sys/cam/cam_xpt.c

   1 /*-
   2  * Implementation of the Common Access Method Transport (XPT) layer.
   3  *
   4  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   5  *
   6  * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
   7  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions, and the following disclaimer,
  15  *    without modification, immediately at the beginning of the file.
  16  * 2. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include "opt_printf.h"
  33
  34 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD$");
  36
  37 #include <sys/param.h>
  38 #include <sys/bio.h>
  39 #include <sys/bus.h>
  40 #include <sys/systm.h>
  41 #include <sys/types.h>
  42 #include <sys/malloc.h>
  43 #include <sys/kernel.h>
  44 #include <sys/time.h>
  45 #include <sys/conf.h>
  46 #include <sys/fcntl.h>
  47 #include <sys/proc.h>
  48 #include <sys/sbuf.h>
  49 #include <sys/smp.h>
  50 #include <sys/taskqueue.h>
  51
  52 #include <sys/lock.h>
  53 #include <sys/mutex.h>
  54 #include <sys/sysctl.h>
  55 #include <sys/kthread.h>
  56
  57 #include <cam/cam.h>
  58 #include <cam/cam_ccb.h>
  59 #include <cam/cam_iosched.h>
  60 #include <cam/cam_periph.h>
  61 #include <cam/cam_queue.h>
  62 #include <cam/cam_sim.h>
  63 #include <cam/cam_xpt.h>
  64 #include <cam/cam_xpt_sim.h>
  65 #include <cam/cam_xpt_periph.h>
  66 #include <cam/cam_xpt_internal.h>
  67 #include <cam/cam_debug.h>
  68 #include <cam/cam_compat.h>
  69
  70 #include <cam/scsi/scsi_all.h>
  71 #include <cam/scsi/scsi_message.h>
  72 #include <cam/scsi/scsi_pass.h>
  73
  74 #include <machine/md_var.h>     /* geometry translation */
  75 #include <machine/stdarg.h>     /* for xpt_print below */
  76
  77 #include "opt_cam.h"
  78
  79 /* Wild guess based on not wanting to grow the stack too much */
  80 #define XPT_PRINT_MAXLEN        512
  81 #ifdef PRINTF_BUFR_SIZE
  82 #define XPT_PRINT_LEN   PRINTF_BUFR_SIZE
  83 #else
  84 #define XPT_PRINT_LEN   128
  85 #endif
  86 _Static_assert(XPT_PRINT_LEN <= XPT_PRINT_MAXLEN, "XPT_PRINT_LEN is too large");
  87
  88 /*
  89  * This is the maximum number of high powered commands (e.g. start unit)
  90  * that can be outstanding at a particular time.
  91  */
  92 #ifndef CAM_MAX_HIGHPOWER
  93 #define CAM_MAX_HIGHPOWER  4
  94 #endif
  95
  96 /* Datastructures internal to the xpt layer */
  97 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
  98 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
  99 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
 100 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
 101
 102 struct xpt_softc {
 103         uint32_t                xpt_generation;
 104
 105         /* number of high powered commands that can go through right now */
 106         struct mtx              xpt_highpower_lock;
 107         STAILQ_HEAD(highpowerlist, cam_ed)      highpowerq;
 108         int                     num_highpower;
 109
 110         /* queue for handling async rescan requests. */
 111         TAILQ_HEAD(, ccb_hdr) ccb_scanq;
 112         int buses_to_config;
 113         int buses_config_done;
 114         int announce_nosbuf;
 115
 116         /*
 117          * Registered buses
 118          *
 119          * N.B., "busses" is an archaic spelling of "buses".  In new code
 120          * "buses" is preferred.
 121          */
 122         TAILQ_HEAD(,cam_eb)     xpt_busses;
 123         u_int                   bus_generation;
 124
 125         int                     boot_delay;
 126         struct callout          boot_callout;
 127         struct task             boot_task;
 128         struct root_hold_token  xpt_rootmount;
 129
 130         struct mtx              xpt_topo_lock;
 131         struct taskqueue        *xpt_taskq;
 132 };
 133
 134 typedef enum {
 135         DM_RET_COPY             = 0x01,
 136         DM_RET_FLAG_MASK        = 0x0f,
 137         DM_RET_NONE             = 0x00,
 138         DM_RET_STOP             = 0x10,
 139         DM_RET_DESCEND          = 0x20,
 140         DM_RET_ERROR            = 0x30,
 141         DM_RET_ACTION_MASK      = 0xf0
 142 } dev_match_ret;
 143
 144 typedef enum {
 145         XPT_DEPTH_BUS,
 146         XPT_DEPTH_TARGET,
 147         XPT_DEPTH_DEVICE,
 148         XPT_DEPTH_PERIPH
 149 } xpt_traverse_depth;
 150
 151 struct xpt_traverse_config {
 152         xpt_traverse_depth      depth;
 153         void                    *tr_func;
 154         void                    *tr_arg;
 155 };
 156
 157 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 158 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 159 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 160 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 161 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 162
 163 /* Transport layer configuration information */
 164 static struct xpt_softc xsoftc;
 165
 166 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
 167
 168 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
 169            &xsoftc.boot_delay, 0, "Bus registration wait time");
 170 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
 171             &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
 172 SYSCTL_INT(_kern_cam, OID_AUTO, announce_nosbuf, CTLFLAG_RWTUN,
 173             &xsoftc.announce_nosbuf, 0, "Don't use sbuf for announcements");
 174
 175 struct cam_doneq {
 176         struct mtx_padalign     cam_doneq_mtx;
 177         STAILQ_HEAD(, ccb_hdr)  cam_doneq;
 178         int                     cam_doneq_sleep;
 179 };
 180
 181 static struct cam_doneq cam_doneqs[MAXCPU];
 182 static int cam_num_doneqs;
 183 static struct proc *cam_proc;
 184
 185 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
 186            &cam_num_doneqs, 0, "Number of completion queues/threads");
 187
 188 struct cam_periph *xpt_periph;
 189
 190 static periph_init_t xpt_periph_init;
 191
 192 static struct periph_driver xpt_driver =
 193 {
 194         xpt_periph_init, "xpt",
 195         TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
 196         CAM_PERIPH_DRV_EARLY
 197 };
 198
 199 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 200
 201 static d_open_t xptopen;
 202 static d_close_t xptclose;
 203 static d_ioctl_t xptioctl;
 204 static d_ioctl_t xptdoioctl;
 205
 206 static struct cdevsw xpt_cdevsw = {
 207         .d_version =    D_VERSION,
 208         .d_flags =      0,
 209         .d_open =       xptopen,
 210         .d_close =      xptclose,
 211         .d_ioctl =      xptioctl,
 212         .d_name =       "xpt",
 213 };
 214
 215 /* Storage for debugging datastructures */
 216 struct cam_path *cam_dpath;
 217 u_int32_t __read_mostly cam_dflags = CAM_DEBUG_FLAGS;
 218 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN,
 219         &cam_dflags, 0, "Enabled debug flags");
 220 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
 221 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN,
 222         &cam_debug_delay, 0, "Delay in us after each debug message");
 223
 224 /* Our boot-time initialization hook */
 225 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 226
 227 static moduledata_t cam_moduledata = {
 228         "cam",
 229         cam_module_event_handler,
 230         NULL
 231 };
 232
 233 static int      xpt_init(void *);
 234
 235 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 236 MODULE_VERSION(cam, 1);
 237
 238
 239 static void             xpt_async_bcast(struct async_list *async_head,
 240                                         u_int32_t async_code,
 241                                         struct cam_path *path,
 242                                         void *async_arg);
 243 static path_id_t xptnextfreepathid(void);
 244 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 245 static union ccb *xpt_get_ccb(struct cam_periph *periph);
 246 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
 247 static void      xpt_run_allocq(struct cam_periph *periph, int sleep);
 248 static void      xpt_run_allocq_task(void *context, int pending);
 249 static void      xpt_run_devq(struct cam_devq *devq);
 250 static callout_func_t xpt_release_devq_timeout;
 251 static void      xpt_acquire_bus(struct cam_eb *bus);
 252 static void      xpt_release_bus(struct cam_eb *bus);
 253 static uint32_t  xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
 254 static int       xpt_release_devq_device(struct cam_ed *dev, u_int count,
 255                     int run_queue);
 256 static struct cam_et*
 257                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 258 static void      xpt_acquire_target(struct cam_et *target);
 259 static void      xpt_release_target(struct cam_et *target);
 260 static struct cam_eb*
 261                  xpt_find_bus(path_id_t path_id);
 262 static struct cam_et*
 263                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 264 static struct cam_ed*
 265                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 266 static void      xpt_config(void *arg);
 267 static void      xpt_hold_boot_locked(void);
 268 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 269                                  u_int32_t new_priority);
 270 static xpt_devicefunc_t xptpassannouncefunc;
 271 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 272 static void      xptpoll(struct cam_sim *sim);
 273 static void      camisr_runqueue(void);
 274 static void      xpt_done_process(struct ccb_hdr *ccb_h);
 275 static void      xpt_done_td(void *);
 276 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 277                                     u_int num_patterns, struct cam_eb *bus);
 278 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 279                                        u_int num_patterns,
 280                                        struct cam_ed *device);
 281 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 282                                        u_int num_patterns,
 283                                        struct cam_periph *periph);
 284 static xpt_busfunc_t    xptedtbusfunc;
 285 static xpt_targetfunc_t xptedttargetfunc;
 286 static xpt_devicefunc_t xptedtdevicefunc;
 287 static xpt_periphfunc_t xptedtperiphfunc;
 288 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 289 static xpt_periphfunc_t xptplistperiphfunc;
 290 static int              xptedtmatch(struct ccb_dev_match *cdm);
 291 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 292 static int              xptbustraverse(struct cam_eb *start_bus,
 293                                        xpt_busfunc_t *tr_func, void *arg);
 294 static int              xpttargettraverse(struct cam_eb *bus,
 295                                           struct cam_et *start_target,
 296                                           xpt_targetfunc_t *tr_func, void *arg);
 297 static int              xptdevicetraverse(struct cam_et *target,
 298                                           struct cam_ed *start_device,
 299                                           xpt_devicefunc_t *tr_func, void *arg);
 300 static int              xptperiphtraverse(struct cam_ed *device,
 301                                           struct cam_periph *start_periph,
 302                                           xpt_periphfunc_t *tr_func, void *arg);
 303 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 304                                         xpt_pdrvfunc_t *tr_func, void *arg);
 305 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 306                                             struct cam_periph *start_periph,
 307                                             xpt_periphfunc_t *tr_func,
 308                                             void *arg);
 309 static xpt_busfunc_t    xptdefbusfunc;
 310 static xpt_targetfunc_t xptdeftargetfunc;
 311 static xpt_devicefunc_t xptdefdevicefunc;
 312 static xpt_periphfunc_t xptdefperiphfunc;
 313 static void             xpt_finishconfig_task(void *context, int pending);
 314 static void             xpt_dev_async_default(u_int32_t async_code,
 315                                               struct cam_eb *bus,
 316                                               struct cam_et *target,
 317                                               struct cam_ed *device,
 318                                               void *async_arg);
 319 static struct cam_ed *  xpt_alloc_device_default(struct cam_eb *bus,
 320                                                  struct cam_et *target,
 321                                                  lun_id_t lun_id);
 322 static xpt_devicefunc_t xptsetasyncfunc;
 323 static xpt_busfunc_t    xptsetasyncbusfunc;
 324 static cam_status       xptregister(struct cam_periph *periph,
 325                                     void *arg);
 326 static __inline int device_is_queued(struct cam_ed *device);
 327
 328 static __inline int
 329 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 330 {
 331         int     retval;
 332
 333         mtx_assert(&devq->send_mtx, MA_OWNED);
 334         if ((dev->ccbq.queue.entries > 0) &&
 335             (dev->ccbq.dev_openings > 0) &&
 336             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 337                 /*
 338                  * The priority of a device waiting for controller
 339                  * resources is that of the highest priority CCB
 340                  * enqueued.
 341                  */
 342                 retval =
 343                     xpt_schedule_dev(&devq->send_queue,
 344                                      &dev->devq_entry,
 345                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 346         } else {
 347                 retval = 0;
 348         }
 349         return (retval);
 350 }
 351
 352 static __inline int
 353 device_is_queued(struct cam_ed *device)
 354 {
 355         return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
 356 }
 357
 358 static void
 359 xpt_periph_init()
 360 {
 361         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 362 }
 363
 364 static int
 365 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 366 {
 367
 368         /*
 369          * Only allow read-write access.
 370          */
 371         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 372                 return(EPERM);
 373
 374         /*
 375          * We don't allow nonblocking access.
 376          */
 377         if ((flags & O_NONBLOCK) != 0) {
 378                 printf("%s: can't do nonblocking access\n", devtoname(dev));
 379                 return(ENODEV);
 380         }
 381
 382         return(0);
 383 }
 384
 385 static int
 386 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 387 {
 388
 389         return(0);
 390 }
 391
 392 /*
 393  * Don't automatically grab the xpt softc lock here even though this is going
 394  * through the xpt device.  The xpt device is really just a back door for
 395  * accessing other devices and SIMs, so the right thing to do is to grab
 396  * the appropriate SIM lock once the bus/SIM is located.
 397  */
 398 static int
 399 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 400 {
 401         int error;
 402
 403         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 404                 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
 405         }
 406         return (error);
 407 }
 408
 409 static int
 410 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 411 {
 412         int error;
 413
 414         error = 0;
 415
 416         switch(cmd) {
 417         /*
 418          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 419          * to accept CCB types that don't quite make sense to send through a
 420          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 421          * in the CAM spec.
 422          */
 423         case CAMIOCOMMAND: {
 424                 union ccb *ccb;
 425                 union ccb *inccb;
 426                 struct cam_eb *bus;
 427
 428                 inccb = (union ccb *)addr;
 429 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 430                 if (inccb->ccb_h.func_code == XPT_SCSI_IO)
 431                         inccb->csio.bio = NULL;
 432 #endif
 433
 434                 if (inccb->ccb_h.flags & CAM_UNLOCKED)
 435                         return (EINVAL);
 436
 437                 bus = xpt_find_bus(inccb->ccb_h.path_id);
 438                 if (bus == NULL)
 439                         return (EINVAL);
 440
 441                 switch (inccb->ccb_h.func_code) {
 442                 case XPT_SCAN_BUS:
 443                 case XPT_RESET_BUS:
 444                         if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
 445                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 446                                 xpt_release_bus(bus);
 447                                 return (EINVAL);
 448                         }
 449                         break;
 450                 case XPT_SCAN_TGT:
 451                         if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
 452                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 453                                 xpt_release_bus(bus);
 454                                 return (EINVAL);
 455                         }
 456                         break;
 457                 default:
 458                         break;
 459                 }
 460
 461                 switch(inccb->ccb_h.func_code) {
 462                 case XPT_SCAN_BUS:
 463                 case XPT_RESET_BUS:
 464                 case XPT_PATH_INQ:
 465                 case XPT_ENG_INQ:
 466                 case XPT_SCAN_LUN:
 467                 case XPT_SCAN_TGT:
 468
 469                         ccb = xpt_alloc_ccb();
 470
 471                         /*
 472                          * Create a path using the bus, target, and lun the
 473                          * user passed in.
 474                          */
 475                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 476                                             inccb->ccb_h.path_id,
 477                                             inccb->ccb_h.target_id,
 478                                             inccb->ccb_h.target_lun) !=
 479                                             CAM_REQ_CMP){
 480                                 error = EINVAL;
 481                                 xpt_free_ccb(ccb);
 482                                 break;
 483                         }
 484                         /* Ensure all of our fields are correct */
 485                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 486                                       inccb->ccb_h.pinfo.priority);
 487                         xpt_merge_ccb(ccb, inccb);
 488                         xpt_path_lock(ccb->ccb_h.path);
 489                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 490                         xpt_path_unlock(ccb->ccb_h.path);
 491                         bcopy(ccb, inccb, sizeof(union ccb));
 492                         xpt_free_path(ccb->ccb_h.path);
 493                         xpt_free_ccb(ccb);
 494                         break;
 495
 496                 case XPT_DEBUG: {
 497                         union ccb ccb;
 498
 499                         /*
 500                          * This is an immediate CCB, so it's okay to
 501                          * allocate it on the stack.
 502                          */
 503
 504                         /*
 505                          * Create a path using the bus, target, and lun the
 506                          * user passed in.
 507                          */
 508                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 509                                             inccb->ccb_h.path_id,
 510                                             inccb->ccb_h.target_id,
 511                                             inccb->ccb_h.target_lun) !=
 512                                             CAM_REQ_CMP){
 513                                 error = EINVAL;
 514                                 break;
 515                         }
 516                         /* Ensure all of our fields are correct */
 517                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 518                                       inccb->ccb_h.pinfo.priority);
 519                         xpt_merge_ccb(&ccb, inccb);
 520                         xpt_action(&ccb);
 521                         bcopy(&ccb, inccb, sizeof(union ccb));
 522                         xpt_free_path(ccb.ccb_h.path);
 523                         break;
 524
 525                 }
 526                 case XPT_DEV_MATCH: {
 527                         struct cam_periph_map_info mapinfo;
 528                         struct cam_path *old_path;
 529
 530                         /*
 531                          * We can't deal with physical addresses for this
 532                          * type of transaction.
 533                          */
 534                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 535                             CAM_DATA_VADDR) {
 536                                 error = EINVAL;
 537                                 break;
 538                         }
 539
 540                         /*
 541                          * Save this in case the caller had it set to
 542                          * something in particular.
 543                          */
 544                         old_path = inccb->ccb_h.path;
 545
 546                         /*
 547                          * We really don't need a path for the matching
 548                          * code.  The path is needed because of the
 549                          * debugging statements in xpt_action().  They
 550                          * assume that the CCB has a valid path.
 551                          */
 552                         inccb->ccb_h.path = xpt_periph->path;
 553
 554                         bzero(&mapinfo, sizeof(mapinfo));
 555
 556                         /*
 557                          * Map the pattern and match buffers into kernel
 558                          * virtual address space.
 559                          */
 560                         error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS);
 561
 562                         if (error) {
 563                                 inccb->ccb_h.path = old_path;
 564                                 break;
 565                         }
 566
 567                         /*
 568                          * This is an immediate CCB, we can send it on directly.
 569                          */
 570                         xpt_action(inccb);
 571
 572                         /*
 573                          * Map the buffers back into user space.
 574                          */
 575                         cam_periph_unmapmem(inccb, &mapinfo);
 576
 577                         inccb->ccb_h.path = old_path;
 578
 579                         error = 0;
 580                         break;
 581                 }
 582                 default:
 583                         error = ENOTSUP;
 584                         break;
 585                 }
 586                 xpt_release_bus(bus);
 587                 break;
 588         }
 589         /*
 590          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 591          * with the periphal driver name and unit name filled in.  The other
 592          * fields don't really matter as input.  The passthrough driver name
 593          * ("pass"), and unit number are passed back in the ccb.  The current
 594          * device generation number, and the index into the device peripheral
 595          * driver list, and the status are also passed back.  Note that
 596          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 597          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 598          * (or rather should be) impossible for the device peripheral driver
 599          * list to change since we look at the whole thing in one pass, and
 600          * we do it with lock protection.
 601          *
 602          */
 603         case CAMGETPASSTHRU: {
 604                 union ccb *ccb;
 605                 struct cam_periph *periph;
 606                 struct periph_driver **p_drv;
 607                 char   *name;
 608                 u_int unit;
 609                 int base_periph_found;
 610
 611                 ccb = (union ccb *)addr;
 612                 unit = ccb->cgdl.unit_number;
 613                 name = ccb->cgdl.periph_name;
 614                 base_periph_found = 0;
 615 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 616                 if (ccb->ccb_h.func_code == XPT_SCSI_IO)
 617                         ccb->csio.bio = NULL;
 618 #endif
 619
 620                 /*
 621                  * Sanity check -- make sure we don't get a null peripheral
 622                  * driver name.
 623                  */
 624                 if (*ccb->cgdl.periph_name == '\0') {
 625                         error = EINVAL;
 626                         break;
 627                 }
 628
 629                 /* Keep the list from changing while we traverse it */
 630                 xpt_lock_buses();
 631
 632                 /* first find our driver in the list of drivers */
 633                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 634                         if (strcmp((*p_drv)->driver_name, name) == 0)
 635                                 break;
 636
 637                 if (*p_drv == NULL) {
 638                         xpt_unlock_buses();
 639                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 640                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 641                         *ccb->cgdl.periph_name = '\0';
 642                         ccb->cgdl.unit_number = 0;
 643                         error = ENOENT;
 644                         break;
 645                 }
 646
 647                 /*
 648                  * Run through every peripheral instance of this driver
 649                  * and check to see whether it matches the unit passed
 650                  * in by the user.  If it does, get out of the loops and
 651                  * find the passthrough driver associated with that
 652                  * peripheral driver.
 653                  */
 654                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 655                      periph = TAILQ_NEXT(periph, unit_links)) {
 656
 657                         if (periph->unit_number == unit)
 658                                 break;
 659                 }
 660                 /*
 661                  * If we found the peripheral driver that the user passed
 662                  * in, go through all of the peripheral drivers for that
 663                  * particular device and look for a passthrough driver.
 664                  */
 665                 if (periph != NULL) {
 666                         struct cam_ed *device;
 667                         int i;
 668
 669                         base_periph_found = 1;
 670                         device = periph->path->device;
 671                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 672                              periph != NULL;
 673                              periph = SLIST_NEXT(periph, periph_links), i++) {
 674                                 /*
 675                                  * Check to see whether we have a
 676                                  * passthrough device or not.
 677                                  */
 678                                 if (strcmp(periph->periph_name, "pass") == 0) {
 679                                         /*
 680                                          * Fill in the getdevlist fields.
 681                                          */
 682                                         strlcpy(ccb->cgdl.periph_name,
 683                                                periph->periph_name,
 684                                                sizeof(ccb->cgdl.periph_name));
 685                                         ccb->cgdl.unit_number =
 686                                                 periph->unit_number;
 687                                         if (SLIST_NEXT(periph, periph_links))
 688                                                 ccb->cgdl.status =
 689                                                         CAM_GDEVLIST_MORE_DEVS;
 690                                         else
 691                                                 ccb->cgdl.status =
 692                                                        CAM_GDEVLIST_LAST_DEVICE;
 693                                         ccb->cgdl.generation =
 694                                                 device->generation;
 695                                         ccb->cgdl.index = i;
 696                                         /*
 697                                          * Fill in some CCB header fields
 698                                          * that the user may want.
 699                                          */
 700                                         ccb->ccb_h.path_id =
 701                                                 periph->path->bus->path_id;
 702                                         ccb->ccb_h.target_id =
 703                                                 periph->path->target->target_id;
 704                                         ccb->ccb_h.target_lun =
 705                                                 periph->path->device->lun_id;
 706                                         ccb->ccb_h.status = CAM_REQ_CMP;
 707                                         break;
 708                                 }
 709                         }
 710                 }
 711
 712                 /*
 713                  * If the periph is null here, one of two things has
 714                  * happened.  The first possibility is that we couldn't
 715                  * find the unit number of the particular peripheral driver
 716                  * that the user is asking about.  e.g. the user asks for
 717                  * the passthrough driver for "da11".  We find the list of
 718                  * "da" peripherals all right, but there is no unit 11.
 719                  * The other possibility is that we went through the list
 720                  * of peripheral drivers attached to the device structure,
 721                  * but didn't find one with the name "pass".  Either way,
 722                  * we return ENOENT, since we couldn't find something.
 723                  */
 724                 if (periph == NULL) {
 725                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 726                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 727                         *ccb->cgdl.periph_name = '\0';
 728                         ccb->cgdl.unit_number = 0;
 729                         error = ENOENT;
 730                         /*
 731                          * It is unfortunate that this is even necessary,
 732                          * but there are many, many clueless users out there.
 733                          * If this is true, the user is looking for the
 734                          * passthrough driver, but doesn't have one in his
 735                          * kernel.
 736                          */
 737                         if (base_periph_found == 1) {
 738                                 printf("xptioctl: pass driver is not in the "
 739                                        "kernel\n");
 740                                 printf("xptioctl: put \"device pass\" in "
 741                                        "your kernel config file\n");
 742                         }
 743                 }
 744                 xpt_unlock_buses();
 745                 break;
 746                 }
 747         default:
 748                 error = ENOTTY;
 749                 break;
 750         }
 751
 752         return(error);
 753 }
 754
 755 static int
 756 cam_module_event_handler(module_t mod, int what, void *arg)
 757 {
 758         int error;
 759
 760         switch (what) {
 761         case MOD_LOAD:
 762                 if ((error = xpt_init(NULL)) != 0)
 763                         return (error);
 764                 break;
 765         case MOD_UNLOAD:
 766                 return EBUSY;
 767         default:
 768                 return EOPNOTSUPP;
 769         }
 770
 771         return 0;
 772 }
 773
 774 static struct xpt_proto *
 775 xpt_proto_find(cam_proto proto)
 776 {
 777         struct xpt_proto **pp;
 778
 779         SET_FOREACH(pp, cam_xpt_proto_set) {
 780                 if ((*pp)->proto == proto)
 781                         return *pp;
 782         }
 783
 784         return NULL;
 785 }
 786
 787 static void
 788 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 789 {
 790
 791         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 792                 xpt_free_path(done_ccb->ccb_h.path);
 793                 xpt_free_ccb(done_ccb);
 794         } else {
 795                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 796                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 797         }
 798         xpt_release_boot();
 799 }
 800
 801 /* thread to handle bus rescans */
 802 static void
 803 xpt_scanner_thread(void *dummy)
 804 {
 805         union ccb       *ccb;
 806         struct cam_path  path;
 807
 808         xpt_lock_buses();
 809         for (;;) {
 810                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 811                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 812                                "-", 0);
 813                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 814                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 815                         xpt_unlock_buses();
 816
 817                         /*
 818                          * Since lock can be dropped inside and path freed
 819                          * by completion callback even before return here,
 820                          * take our own path copy for reference.
 821                          */
 822                         xpt_copy_path(&path, ccb->ccb_h.path);
 823                         xpt_path_lock(&path);
 824                         xpt_action(ccb);
 825                         xpt_path_unlock(&path);
 826                         xpt_release_path(&path);
 827
 828                         xpt_lock_buses();
 829                 }
 830         }
 831 }
 832
 833 void
 834 xpt_rescan(union ccb *ccb)
 835 {
 836         struct ccb_hdr *hdr;
 837
 838         /* Prepare request */
 839         if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
 840             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 841                 ccb->ccb_h.func_code = XPT_SCAN_BUS;
 842         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 843             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 844                 ccb->ccb_h.func_code = XPT_SCAN_TGT;
 845         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 846             ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
 847                 ccb->ccb_h.func_code = XPT_SCAN_LUN;
 848         else {
 849                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 850                 xpt_free_path(ccb->ccb_h.path);
 851                 xpt_free_ccb(ccb);
 852                 return;
 853         }
 854         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
 855             ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code,
 856                 xpt_action_name(ccb->ccb_h.func_code)));
 857
 858         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 859         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 860         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 861         /* Don't make duplicate entries for the same paths. */
 862         xpt_lock_buses();
 863         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 864                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 865                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 866                                 wakeup(&xsoftc.ccb_scanq);
 867                                 xpt_unlock_buses();
 868                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 869                                 xpt_free_path(ccb->ccb_h.path);
 870                                 xpt_free_ccb(ccb);
 871                                 return;
 872                         }
 873                 }
 874         }
 875         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 876         xpt_hold_boot_locked();
 877         wakeup(&xsoftc.ccb_scanq);
 878         xpt_unlock_buses();
 879 }
 880
 881 /* Functions accessed by the peripheral drivers */
 882 static int
 883 xpt_init(void *dummy)
 884 {
 885         struct cam_sim *xpt_sim;
 886         struct cam_path *path;
 887         struct cam_devq *devq;
 888         cam_status status;
 889         int error, i;
 890
 891         TAILQ_INIT(&xsoftc.xpt_busses);
 892         TAILQ_INIT(&xsoftc.ccb_scanq);
 893         STAILQ_INIT(&xsoftc.highpowerq);
 894         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 895
 896         mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
 897         xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
 898             taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
 899
 900 #ifdef CAM_BOOT_DELAY
 901         /*
 902          * Override this value at compile time to assist our users
 903          * who don't use loader to boot a kernel.
 904          */
 905         xsoftc.boot_delay = CAM_BOOT_DELAY;
 906 #endif
 907
 908         /*
 909          * The xpt layer is, itself, the equivalent of a SIM.
 910          * Allow 16 ccbs in the ccb pool for it.  This should
 911          * give decent parallelism when we probe buses and
 912          * perform other XPT functions.
 913          */
 914         devq = cam_simq_alloc(16);
 915         xpt_sim = cam_sim_alloc(xptaction,
 916                                 xptpoll,
 917                                 "xpt",
 918                                 /*softc*/NULL,
 919                                 /*unit*/0,
 920                                 /*mtx*/NULL,
 921                                 /*max_dev_transactions*/0,
 922                                 /*max_tagged_dev_transactions*/0,
 923                                 devq);
 924         if (xpt_sim == NULL)
 925                 return (ENOMEM);
 926
 927         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 928                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 929                        " failing attach\n", status);
 930                 return (EINVAL);
 931         }
 932
 933         /*
 934          * Looking at the XPT from the SIM layer, the XPT is
 935          * the equivalent of a peripheral driver.  Allocate
 936          * a peripheral driver entry for us.
 937          */
 938         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 939                                       CAM_TARGET_WILDCARD,
 940                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 941                 printf("xpt_init: xpt_create_path failed with status %#x,"
 942                        " failing attach\n", status);
 943                 return (EINVAL);
 944         }
 945         xpt_path_lock(path);
 946         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 947                          path, NULL, 0, xpt_sim);
 948         xpt_path_unlock(path);
 949         xpt_free_path(path);
 950
 951         if (cam_num_doneqs < 1)
 952                 cam_num_doneqs = 1 + mp_ncpus / 6;
 953         else if (cam_num_doneqs > MAXCPU)
 954                 cam_num_doneqs = MAXCPU;
 955         for (i = 0; i < cam_num_doneqs; i++) {
 956                 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 957                     MTX_DEF);
 958                 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
 959                 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 960                     &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 961                 if (error != 0) {
 962                         cam_num_doneqs = i;
 963                         break;
 964                 }
 965         }
 966         if (cam_num_doneqs < 1) {
 967                 printf("xpt_init: Cannot init completion queues "
 968                        "- failing attach\n");
 969                 return (ENOMEM);
 970         }
 971
 972         /*
 973          * Register a callback for when interrupts are enabled.
 974          */
 975         config_intrhook_oneshot(xpt_config, NULL);
 976
 977         return (0);
 978 }
 979
 980 static cam_status
 981 xptregister(struct cam_periph *periph, void *arg)
 982 {
 983         struct cam_sim *xpt_sim;
 984
 985         if (periph == NULL) {
 986                 printf("xptregister: periph was NULL!!\n");
 987                 return(CAM_REQ_CMP_ERR);
 988         }
 989
 990         xpt_sim = (struct cam_sim *)arg;
 991         xpt_sim->softc = periph;
 992         xpt_periph = periph;
 993         periph->softc = NULL;
 994
 995         return(CAM_REQ_CMP);
 996 }
 997
 998 int32_t
 999 xpt_add_periph(struct cam_periph *periph)
1000 {
1001         struct cam_ed *device;
1002         int32_t  status;
1003
1004         TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
1005         device = periph->path->device;
1006         status = CAM_REQ_CMP;
1007         if (device != NULL) {
1008                 mtx_lock(&device->target->bus->eb_mtx);
1009                 device->generation++;
1010                 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
1011                 mtx_unlock(&device->target->bus->eb_mtx);
1012                 atomic_add_32(&xsoftc.xpt_generation, 1);
1013         }
1014
1015         return (status);
1016 }
1017
1018 void
1019 xpt_remove_periph(struct cam_periph *periph)
1020 {
1021         struct cam_ed *device;
1022
1023         device = periph->path->device;
1024         if (device != NULL) {
1025                 mtx_lock(&device->target->bus->eb_mtx);
1026                 device->generation++;
1027                 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1028                 mtx_unlock(&device->target->bus->eb_mtx);
1029                 atomic_add_32(&xsoftc.xpt_generation, 1);
1030         }
1031 }
1032
1033
1034 void
1035 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1036 {
1037         struct  cam_path *path = periph->path;
1038         struct  xpt_proto *proto;
1039
1040         cam_periph_assert(periph, MA_OWNED);
1041         periph->flags |= CAM_PERIPH_ANNOUNCED;
1042
1043         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1044                periph->periph_name, periph->unit_number,
1045                path->bus->sim->sim_name,
1046                path->bus->sim->unit_number,
1047                path->bus->sim->bus_id,
1048                path->bus->path_id,
1049                path->target->target_id,
1050                (uintmax_t)path->device->lun_id);
1051         printf("%s%d: ", periph->periph_name, periph->unit_number);
1052         proto = xpt_proto_find(path->device->protocol);
1053         if (proto)
1054                 proto->ops->announce(path->device);
1055         else
1056                 printf("%s%d: Unknown protocol device %d\n",
1057                     periph->periph_name, periph->unit_number,
1058                     path->device->protocol);
1059         if (path->device->serial_num_len > 0) {
1060                 /* Don't wrap the screen  - print only the first 60 chars */
1061                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1062                        periph->unit_number, path->device->serial_num);
1063         }
1064         /* Announce transport details. */
1065         path->bus->xport->ops->announce(periph);
1066         /* Announce command queueing. */
1067         if (path->device->inq_flags & SID_CmdQue
1068          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1069                 printf("%s%d: Command Queueing enabled\n",
1070                        periph->periph_name, periph->unit_number);
1071         }
1072         /* Announce caller's details if they've passed in. */
1073         if (announce_string != NULL)
1074                 printf("%s%d: %s\n", periph->periph_name,
1075                        periph->unit_number, announce_string);
1076 }
1077
1078 void
1079 xpt_announce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb,
1080     char *announce_string)
1081 {
1082         struct  cam_path *path = periph->path;
1083         struct  xpt_proto *proto;
1084
1085         cam_periph_assert(periph, MA_OWNED);
1086         periph->flags |= CAM_PERIPH_ANNOUNCED;
1087
1088         /* Fall back to the non-sbuf method if necessary */
1089         if (xsoftc.announce_nosbuf != 0) {
1090                 xpt_announce_periph(periph, announce_string);
1091                 return;
1092         }
1093         proto = xpt_proto_find(path->device->protocol);
1094         if (((proto != NULL) && (proto->ops->announce_sbuf == NULL)) ||
1095             (path->bus->xport->ops->announce_sbuf == NULL)) {
1096                 xpt_announce_periph(periph, announce_string);
1097                 return;
1098         }
1099
1100         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1101             periph->periph_name, periph->unit_number,
1102             path->bus->sim->sim_name,
1103             path->bus->sim->unit_number,
1104             path->bus->sim->bus_id,
1105             path->bus->path_id,
1106             path->target->target_id,
1107             (uintmax_t)path->device->lun_id);
1108         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1109
1110         if (proto)
1111                 proto->ops->announce_sbuf(path->device, sb);
1112         else
1113                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1114                     periph->periph_name, periph->unit_number,
1115                     path->device->protocol);
1116         if (path->device->serial_num_len > 0) {
1117                 /* Don't wrap the screen  - print only the first 60 chars */
1118                 sbuf_printf(sb, "%s%d: Serial Number %.60s\n",
1119                     periph->periph_name, periph->unit_number,
1120                     path->device->serial_num);
1121         }
1122         /* Announce transport details. */
1123         path->bus->xport->ops->announce_sbuf(periph, sb);
1124         /* Announce command queueing. */
1125         if (path->device->inq_flags & SID_CmdQue
1126          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1127                 sbuf_printf(sb, "%s%d: Command Queueing enabled\n",
1128                     periph->periph_name, periph->unit_number);
1129         }
1130         /* Announce caller's details if they've passed in. */
1131         if (announce_string != NULL)
1132                 sbuf_printf(sb, "%s%d: %s\n", periph->periph_name,
1133                     periph->unit_number, announce_string);
1134 }
1135
1136 void
1137 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1138 {
1139         if (quirks != 0) {
1140                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1141                     periph->unit_number, quirks, bit_string);
1142         }
1143 }
1144
1145 void
1146 xpt_announce_quirks_sbuf(struct cam_periph *periph, struct sbuf *sb,
1147                          int quirks, char *bit_string)
1148 {
1149         if (xsoftc.announce_nosbuf != 0) {
1150                 xpt_announce_quirks(periph, quirks, bit_string);
1151                 return;
1152         }
1153
1154         if (quirks != 0) {
1155                 sbuf_printf(sb, "%s%d: quirks=0x%b\n", periph->periph_name,
1156                     periph->unit_number, quirks, bit_string);
1157         }
1158 }
1159
1160 void
1161 xpt_denounce_periph(struct cam_periph *periph)
1162 {
1163         struct  cam_path *path = periph->path;
1164         struct  xpt_proto *proto;
1165
1166         cam_periph_assert(periph, MA_OWNED);
1167         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1168                periph->periph_name, periph->unit_number,
1169                path->bus->sim->sim_name,
1170                path->bus->sim->unit_number,
1171                path->bus->sim->bus_id,
1172                path->bus->path_id,
1173                path->target->target_id,
1174                (uintmax_t)path->device->lun_id);
1175         printf("%s%d: ", periph->periph_name, periph->unit_number);
1176         proto = xpt_proto_find(path->device->protocol);
1177         if (proto)
1178                 proto->ops->denounce(path->device);
1179         else
1180                 printf("%s%d: Unknown protocol device %d\n",
1181                     periph->periph_name, periph->unit_number,
1182                     path->device->protocol);
1183         if (path->device->serial_num_len > 0)
1184                 printf(" s/n %.60s", path->device->serial_num);
1185         printf(" detached\n");
1186 }
1187
1188 void
1189 xpt_denounce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb)
1190 {
1191         struct cam_path *path = periph->path;
1192         struct xpt_proto *proto;
1193
1194         cam_periph_assert(periph, MA_OWNED);
1195
1196         /* Fall back to the non-sbuf method if necessary */
1197         if (xsoftc.announce_nosbuf != 0) {
1198                 xpt_denounce_periph(periph);
1199                 return;
1200         }
1201         proto = xpt_proto_find(path->device->protocol);
1202         if ((proto != NULL) && (proto->ops->denounce_sbuf == NULL)) {
1203                 xpt_denounce_periph(periph);
1204                 return;
1205         }
1206
1207         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1208             periph->periph_name, periph->unit_number,
1209             path->bus->sim->sim_name,
1210             path->bus->sim->unit_number,
1211             path->bus->sim->bus_id,
1212             path->bus->path_id,
1213             path->target->target_id,
1214             (uintmax_t)path->device->lun_id);
1215         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1216
1217         if (proto)
1218                 proto->ops->denounce_sbuf(path->device, sb);
1219         else
1220                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1221                     periph->periph_name, periph->unit_number,
1222                     path->device->protocol);
1223         if (path->device->serial_num_len > 0)
1224                 sbuf_printf(sb, " s/n %.60s", path->device->serial_num);
1225         sbuf_printf(sb, " detached\n");
1226 }
1227
1228 int
1229 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1230 {
1231         int ret = -1, l, o;
1232         struct ccb_dev_advinfo cdai;
1233         struct scsi_vpd_device_id *did;
1234         struct scsi_vpd_id_descriptor *idd;
1235
1236         xpt_path_assert(path, MA_OWNED);
1237
1238         memset(&cdai, 0, sizeof(cdai));
1239         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1240         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1241         cdai.flags = CDAI_FLAG_NONE;
1242         cdai.bufsiz = len;
1243         cdai.buf = buf;
1244
1245         if (!strcmp(attr, "GEOM::ident"))
1246                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1247         else if (!strcmp(attr, "GEOM::physpath"))
1248                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1249         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1250                  strcmp(attr, "GEOM::lunname") == 0) {
1251                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1252                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1253                 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT);
1254                 if (cdai.buf == NULL) {
1255                         ret = ENOMEM;
1256                         goto out;
1257                 }
1258         } else
1259                 goto out;
1260
1261         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1262         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1263                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1264         if (cdai.provsiz == 0)
1265                 goto out;
1266         switch(cdai.buftype) {
1267         case CDAI_TYPE_SCSI_DEVID:
1268                 did = (struct scsi_vpd_device_id *)cdai.buf;
1269                 if (strcmp(attr, "GEOM::lunid") == 0) {
1270                         idd = scsi_get_devid(did, cdai.provsiz,
1271                             scsi_devid_is_lun_naa);
1272                         if (idd == NULL)
1273                                 idd = scsi_get_devid(did, cdai.provsiz,
1274                                     scsi_devid_is_lun_eui64);
1275                         if (idd == NULL)
1276                                 idd = scsi_get_devid(did, cdai.provsiz,
1277                                     scsi_devid_is_lun_uuid);
1278                         if (idd == NULL)
1279                                 idd = scsi_get_devid(did, cdai.provsiz,
1280                                     scsi_devid_is_lun_md5);
1281                 } else
1282                         idd = NULL;
1283
1284                 if (idd == NULL)
1285                         idd = scsi_get_devid(did, cdai.provsiz,
1286                             scsi_devid_is_lun_t10);
1287                 if (idd == NULL)
1288                         idd = scsi_get_devid(did, cdai.provsiz,
1289                             scsi_devid_is_lun_name);
1290                 if (idd == NULL)
1291                         break;
1292
1293                 ret = 0;
1294                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) ==
1295                     SVPD_ID_CODESET_ASCII) {
1296                         if (idd->length < len) {
1297                                 for (l = 0; l < idd->length; l++)
1298                                         buf[l] = idd->identifier[l] ?
1299                                             idd->identifier[l] : ' ';
1300                                 buf[l] = 0;
1301                         } else
1302                                 ret = EFAULT;
1303                         break;
1304                 }
1305                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) ==
1306                     SVPD_ID_CODESET_UTF8) {
1307                         l = strnlen(idd->identifier, idd->length);
1308                         if (l < len) {
1309                                 bcopy(idd->identifier, buf, l);
1310                                 buf[l] = 0;
1311                         } else
1312                                 ret = EFAULT;
1313                         break;
1314                 }
1315                 if ((idd->id_type & SVPD_ID_TYPE_MASK) ==
1316                     SVPD_ID_TYPE_UUID && idd->identifier[0] == 0x10) {
1317                         if ((idd->length - 2) * 2 + 4 >= len) {
1318                                 ret = EFAULT;
1319                                 break;
1320                         }
1321                         for (l = 2, o = 0; l < idd->length; l++) {
1322                                 if (l == 6 || l == 8 || l == 10 || l == 12)
1323                                     o += sprintf(buf + o, "-");
1324                                 o += sprintf(buf + o, "%02x",
1325                                     idd->identifier[l]);
1326                         }
1327                         break;
1328                 }
1329                 if (idd->length * 2 < len) {
1330                         for (l = 0; l < idd->length; l++)
1331                                 sprintf(buf + l * 2, "%02x",
1332                                     idd->identifier[l]);
1333                 } else
1334                                 ret = EFAULT;
1335                 break;
1336         default:
1337                 if (cdai.provsiz < len) {
1338                         cdai.buf[cdai.provsiz] = 0;
1339                         ret = 0;
1340                 } else
1341                         ret = EFAULT;
1342                 break;
1343         }
1344
1345 out:
1346         if ((char *)cdai.buf != buf)
1347                 free(cdai.buf, M_CAMXPT);
1348         return ret;
1349 }
1350
1351 static dev_match_ret
1352 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1353             struct cam_eb *bus)
1354 {
1355         dev_match_ret retval;
1356         u_int i;
1357
1358         retval = DM_RET_NONE;
1359
1360         /*
1361          * If we aren't given something to match against, that's an error.
1362          */
1363         if (bus == NULL)
1364                 return(DM_RET_ERROR);
1365
1366         /*
1367          * If there are no match entries, then this bus matches no
1368          * matter what.
1369          */
1370         if ((patterns == NULL) || (num_patterns == 0))
1371                 return(DM_RET_DESCEND | DM_RET_COPY);
1372
1373         for (i = 0; i < num_patterns; i++) {
1374                 struct bus_match_pattern *cur_pattern;
1375
1376                 /*
1377                  * If the pattern in question isn't for a bus node, we
1378                  * aren't interested.  However, we do indicate to the
1379                  * calling routine that we should continue descending the
1380                  * tree, since the user wants to match against lower-level
1381                  * EDT elements.
1382                  */
1383                 if (patterns[i].type != DEV_MATCH_BUS) {
1384                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1385                                 retval |= DM_RET_DESCEND;
1386                         continue;
1387                 }
1388
1389                 cur_pattern = &patterns[i].pattern.bus_pattern;
1390
1391                 /*
1392                  * If they want to match any bus node, we give them any
1393                  * device node.
1394                  */
1395                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1396                         /* set the copy flag */
1397                         retval |= DM_RET_COPY;
1398
1399                         /*
1400                          * If we've already decided on an action, go ahead
1401                          * and return.
1402                          */
1403                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1404                                 return(retval);
1405                 }
1406
1407                 /*
1408                  * Not sure why someone would do this...
1409                  */
1410                 if (cur_pattern->flags == BUS_MATCH_NONE)
1411                         continue;
1412
1413                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1414                  && (cur_pattern->path_id != bus->path_id))
1415                         continue;
1416
1417                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1418                  && (cur_pattern->bus_id != bus->sim->bus_id))
1419                         continue;
1420
1421                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1422                  && (cur_pattern->unit_number != bus->sim->unit_number))
1423                         continue;
1424
1425                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1426                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1427                              DEV_IDLEN) != 0))
1428                         continue;
1429
1430                 /*
1431                  * If we get to this point, the user definitely wants
1432                  * information on this bus.  So tell the caller to copy the
1433                  * data out.
1434                  */
1435                 retval |= DM_RET_COPY;
1436
1437                 /*
1438                  * If the return action has been set to descend, then we
1439                  * know that we've already seen a non-bus matching
1440                  * expression, therefore we need to further descend the tree.
1441                  * This won't change by continuing around the loop, so we
1442                  * go ahead and return.  If we haven't seen a non-bus
1443                  * matching expression, we keep going around the loop until
1444                  * we exhaust the matching expressions.  We'll set the stop
1445                  * flag once we fall out of the loop.
1446                  */
1447                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1448                         return(retval);
1449         }
1450
1451         /*
1452          * If the return action hasn't been set to descend yet, that means
1453          * we haven't seen anything other than bus matching patterns.  So
1454          * tell the caller to stop descending the tree -- the user doesn't
1455          * want to match against lower level tree elements.
1456          */
1457         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1458                 retval |= DM_RET_STOP;
1459
1460         return(retval);
1461 }
1462
1463 static dev_match_ret
1464 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1465                struct cam_ed *device)
1466 {
1467         dev_match_ret retval;
1468         u_int i;
1469
1470         retval = DM_RET_NONE;
1471
1472         /*
1473          * If we aren't given something to match against, that's an error.
1474          */
1475         if (device == NULL)
1476                 return(DM_RET_ERROR);
1477
1478         /*
1479          * If there are no match entries, then this device matches no
1480          * matter what.
1481          */
1482         if ((patterns == NULL) || (num_patterns == 0))
1483                 return(DM_RET_DESCEND | DM_RET_COPY);
1484
1485         for (i = 0; i < num_patterns; i++) {
1486                 struct device_match_pattern *cur_pattern;
1487                 struct scsi_vpd_device_id *device_id_page;
1488
1489                 /*
1490                  * If the pattern in question isn't for a device node, we
1491                  * aren't interested.
1492                  */
1493                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1494                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1495                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1496                                 retval |= DM_RET_DESCEND;
1497                         continue;
1498                 }
1499
1500                 cur_pattern = &patterns[i].pattern.device_pattern;
1501
1502                 /* Error out if mutually exclusive options are specified. */
1503                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1504                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1505                         return(DM_RET_ERROR);
1506
1507                 /*
1508                  * If they want to match any device node, we give them any
1509                  * device node.
1510                  */
1511                 if (cur_pattern->flags == DEV_MATCH_ANY)
1512                         goto copy_dev_node;
1513
1514                 /*
1515                  * Not sure why someone would do this...
1516                  */
1517                 if (cur_pattern->flags == DEV_MATCH_NONE)
1518                         continue;
1519
1520                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1521                  && (cur_pattern->path_id != device->target->bus->path_id))
1522                         continue;
1523
1524                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1525                  && (cur_pattern->target_id != device->target->target_id))
1526                         continue;
1527
1528                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1529                  && (cur_pattern->target_lun != device->lun_id))
1530                         continue;
1531
1532                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1533                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1534                                     (caddr_t)&cur_pattern->data.inq_pat,
1535                                     1, sizeof(cur_pattern->data.inq_pat),
1536                                     scsi_static_inquiry_match) == NULL))
1537                         continue;
1538
1539                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1540                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1541                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1542                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1543                                       device->device_id_len
1544                                     - SVPD_DEVICE_ID_HDR_LEN,
1545                                       cur_pattern->data.devid_pat.id,
1546                                       cur_pattern->data.devid_pat.id_len) != 0))
1547                         continue;
1548
1549 copy_dev_node:
1550                 /*
1551                  * If we get to this point, the user definitely wants
1552                  * information on this device.  So tell the caller to copy
1553                  * the data out.
1554                  */
1555                 retval |= DM_RET_COPY;
1556
1557                 /*
1558                  * If the return action has been set to descend, then we
1559                  * know that we've already seen a peripheral matching
1560                  * expression, therefore we need to further descend the tree.
1561                  * This won't change by continuing around the loop, so we
1562                  * go ahead and return.  If we haven't seen a peripheral
1563                  * matching expression, we keep going around the loop until
1564                  * we exhaust the matching expressions.  We'll set the stop
1565                  * flag once we fall out of the loop.
1566                  */
1567                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1568                         return(retval);
1569         }
1570
1571         /*
1572          * If the return action hasn't been set to descend yet, that means
1573          * we haven't seen any peripheral matching patterns.  So tell the
1574          * caller to stop descending the tree -- the user doesn't want to
1575          * match against lower level tree elements.
1576          */
1577         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1578                 retval |= DM_RET_STOP;
1579
1580         return(retval);
1581 }
1582
1583 /*
1584  * Match a single peripheral against any number of match patterns.
1585  */
1586 static dev_match_ret
1587 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1588                struct cam_periph *periph)
1589 {
1590         dev_match_ret retval;
1591         u_int i;
1592
1593         /*
1594          * If we aren't given something to match against, that's an error.
1595          */
1596         if (periph == NULL)
1597                 return(DM_RET_ERROR);
1598
1599         /*
1600          * If there are no match entries, then this peripheral matches no
1601          * matter what.
1602          */
1603         if ((patterns == NULL) || (num_patterns == 0))
1604                 return(DM_RET_STOP | DM_RET_COPY);
1605
1606         /*
1607          * There aren't any nodes below a peripheral node, so there's no
1608          * reason to descend the tree any further.
1609          */
1610         retval = DM_RET_STOP;
1611
1612         for (i = 0; i < num_patterns; i++) {
1613                 struct periph_match_pattern *cur_pattern;
1614
1615                 /*
1616                  * If the pattern in question isn't for a peripheral, we
1617                  * aren't interested.
1618                  */
1619                 if (patterns[i].type != DEV_MATCH_PERIPH)
1620                         continue;
1621
1622                 cur_pattern = &patterns[i].pattern.periph_pattern;
1623
1624                 /*
1625                  * If they want to match on anything, then we will do so.
1626                  */
1627                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1628                         /* set the copy flag */
1629                         retval |= DM_RET_COPY;
1630
1631                         /*
1632                          * We've already set the return action to stop,
1633                          * since there are no nodes below peripherals in
1634                          * the tree.
1635                          */
1636                         return(retval);
1637                 }
1638
1639                 /*
1640                  * Not sure why someone would do this...
1641                  */
1642                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1643                         continue;
1644
1645                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1646                  && (cur_pattern->path_id != periph->path->bus->path_id))
1647                         continue;
1648
1649                 /*
1650                  * For the target and lun id's, we have to make sure the
1651                  * target and lun pointers aren't NULL.  The xpt peripheral
1652                  * has a wildcard target and device.
1653                  */
1654                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1655                  && ((periph->path->target == NULL)
1656                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1657                         continue;
1658
1659                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1660                  && ((periph->path->device == NULL)
1661                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1662                         continue;
1663
1664                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1665                  && (cur_pattern->unit_number != periph->unit_number))
1666                         continue;
1667
1668                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1669                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1670                              DEV_IDLEN) != 0))
1671                         continue;
1672
1673                 /*
1674                  * If we get to this point, the user definitely wants
1675                  * information on this peripheral.  So tell the caller to
1676                  * copy the data out.
1677                  */
1678                 retval |= DM_RET_COPY;
1679
1680                 /*
1681                  * The return action has already been set to stop, since
1682                  * peripherals don't have any nodes below them in the EDT.
1683                  */
1684                 return(retval);
1685         }
1686
1687         /*
1688          * If we get to this point, the peripheral that was passed in
1689          * doesn't match any of the patterns.
1690          */
1691         return(retval);
1692 }
1693
1694 static int
1695 xptedtbusfunc(struct cam_eb *bus, void *arg)
1696 {
1697         struct ccb_dev_match *cdm;
1698         struct cam_et *target;
1699         dev_match_ret retval;
1700
1701         cdm = (struct ccb_dev_match *)arg;
1702
1703         /*
1704          * If our position is for something deeper in the tree, that means
1705          * that we've already seen this node.  So, we keep going down.
1706          */
1707         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1708          && (cdm->pos.cookie.bus == bus)
1709          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1710          && (cdm->pos.cookie.target != NULL))
1711                 retval = DM_RET_DESCEND;
1712         else
1713                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1714
1715         /*
1716          * If we got an error, bail out of the search.
1717          */
1718         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1719                 cdm->status = CAM_DEV_MATCH_ERROR;
1720                 return(0);
1721         }
1722
1723         /*
1724          * If the copy flag is set, copy this bus out.
1725          */
1726         if (retval & DM_RET_COPY) {
1727                 int spaceleft, j;
1728
1729                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1730                         sizeof(struct dev_match_result));
1731
1732                 /*
1733                  * If we don't have enough space to put in another
1734                  * match result, save our position and tell the
1735                  * user there are more devices to check.
1736                  */
1737                 if (spaceleft < sizeof(struct dev_match_result)) {
1738                         bzero(&cdm->pos, sizeof(cdm->pos));
1739                         cdm->pos.position_type =
1740                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1741
1742                         cdm->pos.cookie.bus = bus;
1743                         cdm->pos.generations[CAM_BUS_GENERATION]=
1744                                 xsoftc.bus_generation;
1745                         cdm->status = CAM_DEV_MATCH_MORE;
1746                         return(0);
1747                 }
1748                 j = cdm->num_matches;
1749                 cdm->num_matches++;
1750                 cdm->matches[j].type = DEV_MATCH_BUS;
1751                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1752                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1753                 cdm->matches[j].result.bus_result.unit_number =
1754                         bus->sim->unit_number;
1755                 strlcpy(cdm->matches[j].result.bus_result.dev_name,
1756                         bus->sim->sim_name,
1757                         sizeof(cdm->matches[j].result.bus_result.dev_name));
1758         }
1759
1760         /*
1761          * If the user is only interested in buses, there's no
1762          * reason to descend to the next level in the tree.
1763          */
1764         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1765                 return(1);
1766
1767         /*
1768          * If there is a target generation recorded, check it to
1769          * make sure the target list hasn't changed.
1770          */
1771         mtx_lock(&bus->eb_mtx);
1772         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1773          && (cdm->pos.cookie.bus == bus)
1774          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1775          && (cdm->pos.cookie.target != NULL)) {
1776                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1777                     bus->generation)) {
1778                         mtx_unlock(&bus->eb_mtx);
1779                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1780                         return (0);
1781                 }
1782                 target = (struct cam_et *)cdm->pos.cookie.target;
1783                 target->refcount++;
1784         } else
1785                 target = NULL;
1786         mtx_unlock(&bus->eb_mtx);
1787
1788         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1789 }
1790
1791 static int
1792 xptedttargetfunc(struct cam_et *target, void *arg)
1793 {
1794         struct ccb_dev_match *cdm;
1795         struct cam_eb *bus;
1796         struct cam_ed *device;
1797
1798         cdm = (struct ccb_dev_match *)arg;
1799         bus = target->bus;
1800
1801         /*
1802          * If there is a device list generation recorded, check it to
1803          * make sure the device list hasn't changed.
1804          */
1805         mtx_lock(&bus->eb_mtx);
1806         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1807          && (cdm->pos.cookie.bus == bus)
1808          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1809          && (cdm->pos.cookie.target == target)
1810          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1811          && (cdm->pos.cookie.device != NULL)) {
1812                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1813                     target->generation) {
1814                         mtx_unlock(&bus->eb_mtx);
1815                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1816                         return(0);
1817                 }
1818                 device = (struct cam_ed *)cdm->pos.cookie.device;
1819                 device->refcount++;
1820         } else
1821                 device = NULL;
1822         mtx_unlock(&bus->eb_mtx);
1823
1824         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1825 }
1826
1827 static int
1828 xptedtdevicefunc(struct cam_ed *device, void *arg)
1829 {
1830         struct cam_eb *bus;
1831         struct cam_periph *periph;
1832         struct ccb_dev_match *cdm;
1833         dev_match_ret retval;
1834
1835         cdm = (struct ccb_dev_match *)arg;
1836         bus = device->target->bus;
1837
1838         /*
1839          * If our position is for something deeper in the tree, that means
1840          * that we've already seen this node.  So, we keep going down.
1841          */
1842         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1843          && (cdm->pos.cookie.device == device)
1844          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1845          && (cdm->pos.cookie.periph != NULL))
1846                 retval = DM_RET_DESCEND;
1847         else
1848                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1849                                         device);
1850
1851         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1852                 cdm->status = CAM_DEV_MATCH_ERROR;
1853                 return(0);
1854         }
1855
1856         /*
1857          * If the copy flag is set, copy this device out.
1858          */
1859         if (retval & DM_RET_COPY) {
1860                 int spaceleft, j;
1861
1862                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1863                         sizeof(struct dev_match_result));
1864
1865                 /*
1866                  * If we don't have enough space to put in another
1867                  * match result, save our position and tell the
1868                  * user there are more devices to check.
1869                  */
1870                 if (spaceleft < sizeof(struct dev_match_result)) {
1871                         bzero(&cdm->pos, sizeof(cdm->pos));
1872                         cdm->pos.position_type =
1873                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1874                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1875
1876                         cdm->pos.cookie.bus = device->target->bus;
1877                         cdm->pos.generations[CAM_BUS_GENERATION]=
1878                                 xsoftc.bus_generation;
1879                         cdm->pos.cookie.target = device->target;
1880                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1881                                 device->target->bus->generation;
1882                         cdm->pos.cookie.device = device;
1883                         cdm->pos.generations[CAM_DEV_GENERATION] =
1884                                 device->target->generation;
1885                         cdm->status = CAM_DEV_MATCH_MORE;
1886                         return(0);
1887                 }
1888                 j = cdm->num_matches;
1889                 cdm->num_matches++;
1890                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1891                 cdm->matches[j].result.device_result.path_id =
1892                         device->target->bus->path_id;
1893                 cdm->matches[j].result.device_result.target_id =
1894                         device->target->target_id;
1895                 cdm->matches[j].result.device_result.target_lun =
1896                         device->lun_id;
1897                 cdm->matches[j].result.device_result.protocol =
1898                         device->protocol;
1899                 bcopy(&device->inq_data,
1900                       &cdm->matches[j].result.device_result.inq_data,
1901                       sizeof(struct scsi_inquiry_data));
1902                 bcopy(&device->ident_data,
1903                       &cdm->matches[j].result.device_result.ident_data,
1904                       sizeof(struct ata_params));
1905
1906                 /* Let the user know whether this device is unconfigured */
1907                 if (device->flags & CAM_DEV_UNCONFIGURED)
1908                         cdm->matches[j].result.device_result.flags =
1909                                 DEV_RESULT_UNCONFIGURED;
1910                 else
1911                         cdm->matches[j].result.device_result.flags =
1912                                 DEV_RESULT_NOFLAG;
1913         }
1914
1915         /*
1916          * If the user isn't interested in peripherals, don't descend
1917          * the tree any further.
1918          */
1919         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1920                 return(1);
1921
1922         /*
1923          * If there is a peripheral list generation recorded, make sure
1924          * it hasn't changed.
1925          */
1926         xpt_lock_buses();
1927         mtx_lock(&bus->eb_mtx);
1928         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1929          && (cdm->pos.cookie.bus == bus)
1930          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1931          && (cdm->pos.cookie.target == device->target)
1932          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1933          && (cdm->pos.cookie.device == device)
1934          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1935          && (cdm->pos.cookie.periph != NULL)) {
1936                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1937                     device->generation) {
1938                         mtx_unlock(&bus->eb_mtx);
1939                         xpt_unlock_buses();
1940                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1941                         return(0);
1942                 }
1943                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1944                 periph->refcount++;
1945         } else
1946                 periph = NULL;
1947         mtx_unlock(&bus->eb_mtx);
1948         xpt_unlock_buses();
1949
1950         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1951 }
1952
1953 static int
1954 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1955 {
1956         struct ccb_dev_match *cdm;
1957         dev_match_ret retval;
1958
1959         cdm = (struct ccb_dev_match *)arg;
1960
1961         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1962
1963         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1964                 cdm->status = CAM_DEV_MATCH_ERROR;
1965                 return(0);
1966         }
1967
1968         /*
1969          * If the copy flag is set, copy this peripheral out.
1970          */
1971         if (retval & DM_RET_COPY) {
1972                 int spaceleft, j;
1973                 size_t l;
1974
1975                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1976                         sizeof(struct dev_match_result));
1977
1978                 /*
1979                  * If we don't have enough space to put in another
1980                  * match result, save our position and tell the
1981                  * user there are more devices to check.
1982                  */
1983                 if (spaceleft < sizeof(struct dev_match_result)) {
1984                         bzero(&cdm->pos, sizeof(cdm->pos));
1985                         cdm->pos.position_type =
1986                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1987                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1988                                 CAM_DEV_POS_PERIPH;
1989
1990                         cdm->pos.cookie.bus = periph->path->bus;
1991                         cdm->pos.generations[CAM_BUS_GENERATION]=
1992                                 xsoftc.bus_generation;
1993                         cdm->pos.cookie.target = periph->path->target;
1994                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1995                                 periph->path->bus->generation;
1996                         cdm->pos.cookie.device = periph->path->device;
1997                         cdm->pos.generations[CAM_DEV_GENERATION] =
1998                                 periph->path->target->generation;
1999                         cdm->pos.cookie.periph = periph;
2000                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2001                                 periph->path->device->generation;
2002                         cdm->status = CAM_DEV_MATCH_MORE;
2003                         return(0);
2004                 }
2005
2006                 j = cdm->num_matches;
2007                 cdm->num_matches++;
2008                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2009                 cdm->matches[j].result.periph_result.path_id =
2010                         periph->path->bus->path_id;
2011                 cdm->matches[j].result.periph_result.target_id =
2012                         periph->path->target->target_id;
2013                 cdm->matches[j].result.periph_result.target_lun =
2014                         periph->path->device->lun_id;
2015                 cdm->matches[j].result.periph_result.unit_number =
2016                         periph->unit_number;
2017                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2018                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2019                         periph->periph_name, l);
2020         }
2021
2022         return(1);
2023 }
2024
2025 static int
2026 xptedtmatch(struct ccb_dev_match *cdm)
2027 {
2028         struct cam_eb *bus;
2029         int ret;
2030
2031         cdm->num_matches = 0;
2032
2033         /*
2034          * Check the bus list generation.  If it has changed, the user
2035          * needs to reset everything and start over.
2036          */
2037         xpt_lock_buses();
2038         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2039          && (cdm->pos.cookie.bus != NULL)) {
2040                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
2041                     xsoftc.bus_generation) {
2042                         xpt_unlock_buses();
2043                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2044                         return(0);
2045                 }
2046                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
2047                 bus->refcount++;
2048         } else
2049                 bus = NULL;
2050         xpt_unlock_buses();
2051
2052         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
2053
2054         /*
2055          * If we get back 0, that means that we had to stop before fully
2056          * traversing the EDT.  It also means that one of the subroutines
2057          * has set the status field to the proper value.  If we get back 1,
2058          * we've fully traversed the EDT and copied out any matching entries.
2059          */
2060         if (ret == 1)
2061                 cdm->status = CAM_DEV_MATCH_LAST;
2062
2063         return(ret);
2064 }
2065
2066 static int
2067 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2068 {
2069         struct cam_periph *periph;
2070         struct ccb_dev_match *cdm;
2071
2072         cdm = (struct ccb_dev_match *)arg;
2073
2074         xpt_lock_buses();
2075         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2076          && (cdm->pos.cookie.pdrv == pdrv)
2077          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2078          && (cdm->pos.cookie.periph != NULL)) {
2079                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2080                     (*pdrv)->generation) {
2081                         xpt_unlock_buses();
2082                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2083                         return(0);
2084                 }
2085                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
2086                 periph->refcount++;
2087         } else
2088                 periph = NULL;
2089         xpt_unlock_buses();
2090
2091         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
2092 }
2093
2094 static int
2095 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2096 {
2097         struct ccb_dev_match *cdm;
2098         dev_match_ret retval;
2099
2100         cdm = (struct ccb_dev_match *)arg;
2101
2102         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2103
2104         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2105                 cdm->status = CAM_DEV_MATCH_ERROR;
2106                 return(0);
2107         }
2108
2109         /*
2110          * If the copy flag is set, copy this peripheral out.
2111          */
2112         if (retval & DM_RET_COPY) {
2113                 int spaceleft, j;
2114                 size_t l;
2115
2116                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2117                         sizeof(struct dev_match_result));
2118
2119                 /*
2120                  * If we don't have enough space to put in another
2121                  * match result, save our position and tell the
2122                  * user there are more devices to check.
2123                  */
2124                 if (spaceleft < sizeof(struct dev_match_result)) {
2125                         struct periph_driver **pdrv;
2126
2127                         pdrv = NULL;
2128                         bzero(&cdm->pos, sizeof(cdm->pos));
2129                         cdm->pos.position_type =
2130                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2131                                 CAM_DEV_POS_PERIPH;
2132
2133                         /*
2134                          * This may look a bit non-sensical, but it is
2135                          * actually quite logical.  There are very few
2136                          * peripheral drivers, and bloating every peripheral
2137                          * structure with a pointer back to its parent
2138                          * peripheral driver linker set entry would cost
2139                          * more in the long run than doing this quick lookup.
2140                          */
2141                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2142                                 if (strcmp((*pdrv)->driver_name,
2143                                     periph->periph_name) == 0)
2144                                         break;
2145                         }
2146
2147                         if (*pdrv == NULL) {
2148                                 cdm->status = CAM_DEV_MATCH_ERROR;
2149                                 return(0);
2150                         }
2151
2152                         cdm->pos.cookie.pdrv = pdrv;
2153                         /*
2154                          * The periph generation slot does double duty, as
2155                          * does the periph pointer slot.  They are used for
2156                          * both edt and pdrv lookups and positioning.
2157                          */
2158                         cdm->pos.cookie.periph = periph;
2159                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2160                                 (*pdrv)->generation;
2161                         cdm->status = CAM_DEV_MATCH_MORE;
2162                         return(0);
2163                 }
2164
2165                 j = cdm->num_matches;
2166                 cdm->num_matches++;
2167                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2168                 cdm->matches[j].result.periph_result.path_id =
2169                         periph->path->bus->path_id;
2170
2171                 /*
2172                  * The transport layer peripheral doesn't have a target or
2173                  * lun.
2174                  */
2175                 if (periph->path->target)
2176                         cdm->matches[j].result.periph_result.target_id =
2177                                 periph->path->target->target_id;
2178                 else
2179                         cdm->matches[j].result.periph_result.target_id =
2180                                 CAM_TARGET_WILDCARD;
2181
2182                 if (periph->path->device)
2183                         cdm->matches[j].result.periph_result.target_lun =
2184                                 periph->path->device->lun_id;
2185                 else
2186                         cdm->matches[j].result.periph_result.target_lun =
2187                                 CAM_LUN_WILDCARD;
2188
2189                 cdm->matches[j].result.periph_result.unit_number =
2190                         periph->unit_number;
2191                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2192                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2193                         periph->periph_name, l);
2194         }
2195
2196         return(1);
2197 }
2198
2199 static int
2200 xptperiphlistmatch(struct ccb_dev_match *cdm)
2201 {
2202         int ret;
2203
2204         cdm->num_matches = 0;
2205
2206         /*
2207          * At this point in the edt traversal function, we check the bus
2208          * list generation to make sure that no buses have been added or
2209          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2210          * For the peripheral driver list traversal function, however, we
2211          * don't have to worry about new peripheral driver types coming or
2212          * going; they're in a linker set, and therefore can't change
2213          * without a recompile.
2214          */
2215
2216         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2217          && (cdm->pos.cookie.pdrv != NULL))
2218                 ret = xptpdrvtraverse(
2219                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2220                                 xptplistpdrvfunc, cdm);
2221         else
2222                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2223
2224         /*
2225          * If we get back 0, that means that we had to stop before fully
2226          * traversing the peripheral driver tree.  It also means that one of
2227          * the subroutines has set the status field to the proper value.  If
2228          * we get back 1, we've fully traversed the EDT and copied out any
2229          * matching entries.
2230          */
2231         if (ret == 1)
2232                 cdm->status = CAM_DEV_MATCH_LAST;
2233
2234         return(ret);
2235 }
2236
2237 static int
2238 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2239 {
2240         struct cam_eb *bus, *next_bus;
2241         int retval;
2242
2243         retval = 1;
2244         if (start_bus)
2245                 bus = start_bus;
2246         else {
2247                 xpt_lock_buses();
2248                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2249                 if (bus == NULL) {
2250                         xpt_unlock_buses();
2251                         return (retval);
2252                 }
2253                 bus->refcount++;
2254                 xpt_unlock_buses();
2255         }
2256         for (; bus != NULL; bus = next_bus) {
2257                 retval = tr_func(bus, arg);
2258                 if (retval == 0) {
2259                         xpt_release_bus(bus);
2260                         break;
2261                 }
2262                 xpt_lock_buses();
2263                 next_bus = TAILQ_NEXT(bus, links);
2264                 if (next_bus)
2265                         next_bus->refcount++;
2266                 xpt_unlock_buses();
2267                 xpt_release_bus(bus);
2268         }
2269         return(retval);
2270 }
2271
2272 static int
2273 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2274                   xpt_targetfunc_t *tr_func, void *arg)
2275 {
2276         struct cam_et *target, *next_target;
2277         int retval;
2278
2279         retval = 1;
2280         if (start_target)
2281                 target = start_target;
2282         else {
2283                 mtx_lock(&bus->eb_mtx);
2284                 target = TAILQ_FIRST(&bus->et_entries);
2285                 if (target == NULL) {
2286                         mtx_unlock(&bus->eb_mtx);
2287                         return (retval);
2288                 }
2289                 target->refcount++;
2290                 mtx_unlock(&bus->eb_mtx);
2291         }
2292         for (; target != NULL; target = next_target) {
2293                 retval = tr_func(target, arg);
2294                 if (retval == 0) {
2295                         xpt_release_target(target);
2296                         break;
2297                 }
2298                 mtx_lock(&bus->eb_mtx);
2299                 next_target = TAILQ_NEXT(target, links);
2300                 if (next_target)
2301                         next_target->refcount++;
2302                 mtx_unlock(&bus->eb_mtx);
2303                 xpt_release_target(target);
2304         }
2305         return(retval);
2306 }
2307
2308 static int
2309 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2310                   xpt_devicefunc_t *tr_func, void *arg)
2311 {
2312         struct cam_eb *bus;
2313         struct cam_ed *device, *next_device;
2314         int retval;
2315
2316         retval = 1;
2317         bus = target->bus;
2318         if (start_device)
2319                 device = start_device;
2320         else {
2321                 mtx_lock(&bus->eb_mtx);
2322                 device = TAILQ_FIRST(&target->ed_entries);
2323                 if (device == NULL) {
2324                         mtx_unlock(&bus->eb_mtx);
2325                         return (retval);
2326                 }
2327                 device->refcount++;
2328                 mtx_unlock(&bus->eb_mtx);
2329         }
2330         for (; device != NULL; device = next_device) {
2331                 mtx_lock(&device->device_mtx);
2332                 retval = tr_func(device, arg);
2333                 mtx_unlock(&device->device_mtx);
2334                 if (retval == 0) {
2335                         xpt_release_device(device);
2336                         break;
2337                 }
2338                 mtx_lock(&bus->eb_mtx);
2339                 next_device = TAILQ_NEXT(device, links);
2340                 if (next_device)
2341                         next_device->refcount++;
2342                 mtx_unlock(&bus->eb_mtx);
2343                 xpt_release_device(device);
2344         }
2345         return(retval);
2346 }
2347
2348 static int
2349 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2350                   xpt_periphfunc_t *tr_func, void *arg)
2351 {
2352         struct cam_eb *bus;
2353         struct cam_periph *periph, *next_periph;
2354         int retval;
2355
2356         retval = 1;
2357
2358         bus = device->target->bus;
2359         if (start_periph)
2360                 periph = start_periph;
2361         else {
2362                 xpt_lock_buses();
2363                 mtx_lock(&bus->eb_mtx);
2364                 periph = SLIST_FIRST(&device->periphs);
2365                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2366                         periph = SLIST_NEXT(periph, periph_links);
2367                 if (periph == NULL) {
2368                         mtx_unlock(&bus->eb_mtx);
2369                         xpt_unlock_buses();
2370                         return (retval);
2371                 }
2372                 periph->refcount++;
2373                 mtx_unlock(&bus->eb_mtx);
2374                 xpt_unlock_buses();
2375         }
2376         for (; periph != NULL; periph = next_periph) {
2377                 retval = tr_func(periph, arg);
2378                 if (retval == 0) {
2379                         cam_periph_release_locked(periph);
2380                         break;
2381                 }
2382                 xpt_lock_buses();
2383                 mtx_lock(&bus->eb_mtx);
2384                 next_periph = SLIST_NEXT(periph, periph_links);
2385                 while (next_periph != NULL &&
2386                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2387                         next_periph = SLIST_NEXT(next_periph, periph_links);
2388                 if (next_periph)
2389                         next_periph->refcount++;
2390                 mtx_unlock(&bus->eb_mtx);
2391                 xpt_unlock_buses();
2392                 cam_periph_release_locked(periph);
2393         }
2394         return(retval);
2395 }
2396
2397 static int
2398 xptpdrvtraverse(struct periph_driver **start_pdrv,
2399                 xpt_pdrvfunc_t *tr_func, void *arg)
2400 {
2401         struct periph_driver **pdrv;
2402         int retval;
2403
2404         retval = 1;
2405
2406         /*
2407          * We don't traverse the peripheral driver list like we do the
2408          * other lists, because it is a linker set, and therefore cannot be
2409          * changed during runtime.  If the peripheral driver list is ever
2410          * re-done to be something other than a linker set (i.e. it can
2411          * change while the system is running), the list traversal should
2412          * be modified to work like the other traversal functions.
2413          */
2414         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2415              *pdrv != NULL; pdrv++) {
2416                 retval = tr_func(pdrv, arg);
2417
2418                 if (retval == 0)
2419                         return(retval);
2420         }
2421
2422         return(retval);
2423 }
2424
2425 static int
2426 xptpdperiphtraverse(struct periph_driver **pdrv,
2427                     struct cam_periph *start_periph,
2428                     xpt_periphfunc_t *tr_func, void *arg)
2429 {
2430         struct cam_periph *periph, *next_periph;
2431         int retval;
2432
2433         retval = 1;
2434
2435         if (start_periph)
2436                 periph = start_periph;
2437         else {
2438                 xpt_lock_buses();
2439                 periph = TAILQ_FIRST(&(*pdrv)->units);
2440                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2441                         periph = TAILQ_NEXT(periph, unit_links);
2442                 if (periph == NULL) {
2443                         xpt_unlock_buses();
2444                         return (retval);
2445                 }
2446                 periph->refcount++;
2447                 xpt_unlock_buses();
2448         }
2449         for (; periph != NULL; periph = next_periph) {
2450                 cam_periph_lock(periph);
2451                 retval = tr_func(periph, arg);
2452                 cam_periph_unlock(periph);
2453                 if (retval == 0) {
2454                         cam_periph_release(periph);
2455                         break;
2456                 }
2457                 xpt_lock_buses();
2458                 next_periph = TAILQ_NEXT(periph, unit_links);
2459                 while (next_periph != NULL &&
2460                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2461                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2462                 if (next_periph)
2463                         next_periph->refcount++;
2464                 xpt_unlock_buses();
2465                 cam_periph_release(periph);
2466         }
2467         return(retval);
2468 }
2469
2470 static int
2471 xptdefbusfunc(struct cam_eb *bus, void *arg)
2472 {
2473         struct xpt_traverse_config *tr_config;
2474
2475         tr_config = (struct xpt_traverse_config *)arg;
2476
2477         if (tr_config->depth == XPT_DEPTH_BUS) {
2478                 xpt_busfunc_t *tr_func;
2479
2480                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2481
2482                 return(tr_func(bus, tr_config->tr_arg));
2483         } else
2484                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2485 }
2486
2487 static int
2488 xptdeftargetfunc(struct cam_et *target, void *arg)
2489 {
2490         struct xpt_traverse_config *tr_config;
2491
2492         tr_config = (struct xpt_traverse_config *)arg;
2493
2494         if (tr_config->depth == XPT_DEPTH_TARGET) {
2495                 xpt_targetfunc_t *tr_func;
2496
2497                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2498
2499                 return(tr_func(target, tr_config->tr_arg));
2500         } else
2501                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2502 }
2503
2504 static int
2505 xptdefdevicefunc(struct cam_ed *device, void *arg)
2506 {
2507         struct xpt_traverse_config *tr_config;
2508
2509         tr_config = (struct xpt_traverse_config *)arg;
2510
2511         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2512                 xpt_devicefunc_t *tr_func;
2513
2514                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2515
2516                 return(tr_func(device, tr_config->tr_arg));
2517         } else
2518                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2519 }
2520
2521 static int
2522 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2523 {
2524         struct xpt_traverse_config *tr_config;
2525         xpt_periphfunc_t *tr_func;
2526
2527         tr_config = (struct xpt_traverse_config *)arg;
2528
2529         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2530
2531         /*
2532          * Unlike the other default functions, we don't check for depth
2533          * here.  The peripheral driver level is the last level in the EDT,
2534          * so if we're here, we should execute the function in question.
2535          */
2536         return(tr_func(periph, tr_config->tr_arg));
2537 }
2538
2539 /*
2540  * Execute the given function for every bus in the EDT.
2541  */
2542 static int
2543 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2544 {
2545         struct xpt_traverse_config tr_config;
2546
2547         tr_config.depth = XPT_DEPTH_BUS;
2548         tr_config.tr_func = tr_func;
2549         tr_config.tr_arg = arg;
2550
2551         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2552 }
2553
2554 /*
2555  * Execute the given function for every device in the EDT.
2556  */
2557 static int
2558 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2559 {
2560         struct xpt_traverse_config tr_config;
2561
2562         tr_config.depth = XPT_DEPTH_DEVICE;
2563         tr_config.tr_func = tr_func;
2564         tr_config.tr_arg = arg;
2565
2566         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2567 }
2568
2569 static int
2570 xptsetasyncfunc(struct cam_ed *device, void *arg)
2571 {
2572         struct cam_path path;
2573         struct ccb_getdev cgd;
2574         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2575
2576         /*
2577          * Don't report unconfigured devices (Wildcard devs,
2578          * devices only for target mode, device instances
2579          * that have been invalidated but are waiting for
2580          * their last reference count to be released).
2581          */
2582         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2583                 return (1);
2584
2585         xpt_compile_path(&path,
2586                          NULL,
2587                          device->target->bus->path_id,
2588                          device->target->target_id,
2589                          device->lun_id);
2590         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2591         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2592         xpt_action((union ccb *)&cgd);
2593         csa->callback(csa->callback_arg,
2594                             AC_FOUND_DEVICE,
2595                             &path, &cgd);
2596         xpt_release_path(&path);
2597
2598         return(1);
2599 }
2600
2601 static int
2602 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2603 {
2604         struct cam_path path;
2605         struct ccb_pathinq cpi;
2606         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2607
2608         xpt_compile_path(&path, /*periph*/NULL,
2609                          bus->path_id,
2610                          CAM_TARGET_WILDCARD,
2611                          CAM_LUN_WILDCARD);
2612         xpt_path_lock(&path);
2613         xpt_path_inq(&cpi, &path);
2614         csa->callback(csa->callback_arg,
2615                             AC_PATH_REGISTERED,
2616                             &path, &cpi);
2617         xpt_path_unlock(&path);
2618         xpt_release_path(&path);
2619
2620         return(1);
2621 }
2622
2623 void
2624 xpt_action(union ccb *start_ccb)
2625 {
2626
2627         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2628             ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2629                 xpt_action_name(start_ccb->ccb_h.func_code)));
2630
2631         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2632         (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb);
2633 }
2634
2635 void
2636 xpt_action_default(union ccb *start_ccb)
2637 {
2638         struct cam_path *path;
2639         struct cam_sim *sim;
2640         struct mtx *mtx;
2641
2642         path = start_ccb->ccb_h.path;
2643         CAM_DEBUG(path, CAM_DEBUG_TRACE,
2644             ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2645                 xpt_action_name(start_ccb->ccb_h.func_code)));
2646
2647         switch (start_ccb->ccb_h.func_code) {
2648         case XPT_SCSI_IO:
2649         {
2650                 struct cam_ed *device;
2651
2652                 /*
2653                  * For the sake of compatibility with SCSI-1
2654                  * devices that may not understand the identify
2655                  * message, we include lun information in the
2656                  * second byte of all commands.  SCSI-1 specifies
2657                  * that luns are a 3 bit value and reserves only 3
2658                  * bits for lun information in the CDB.  Later
2659                  * revisions of the SCSI spec allow for more than 8
2660                  * luns, but have deprecated lun information in the
2661                  * CDB.  So, if the lun won't fit, we must omit.
2662                  *
2663                  * Also be aware that during initial probing for devices,
2664                  * the inquiry information is unknown but initialized to 0.
2665                  * This means that this code will be exercised while probing
2666                  * devices with an ANSI revision greater than 2.
2667                  */
2668                 device = path->device;
2669                 if (device->protocol_version <= SCSI_REV_2
2670                  && start_ccb->ccb_h.target_lun < 8
2671                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2672
2673                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2674                             start_ccb->ccb_h.target_lun << 5;
2675                 }
2676                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2677         }
2678         /* FALLTHROUGH */
2679         case XPT_TARGET_IO:
2680         case XPT_CONT_TARGET_IO:
2681                 start_ccb->csio.sense_resid = 0;
2682                 start_ccb->csio.resid = 0;
2683                 /* FALLTHROUGH */
2684         case XPT_ATA_IO:
2685                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2686                         start_ccb->ataio.resid = 0;
2687                 /* FALLTHROUGH */
2688         case XPT_NVME_IO:
2689                 /* FALLTHROUGH */
2690         case XPT_NVME_ADMIN:
2691                 /* FALLTHROUGH */
2692         case XPT_MMC_IO:
2693                 /* XXX just like nmve_io? */
2694         case XPT_RESET_DEV:
2695         case XPT_ENG_EXEC:
2696         case XPT_SMP_IO:
2697         {
2698                 struct cam_devq *devq;
2699
2700                 devq = path->bus->sim->devq;
2701                 mtx_lock(&devq->send_mtx);
2702                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2703                 if (xpt_schedule_devq(devq, path->device) != 0)
2704                         xpt_run_devq(devq);
2705                 mtx_unlock(&devq->send_mtx);
2706                 break;
2707         }
2708         case XPT_CALC_GEOMETRY:
2709                 /* Filter out garbage */
2710                 if (start_ccb->ccg.block_size == 0
2711                  || start_ccb->ccg.volume_size == 0) {
2712                         start_ccb->ccg.cylinders = 0;
2713                         start_ccb->ccg.heads = 0;
2714                         start_ccb->ccg.secs_per_track = 0;
2715                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2716                         break;
2717                 }
2718                 goto call_sim;
2719         case XPT_ABORT:
2720         {
2721                 union ccb* abort_ccb;
2722
2723                 abort_ccb = start_ccb->cab.abort_ccb;
2724                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2725                         struct cam_ed *device;
2726                         struct cam_devq *devq;
2727
2728                         device = abort_ccb->ccb_h.path->device;
2729                         devq = device->sim->devq;
2730
2731                         mtx_lock(&devq->send_mtx);
2732                         if (abort_ccb->ccb_h.pinfo.index > 0) {
2733                                 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb);
2734                                 abort_ccb->ccb_h.status =
2735                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2736                                 xpt_freeze_devq_device(device, 1);
2737                                 mtx_unlock(&devq->send_mtx);
2738                                 xpt_done(abort_ccb);
2739                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2740                                 break;
2741                         }
2742                         mtx_unlock(&devq->send_mtx);
2743
2744                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2745                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2746                                 /*
2747                                  * We've caught this ccb en route to
2748                                  * the SIM.  Flag it for abort and the
2749                                  * SIM will do so just before starting
2750                                  * real work on the CCB.
2751                                  */
2752                                 abort_ccb->ccb_h.status =
2753                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2754                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2755                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2756                                 break;
2757                         }
2758                 }
2759                 if (XPT_FC_IS_QUEUED(abort_ccb)
2760                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2761                         /*
2762                          * It's already completed but waiting
2763                          * for our SWI to get to it.
2764                          */
2765                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2766                         break;
2767                 }
2768                 /*
2769                  * If we weren't able to take care of the abort request
2770                  * in the XPT, pass the request down to the SIM for processing.
2771                  */
2772         }
2773         /* FALLTHROUGH */
2774         case XPT_ACCEPT_TARGET_IO:
2775         case XPT_EN_LUN:
2776         case XPT_IMMED_NOTIFY:
2777         case XPT_NOTIFY_ACK:
2778         case XPT_RESET_BUS:
2779         case XPT_IMMEDIATE_NOTIFY:
2780         case XPT_NOTIFY_ACKNOWLEDGE:
2781         case XPT_GET_SIM_KNOB_OLD:
2782         case XPT_GET_SIM_KNOB:
2783         case XPT_SET_SIM_KNOB:
2784         case XPT_GET_TRAN_SETTINGS:
2785         case XPT_SET_TRAN_SETTINGS:
2786         case XPT_PATH_INQ:
2787 call_sim:
2788                 sim = path->bus->sim;
2789                 mtx = sim->mtx;
2790                 if (mtx && !mtx_owned(mtx))
2791                         mtx_lock(mtx);
2792                 else
2793                         mtx = NULL;
2794
2795                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2796                     ("Calling sim->sim_action(): func=%#x\n", start_ccb->ccb_h.func_code));
2797                 (*(sim->sim_action))(sim, start_ccb);
2798                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2799                     ("sim->sim_action returned: status=%#x\n", start_ccb->ccb_h.status));
2800                 if (mtx)
2801                         mtx_unlock(mtx);
2802                 break;
2803         case XPT_PATH_STATS:
2804                 start_ccb->cpis.last_reset = path->bus->last_reset;
2805                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2806                 break;
2807         case XPT_GDEV_TYPE:
2808         {
2809                 struct cam_ed *dev;
2810
2811                 dev = path->device;
2812                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2813                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2814                 } else {
2815                         struct ccb_getdev *cgd;
2816
2817                         cgd = &start_ccb->cgd;
2818                         cgd->protocol = dev->protocol;
2819                         cgd->inq_data = dev->inq_data;
2820                         cgd->ident_data = dev->ident_data;
2821                         cgd->inq_flags = dev->inq_flags;
2822                         cgd->ccb_h.status = CAM_REQ_CMP;
2823                         cgd->serial_num_len = dev->serial_num_len;
2824                         if ((dev->serial_num_len > 0)
2825                          && (dev->serial_num != NULL))
2826                                 bcopy(dev->serial_num, cgd->serial_num,
2827                                       dev->serial_num_len);
2828                 }
2829                 break;
2830         }
2831         case XPT_GDEV_STATS:
2832         {
2833                 struct ccb_getdevstats *cgds = &start_ccb->cgds;
2834                 struct cam_ed *dev = path->device;
2835                 struct cam_eb *bus = path->bus;
2836                 struct cam_et *tar = path->target;
2837                 struct cam_devq *devq = bus->sim->devq;
2838
2839                 mtx_lock(&devq->send_mtx);
2840                 cgds->dev_openings = dev->ccbq.dev_openings;
2841                 cgds->dev_active = dev->ccbq.dev_active;
2842                 cgds->allocated = dev->ccbq.allocated;
2843                 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2844                 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued;
2845                 cgds->last_reset = tar->last_reset;
2846                 cgds->maxtags = dev->maxtags;
2847                 cgds->mintags = dev->mintags;
2848                 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2849                         cgds->last_reset = bus->last_reset;
2850                 mtx_unlock(&devq->send_mtx);
2851                 cgds->ccb_h.status = CAM_REQ_CMP;
2852                 break;
2853         }
2854         case XPT_GDEVLIST:
2855         {
2856                 struct cam_periph       *nperiph;
2857                 struct periph_list      *periph_head;
2858                 struct ccb_getdevlist   *cgdl;
2859                 u_int                   i;
2860                 struct cam_ed           *device;
2861                 int                     found;
2862
2863
2864                 found = 0;
2865
2866                 /*
2867                  * Don't want anyone mucking with our data.
2868                  */
2869                 device = path->device;
2870                 periph_head = &device->periphs;
2871                 cgdl = &start_ccb->cgdl;
2872
2873                 /*
2874                  * Check and see if the list has changed since the user
2875                  * last requested a list member.  If so, tell them that the
2876                  * list has changed, and therefore they need to start over
2877                  * from the beginning.
2878                  */
2879                 if ((cgdl->index != 0) &&
2880                     (cgdl->generation != device->generation)) {
2881                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2882                         break;
2883                 }
2884
2885                 /*
2886                  * Traverse the list of peripherals and attempt to find
2887                  * the requested peripheral.
2888                  */
2889                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2890                      (nperiph != NULL) && (i <= cgdl->index);
2891                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2892                         if (i == cgdl->index) {
2893                                 strlcpy(cgdl->periph_name,
2894                                         nperiph->periph_name,
2895                                         sizeof(cgdl->periph_name));
2896                                 cgdl->unit_number = nperiph->unit_number;
2897                                 found = 1;
2898                         }
2899                 }
2900                 if (found == 0) {
2901                         cgdl->status = CAM_GDEVLIST_ERROR;
2902                         break;
2903                 }
2904
2905                 if (nperiph == NULL)
2906                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2907                 else
2908                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2909
2910                 cgdl->index++;
2911                 cgdl->generation = device->generation;
2912
2913                 cgdl->ccb_h.status = CAM_REQ_CMP;
2914                 break;
2915         }
2916         case XPT_DEV_MATCH:
2917         {
2918                 dev_pos_type position_type;
2919                 struct ccb_dev_match *cdm;
2920
2921                 cdm = &start_ccb->cdm;
2922
2923                 /*
2924                  * There are two ways of getting at information in the EDT.
2925                  * The first way is via the primary EDT tree.  It starts
2926                  * with a list of buses, then a list of targets on a bus,
2927                  * then devices/luns on a target, and then peripherals on a
2928                  * device/lun.  The "other" way is by the peripheral driver
2929                  * lists.  The peripheral driver lists are organized by
2930                  * peripheral driver.  (obviously)  So it makes sense to
2931                  * use the peripheral driver list if the user is looking
2932                  * for something like "da1", or all "da" devices.  If the
2933                  * user is looking for something on a particular bus/target
2934                  * or lun, it's generally better to go through the EDT tree.
2935                  */
2936
2937                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2938                         position_type = cdm->pos.position_type;
2939                 else {
2940                         u_int i;
2941
2942                         position_type = CAM_DEV_POS_NONE;
2943
2944                         for (i = 0; i < cdm->num_patterns; i++) {
2945                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2946                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2947                                         position_type = CAM_DEV_POS_EDT;
2948                                         break;
2949                                 }
2950                         }
2951
2952                         if (cdm->num_patterns == 0)
2953                                 position_type = CAM_DEV_POS_EDT;
2954                         else if (position_type == CAM_DEV_POS_NONE)
2955                                 position_type = CAM_DEV_POS_PDRV;
2956                 }
2957
2958                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2959                 case CAM_DEV_POS_EDT:
2960                         xptedtmatch(cdm);
2961                         break;
2962                 case CAM_DEV_POS_PDRV:
2963                         xptperiphlistmatch(cdm);
2964                         break;
2965                 default:
2966                         cdm->status = CAM_DEV_MATCH_ERROR;
2967                         break;
2968                 }
2969
2970                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2971                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2972                 else
2973                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2974
2975                 break;
2976         }
2977         case XPT_SASYNC_CB:
2978         {
2979                 struct ccb_setasync *csa;
2980                 struct async_node *cur_entry;
2981                 struct async_list *async_head;
2982                 u_int32_t added;
2983
2984                 csa = &start_ccb->csa;
2985                 added = csa->event_enable;
2986                 async_head = &path->device->asyncs;
2987
2988                 /*
2989                  * If there is already an entry for us, simply
2990                  * update it.
2991                  */
2992                 cur_entry = SLIST_FIRST(async_head);
2993                 while (cur_entry != NULL) {
2994                         if ((cur_entry->callback_arg == csa->callback_arg)
2995                          && (cur_entry->callback == csa->callback))
2996                                 break;
2997                         cur_entry = SLIST_NEXT(cur_entry, links);
2998                 }
2999
3000                 if (cur_entry != NULL) {
3001                         /*
3002                          * If the request has no flags set,
3003                          * remove the entry.
3004                          */
3005                         added &= ~cur_entry->event_enable;
3006                         if (csa->event_enable == 0) {
3007                                 SLIST_REMOVE(async_head, cur_entry,
3008                                              async_node, links);
3009                                 xpt_release_device(path->device);
3010                                 free(cur_entry, M_CAMXPT);
3011                         } else {
3012                                 cur_entry->event_enable = csa->event_enable;
3013                         }
3014                         csa->event_enable = added;
3015                 } else {
3016                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3017                                            M_NOWAIT);
3018                         if (cur_entry == NULL) {
3019                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3020                                 break;
3021                         }
3022                         cur_entry->event_enable = csa->event_enable;
3023                         cur_entry->event_lock = (path->bus->sim->mtx &&
3024                             mtx_owned(path->bus->sim->mtx)) ? 1 : 0;
3025                         cur_entry->callback_arg = csa->callback_arg;
3026                         cur_entry->callback = csa->callback;
3027                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3028                         xpt_acquire_device(path->device);
3029                 }
3030                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3031                 break;
3032         }
3033         case XPT_REL_SIMQ:
3034         {
3035                 struct ccb_relsim *crs;
3036                 struct cam_ed *dev;
3037
3038                 crs = &start_ccb->crs;
3039                 dev = path->device;
3040                 if (dev == NULL) {
3041
3042                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3043                         break;
3044                 }
3045
3046                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3047
3048                         /* Don't ever go below one opening */
3049                         if (crs->openings > 0) {
3050                                 xpt_dev_ccbq_resize(path, crs->openings);
3051                                 if (bootverbose) {
3052                                         xpt_print(path,
3053                                             "number of openings is now %d\n",
3054                                             crs->openings);
3055                                 }
3056                         }
3057                 }
3058
3059                 mtx_lock(&dev->sim->devq->send_mtx);
3060                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3061
3062                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3063
3064                                 /*
3065                                  * Just extend the old timeout and decrement
3066                                  * the freeze count so that a single timeout
3067                                  * is sufficient for releasing the queue.
3068                                  */
3069                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3070                                 callout_stop(&dev->callout);
3071                         } else {
3072
3073                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3074                         }
3075
3076                         callout_reset_sbt(&dev->callout,
3077                             SBT_1MS * crs->release_timeout, 0,
3078                             xpt_release_devq_timeout, dev, 0);
3079
3080                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3081
3082                 }
3083
3084                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3085
3086                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3087                                 /*
3088                                  * Decrement the freeze count so that a single
3089                                  * completion is still sufficient to unfreeze
3090                                  * the queue.
3091                                  */
3092                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3093                         } else {
3094
3095                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3096                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3097                         }
3098                 }
3099
3100                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3101
3102                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3103                          || (dev->ccbq.dev_active == 0)) {
3104
3105                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3106                         } else {
3107
3108                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3109                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3110                         }
3111                 }
3112                 mtx_unlock(&dev->sim->devq->send_mtx);
3113
3114                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3115                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3116                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3117                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3118                 break;
3119         }
3120         case XPT_DEBUG: {
3121                 struct cam_path *oldpath;
3122
3123                 /* Check that all request bits are supported. */
3124                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3125                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3126                         break;
3127                 }
3128
3129                 cam_dflags = CAM_DEBUG_NONE;
3130                 if (cam_dpath != NULL) {
3131                         oldpath = cam_dpath;
3132                         cam_dpath = NULL;
3133                         xpt_free_path(oldpath);
3134                 }
3135                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3136                         if (xpt_create_path(&cam_dpath, NULL,
3137                                             start_ccb->ccb_h.path_id,
3138                                             start_ccb->ccb_h.target_id,
3139                                             start_ccb->ccb_h.target_lun) !=
3140                                             CAM_REQ_CMP) {
3141                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3142                         } else {
3143                                 cam_dflags = start_ccb->cdbg.flags;
3144                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3145                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3146                                     cam_dflags);
3147                         }
3148                 } else
3149                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3150                 break;
3151         }
3152         case XPT_NOOP:
3153                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3154                         xpt_freeze_devq(path, 1);
3155                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3156                 break;
3157         case XPT_REPROBE_LUN:
3158                 xpt_async(AC_INQ_CHANGED, path, NULL);
3159                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3160                 xpt_done(start_ccb);
3161                 break;
3162         default:
3163         case XPT_SDEV_TYPE:
3164         case XPT_TERM_IO:
3165         case XPT_ENG_INQ:
3166                 /* XXX Implement */
3167                 xpt_print(start_ccb->ccb_h.path,
3168                     "%s: CCB type %#x %s not supported\n", __func__,
3169                     start_ccb->ccb_h.func_code,
3170                     xpt_action_name(start_ccb->ccb_h.func_code));
3171                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3172                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3173                         xpt_done(start_ccb);
3174                 }
3175                 break;
3176         }
3177         CAM_DEBUG(path, CAM_DEBUG_TRACE,
3178             ("xpt_action_default: func= %#x %s status %#x\n",
3179                 start_ccb->ccb_h.func_code,
3180                 xpt_action_name(start_ccb->ccb_h.func_code),
3181                 start_ccb->ccb_h.status));
3182 }
3183
3184 /*
3185  * Call the sim poll routine to allow the sim to complete
3186  * any inflight requests, then call camisr_runqueue to
3187  * complete any CCB that the polling completed.
3188  */
3189 void
3190 xpt_sim_poll(struct cam_sim *sim)
3191 {
3192         struct mtx *mtx;
3193
3194         mtx = sim->mtx;
3195         if (mtx)
3196                 mtx_lock(mtx);
3197         (*(sim->sim_poll))(sim);
3198         if (mtx)
3199                 mtx_unlock(mtx);
3200         camisr_runqueue();
3201 }
3202
3203 uint32_t
3204 xpt_poll_setup(union ccb *start_ccb)
3205 {
3206         u_int32_t timeout;
3207         struct    cam_sim *sim;
3208         struct    cam_devq *devq;
3209         struct    cam_ed *dev;
3210
3211         timeout = start_ccb->ccb_h.timeout * 10;
3212         sim = start_ccb->ccb_h.path->bus->sim;
3213         devq = sim->devq;
3214         dev = start_ccb->ccb_h.path->device;
3215
3216         /*
3217          * Steal an opening so that no other queued requests
3218          * can get it before us while we simulate interrupts.
3219          */
3220         mtx_lock(&devq->send_mtx);
3221         dev->ccbq.dev_openings--;
3222         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3223             (--timeout > 0)) {
3224                 mtx_unlock(&devq->send_mtx);
3225                 DELAY(100);
3226                 xpt_sim_poll(sim);
3227                 mtx_lock(&devq->send_mtx);
3228         }
3229         dev->ccbq.dev_openings++;
3230         mtx_unlock(&devq->send_mtx);
3231
3232         return (timeout);
3233 }
3234
3235 void
3236 xpt_pollwait(union ccb *start_ccb, uint32_t timeout)
3237 {
3238
3239         while (--timeout > 0) {
3240                 xpt_sim_poll(start_ccb->ccb_h.path->bus->sim);
3241                 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3242                     != CAM_REQ_INPROG)
3243                         break;
3244                 DELAY(100);
3245         }
3246
3247         if (timeout == 0) {
3248                 /*
3249                  * XXX Is it worth adding a sim_timeout entry
3250                  * point so we can attempt recovery?  If
3251                  * this is only used for dumps, I don't think
3252                  * it is.
3253                  */
3254                 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3255         }
3256 }
3257
3258 void
3259 xpt_polled_action(union ccb *start_ccb)
3260 {
3261         uint32_t        timeout;
3262         struct cam_ed   *dev;
3263
3264         timeout = start_ccb->ccb_h.timeout * 10;
3265         dev = start_ccb->ccb_h.path->device;
3266
3267         mtx_unlock(&dev->device_mtx);
3268
3269         timeout = xpt_poll_setup(start_ccb);
3270         if (timeout > 0) {
3271                 xpt_action(start_ccb);
3272                 xpt_pollwait(start_ccb, timeout);
3273         } else {
3274                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3275         }
3276
3277         mtx_lock(&dev->device_mtx);
3278 }
3279
3280 /*
3281  * Schedule a peripheral driver to receive a ccb when its
3282  * target device has space for more transactions.
3283  */
3284 void
3285 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3286 {
3287
3288         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3289         cam_periph_assert(periph, MA_OWNED);
3290         if (new_priority < periph->scheduled_priority) {
3291                 periph->scheduled_priority = new_priority;
3292                 xpt_run_allocq(periph, 0);
3293         }
3294 }
3295
3296
3297 /*
3298  * Schedule a device to run on a given queue.
3299  * If the device was inserted as a new entry on the queue,
3300  * return 1 meaning the device queue should be run. If we
3301  * were already queued, implying someone else has already
3302  * started the queue, return 0 so the caller doesn't attempt
3303  * to run the queue.
3304  */
3305 static int
3306 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3307                  u_int32_t new_priority)
3308 {
3309         int retval;
3310         u_int32_t old_priority;
3311
3312         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3313
3314
3315         old_priority = pinfo->priority;
3316
3317         /*
3318          * Are we already queued?
3319          */
3320         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3321                 /* Simply reorder based on new priority */
3322                 if (new_priority < old_priority) {
3323                         camq_change_priority(queue, pinfo->index,
3324                                              new_priority);
3325                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3326                                         ("changed priority to %d\n",
3327                                          new_priority));
3328                         retval = 1;
3329                 } else
3330                         retval = 0;
3331         } else {
3332                 /* New entry on the queue */
3333                 if (new_priority < old_priority)
3334                         pinfo->priority = new_priority;
3335
3336                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3337                                 ("Inserting onto queue\n"));
3338                 pinfo->generation = ++queue->generation;
3339                 camq_insert(queue, pinfo);
3340                 retval = 1;
3341         }
3342         return (retval);
3343 }
3344
3345 static void
3346 xpt_run_allocq_task(void *context, int pending)
3347 {
3348         struct cam_periph *periph = context;
3349
3350         cam_periph_lock(periph);
3351         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3352         xpt_run_allocq(periph, 1);
3353         cam_periph_unlock(periph);
3354         cam_periph_release(periph);
3355 }
3356
3357 static void
3358 xpt_run_allocq(struct cam_periph *periph, int sleep)
3359 {
3360         struct cam_ed   *device;
3361         union ccb       *ccb;
3362         uint32_t         prio;
3363
3364         cam_periph_assert(periph, MA_OWNED);
3365         if (periph->periph_allocating)
3366                 return;
3367         cam_periph_doacquire(periph);
3368         periph->periph_allocating = 1;
3369         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3370         device = periph->path->device;
3371         ccb = NULL;
3372 restart:
3373         while ((prio = min(periph->scheduled_priority,
3374             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3375             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3376              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3377
3378                 if (ccb == NULL &&
3379                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3380                         if (sleep) {
3381                                 ccb = xpt_get_ccb(periph);
3382                                 goto restart;
3383                         }
3384                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3385                                 break;
3386                         cam_periph_doacquire(periph);
3387                         periph->flags |= CAM_PERIPH_RUN_TASK;
3388                         taskqueue_enqueue(xsoftc.xpt_taskq,
3389                             &periph->periph_run_task);
3390                         break;
3391                 }
3392                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3393                 if (prio == periph->immediate_priority) {
3394                         periph->immediate_priority = CAM_PRIORITY_NONE;
3395                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3396                                         ("waking cam_periph_getccb()\n"));
3397                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3398                                           periph_links.sle);
3399                         wakeup(&periph->ccb_list);
3400                 } else {
3401                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3402                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3403                                         ("calling periph_start()\n"));
3404                         periph->periph_start(periph, ccb);
3405                 }
3406                 ccb = NULL;
3407         }
3408         if (ccb != NULL)
3409                 xpt_release_ccb(ccb);
3410         periph->periph_allocating = 0;
3411         cam_periph_release_locked(periph);
3412 }
3413
3414 static void
3415 xpt_run_devq(struct cam_devq *devq)
3416 {
3417         struct mtx *mtx;
3418
3419         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3420
3421         devq->send_queue.qfrozen_cnt++;
3422         while ((devq->send_queue.entries > 0)
3423             && (devq->send_openings > 0)
3424             && (devq->send_queue.qfrozen_cnt <= 1)) {
3425                 struct  cam_ed *device;
3426                 union ccb *work_ccb;
3427                 struct  cam_sim *sim;
3428                 struct xpt_proto *proto;
3429
3430                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3431                                                            CAMQ_HEAD);
3432                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3433                                 ("running device %p\n", device));
3434
3435                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3436                 if (work_ccb == NULL) {
3437                         printf("device on run queue with no ccbs???\n");
3438                         continue;
3439                 }
3440
3441                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3442
3443                         mtx_lock(&xsoftc.xpt_highpower_lock);
3444                         if (xsoftc.num_highpower <= 0) {
3445                                 /*
3446                                  * We got a high power command, but we
3447                                  * don't have any available slots.  Freeze
3448                                  * the device queue until we have a slot
3449                                  * available.
3450                                  */
3451                                 xpt_freeze_devq_device(device, 1);
3452                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3453                                                    highpowerq_entry);
3454
3455                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3456                                 continue;
3457                         } else {
3458                                 /*
3459                                  * Consume a high power slot while
3460                                  * this ccb runs.
3461                                  */
3462                                 xsoftc.num_highpower--;
3463                         }
3464                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3465                 }
3466                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3467                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3468                 devq->send_openings--;
3469                 devq->send_active++;
3470                 xpt_schedule_devq(devq, device);
3471                 mtx_unlock(&devq->send_mtx);
3472
3473                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3474                         /*
3475                          * The client wants to freeze the queue
3476                          * after this CCB is sent.
3477                          */
3478                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3479                 }
3480
3481                 /* In Target mode, the peripheral driver knows best... */
3482                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3483                         if ((device->inq_flags & SID_CmdQue) != 0
3484                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3485                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3486                         else
3487                                 /*
3488                                  * Clear this in case of a retried CCB that
3489                                  * failed due to a rejected tag.
3490                                  */
3491                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3492                 }
3493
3494                 KASSERT(device == work_ccb->ccb_h.path->device,
3495                     ("device (%p) / path->device (%p) mismatch",
3496                         device, work_ccb->ccb_h.path->device));
3497                 proto = xpt_proto_find(device->protocol);
3498                 if (proto && proto->ops->debug_out)
3499                         proto->ops->debug_out(work_ccb);
3500
3501                 /*
3502                  * Device queues can be shared among multiple SIM instances
3503                  * that reside on different buses.  Use the SIM from the
3504                  * queued device, rather than the one from the calling bus.
3505                  */
3506                 sim = device->sim;
3507                 mtx = sim->mtx;
3508                 if (mtx && !mtx_owned(mtx))
3509                         mtx_lock(mtx);
3510                 else
3511                         mtx = NULL;
3512                 work_ccb->ccb_h.qos.periph_data = cam_iosched_now();
3513                 (*(sim->sim_action))(sim, work_ccb);
3514                 if (mtx)
3515                         mtx_unlock(mtx);
3516                 mtx_lock(&devq->send_mtx);
3517         }
3518         devq->send_queue.qfrozen_cnt--;
3519 }
3520
3521 /*
3522  * This function merges stuff from the slave ccb into the master ccb, while
3523  * keeping important fields in the master ccb constant.
3524  */
3525 void
3526 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3527 {
3528
3529         /*
3530          * Pull fields that are valid for peripheral drivers to set
3531          * into the master CCB along with the CCB "payload".
3532          */
3533         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3534         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3535         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3536         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3537         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3538               sizeof(union ccb) - sizeof(struct ccb_hdr));
3539 }
3540
3541 void
3542 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3543                     u_int32_t priority, u_int32_t flags)
3544 {
3545
3546         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3547         ccb_h->pinfo.priority = priority;
3548         ccb_h->path = path;
3549         ccb_h->path_id = path->bus->path_id;
3550         if (path->target)
3551                 ccb_h->target_id = path->target->target_id;
3552         else
3553                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3554         if (path->device) {
3555                 ccb_h->target_lun = path->device->lun_id;
3556                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3557         } else {
3558                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3559         }
3560         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3561         ccb_h->flags = flags;
3562         ccb_h->xflags = 0;
3563 }
3564
3565 void
3566 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3567 {
3568         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3569 }
3570
3571 /* Path manipulation functions */
3572 cam_status
3573 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3574                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3575 {
3576         struct     cam_path *path;
3577         cam_status status;
3578
3579         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3580
3581         if (path == NULL) {
3582                 status = CAM_RESRC_UNAVAIL;
3583                 return(status);
3584         }
3585         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3586         if (status != CAM_REQ_CMP) {
3587                 free(path, M_CAMPATH);
3588                 path = NULL;
3589         }
3590         *new_path_ptr = path;
3591         return (status);
3592 }
3593
3594 cam_status
3595 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3596                          struct cam_periph *periph, path_id_t path_id,
3597                          target_id_t target_id, lun_id_t lun_id)
3598 {
3599
3600         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3601             lun_id));
3602 }
3603
3604 cam_status
3605 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3606                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3607 {
3608         struct       cam_eb *bus;
3609         struct       cam_et *target;
3610         struct       cam_ed *device;
3611         cam_status   status;
3612
3613         status = CAM_REQ_CMP;   /* Completed without error */
3614         target = NULL;          /* Wildcarded */
3615         device = NULL;          /* Wildcarded */
3616
3617         /*
3618          * We will potentially modify the EDT, so block interrupts
3619          * that may attempt to create cam paths.
3620          */
3621         bus = xpt_find_bus(path_id);
3622         if (bus == NULL) {
3623                 status = CAM_PATH_INVALID;
3624         } else {
3625                 xpt_lock_buses();
3626                 mtx_lock(&bus->eb_mtx);
3627                 target = xpt_find_target(bus, target_id);
3628                 if (target == NULL) {
3629                         /* Create one */
3630                         struct cam_et *new_target;
3631
3632                         new_target = xpt_alloc_target(bus, target_id);
3633                         if (new_target == NULL) {
3634                                 status = CAM_RESRC_UNAVAIL;
3635                         } else {
3636                                 target = new_target;
3637                         }
3638                 }
3639                 xpt_unlock_buses();
3640                 if (target != NULL) {
3641                         device = xpt_find_device(target, lun_id);
3642                         if (device == NULL) {
3643                                 /* Create one */
3644                                 struct cam_ed *new_device;
3645
3646                                 new_device =
3647                                     (*(bus->xport->ops->alloc_device))(bus,
3648                                                                        target,
3649                                                                        lun_id);
3650                                 if (new_device == NULL) {
3651                                         status = CAM_RESRC_UNAVAIL;
3652                                 } else {
3653                                         device = new_device;
3654                                 }
3655                         }
3656                 }
3657                 mtx_unlock(&bus->eb_mtx);
3658         }
3659
3660         /*
3661          * Only touch the user's data if we are successful.
3662          */
3663         if (status == CAM_REQ_CMP) {
3664                 new_path->periph = perph;
3665                 new_path->bus = bus;
3666                 new_path->target = target;
3667                 new_path->device = device;
3668                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3669         } else {
3670                 if (device != NULL)
3671                         xpt_release_device(device);
3672                 if (target != NULL)
3673                         xpt_release_target(target);
3674                 if (bus != NULL)
3675                         xpt_release_bus(bus);
3676         }
3677         return (status);
3678 }
3679
3680 cam_status
3681 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3682 {
3683         struct     cam_path *new_path;
3684
3685         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3686         if (new_path == NULL)
3687                 return(CAM_RESRC_UNAVAIL);
3688         xpt_copy_path(new_path, path);
3689         *new_path_ptr = new_path;
3690         return (CAM_REQ_CMP);
3691 }
3692
3693 void
3694 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3695 {
3696
3697         *new_path = *path;
3698         if (path->bus != NULL)
3699                 xpt_acquire_bus(path->bus);
3700         if (path->target != NULL)
3701                 xpt_acquire_target(path->target);
3702         if (path->device != NULL)
3703                 xpt_acquire_device(path->device);
3704 }
3705
3706 void
3707 xpt_release_path(struct cam_path *path)
3708 {
3709         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3710         if (path->device != NULL) {
3711                 xpt_release_device(path->device);
3712                 path->device = NULL;
3713         }
3714         if (path->target != NULL) {
3715                 xpt_release_target(path->target);
3716                 path->target = NULL;
3717         }
3718         if (path->bus != NULL) {
3719                 xpt_release_bus(path->bus);
3720                 path->bus = NULL;
3721         }
3722 }
3723
3724 void
3725 xpt_free_path(struct cam_path *path)
3726 {
3727
3728         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3729         xpt_release_path(path);
3730         free(path, M_CAMPATH);
3731 }
3732
3733 void
3734 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3735     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3736 {
3737
3738         xpt_lock_buses();
3739         if (bus_ref) {
3740                 if (path->bus)
3741                         *bus_ref = path->bus->refcount;
3742                 else
3743                         *bus_ref = 0;
3744         }
3745         if (periph_ref) {
3746                 if (path->periph)
3747                         *periph_ref = path->periph->refcount;
3748                 else
3749                         *periph_ref = 0;
3750         }
3751         xpt_unlock_buses();
3752         if (target_ref) {
3753                 if (path->target)
3754                         *target_ref = path->target->refcount;
3755                 else
3756                         *target_ref = 0;
3757         }
3758         if (device_ref) {
3759                 if (path->device)
3760                         *device_ref = path->device->refcount;
3761                 else
3762                         *device_ref = 0;
3763         }
3764 }
3765
3766 /*
3767  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3768  * in path1, 2 for match with wildcards in path2.
3769  */
3770 int
3771 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3772 {
3773         int retval = 0;
3774
3775         if (path1->bus != path2->bus) {
3776                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3777                         retval = 1;
3778                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3779                         retval = 2;
3780                 else
3781                         return (-1);
3782         }
3783         if (path1->target != path2->target) {
3784                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3785                         if (retval == 0)
3786                                 retval = 1;
3787                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3788                         retval = 2;
3789                 else
3790                         return (-1);
3791         }
3792         if (path1->device != path2->device) {
3793                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3794                         if (retval == 0)
3795                                 retval = 1;
3796                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3797                         retval = 2;
3798                 else
3799                         return (-1);
3800         }
3801         return (retval);
3802 }
3803
3804 int
3805 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3806 {
3807         int retval = 0;
3808
3809         if (path->bus != dev->target->bus) {
3810                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3811                         retval = 1;
3812                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3813                         retval = 2;
3814                 else
3815                         return (-1);
3816         }
3817         if (path->target != dev->target) {
3818                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3819                         if (retval == 0)
3820                                 retval = 1;
3821                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3822                         retval = 2;
3823                 else
3824                         return (-1);
3825         }
3826         if (path->device != dev) {
3827                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3828                         if (retval == 0)
3829                                 retval = 1;
3830                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3831                         retval = 2;
3832                 else
3833                         return (-1);
3834         }
3835         return (retval);
3836 }
3837
3838 void
3839 xpt_print_path(struct cam_path *path)
3840 {
3841         struct sbuf sb;
3842         char buffer[XPT_PRINT_LEN];
3843
3844         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3845         xpt_path_sbuf(path, &sb);
3846         sbuf_finish(&sb);
3847         printf("%s", sbuf_data(&sb));
3848         sbuf_delete(&sb);
3849 }
3850
3851 void
3852 xpt_print_device(struct cam_ed *device)
3853 {
3854
3855         if (device == NULL)
3856                 printf("(nopath): ");
3857         else {
3858                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3859                        device->sim->unit_number,
3860                        device->sim->bus_id,
3861                        device->target->target_id,
3862                        (uintmax_t)device->lun_id);
3863         }
3864 }
3865
3866 void
3867 xpt_print(struct cam_path *path, const char *fmt, ...)
3868 {
3869         va_list ap;
3870         struct sbuf sb;
3871         char buffer[XPT_PRINT_LEN];
3872
3873         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3874
3875         xpt_path_sbuf(path, &sb);
3876         va_start(ap, fmt);
3877         sbuf_vprintf(&sb, fmt, ap);
3878         va_end(ap);
3879
3880         sbuf_finish(&sb);
3881         printf("%s", sbuf_data(&sb));
3882         sbuf_delete(&sb);
3883 }
3884
3885 int
3886 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3887 {
3888         struct sbuf sb;
3889         int len;
3890
3891         sbuf_new(&sb, str, str_len, 0);
3892         len = xpt_path_sbuf(path, &sb);
3893         sbuf_finish(&sb);
3894         return (len);
3895 }
3896
3897 int
3898 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb)
3899 {
3900
3901         if (path == NULL)
3902                 sbuf_printf(sb, "(nopath): ");
3903         else {
3904                 if (path->periph != NULL)
3905                         sbuf_printf(sb, "(%s%d:", path->periph->periph_name,
3906                                     path->periph->unit_number);
3907                 else
3908                         sbuf_printf(sb, "(noperiph:");
3909
3910                 if (path->bus != NULL)
3911                         sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name,
3912                                     path->bus->sim->unit_number,
3913                                     path->bus->sim->bus_id);
3914                 else
3915                         sbuf_printf(sb, "nobus:");
3916
3917                 if (path->target != NULL)
3918                         sbuf_printf(sb, "%d:", path->target->target_id);
3919                 else
3920                         sbuf_printf(sb, "X:");
3921
3922                 if (path->device != NULL)
3923                         sbuf_printf(sb, "%jx): ",
3924                             (uintmax_t)path->device->lun_id);
3925                 else
3926                         sbuf_printf(sb, "X): ");
3927         }
3928
3929         return(sbuf_len(sb));
3930 }
3931
3932 path_id_t
3933 xpt_path_path_id(struct cam_path *path)
3934 {
3935         return(path->bus->path_id);
3936 }
3937
3938 target_id_t
3939 xpt_path_target_id(struct cam_path *path)
3940 {
3941         if (path->target != NULL)
3942                 return (path->target->target_id);
3943         else
3944                 return (CAM_TARGET_WILDCARD);
3945 }
3946
3947 lun_id_t
3948 xpt_path_lun_id(struct cam_path *path)
3949 {
3950         if (path->device != NULL)
3951                 return (path->device->lun_id);
3952         else
3953                 return (CAM_LUN_WILDCARD);
3954 }
3955
3956 struct cam_sim *
3957 xpt_path_sim(struct cam_path *path)
3958 {
3959
3960         return (path->bus->sim);
3961 }
3962
3963 struct cam_periph*
3964 xpt_path_periph(struct cam_path *path)
3965 {
3966
3967         return (path->periph);
3968 }
3969
3970 /*
3971  * Release a CAM control block for the caller.  Remit the cost of the structure
3972  * to the device referenced by the path.  If the this device had no 'credits'
3973  * and peripheral drivers have registered async callbacks for this notification
3974  * call them now.
3975  */
3976 void
3977 xpt_release_ccb(union ccb *free_ccb)
3978 {
3979         struct   cam_ed *device;
3980         struct   cam_periph *periph;
3981
3982         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3983         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3984         device = free_ccb->ccb_h.path->device;
3985         periph = free_ccb->ccb_h.path->periph;
3986
3987         xpt_free_ccb(free_ccb);
3988         periph->periph_allocated--;
3989         cam_ccbq_release_opening(&device->ccbq);
3990         xpt_run_allocq(periph, 0);
3991 }
3992
3993 /* Functions accessed by SIM drivers */
3994
3995 static struct xpt_xport_ops xport_default_ops = {
3996         .alloc_device = xpt_alloc_device_default,
3997         .action = xpt_action_default,
3998         .async = xpt_dev_async_default,
3999 };
4000 static struct xpt_xport xport_default = {
4001         .xport = XPORT_UNKNOWN,
4002         .name = "unknown",
4003         .ops = &xport_default_ops,
4004 };
4005
4006 CAM_XPT_XPORT(xport_default);
4007
4008 /*
4009  * A sim structure, listing the SIM entry points and instance
4010  * identification info is passed to xpt_bus_register to hook the SIM
4011  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
4012  * for this new bus and places it in the array of buses and assigns
4013  * it a path_id.  The path_id may be influenced by "hard wiring"
4014  * information specified by the user.  Once interrupt services are
4015  * available, the bus will be probed.
4016  */
4017 int32_t
4018 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
4019 {
4020         struct cam_eb *new_bus;
4021         struct cam_eb *old_bus;
4022         struct ccb_pathinq cpi;
4023         struct cam_path *path;
4024         cam_status status;
4025
4026         sim->bus_id = bus;
4027         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4028                                           M_CAMXPT, M_NOWAIT|M_ZERO);
4029         if (new_bus == NULL) {
4030                 /* Couldn't satisfy request */
4031                 return (CAM_RESRC_UNAVAIL);
4032         }
4033
4034         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
4035         TAILQ_INIT(&new_bus->et_entries);
4036         cam_sim_hold(sim);
4037         new_bus->sim = sim;
4038         timevalclear(&new_bus->last_reset);
4039         new_bus->flags = 0;
4040         new_bus->refcount = 1;  /* Held until a bus_deregister event */
4041         new_bus->generation = 0;
4042
4043         xpt_lock_buses();
4044         sim->path_id = new_bus->path_id =
4045             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4046         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4047         while (old_bus != NULL
4048             && old_bus->path_id < new_bus->path_id)
4049                 old_bus = TAILQ_NEXT(old_bus, links);
4050         if (old_bus != NULL)
4051                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4052         else
4053                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
4054         xsoftc.bus_generation++;
4055         xpt_unlock_buses();
4056
4057         /*
4058          * Set a default transport so that a PATH_INQ can be issued to
4059          * the SIM.  This will then allow for probing and attaching of
4060          * a more appropriate transport.
4061          */
4062         new_bus->xport = &xport_default;
4063
4064         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
4065                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4066         if (status != CAM_REQ_CMP) {
4067                 xpt_release_bus(new_bus);
4068                 return (CAM_RESRC_UNAVAIL);
4069         }
4070
4071         xpt_path_inq(&cpi, path);
4072
4073         if (cpi.ccb_h.status == CAM_REQ_CMP) {
4074                 struct xpt_xport **xpt;
4075
4076                 SET_FOREACH(xpt, cam_xpt_xport_set) {
4077                         if ((*xpt)->xport == cpi.transport) {
4078                                 new_bus->xport = *xpt;
4079                                 break;
4080                         }
4081                 }
4082                 if (new_bus->xport == NULL) {
4083                         xpt_print(path,
4084                             "No transport found for %d\n", cpi.transport);
4085                         xpt_release_bus(new_bus);
4086                         free(path, M_CAMXPT);
4087                         return (CAM_RESRC_UNAVAIL);
4088                 }
4089         }
4090
4091         /* Notify interested parties */
4092         if (sim->path_id != CAM_XPT_PATH_ID) {
4093
4094                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
4095                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
4096                         union   ccb *scan_ccb;
4097
4098                         /* Initiate bus rescan. */
4099                         scan_ccb = xpt_alloc_ccb_nowait();
4100                         if (scan_ccb != NULL) {
4101                                 scan_ccb->ccb_h.path = path;
4102                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
4103                                 scan_ccb->crcn.flags = 0;
4104                                 xpt_rescan(scan_ccb);
4105                         } else {
4106                                 xpt_print(path,
4107                                           "Can't allocate CCB to scan bus\n");
4108                                 xpt_free_path(path);
4109                         }
4110                 } else
4111                         xpt_free_path(path);
4112         } else
4113                 xpt_free_path(path);
4114         return (CAM_SUCCESS);
4115 }
4116
4117 int32_t
4118 xpt_bus_deregister(path_id_t pathid)
4119 {
4120         struct cam_path bus_path;
4121         cam_status status;
4122
4123         status = xpt_compile_path(&bus_path, NULL, pathid,
4124                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4125         if (status != CAM_REQ_CMP)
4126                 return (status);
4127
4128         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4129         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4130
4131         /* Release the reference count held while registered. */
4132         xpt_release_bus(bus_path.bus);
4133         xpt_release_path(&bus_path);
4134
4135         return (CAM_REQ_CMP);
4136 }
4137
4138 static path_id_t
4139 xptnextfreepathid(void)
4140 {
4141         struct cam_eb *bus;
4142         path_id_t pathid;
4143         const char *strval;
4144
4145         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4146         pathid = 0;
4147         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4148 retry:
4149         /* Find an unoccupied pathid */
4150         while (bus != NULL && bus->path_id <= pathid) {
4151                 if (bus->path_id == pathid)
4152                         pathid++;
4153                 bus = TAILQ_NEXT(bus, links);
4154         }
4155
4156         /*
4157          * Ensure that this pathid is not reserved for
4158          * a bus that may be registered in the future.
4159          */
4160         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4161                 ++pathid;
4162                 /* Start the search over */
4163                 goto retry;
4164         }
4165         return (pathid);
4166 }
4167
4168 static path_id_t
4169 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4170 {
4171         path_id_t pathid;
4172         int i, dunit, val;
4173         char buf[32];
4174         const char *dname;
4175
4176         pathid = CAM_XPT_PATH_ID;
4177         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4178         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4179                 return (pathid);
4180         i = 0;
4181         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4182                 if (strcmp(dname, "scbus")) {
4183                         /* Avoid a bit of foot shooting. */
4184                         continue;
4185                 }
4186                 if (dunit < 0)          /* unwired?! */
4187                         continue;
4188                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4189                         if (sim_bus == val) {
4190                                 pathid = dunit;
4191                                 break;
4192                         }
4193                 } else if (sim_bus == 0) {
4194                         /* Unspecified matches bus 0 */
4195                         pathid = dunit;
4196                         break;
4197                 } else {
4198                         printf("Ambiguous scbus configuration for %s%d "
4199                                "bus %d, cannot wire down.  The kernel "
4200                                "config entry for scbus%d should "
4201                                "specify a controller bus.\n"
4202                                "Scbus will be assigned dynamically.\n",
4203                                sim_name, sim_unit, sim_bus, dunit);
4204                         break;
4205                 }
4206         }
4207
4208         if (pathid == CAM_XPT_PATH_ID)
4209                 pathid = xptnextfreepathid();
4210         return (pathid);
4211 }
4212
4213 static const char *
4214 xpt_async_string(u_int32_t async_code)
4215 {
4216
4217         switch (async_code) {
4218         case AC_BUS_RESET: return ("AC_BUS_RESET");
4219         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4220         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4221         case AC_SENT_BDR: return ("AC_SENT_BDR");
4222         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4223         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4224         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4225         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4226         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4227         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4228         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4229         case AC_CONTRACT: return ("AC_CONTRACT");
4230         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4231         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4232         }
4233         return ("AC_UNKNOWN");
4234 }
4235
4236 static int
4237 xpt_async_size(u_int32_t async_code)
4238 {
4239
4240         switch (async_code) {
4241         case AC_BUS_RESET: return (0);
4242         case AC_UNSOL_RESEL: return (0);
4243         case AC_SCSI_AEN: return (0);
4244         case AC_SENT_BDR: return (0);
4245         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4246         case AC_PATH_DEREGISTERED: return (0);
4247         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4248         case AC_LOST_DEVICE: return (0);
4249         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4250         case AC_INQ_CHANGED: return (0);
4251         case AC_GETDEV_CHANGED: return (0);
4252         case AC_CONTRACT: return (sizeof(struct ac_contract));
4253         case AC_ADVINFO_CHANGED: return (-1);
4254         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4255         }
4256         return (0);
4257 }
4258
4259 static int
4260 xpt_async_process_dev(struct cam_ed *device, void *arg)
4261 {
4262         union ccb *ccb = arg;
4263         struct cam_path *path = ccb->ccb_h.path;
4264         void *async_arg = ccb->casync.async_arg_ptr;
4265         u_int32_t async_code = ccb->casync.async_code;
4266         int relock;
4267
4268         if (path->device != device
4269          && path->device->lun_id != CAM_LUN_WILDCARD
4270          && device->lun_id != CAM_LUN_WILDCARD)
4271                 return (1);
4272
4273         /*
4274          * The async callback could free the device.
4275          * If it is a broadcast async, it doesn't hold
4276          * device reference, so take our own reference.
4277          */
4278         xpt_acquire_device(device);
4279
4280         /*
4281          * If async for specific device is to be delivered to
4282          * the wildcard client, take the specific device lock.
4283          * XXX: We may need a way for client to specify it.
4284          */
4285         if ((device->lun_id == CAM_LUN_WILDCARD &&
4286              path->device->lun_id != CAM_LUN_WILDCARD) ||
4287             (device->target->target_id == CAM_TARGET_WILDCARD &&
4288              path->target->target_id != CAM_TARGET_WILDCARD) ||
4289             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4290              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4291                 mtx_unlock(&device->device_mtx);
4292                 xpt_path_lock(path);
4293                 relock = 1;
4294         } else
4295                 relock = 0;
4296
4297         (*(device->target->bus->xport->ops->async))(async_code,
4298             device->target->bus, device->target, device, async_arg);
4299         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4300
4301         if (relock) {
4302                 xpt_path_unlock(path);
4303                 mtx_lock(&device->device_mtx);
4304         }
4305         xpt_release_device(device);
4306         return (1);
4307 }
4308
4309 static int
4310 xpt_async_process_tgt(struct cam_et *target, void *arg)
4311 {
4312         union ccb *ccb = arg;
4313         struct cam_path *path = ccb->ccb_h.path;
4314
4315         if (path->target != target
4316          && path->target->target_id != CAM_TARGET_WILDCARD
4317          && target->target_id != CAM_TARGET_WILDCARD)
4318                 return (1);
4319
4320         if (ccb->casync.async_code == AC_SENT_BDR) {
4321                 /* Update our notion of when the last reset occurred */
4322                 microtime(&target->last_reset);
4323         }
4324
4325         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4326 }
4327
4328 static void
4329 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4330 {
4331         struct cam_eb *bus;
4332         struct cam_path *path;
4333         void *async_arg;
4334         u_int32_t async_code;
4335
4336         path = ccb->ccb_h.path;
4337         async_code = ccb->casync.async_code;
4338         async_arg = ccb->casync.async_arg_ptr;
4339         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4340             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4341         bus = path->bus;
4342
4343         if (async_code == AC_BUS_RESET) {
4344                 /* Update our notion of when the last reset occurred */
4345                 microtime(&bus->last_reset);
4346         }
4347
4348         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4349
4350         /*
4351          * If this wasn't a fully wildcarded async, tell all
4352          * clients that want all async events.
4353          */
4354         if (bus != xpt_periph->path->bus) {
4355                 xpt_path_lock(xpt_periph->path);
4356                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4357                 xpt_path_unlock(xpt_periph->path);
4358         }
4359
4360         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4361                 xpt_release_devq(path, 1, TRUE);
4362         else
4363                 xpt_release_simq(path->bus->sim, TRUE);
4364         if (ccb->casync.async_arg_size > 0)
4365                 free(async_arg, M_CAMXPT);
4366         xpt_free_path(path);
4367         xpt_free_ccb(ccb);
4368 }
4369
4370 static void
4371 xpt_async_bcast(struct async_list *async_head,
4372                 u_int32_t async_code,
4373                 struct cam_path *path, void *async_arg)
4374 {
4375         struct async_node *cur_entry;
4376         struct mtx *mtx;
4377
4378         cur_entry = SLIST_FIRST(async_head);
4379         while (cur_entry != NULL) {
4380                 struct async_node *next_entry;
4381                 /*
4382                  * Grab the next list entry before we call the current
4383                  * entry's callback.  This is because the callback function
4384                  * can delete its async callback entry.
4385                  */
4386                 next_entry = SLIST_NEXT(cur_entry, links);
4387                 if ((cur_entry->event_enable & async_code) != 0) {
4388                         mtx = cur_entry->event_lock ?
4389                             path->device->sim->mtx : NULL;
4390                         if (mtx)
4391                                 mtx_lock(mtx);
4392                         cur_entry->callback(cur_entry->callback_arg,
4393                                             async_code, path,
4394                                             async_arg);
4395                         if (mtx)
4396                                 mtx_unlock(mtx);
4397                 }
4398                 cur_entry = next_entry;
4399         }
4400 }
4401
4402 void
4403 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4404 {
4405         union ccb *ccb;
4406         int size;
4407
4408         ccb = xpt_alloc_ccb_nowait();
4409         if (ccb == NULL) {
4410                 xpt_print(path, "Can't allocate CCB to send %s\n",
4411                     xpt_async_string(async_code));
4412                 return;
4413         }
4414
4415         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4416                 xpt_print(path, "Can't allocate path to send %s\n",
4417                     xpt_async_string(async_code));
4418                 xpt_free_ccb(ccb);
4419                 return;
4420         }
4421         ccb->ccb_h.path->periph = NULL;
4422         ccb->ccb_h.func_code = XPT_ASYNC;
4423         ccb->ccb_h.cbfcnp = xpt_async_process;
4424         ccb->ccb_h.flags |= CAM_UNLOCKED;
4425         ccb->casync.async_code = async_code;
4426         ccb->casync.async_arg_size = 0;
4427         size = xpt_async_size(async_code);
4428         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
4429             ("xpt_async: func %#x %s aync_code %d %s\n",
4430                 ccb->ccb_h.func_code,
4431                 xpt_action_name(ccb->ccb_h.func_code),
4432                 async_code,
4433                 xpt_async_string(async_code)));
4434         if (size > 0 && async_arg != NULL) {
4435                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4436                 if (ccb->casync.async_arg_ptr == NULL) {
4437                         xpt_print(path, "Can't allocate argument to send %s\n",
4438                             xpt_async_string(async_code));
4439                         xpt_free_path(ccb->ccb_h.path);
4440                         xpt_free_ccb(ccb);
4441                         return;
4442                 }
4443                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4444                 ccb->casync.async_arg_size = size;
4445         } else if (size < 0) {
4446                 ccb->casync.async_arg_ptr = async_arg;
4447                 ccb->casync.async_arg_size = size;
4448         }
4449         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4450                 xpt_freeze_devq(path, 1);
4451         else
4452                 xpt_freeze_simq(path->bus->sim, 1);
4453         xpt_done(ccb);
4454 }
4455
4456 static void
4457 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4458                       struct cam_et *target, struct cam_ed *device,
4459                       void *async_arg)
4460 {
4461
4462         /*
4463          * We only need to handle events for real devices.
4464          */
4465         if (target->target_id == CAM_TARGET_WILDCARD
4466          || device->lun_id == CAM_LUN_WILDCARD)
4467                 return;
4468
4469         printf("%s called\n", __func__);
4470 }
4471
4472 static uint32_t
4473 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4474 {
4475         struct cam_devq *devq;
4476         uint32_t freeze;
4477
4478         devq = dev->sim->devq;
4479         mtx_assert(&devq->send_mtx, MA_OWNED);
4480         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4481             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4482             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4483         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4484         /* Remove frozen device from sendq. */
4485         if (device_is_queued(dev))
4486                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4487         return (freeze);
4488 }
4489
4490 u_int32_t
4491 xpt_freeze_devq(struct cam_path *path, u_int count)
4492 {
4493         struct cam_ed   *dev = path->device;
4494         struct cam_devq *devq;
4495         uint32_t         freeze;
4496
4497         devq = dev->sim->devq;
4498         mtx_lock(&devq->send_mtx);
4499         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4500         freeze = xpt_freeze_devq_device(dev, count);
4501         mtx_unlock(&devq->send_mtx);
4502         return (freeze);
4503 }
4504
4505 u_int32_t
4506 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4507 {
4508         struct cam_devq *devq;
4509         uint32_t         freeze;
4510
4511         devq = sim->devq;
4512         mtx_lock(&devq->send_mtx);
4513         freeze = (devq->send_queue.qfrozen_cnt += count);
4514         mtx_unlock(&devq->send_mtx);
4515         return (freeze);
4516 }
4517
4518 static void
4519 xpt_release_devq_timeout(void *arg)
4520 {
4521         struct cam_ed *dev;
4522         struct cam_devq *devq;
4523
4524         dev = (struct cam_ed *)arg;
4525         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4526         devq = dev->sim->devq;
4527         mtx_assert(&devq->send_mtx, MA_OWNED);
4528         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4529                 xpt_run_devq(devq);
4530 }
4531
4532 void
4533 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4534 {
4535         struct cam_ed *dev;
4536         struct cam_devq *devq;
4537
4538         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4539             count, run_queue));
4540         dev = path->device;
4541         devq = dev->sim->devq;
4542         mtx_lock(&devq->send_mtx);
4543         if (xpt_release_devq_device(dev, count, run_queue))
4544                 xpt_run_devq(dev->sim->devq);
4545         mtx_unlock(&devq->send_mtx);
4546 }
4547
4548 static int
4549 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4550 {
4551
4552         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4553         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4554             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4555             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4556         if (count > dev->ccbq.queue.qfrozen_cnt) {
4557 #ifdef INVARIANTS
4558                 printf("xpt_release_devq(): requested %u > present %u\n",
4559                     count, dev->ccbq.queue.qfrozen_cnt);
4560 #endif
4561                 count = dev->ccbq.queue.qfrozen_cnt;
4562         }
4563         dev->ccbq.queue.qfrozen_cnt -= count;
4564         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4565                 /*
4566                  * No longer need to wait for a successful
4567                  * command completion.
4568                  */
4569                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4570                 /*
4571                  * Remove any timeouts that might be scheduled
4572                  * to release this queue.
4573                  */
4574                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4575                         callout_stop(&dev->callout);
4576                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4577                 }
4578                 /*
4579                  * Now that we are unfrozen schedule the
4580                  * device so any pending transactions are
4581                  * run.
4582                  */
4583                 xpt_schedule_devq(dev->sim->devq, dev);
4584         } else
4585                 run_queue = 0;
4586         return (run_queue);
4587 }
4588
4589 void
4590 xpt_release_simq(struct cam_sim *sim, int run_queue)
4591 {
4592         struct cam_devq *devq;
4593
4594         devq = sim->devq;
4595         mtx_lock(&devq->send_mtx);
4596         if (devq->send_queue.qfrozen_cnt <= 0) {
4597 #ifdef INVARIANTS
4598                 printf("xpt_release_simq: requested 1 > present %u\n",
4599                     devq->send_queue.qfrozen_cnt);
4600 #endif
4601         } else
4602                 devq->send_queue.qfrozen_cnt--;
4603         if (devq->send_queue.qfrozen_cnt == 0) {
4604                 /*
4605                  * If there is a timeout scheduled to release this
4606                  * sim queue, remove it.  The queue frozen count is
4607                  * already at 0.
4608                  */
4609                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4610                         callout_stop(&sim->callout);
4611                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4612                 }
4613                 if (run_queue) {
4614                         /*
4615                          * Now that we are unfrozen run the send queue.
4616                          */
4617                         xpt_run_devq(sim->devq);
4618                 }
4619         }
4620         mtx_unlock(&devq->send_mtx);
4621 }
4622
4623 void
4624 xpt_done(union ccb *done_ccb)
4625 {
4626         struct cam_doneq *queue;
4627         int     run, hash;
4628
4629 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4630         if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4631             done_ccb->csio.bio != NULL)
4632                 biotrack(done_ccb->csio.bio, __func__);
4633 #endif
4634
4635         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4636             ("xpt_done: func= %#x %s status %#x\n",
4637                 done_ccb->ccb_h.func_code,
4638                 xpt_action_name(done_ccb->ccb_h.func_code),
4639                 done_ccb->ccb_h.status));
4640         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4641                 return;
4642
4643         /* Store the time the ccb was in the sim */
4644         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4645         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4646             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4647         queue = &cam_doneqs[hash];
4648         mtx_lock(&queue->cam_doneq_mtx);
4649         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4650         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4651         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4652         mtx_unlock(&queue->cam_doneq_mtx);
4653         if (run)
4654                 wakeup(&queue->cam_doneq);
4655 }
4656
4657 void
4658 xpt_done_direct(union ccb *done_ccb)
4659 {
4660
4661         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4662             ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4663         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4664                 return;
4665
4666         /* Store the time the ccb was in the sim */
4667         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4668         xpt_done_process(&done_ccb->ccb_h);
4669 }
4670
4671 union ccb *
4672 xpt_alloc_ccb()
4673 {
4674         union ccb *new_ccb;
4675
4676         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4677         return (new_ccb);
4678 }
4679
4680 union ccb *
4681 xpt_alloc_ccb_nowait()
4682 {
4683         union ccb *new_ccb;
4684
4685         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4686         return (new_ccb);
4687 }
4688
4689 void
4690 xpt_free_ccb(union ccb *free_ccb)
4691 {
4692         free(free_ccb, M_CAMCCB);
4693 }
4694
4695
4696
4697 /* Private XPT functions */
4698
4699 /*
4700  * Get a CAM control block for the caller. Charge the structure to the device
4701  * referenced by the path.  If we don't have sufficient resources to allocate
4702  * more ccbs, we return NULL.
4703  */
4704 static union ccb *
4705 xpt_get_ccb_nowait(struct cam_periph *periph)
4706 {
4707         union ccb *new_ccb;
4708
4709         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4710         if (new_ccb == NULL)
4711                 return (NULL);
4712         periph->periph_allocated++;
4713         cam_ccbq_take_opening(&periph->path->device->ccbq);
4714         return (new_ccb);
4715 }
4716
4717 static union ccb *
4718 xpt_get_ccb(struct cam_periph *periph)
4719 {
4720         union ccb *new_ccb;
4721
4722         cam_periph_unlock(periph);
4723         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4724         cam_periph_lock(periph);
4725         periph->periph_allocated++;
4726         cam_ccbq_take_opening(&periph->path->device->ccbq);
4727         return (new_ccb);
4728 }
4729
4730 union ccb *
4731 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4732 {
4733         struct ccb_hdr *ccb_h;
4734
4735         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4736         cam_periph_assert(periph, MA_OWNED);
4737         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4738             ccb_h->pinfo.priority != priority) {
4739                 if (priority < periph->immediate_priority) {
4740                         periph->immediate_priority = priority;
4741                         xpt_run_allocq(periph, 0);
4742                 } else
4743                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4744                             "cgticb", 0);
4745         }
4746         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4747         return ((union ccb *)ccb_h);
4748 }
4749
4750 static void
4751 xpt_acquire_bus(struct cam_eb *bus)
4752 {
4753
4754         xpt_lock_buses();
4755         bus->refcount++;
4756         xpt_unlock_buses();
4757 }
4758
4759 static void
4760 xpt_release_bus(struct cam_eb *bus)
4761 {
4762
4763         xpt_lock_buses();
4764         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4765         if (--bus->refcount > 0) {
4766                 xpt_unlock_buses();
4767                 return;
4768         }
4769         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4770         xsoftc.bus_generation++;
4771         xpt_unlock_buses();
4772         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4773             ("destroying bus, but target list is not empty"));
4774         cam_sim_release(bus->sim);
4775         mtx_destroy(&bus->eb_mtx);
4776         free(bus, M_CAMXPT);
4777 }
4778
4779 static struct cam_et *
4780 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4781 {
4782         struct cam_et *cur_target, *target;
4783
4784         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4785         mtx_assert(&bus->eb_mtx, MA_OWNED);
4786         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4787                                          M_NOWAIT|M_ZERO);
4788         if (target == NULL)
4789                 return (NULL);
4790
4791         TAILQ_INIT(&target->ed_entries);
4792         target->bus = bus;
4793         target->target_id = target_id;
4794         target->refcount = 1;
4795         target->generation = 0;
4796         target->luns = NULL;
4797         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4798         timevalclear(&target->last_reset);
4799         /*
4800          * Hold a reference to our parent bus so it
4801          * will not go away before we do.
4802          */
4803         bus->refcount++;
4804
4805         /* Insertion sort into our bus's target list */
4806         cur_target = TAILQ_FIRST(&bus->et_entries);
4807         while (cur_target != NULL && cur_target->target_id < target_id)
4808                 cur_target = TAILQ_NEXT(cur_target, links);
4809         if (cur_target != NULL) {
4810                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4811         } else {
4812                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4813         }
4814         bus->generation++;
4815         return (target);
4816 }
4817
4818 static void
4819 xpt_acquire_target(struct cam_et *target)
4820 {
4821         struct cam_eb *bus = target->bus;
4822
4823         mtx_lock(&bus->eb_mtx);
4824         target->refcount++;
4825         mtx_unlock(&bus->eb_mtx);
4826 }
4827
4828 static void
4829 xpt_release_target(struct cam_et *target)
4830 {
4831         struct cam_eb *bus = target->bus;
4832
4833         mtx_lock(&bus->eb_mtx);
4834         if (--target->refcount > 0) {
4835                 mtx_unlock(&bus->eb_mtx);
4836                 return;
4837         }
4838         TAILQ_REMOVE(&bus->et_entries, target, links);
4839         bus->generation++;
4840         mtx_unlock(&bus->eb_mtx);
4841         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4842             ("destroying target, but device list is not empty"));
4843         xpt_release_bus(bus);
4844         mtx_destroy(&target->luns_mtx);
4845         if (target->luns)
4846                 free(target->luns, M_CAMXPT);
4847         free(target, M_CAMXPT);
4848 }
4849
4850 static struct cam_ed *
4851 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4852                          lun_id_t lun_id)
4853 {
4854         struct cam_ed *device;
4855
4856         device = xpt_alloc_device(bus, target, lun_id);
4857         if (device == NULL)
4858                 return (NULL);
4859
4860         device->mintags = 1;
4861         device->maxtags = 1;
4862         return (device);
4863 }
4864
4865 static void
4866 xpt_destroy_device(void *context, int pending)
4867 {
4868         struct cam_ed   *device = context;
4869
4870         mtx_lock(&device->device_mtx);
4871         mtx_destroy(&device->device_mtx);
4872         free(device, M_CAMDEV);
4873 }
4874
4875 struct cam_ed *
4876 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4877 {
4878         struct cam_ed   *cur_device, *device;
4879         struct cam_devq *devq;
4880         cam_status status;
4881
4882         mtx_assert(&bus->eb_mtx, MA_OWNED);
4883         /* Make space for us in the device queue on our bus */
4884         devq = bus->sim->devq;
4885         mtx_lock(&devq->send_mtx);
4886         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4887         mtx_unlock(&devq->send_mtx);
4888         if (status != CAM_REQ_CMP)
4889                 return (NULL);
4890
4891         device = (struct cam_ed *)malloc(sizeof(*device),
4892                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4893         if (device == NULL)
4894                 return (NULL);
4895
4896         cam_init_pinfo(&device->devq_entry);
4897         device->target = target;
4898         device->lun_id = lun_id;
4899         device->sim = bus->sim;
4900         if (cam_ccbq_init(&device->ccbq,
4901                           bus->sim->max_dev_openings) != 0) {
4902                 free(device, M_CAMDEV);
4903                 return (NULL);
4904         }
4905         SLIST_INIT(&device->asyncs);
4906         SLIST_INIT(&device->periphs);
4907         device->generation = 0;
4908         device->flags = CAM_DEV_UNCONFIGURED;
4909         device->tag_delay_count = 0;
4910         device->tag_saved_openings = 0;
4911         device->refcount = 1;
4912         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4913         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4914         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4915         /*
4916          * Hold a reference to our parent bus so it
4917          * will not go away before we do.
4918          */
4919         target->refcount++;
4920
4921         cur_device = TAILQ_FIRST(&target->ed_entries);
4922         while (cur_device != NULL && cur_device->lun_id < lun_id)
4923                 cur_device = TAILQ_NEXT(cur_device, links);
4924         if (cur_device != NULL)
4925                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4926         else
4927                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4928         target->generation++;
4929         return (device);
4930 }
4931
4932 void
4933 xpt_acquire_device(struct cam_ed *device)
4934 {
4935         struct cam_eb *bus = device->target->bus;
4936
4937         mtx_lock(&bus->eb_mtx);
4938         device->refcount++;
4939         mtx_unlock(&bus->eb_mtx);
4940 }
4941
4942 void
4943 xpt_release_device(struct cam_ed *device)
4944 {
4945         struct cam_eb *bus = device->target->bus;
4946         struct cam_devq *devq;
4947
4948         mtx_lock(&bus->eb_mtx);
4949         if (--device->refcount > 0) {
4950                 mtx_unlock(&bus->eb_mtx);
4951                 return;
4952         }
4953
4954         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4955         device->target->generation++;
4956         mtx_unlock(&bus->eb_mtx);
4957
4958         /* Release our slot in the devq */
4959         devq = bus->sim->devq;
4960         mtx_lock(&devq->send_mtx);
4961         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4962         mtx_unlock(&devq->send_mtx);
4963
4964         KASSERT(SLIST_EMPTY(&device->periphs),
4965             ("destroying device, but periphs list is not empty"));
4966         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4967             ("destroying device while still queued for ccbs"));
4968
4969         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4970                 callout_stop(&device->callout);
4971
4972         xpt_release_target(device->target);
4973
4974         cam_ccbq_fini(&device->ccbq);
4975         /*
4976          * Free allocated memory.  free(9) does nothing if the
4977          * supplied pointer is NULL, so it is safe to call without
4978          * checking.
4979          */
4980         free(device->supported_vpds, M_CAMXPT);
4981         free(device->device_id, M_CAMXPT);
4982         free(device->ext_inq, M_CAMXPT);
4983         free(device->physpath, M_CAMXPT);
4984         free(device->rcap_buf, M_CAMXPT);
4985         free(device->serial_num, M_CAMXPT);
4986         free(device->nvme_data, M_CAMXPT);
4987         free(device->nvme_cdata, M_CAMXPT);
4988         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4989 }
4990
4991 u_int32_t
4992 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4993 {
4994         int     result;
4995         struct  cam_ed *dev;
4996
4997         dev = path->device;
4998         mtx_lock(&dev->sim->devq->send_mtx);
4999         result = cam_ccbq_resize(&dev->ccbq, newopenings);
5000         mtx_unlock(&dev->sim->devq->send_mtx);
5001         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5002          || (dev->inq_flags & SID_CmdQue) != 0)
5003                 dev->tag_saved_openings = newopenings;
5004         return (result);
5005 }
5006
5007 static struct cam_eb *
5008 xpt_find_bus(path_id_t path_id)
5009 {
5010         struct cam_eb *bus;
5011
5012         xpt_lock_buses();
5013         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
5014              bus != NULL;
5015              bus = TAILQ_NEXT(bus, links)) {
5016                 if (bus->path_id == path_id) {
5017                         bus->refcount++;
5018                         break;
5019                 }
5020         }
5021         xpt_unlock_buses();
5022         return (bus);
5023 }
5024
5025 static struct cam_et *
5026 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5027 {
5028         struct cam_et *target;
5029
5030         mtx_assert(&bus->eb_mtx, MA_OWNED);
5031         for (target = TAILQ_FIRST(&bus->et_entries);
5032              target != NULL;
5033              target = TAILQ_NEXT(target, links)) {
5034                 if (target->target_id == target_id) {
5035                         target->refcount++;
5036                         break;
5037                 }
5038         }
5039         return (target);
5040 }
5041
5042 static struct cam_ed *
5043 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5044 {
5045         struct cam_ed *device;
5046
5047         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
5048         for (device = TAILQ_FIRST(&target->ed_entries);
5049              device != NULL;
5050              device = TAILQ_NEXT(device, links)) {
5051                 if (device->lun_id == lun_id) {
5052                         device->refcount++;
5053                         break;
5054                 }
5055         }
5056         return (device);
5057 }
5058
5059 void
5060 xpt_start_tags(struct cam_path *path)
5061 {
5062         struct ccb_relsim crs;
5063         struct cam_ed *device;
5064         struct cam_sim *sim;
5065         int    newopenings;
5066
5067         device = path->device;
5068         sim = path->bus->sim;
5069         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5070         xpt_freeze_devq(path, /*count*/1);
5071         device->inq_flags |= SID_CmdQue;
5072         if (device->tag_saved_openings != 0)
5073                 newopenings = device->tag_saved_openings;
5074         else
5075                 newopenings = min(device->maxtags,
5076                                   sim->max_tagged_dev_openings);
5077         xpt_dev_ccbq_resize(path, newopenings);
5078         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5079         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5080         crs.ccb_h.func_code = XPT_REL_SIMQ;
5081         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5082         crs.openings
5083             = crs.release_timeout
5084             = crs.qfrozen_cnt
5085             = 0;
5086         xpt_action((union ccb *)&crs);
5087 }
5088
5089 void
5090 xpt_stop_tags(struct cam_path *path)
5091 {
5092         struct ccb_relsim crs;
5093         struct cam_ed *device;
5094         struct cam_sim *sim;
5095
5096         device = path->device;
5097         sim = path->bus->sim;
5098         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5099         device->tag_delay_count = 0;
5100         xpt_freeze_devq(path, /*count*/1);
5101         device->inq_flags &= ~SID_CmdQue;
5102         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
5103         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5104         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5105         crs.ccb_h.func_code = XPT_REL_SIMQ;
5106         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5107         crs.openings
5108             = crs.release_timeout
5109             = crs.qfrozen_cnt
5110             = 0;
5111         xpt_action((union ccb *)&crs);
5112 }
5113
5114 /*
5115  * Assume all possible buses are detected by this time, so allow boot
5116  * as soon as they all are scanned.
5117  */
5118 static void
5119 xpt_boot_delay(void *arg)
5120 {
5121
5122         xpt_release_boot();
5123 }
5124
5125 /*
5126  * Now that all config hooks have completed, start boot_delay timer,
5127  * waiting for possibly still undetected buses (USB) to appear.
5128  */
5129 static void
5130 xpt_ch_done(void *arg)
5131 {
5132
5133         callout_init(&xsoftc.boot_callout, 1);
5134         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5135             xpt_boot_delay, NULL, 0);
5136 }
5137 SYSINIT(xpt_hw_delay, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_ANY, xpt_ch_done, NULL);
5138
5139 /*
5140  * Now that interrupts are enabled, go find our devices
5141  */
5142 static void
5143 xpt_config(void *arg)
5144 {
5145         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
5146                 printf("xpt_config: failed to create taskqueue thread.\n");
5147
5148         /* Setup debugging path */
5149         if (cam_dflags != CAM_DEBUG_NONE) {
5150                 if (xpt_create_path(&cam_dpath, NULL,
5151                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
5152                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
5153                         printf("xpt_config: xpt_create_path() failed for debug"
5154                                " target %d:%d:%d, debugging disabled\n",
5155                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
5156                         cam_dflags = CAM_DEBUG_NONE;
5157                 }
5158         } else
5159                 cam_dpath = NULL;
5160
5161         periphdriver_init(1);
5162         xpt_hold_boot();
5163
5164         /* Fire up rescan thread. */
5165         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5166             "cam", "scanner")) {
5167                 printf("xpt_config: failed to create rescan thread.\n");
5168         }
5169 }
5170
5171 void
5172 xpt_hold_boot_locked(void)
5173 {
5174
5175         if (xsoftc.buses_to_config++ == 0)
5176                 root_mount_hold_token("CAM", &xsoftc.xpt_rootmount);
5177 }
5178
5179 void
5180 xpt_hold_boot(void)
5181 {
5182
5183         xpt_lock_buses();
5184         xpt_hold_boot_locked();
5185         xpt_unlock_buses();
5186 }
5187
5188 void
5189 xpt_release_boot(void)
5190 {
5191
5192         xpt_lock_buses();
5193         if (--xsoftc.buses_to_config == 0) {
5194                 if (xsoftc.buses_config_done == 0) {
5195                         xsoftc.buses_config_done = 1;
5196                         xsoftc.buses_to_config++;
5197                         TASK_INIT(&xsoftc.boot_task, 0, xpt_finishconfig_task,
5198                             NULL);
5199                         taskqueue_enqueue(taskqueue_thread, &xsoftc.boot_task);
5200                 } else
5201                         root_mount_rel(&xsoftc.xpt_rootmount);
5202         }
5203         xpt_unlock_buses();
5204 }
5205
5206 /*
5207  * If the given device only has one peripheral attached to it, and if that
5208  * peripheral is the passthrough driver, announce it.  This insures that the
5209  * user sees some sort of announcement for every peripheral in their system.
5210  */
5211 static int
5212 xptpassannouncefunc(struct cam_ed *device, void *arg)
5213 {
5214         struct cam_periph *periph;
5215         int i;
5216
5217         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5218              periph = SLIST_NEXT(periph, periph_links), i++);
5219
5220         periph = SLIST_FIRST(&device->periphs);
5221         if ((i == 1)
5222          && (strncmp(periph->periph_name, "pass", 4) == 0))
5223                 xpt_announce_periph(periph, NULL);
5224
5225         return(1);
5226 }
5227
5228 static void
5229 xpt_finishconfig_task(void *context, int pending)
5230 {
5231
5232         periphdriver_init(2);
5233         /*
5234          * Check for devices with no "standard" peripheral driver
5235          * attached.  For any devices like that, announce the
5236          * passthrough driver so the user will see something.
5237          */
5238         if (!bootverbose)
5239                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5240
5241         xpt_release_boot();
5242 }
5243
5244 cam_status
5245 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5246                    struct cam_path *path)
5247 {
5248         struct ccb_setasync csa;
5249         cam_status status;
5250         int xptpath = 0;
5251
5252         if (path == NULL) {
5253                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5254                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5255                 if (status != CAM_REQ_CMP)
5256                         return (status);
5257                 xpt_path_lock(path);
5258                 xptpath = 1;
5259         }
5260
5261         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5262         csa.ccb_h.func_code = XPT_SASYNC_CB;
5263         csa.event_enable = event;
5264         csa.callback = cbfunc;
5265         csa.callback_arg = cbarg;
5266         xpt_action((union ccb *)&csa);
5267         status = csa.ccb_h.status;
5268
5269         CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5270             ("xpt_register_async: func %p\n", cbfunc));
5271
5272         if (xptpath) {
5273                 xpt_path_unlock(path);
5274                 xpt_free_path(path);
5275         }
5276
5277         if ((status == CAM_REQ_CMP) &&
5278             (csa.event_enable & AC_FOUND_DEVICE)) {
5279                 /*
5280                  * Get this peripheral up to date with all
5281                  * the currently existing devices.
5282                  */
5283                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5284         }
5285         if ((status == CAM_REQ_CMP) &&
5286             (csa.event_enable & AC_PATH_REGISTERED)) {
5287                 /*
5288                  * Get this peripheral up to date with all
5289                  * the currently existing buses.
5290                  */
5291                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5292         }
5293
5294         return (status);
5295 }
5296
5297 static void
5298 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5299 {
5300         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5301
5302         switch (work_ccb->ccb_h.func_code) {
5303         /* Common cases first */
5304         case XPT_PATH_INQ:              /* Path routing inquiry */
5305         {
5306                 struct ccb_pathinq *cpi;
5307
5308                 cpi = &work_ccb->cpi;
5309                 cpi->version_num = 1; /* XXX??? */
5310                 cpi->hba_inquiry = 0;
5311                 cpi->target_sprt = 0;
5312                 cpi->hba_misc = 0;
5313                 cpi->hba_eng_cnt = 0;
5314                 cpi->max_target = 0;
5315                 cpi->max_lun = 0;
5316                 cpi->initiator_id = 0;
5317                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5318                 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5319                 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5320                 cpi->unit_number = sim->unit_number;
5321                 cpi->bus_id = sim->bus_id;
5322                 cpi->base_transfer_speed = 0;
5323                 cpi->protocol = PROTO_UNSPECIFIED;
5324                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5325                 cpi->transport = XPORT_UNSPECIFIED;
5326                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5327                 cpi->ccb_h.status = CAM_REQ_CMP;
5328                 xpt_done(work_ccb);
5329                 break;
5330         }
5331         default:
5332                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5333                 xpt_done(work_ccb);
5334                 break;
5335         }
5336 }
5337
5338 /*
5339  * The xpt as a "controller" has no interrupt sources, so polling
5340  * is a no-op.
5341  */
5342 static void
5343 xptpoll(struct cam_sim *sim)
5344 {
5345 }
5346
5347 void
5348 xpt_lock_buses(void)
5349 {
5350         mtx_lock(&xsoftc.xpt_topo_lock);
5351 }
5352
5353 void
5354 xpt_unlock_buses(void)
5355 {
5356         mtx_unlock(&xsoftc.xpt_topo_lock);
5357 }
5358
5359 struct mtx *
5360 xpt_path_mtx(struct cam_path *path)
5361 {
5362
5363         return (&path->device->device_mtx);
5364 }
5365
5366 static void
5367 xpt_done_process(struct ccb_hdr *ccb_h)
5368 {
5369         struct cam_sim *sim = NULL;
5370         struct cam_devq *devq = NULL;
5371         struct mtx *mtx = NULL;
5372
5373 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5374         struct ccb_scsiio *csio;
5375
5376         if (ccb_h->func_code == XPT_SCSI_IO) {
5377                 csio = &((union ccb *)ccb_h)->csio;
5378                 if (csio->bio != NULL)
5379                         biotrack(csio->bio, __func__);
5380         }
5381 #endif
5382
5383         if (ccb_h->flags & CAM_HIGH_POWER) {
5384                 struct highpowerlist    *hphead;
5385                 struct cam_ed           *device;
5386
5387                 mtx_lock(&xsoftc.xpt_highpower_lock);
5388                 hphead = &xsoftc.highpowerq;
5389
5390                 device = STAILQ_FIRST(hphead);
5391
5392                 /*
5393                  * Increment the count since this command is done.
5394                  */
5395                 xsoftc.num_highpower++;
5396
5397                 /*
5398                  * Any high powered commands queued up?
5399                  */
5400                 if (device != NULL) {
5401
5402                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5403                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5404
5405                         mtx_lock(&device->sim->devq->send_mtx);
5406                         xpt_release_devq_device(device,
5407                                          /*count*/1, /*runqueue*/TRUE);
5408                         mtx_unlock(&device->sim->devq->send_mtx);
5409                 } else
5410                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5411         }
5412
5413         /*
5414          * Insulate against a race where the periph is destroyed but CCBs are
5415          * still not all processed. This shouldn't happen, but allows us better
5416          * bug diagnostic when it does.
5417          */
5418         if (ccb_h->path->bus)
5419                 sim = ccb_h->path->bus->sim;
5420
5421         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5422                 KASSERT(sim, ("sim missing for CAM_RELEASE_SIMQ request"));
5423                 xpt_release_simq(sim, /*run_queue*/FALSE);
5424                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5425         }
5426
5427         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5428          && (ccb_h->status & CAM_DEV_QFRZN)) {
5429                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5430                 ccb_h->status &= ~CAM_DEV_QFRZN;
5431         }
5432
5433         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5434                 struct cam_ed *dev = ccb_h->path->device;
5435
5436                 if (sim)
5437                         devq = sim->devq;
5438                 KASSERT(devq, ("Periph disappeared with request pending."));
5439
5440                 mtx_lock(&devq->send_mtx);
5441                 devq->send_active--;
5442                 devq->send_openings++;
5443                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5444
5445                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5446                   && (dev->ccbq.dev_active == 0))) {
5447                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5448                         xpt_release_devq_device(dev, /*count*/1,
5449                                          /*run_queue*/FALSE);
5450                 }
5451
5452                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5453                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5454                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5455                         xpt_release_devq_device(dev, /*count*/1,
5456                                          /*run_queue*/FALSE);
5457                 }
5458
5459                 if (!device_is_queued(dev))
5460                         (void)xpt_schedule_devq(devq, dev);
5461                 xpt_run_devq(devq);
5462                 mtx_unlock(&devq->send_mtx);
5463
5464                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5465                         mtx = xpt_path_mtx(ccb_h->path);
5466                         mtx_lock(mtx);
5467
5468                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5469                          && (--dev->tag_delay_count == 0))
5470                                 xpt_start_tags(ccb_h->path);
5471                 }
5472         }
5473
5474         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5475                 if (mtx == NULL) {
5476                         mtx = xpt_path_mtx(ccb_h->path);
5477                         mtx_lock(mtx);
5478                 }
5479         } else {
5480                 if (mtx != NULL) {
5481                         mtx_unlock(mtx);
5482                         mtx = NULL;
5483                 }
5484         }
5485
5486         /* Call the peripheral driver's callback */
5487         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5488         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5489         if (mtx != NULL)
5490                 mtx_unlock(mtx);
5491 }
5492
5493 void
5494 xpt_done_td(void *arg)
5495 {
5496         struct cam_doneq *queue = arg;
5497         struct ccb_hdr *ccb_h;
5498         STAILQ_HEAD(, ccb_hdr)  doneq;
5499
5500         STAILQ_INIT(&doneq);
5501         mtx_lock(&queue->cam_doneq_mtx);
5502         while (1) {
5503                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5504                         queue->cam_doneq_sleep = 1;
5505                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5506                             PRIBIO, "-", 0);
5507                         queue->cam_doneq_sleep = 0;
5508                 }
5509                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5510                 mtx_unlock(&queue->cam_doneq_mtx);
5511
5512                 THREAD_NO_SLEEPING();
5513                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5514                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5515                         xpt_done_process(ccb_h);
5516                 }
5517                 THREAD_SLEEPING_OK();
5518
5519                 mtx_lock(&queue->cam_doneq_mtx);
5520         }
5521 }
5522
5523 static void
5524 camisr_runqueue(void)
5525 {
5526         struct  ccb_hdr *ccb_h;
5527         struct cam_doneq *queue;
5528         int i;
5529
5530         /* Process global queues. */
5531         for (i = 0; i < cam_num_doneqs; i++) {
5532                 queue = &cam_doneqs[i];
5533                 mtx_lock(&queue->cam_doneq_mtx);
5534                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5535                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5536                         mtx_unlock(&queue->cam_doneq_mtx);
5537                         xpt_done_process(ccb_h);
5538                         mtx_lock(&queue->cam_doneq_mtx);
5539                 }
5540                 mtx_unlock(&queue->cam_doneq_mtx);
5541         }
5542 }
5543
5544 struct kv
5545 {
5546         uint32_t v;
5547         const char *name;
5548 };
5549
5550 static struct kv map[] = {
5551         { XPT_NOOP, "XPT_NOOP" },
5552         { XPT_SCSI_IO, "XPT_SCSI_IO" },
5553         { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5554         { XPT_GDEVLIST, "XPT_GDEVLIST" },
5555         { XPT_PATH_INQ, "XPT_PATH_INQ" },
5556         { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5557         { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5558         { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5559         { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5560         { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5561         { XPT_DEBUG, "XPT_DEBUG" },
5562         { XPT_PATH_STATS, "XPT_PATH_STATS" },
5563         { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5564         { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5565         { XPT_ASYNC, "XPT_ASYNC" },
5566         { XPT_ABORT, "XPT_ABORT" },
5567         { XPT_RESET_BUS, "XPT_RESET_BUS" },
5568         { XPT_RESET_DEV, "XPT_RESET_DEV" },
5569         { XPT_TERM_IO, "XPT_TERM_IO" },
5570         { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5571         { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5572         { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5573         { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5574         { XPT_ATA_IO, "XPT_ATA_IO" },
5575         { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5576         { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5577         { XPT_NVME_IO, "XPT_NVME_IO" },
5578         { XPT_MMC_IO, "XPT_MMC_IO" },
5579         { XPT_SMP_IO, "XPT_SMP_IO" },
5580         { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5581         { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" },
5582         { XPT_ENG_INQ, "XPT_ENG_INQ" },
5583         { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5584         { XPT_EN_LUN, "XPT_EN_LUN" },
5585         { XPT_TARGET_IO, "XPT_TARGET_IO" },
5586         { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5587         { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5588         { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5589         { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5590         { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5591         { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5592         { 0, 0 }
5593 };
5594
5595 const char *
5596 xpt_action_name(uint32_t action)
5597 {
5598         static char buffer[32]; /* Only for unknown messages -- racy */
5599         struct kv *walker = map;
5600
5601         while (walker->name != NULL) {
5602                 if (walker->v == action)
5603                         return (walker->name);
5604                 walker++;
5605         }
5606
5607         snprintf(buffer, sizeof(buffer), "%#x", action);
5608         return (buffer);
5609 }