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