation;
 111
 112         struct intr_config_hook *xpt_config_hook;
 113
 114         int                     boot_delay;
 115         struct callout          boot_callout;
 116
 117         struct mtx              xpt_topo_lock;
 118         struct mtx              xpt_lock;
 119         struct taskqueue        *xpt_taskq;
 120 };
 121
 122 typedef enum {
 123         DM_RET_COPY             = 0x01,
 124         DM_RET_FLAG_MASK        = 0x0f,
 125         DM_RET_NONE             = 0x00,
 126         DM_RET_STOP             = 0x10,
 127         DM_RET_DESCEND          = 0x20,
 128         DM_RET_ERROR            = 0x30,
 129         DM_RET_ACTION_MASK      = 0xf0
 130 } dev_match_ret;
 131
 132 typedef enum {
 133         XPT_DEPTH_BUS,
 134         XPT_DEPTH_TARGET,
 135         XPT_DEPTH_DEVICE,
 136         XPT_DEPTH_PERIPH
 137 } xpt_traverse_depth;
 138
 139 struct xpt_traverse_config {
 140         xpt_traverse_depth      depth;
 141         void                    *tr_func;
 142         void                    *tr_arg;
 143 };
 144
 145 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 146 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 147 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 148 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 149 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 150
 151 /* Transport layer configuration information */
 152 static struct xpt_softc xsoftc;
 153
 154 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
 155
 156 TUNABLE_INT("kern.cam.boot_delay", &xsoftc.boot_delay);
 157 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
 158            &xsoftc.boot_delay, 0, "Bus registration wait time");
 159 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
 160             &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
 161
 162 struct cam_doneq {
 163         struct mtx_padalign     cam_doneq_mtx;
 164         STAILQ_HEAD(, ccb_hdr)  cam_doneq;
 165         int                     cam_doneq_sleep;
 166 };
 167
 168 static struct cam_doneq cam_doneqs[MAXCPU];
 169 static int cam_num_doneqs;
 170 static struct proc *cam_proc;
 171
 172 TUNABLE_INT("kern.cam.num_doneqs", &cam_num_doneqs);
 173 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
 174            &cam_num_doneqs, 0, "Number of completion queues/threads");
 175
 176 struct cam_periph *xpt_periph;
 177
 178 static periph_init_t xpt_periph_init;
 179
 180 static struct periph_driver xpt_driver =
 181 {
 182         xpt_periph_init, "xpt",
 183         TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
 184         CAM_PERIPH_DRV_EARLY
 185 };
 186
 187 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 188
 189 static d_open_t xptopen;
 190 static d_close_t xptclose;
 191 static d_ioctl_t xptioctl;
 192 static d_ioctl_t xptdoioctl;
 193
 194 static struct cdevsw xpt_cdevsw = {
 195         .d_version =    D_VERSION,
 196         .d_flags =      0,
 197         .d_open =       xptopen,
 198         .d_close =      xptclose,
 199         .d_ioctl =      xptioctl,
 200         .d_name =       "xpt",
 201 };
 202
 203 /* Storage for debugging datastructures */
 204 struct cam_path *cam_dpath;
 205 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
 206 TUNABLE_INT("kern.cam.dflags", &cam_dflags);
 207 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RW,
 208         &cam_dflags, 0, "Enabled debug flags");
 209 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
 210 TUNABLE_INT("kern.cam.debug_delay", &cam_debug_delay);
 211 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RW,
 212         &cam_debug_delay, 0, "Delay in us after each debug message");
 213
 214 /* Our boot-time initialization hook */
 215 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 216
 217 static moduledata_t cam_moduledata = {
 218         "cam",
 219         cam_module_event_handler,
 220         NULL
 221 };
 222
 223 static int      xpt_init(void *);
 224
 225 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 226 MODULE_VERSION(cam, 1);
 227
 228
 229 static void             xpt_async_bcast(struct async_list *async_head,
 230                                         u_int32_t async_code,
 231                                         struct cam_path *path,
 232                                         void *async_arg);
 233 static path_id_t xptnextfreepathid(void);
 234 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 235 static union ccb *xpt_get_ccb(struct cam_periph *periph);
 236 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
 237 static void      xpt_run_allocq(struct cam_periph *periph, int sleep);
 238 static void      xpt_run_allocq_task(void *context, int pending);
 239 static void      xpt_run_devq(struct cam_devq *devq);
 240 static timeout_t xpt_release_devq_timeout;
 241 static void      xpt_release_simq_timeout(void *arg) __unused;
 242 static void      xpt_acquire_bus(struct cam_eb *bus);
 243 static void      xpt_release_bus(struct cam_eb *bus);
 244 static uint32_t  xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
 245 static int       xpt_release_devq_device(struct cam_ed *dev, u_int count,
 246                     int run_queue);
 247 static struct cam_et*
 248                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 249 static void      xpt_acquire_target(struct cam_et *target);
 250 static void      xpt_release_target(struct cam_et *target);
 251 static struct cam_eb*
 252                  xpt_find_bus(path_id_t path_id);
 253 static struct cam_et*
 254                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 255 static struct cam_ed*
 256                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 257 static void      xpt_config(void *arg);
 258 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 259                                  u_int32_t new_priority);
 260 static xpt_devicefunc_t xptpassannouncefunc;
 261 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 262 static void      xptpoll(struct cam_sim *sim);
 263 static void      camisr_runqueue(void);
 264 static void      xpt_done_process(struct ccb_hdr *ccb_h);
 265 static void      xpt_done_td(void *);
 266 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 267                                     u_int num_patterns, struct cam_eb *bus);
 268 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 269                                        u_int num_patterns,
 270                                        struct cam_ed *device);
 271 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 272                                        u_int num_patterns,
 273                                        struct cam_periph *periph);
 274 static xpt_busfunc_t    xptedtbusfunc;
 275 static xpt_targetfunc_t xptedttargetfunc;
 276 static xpt_devicefunc_t xptedtdevicefunc;
 277 static xpt_periphfunc_t xptedtperiphfunc;
 278 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 279 static xpt_periphfunc_t xptplistperiphfunc;
 280 static int              xptedtmatch(struct ccb_dev_match *cdm);
 281 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 282 static int              xptbustraverse(struct cam_eb *start_bus,
 283                                        xpt_busfunc_t *tr_func, void *arg);
 284 static int              xpttargettraverse(struct cam_eb *bus,
 285                                           struct cam_et *start_target,
 286                                           xpt_targetfunc_t *tr_func, void *arg);
 287 static int              xptdevicetraverse(struct cam_et *target,
 288                                           struct cam_ed *start_device,
 289                                           xpt_devicefunc_t *tr_func, void *arg);
 290 static int              xptperiphtraverse(struct cam_ed *device,
 291                                           struct cam_periph *start_periph,
 292                                           xpt_periphfunc_t *tr_func, void *arg);
 293 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 294                                         xpt_pdrvfunc_t *tr_func, void *arg);
 295 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 296                                             struct cam_periph *start_periph,
 297                                             xpt_periphfunc_t *tr_func,
 298                                             void *arg);
 299 static xpt_busfunc_t    xptdefbusfunc;
 300 static xpt_targetfunc_t xptdeftargetfunc;
 301 static xpt_devicefunc_t xptdefdevicefunc;
 302 static xpt_periphfunc_t xptdefperiphfunc;
 303 static void             xpt_finishconfig_task(void *context, int pending);
 304 static void             xpt_dev_async_default(u_int32_t async_code,
 305                                               struct cam_eb *bus,
 306                                               struct cam_et *target,
 307                                               struct cam_ed *device,
 308                                               void *async_arg);
 309 static struct cam_ed *  xpt_alloc_device_default(struct cam_eb *bus,
 310                                                  struct cam_et *target,
 311                                                  lun_id_t lun_id);
 312 static xpt_devicefunc_t xptsetasyncfunc;
 313 static xpt_busfunc_t    xptsetasyncbusfunc;
 314 static cam_status       xptregister(struct cam_periph *periph,
 315                                     void *arg);
 316 static __inline int device_is_queued(struct cam_ed *device);
 317
 318 static __inline int
 319 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 320 {
 321         int     retval;
 322
 323         mtx_assert(&devq->send_mtx, MA_OWNED);
 324         if ((dev->ccbq.queue.entries > 0) &&
 325             (dev->ccbq.dev_openings > 0) &&
 326             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 327                 /*
 328                  * The priority of a device waiting for controller
 329                  * resources is that of the highest priority CCB
 330                  * enqueued.
 331                  */
 332                 retval =
 333                     xpt_schedule_dev(&devq->send_queue,
 334                                      &dev->devq_entry,
 335                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 336         } else {
 337                 retval = 0;
 338         }
 339         return (retval);
 340 }
 341
 342 static __inline int
 343 device_is_queued(struct cam_ed *device)
 344 {
 345         return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
 346 }
 347
 348 static void
 349 xpt_periph_init()
 350 {
 351         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 352 }
 353
 354 static int
 355 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 356 {
 357
 358         /*
 359          * Only allow read-write access.
 360          */
 361         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 362                 return(EPERM);
 363
 364         /*
 365          * We don't allow nonblocking access.
 366          */
 367         if ((flags & O_NONBLOCK) != 0) {
 368                 printf("%s: can't do nonblocking access\n", devtoname(dev));
 369                 return(ENODEV);
 370         }
 371
 372         return(0);
 373 }
 374
 375 static int
 376 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 377 {
 378
 379         return(0);
 380 }
 381
 382 /*
 383  * Don't automatically grab the xpt softc lock here even though this is going
 384  * through the xpt device.  The xpt device is really just a back door for
 385  * accessing other devices and SIMs, so the right thing to do is to grab
 386  * the appropriate SIM lock once the bus/SIM is located.
 387  */
 388 static int
 389 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 390 {
 391         int error;
 392
 393         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 394                 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
 395         }
 396         return (error);
 397 }
 398
 399 static int
 400 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 401 {
 402         int error;
 403
 404         error = 0;
 405
 406         switch(cmd) {
 407         /*
 408          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 409          * to accept CCB types that don't quite make sense to send through a
 410          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 411          * in the CAM spec.
 412          */
 413         case CAMIOCOMMAND: {
 414                 union ccb *ccb;
 415                 union ccb *inccb;
 416                 struct cam_eb *bus;
 417
 418                 inccb = (union ccb *)addr;
 419
 420                 bus = xpt_find_bus(inccb->ccb_h.path_id);
 421                 if (bus == NULL)
 422                         return (EINVAL);
 423
 424                 switch (inccb->ccb_h.func_code) {
 425                 case XPT_SCAN_BUS:
 426                 case XPT_RESET_BUS:
 427                         if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
 428                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 429                                 xpt_release_bus(bus);
 430                                 return (EINVAL);
 431                         }
 432                         break;
 433                 case XPT_SCAN_TGT:
 434                         if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
 435                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 436                                 xpt_release_bus(bus);
 437                                 return (EINVAL);
 438                         }
 439                         break;
 440                 default:
 441                         break;
 442                 }
 443
 444                 switch(inccb->ccb_h.func_code) {
 445                 case XPT_SCAN_BUS:
 446                 case XPT_RESET_BUS:
 447                 case XPT_PATH_INQ:
 448                 case XPT_ENG_INQ:
 449                 case XPT_SCAN_LUN:
 450                 case XPT_SCAN_TGT:
 451
 452                         ccb = xpt_alloc_ccb();
 453
 454                         /*
 455                          * Create a path using the bus, target, and lun the
 456                          * user passed in.
 457                          */
 458                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 459                                             inccb->ccb_h.path_id,
 460                                             inccb->ccb_h.target_id,
 461                                             inccb->ccb_h.target_lun) !=
 462                                             CAM_REQ_CMP){
 463                                 error = EINVAL;
 464                                 xpt_free_ccb(ccb);
 465                                 break;
 466                         }
 467                         /* Ensure all of our fields are correct */
 468                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 469                                       inccb->ccb_h.pinfo.priority);
 470                         xpt_merge_ccb(ccb, inccb);
 471                         xpt_path_lock(ccb->ccb_h.path);
 472                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 473                         xpt_path_unlock(ccb->ccb_h.path);
 474                         bcopy(ccb, inccb, sizeof(union ccb));
 475                         xpt_free_path(ccb->ccb_h.path);
 476                         xpt_free_ccb(ccb);
 477                         break;
 478
 479                 case XPT_DEBUG: {
 480                         union ccb ccb;
 481
 482                         /*
 483                          * This is an immediate CCB, so it's okay to
 484                          * allocate it on the stack.
 485                          */
 486
 487                         /*
 488                          * Create a path using the bus, target, and lun the
 489                          * user passed in.
 490                          */
 491                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 492                                             inccb->ccb_h.path_id,
 493                                             inccb->ccb_h.target_id,
 494                                             inccb->ccb_h.target_lun) !=
 495                                             CAM_REQ_CMP){
 496                                 error = EINVAL;
 497                                 break;
 498                         }
 499                         /* Ensure all of our fields are correct */
 500                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 501                                       inccb->ccb_h.pinfo.priority);
 502                         xpt_merge_ccb(&ccb, inccb);
 503                         xpt_action(&ccb);
 504                         bcopy(&ccb, inccb, sizeof(union ccb));
 505                         xpt_free_path(ccb.ccb_h.path);
 506                         break;
 507
 508                 }
 509                 case XPT_DEV_MATCH: {
 510                         struct cam_periph_map_info mapinfo;
 511                         struct cam_path *old_path;
 512
 513                         /*
 514                          * We can't deal with physical addresses for this
 515                          * type of transaction.
 516                          */
 517                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 518                             CAM_DATA_VADDR) {
 519                                 error = EINVAL;
 520                                 break;
 521                         }
 522
 523                         /*
 524                          * Save this in case the caller had it set to
 525                          * something in particular.
 526                          */
 527                         old_path = inccb->ccb_h.path;
 528
 529                         /*
 530                          * We really don't need a path for the matching
 531                          * code.  The path is needed because of the
 532                          * debugging statements in xpt_action().  They
 533                          * assume that the CCB has a valid path.
 534                          */
 535                         inccb->ccb_h.path = xpt_periph->path;
 536
 537                         bzero(&mapinfo, sizeof(mapinfo));
 538
 539                         /*
 540                          * Map the pattern and match buffers into kernel
 541                          * virtual address space.
 542                          */
 543                         error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS);
 544
 545                         if (error) {
 546                                 inccb->ccb_h.path = old_path;
 547                                 break;
 548                         }
 549
 550                         /*
 551                          * This is an immediate CCB, we can send it on directly.
 552                          */
 553                         xpt_action(inccb);
 554
 555                         /*
 556                          * Map the buffers back into user space.
 557                          */
 558                         cam_periph_unmapmem(inccb, &mapinfo);
 559
 560                         inccb->ccb_h.path = old_path;
 561
 562                         error = 0;
 563                         break;
 564                 }
 565                 default:
 566                         error = ENOTSUP;
 567                         break;
 568                 }
 569                 xpt_release_bus(bus);
 570                 break;
 571         }
 572         /*
 573          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 574          * with the periphal driver name and unit name filled in.  The other
 575          * fields don't really matter as input.  The passthrough driver name
 576          * ("pass"), and unit number are passed back in the ccb.  The current
 577          * device generation number, and the index into the device peripheral
 578          * driver list, and the status are also passed back.  Note that
 579          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 580          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 581          * (or rather should be) impossible for the device peripheral driver
 582          * list to change since we look at the whole thing in one pass, and
 583          * we do it with lock protection.
 584          *
 585          */
 586         case CAMGETPASSTHRU: {
 587                 union ccb *ccb;
 588                 struct cam_periph *periph;
 589                 struct periph_driver **p_drv;
 590                 char   *name;
 591                 u_int unit;
 592                 int base_periph_found;
 593
 594                 ccb = (union ccb *)addr;
 595                 unit = ccb->cgdl.unit_number;
 596                 name = ccb->cgdl.periph_name;
 597                 base_periph_found = 0;
 598
 599                 /*
 600                  * Sanity check -- make sure we don't get a null peripheral
 601                  * driver name.
 602                  */
 603                 if (*ccb->cgdl.periph_name == '\0') {
 604                         error = EINVAL;
 605                         break;
 606                 }
 607
 608                 /* Keep the list from changing while we traverse it */
 609                 xpt_lock_buses();
 610
 611                 /* first find our driver in the list of drivers */
 612                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 613                         if (strcmp((*p_drv)->driver_name, name) == 0)
 614                                 break;
 615
 616                 if (*p_drv == NULL) {
 617                         xpt_unlock_buses();
 618                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 619                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 620                         *ccb->cgdl.periph_name = '\0';
 621                         ccb->cgdl.unit_number = 0;
 622                         error = ENOENT;
 623                         break;
 624                 }
 625
 626                 /*
 627                  * Run through every peripheral instance of this driver
 628                  * and check to see whether it matches the unit passed
 629                  * in by the user.  If it does, get out of the loops and
 630                  * find the passthrough driver associated with that
 631                  * peripheral driver.
 632                  */
 633                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 634                      periph = TAILQ_NEXT(periph, unit_links)) {
 635
 636                         if (periph->unit_number == unit)
 637                                 break;
 638                 }
 639                 /*
 640                  * If we found the peripheral driver that the user passed
 641                  * in, go through all of the peripheral drivers for that
 642                  * particular device and look for a passthrough driver.
 643                  */
 644                 if (periph != NULL) {
 645                         struct cam_ed *device;
 646                         int i;
 647
 648                         base_periph_found = 1;
 649                         device = periph->path->device;
 650                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 651                              periph != NULL;
 652                              periph = SLIST_NEXT(periph, periph_links), i++) {
 653                                 /*
 654                                  * Check to see whether we have a
 655                                  * passthrough device or not.
 656                                  */
 657                                 if (strcmp(periph->periph_name, "pass") == 0) {
 658                                         /*
 659                                          * Fill in the getdevlist fields.
 660                                          */
 661                                         strcpy(ccb->cgdl.periph_name,
 662                                                periph->periph_name);
 663                                         ccb->cgdl.unit_number =
 664                                                 periph->unit_number;
 665                                         if (SLIST_NEXT(periph, periph_links))
 666                                                 ccb->cgdl.status =
 667                                                         CAM_GDEVLIST_MORE_DEVS;
 668                                         else
 669                                                 ccb->cgdl.status =
 670                                                        CAM_GDEVLIST_LAST_DEVICE;
 671                                         ccb->cgdl.generation =
 672                                                 device->generation;
 673                                         ccb->cgdl.index = i;
 674                                         /*
 675                                          * Fill in some CCB header fields
 676                                          * that the user may want.
 677                                          */
 678                                         ccb->ccb_h.path_id =
 679                                                 periph->path->bus->path_id;
 680                                         ccb->ccb_h.target_id =
 681                                                 periph->path->target->target_id;
 682                                         ccb->ccb_h.target_lun =
 683                                                 periph->path->device->lun_id;
 684                                         ccb->ccb_h.status = CAM_REQ_CMP;
 685                                         break;
 686                                 }
 687                         }
 688                 }
 689
 690                 /*
 691                  * If the periph is null here, one of two things has
 692                  * happened.  The first possibility is that we couldn't
 693                  * find the unit number of the particular peripheral driver
 694                  * that the user is asking about.  e.g. the user asks for
 695                  * the passthrough driver for "da11".  We find the list of
 696                  * "da" peripherals all right, but there is no unit 11.
 697                  * The other possibility is that we went through the list
 698                  * of peripheral drivers attached to the device structure,
 699                  * but didn't find one with the name "pass".  Either way,
 700                  * we return ENOENT, since we couldn't find something.
 701                  */
 702                 if (periph == NULL) {
 703                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 704                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 705                         *ccb->cgdl.periph_name = '\0';
 706                         ccb->cgdl.unit_number = 0;
 707                         error = ENOENT;
 708                         /*
 709                          * It is unfortunate that this is even necessary,
 710                          * but there are many, many clueless users out there.
 711                          * If this is true, the user is looking for the
 712                          * passthrough driver, but doesn't have one in his
 713                          * kernel.
 714                          */
 715                         if (base_periph_found == 1) {
 716                                 printf("xptioctl: pass driver is not in the "
 717                                        "kernel\n");
 718                                 printf("xptioctl: put \"device pass\" in "
 719                                        "your kernel config file\n");
 720                         }
 721                 }
 722                 xpt_unlock_buses();
 723                 break;
 724                 }
 725         default:
 726                 error = ENOTTY;
 727                 break;
 728         }
 729
 730         return(error);
 731 }
 732
 733 static int
 734 cam_module_event_handler(module_t mod, int what, void *arg)
 735 {
 736         int error;
 737
 738         switch (what) {
 739         case MOD_LOAD:
 740                 if ((error = xpt_init(NULL)) != 0)
 741                         return (error);
 742                 break;
 743         case MOD_UNLOAD:
 744                 return EBUSY;
 745         default:
 746                 return EOPNOTSUPP;
 747         }
 748
 749         return 0;
 750 }
 751
 752 static void
 753 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 754 {
 755
 756         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 757                 xpt_free_path(done_ccb->ccb_h.path);
 758                 xpt_free_ccb(done_ccb);
 759         } else {
 760                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 761                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 762         }
 763         xpt_release_boot();
 764 }
 765
 766 /* thread to handle bus rescans */
 767 static void
 768 xpt_scanner_thread(void *dummy)
 769 {
 770         union ccb       *ccb;
 771         struct cam_path  path;
 772
 773         xpt_lock_buses();
 774         for (;;) {
 775                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 776                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 777                                "-", 0);
 778                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 779                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 780                         xpt_unlock_buses();
 781
 782                         /*
 783                          * Since lock can be dropped inside and path freed
 784                          * by completion callback even before return here,
 785                          * take our own path copy for reference.
 786                          */
 787                         xpt_copy_path(&path, ccb->ccb_h.path);
 788                         xpt_path_lock(&path);
 789                         xpt_action(ccb);
 790                         xpt_path_unlock(&path);
 791                         xpt_release_path(&path);
 792
 793                         xpt_lock_buses();
 794                 }
 795         }
 796 }
 797
 798 void
 799 xpt_rescan(union ccb *ccb)
 800 {
 801         struct ccb_hdr *hdr;
 802
 803         /* Prepare request */
 804         if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
 805             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 806                 ccb->ccb_h.func_code = XPT_SCAN_BUS;
 807         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 808             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 809                 ccb->ccb_h.func_code = XPT_SCAN_TGT;
 810         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 811             ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
 812                 ccb->ccb_h.func_code = XPT_SCAN_LUN;
 813         else {
 814                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 815                 xpt_free_path(ccb->ccb_h.path);
 816                 xpt_free_ccb(ccb);
 817                 return;
 818         }
 819         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 820         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 821         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 822         /* Don't make duplicate entries for the same paths. */
 823         xpt_lock_buses();
 824         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 825                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 826                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 827                                 wakeup(&xsoftc.ccb_scanq);
 828                                 xpt_unlock_buses();
 829                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 830                                 xpt_free_path(ccb->ccb_h.path);
 831                                 xpt_free_ccb(ccb);
 832                                 return;
 833                         }
 834                 }
 835         }
 836         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 837         xsoftc.buses_to_config++;
 838         wakeup(&xsoftc.ccb_scanq);
 839         xpt_unlock_buses();
 840 }
 841
 842 /* Functions accessed by the peripheral drivers */
 843 static int
 844 xpt_init(void *dummy)
 845 {
 846         struct cam_sim *xpt_sim;
 847         struct cam_path *path;
 848         struct cam_devq *devq;
 849         cam_status status;
 850         int error, i;
 851
 852         TAILQ_INIT(&xsoftc.xpt_busses);
 853         TAILQ_INIT(&xsoftc.ccb_scanq);
 854         STAILQ_INIT(&xsoftc.highpowerq);
 855         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 856
 857         mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
 858         mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
 859         xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
 860             taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
 861
 862 #ifdef CAM_BOOT_DELAY
 863         /*
 864          * Override this value at compile time to assist our users
 865          * who don't use loader to boot a kernel.
 866          */
 867         xsoftc.boot_delay = CAM_BOOT_DELAY;
 868 #endif
 869         /*
 870          * The xpt layer is, itself, the equivelent of a SIM.
 871          * Allow 16 ccbs in the ccb pool for it.  This should
 872          * give decent parallelism when we probe busses and
 873          * perform other XPT functions.
 874          */
 875         devq = cam_simq_alloc(16);
 876         xpt_sim = cam_sim_alloc(xptaction,
 877                                 xptpoll,
 878                                 "xpt",
 879                                 /*softc*/NULL,
 880                                 /*unit*/0,
 881                                 /*mtx*/&xsoftc.xpt_lock,
 882                                 /*max_dev_transactions*/0,
 883                                 /*max_tagged_dev_transactions*/0,
 884                                 devq);
 885         if (xpt_sim == NULL)
 886                 return (ENOMEM);
 887
 888         mtx_lock(&xsoftc.xpt_lock);
 889         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 890                 mtx_unlock(&xsoftc.xpt_lock);
 891                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 892                        " failing attach\n", status);
 893                 return (EINVAL);
 894         }
 895         mtx_unlock(&xsoftc.xpt_lock);
 896
 897         /*
 898          * Looking at the XPT from the SIM layer, the XPT is
 899          * the equivelent of a peripheral driver.  Allocate
 900          * a peripheral driver entry for us.
 901          */
 902         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 903                                       CAM_TARGET_WILDCARD,
 904                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 905                 printf("xpt_init: xpt_create_path failed with status %#x,"
 906                        " failing attach\n", status);
 907                 return (EINVAL);
 908         }
 909         xpt_path_lock(path);
 910         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 911                          path, NULL, 0, xpt_sim);
 912         xpt_path_unlock(path);
 913         xpt_free_path(path);
 914
 915         if (cam_num_doneqs < 1)
 916                 cam_num_doneqs = 1 + mp_ncpus / 6;
 917         else if (cam_num_doneqs > MAXCPU)
 918                 cam_num_doneqs = MAXCPU;
 919         for (i = 0; i < cam_num_doneqs; i++) {
 920                 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 921                     MTX_DEF);
 922                 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
 923                 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 924                     &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 925                 if (error != 0) {
 926                         cam_num_doneqs = i;
 927                         break;
 928                 }
 929         }
 930         if (cam_num_doneqs < 1) {
 931                 printf("xpt_init: Cannot init completion queues "
 932                        "- failing attach\n");
 933                 return (ENOMEM);
 934         }
 935         /*
 936          * Register a callback for when interrupts are enabled.
 937          */
 938         xsoftc.xpt_config_hook =
 939             (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
 940                                               M_CAMXPT, M_NOWAIT | M_ZERO);
 941         if (xsoftc.xpt_config_hook == NULL) {
 942                 printf("xpt_init: Cannot malloc config hook "
 943                        "- failing attach\n");
 944                 return (ENOMEM);
 945         }
 946         xsoftc.xpt_config_hook->ich_func = xpt_config;
 947         if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
 948                 free (xsoftc.xpt_config_hook, M_CAMXPT);
 949                 printf("xpt_init: config_intrhook_establish failed "
 950                        "- failing attach\n");
 951         }
 952
 953         return (0);
 954 }
 955
 956 static cam_status
 957 xptregister(struct cam_periph *periph, void *arg)
 958 {
 959         struct cam_sim *xpt_sim;
 960
 961         if (periph == NULL) {
 962                 printf("xptregister: periph was NULL!!\n");
 963                 return(CAM_REQ_CMP_ERR);
 964         }
 965
 966         xpt_sim = (struct cam_sim *)arg;
 967         xpt_sim->softc = periph;
 968         xpt_periph = periph;
 969         periph->softc = NULL;
 970
 971         return(CAM_REQ_CMP);
 972 }
 973
 974 int32_t
 975 xpt_add_periph(struct cam_periph *periph)
 976 {
 977         struct cam_ed *device;
 978         int32_t  status;
 979
 980         TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
 981         device = periph->path->device;
 982         status = CAM_REQ_CMP;
 983         if (device != NULL) {
 984                 mtx_lock(&device->target->bus->eb_mtx);
 985                 device->generation++;
 986                 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
 987                 mtx_unlock(&device->target->bus->eb_mtx);
 988                 atomic_add_32(&xsoftc.xpt_generation, 1);
 989         }
 990
 991         return (status);
 992 }
 993
 994 void
 995 xpt_remove_periph(struct cam_periph *periph)
 996 {
 997         struct cam_ed *device;
 998
 999         device = periph->path->device;
1000         if (device != NULL) {
1001                 mtx_lock(&device->target->bus->eb_mtx);
1002                 device->generation++;
1003                 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1004                 mtx_unlock(&device->target->bus->eb_mtx);
1005                 atomic_add_32(&xsoftc.xpt_generation, 1);
1006         }
1007 }
1008
1009
1010 void
1011 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1012 {
1013         struct  cam_path *path = periph->path;
1014
1015         cam_periph_assert(periph, MA_OWNED);
1016         periph->flags |= CAM_PERIPH_ANNOUNCED;
1017
1018         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1019                periph->periph_name, periph->unit_number,
1020                path->bus->sim->sim_name,
1021                path->bus->sim->unit_number,
1022                path->bus->sim->bus_id,
1023                path->bus->path_id,
1024                path->target->target_id,
1025                (uintmax_t)path->device->lun_id);
1026         printf("%s%d: ", periph->periph_name, periph->unit_number);
1027         if (path->device->protocol == PROTO_SCSI)
1028                 scsi_print_inquiry(&path->device->inq_data);
1029         else if (path->device->protocol == PROTO_ATA ||
1030             path->device->protocol == PROTO_SATAPM)
1031                 ata_print_ident(&path->device->ident_data);
1032         else if (path->device->protocol == PROTO_SEMB)
1033                 semb_print_ident(
1034                     (struct sep_identify_data *)&path->device->ident_data);
1035         else
1036                 printf("Unknown protocol device\n");
1037         if (path->device->serial_num_len > 0) {
1038                 /* Don't wrap the screen  - print only the first 60 chars */
1039                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1040                        periph->unit_number, path->device->serial_num);
1041         }
1042         /* Announce transport details. */
1043         (*(path->bus->xport->announce))(periph);
1044         /* Announce command queueing. */
1045         if (path->device->inq_flags & SID_CmdQue
1046          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1047                 printf("%s%d: Command Queueing enabled\n",
1048                        periph->periph_name, periph->unit_number);
1049         }
1050         /* Announce caller's details if they've passed in. */
1051         if (announce_string != NULL)
1052                 printf("%s%d: %s\n", periph->periph_name,
1053                        periph->unit_number, announce_string);
1054 }
1055
1056 void
1057 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1058 {
1059         if (quirks != 0) {
1060                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1061                     periph->unit_number, quirks, bit_string);
1062         }
1063 }
1064
1065 void
1066 xpt_denounce_periph(struct cam_periph *periph)
1067 {
1068         struct  cam_path *path = periph->path;
1069
1070         cam_periph_assert(periph, MA_OWNED);
1071         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1072                periph->periph_name, periph->unit_number,
1073                path->bus->sim->sim_name,
1074                path->bus->sim->unit_number,
1075                path->bus->sim->bus_id,
1076                path->bus->path_id,
1077                path->target->target_id,
1078                (uintmax_t)path->device->lun_id);
1079         printf("%s%d: ", periph->periph_name, periph->unit_number);
1080         if (path->device->protocol == PROTO_SCSI)
1081                 scsi_print_inquiry_short(&path->device->inq_data);
1082         else if (path->device->protocol == PROTO_ATA ||
1083             path->device->protocol == PROTO_SATAPM)
1084                 ata_print_ident_short(&path->device->ident_data);
1085         else if (path->device->protocol == PROTO_SEMB)
1086                 semb_print_ident_short(
1087                     (struct sep_identify_data *)&path->device->ident_data);
1088         else
1089                 printf("Unknown protocol device");
1090         if (path->device->serial_num_len > 0)
1091                 printf(" s/n %.60s", path->device->serial_num);
1092         printf(" detached\n");
1093 }
1094
1095
1096 int
1097 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1098 {
1099         int ret = -1, l;
1100         struct ccb_dev_advinfo cdai;
1101         struct scsi_vpd_id_descriptor *idd;
1102
1103         xpt_path_assert(path, MA_OWNED);
1104
1105         memset(&cdai, 0, sizeof(cdai));
1106         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1107         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1108         cdai.flags = CDAI_FLAG_NONE;
1109         cdai.bufsiz = len;
1110
1111         if (!strcmp(attr, "GEOM::ident"))
1112                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1113         else if (!strcmp(attr, "GEOM::physpath"))
1114                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1115         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1116                  strcmp(attr, "GEOM::lunname") == 0) {
1117                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1118                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1119         } else
1120                 goto out;
1121
1122         cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1123         if (cdai.buf == NULL) {
1124                 ret = ENOMEM;
1125                 goto out;
1126         }
1127         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1128         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1129                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1130         if (cdai.provsiz == 0)
1131                 goto out;
1132         if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1133                 if (strcmp(attr, "GEOM::lunid") == 0) {
1134                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1135                             cdai.provsiz, scsi_devid_is_lun_naa);
1136                         if (idd == NULL)
1137                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1138                                     cdai.provsiz, scsi_devid_is_lun_eui64);
1139                 } else
1140                         idd = NULL;
1141                 if (idd == NULL)
1142                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1143                             cdai.provsiz, scsi_devid_is_lun_t10);
1144                 if (idd == NULL)
1145                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1146                             cdai.provsiz, scsi_devid_is_lun_name);
1147                 if (idd == NULL)
1148                         goto out;
1149                 ret = 0;
1150                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) {
1151                         if (idd->length < len) {
1152                                 for (l = 0; l < idd->length; l++)
1153                                         buf[l] = idd->identifier[l] ?
1154                                             idd->identifier[l] : ' ';
1155                                 buf[l] = 0;
1156                         } else
1157                                 ret = EFAULT;
1158                 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1159                         l = strnlen(idd->identifier, idd->length);
1160                         if (l < len) {
1161                                 bcopy(idd->identifier, buf, l);
1162                                 buf[l] = 0;
1163                         } else
1164                                 ret = EFAULT;
1165                 } else {
1166                         if (idd->length * 2 < len) {
1167                                 for (l = 0; l < idd->length; l++)
1168                                         sprintf(buf + l * 2, "%02x",
1169                                             idd->identifier[l]);
1170                         } else
1171                                 ret = EFAULT;
1172                 }
1173         } else {
1174                 ret = 0;
1175                 if (strlcpy(buf, cdai.buf, len) >= len)
1176                         ret = EFAULT;
1177         }
1178
1179 out:
1180         if (cdai.buf != NULL)
1181                 free(cdai.buf, M_CAMXPT);
1182         return ret;
1183 }
1184
1185 static dev_match_ret
1186 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1187             struct cam_eb *bus)
1188 {
1189         dev_match_ret retval;
1190         u_int i;
1191
1192         retval = DM_RET_NONE;
1193
1194         /*
1195          * If we aren't given something to match against, that's an error.
1196          */
1197         if (bus == NULL)
1198                 return(DM_RET_ERROR);
1199
1200         /*
1201          * If there are no match entries, then this bus matches no
1202          * matter what.
1203          */
1204         if ((patterns == NULL) || (num_patterns == 0))
1205                 return(DM_RET_DESCEND | DM_RET_COPY);
1206
1207         for (i = 0; i < num_patterns; i++) {
1208                 struct bus_match_pattern *cur_pattern;
1209
1210                 /*
1211                  * If the pattern in question isn't for a bus node, we
1212                  * aren't interested.  However, we do indicate to the
1213                  * calling routine that we should continue descending the
1214                  * tree, since the user wants to match against lower-level
1215                  * EDT elements.
1216                  */
1217                 if (patterns[i].type != DEV_MATCH_BUS) {
1218                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1219                                 retval |= DM_RET_DESCEND;
1220                         continue;
1221                 }
1222
1223                 cur_pattern = &patterns[i].pattern.bus_pattern;
1224
1225                 /*
1226                  * If they want to match any bus node, we give them any
1227                  * device node.
1228                  */
1229                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1230                         /* set the copy flag */
1231                         retval |= DM_RET_COPY;
1232
1233                         /*
1234                          * If we've already decided on an action, go ahead
1235                          * and return.
1236                          */
1237                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1238                                 return(retval);
1239                 }
1240
1241                 /*
1242                  * Not sure why someone would do this...
1243                  */
1244                 if (cur_pattern->flags == BUS_MATCH_NONE)
1245                         continue;
1246
1247                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1248                  && (cur_pattern->path_id != bus->path_id))
1249                         continue;
1250
1251                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1252                  && (cur_pattern->bus_id != bus->sim->bus_id))
1253                         continue;
1254
1255                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1256                  && (cur_pattern->unit_number != bus->sim->unit_number))
1257                         continue;
1258
1259                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1260                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1261                              DEV_IDLEN) != 0))
1262                         continue;
1263
1264                 /*
1265                  * If we get to this point, the user definitely wants
1266                  * information on this bus.  So tell the caller to copy the
1267                  * data out.
1268                  */
1269                 retval |= DM_RET_COPY;
1270
1271                 /*
1272                  * If the return action has been set to descend, then we
1273                  * know that we've already seen a non-bus matching
1274                  * expression, therefore we need to further descend the tree.
1275                  * This won't change by continuing around the loop, so we
1276                  * go ahead and return.  If we haven't seen a non-bus
1277                  * matching expression, we keep going around the loop until
1278                  * we exhaust the matching expressions.  We'll set the stop
1279                  * flag once we fall out of the loop.
1280                  */
1281                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1282                         return(retval);
1283         }
1284
1285         /*
1286          * If the return action hasn't been set to descend yet, that means
1287          * we haven't seen anything other than bus matching patterns.  So
1288          * tell the caller to stop descending the tree -- the user doesn't
1289          * want to match against lower level tree elements.
1290          */
1291         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1292                 retval |= DM_RET_STOP;
1293
1294         return(retval);
1295 }
1296
1297 static dev_match_ret
1298 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1299                struct cam_ed *device)
1300 {
1301         dev_match_ret retval;
1302         u_int i;
1303
1304         retval = DM_RET_NONE;
1305
1306         /*
1307          * If we aren't given something to match against, that's an error.
1308          */
1309         if (device == NULL)
1310                 return(DM_RET_ERROR);
1311
1312         /*
1313          * If there are no match entries, then this device matches no
1314          * matter what.
1315          */
1316         if ((patterns == NULL) || (num_patterns == 0))
1317                 return(DM_RET_DESCEND | DM_RET_COPY);
1318
1319         for (i = 0; i < num_patterns; i++) {
1320                 struct device_match_pattern *cur_pattern;
1321                 struct scsi_vpd_device_id *device_id_page;
1322
1323                 /*
1324                  * If the pattern in question isn't for a device node, we
1325                  * aren't interested.
1326                  */
1327                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1328                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1329                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1330                                 retval |= DM_RET_DESCEND;
1331                         continue;
1332                 }
1333
1334                 cur_pattern = &patterns[i].pattern.device_pattern;
1335
1336                 /* Error out if mutually exclusive options are specified. */
1337                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1338                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1339                         return(DM_RET_ERROR);
1340
1341                 /*
1342                  * If they want to match any device node, we give them any
1343                  * device node.
1344                  */
1345                 if (cur_pattern->flags == DEV_MATCH_ANY)
1346                         goto copy_dev_node;
1347
1348                 /*
1349                  * Not sure why someone would do this...
1350                  */
1351                 if (cur_pattern->flags == DEV_MATCH_NONE)
1352                         continue;
1353
1354                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1355                  && (cur_pattern->path_id != device->target->bus->path_id))
1356                         continue;
1357
1358                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1359                  && (cur_pattern->target_id != device->target->target_id))
1360                         continue;
1361
1362                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1363                  && (cur_pattern->target_lun != device->lun_id))
1364                         continue;
1365
1366                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1367                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1368                                     (caddr_t)&cur_pattern->data.inq_pat,
1369                                     1, sizeof(cur_pattern->data.inq_pat),
1370                                     scsi_static_inquiry_match) == NULL))
1371                         continue;
1372
1373                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1374                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1375                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1376                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1377                                       device->device_id_len
1378                                     - SVPD_DEVICE_ID_HDR_LEN,
1379                                       cur_pattern->data.devid_pat.id,
1380                                       cur_pattern->data.devid_pat.id_len) != 0))
1381                         continue;
1382
1383 copy_dev_node:
1384                 /*
1385                  * If we get to this point, the user definitely wants
1386                  * information on this device.  So tell the caller to copy
1387                  * the data out.
1388                  */
1389                 retval |= DM_RET_COPY;
1390
1391                 /*
1392                  * If the return action has been set to descend, then we
1393                  * know that we've already seen a peripheral matching
1394                  * expression, therefore we need to further descend the tree.
1395                  * This won't change by continuing around the loop, so we
1396                  * go ahead and return.  If we haven't seen a peripheral
1397                  * matching expression, we keep going around the loop until
1398                  * we exhaust the matching expressions.  We'll set the stop
1399                  * flag once we fall out of the loop.
1400                  */
1401                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1402                         return(retval);
1403         }
1404
1405         /*
1406          * If the return action hasn't been set to descend yet, that means
1407          * we haven't seen any peripheral matching patterns.  So tell the
1408          * caller to stop descending the tree -- the user doesn't want to
1409          * match against lower level tree elements.
1410          */
1411         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1412                 retval |= DM_RET_STOP;
1413
1414         return(retval);
1415 }
1416
1417 /*
1418  * Match a single peripheral against any number of match patterns.
1419  */
1420 static dev_match_ret
1421 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1422                struct cam_periph *periph)
1423 {
1424         dev_match_ret retval;
1425         u_int i;
1426
1427         /*
1428          * If we aren't given something to match against, that's an error.
1429          */
1430         if (periph == NULL)
1431                 return(DM_RET_ERROR);
1432
1433         /*
1434          * If there are no match entries, then this peripheral matches no
1435          * matter what.
1436          */
1437         if ((patterns == NULL) || (num_patterns == 0))
1438                 return(DM_RET_STOP | DM_RET_COPY);
1439
1440         /*
1441          * There aren't any nodes below a peripheral node, so there's no
1442          * reason to descend the tree any further.
1443          */
1444         retval = DM_RET_STOP;
1445
1446         for (i = 0; i < num_patterns; i++) {
1447                 struct periph_match_pattern *cur_pattern;
1448
1449                 /*
1450                  * If the pattern in question isn't for a peripheral, we
1451                  * aren't interested.
1452                  */
1453                 if (patterns[i].type != DEV_MATCH_PERIPH)
1454                         continue;
1455
1456                 cur_pattern = &patterns[i].pattern.periph_pattern;
1457
1458                 /*
1459                  * If they want to match on anything, then we will do so.
1460                  */
1461                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1462                         /* set the copy flag */
1463                         retval |= DM_RET_COPY;
1464
1465                         /*
1466                          * We've already set the return action to stop,
1467                          * since there are no nodes below peripherals in
1468                          * the tree.
1469                          */
1470                         return(retval);
1471                 }
1472
1473                 /*
1474                  * Not sure why someone would do this...
1475                  */
1476                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1477                         continue;
1478
1479                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1480                  && (cur_pattern->path_id != periph->path->bus->path_id))
1481                         continue;
1482
1483                 /*
1484                  * For the target and lun id's, we have to make sure the
1485                  * target and lun pointers aren't NULL.  The xpt peripheral
1486                  * has a wildcard target and device.
1487                  */
1488                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1489                  && ((periph->path->target == NULL)
1490                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1491                         continue;
1492
1493                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1494                  && ((periph->path->device == NULL)
1495                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1496                         continue;
1497
1498                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1499                  && (cur_pattern->unit_number != periph->unit_number))
1500                         continue;
1501
1502                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1503                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1504                              DEV_IDLEN) != 0))
1505                         continue;
1506
1507                 /*
1508                  * If we get to this point, the user definitely wants
1509                  * information on this peripheral.  So tell the caller to
1510                  * copy the data out.
1511                  */
1512                 retval |= DM_RET_COPY;
1513
1514                 /*
1515                  * The return action has already been set to stop, since
1516                  * peripherals don't have any nodes below them in the EDT.
1517                  */
1518                 return(retval);
1519         }
1520
1521         /*
1522          * If we get to this point, the peripheral that was passed in
1523          * doesn't match any of the patterns.
1524          */
1525         return(retval);
1526 }
1527
1528 static int
1529 xptedtbusfunc(struct cam_eb *bus, void *arg)
1530 {
1531         struct ccb_dev_match *cdm;
1532         struct cam_et *target;
1533         dev_match_ret retval;
1534
1535         cdm = (struct ccb_dev_match *)arg;
1536
1537         /*
1538          * If our position is for something deeper in the tree, that means
1539          * that we've already seen this node.  So, we keep going down.
1540          */
1541         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1542          && (cdm->pos.cookie.bus == bus)
1543          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1544          && (cdm->pos.cookie.target != NULL))
1545                 retval = DM_RET_DESCEND;
1546         else
1547                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1548
1549         /*
1550          * If we got an error, bail out of the search.
1551          */
1552         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1553                 cdm->status = CAM_DEV_MATCH_ERROR;
1554                 return(0);
1555         }
1556
1557         /*
1558          * If the copy flag is set, copy this bus out.
1559          */
1560         if (retval & DM_RET_COPY) {
1561                 int spaceleft, j;
1562
1563                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1564                         sizeof(struct dev_match_result));
1565
1566                 /*
1567                  * If we don't have enough space to put in another
1568                  * match result, save our position and tell the
1569                  * user there are more devices to check.
1570                  */
1571                 if (spaceleft < sizeof(struct dev_match_result)) {
1572                         bzero(&cdm->pos, sizeof(cdm->pos));
1573                         cdm->pos.position_type =
1574                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1575
1576                         cdm->pos.cookie.bus = bus;
1577                         cdm->pos.generations[CAM_BUS_GENERATION]=
1578                                 xsoftc.bus_generation;
1579                         cdm->status = CAM_DEV_MATCH_MORE;
1580                         return(0);
1581                 }
1582                 j = cdm->num_matches;
1583                 cdm->num_matches++;
1584                 cdm->matches[j].type = DEV_MATCH_BUS;
1585                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1586                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1587                 cdm->matches[j].result.bus_result.unit_number =
1588                         bus->sim->unit_number;
1589                 strncpy(cdm->matches[j].result.bus_result.dev_name,
1590                         bus->sim->sim_name, DEV_IDLEN);
1591         }
1592
1593         /*
1594          * If the user is only interested in busses, there's no
1595          * reason to descend to the next level in the tree.
1596          */
1597         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1598                 return(1);
1599
1600         /*
1601          * If there is a target generation recorded, check it to
1602          * make sure the target list hasn't changed.
1603          */
1604         mtx_lock(&bus->eb_mtx);
1605         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1606          && (cdm->pos.cookie.bus == bus)
1607          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1608          && (cdm->pos.cookie.target != NULL)) {
1609                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1610                     bus->generation)) {
1611                         mtx_unlock(&bus->eb_mtx);
1612                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1613                         return (0);
1614                 }
1615                 target = (struct cam_et *)cdm->pos.cookie.target;
1616                 target->refcount++;
1617         } else
1618                 target = NULL;
1619         mtx_unlock(&bus->eb_mtx);
1620
1621         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1622 }
1623
1624 static int
1625 xptedttargetfunc(struct cam_et *target, void *arg)
1626 {
1627         struct ccb_dev_match *cdm;
1628         struct cam_eb *bus;
1629         struct cam_ed *device;
1630
1631         cdm = (struct ccb_dev_match *)arg;
1632         bus = target->bus;
1633
1634         /*
1635          * If there is a device list generation recorded, check it to
1636          * make sure the device list hasn't changed.
1637          */
1638         mtx_lock(&bus->eb_mtx);
1639         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1640          && (cdm->pos.cookie.bus == bus)
1641          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1642          && (cdm->pos.cookie.target == target)
1643          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1644          && (cdm->pos.cookie.device != NULL)) {
1645                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1646                     target->generation) {
1647                         mtx_unlock(&bus->eb_mtx);
1648                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1649                         return(0);
1650                 }
1651                 device = (struct cam_ed *)cdm->pos.cookie.device;
1652                 device->refcount++;
1653         } else
1654                 device = NULL;
1655         mtx_unlock(&bus->eb_mtx);
1656
1657         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1658 }
1659
1660 static int
1661 xptedtdevicefunc(struct cam_ed *device, void *arg)
1662 {
1663         struct cam_eb *bus;
1664         struct cam_periph *periph;
1665         struct ccb_dev_match *cdm;
1666         dev_match_ret retval;
1667
1668         cdm = (struct ccb_dev_match *)arg;
1669         bus = device->target->bus;
1670
1671         /*
1672          * If our position is for something deeper in the tree, that means
1673          * that we've already seen this node.  So, we keep going down.
1674          */
1675         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1676          && (cdm->pos.cookie.device == device)
1677          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1678          && (cdm->pos.cookie.periph != NULL))
1679                 retval = DM_RET_DESCEND;
1680         else
1681                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1682                                         device);
1683
1684         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1685                 cdm->status = CAM_DEV_MATCH_ERROR;
1686                 return(0);
1687         }
1688
1689         /*
1690          * If the copy flag is set, copy this device out.
1691          */
1692         if (retval & DM_RET_COPY) {
1693                 int spaceleft, j;
1694
1695                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1696                         sizeof(struct dev_match_result));
1697
1698                 /*
1699                  * If we don't have enough space to put in another
1700                  * match result, save our position and tell the
1701                  * user there are more devices to check.
1702                  */
1703                 if (spaceleft < sizeof(struct dev_match_result)) {
1704                         bzero(&cdm->pos, sizeof(cdm->pos));
1705                         cdm->pos.position_type =
1706                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1707                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1708
1709                         cdm->pos.cookie.bus = device->target->bus;
1710                         cdm->pos.generations[CAM_BUS_GENERATION]=
1711                                 xsoftc.bus_generation;
1712                         cdm->pos.cookie.target = device->target;
1713                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1714                                 device->target->bus->generation;
1715                         cdm->pos.cookie.device = device;
1716                         cdm->pos.generations[CAM_DEV_GENERATION] =
1717                                 device->target->generation;
1718                         cdm->status = CAM_DEV_MATCH_MORE;
1719                         return(0);
1720                 }
1721                 j = cdm->num_matches;
1722                 cdm->num_matches++;
1723                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1724                 cdm->matches[j].result.device_result.path_id =
1725                         device->target->bus->path_id;
1726                 cdm->matches[j].result.device_result.target_id =
1727                         device->target->target_id;
1728                 cdm->matches[j].result.device_result.target_lun =
1729                         device->lun_id;
1730                 cdm->matches[j].result.device_result.protocol =
1731                         device->protocol;
1732                 bcopy(&device->inq_data,
1733                       &cdm->matches[j].result.device_result.inq_data,
1734                       sizeof(struct scsi_inquiry_data));
1735                 bcopy(&device->ident_data,
1736                       &cdm->matches[j].result.device_result.ident_data,
1737                       sizeof(struct ata_params));
1738
1739                 /* Let the user know whether this device is unconfigured */
1740                 if (device->flags & CAM_DEV_UNCONFIGURED)
1741                         cdm->matches[j].result.device_result.flags =
1742                                 DEV_RESULT_UNCONFIGURED;
1743                 else
1744                         cdm->matches[j].result.device_result.flags =
1745                                 DEV_RESULT_NOFLAG;
1746         }
1747
1748         /*
1749          * If the user isn't interested in peripherals, don't descend
1750          * the tree any further.
1751          */
1752         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1753                 return(1);
1754
1755         /*
1756          * If there is a peripheral list generation recorded, make sure
1757          * it hasn't changed.
1758          */
1759         xpt_lock_buses();
1760         mtx_lock(&bus->eb_mtx);
1761         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1762          && (cdm->pos.cookie.bus == bus)
1763          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1764          && (cdm->pos.cookie.target == device->target)
1765          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1766          && (cdm->pos.cookie.device == device)
1767          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1768          && (cdm->pos.cookie.periph != NULL)) {
1769                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1770                     device->generation) {
1771                         mtx_unlock(&bus->eb_mtx);
1772                         xpt_unlock_buses();
1773                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1774                         return(0);
1775                 }
1776                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1777                 periph->refcount++;
1778         } else
1779                 periph = NULL;
1780         mtx_unlock(&bus->eb_mtx);
1781         xpt_unlock_buses();
1782
1783         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1784 }
1785
1786 static int
1787 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1788 {
1789         struct ccb_dev_match *cdm;
1790         dev_match_ret retval;
1791
1792         cdm = (struct ccb_dev_match *)arg;
1793
1794         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1795
1796         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1797                 cdm->status = CAM_DEV_MATCH_ERROR;
1798                 return(0);
1799         }
1800
1801         /*
1802          * If the copy flag is set, copy this peripheral out.
1803          */
1804         if (retval & DM_RET_COPY) {
1805                 int spaceleft, j;
1806
1807                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1808                         sizeof(struct dev_match_result));
1809
1810                 /*
1811                  * If we don't have enough space to put in another
1812                  * match result, save our position and tell the
1813                  * user there are more devices to check.
1814                  */
1815                 if (spaceleft < sizeof(struct dev_match_result)) {
1816                         bzero(&cdm->pos, sizeof(cdm->pos));
1817                         cdm->pos.position_type =
1818                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1819                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1820                                 CAM_DEV_POS_PERIPH;
1821
1822                         cdm->pos.cookie.bus = periph->path->bus;
1823                         cdm->pos.generations[CAM_BUS_GENERATION]=
1824                                 xsoftc.bus_generation;
1825                         cdm->pos.cookie.target = periph->path->target;
1826                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1827                                 periph->path->bus->generation;
1828                         cdm->pos.cookie.device = periph->path->device;
1829                         cdm->pos.generations[CAM_DEV_GENERATION] =
1830                                 periph->path->target->generation;
1831                         cdm->pos.cookie.periph = periph;
1832                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1833                                 periph->path->device->generation;
1834                         cdm->status = CAM_DEV_MATCH_MORE;
1835                         return(0);
1836                 }
1837
1838                 j = cdm->num_matches;
1839                 cdm->num_matches++;
1840                 cdm->matches[j].type = DEV_MATCH_PERIPH;
1841                 cdm->matches[j].result.periph_result.path_id =
1842                         periph->path->bus->path_id;
1843                 cdm->matches[j].result.periph_result.target_id =
1844                         periph->path->target->target_id;
1845                 cdm->matches[j].result.periph_result.target_lun =
1846                         periph->path->device->lun_id;
1847                 cdm->matches[j].result.periph_result.unit_number =
1848                         periph->unit_number;
1849                 strncpy(cdm->matches[j].result.periph_result.periph_name,
1850                         periph->periph_name, DEV_IDLEN);
1851         }
1852
1853         return(1);
1854 }
1855
1856 static int
1857 xptedtmatch(struct ccb_dev_match *cdm)
1858 {
1859         struct cam_eb *bus;
1860         int ret;
1861
1862         cdm->num_matches = 0;
1863
1864         /*
1865          * Check the bus list generation.  If it has changed, the user
1866          * needs to reset everything and start over.
1867          */
1868         xpt_lock_buses();
1869         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1870          && (cdm->pos.cookie.bus != NULL)) {
1871                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
1872                     xsoftc.bus_generation) {
1873                         xpt_unlock_buses();
1874                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1875                         return(0);
1876                 }
1877                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
1878                 bus->refcount++;
1879         } else
1880                 bus = NULL;
1881         xpt_unlock_buses();
1882
1883         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
1884
1885         /*
1886          * If we get back 0, that means that we had to stop before fully
1887          * traversing the EDT.  It also means that one of the subroutines
1888          * has set the status field to the proper value.  If we get back 1,
1889          * we've fully traversed the EDT and copied out any matching entries.
1890          */
1891         if (ret == 1)
1892                 cdm->status = CAM_DEV_MATCH_LAST;
1893
1894         return(ret);
1895 }
1896
1897 static int
1898 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
1899 {
1900         struct cam_periph *periph;
1901         struct ccb_dev_match *cdm;
1902
1903         cdm = (struct ccb_dev_match *)arg;
1904
1905         xpt_lock_buses();
1906         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1907          && (cdm->pos.cookie.pdrv == pdrv)
1908          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1909          && (cdm->pos.cookie.periph != NULL)) {
1910                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1911                     (*pdrv)->generation) {
1912                         xpt_unlock_buses();
1913                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1914                         return(0);
1915                 }
1916                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1917                 periph->refcount++;
1918         } else
1919                 periph = NULL;
1920         xpt_unlock_buses();
1921
1922         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
1923 }
1924
1925 static int
1926 xptplistperiphfunc(struct cam_periph *periph, void *arg)
1927 {
1928         struct ccb_dev_match *cdm;
1929         dev_match_ret retval;
1930
1931         cdm = (struct ccb_dev_match *)arg;
1932
1933         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1934
1935         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1936                 cdm->status = CAM_DEV_MATCH_ERROR;
1937                 return(0);
1938         }
1939
1940         /*
1941          * If the copy flag is set, copy this peripheral out.
1942          */
1943         if (retval & DM_RET_COPY) {
1944                 int spaceleft, j;
1945
1946                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1947                         sizeof(struct dev_match_result));
1948
1949                 /*
1950                  * If we don't have enough space to put in another
1951                  * match result, save our position and tell the
1952                  * user there are more devices to check.
1953                  */
1954                 if (spaceleft < sizeof(struct dev_match_result)) {
1955                         struct periph_driver **pdrv;
1956
1957                         pdrv = NULL;
1958                         bzero(&cdm->pos, sizeof(cdm->pos));
1959                         cdm->pos.position_type =
1960                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
1961                                 CAM_DEV_POS_PERIPH;
1962
1963                         /*
1964                          * This may look a bit non-sensical, but it is
1965                          * actually quite logical.  There are very few
1966                          * peripheral drivers, and bloating every peripheral
1967                          * structure with a pointer back to its parent
1968                          * peripheral driver linker set entry would cost
1969                          * more in the long run than doing this quick lookup.
1970                          */
1971                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
1972                                 if (strcmp((*pdrv)->driver_name,
1973                                     periph->periph_name) == 0)
1974                                         break;
1975                         }
1976
1977                         if (*pdrv == NULL) {
1978                                 cdm->status = CAM_DEV_MATCH_ERROR;
1979                                 return(0);
1980                         }
1981
1982                         cdm->pos.cookie.pdrv = pdrv;
1983                         /*
1984                          * The periph generation slot does double duty, as
1985                          * does the periph pointer slot.  They are used for
1986                          * both edt and pdrv lookups and positioning.
1987                          */
1988                         cdm->pos.cookie.periph = periph;
1989                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1990                                 (*pdrv)->generation;
1991                         cdm->status = CAM_DEV_MATCH_MORE;
1992                         return(0);
1993                 }
1994
1995                 j = cdm->num_matches;
1996                 cdm->num_matches++;
1997                 cdm->matches[j].type = DEV_MATCH_PERIPH;
1998                 cdm->matches[j].result.periph_result.path_id =
1999                         periph->path->bus->path_id;
2000
2001                 /*
2002                  * The transport layer peripheral doesn't have a target or
2003                  * lun.
2004                  */
2005                 if (periph->path->target)
2006                         cdm->matches[j].result.periph_result.target_id =
2007                                 periph->path->target->target_id;
2008                 else
2009                         cdm->matches[j].result.periph_result.target_id =
2010                                 CAM_TARGET_WILDCARD;
2011
2012                 if (periph->path->device)
2013                         cdm->matches[j].result.periph_result.target_lun =
2014                                 periph->path->device->lun_id;
2015                 else
2016                         cdm->matches[j].result.periph_result.target_lun =
2017                                 CAM_LUN_WILDCARD;
2018
2019                 cdm->matches[j].result.periph_result.unit_number =
2020                         periph->unit_number;
2021                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2022                         periph->periph_name, DEV_IDLEN);
2023         }
2024
2025         return(1);
2026 }
2027
2028 static int
2029 xptperiphlistmatch(struct ccb_dev_match *cdm)
2030 {
2031         int ret;
2032
2033         cdm->num_matches = 0;
2034
2035         /*
2036          * At this point in the edt traversal function, we check the bus
2037          * list generation to make sure that no busses have been added or
2038          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2039          * For the peripheral driver list traversal function, however, we
2040          * don't have to worry about new peripheral driver types coming or
2041          * going; they're in a linker set, and therefore can't change
2042          * without a recompile.
2043          */
2044
2045         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2046          && (cdm->pos.cookie.pdrv != NULL))
2047                 ret = xptpdrvtraverse(
2048                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2049                                 xptplistpdrvfunc, cdm);
2050         else
2051                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2052
2053         /*
2054          * If we get back 0, that means that we had to stop before fully
2055          * traversing the peripheral driver tree.  It also means that one of
2056          * the subroutines has set the status field to the proper value.  If
2057          * we get back 1, we've fully traversed the EDT and copied out any
2058          * matching entries.
2059          */
2060         if (ret == 1)
2061                 cdm->status = CAM_DEV_MATCH_LAST;
2062
2063         return(ret);
2064 }
2065
2066 static int
2067 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2068 {
2069         struct cam_eb *bus, *next_bus;
2070         int retval;
2071
2072         retval = 1;
2073         if (start_bus)
2074                 bus = start_bus;
2075         else {
2076                 xpt_lock_buses();
2077                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2078                 if (bus == NULL) {
2079                         xpt_unlock_buses();
2080                         return (retval);
2081                 }
2082                 bus->refcount++;
2083                 xpt_unlock_buses();
2084         }
2085         for (; bus != NULL; bus = next_bus) {
2086                 retval = tr_func(bus, arg);
2087                 if (retval == 0) {
2088                         xpt_release_bus(bus);
2089                         break;
2090                 }
2091                 xpt_lock_buses();
2092                 next_bus = TAILQ_NEXT(bus, links);
2093                 if (next_bus)
2094                         next_bus->refcount++;
2095                 xpt_unlock_buses();
2096                 xpt_release_bus(bus);
2097         }
2098         return(retval);
2099 }
2100
2101 static int
2102 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2103                   xpt_targetfunc_t *tr_func, void *arg)
2104 {
2105         struct cam_et *target, *next_target;
2106         int retval;
2107
2108         retval = 1;
2109         if (start_target)
2110                 target = start_target;
2111         else {
2112                 mtx_lock(&bus->eb_mtx);
2113                 target = TAILQ_FIRST(&bus->et_entries);
2114                 if (target == NULL) {
2115                         mtx_unlock(&bus->eb_mtx);
2116                         return (retval);
2117                 }
2118                 target->refcount++;
2119                 mtx_unlock(&bus->eb_mtx);
2120         }
2121         for (; target != NULL; target = next_target) {
2122                 retval = tr_func(target, arg);
2123                 if (retval == 0) {
2124                         xpt_release_target(target);
2125                         break;
2126                 }
2127                 mtx_lock(&bus->eb_mtx);
2128                 next_target = TAILQ_NEXT(target, links);
2129                 if (next_target)
2130                         next_target->refcount++;
2131                 mtx_unlock(&bus->eb_mtx);
2132                 xpt_release_target(target);
2133         }
2134         return(retval);
2135 }
2136
2137 static int
2138 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2139                   xpt_devicefunc_t *tr_func, void *arg)
2140 {
2141         struct cam_eb *bus;
2142         struct cam_ed *device, *next_device;
2143         int retval;
2144
2145         retval = 1;
2146         bus = target->bus;
2147         if (start_device)
2148                 device = start_device;
2149         else {
2150                 mtx_lock(&bus->eb_mtx);
2151                 device = TAILQ_FIRST(&target->ed_entries);
2152                 if (device == NULL) {
2153                         mtx_unlock(&bus->eb_mtx);
2154                         return (retval);
2155                 }
2156                 device->refcount++;
2157                 mtx_unlock(&bus->eb_mtx);
2158         }
2159         for (; device != NULL; device = next_device) {
2160                 mtx_lock(&device->device_mtx);
2161                 retval = tr_func(device, arg);
2162                 mtx_unlock(&device->device_mtx);
2163                 if (retval == 0) {
2164                         xpt_release_device(device);
2165                         break;
2166                 }
2167                 mtx_lock(&bus->eb_mtx);
2168                 next_device = TAILQ_NEXT(device, links);
2169                 if (next_device)
2170                         next_device->refcount++;
2171                 mtx_unlock(&bus->eb_mtx);
2172                 xpt_release_device(device);
2173         }
2174         return(retval);
2175 }
2176
2177 static int
2178 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2179                   xpt_periphfunc_t *tr_func, void *arg)
2180 {
2181         struct cam_eb *bus;
2182         struct cam_periph *periph, *next_periph;
2183         int retval;
2184
2185         retval = 1;
2186
2187         bus = device->target->bus;
2188         if (start_periph)
2189                 periph = start_periph;
2190         else {
2191                 xpt_lock_buses();
2192                 mtx_lock(&bus->eb_mtx);
2193                 periph = SLIST_FIRST(&device->periphs);
2194                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2195                         periph = SLIST_NEXT(periph, periph_links);
2196                 if (periph == NULL) {
2197                         mtx_unlock(&bus->eb_mtx);
2198                         xpt_unlock_buses();
2199                         return (retval);
2200                 }
2201                 periph->refcount++;
2202                 mtx_unlock(&bus->eb_mtx);
2203                 xpt_unlock_buses();
2204         }
2205         for (; periph != NULL; periph = next_periph) {
2206                 retval = tr_func(periph, arg);
2207                 if (retval == 0) {
2208                         cam_periph_release_locked(periph);
2209                         break;
2210                 }
2211                 xpt_lock_buses();
2212                 mtx_lock(&bus->eb_mtx);
2213                 next_periph = SLIST_NEXT(periph, periph_links);
2214                 while (next_periph != NULL &&
2215                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2216                         next_periph = SLIST_NEXT(next_periph, periph_links);
2217                 if (next_periph)
2218                         next_periph->refcount++;
2219                 mtx_unlock(&bus->eb_mtx);
2220                 xpt_unlock_buses();
2221                 cam_periph_release_locked(periph);
2222         }
2223         return(retval);
2224 }
2225
2226 static int
2227 xptpdrvtraverse(struct periph_driver **start_pdrv,
2228                 xpt_pdrvfunc_t *tr_func, void *arg)
2229 {
2230         struct periph_driver **pdrv;
2231         int retval;
2232
2233         retval = 1;
2234
2235         /*
2236          * We don't traverse the peripheral driver list like we do the
2237          * other lists, because it is a linker set, and therefore cannot be
2238          * changed during runtime.  If the peripheral driver list is ever
2239          * re-done to be something other than a linker set (i.e. it can
2240          * change while the system is running), the list traversal should
2241          * be modified to work like the other traversal functions.
2242          */
2243         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2244              *pdrv != NULL; pdrv++) {
2245                 retval = tr_func(pdrv, arg);
2246
2247                 if (retval == 0)
2248                         return(retval);
2249         }
2250
2251         return(retval);
2252 }
2253
2254 static int
2255 xptpdperiphtraverse(struct periph_driver **pdrv,
2256                     struct cam_periph *start_periph,
2257                     xpt_periphfunc_t *tr_func, void *arg)
2258 {
2259         struct cam_periph *periph, *next_periph;
2260         int retval;
2261
2262         retval = 1;
2263
2264         if (start_periph)
2265                 periph = start_periph;
2266         else {
2267                 xpt_lock_buses();
2268                 periph = TAILQ_FIRST(&(*pdrv)->units);
2269                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2270                         periph = TAILQ_NEXT(periph, unit_links);
2271                 if (periph == NULL) {
2272                         xpt_unlock_buses();
2273                         return (retval);
2274                 }
2275                 periph->refcount++;
2276                 xpt_unlock_buses();
2277         }
2278         for (; periph != NULL; periph = next_periph) {
2279                 cam_periph_lock(periph);
2280                 retval = tr_func(periph, arg);
2281                 cam_periph_unlock(periph);
2282                 if (retval == 0) {
2283                         cam_periph_release(periph);
2284                         break;
2285                 }
2286                 xpt_lock_buses();
2287                 next_periph = TAILQ_NEXT(periph, unit_links);
2288                 while (next_periph != NULL &&
2289                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2290                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2291                 if (next_periph)
2292                         next_periph->refcount++;
2293                 xpt_unlock_buses();
2294                 cam_periph_release(periph);
2295         }
2296         return(retval);
2297 }
2298
2299 static int
2300 xptdefbusfunc(struct cam_eb *bus, void *arg)
2301 {
2302         struct xpt_traverse_config *tr_config;
2303
2304         tr_config = (struct xpt_traverse_config *)arg;
2305
2306         if (tr_config->depth == XPT_DEPTH_BUS) {
2307                 xpt_busfunc_t *tr_func;
2308
2309                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2310
2311                 return(tr_func(bus, tr_config->tr_arg));
2312         } else
2313                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2314 }
2315
2316 static int
2317 xptdeftargetfunc(struct cam_et *target, void *arg)
2318 {
2319         struct xpt_traverse_config *tr_config;
2320
2321         tr_config = (struct xpt_traverse_config *)arg;
2322
2323         if (tr_config->depth == XPT_DEPTH_TARGET) {
2324                 xpt_targetfunc_t *tr_func;
2325
2326                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2327
2328                 return(tr_func(target, tr_config->tr_arg));
2329         } else
2330                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2331 }
2332
2333 static int
2334 xptdefdevicefunc(struct cam_ed *device, void *arg)
2335 {
2336         struct xpt_traverse_config *tr_config;
2337
2338         tr_config = (struct xpt_traverse_config *)arg;
2339
2340         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2341                 xpt_devicefunc_t *tr_func;
2342
2343                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2344
2345                 return(tr_func(device, tr_config->tr_arg));
2346         } else
2347                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2348 }
2349
2350 static int
2351 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2352 {
2353         struct xpt_traverse_config *tr_config;
2354         xpt_periphfunc_t *tr_func;
2355
2356         tr_config = (struct xpt_traverse_config *)arg;
2357
2358         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2359
2360         /*
2361          * Unlike the other default functions, we don't check for depth
2362          * here.  The peripheral driver level is the last level in the EDT,
2363          * so if we're here, we should execute the function in question.
2364          */
2365         return(tr_func(periph, tr_config->tr_arg));
2366 }
2367
2368 /*
2369  * Execute the given function for every bus in the EDT.
2370  */
2371 static int
2372 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2373 {
2374         struct xpt_traverse_config tr_config;
2375
2376         tr_config.depth = XPT_DEPTH_BUS;
2377         tr_config.tr_func = tr_func;
2378         tr_config.tr_arg = arg;
2379
2380         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2381 }
2382
2383 /*
2384  * Execute the given function for every device in the EDT.
2385  */
2386 static int
2387 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2388 {
2389         struct xpt_traverse_config tr_config;
2390
2391         tr_config.depth = XPT_DEPTH_DEVICE;
2392         tr_config.tr_func = tr_func;
2393         tr_config.tr_arg = arg;
2394
2395         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2396 }
2397
2398 static int
2399 xptsetasyncfunc(struct cam_ed *device, void *arg)
2400 {
2401         struct cam_path path;
2402         struct ccb_getdev cgd;
2403         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2404
2405         /*
2406          * Don't report unconfigured devices (Wildcard devs,
2407          * devices only for target mode, device instances
2408          * that have been invalidated but are waiting for
2409          * their last reference count to be released).
2410          */
2411         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2412                 return (1);
2413
2414         xpt_compile_path(&path,
2415                          NULL,
2416                          device->target->bus->path_id,
2417                          device->target->target_id,
2418                          device->lun_id);
2419         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2420         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2421         xpt_action((union ccb *)&cgd);
2422         csa->callback(csa->callback_arg,
2423                             AC_FOUND_DEVICE,
2424                             &path, &cgd);
2425         xpt_release_path(&path);
2426
2427         return(1);
2428 }
2429
2430 static int
2431 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2432 {
2433         struct cam_path path;
2434         struct ccb_pathinq cpi;
2435         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2436
2437         xpt_compile_path(&path, /*periph*/NULL,
2438                          bus->path_id,
2439                          CAM_TARGET_WILDCARD,
2440                          CAM_LUN_WILDCARD);
2441         xpt_path_lock(&path);
2442         xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2443         cpi.ccb_h.func_code = XPT_PATH_INQ;
2444         xpt_action((union ccb *)&cpi);
2445         csa->callback(csa->callback_arg,
2446                             AC_PATH_REGISTERED,
2447                             &path, &cpi);
2448         xpt_path_unlock(&path);
2449         xpt_release_path(&path);
2450
2451         return(1);
2452 }
2453
2454 void
2455 xpt_action(union ccb *start_ccb)
2456 {
2457
2458         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2459
2460         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2461         (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb);
2462 }
2463
2464 void
2465 xpt_action_default(union ccb *start_ccb)
2466 {
2467         struct cam_path *path;
2468         struct cam_sim *sim;
2469         int lock;
2470
2471         path = start_ccb->ccb_h.path;
2472         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n"));
2473
2474         switch (start_ccb->ccb_h.func_code) {
2475         case XPT_SCSI_IO:
2476         {
2477                 struct cam_ed *device;
2478
2479                 /*
2480                  * For the sake of compatibility with SCSI-1
2481                  * devices that may not understand the identify
2482                  * message, we include lun information in the
2483                  * second byte of all commands.  SCSI-1 specifies
2484                  * that luns are a 3 bit value and reserves only 3
2485                  * bits for lun information in the CDB.  Later
2486                  * revisions of the SCSI spec allow for more than 8
2487                  * luns, but have deprecated lun information in the
2488                  * CDB.  So, if the lun won't fit, we must omit.
2489                  *
2490                  * Also be aware that during initial probing for devices,
2491                  * the inquiry information is unknown but initialized to 0.
2492                  * This means that this code will be exercised while probing
2493                  * devices with an ANSI revision greater than 2.
2494                  */
2495                 device = path->device;
2496                 if (device->protocol_version <= SCSI_REV_2
2497                  && start_ccb->ccb_h.target_lun < 8
2498                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2499
2500                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2501                             start_ccb->ccb_h.target_lun << 5;
2502                 }
2503                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2504         }
2505         /* FALLTHROUGH */
2506         case XPT_TARGET_IO:
2507         case XPT_CONT_TARGET_IO:
2508                 start_ccb->csio.sense_resid = 0;
2509                 start_ccb->csio.resid = 0;
2510                 /* FALLTHROUGH */
2511         case XPT_ATA_IO:
2512                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2513                         start_ccb->ataio.resid = 0;
2514                 /* FALLTHROUGH */
2515         case XPT_RESET_DEV:
2516         case XPT_ENG_EXEC:
2517         case XPT_SMP_IO:
2518         {
2519                 struct cam_devq *devq;
2520
2521                 devq = path->bus->sim->devq;
2522                 mtx_lock(&devq->send_mtx);
2523                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2524                 if (xpt_schedule_devq(devq, path->device) != 0)
2525                         xpt_run_devq(devq);
2526                 mtx_unlock(&devq->send_mtx);
2527                 break;
2528         }
2529         case XPT_CALC_GEOMETRY:
2530                 /* Filter out garbage */
2531                 if (start_ccb->ccg.block_size == 0
2532                  || start_ccb->ccg.volume_size == 0) {
2533                         start_ccb->ccg.cylinders = 0;
2534                         start_ccb->ccg.heads = 0;
2535                         start_ccb->ccg.secs_per_track = 0;
2536                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2537                         break;
2538                 }
2539 #if defined(PC98) || defined(__sparc64__)
2540                 /*
2541                  * In a PC-98 system, geometry translation depens on
2542                  * the "real" device geometry obtained from mode page 4.
2543                  * SCSI geometry translation is performed in the
2544                  * initialization routine of the SCSI BIOS and the result
2545                  * stored in host memory.  If the translation is available
2546                  * in host memory, use it.  If not, rely on the default
2547                  * translation the device driver performs.
2548                  * For sparc64, we may need adjust the geometry of large
2549                  * disks in order to fit the limitations of the 16-bit
2550                  * fields of the VTOC8 disk label.
2551                  */
2552                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2553                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2554                         break;
2555                 }
2556 #endif
2557                 goto call_sim;
2558         case XPT_ABORT:
2559         {
2560                 union ccb* abort_ccb;
2561
2562                 abort_ccb = start_ccb->cab.abort_ccb;
2563                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2564
2565                         if (abort_ccb->ccb_h.pinfo.index >= 0) {
2566                                 struct cam_ccbq *ccbq;
2567                                 struct cam_ed *device;
2568
2569                                 device = abort_ccb->ccb_h.path->device;
2570                                 ccbq = &device->ccbq;
2571                                 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2572                                 abort_ccb->ccb_h.status =
2573                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2574                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2575                                 xpt_done(abort_ccb);
2576                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2577                                 break;
2578                         }
2579                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2580                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2581                                 /*
2582                                  * We've caught this ccb en route to
2583                                  * the SIM.  Flag it for abort and the
2584                                  * SIM will do so just before starting
2585                                  * real work on the CCB.
2586                                  */
2587                                 abort_ccb->ccb_h.status =
2588                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2589                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2590                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2591                                 break;
2592                         }
2593                 }
2594                 if (XPT_FC_IS_QUEUED(abort_ccb)
2595                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2596                         /*
2597                          * It's already completed but waiting
2598                          * for our SWI to get to it.
2599                          */
2600                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2601                         break;
2602                 }
2603                 /*
2604                  * If we weren't able to take care of the abort request
2605                  * in the XPT, pass the request down to the SIM for processing.
2606                  */
2607         }
2608         /* FALLTHROUGH */
2609         case XPT_ACCEPT_TARGET_IO:
2610         case XPT_EN_LUN:
2611         case XPT_IMMED_NOTIFY:
2612         case XPT_NOTIFY_ACK:
2613         case XPT_RESET_BUS:
2614         case XPT_IMMEDIATE_NOTIFY:
2615         case XPT_NOTIFY_ACKNOWLEDGE:
2616         case XPT_GET_SIM_KNOB:
2617         case XPT_SET_SIM_KNOB:
2618         case XPT_GET_TRAN_SETTINGS:
2619         case XPT_SET_TRAN_SETTINGS:
2620         case XPT_PATH_INQ:
2621 call_sim:
2622                 sim = path->bus->sim;
2623                 lock = (mtx_owned(sim->mtx) == 0);
2624                 if (lock)
2625                         CAM_SIM_LOCK(sim);
2626                 (*(sim->sim_action))(sim, start_ccb);
2627                 if (lock)
2628                         CAM_SIM_UNLOCK(sim);
2629                 break;
2630         case XPT_PATH_STATS:
2631                 start_ccb->cpis.last_reset = path->bus->last_reset;
2632                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2633                 break;
2634         case XPT_GDEV_TYPE:
2635         {
2636                 struct cam_ed *dev;
2637
2638                 dev = path->device;
2639                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2640                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2641                 } else {
2642                         struct ccb_getdev *cgd;
2643
2644                         cgd = &start_ccb->cgd;
2645                         cgd->protocol = dev->protocol;
2646                         cgd->inq_data = dev->inq_data;
2647                         cgd->ident_data = dev->ident_data;
2648                         cgd->inq_flags = dev->inq_flags;
2649                         cgd->ccb_h.status = CAM_REQ_CMP;
2650                         cgd->serial_num_len = dev->serial_num_len;
2651                         if ((dev->serial_num_len > 0)
2652                          && (dev->serial_num != NULL))
2653                                 bcopy(dev->serial_num, cgd->serial_num,
2654                                       dev->serial_num_len);
2655                 }
2656                 break;
2657         }
2658         case XPT_GDEV_STATS:
2659         {
2660                 struct cam_ed *dev;
2661
2662                 dev = path->device;
2663                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2664                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2665                 } else {
2666                         struct ccb_getdevstats *cgds;
2667                         struct cam_eb *bus;
2668                         struct cam_et *tar;
2669                         struct cam_devq *devq;
2670
2671                         cgds = &start_ccb->cgds;
2672                         bus = path->bus;
2673                         tar = path->target;
2674                         devq = bus->sim->devq;
2675                         mtx_lock(&devq->send_mtx);
2676                         cgds->dev_openings = dev->ccbq.dev_openings;
2677                         cgds->dev_active = dev->ccbq.dev_active;
2678                         cgds->allocated = dev->ccbq.allocated;
2679                         cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2680                         cgds->held = cgds->allocated - cgds->dev_active -
2681                             cgds->queued;
2682                         cgds->last_reset = tar->last_reset;
2683                         cgds->maxtags = dev->maxtags;
2684                         cgds->mintags = dev->mintags;
2685                         if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2686                                 cgds->last_reset = bus->last_reset;
2687                         mtx_unlock(&devq->send_mtx);
2688                         cgds->ccb_h.status = CAM_REQ_CMP;
2689                 }
2690                 break;
2691         }
2692         case XPT_GDEVLIST:
2693         {
2694                 struct cam_periph       *nperiph;
2695                 struct periph_list      *periph_head;
2696                 struct ccb_getdevlist   *cgdl;
2697                 u_int                   i;
2698                 struct cam_ed           *device;
2699                 int                     found;
2700
2701
2702                 found = 0;
2703
2704                 /*
2705                  * Don't want anyone mucking with our data.
2706                  */
2707                 device = path->device;
2708                 periph_head = &device->periphs;
2709                 cgdl = &start_ccb->cgdl;
2710
2711                 /*
2712                  * Check and see if the list has changed since the user
2713                  * last requested a list member.  If so, tell them that the
2714                  * list has changed, and therefore they need to start over
2715                  * from the beginning.
2716                  */
2717                 if ((cgdl->index != 0) &&
2718                     (cgdl->generation != device->generation)) {
2719                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2720                         break;
2721                 }
2722
2723                 /*
2724                  * Traverse the list of peripherals and attempt to find
2725                  * the requested peripheral.
2726                  */
2727                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2728                      (nperiph != NULL) && (i <= cgdl->index);
2729                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2730                         if (i == cgdl->index) {
2731                                 strncpy(cgdl->periph_name,
2732                                         nperiph->periph_name,
2733                                         DEV_IDLEN);
2734                                 cgdl->unit_number = nperiph->unit_number;
2735                                 found = 1;
2736                         }
2737                 }
2738                 if (found == 0) {
2739                         cgdl->status = CAM_GDEVLIST_ERROR;
2740                         break;
2741                 }
2742
2743                 if (nperiph == NULL)
2744                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2745                 else
2746                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2747
2748                 cgdl->index++;
2749                 cgdl->generation = device->generation;
2750
2751                 cgdl->ccb_h.status = CAM_REQ_CMP;
2752                 break;
2753         }
2754         case XPT_DEV_MATCH:
2755         {
2756                 dev_pos_type position_type;
2757                 struct ccb_dev_match *cdm;
2758
2759                 cdm = &start_ccb->cdm;
2760
2761                 /*
2762                  * There are two ways of getting at information in the EDT.
2763                  * The first way is via the primary EDT tree.  It starts
2764                  * with a list of busses, then a list of targets on a bus,
2765                  * then devices/luns on a target, and then peripherals on a
2766                  * device/lun.  The "other" way is by the peripheral driver
2767                  * lists.  The peripheral driver lists are organized by
2768                  * peripheral driver.  (obviously)  So it makes sense to
2769                  * use the peripheral driver list if the user is looking
2770                  * for something like "da1", or all "da" devices.  If the
2771                  * user is looking for something on a particular bus/target
2772                  * or lun, it's generally better to go through the EDT tree.
2773                  */
2774
2775                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2776                         position_type = cdm->pos.position_type;
2777                 else {
2778                         u_int i;
2779
2780                         position_type = CAM_DEV_POS_NONE;
2781
2782                         for (i = 0; i < cdm->num_patterns; i++) {
2783                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2784                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2785                                         position_type = CAM_DEV_POS_EDT;
2786                                         break;
2787                                 }
2788                         }
2789
2790                         if (cdm->num_patterns == 0)
2791                                 position_type = CAM_DEV_POS_EDT;
2792                         else if (position_type == CAM_DEV_POS_NONE)
2793                                 position_type = CAM_DEV_POS_PDRV;
2794                 }
2795
2796                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2797                 case CAM_DEV_POS_EDT:
2798                         xptedtmatch(cdm);
2799                         break;
2800                 case CAM_DEV_POS_PDRV:
2801                         xptperiphlistmatch(cdm);
2802                         break;
2803                 default:
2804                         cdm->status = CAM_DEV_MATCH_ERROR;
2805                         break;
2806                 }
2807
2808                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2809                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2810                 else
2811                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2812
2813                 break;
2814         }
2815         case XPT_SASYNC_CB:
2816         {
2817                 struct ccb_setasync *csa;
2818                 struct async_node *cur_entry;
2819                 struct async_list *async_head;
2820                 u_int32_t added;
2821
2822                 csa = &start_ccb->csa;
2823                 added = csa->event_enable;
2824                 async_head = &path->device->asyncs;
2825
2826                 /*
2827                  * If there is already an entry for us, simply
2828                  * update it.
2829                  */
2830                 cur_entry = SLIST_FIRST(async_head);
2831                 while (cur_entry != NULL) {
2832                         if ((cur_entry->callback_arg == csa->callback_arg)
2833                          && (cur_entry->callback == csa->callback))
2834                                 break;
2835                         cur_entry = SLIST_NEXT(cur_entry, links);
2836                 }
2837
2838                 if (cur_entry != NULL) {
2839                         /*
2840                          * If the request has no flags set,
2841                          * remove the entry.
2842                          */
2843                         added &= ~cur_entry->event_enable;
2844                         if (csa->event_enable == 0) {
2845                                 SLIST_REMOVE(async_head, cur_entry,
2846                                              async_node, links);
2847                                 xpt_release_device(path->device);
2848                                 free(cur_entry, M_CAMXPT);
2849                         } else {
2850                                 cur_entry->event_enable = csa->event_enable;
2851                         }
2852                         csa->event_enable = added;
2853                 } else {
2854                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2855                                            M_NOWAIT);
2856                         if (cur_entry == NULL) {
2857                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2858                                 break;
2859                         }
2860                         cur_entry->event_enable = csa->event_enable;
2861                         cur_entry->event_lock =
2862                             mtx_owned(path->bus->sim->mtx) ? 1 : 0;
2863                         cur_entry->callback_arg = csa->callback_arg;
2864                         cur_entry->callback = csa->callback;
2865                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
2866                         xpt_acquire_device(path->device);
2867                 }
2868                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2869                 break;
2870         }
2871         case XPT_REL_SIMQ:
2872         {
2873                 struct ccb_relsim *crs;
2874                 struct cam_ed *dev;
2875
2876                 crs = &start_ccb->crs;
2877                 dev = path->device;
2878                 if (dev == NULL) {
2879
2880                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
2881                         break;
2882                 }
2883
2884                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
2885
2886                         /* Don't ever go below one opening */
2887                         if (crs->openings > 0) {
2888                                 xpt_dev_ccbq_resize(path, crs->openings);
2889                                 if (bootverbose) {
2890                                         xpt_print(path,
2891                                             "number of openings is now %d\n",
2892                                             crs->openings);
2893                                 }
2894                         }
2895                 }
2896
2897                 mtx_lock(&dev->sim->devq->send_mtx);
2898                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
2899
2900                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
2901
2902                                 /*
2903                                  * Just extend the old timeout and decrement
2904                                  * the freeze count so that a single timeout
2905                                  * is sufficient for releasing the queue.
2906                                  */
2907                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2908                                 callout_stop(&dev->callout);
2909                         } else {
2910
2911                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2912                         }
2913
2914                         callout_reset_sbt(&dev->callout,
2915                             SBT_1MS * crs->release_timeout, 0,
2916                             xpt_release_devq_timeout, dev, 0);
2917
2918                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
2919
2920                 }
2921
2922                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
2923
2924                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
2925                                 /*
2926                                  * Decrement the freeze count so that a single
2927                                  * completion is still sufficient to unfreeze
2928                                  * the queue.
2929                                  */
2930                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2931                         } else {
2932
2933                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
2934                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2935                         }
2936                 }
2937
2938                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
2939
2940                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
2941                          || (dev->ccbq.dev_active == 0)) {
2942
2943                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2944                         } else {
2945
2946                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
2947                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2948                         }
2949                 }
2950                 mtx_unlock(&dev->sim->devq->send_mtx);
2951
2952                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
2953                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
2954                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
2955                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2956                 break;
2957         }
2958         case XPT_DEBUG: {
2959                 struct cam_path *oldpath;
2960
2961                 /* Check that all request bits are supported. */
2962                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
2963                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
2964                         break;
2965                 }
2966
2967                 cam_dflags = CAM_DEBUG_NONE;
2968                 if (cam_dpath != NULL) {
2969                         oldpath = cam_dpath;
2970                         cam_dpath = NULL;
2971                         xpt_free_path(oldpath);
2972                 }
2973                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
2974                         if (xpt_create_path(&cam_dpath, NULL,
2975                                             start_ccb->ccb_h.path_id,
2976                                             start_ccb->ccb_h.target_id,
2977                                             start_ccb->ccb_h.target_lun) !=
2978                                             CAM_REQ_CMP) {
2979                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
2980                         } else {
2981                                 cam_dflags = start_ccb->cdbg.flags;
2982                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2983                                 xpt_print(cam_dpath, "debugging flags now %x\n",
2984                                     cam_dflags);
2985                         }
2986                 } else
2987                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2988                 break;
2989         }
2990         case XPT_NOOP:
2991                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
2992                         xpt_freeze_devq(path, 1);
2993                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2994                 break;
2995         case XPT_REPROBE_LUN:
2996                 xpt_async(AC_INQ_CHANGED, path, NULL);
2997                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2998                 xpt_done(start_ccb);
2999                 break;
3000         default:
3001         case XPT_SDEV_TYPE:
3002         case XPT_TERM_IO:
3003         case XPT_ENG_INQ:
3004                 /* XXX Implement */
3005                 printf("%s: CCB type %#x not supported\n", __func__,
3006                        start_ccb->ccb_h.func_code);
3007                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3008                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3009                         xpt_done(start_ccb);
3010                 }
3011                 break;
3012         }
3013 }
3014
3015 void
3016 xpt_polled_action(union ccb *start_ccb)
3017 {
3018         u_int32_t timeout;
3019         struct    cam_sim *sim;
3020         struct    cam_devq *devq;
3021         struct    cam_ed *dev;
3022
3023         timeout = start_ccb->ccb_h.timeout * 10;
3024         sim = start_ccb->ccb_h.path->bus->sim;
3025         devq = sim->devq;
3026         dev = start_ccb->ccb_h.path->device;
3027
3028         mtx_unlock(&dev->device_mtx);
3029
3030         /*
3031          * Steal an opening so that no other queued requests
3032          * can get it before us while we simulate interrupts.
3033          */
3034         mtx_lock(&devq->send_mtx);
3035         dev->ccbq.dev_openings--;
3036         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3037             (--timeout > 0)) {
3038                 mtx_unlock(&devq->send_mtx);
3039                 DELAY(100);
3040                 CAM_SIM_LOCK(sim);
3041                 (*(sim->sim_poll))(sim);
3042                 CAM_SIM_UNLOCK(sim);
3043                 camisr_runqueue();
3044                 mtx_lock(&devq->send_mtx);
3045         }
3046         dev->ccbq.dev_openings++;
3047         mtx_unlock(&devq->send_mtx);
3048
3049         if (timeout != 0) {
3050                 xpt_action(start_ccb);
3051                 while(--timeout > 0) {
3052                         CAM_SIM_LOCK(sim);
3053                         (*(sim->sim_poll))(sim);
3054                         CAM_SIM_UNLOCK(sim);
3055                         camisr_runqueue();
3056                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3057                             != CAM_REQ_INPROG)
3058                                 break;
3059                         DELAY(100);
3060                 }
3061                 if (timeout == 0) {
3062                         /*
3063                          * XXX Is it worth adding a sim_timeout entry
3064                          * point so we can attempt recovery?  If
3065                          * this is only used for dumps, I don't think
3066                          * it is.
3067                          */
3068                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3069                 }
3070         } else {
3071                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3072         }
3073
3074         mtx_lock(&dev->device_mtx);
3075 }
3076
3077 /*
3078  * Schedule a peripheral driver to receive a ccb when its
3079  * target device has space for more transactions.
3080  */
3081 void
3082 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3083 {
3084
3085         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3086         cam_periph_assert(periph, MA_OWNED);
3087         if (new_priority < periph->scheduled_priority) {
3088                 periph->scheduled_priority = new_priority;
3089                 xpt_run_allocq(periph, 0);
3090         }
3091 }
3092
3093
3094 /*
3095  * Schedule a device to run on a given queue.
3096  * If the device was inserted as a new entry on the queue,
3097  * return 1 meaning the device queue should be run. If we
3098  * were already queued, implying someone else has already
3099  * started the queue, return 0 so the caller doesn't attempt
3100  * to run the queue.
3101  */
3102 static int
3103 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3104                  u_int32_t new_priority)
3105 {
3106         int retval;
3107         u_int32_t old_priority;
3108
3109         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3110
3111         old_priority = pinfo->priority;
3112
3113         /*
3114          * Are we already queued?
3115          */
3116         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3117                 /* Simply reorder based on new priority */
3118                 if (new_priority < old_priority) {
3119                         camq_change_priority(queue, pinfo->index,
3120                                              new_priority);
3121                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3122                                         ("changed priority to %d\n",
3123                                          new_priority));
3124                         retval = 1;
3125                 } else
3126                         retval = 0;
3127         } else {
3128                 /* New entry on the queue */
3129                 if (new_priority < old_priority)
3130                         pinfo->priority = new_priority;
3131
3132                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3133                                 ("Inserting onto queue\n"));
3134                 pinfo->generation = ++queue->generation;
3135                 camq_insert(queue, pinfo);
3136                 retval = 1;
3137         }
3138         return (retval);
3139 }
3140
3141 static void
3142 xpt_run_allocq_task(void *context, int pending)
3143 {
3144         struct cam_periph *periph = context;
3145
3146         cam_periph_lock(periph);
3147         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3148         xpt_run_allocq(periph, 1);
3149         cam_periph_unlock(periph);
3150         cam_periph_release(periph);
3151 }
3152
3153 static void
3154 xpt_run_allocq(struct cam_periph *periph, int sleep)
3155 {
3156         struct cam_ed   *device;
3157         union ccb       *ccb;
3158         uint32_t         prio;
3159
3160         cam_periph_assert(periph, MA_OWNED);
3161         if (periph->periph_allocating)
3162                 return;
3163         periph->periph_allocating = 1;
3164         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3165         device = periph->path->device;
3166         ccb = NULL;
3167 restart:
3168         while ((prio = min(periph->scheduled_priority,
3169             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3170             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3171              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3172
3173                 if (ccb == NULL &&
3174                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3175                         if (sleep) {
3176                                 ccb = xpt_get_ccb(periph);
3177                                 goto restart;
3178                         }
3179                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3180                                 break;
3181                         cam_periph_doacquire(periph);
3182                         periph->flags |= CAM_PERIPH_RUN_TASK;
3183                         taskqueue_enqueue(xsoftc.xpt_taskq,
3184                             &periph->periph_run_task);
3185                         break;
3186                 }
3187                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3188                 if (prio == periph->immediate_priority) {
3189                         periph->immediate_priority = CAM_PRIORITY_NONE;
3190                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3191                                         ("waking cam_periph_getccb()\n"));
3192                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3193                                           periph_links.sle);
3194                         wakeup(&periph->ccb_list);
3195                 } else {
3196                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3197                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3198                                         ("calling periph_start()\n"));
3199                         periph->periph_start(periph, ccb);
3200                 }
3201                 ccb = NULL;
3202         }
3203         if (ccb != NULL)
3204                 xpt_release_ccb(ccb);
3205         periph->periph_allocating = 0;
3206 }
3207
3208 static void
3209 xpt_run_devq(struct cam_devq *devq)
3210 {
3211         char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3212         int lock;
3213
3214         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3215
3216         devq->send_queue.qfrozen_cnt++;
3217         while ((devq->send_queue.entries > 0)
3218             && (devq->send_openings > 0)
3219             && (devq->send_queue.qfrozen_cnt <= 1)) {
3220                 struct  cam_ed *device;
3221                 union ccb *work_ccb;
3222                 struct  cam_sim *sim;
3223
3224                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3225                                                            CAMQ_HEAD);
3226                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3227                                 ("running device %p\n", device));
3228
3229                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3230                 if (work_ccb == NULL) {
3231                         printf("device on run queue with no ccbs???\n");
3232                         continue;
3233                 }
3234
3235                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3236
3237                         mtx_lock(&xsoftc.xpt_highpower_lock);
3238                         if (xsoftc.num_highpower <= 0) {
3239                                 /*
3240                                  * We got a high power command, but we
3241                                  * don't have any available slots.  Freeze
3242                                  * the device queue until we have a slot
3243                                  * available.
3244                                  */
3245                                 xpt_freeze_devq_device(device, 1);
3246                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3247                                                    highpowerq_entry);
3248
3249                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3250                                 continue;
3251                         } else {
3252                                 /*
3253                                  * Consume a high power slot while
3254                                  * this ccb runs.
3255                                  */
3256                                 xsoftc.num_highpower--;
3257                         }
3258                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3259                 }
3260                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3261                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3262                 devq->send_openings--;
3263                 devq->send_active++;
3264                 xpt_schedule_devq(devq, device);
3265                 mtx_unlock(&devq->send_mtx);
3266
3267                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3268                         /*
3269                          * The client wants to freeze the queue
3270                          * after this CCB is sent.
3271                          */
3272                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3273                 }
3274
3275                 /* In Target mode, the peripheral driver knows best... */
3276                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3277                         if ((device->inq_flags & SID_CmdQue) != 0
3278                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3279                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3280                         else
3281                                 /*
3282                                  * Clear this in case of a retried CCB that
3283                                  * failed due to a rejected tag.
3284                                  */
3285                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3286                 }
3287
3288                 switch (work_ccb->ccb_h.func_code) {
3289                 case XPT_SCSI_IO:
3290                         CAM_DEBUG(work_ccb->ccb_h.path,
3291                             CAM_DEBUG_CDB,("%s. CDB: %s\n",
3292                              scsi_op_desc(work_ccb->csio.cdb_io.cdb_bytes[0],
3293                                           &device->inq_data),
3294                              scsi_cdb_string(work_ccb->csio.cdb_io.cdb_bytes,
3295                                              cdb_str, sizeof(cdb_str))));
3296                         break;
3297                 case XPT_ATA_IO:
3298                         CAM_DEBUG(work_ccb->ccb_h.path,
3299                             CAM_DEBUG_CDB,("%s. ACB: %s\n",
3300                              ata_op_string(&work_ccb->ataio.cmd),
3301                              ata_cmd_string(&work_ccb->ataio.cmd,
3302                                             cdb_str, sizeof(cdb_str))));
3303                         break;
3304                 default:
3305                         break;
3306                 }
3307
3308                 /*
3309                  * Device queues can be shared among multiple SIM instances
3310                  * that reside on different busses.  Use the SIM from the
3311                  * queued device, rather than the one from the calling bus.
3312                  */
3313                 sim = device->sim;
3314                 lock = (mtx_owned(sim->mtx) == 0);
3315                 if (lock)
3316                         CAM_SIM_LOCK(sim);
3317                 (*(sim->sim_action))(sim, work_ccb);
3318                 if (lock)
3319                         CAM_SIM_UNLOCK(sim);
3320                 mtx_lock(&devq->send_mtx);
3321         }
3322         devq->send_queue.qfrozen_cnt--;
3323 }
3324
3325 /*
3326  * This function merges stuff from the slave ccb into the master ccb, while
3327  * keeping important fields in the master ccb constant.
3328  */
3329 void
3330 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3331 {
3332
3333         /*
3334          * Pull fields that are valid for peripheral drivers to set
3335          * into the master CCB along with the CCB "payload".
3336          */
3337         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3338         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3339         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3340         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3341         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3342               sizeof(union ccb) - sizeof(struct ccb_hdr));
3343 }
3344
3345 void
3346 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3347                     u_int32_t priority, u_int32_t flags)
3348 {
3349
3350         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3351         ccb_h->pinfo.priority = priority;
3352         ccb_h->path = path;
3353         ccb_h->path_id = path->bus->path_id;
3354         if (path->target)
3355                 ccb_h->target_id = path->target->target_id;
3356         else
3357                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3358         if (path->device) {
3359                 ccb_h->target_lun = path->device->lun_id;
3360                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3361         } else {
3362                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3363         }
3364         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3365         ccb_h->flags = flags;
3366         ccb_h->xflags = 0;
3367 }
3368
3369 void
3370 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3371 {
3372         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3373 }
3374
3375 /* Path manipulation functions */
3376 cam_status
3377 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3378                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3379 {
3380         struct     cam_path *path;
3381         cam_status status;
3382
3383         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3384
3385         if (path == NULL) {
3386                 status = CAM_RESRC_UNAVAIL;
3387                 return(status);
3388         }
3389         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3390         if (status != CAM_REQ_CMP) {
3391                 free(path, M_CAMPATH);
3392                 path = NULL;
3393         }
3394         *new_path_ptr = path;
3395         return (status);
3396 }
3397
3398 cam_status
3399 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3400                          struct cam_periph *periph, path_id_t path_id,
3401                          target_id_t target_id, lun_id_t lun_id)
3402 {
3403
3404         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3405             lun_id));
3406 }
3407
3408 cam_status
3409 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3410                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3411 {
3412         struct       cam_eb *bus;
3413         struct       cam_et *target;
3414         struct       cam_ed *device;
3415         cam_status   status;
3416
3417         status = CAM_REQ_CMP;   /* Completed without error */
3418         target = NULL;          /* Wildcarded */
3419         device = NULL;          /* Wildcarded */
3420
3421         /*
3422          * We will potentially modify the EDT, so block interrupts
3423          * that may attempt to create cam paths.
3424          */
3425         bus = xpt_find_bus(path_id);
3426         if (bus == NULL) {
3427                 status = CAM_PATH_INVALID;
3428         } else {
3429                 xpt_lock_buses();
3430                 mtx_lock(&bus->eb_mtx);
3431                 target = xpt_find_target(bus, target_id);
3432                 if (target == NULL) {
3433                         /* Create one */
3434                         struct cam_et *new_target;
3435
3436                         new_target = xpt_alloc_target(bus, target_id);
3437                         if (new_target == NULL) {
3438                                 status = CAM_RESRC_UNAVAIL;
3439                         } else {
3440                                 target = new_target;
3441                         }
3442                 }
3443                 xpt_unlock_buses();
3444                 if (target != NULL) {
3445                         device = xpt_find_device(target, lun_id);
3446                         if (device == NULL) {
3447                                 /* Create one */
3448                                 struct cam_ed *new_device;
3449
3450                                 new_device =
3451                                     (*(bus->xport->alloc_device))(bus,
3452                                                                       target,
3453                                                                       lun_id);
3454                                 if (new_device == NULL) {
3455                                         status = CAM_RESRC_UNAVAIL;
3456                                 } else {
3457                                         device = new_device;
3458                                 }
3459                         }
3460                 }
3461                 mtx_unlock(&bus->eb_mtx);
3462         }
3463
3464         /*
3465          * Only touch the user's data if we are successful.
3466          */
3467         if (status == CAM_REQ_CMP) {
3468                 new_path->periph = perph;
3469                 new_path->bus = bus;
3470                 new_path->target = target;
3471                 new_path->device = device;
3472                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3473         } else {
3474                 if (device != NULL)
3475                         xpt_release_device(device);
3476                 if (target != NULL)
3477                         xpt_release_target(target);
3478                 if (bus != NULL)
3479                         xpt_release_bus(bus);
3480         }
3481         return (status);
3482 }
3483
3484 cam_status
3485 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3486 {
3487         struct     cam_path *new_path;
3488
3489         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3490         if (new_path == NULL)
3491                 return(CAM_RESRC_UNAVAIL);
3492         xpt_copy_path(new_path, path);
3493         *new_path_ptr = new_path;
3494         return (CAM_REQ_CMP);
3495 }
3496
3497 void
3498 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3499 {
3500
3501         *new_path = *path;
3502         if (path->bus != NULL)
3503                 xpt_acquire_bus(path->bus);
3504         if (path->target != NULL)
3505                 xpt_acquire_target(path->target);
3506         if (path->device != NULL)
3507                 xpt_acquire_device(path->device);
3508 }
3509
3510 void
3511 xpt_release_path(struct cam_path *path)
3512 {
3513         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3514         if (path->device != NULL) {
3515                 xpt_release_device(path->device);
3516                 path->device = NULL;
3517         }
3518         if (path->target != NULL) {
3519                 xpt_release_target(path->target);
3520                 path->target = NULL;
3521         }
3522         if (path->bus != NULL) {
3523                 xpt_release_bus(path->bus);
3524                 path->bus = NULL;
3525         }
3526 }
3527
3528 void
3529 xpt_free_path(struct cam_path *path)
3530 {
3531
3532         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3533         xpt_release_path(path);
3534         free(path, M_CAMPATH);
3535 }
3536
3537 void
3538 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3539     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3540 {
3541
3542         xpt_lock_buses();
3543         if (bus_ref) {
3544                 if (path->bus)
3545                         *bus_ref = path->bus->refcount;
3546                 else
3547                         *bus_ref = 0;
3548         }
3549         if (periph_ref) {
3550                 if (path->periph)
3551                         *periph_ref = path->periph->refcount;
3552                 else
3553                         *periph_ref = 0;
3554         }
3555         xpt_unlock_buses();
3556         if (target_ref) {
3557                 if (path->target)
3558                         *target_ref = path->target->refcount;
3559                 else
3560                         *target_ref = 0;
3561         }
3562         if (device_ref) {
3563                 if (path->device)
3564                         *device_ref = path->device->refcount;
3565                 else
3566                         *device_ref = 0;
3567         }
3568 }
3569
3570 /*
3571  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3572  * in path1, 2 for match with wildcards in path2.
3573  */
3574 int
3575 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3576 {
3577         int retval = 0;
3578
3579         if (path1->bus != path2->bus) {
3580                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3581                         retval = 1;
3582                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3583                         retval = 2;
3584                 else
3585                         return (-1);
3586         }
3587         if (path1->target != path2->target) {
3588                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3589                         if (retval == 0)
3590                                 retval = 1;
3591                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3592                         retval = 2;
3593                 else
3594                         return (-1);
3595         }
3596         if (path1->device != path2->device) {
3597                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3598                         if (retval == 0)
3599                                 retval = 1;
3600                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3601                         retval = 2;
3602                 else
3603                         return (-1);
3604         }
3605         return (retval);
3606 }
3607
3608 int
3609 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3610 {
3611         int retval = 0;
3612
3613         if (path->bus != dev->target->bus) {
3614                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3615                         retval = 1;
3616                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3617                         retval = 2;
3618                 else
3619                         return (-1);
3620         }
3621         if (path->target != dev->target) {
3622                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3623                         if (retval == 0)
3624                                 retval = 1;
3625                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3626                         retval = 2;
3627                 else
3628                         return (-1);
3629         }
3630         if (path->device != dev) {
3631                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3632                         if (retval == 0)
3633                                 retval = 1;
3634                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3635                         retval = 2;
3636                 else
3637                         return (-1);
3638         }
3639         return (retval);
3640 }
3641
3642 void
3643 xpt_print_path(struct cam_path *path)
3644 {
3645
3646         if (path == NULL)
3647                 printf("(nopath): ");
3648         else {
3649                 if (path->periph != NULL)
3650                         printf("(%s%d:", path->periph->periph_name,
3651                                path->periph->unit_number);
3652                 else
3653                         printf("(noperiph:");
3654
3655                 if (path->bus != NULL)
3656                         printf("%s%d:%d:", path->bus->sim->sim_name,
3657                                path->bus->sim->unit_number,
3658                                path->bus->sim->bus_id);
3659                 else
3660                         printf("nobus:");
3661
3662                 if (path->target != NULL)
3663                         printf("%d:", path->target->target_id);
3664                 else
3665                         printf("X:");
3666
3667                 if (path->device != NULL)
3668                         printf("%jx): ", (uintmax_t)path->device->lun_id);
3669                 else
3670                         printf("X): ");
3671         }
3672 }
3673
3674 void
3675 xpt_print_device(struct cam_ed *device)
3676 {
3677
3678         if (device == NULL)
3679                 printf("(nopath): ");
3680         else {
3681                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3682                        device->sim->unit_number,
3683                        device->sim->bus_id,
3684                        device->target->target_id,
3685                        (uintmax_t)device->lun_id);
3686         }
3687 }
3688
3689 void
3690 xpt_print(struct cam_path *path, const char *fmt, ...)
3691 {
3692         va_list ap;
3693         xpt_print_path(path);
3694         va_start(ap, fmt);
3695         vprintf(fmt, ap);
3696         va_end(ap);
3697 }
3698
3699 int
3700 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3701 {
3702         struct sbuf sb;
3703
3704         sbuf_new(&sb, str, str_len, 0);
3705
3706         if (path == NULL)
3707                 sbuf_printf(&sb, "(nopath): ");
3708         else {
3709                 if (path->periph != NULL)
3710                         sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
3711                                     path->periph->unit_number);
3712                 else
3713                         sbuf_printf(&sb, "(noperiph:");
3714
3715                 if (path->bus != NULL)
3716                         sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
3717                                     path->bus->sim->unit_number,
3718                                     path->bus->sim->bus_id);
3719                 else
3720                         sbuf_printf(&sb, "nobus:");
3721
3722                 if (path->target != NULL)
3723                         sbuf_printf(&sb, "%d:", path->target->target_id);
3724                 else
3725                         sbuf_printf(&sb, "X:");
3726
3727                 if (path->device != NULL)
3728                         sbuf_printf(&sb, "%jx): ",
3729                             (uintmax_t)path->device->lun_id);
3730                 else
3731                         sbuf_printf(&sb, "X): ");
3732         }
3733         sbuf_finish(&sb);
3734
3735         return(sbuf_len(&sb));
3736 }
3737
3738 path_id_t
3739 xpt_path_path_id(struct cam_path *path)
3740 {
3741         return(path->bus->path_id);
3742 }
3743
3744 target_id_t
3745 xpt_path_target_id(struct cam_path *path)
3746 {
3747         if (path->target != NULL)
3748                 return (path->target->target_id);
3749         else
3750                 return (CAM_TARGET_WILDCARD);
3751 }
3752
3753 lun_id_t
3754 xpt_path_lun_id(struct cam_path *path)
3755 {
3756         if (path->device != NULL)
3757                 return (path->device->lun_id);
3758         else
3759                 return (CAM_LUN_WILDCARD);
3760 }
3761
3762 struct cam_sim *
3763 xpt_path_sim(struct cam_path *path)
3764 {
3765
3766         return (path->bus->sim);
3767 }
3768
3769 struct cam_periph*
3770 xpt_path_periph(struct cam_path *path)
3771 {
3772
3773         return (path->periph);
3774 }
3775
3776 int
3777 xpt_path_legacy_ata_id(struct cam_path *path)
3778 {
3779         struct cam_eb *bus;
3780         int bus_id;
3781
3782         if ((strcmp(path->bus->sim->sim_name, "ata") != 0) &&
3783             strcmp(path->bus->sim->sim_name, "ahcich") != 0 &&
3784             strcmp(path->bus->sim->sim_name, "mvsch") != 0 &&
3785             strcmp(path->bus->sim->sim_name, "siisch") != 0)
3786                 return (-1);
3787
3788         if (strcmp(path->bus->sim->sim_name, "ata") == 0 &&
3789             path->bus->sim->unit_number < 2) {
3790                 bus_id = path->bus->sim->unit_number;
3791         } else {
3792                 bus_id = 2;
3793                 xpt_lock_buses();
3794                 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) {
3795                         if (bus == path->bus)
3796                                 break;
3797                         if ((strcmp(bus->sim->sim_name, "ata") == 0 &&
3798                              bus->sim->unit_number >= 2) ||
3799                             strcmp(bus->sim->sim_name, "ahcich") == 0 ||
3800                             strcmp(bus->sim->sim_name, "mvsch") == 0 ||
3801                             strcmp(bus->sim->sim_name, "siisch") == 0)
3802                                 bus_id++;
3803                 }
3804                 xpt_unlock_buses();
3805         }
3806         if (path->target != NULL) {
3807                 if (path->target->target_id < 2)
3808                         return (bus_id * 2 + path->target->target_id);
3809                 else
3810                         return (-1);
3811         } else
3812                 return (bus_id * 2);
3813 }
3814
3815 /*
3816  * Release a CAM control block for the caller.  Remit the cost of the structure
3817  * to the device referenced by the path.  If the this device had no 'credits'
3818  * and peripheral drivers have registered async callbacks for this notification
3819  * call them now.
3820  */
3821 void
3822 xpt_release_ccb(union ccb *free_ccb)
3823 {
3824         struct   cam_ed *device;
3825         struct   cam_periph *periph;
3826
3827         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3828         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3829         device = free_ccb->ccb_h.path->device;
3830         periph = free_ccb->ccb_h.path->periph;
3831
3832         xpt_free_ccb(free_ccb);
3833         periph->periph_allocated--;
3834         cam_ccbq_release_opening(&device->ccbq);
3835         xpt_run_allocq(periph, 0);
3836 }
3837
3838 /* Functions accessed by SIM drivers */
3839
3840 static struct xpt_xport xport_default = {
3841         .alloc_device = xpt_alloc_device_default,
3842         .action = xpt_action_default,
3843         .async = xpt_dev_async_default,
3844 };
3845
3846 /*
3847  * A sim structure, listing the SIM entry points and instance
3848  * identification info is passed to xpt_bus_register to hook the SIM
3849  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
3850  * for this new bus and places it in the array of busses and assigns
3851  * it a path_id.  The path_id may be influenced by "hard wiring"
3852  * information specified by the user.  Once interrupt services are
3853  * available, the bus will be probed.
3854  */
3855 int32_t
3856 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
3857 {
3858         struct cam_eb *new_bus;
3859         struct cam_eb *old_bus;
3860         struct ccb_pathinq cpi;
3861         struct cam_path *path;
3862         cam_status status;
3863
3864         mtx_assert(sim->mtx, MA_OWNED);
3865
3866         sim->bus_id = bus;
3867         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3868                                           M_CAMXPT, M_NOWAIT|M_ZERO);
3869         if (new_bus == NULL) {
3870                 /* Couldn't satisfy request */
3871                 return (CAM_RESRC_UNAVAIL);
3872         }
3873
3874         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
3875         TAILQ_INIT(&new_bus->et_entries);
3876         cam_sim_hold(sim);
3877         new_bus->sim = sim;
3878         timevalclear(&new_bus->last_reset);
3879         new_bus->flags = 0;
3880         new_bus->refcount = 1;  /* Held until a bus_deregister event */
3881         new_bus->generation = 0;
3882
3883         xpt_lock_buses();
3884         sim->path_id = new_bus->path_id =
3885             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3886         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3887         while (old_bus != NULL
3888             && old_bus->path_id < new_bus->path_id)
3889                 old_bus = TAILQ_NEXT(old_bus, links);
3890         if (old_bus != NULL)
3891                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3892         else
3893                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
3894         xsoftc.bus_generation++;
3895         xpt_unlock_buses();
3896
3897         /*
3898          * Set a default transport so that a PATH_INQ can be issued to
3899          * the SIM.  This will then allow for probing and attaching of
3900          * a more appropriate transport.
3901          */
3902         new_bus->xport = &xport_default;
3903
3904         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
3905                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3906         if (status != CAM_REQ_CMP) {
3907                 xpt_release_bus(new_bus);
3908                 free(path, M_CAMXPT);
3909                 return (CAM_RESRC_UNAVAIL);
3910         }
3911
3912         xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3913         cpi.ccb_h.func_code = XPT_PATH_INQ;
3914         xpt_action((union ccb *)&cpi);
3915
3916         if (cpi.ccb_h.status == CAM_REQ_CMP) {
3917                 switch (cpi.transport) {
3918                 case XPORT_SPI:
3919                 case XPORT_SAS:
3920                 case XPORT_FC:
3921                 case XPORT_USB:
3922                 case XPORT_ISCSI:
3923                 case XPORT_SRP:
3924                 case XPORT_PPB:
3925                         new_bus->xport = scsi_get_xport();
3926                         break;
3927                 case XPORT_ATA:
3928                 case XPORT_SATA:
3929                         new_bus->xport = ata_get_xport();
3930                         break;
3931                 default:
3932                         new_bus->xport = &xport_default;
3933                         break;
3934                 }
3935         }
3936
3937         /* Notify interested parties */
3938         if (sim->path_id != CAM_XPT_PATH_ID) {
3939
3940                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
3941                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
3942                         union   ccb *scan_ccb;
3943
3944                         /* Initiate bus rescan. */
3945                         scan_ccb = xpt_alloc_ccb_nowait();
3946                         if (scan_ccb != NULL) {
3947                                 scan_ccb->ccb_h.path = path;
3948                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
3949                                 scan_ccb->crcn.flags = 0;
3950                                 xpt_rescan(scan_ccb);
3951                         } else {
3952                                 xpt_print(path,
3953                                           "Can't allocate CCB to scan bus\n");
3954                                 xpt_free_path(path);
3955                         }
3956                 } else
3957                         xpt_free_path(path);
3958         } else
3959                 xpt_free_path(path);
3960         return (CAM_SUCCESS);
3961 }
3962
3963 int32_t
3964 xpt_bus_deregister(path_id_t pathid)
3965 {
3966         struct cam_path bus_path;
3967         cam_status status;
3968
3969         status = xpt_compile_path(&bus_path, NULL, pathid,
3970                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3971         if (status != CAM_REQ_CMP)
3972                 return (status);
3973
3974         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
3975         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
3976
3977         /* Release the reference count held while registered. */
3978         xpt_release_bus(bus_path.bus);
3979         xpt_release_path(&bus_path);
3980
3981         return (CAM_REQ_CMP);
3982 }
3983
3984 static path_id_t
3985 xptnextfreepathid(void)
3986 {
3987         struct cam_eb *bus;
3988         path_id_t pathid;
3989         const char *strval;
3990
3991         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
3992         pathid = 0;
3993         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3994 retry:
3995         /* Find an unoccupied pathid */
3996         while (bus != NULL && bus->path_id <= pathid) {
3997                 if (bus->path_id == pathid)
3998                         pathid++;
3999                 bus = TAILQ_NEXT(bus, links);
4000         }
4001
4002         /*
4003          * Ensure that this pathid is not reserved for
4004          * a bus that may be registered in the future.
4005          */
4006         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4007                 ++pathid;
4008                 /* Start the search over */
4009                 goto retry;
4010         }
4011         return (pathid);
4012 }
4013
4014 static path_id_t
4015 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4016 {
4017         path_id_t pathid;
4018         int i, dunit, val;
4019         char buf[32];
4020         const char *dname;
4021
4022         pathid = CAM_XPT_PATH_ID;
4023         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4024         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4025                 return (pathid);
4026         i = 0;
4027         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4028                 if (strcmp(dname, "scbus")) {
4029                         /* Avoid a bit of foot shooting. */
4030                         continue;
4031                 }
4032                 if (dunit < 0)          /* unwired?! */
4033                         continue;
4034                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4035                         if (sim_bus == val) {
4036                                 pathid = dunit;
4037                                 break;
4038                         }
4039                 } else if (sim_bus == 0) {
4040                         /* Unspecified matches bus 0 */
4041                         pathid = dunit;
4042                         break;
4043                 } else {
4044                         printf("Ambiguous scbus configuration for %s%d "
4045                                "bus %d, cannot wire down.  The kernel "
4046                                "config entry for scbus%d should "
4047                                "specify a controller bus.\n"
4048                                "Scbus will be assigned dynamically.\n",
4049                                sim_name, sim_unit, sim_bus, dunit);
4050                         break;
4051                 }
4052         }
4053
4054         if (pathid == CAM_XPT_PATH_ID)
4055                 pathid = xptnextfreepathid();
4056         return (pathid);
4057 }
4058
4059 static const char *
4060 xpt_async_string(u_int32_t async_code)
4061 {
4062
4063         switch (async_code) {
4064         case AC_BUS_RESET: return ("AC_BUS_RESET");
4065         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4066         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4067         case AC_SENT_BDR: return ("AC_SENT_BDR");
4068         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4069         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4070         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4071         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4072         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4073         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4074         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4075         case AC_CONTRACT: return ("AC_CONTRACT");
4076         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4077         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4078         }
4079         return ("AC_UNKNOWN");
4080 }
4081
4082 static int
4083 xpt_async_size(u_int32_t async_code)
4084 {
4085
4086         switch (async_code) {
4087         case AC_BUS_RESET: return (0);
4088         case AC_UNSOL_RESEL: return (0);
4089         case AC_SCSI_AEN: return (0);
4090         case AC_SENT_BDR: return (0);
4091         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4092         case AC_PATH_DEREGISTERED: return (0);
4093         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4094         case AC_LOST_DEVICE: return (0);
4095         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4096         case AC_INQ_CHANGED: return (0);
4097         case AC_GETDEV_CHANGED: return (0);
4098         case AC_CONTRACT: return (sizeof(struct ac_contract));
4099         case AC_ADVINFO_CHANGED: return (-1);
4100         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4101         }
4102         return (0);
4103 }
4104
4105 static int
4106 xpt_async_process_dev(struct cam_ed *device, void *arg)
4107 {
4108         union ccb *ccb = arg;
4109         struct cam_path *path = ccb->ccb_h.path;
4110         void *async_arg = ccb->casync.async_arg_ptr;
4111         u_int32_t async_code = ccb->casync.async_code;
4112         int relock;
4113
4114         if (path->device != device
4115          && path->device->lun_id != CAM_LUN_WILDCARD
4116          && device->lun_id != CAM_LUN_WILDCARD)
4117                 return (1);
4118
4119         /*
4120          * The async callback could free the device.
4121          * If it is a broadcast async, it doesn't hold
4122          * device reference, so take our own reference.
4123          */
4124         xpt_acquire_device(device);
4125
4126         /*
4127          * If async for specific device is to be delivered to
4128          * the wildcard client, take the specific device lock.
4129          * XXX: We may need a way for client to specify it.
4130          */
4131         if ((device->lun_id == CAM_LUN_WILDCARD &&
4132              path->device->lun_id != CAM_LUN_WILDCARD) ||
4133             (device->target->target_id == CAM_TARGET_WILDCARD &&
4134              path->target->target_id != CAM_TARGET_WILDCARD) ||
4135             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4136              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4137                 mtx_unlock(&device->device_mtx);
4138                 xpt_path_lock(path);
4139                 relock = 1;
4140         } else
4141                 relock = 0;
4142
4143         (*(device->target->bus->xport->async))(async_code,
4144             device->target->bus, device->target, device, async_arg);
4145         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4146
4147         if (relock) {
4148                 xpt_path_unlock(path);
4149                 mtx_lock(&device->device_mtx);
4150         }
4151         xpt_release_device(device);
4152         return (1);
4153 }
4154
4155 static int
4156 xpt_async_process_tgt(struct cam_et *target, void *arg)
4157 {
4158         union ccb *ccb = arg;
4159         struct cam_path *path = ccb->ccb_h.path;
4160
4161         if (path->target != target
4162          && path->target->target_id != CAM_TARGET_WILDCARD
4163          && target->target_id != CAM_TARGET_WILDCARD)
4164                 return (1);
4165
4166         if (ccb->casync.async_code == AC_SENT_BDR) {
4167                 /* Update our notion of when the last reset occurred */
4168                 microtime(&target->last_reset);
4169         }
4170
4171         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4172 }
4173
4174 static void
4175 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4176 {
4177         struct cam_eb *bus;
4178         struct cam_path *path;
4179         void *async_arg;
4180         u_int32_t async_code;
4181
4182         path = ccb->ccb_h.path;
4183         async_code = ccb->casync.async_code;
4184         async_arg = ccb->casync.async_arg_ptr;
4185         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4186             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4187         bus = path->bus;
4188
4189         if (async_code == AC_BUS_RESET) {
4190                 /* Update our notion of when the last reset occurred */
4191                 microtime(&bus->last_reset);
4192         }
4193
4194         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4195
4196         /*
4197          * If this wasn't a fully wildcarded async, tell all
4198          * clients that want all async events.
4199          */
4200         if (bus != xpt_periph->path->bus) {
4201                 xpt_path_lock(xpt_periph->path);
4202                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4203                 xpt_path_unlock(xpt_periph->path);
4204         }
4205
4206         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4207                 xpt_release_devq(path, 1, TRUE);
4208         else
4209                 xpt_release_simq(path->bus->sim, TRUE);
4210         if (ccb->casync.async_arg_size > 0)
4211                 free(async_arg, M_CAMXPT);
4212         xpt_free_path(path);
4213         xpt_free_ccb(ccb);
4214 }
4215
4216 static void
4217 xpt_async_bcast(struct async_list *async_head,
4218                 u_int32_t async_code,
4219                 struct cam_path *path, void *async_arg)
4220 {
4221         struct async_node *cur_entry;
4222         int lock;
4223
4224         cur_entry = SLIST_FIRST(async_head);
4225         while (cur_entry != NULL) {
4226                 struct async_node *next_entry;
4227                 /*
4228                  * Grab the next list entry before we call the current
4229                  * entry's callback.  This is because the callback function
4230                  * can delete its async callback entry.
4231                  */
4232                 next_entry = SLIST_NEXT(cur_entry, links);
4233                 if ((cur_entry->event_enable & async_code) != 0) {
4234                         lock = cur_entry->event_lock;
4235                         if (lock)
4236                                 CAM_SIM_LOCK(path->device->sim);
4237                         cur_entry->callback(cur_entry->callback_arg,
4238                                             async_code, path,
4239                                             async_arg);
4240                         if (lock)
4241                                 CAM_SIM_UNLOCK(path->device->sim);
4242                 }
4243                 cur_entry = next_entry;
4244         }
4245 }
4246
4247 void
4248 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4249 {
4250         union ccb *ccb;
4251         int size;
4252
4253         ccb = xpt_alloc_ccb_nowait();
4254         if (ccb == NULL) {
4255                 xpt_print(path, "Can't allocate CCB to send %s\n",
4256                     xpt_async_string(async_code));
4257                 return;
4258         }
4259
4260         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4261                 xpt_print(path, "Can't allocate path to send %s\n",
4262                     xpt_async_string(async_code));
4263                 xpt_free_ccb(ccb);
4264                 return;
4265         }
4266         ccb->ccb_h.path->periph = NULL;
4267         ccb->ccb_h.func_code = XPT_ASYNC;
4268         ccb->ccb_h.cbfcnp = xpt_async_process;
4269         ccb->ccb_h.flags |= CAM_UNLOCKED;
4270         ccb->casync.async_code = async_code;
4271         ccb->casync.async_arg_size = 0;
4272         size = xpt_async_size(async_code);
4273         if (size > 0 && async_arg != NULL) {
4274                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4275                 if (ccb->casync.async_arg_ptr == NULL) {
4276                         xpt_print(path, "Can't allocate argument to send %s\n",
4277                             xpt_async_string(async_code));
4278                         xpt_free_path(ccb->ccb_h.path);
4279                         xpt_free_ccb(ccb);
4280                         return;
4281                 }
4282                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4283                 ccb->casync.async_arg_size = size;
4284         } else if (size < 0) {
4285                 ccb->casync.async_arg_ptr = async_arg;
4286                 ccb->casync.async_arg_size = size;
4287         }
4288         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4289                 xpt_freeze_devq(path, 1);
4290         else
4291                 xpt_freeze_simq(path->bus->sim, 1);
4292         xpt_done(ccb);
4293 }
4294
4295 static void
4296 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4297                       struct cam_et *target, struct cam_ed *device,
4298                       void *async_arg)
4299 {
4300
4301         /*
4302          * We only need to handle events for real devices.
4303          */
4304         if (target->target_id == CAM_TARGET_WILDCARD
4305          || device->lun_id == CAM_LUN_WILDCARD)
4306                 return;
4307
4308         printf("%s called\n", __func__);
4309 }
4310
4311 static uint32_t
4312 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4313 {
4314         struct cam_devq *devq;
4315         uint32_t freeze;
4316
4317         devq = dev->sim->devq;
4318         mtx_assert(&devq->send_mtx, MA_OWNED);
4319         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4320             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4321             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4322         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4323         /* Remove frozen device from sendq. */
4324         if (device_is_queued(dev))
4325                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4326         return (freeze);
4327 }
4328
4329 u_int32_t
4330 xpt_freeze_devq(struct cam_path *path, u_int count)
4331 {
4332         struct cam_ed   *dev = path->device;
4333         struct cam_devq *devq;
4334         uint32_t         freeze;
4335
4336         devq = dev->sim->devq;
4337         mtx_lock(&devq->send_mtx);
4338         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4339         freeze = xpt_freeze_devq_device(dev, count);
4340         mtx_unlock(&devq->send_mtx);
4341         return (freeze);
4342 }
4343
4344 u_int32_t
4345 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4346 {
4347         struct cam_devq *devq;
4348         uint32_t         freeze;
4349
4350         devq = sim->devq;
4351         mtx_lock(&devq->send_mtx);
4352         freeze = (devq->send_queue.qfrozen_cnt += count);
4353         mtx_unlock(&devq->send_mtx);
4354         return (freeze);
4355 }
4356
4357 static void
4358 xpt_release_devq_timeout(void *arg)
4359 {
4360         struct cam_ed *dev;
4361         struct cam_devq *devq;
4362
4363         dev = (struct cam_ed *)arg;
4364         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4365         devq = dev->sim->devq;
4366         mtx_assert(&devq->send_mtx, MA_OWNED);
4367         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4368                 xpt_run_devq(devq);
4369 }
4370
4371 void
4372 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4373 {
4374         struct cam_ed *dev;
4375         struct cam_devq *devq;
4376
4377         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4378             count, run_queue));
4379         dev = path->device;
4380         devq = dev->sim->devq;
4381         mtx_lock(&devq->send_mtx);
4382         if (xpt_release_devq_device(dev, count, run_queue))
4383                 xpt_run_devq(dev->sim->devq);
4384         mtx_unlock(&devq->send_mtx);
4385 }
4386
4387 static int
4388 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4389 {
4390
4391         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4392         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4393             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4394             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4395         if (count > dev->ccbq.queue.qfrozen_cnt) {
4396 #ifdef INVARIANTS
4397                 printf("xpt_release_devq(): requested %u > present %u\n",
4398                     count, dev->ccbq.queue.qfrozen_cnt);
4399 #endif
4400                 count = dev->ccbq.queue.qfrozen_cnt;
4401         }
4402         dev->ccbq.queue.qfrozen_cnt -= count;
4403         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4404                 /*
4405                  * No longer need to wait for a successful
4406                  * command completion.
4407                  */
4408                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4409                 /*
4410                  * Remove any timeouts that might be scheduled
4411                  * to release this queue.
4412                  */
4413                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4414                         callout_stop(&dev->callout);
4415                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4416                 }
4417                 /*
4418                  * Now that we are unfrozen schedule the
4419                  * device so any pending transactions are
4420                  * run.
4421                  */
4422                 xpt_schedule_devq(dev->sim->devq, dev);
4423         } else
4424                 run_queue = 0;
4425         return (run_queue);
4426 }
4427
4428 void
4429 xpt_release_simq(struct cam_sim *sim, int run_queue)
4430 {
4431         struct cam_devq *devq;
4432
4433         devq = sim->devq;
4434         mtx_lock(&devq->send_mtx);
4435         if (devq->send_queue.qfrozen_cnt <= 0) {
4436 #ifdef INVARIANTS
4437                 printf("xpt_release_simq: requested 1 > present %u\n",
4438                     devq->send_queue.qfrozen_cnt);
4439 #endif
4440         } else
4441                 devq->send_queue.qfrozen_cnt--;
4442         if (devq->send_queue.qfrozen_cnt == 0) {
4443                 /*
4444                  * If there is a timeout scheduled to release this
4445                  * sim queue, remove it.  The queue frozen count is
4446                  * already at 0.
4447                  */
4448                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4449                         callout_stop(&sim->callout);
4450                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4451                 }
4452                 if (run_queue) {
4453                         /*
4454                          * Now that we are unfrozen run the send queue.
4455                          */
4456                         xpt_run_devq(sim->devq);
4457                 }
4458         }
4459         mtx_unlock(&devq->send_mtx);
4460 }
4461
4462 /*
4463  * XXX Appears to be unused.
4464  */
4465 static void
4466 xpt_release_simq_timeout(void *arg)
4467 {
4468         struct cam_sim *sim;
4469
4470         sim = (struct cam_sim *)arg;
4471         xpt_release_simq(sim, /* run_queue */ TRUE);
4472 }
4473
4474 void
4475 xpt_done(union ccb *done_ccb)
4476 {
4477         struct cam_doneq *queue;
4478         int     run, hash;
4479
4480         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4481         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4482                 return;
4483
4484         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4485             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4486         queue = &cam_doneqs[hash];
4487         mtx_lock(&queue->cam_doneq_mtx);
4488         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4489         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4490         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4491         mtx_unlock(&queue->cam_doneq_mtx);
4492         if (run)
4493                 wakeup(&queue->cam_doneq);
4494 }
4495
4496 void
4497 xpt_done_direct(union ccb *done_ccb)
4498 {
4499
4500         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done_direct\n"));
4501         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4502                 return;
4503
4504         xpt_done_process(&done_ccb->ccb_h);
4505 }
4506
4507 union ccb *
4508 xpt_alloc_ccb()
4509 {
4510         union ccb *new_ccb;
4511
4512         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4513         return (new_ccb);
4514 }
4515
4516 union ccb *
4517 xpt_alloc_ccb_nowait()
4518 {
4519         union ccb *new_ccb;
4520
4521         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4522         return (new_ccb);
4523 }
4524
4525 void
4526 xpt_free_ccb(union ccb *free_ccb)
4527 {
4528         free(free_ccb, M_CAMCCB);
4529 }
4530
4531
4532
4533 /* Private XPT functions */
4534
4535 /*
4536  * Get a CAM control block for the caller. Charge the structure to the device
4537  * referenced by the path.  If we don't have sufficient resources to allocate
4538  * more ccbs, we return NULL.
4539  */
4540 static union ccb *
4541 xpt_get_ccb_nowait(struct cam_periph *periph)
4542 {
4543         union ccb *new_ccb;
4544
4545         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4546         if (new_ccb == NULL)
4547                 return (NULL);
4548         periph->periph_allocated++;
4549         cam_ccbq_take_opening(&periph->path->device->ccbq);
4550         return (new_ccb);
4551 }
4552
4553 static union ccb *
4554 xpt_get_ccb(struct cam_periph *periph)
4555 {
4556         union ccb *new_ccb;
4557
4558         cam_periph_unlock(periph);
4559         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4560         cam_periph_lock(periph);
4561         periph->periph_allocated++;
4562         cam_ccbq_take_opening(&periph->path->device->ccbq);
4563         return (new_ccb);
4564 }
4565
4566 union ccb *
4567 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4568 {
4569         struct ccb_hdr *ccb_h;
4570
4571         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4572         cam_periph_assert(periph, MA_OWNED);
4573         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4574             ccb_h->pinfo.priority != priority) {
4575                 if (priority < periph->immediate_priority) {
4576                         periph->immediate_priority = priority;
4577                         xpt_run_allocq(periph, 0);
4578                 } else
4579                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4580                             "cgticb", 0);
4581         }
4582         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4583         return ((union ccb *)ccb_h);
4584 }
4585
4586 static void
4587 xpt_acquire_bus(struct cam_eb *bus)
4588 {
4589
4590         xpt_lock_buses();
4591         bus->refcount++;
4592         xpt_unlock_buses();
4593 }
4594
4595 static void
4596 xpt_release_bus(struct cam_eb *bus)
4597 {
4598
4599         xpt_lock_buses();
4600         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4601         if (--bus->refcount > 0) {
4602                 xpt_unlock_buses();
4603                 return;
4604         }
4605         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4606         xsoftc.bus_generation++;
4607         xpt_unlock_buses();
4608         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4609             ("destroying bus, but target list is not empty"));
4610         cam_sim_release(bus->sim);
4611         mtx_destroy(&bus->eb_mtx);
4612         free(bus, M_CAMXPT);
4613 }
4614
4615 static struct cam_et *
4616 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4617 {
4618         struct cam_et *cur_target, *target;
4619
4620         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4621         mtx_assert(&bus->eb_mtx, MA_OWNED);
4622         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4623                                          M_NOWAIT|M_ZERO);
4624         if (target == NULL)
4625                 return (NULL);
4626
4627         TAILQ_INIT(&target->ed_entries);
4628         target->bus = bus;
4629         target->target_id = target_id;
4630         target->refcount = 1;
4631         target->generation = 0;
4632         target->luns = NULL;
4633         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4634         timevalclear(&target->last_reset);
4635         /*
4636          * Hold a reference to our parent bus so it
4637          * will not go away before we do.
4638          */
4639         bus->refcount++;
4640
4641         /* Insertion sort into our bus's target list */
4642         cur_target = TAILQ_FIRST(&bus->et_entries);
4643         while (cur_target != NULL && cur_target->target_id < target_id)
4644                 cur_target = TAILQ_NEXT(cur_target, links);
4645         if (cur_target != NULL) {
4646                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4647         } else {
4648                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4649         }
4650         bus->generation++;
4651         return (target);
4652 }
4653
4654 static void
4655 xpt_acquire_target(struct cam_et *target)
4656 {
4657         struct cam_eb *bus = target->bus;
4658
4659         mtx_lock(&bus->eb_mtx);
4660         target->refcount++;
4661         mtx_unlock(&bus->eb_mtx);
4662 }
4663
4664 static void
4665 xpt_release_target(struct cam_et *target)
4666 {
4667         struct cam_eb *bus = target->bus;
4668
4669         mtx_lock(&bus->eb_mtx);
4670         if (--target->refcount > 0) {
4671                 mtx_unlock(&bus->eb_mtx);
4672                 return;
4673         }
4674         TAILQ_REMOVE(&bus->et_entries, target, links);
4675         bus->generation++;
4676         mtx_unlock(&bus->eb_mtx);
4677         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4678             ("destroying target, but device list is not empty"));
4679         xpt_release_bus(bus);
4680         mtx_destroy(&target->luns_mtx);
4681         if (target->luns)
4682                 free(target->luns, M_CAMXPT);
4683         free(target, M_CAMXPT);
4684 }
4685
4686 static struct cam_ed *
4687 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4688                          lun_id_t lun_id)
4689 {
4690         struct cam_ed *device;
4691
4692         device = xpt_alloc_device(bus, target, lun_id);
4693         if (device == NULL)
4694                 return (NULL);
4695
4696         device->mintags = 1;
4697         device->maxtags = 1;
4698         return (device);
4699 }
4700
4701 static void
4702 xpt_destroy_device(void *context, int pending)
4703 {
4704         struct cam_ed   *device = context;
4705
4706         mtx_lock(&device->device_mtx);
4707         mtx_destroy(&device->device_mtx);
4708         free(device, M_CAMDEV);
4709 }
4710
4711 struct cam_ed *
4712 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4713 {
4714         struct cam_ed   *cur_device, *device;
4715         struct cam_devq *devq;
4716         cam_status status;
4717
4718         mtx_assert(&bus->eb_mtx, MA_OWNED);
4719         /* Make space for us in the device queue on our bus */
4720         devq = bus->sim->devq;
4721         mtx_lock(&devq->send_mtx);
4722         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4723         mtx_unlock(&devq->send_mtx);
4724         if (status != CAM_REQ_CMP)
4725                 return (NULL);
4726
4727         device = (struct cam_ed *)malloc(sizeof(*device),
4728                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4729         if (device == NULL)
4730                 return (NULL);
4731
4732         cam_init_pinfo(&device->devq_entry);
4733         device->target = target;
4734         device->lun_id = lun_id;
4735         device->sim = bus->sim;
4736         if (cam_ccbq_init(&device->ccbq,
4737                           bus->sim->max_dev_openings) != 0) {
4738                 free(device, M_CAMDEV);
4739                 return (NULL);
4740         }
4741         SLIST_INIT(&device->asyncs);
4742         SLIST_INIT(&device->periphs);
4743         device->generation = 0;
4744         device->flags = CAM_DEV_UNCONFIGURED;
4745         device->tag_delay_count = 0;
4746         device->tag_saved_openings = 0;
4747         device->refcount = 1;
4748         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4749         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4750         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4751         /*
4752          * Hold a reference to our parent bus so it
4753          * will not go away before we do.
4754          */
4755         target->refcount++;
4756
4757         cur_device = TAILQ_FIRST(&target->ed_entries);
4758         while (cur_device != NULL && cur_device->lun_id < lun_id)
4759                 cur_device = TAILQ_NEXT(cur_device, links);
4760         if (cur_device != NULL)
4761                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4762         else
4763                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4764         target->generation++;
4765         return (device);
4766 }
4767
4768 void
4769 xpt_acquire_device(struct cam_ed *device)
4770 {
4771         struct cam_eb *bus = device->target->bus;
4772
4773         mtx_lock(&bus->eb_mtx);
4774         device->refcount++;
4775         mtx_unlock(&bus->eb_mtx);
4776 }
4777
4778 void
4779 xpt_release_device(struct cam_ed *device)
4780 {
4781         struct cam_eb *bus = device->target->bus;
4782         struct cam_devq *devq;
4783
4784         mtx_lock(&bus->eb_mtx);
4785         if (--device->refcount > 0) {
4786                 mtx_unlock(&bus->eb_mtx);
4787                 return;
4788         }
4789
4790         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4791         device->target->generation++;
4792         mtx_unlock(&bus->eb_mtx);
4793
4794         /* Release our slot in the devq */
4795         devq = bus->sim->devq;
4796         mtx_lock(&devq->send_mtx);
4797         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4798         mtx_unlock(&devq->send_mtx);
4799
4800         KASSERT(SLIST_EMPTY(&device->periphs),
4801             ("destroying device, but periphs list is not empty"));
4802         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4803             ("destroying device while still queued for ccbs"));
4804
4805         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4806                 callout_stop(&device->callout);
4807
4808         xpt_release_target(device->target);
4809
4810         cam_ccbq_fini(&device->ccbq);
4811         /*
4812          * Free allocated memory.  free(9) does nothing if the
4813          * supplied pointer is NULL, so it is safe to call without
4814          * checking.
4815          */
4816         free(device->supported_vpds, M_CAMXPT);
4817         free(device->device_id, M_CAMXPT);
4818         free(device->ext_inq, M_CAMXPT);
4819         free(device->physpath, M_CAMXPT);
4820         free(device->rcap_buf, M_CAMXPT);
4821         free(device->serial_num, M_CAMXPT);
4822         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4823 }
4824
4825 u_int32_t
4826 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4827 {
4828         int     result;
4829         struct  cam_ed *dev;
4830
4831         dev = path->device;
4832         mtx_lock(&dev->sim->devq->send_mtx);
4833         result = cam_ccbq_resize(&dev->ccbq, newopenings);
4834         mtx_unlock(&dev->sim->devq->send_mtx);
4835         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4836          || (dev->inq_flags & SID_CmdQue) != 0)
4837                 dev->tag_saved_openings = newopenings;
4838         return (result);
4839 }
4840
4841 static struct cam_eb *
4842 xpt_find_bus(path_id_t path_id)
4843 {
4844         struct cam_eb *bus;
4845
4846         xpt_lock_buses();
4847         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4848              bus != NULL;
4849              bus = TAILQ_NEXT(bus, links)) {
4850                 if (bus->path_id == path_id) {
4851                         bus->refcount++;
4852                         break;
4853                 }
4854         }
4855         xpt_unlock_buses();
4856         return (bus);
4857 }
4858
4859 static struct cam_et *
4860 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4861 {
4862         struct cam_et *target;
4863
4864         mtx_assert(&bus->eb_mtx, MA_OWNED);
4865         for (target = TAILQ_FIRST(&bus->et_entries);
4866              target != NULL;
4867              target = TAILQ_NEXT(target, links)) {
4868                 if (target->target_id == target_id) {
4869                         target->refcount++;
4870                         break;
4871                 }
4872         }
4873         return (target);
4874 }
4875
4876 static struct cam_ed *
4877 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4878 {
4879         struct cam_ed *device;
4880
4881         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
4882         for (device = TAILQ_FIRST(&target->ed_entries);
4883              device != NULL;
4884              device = TAILQ_NEXT(device, links)) {
4885                 if (device->lun_id == lun_id) {
4886                         device->refcount++;
4887                         break;
4888                 }
4889         }
4890         return (device);
4891 }
4892
4893 void
4894 xpt_start_tags(struct cam_path *path)
4895 {
4896         struct ccb_relsim crs;
4897         struct cam_ed *device;
4898         struct cam_sim *sim;
4899         int    newopenings;
4900
4901         device = path->device;
4902         sim = path->bus->sim;
4903         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4904         xpt_freeze_devq(path, /*count*/1);
4905         device->inq_flags |= SID_CmdQue;
4906         if (device->tag_saved_openings != 0)
4907                 newopenings = device->tag_saved_openings;
4908         else
4909                 newopenings = min(device->maxtags,
4910                                   sim->max_tagged_dev_openings);
4911         xpt_dev_ccbq_resize(path, newopenings);
4912         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4913         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4914         crs.ccb_h.func_code = XPT_REL_SIMQ;
4915         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4916         crs.openings
4917             = crs.release_timeout
4918             = crs.qfrozen_cnt
4919             = 0;
4920         xpt_action((union ccb *)&crs);
4921 }
4922
4923 void
4924 xpt_stop_tags(struct cam_path *path)
4925 {
4926         struct ccb_relsim crs;
4927         struct cam_ed *device;
4928         struct cam_sim *sim;
4929
4930         device = path->device;
4931         sim = path->bus->sim;
4932         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4933         device->tag_delay_count = 0;
4934         xpt_freeze_devq(path, /*count*/1);
4935         device->inq_flags &= ~SID_CmdQue;
4936         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
4937         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4938         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4939         crs.ccb_h.func_code = XPT_REL_SIMQ;
4940         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4941         crs.openings
4942             = crs.release_timeout
4943             = crs.qfrozen_cnt
4944             = 0;
4945         xpt_action((union ccb *)&crs);
4946 }
4947
4948 static void
4949 xpt_boot_delay(void *arg)
4950 {
4951
4952         xpt_release_boot();
4953 }
4954
4955 static void
4956 xpt_config(void *arg)
4957 {
4958         /*
4959          * Now that interrupts are enabled, go find our devices
4960          */
4961         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
4962                 printf("xpt_config: failed to create taskqueue thread.\n");
4963
4964         /* Setup debugging path */
4965         if (cam_dflags != CAM_DEBUG_NONE) {
4966                 if (xpt_create_path(&cam_dpath, NULL,
4967                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
4968                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
4969                         printf("xpt_config: xpt_create_path() failed for debug"
4970                                " target %d:%d:%d, debugging disabled\n",
4971                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
4972                         cam_dflags = CAM_DEBUG_NONE;
4973                 }
4974         } else
4975                 cam_dpath = NULL;
4976
4977         periphdriver_init(1);
4978         xpt_hold_boot();
4979         callout_init(&xsoftc.boot_callout, 1);
4980         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
4981             xpt_boot_delay, NULL, 0);
4982         /* Fire up rescan thread. */
4983         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
4984             "cam", "scanner")) {
4985                 printf("xpt_config: failed to create rescan thread.\n");
4986         }
4987 }
4988
4989 void
4990 xpt_hold_boot(void)
4991 {
4992         xpt_lock_buses();
4993         xsoftc.buses_to_config++;
4994         xpt_unlock_buses();
4995 }
4996
4997 void
4998 xpt_release_boot(void)
4999 {
5000         xpt_lock_buses();
5001         xsoftc.buses_to_config--;
5002         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
5003                 struct  xpt_task *task;
5004
5005                 xsoftc.buses_config_done = 1;
5006                 xpt_unlock_buses();
5007                 /* Call manually because we don't have any busses */
5008                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
5009                 if (task != NULL) {
5010                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
5011                         taskqueue_enqueue(taskqueue_thread, &task->task);
5012                 }
5013         } else
5014                 xpt_unlock_buses();
5015 }
5016
5017 /*
5018  * If the given device only has one peripheral attached to it, and if that
5019  * peripheral is the passthrough driver, announce it.  This insures that the
5020  * user sees some sort of announcement for every peripheral in their system.
5021  */
5022 static int
5023 xptpassannouncefunc(struct cam_ed *device, void *arg)
5024 {
5025         struct cam_periph *periph;
5026         int i;
5027
5028         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5029              periph = SLIST_NEXT(periph, periph_links), i++);
5030
5031         periph = SLIST_FIRST(&device->periphs);
5032         if ((i == 1)
5033          && (strncmp(periph->periph_name, "pass", 4) == 0))
5034                 xpt_announce_periph(periph, NULL);
5035
5036         return(1);
5037 }
5038
5039 static void
5040 xpt_finishconfig_task(void *context, int pending)
5041 {
5042
5043         periphdriver_init(2);
5044         /*
5045          * Check for devices with no "standard" peripheral driver
5046          * attached.  For any devices like that, announce the
5047          * passthrough driver so the user will see something.
5048          */
5049         if (!bootverbose)
5050                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5051
5052         /* Release our hook so that the boot can continue. */
5053         config_intrhook_disestablish(xsoftc.xpt_config_hook);
5054         free(xsoftc.xpt_config_hook, M_CAMXPT);
5055         xsoftc.xpt_config_hook = NULL;
5056
5057         free(context, M_CAMXPT);
5058 }
5059
5060 cam_status
5061 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5062                    struct cam_path *path)
5063 {
5064         struct ccb_setasync csa;
5065         cam_status status;
5066         int xptpath = 0;
5067
5068         if (path == NULL) {
5069                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5070                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5071                 if (status != CAM_REQ_CMP)
5072                         return (status);
5073                 xpt_path_lock(path);
5074                 xptpath = 1;
5075         }
5076
5077         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5078         csa.ccb_h.func_code = XPT_SASYNC_CB;
5079         csa.event_enable = event;
5080         csa.callback = cbfunc;
5081         csa.callback_arg = cbarg;
5082         xpt_action((union ccb *)&csa);
5083         status = csa.ccb_h.status;
5084
5085         if (xptpath) {
5086                 xpt_path_unlock(path);
5087                 xpt_free_path(path);
5088         }
5089
5090         if ((status == CAM_REQ_CMP) &&
5091             (csa.event_enable & AC_FOUND_DEVICE)) {
5092                 /*
5093                  * Get this peripheral up to date with all
5094                  * the currently existing devices.
5095                  */
5096                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5097         }
5098         if ((status == CAM_REQ_CMP) &&
5099             (csa.event_enable & AC_PATH_REGISTERED)) {
5100                 /*
5101                  * Get this peripheral up to date with all
5102                  * the currently existing busses.
5103                  */
5104                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5105         }
5106
5107         return (status);
5108 }
5109
5110 static void
5111 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5112 {
5113         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5114
5115         switch (work_ccb->ccb_h.func_code) {
5116         /* Common cases first */
5117         case XPT_PATH_INQ:              /* Path routing inquiry */
5118         {
5119                 struct ccb_pathinq *cpi;
5120
5121                 cpi = &work_ccb->cpi;
5122                 cpi->version_num = 1; /* XXX??? */
5123                 cpi->hba_inquiry = 0;
5124                 cpi->target_sprt = 0;
5125                 cpi->hba_misc = 0;
5126                 cpi->hba_eng_cnt = 0;
5127                 cpi->max_target = 0;
5128                 cpi->max_lun = 0;
5129                 cpi->initiator_id = 0;
5130                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5131                 strncpy(cpi->hba_vid, "", HBA_IDLEN);
5132                 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5133                 cpi->unit_number = sim->unit_number;
5134                 cpi->bus_id = sim->bus_id;
5135                 cpi->base_transfer_speed = 0;
5136                 cpi->protocol = PROTO_UNSPECIFIED;
5137                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5138                 cpi->transport = XPORT_UNSPECIFIED;
5139                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5140                 cpi->ccb_h.status = CAM_REQ_CMP;
5141                 xpt_done(work_ccb);
5142                 break;
5143         }
5144         default:
5145                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5146                 xpt_done(work_ccb);
5147                 break;
5148         }
5149 }
5150
5151 /*
5152  * The xpt as a "controller" has no interrupt sources, so polling
5153  * is a no-op.
5154  */
5155 static void
5156 xptpoll(struct cam_sim *sim)
5157 {
5158 }
5159
5160 void
5161 xpt_lock_buses(void)
5162 {
5163         mtx_lock(&xsoftc.xpt_topo_lock);
5164 }
5165
5166 void
5167 xpt_unlock_buses(void)
5168 {
5169         mtx_unlock(&xsoftc.xpt_topo_lock);
5170 }
5171
5172 struct mtx *
5173 xpt_path_mtx(struct cam_path *path)
5174 {
5175
5176         return (&path->device->device_mtx);
5177 }
5178
5179 static void
5180 xpt_done_process(struct ccb_hdr *ccb_h)
5181 {
5182         struct cam_sim *sim;
5183         struct cam_devq *devq;
5184         struct mtx *mtx = NULL;
5185
5186         if (ccb_h->flags & CAM_HIGH_POWER) {
5187                 struct highpowerlist    *hphead;
5188                 struct cam_ed           *device;
5189
5190                 mtx_lock(&xsoftc.xpt_highpower_lock);
5191                 hphead = &xsoftc.highpowerq;
5192
5193                 device = STAILQ_FIRST(hphead);
5194
5195                 /*
5196                  * Increment the count since this command is done.
5197                  */
5198                 xsoftc.num_highpower++;
5199
5200                 /*
5201                  * Any high powered commands queued up?
5202                  */
5203                 if (device != NULL) {
5204
5205                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5206                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5207
5208                         mtx_lock(&device->sim->devq->send_mtx);
5209                         xpt_release_devq_device(device,
5210                                          /*count*/1, /*runqueue*/TRUE);
5211                         mtx_unlock(&device->sim->devq->send_mtx);
5212                 } else
5213                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5214         }
5215
5216         sim = ccb_h->path->bus->sim;
5217
5218         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5219                 xpt_release_simq(sim, /*run_queue*/FALSE);
5220                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5221         }
5222
5223         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5224          && (ccb_h->status & CAM_DEV_QFRZN)) {
5225                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5226                 ccb_h->status &= ~CAM_DEV_QFRZN;
5227         }
5228
5229         devq = sim->devq;
5230         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5231                 struct cam_ed *dev = ccb_h->path->device;
5232
5233                 mtx_lock(&devq->send_mtx);
5234                 devq->send_active--;
5235                 devq->send_openings++;
5236                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5237
5238                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5239                   && (dev->ccbq.dev_active == 0))) {
5240                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5241                         xpt_release_devq_device(dev, /*count*/1,
5242                                          /*run_queue*/FALSE);
5243                 }
5244
5245                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5246                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5247                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5248                         xpt_release_devq_device(dev, /*count*/1,
5249                                          /*run_queue*/FALSE);
5250                 }
5251
5252                 if (!device_is_queued(dev))
5253                         (void)xpt_schedule_devq(devq, dev);
5254                 xpt_run_devq(devq);
5255                 mtx_unlock(&devq->send_mtx);
5256
5257                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5258                         mtx = xpt_path_mtx(ccb_h->path);
5259                         mtx_lock(mtx);
5260
5261                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5262                          && (--dev->tag_delay_count == 0))
5263                                 xpt_start_tags(ccb_h->path);
5264                 }
5265         }
5266
5267         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5268                 if (mtx == NULL) {
5269                         mtx = xpt_path_mtx(ccb_h->path);
5270                         mtx_lock(mtx);
5271                 }
5272         } else {
5273                 if (mtx != NULL) {
5274                         mtx_unlock(mtx);
5275                         mtx = NULL;
5276                 }
5277         }
5278
5279         /* Call the peripheral driver's callback */
5280         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5281         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5282         if (mtx != NULL)
5283                 mtx_unlock(mtx);
5284 }
5285
5286 void
5287 xpt_done_td(void *arg)
5288 {
5289         struct cam_doneq *queue = arg;
5290         struct ccb_hdr *ccb_h;
5291         STAILQ_HEAD(, ccb_hdr)  doneq;
5292
5293         STAILQ_INIT(&doneq);
5294         mtx_lock(&queue->cam_doneq_mtx);
5295         while (1) {
5296                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5297                         queue->cam_doneq_sleep = 1;
5298                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5299                             PRIBIO, "-", 0);
5300                         queue->cam_doneq_sleep = 0;
5301                 }
5302                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5303                 mtx_unlock(&queue->cam_doneq_mtx);
5304
5305                 THREAD_NO_SLEEPING();
5306                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5307                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5308                         xpt_done_process(ccb_h);
5309                 }
5310                 THREAD_SLEEPING_OK();
5311
5312                 mtx_lock(&queue->cam_doneq_mtx);
5313         }
5314 }
5315
5316 static void
5317 camisr_runqueue(void)
5318 {
5319         struct  ccb_hdr *ccb_h;
5320         struct cam_doneq *queue;
5321         int i;
5322
5323         /* Process global queues. */
5324         for (i = 0; i < cam_num_doneqs; i++) {
5325                 queue = &cam_doneqs[i];
5326                 mtx_lock(&queue->cam_doneq_mtx);
5327                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5328                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5329                         mtx_unlock(&queue->cam_doneq_mtx);
5330                         xpt_done_process(ccb_h);
5331                         mtx_lock(&queue->cam_doneq_mtx);
5332                 }
5333                 mtx_unlock(&queue->cam_doneq_mtx);
5334         }
5335 }