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_release_simq_timeout(void *arg) __unused;
 252 static void      xpt_acquire_bus(struct cam_eb *bus);
 253 static void      xpt_release_bus(struct cam_eb *bus);
 254 static uint32_t  xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
 255 static int       xpt_release_devq_device(struct cam_ed *dev, u_int count,
 256                     int run_queue);
 257 static struct cam_et*
 258                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 259 static void      xpt_acquire_target(struct cam_et *target);
 260 static void      xpt_release_target(struct cam_et *target);
 261 static struct cam_eb*
 262                  xpt_find_bus(path_id_t path_id);
 263 static struct cam_et*
 264                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 265 static struct cam_ed*
 266                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 267 static void      xpt_config(void *arg);
 268 static void      xpt_hold_boot_locked(void);
 269 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 270                                  u_int32_t new_priority);
 271 static xpt_devicefunc_t xptpassannouncefunc;
 272 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 273 static void      xptpoll(struct cam_sim *sim);
 274 static void      camisr_runqueue(void);
 275 static void      xpt_done_process(struct ccb_hdr *ccb_h);
 276 static void      xpt_done_td(void *);
 277 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 278                                     u_int num_patterns, struct cam_eb *bus);
 279 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 280                                        u_int num_patterns,
 281                                        struct cam_ed *device);
 282 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 283                                        u_int num_patterns,
 284                                        struct cam_periph *periph);
 285 static xpt_busfunc_t    xptedtbusfunc;
 286 static xpt_targetfunc_t xptedttargetfunc;
 287 static xpt_devicefunc_t xptedtdevicefunc;
 288 static xpt_periphfunc_t xptedtperiphfunc;
 289 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 290 static xpt_periphfunc_t xptplistperiphfunc;
 291 static int              xptedtmatch(struct ccb_dev_match *cdm);
 292 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 293 static int              xptbustraverse(struct cam_eb *start_bus,
 294                                        xpt_busfunc_t *tr_func, void *arg);
 295 static int              xpttargettraverse(struct cam_eb *bus,
 296                                           struct cam_et *start_target,
 297                                           xpt_targetfunc_t *tr_func, void *arg);
 298 static int              xptdevicetraverse(struct cam_et *target,
 299                                           struct cam_ed *start_device,
 300                                           xpt_devicefunc_t *tr_func, void *arg);
 301 static int              xptperiphtraverse(struct cam_ed *device,
 302                                           struct cam_periph *start_periph,
 303                                           xpt_periphfunc_t *tr_func, void *arg);
 304 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 305                                         xpt_pdrvfunc_t *tr_func, void *arg);
 306 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 307                                             struct cam_periph *start_periph,
 308                                             xpt_periphfunc_t *tr_func,
 309                                             void *arg);
 310 static xpt_busfunc_t    xptdefbusfunc;
 311 static xpt_targetfunc_t xptdeftargetfunc;
 312 static xpt_devicefunc_t xptdefdevicefunc;
 313 static xpt_periphfunc_t xptdefperiphfunc;
 314 static void             xpt_finishconfig_task(void *context, int pending);
 315 static void             xpt_dev_async_default(u_int32_t async_code,
 316                                               struct cam_eb *bus,
 317                                               struct cam_et *target,
 318                                               struct cam_ed *device,
 319                                               void *async_arg);
 320 static struct cam_ed *  xpt_alloc_device_default(struct cam_eb *bus,
 321                                                  struct cam_et *target,
 322                                                  lun_id_t lun_id);
 323 static xpt_devicefunc_t xptsetasyncfunc;
 324 static xpt_busfunc_t    xptsetasyncbusfunc;
 325 static cam_status       xptregister(struct cam_periph *periph,
 326                                     void *arg);
 327 static __inline int device_is_queued(struct cam_ed *device);
 328
 329 static __inline int
 330 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 331 {
 332         int     retval;
 333
 334         mtx_assert(&devq->send_mtx, MA_OWNED);
 335         if ((dev->ccbq.queue.entries > 0) &&
 336             (dev->ccbq.dev_openings > 0) &&
 337             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 338                 /*
 339                  * The priority of a device waiting for controller
 340                  * resources is that of the highest priority CCB
 341                  * enqueued.
 342                  */
 343                 retval =
 344                     xpt_schedule_dev(&devq->send_queue,
 345                                      &dev->devq_entry,
 346                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 347         } else {
 348                 retval = 0;
 349         }
 350         return (retval);
 351 }
 352
 353 static __inline int
 354 device_is_queued(struct cam_ed *device)
 355 {
 356         return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
 357 }
 358
 359 static void
 360 xpt_periph_init()
 361 {
 362         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 363 }
 364
 365 static int
 366 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 367 {
 368
 369         /*
 370          * Only allow read-write access.
 371          */
 372         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 373                 return(EPERM);
 374
 375         /*
 376          * We don't allow nonblocking access.
 377          */
 378         if ((flags & O_NONBLOCK) != 0) {
 379                 printf("%s: can't do nonblocking access\n", devtoname(dev));
 380                 return(ENODEV);
 381         }
 382
 383         return(0);
 384 }
 385
 386 static int
 387 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 388 {
 389
 390         return(0);
 391 }
 392
 393 /*
 394  * Don't automatically grab the xpt softc lock here even though this is going
 395  * through the xpt device.  The xpt device is really just a back door for
 396  * accessing other devices and SIMs, so the right thing to do is to grab
 397  * the appropriate SIM lock once the bus/SIM is located.
 398  */
 399 static int
 400 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 401 {
 402         int error;
 403
 404         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 405                 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
 406         }
 407         return (error);
 408 }
 409
 410 static int
 411 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 412 {
 413         int error;
 414
 415         error = 0;
 416
 417         switch(cmd) {
 418         /*
 419          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 420          * to accept CCB types that don't quite make sense to send through a
 421          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 422          * in the CAM spec.
 423          */
 424         case CAMIOCOMMAND: {
 425                 union ccb *ccb;
 426                 union ccb *inccb;
 427                 struct cam_eb *bus;
 428
 429                 inccb = (union ccb *)addr;
 430 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 431                 if (inccb->ccb_h.func_code == XPT_SCSI_IO)
 432                         inccb->csio.bio = NULL;
 433 #endif
 434
 435                 if (inccb->ccb_h.flags & CAM_UNLOCKED)
 436                         return (EINVAL);
 437
 438                 bus = xpt_find_bus(inccb->ccb_h.path_id);
 439                 if (bus == NULL)
 440                         return (EINVAL);
 441
 442                 switch (inccb->ccb_h.func_code) {
 443                 case XPT_SCAN_BUS:
 444                 case XPT_RESET_BUS:
 445                         if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
 446                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 447                                 xpt_release_bus(bus);
 448                                 return (EINVAL);
 449                         }
 450                         break;
 451                 case XPT_SCAN_TGT:
 452                         if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
 453                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 454                                 xpt_release_bus(bus);
 455                                 return (EINVAL);
 456                         }
 457                         break;
 458                 default:
 459                         break;
 460                 }
 461
 462                 switch(inccb->ccb_h.func_code) {
 463                 case XPT_SCAN_BUS:
 464                 case XPT_RESET_BUS:
 465                 case XPT_PATH_INQ:
 466                 case XPT_ENG_INQ:
 467                 case XPT_SCAN_LUN:
 468                 case XPT_SCAN_TGT:
 469
 470                         ccb = xpt_alloc_ccb();
 471
 472                         /*
 473                          * Create a path using the bus, target, and lun the
 474                          * user passed in.
 475                          */
 476                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 477                                             inccb->ccb_h.path_id,
 478                                             inccb->ccb_h.target_id,
 479                                             inccb->ccb_h.target_lun) !=
 480                                             CAM_REQ_CMP){
 481                                 error = EINVAL;
 482                                 xpt_free_ccb(ccb);
 483                                 break;
 484                         }
 485                         /* Ensure all of our fields are correct */
 486                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 487                                       inccb->ccb_h.pinfo.priority);
 488                         xpt_merge_ccb(ccb, inccb);
 489                         xpt_path_lock(ccb->ccb_h.path);
 490                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 491                         xpt_path_unlock(ccb->ccb_h.path);
 492                         bcopy(ccb, inccb, sizeof(union ccb));
 493                         xpt_free_path(ccb->ccb_h.path);
 494                         xpt_free_ccb(ccb);
 495                         break;
 496
 497                 case XPT_DEBUG: {
 498                         union ccb ccb;
 499
 500                         /*
 501                          * This is an immediate CCB, so it's okay to
 502                          * allocate it on the stack.
 503                          */
 504
 505                         /*
 506                          * Create a path using the bus, target, and lun the
 507                          * user passed in.
 508                          */
 509                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 510                                             inccb->ccb_h.path_id,
 511                                             inccb->ccb_h.target_id,
 512                                             inccb->ccb_h.target_lun) !=
 513                                             CAM_REQ_CMP){
 514                                 error = EINVAL;
 515                                 break;
 516                         }
 517                         /* Ensure all of our fields are correct */
 518                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 519                                       inccb->ccb_h.pinfo.priority);
 520                         xpt_merge_ccb(&ccb, inccb);
 521                         xpt_action(&ccb);
 522                         bcopy(&ccb, inccb, sizeof(union ccb));
 523                         xpt_free_path(ccb.ccb_h.path);
 524                         break;
 525
 526                 }
 527                 case XPT_DEV_MATCH: {
 528                         struct cam_periph_map_info mapinfo;
 529                         struct cam_path *old_path;
 530
 531                         /*
 532                          * We can't deal with physical addresses for this
 533                          * type of transaction.
 534                          */
 535                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 536                             CAM_DATA_VADDR) {
 537                                 error = EINVAL;
 538                                 break;
 539                         }
 540
 541                         /*
 542                          * Save this in case the caller had it set to
 543                          * something in particular.
 544                          */
 545                         old_path = inccb->ccb_h.path;
 546
 547                         /*
 548                          * We really don't need a path for the matching
 549                          * code.  The path is needed because of the
 550                          * debugging statements in xpt_action().  They
 551                          * assume that the CCB has a valid path.
 552                          */
 553                         inccb->ccb_h.path = xpt_periph->path;
 554
 555                         bzero(&mapinfo, sizeof(mapinfo));
 556
 557                         /*
 558                          * Map the pattern and match buffers into kernel
 559                          * virtual address space.
 560                          */
 561                         error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS);
 562
 563                         if (error) {
 564                                 inccb->ccb_h.path = old_path;
 565                                 break;
 566                         }
 567
 568                         /*
 569                          * This is an immediate CCB, we can send it on directly.
 570                          */
 571                         xpt_action(inccb);
 572
 573                         /*
 574                          * Map the buffers back into user space.
 575                          */
 576                         cam_periph_unmapmem(inccb, &mapinfo);
 577
 578                         inccb->ccb_h.path = old_path;
 579
 580                         error = 0;
 581                         break;
 582                 }
 583                 default:
 584                         error = ENOTSUP;
 585                         break;
 586                 }
 587                 xpt_release_bus(bus);
 588                 break;
 589         }
 590         /*
 591          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 592          * with the periphal driver name and unit name filled in.  The other
 593          * fields don't really matter as input.  The passthrough driver name
 594          * ("pass"), and unit number are passed back in the ccb.  The current
 595          * device generation number, and the index into the device peripheral
 596          * driver list, and the status are also passed back.  Note that
 597          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 598          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 599          * (or rather should be) impossible for the device peripheral driver
 600          * list to change since we look at the whole thing in one pass, and
 601          * we do it with lock protection.
 602          *
 603          */
 604         case CAMGETPASSTHRU: {
 605                 union ccb *ccb;
 606                 struct cam_periph *periph;
 607                 struct periph_driver **p_drv;
 608                 char   *name;
 609                 u_int unit;
 610                 int base_periph_found;
 611
 612                 ccb = (union ccb *)addr;
 613                 unit = ccb->cgdl.unit_number;
 614                 name = ccb->cgdl.periph_name;
 615                 base_periph_found = 0;
 616 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 617                 if (ccb->ccb_h.func_code == XPT_SCSI_IO)
 618                         ccb->csio.bio = NULL;
 619 #endif
 620
 621                 /*
 622                  * Sanity check -- make sure we don't get a null peripheral
 623                  * driver name.
 624                  */
 625                 if (*ccb->cgdl.periph_name == '\0') {
 626                         error = EINVAL;
 627                         break;
 628                 }
 629
 630                 /* Keep the list from changing while we traverse it */
 631                 xpt_lock_buses();
 632
 633                 /* first find our driver in the list of drivers */
 634                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 635                         if (strcmp((*p_drv)->driver_name, name) == 0)
 636                                 break;
 637
 638                 if (*p_drv == NULL) {
 639                         xpt_unlock_buses();
 640                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 641                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 642                         *ccb->cgdl.periph_name = '\0';
 643                         ccb->cgdl.unit_number = 0;
 644                         error = ENOENT;
 645                         break;
 646                 }
 647
 648                 /*
 649                  * Run through every peripheral instance of this driver
 650                  * and check to see whether it matches the unit passed
 651                  * in by the user.  If it does, get out of the loops and
 652                  * find the passthrough driver associated with that
 653                  * peripheral driver.
 654                  */
 655                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 656                      periph = TAILQ_NEXT(periph, unit_links)) {
 657
 658                         if (periph->unit_number == unit)
 659                                 break;
 660                 }
 661                 /*
 662                  * If we found the peripheral driver that the user passed
 663                  * in, go through all of the peripheral drivers for that
 664                  * particular device and look for a passthrough driver.
 665                  */
 666                 if (periph != NULL) {
 667                         struct cam_ed *device;
 668                         int i;
 669
 670                         base_periph_found = 1;
 671                         device = periph->path->device;
 672                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 673                              periph != NULL;
 674                              periph = SLIST_NEXT(periph, periph_links), i++) {
 675                                 /*
 676                                  * Check to see whether we have a
 677                                  * passthrough device or not.
 678                                  */
 679                                 if (strcmp(periph->periph_name, "pass") == 0) {
 680                                         /*
 681                                          * Fill in the getdevlist fields.
 682                                          */
 683                                         strlcpy(ccb->cgdl.periph_name,
 684                                                periph->periph_name,
 685                                                sizeof(ccb->cgdl.periph_name));
 686                                         ccb->cgdl.unit_number =
 687                                                 periph->unit_number;
 688                                         if (SLIST_NEXT(periph, periph_links))
 689                                                 ccb->cgdl.status =
 690                                                         CAM_GDEVLIST_MORE_DEVS;
 691                                         else
 692                                                 ccb->cgdl.status =
 693                                                        CAM_GDEVLIST_LAST_DEVICE;
 694                                         ccb->cgdl.generation =
 695                                                 device->generation;
 696                                         ccb->cgdl.index = i;
 697                                         /*
 698                                          * Fill in some CCB header fields
 699                                          * that the user may want.
 700                                          */
 701                                         ccb->ccb_h.path_id =
 702                                                 periph->path->bus->path_id;
 703                                         ccb->ccb_h.target_id =
 704                                                 periph->path->target->target_id;
 705                                         ccb->ccb_h.target_lun =
 706                                                 periph->path->device->lun_id;
 707                                         ccb->ccb_h.status = CAM_REQ_CMP;
 708                                         break;
 709                                 }
 710                         }
 711                 }
 712
 713                 /*
 714                  * If the periph is null here, one of two things has
 715                  * happened.  The first possibility is that we couldn't
 716                  * find the unit number of the particular peripheral driver
 717                  * that the user is asking about.  e.g. the user asks for
 718                  * the passthrough driver for "da11".  We find the list of
 719                  * "da" peripherals all right, but there is no unit 11.
 720                  * The other possibility is that we went through the list
 721                  * of peripheral drivers attached to the device structure,
 722                  * but didn't find one with the name "pass".  Either way,
 723                  * we return ENOENT, since we couldn't find something.
 724                  */
 725                 if (periph == NULL) {
 726                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 727                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 728                         *ccb->cgdl.periph_name = '\0';
 729                         ccb->cgdl.unit_number = 0;
 730                         error = ENOENT;
 731                         /*
 732                          * It is unfortunate that this is even necessary,
 733                          * but there are many, many clueless users out there.
 734                          * If this is true, the user is looking for the
 735                          * passthrough driver, but doesn't have one in his
 736                          * kernel.
 737                          */
 738                         if (base_periph_found == 1) {
 739                                 printf("xptioctl: pass driver is not in the "
 740                                        "kernel\n");
 741                                 printf("xptioctl: put \"device pass\" in "
 742                                        "your kernel config file\n");
 743                         }
 744                 }
 745                 xpt_unlock_buses();
 746                 break;
 747                 }
 748         default:
 749                 error = ENOTTY;
 750                 break;
 751         }
 752
 753         return(error);
 754 }
 755
 756 static int
 757 cam_module_event_handler(module_t mod, int what, void *arg)
 758 {
 759         int error;
 760
 761         switch (what) {
 762         case MOD_LOAD:
 763                 if ((error = xpt_init(NULL)) != 0)
 764                         return (error);
 765                 break;
 766         case MOD_UNLOAD:
 767                 return EBUSY;
 768         default:
 769                 return EOPNOTSUPP;
 770         }
 771
 772         return 0;
 773 }
 774
 775 static struct xpt_proto *
 776 xpt_proto_find(cam_proto proto)
 777 {
 778         struct xpt_proto **pp;
 779
 780         SET_FOREACH(pp, cam_xpt_proto_set) {
 781                 if ((*pp)->proto == proto)
 782                         return *pp;
 783         }
 784
 785         return NULL;
 786 }
 787
 788 static void
 789 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 790 {
 791
 792         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 793                 xpt_free_path(done_ccb->ccb_h.path);
 794                 xpt_free_ccb(done_ccb);
 795         } else {
 796                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 797                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 798         }
 799         xpt_release_boot();
 800 }
 801
 802 /* thread to handle bus rescans */
 803 static void
 804 xpt_scanner_thread(void *dummy)
 805 {
 806         union ccb       *ccb;
 807         struct cam_path  path;
 808
 809         xpt_lock_buses();
 810         for (;;) {
 811                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 812                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 813                                "-", 0);
 814                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 815                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 816                         xpt_unlock_buses();
 817
 818                         /*
 819                          * Since lock can be dropped inside and path freed
 820                          * by completion callback even before return here,
 821                          * take our own path copy for reference.
 822                          */
 823                         xpt_copy_path(&path, ccb->ccb_h.path);
 824                         xpt_path_lock(&path);
 825                         xpt_action(ccb);
 826                         xpt_path_unlock(&path);
 827                         xpt_release_path(&path);
 828
 829                         xpt_lock_buses();
 830                 }
 831         }
 832 }
 833
 834 void
 835 xpt_rescan(union ccb *ccb)
 836 {
 837         struct ccb_hdr *hdr;
 838
 839         /* Prepare request */
 840         if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
 841             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 842                 ccb->ccb_h.func_code = XPT_SCAN_BUS;
 843         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 844             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 845                 ccb->ccb_h.func_code = XPT_SCAN_TGT;
 846         else 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_LUN;
 849         else {
 850                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 851                 xpt_free_path(ccb->ccb_h.path);
 852                 xpt_free_ccb(ccb);
 853                 return;
 854         }
 855         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
 856             ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code,
 857                 xpt_action_name(ccb->ccb_h.func_code)));
 858
 859         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 860         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 861         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 862         /* Don't make duplicate entries for the same paths. */
 863         xpt_lock_buses();
 864         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 865                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 866                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 867                                 wakeup(&xsoftc.ccb_scanq);
 868                                 xpt_unlock_buses();
 869                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 870                                 xpt_free_path(ccb->ccb_h.path);
 871                                 xpt_free_ccb(ccb);
 872                                 return;
 873                         }
 874                 }
 875         }
 876         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 877         xpt_hold_boot_locked();
 878         wakeup(&xsoftc.ccb_scanq);
 879         xpt_unlock_buses();
 880 }
 881
 882 /* Functions accessed by the peripheral drivers */
 883 static int
 884 xpt_init(void *dummy)
 885 {
 886         struct cam_sim *xpt_sim;
 887         struct cam_path *path;
 888         struct cam_devq *devq;
 889         cam_status status;
 890         int error, i;
 891
 892         TAILQ_INIT(&xsoftc.xpt_busses);
 893         TAILQ_INIT(&xsoftc.ccb_scanq);
 894         STAILQ_INIT(&xsoftc.highpowerq);
 895         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 896
 897         mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
 898         xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
 899             taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
 900
 901 #ifdef CAM_BOOT_DELAY
 902         /*
 903          * Override this value at compile time to assist our users
 904          * who don't use loader to boot a kernel.
 905          */
 906         xsoftc.boot_delay = CAM_BOOT_DELAY;
 907 #endif
 908
 909         /*
 910          * The xpt layer is, itself, the equivalent of a SIM.
 911          * Allow 16 ccbs in the ccb pool for it.  This should
 912          * give decent parallelism when we probe buses and
 913          * perform other XPT functions.
 914          */
 915         devq = cam_simq_alloc(16);
 916         xpt_sim = cam_sim_alloc(xptaction,
 917                                 xptpoll,
 918                                 "xpt",
 919                                 /*softc*/NULL,
 920                                 /*unit*/0,
 921                                 /*mtx*/NULL,
 922                                 /*max_dev_transactions*/0,
 923                                 /*max_tagged_dev_transactions*/0,
 924                                 devq);
 925         if (xpt_sim == NULL)
 926                 return (ENOMEM);
 927
 928         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 929                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 930                        " failing attach\n", status);
 931                 return (EINVAL);
 932         }
 933
 934         /*
 935          * Looking at the XPT from the SIM layer, the XPT is
 936          * the equivalent of a peripheral driver.  Allocate
 937          * a peripheral driver entry for us.
 938          */
 939         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 940                                       CAM_TARGET_WILDCARD,
 941                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 942                 printf("xpt_init: xpt_create_path failed with status %#x,"
 943                        " failing attach\n", status);
 944                 return (EINVAL);
 945         }
 946         xpt_path_lock(path);
 947         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 948                          path, NULL, 0, xpt_sim);
 949         xpt_path_unlock(path);
 950         xpt_free_path(path);
 951
 952         if (cam_num_doneqs < 1)
 953                 cam_num_doneqs = 1 + mp_ncpus / 6;
 954         else if (cam_num_doneqs > MAXCPU)
 955                 cam_num_doneqs = MAXCPU;
 956         for (i = 0; i < cam_num_doneqs; i++) {
 957                 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 958                     MTX_DEF);
 959                 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
 960                 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 961                     &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 962                 if (error != 0) {
 963                         cam_num_doneqs = i;
 964                         break;
 965                 }
 966         }
 967         if (cam_num_doneqs < 1) {
 968                 printf("xpt_init: Cannot init completion queues "
 969                        "- failing attach\n");
 970                 return (ENOMEM);
 971         }
 972
 973         /*
 974          * Register a callback for when interrupts are enabled.
 975          */
 976         config_intrhook_oneshot(xpt_config, NULL);
 977
 978         return (0);
 979 }
 980
 981 static cam_status
 982 xptregister(struct cam_periph *periph, void *arg)
 983 {
 984         struct cam_sim *xpt_sim;
 985
 986         if (periph == NULL) {
 987                 printf("xptregister: periph was NULL!!\n");
 988                 return(CAM_REQ_CMP_ERR);
 989         }
 990
 991         xpt_sim = (struct cam_sim *)arg;
 992         xpt_sim->softc = periph;
 993         xpt_periph = periph;
 994         periph->softc = NULL;
 995
 996         return(CAM_REQ_CMP);
 997 }
 998
 999 int32_t
1000 xpt_add_periph(struct cam_periph *periph)
1001 {
1002         struct cam_ed *device;
1003         int32_t  status;
1004
1005         TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
1006         device = periph->path->device;
1007         status = CAM_REQ_CMP;
1008         if (device != NULL) {
1009                 mtx_lock(&device->target->bus->eb_mtx);
1010                 device->generation++;
1011                 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
1012                 mtx_unlock(&device->target->bus->eb_mtx);
1013                 atomic_add_32(&xsoftc.xpt_generation, 1);
1014         }
1015
1016         return (status);
1017 }
1018
1019 void
1020 xpt_remove_periph(struct cam_periph *periph)
1021 {
1022         struct cam_ed *device;
1023
1024         device = periph->path->device;
1025         if (device != NULL) {
1026                 mtx_lock(&device->target->bus->eb_mtx);
1027                 device->generation++;
1028                 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1029                 mtx_unlock(&device->target->bus->eb_mtx);
1030                 atomic_add_32(&xsoftc.xpt_generation, 1);
1031         }
1032 }
1033
1034
1035 void
1036 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1037 {
1038         struct  cam_path *path = periph->path;
1039         struct  xpt_proto *proto;
1040
1041         cam_periph_assert(periph, MA_OWNED);
1042         periph->flags |= CAM_PERIPH_ANNOUNCED;
1043
1044         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1045                periph->periph_name, periph->unit_number,
1046                path->bus->sim->sim_name,
1047                path->bus->sim->unit_number,
1048                path->bus->sim->bus_id,
1049                path->bus->path_id,
1050                path->target->target_id,
1051                (uintmax_t)path->device->lun_id);
1052         printf("%s%d: ", periph->periph_name, periph->unit_number);
1053         proto = xpt_proto_find(path->device->protocol);
1054         if (proto)
1055                 proto->ops->announce(path->device);
1056         else
1057                 printf("%s%d: Unknown protocol device %d\n",
1058                     periph->periph_name, periph->unit_number,
1059                     path->device->protocol);
1060         if (path->device->serial_num_len > 0) {
1061                 /* Don't wrap the screen  - print only the first 60 chars */
1062                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1063                        periph->unit_number, path->device->serial_num);
1064         }
1065         /* Announce transport details. */
1066         path->bus->xport->ops->announce(periph);
1067         /* Announce command queueing. */
1068         if (path->device->inq_flags & SID_CmdQue
1069          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1070                 printf("%s%d: Command Queueing enabled\n",
1071                        periph->periph_name, periph->unit_number);
1072         }
1073         /* Announce caller's details if they've passed in. */
1074         if (announce_string != NULL)
1075                 printf("%s%d: %s\n", periph->periph_name,
1076                        periph->unit_number, announce_string);
1077 }
1078
1079 void
1080 xpt_announce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb,
1081     char *announce_string)
1082 {
1083         struct  cam_path *path = periph->path;
1084         struct  xpt_proto *proto;
1085
1086         cam_periph_assert(periph, MA_OWNED);
1087         periph->flags |= CAM_PERIPH_ANNOUNCED;
1088
1089         /* Fall back to the non-sbuf method if necessary */
1090         if (xsoftc.announce_nosbuf != 0) {
1091                 xpt_announce_periph(periph, announce_string);
1092                 return;
1093         }
1094         proto = xpt_proto_find(path->device->protocol);
1095         if (((proto != NULL) && (proto->ops->announce_sbuf == NULL)) ||
1096             (path->bus->xport->ops->announce_sbuf == NULL)) {
1097                 xpt_announce_periph(periph, announce_string);
1098                 return;
1099         }
1100
1101         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1102             periph->periph_name, periph->unit_number,
1103             path->bus->sim->sim_name,
1104             path->bus->sim->unit_number,
1105             path->bus->sim->bus_id,
1106             path->bus->path_id,
1107             path->target->target_id,
1108             (uintmax_t)path->device->lun_id);
1109         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1110
1111         if (proto)
1112                 proto->ops->announce_sbuf(path->device, sb);
1113         else
1114                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1115                     periph->periph_name, periph->unit_number,
1116                     path->device->protocol);
1117         if (path->device->serial_num_len > 0) {
1118                 /* Don't wrap the screen  - print only the first 60 chars */
1119                 sbuf_printf(sb, "%s%d: Serial Number %.60s\n",
1120                     periph->periph_name, periph->unit_number,
1121                     path->device->serial_num);
1122         }
1123         /* Announce transport details. */
1124         path->bus->xport->ops->announce_sbuf(periph, sb);
1125         /* Announce command queueing. */
1126         if (path->device->inq_flags & SID_CmdQue
1127          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1128                 sbuf_printf(sb, "%s%d: Command Queueing enabled\n",
1129                     periph->periph_name, periph->unit_number);
1130         }
1131         /* Announce caller's details if they've passed in. */
1132         if (announce_string != NULL)
1133                 sbuf_printf(sb, "%s%d: %s\n", periph->periph_name,
1134                     periph->unit_number, announce_string);
1135 }
1136
1137 void
1138 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1139 {
1140         if (quirks != 0) {
1141                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1142                     periph->unit_number, quirks, bit_string);
1143         }
1144 }
1145
1146 void
1147 xpt_announce_quirks_sbuf(struct cam_periph *periph, struct sbuf *sb,
1148                          int quirks, char *bit_string)
1149 {
1150         if (xsoftc.announce_nosbuf != 0) {
1151                 xpt_announce_quirks(periph, quirks, bit_string);
1152                 return;
1153         }
1154
1155         if (quirks != 0) {
1156                 sbuf_printf(sb, "%s%d: quirks=0x%b\n", periph->periph_name,
1157                     periph->unit_number, quirks, bit_string);
1158         }
1159 }
1160
1161 void
1162 xpt_denounce_periph(struct cam_periph *periph)
1163 {
1164         struct  cam_path *path = periph->path;
1165         struct  xpt_proto *proto;
1166
1167         cam_periph_assert(periph, MA_OWNED);
1168         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1169                periph->periph_name, periph->unit_number,
1170                path->bus->sim->sim_name,
1171                path->bus->sim->unit_number,
1172                path->bus->sim->bus_id,
1173                path->bus->path_id,
1174                path->target->target_id,
1175                (uintmax_t)path->device->lun_id);
1176         printf("%s%d: ", periph->periph_name, periph->unit_number);
1177         proto = xpt_proto_find(path->device->protocol);
1178         if (proto)
1179                 proto->ops->denounce(path->device);
1180         else
1181                 printf("%s%d: Unknown protocol device %d\n",
1182                     periph->periph_name, periph->unit_number,
1183                     path->device->protocol);
1184         if (path->device->serial_num_len > 0)
1185                 printf(" s/n %.60s", path->device->serial_num);
1186         printf(" detached\n");
1187 }
1188
1189 void
1190 xpt_denounce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb)
1191 {
1192         struct cam_path *path = periph->path;
1193         struct xpt_proto *proto;
1194
1195         cam_periph_assert(periph, MA_OWNED);
1196
1197         /* Fall back to the non-sbuf method if necessary */
1198         if (xsoftc.announce_nosbuf != 0) {
1199                 xpt_denounce_periph(periph);
1200                 return;
1201         }
1202         proto = xpt_proto_find(path->device->protocol);
1203         if ((proto != NULL) && (proto->ops->denounce_sbuf == NULL)) {
1204                 xpt_denounce_periph(periph);
1205                 return;
1206         }
1207
1208         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1209             periph->periph_name, periph->unit_number,
1210             path->bus->sim->sim_name,
1211             path->bus->sim->unit_number,
1212             path->bus->sim->bus_id,
1213             path->bus->path_id,
1214             path->target->target_id,
1215             (uintmax_t)path->device->lun_id);
1216         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1217
1218         if (proto)
1219                 proto->ops->denounce_sbuf(path->device, sb);
1220         else
1221                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1222                     periph->periph_name, periph->unit_number,
1223                     path->device->protocol);
1224         if (path->device->serial_num_len > 0)
1225                 sbuf_printf(sb, " s/n %.60s", path->device->serial_num);
1226         sbuf_printf(sb, " detached\n");
1227 }
1228
1229 int
1230 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1231 {
1232         int ret = -1, l, o;
1233         struct ccb_dev_advinfo cdai;
1234         struct scsi_vpd_device_id *did;
1235         struct scsi_vpd_id_descriptor *idd;
1236
1237         xpt_path_assert(path, MA_OWNED);
1238
1239         memset(&cdai, 0, sizeof(cdai));
1240         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1241         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1242         cdai.flags = CDAI_FLAG_NONE;
1243         cdai.bufsiz = len;
1244         cdai.buf = buf;
1245
1246         if (!strcmp(attr, "GEOM::ident"))
1247                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1248         else if (!strcmp(attr, "GEOM::physpath"))
1249                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1250         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1251                  strcmp(attr, "GEOM::lunname") == 0) {
1252                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1253                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1254                 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT);
1255                 if (cdai.buf == NULL) {
1256                         ret = ENOMEM;
1257                         goto out;
1258                 }
1259         } else
1260                 goto out;
1261
1262         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1263         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1264                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1265         if (cdai.provsiz == 0)
1266                 goto out;
1267         switch(cdai.buftype) {
1268         case CDAI_TYPE_SCSI_DEVID:
1269                 did = (struct scsi_vpd_device_id *)cdai.buf;
1270                 if (strcmp(attr, "GEOM::lunid") == 0) {
1271                         idd = scsi_get_devid(did, cdai.provsiz,
1272                             scsi_devid_is_lun_naa);
1273                         if (idd == NULL)
1274                                 idd = scsi_get_devid(did, cdai.provsiz,
1275                                     scsi_devid_is_lun_eui64);
1276                         if (idd == NULL)
1277                                 idd = scsi_get_devid(did, cdai.provsiz,
1278                                     scsi_devid_is_lun_uuid);
1279                         if (idd == NULL)
1280                                 idd = scsi_get_devid(did, cdai.provsiz,
1281                                     scsi_devid_is_lun_md5);
1282                 } else
1283                         idd = NULL;
1284
1285                 if (idd == NULL)
1286                         idd = scsi_get_devid(did, cdai.provsiz,
1287                             scsi_devid_is_lun_t10);
1288                 if (idd == NULL)
1289                         idd = scsi_get_devid(did, cdai.provsiz,
1290                             scsi_devid_is_lun_name);
1291                 if (idd == NULL)
1292                         break;
1293
1294                 ret = 0;
1295                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) ==
1296                     SVPD_ID_CODESET_ASCII) {
1297                         if (idd->length < len) {
1298                                 for (l = 0; l < idd->length; l++)
1299                                         buf[l] = idd->identifier[l] ?
1300                                             idd->identifier[l] : ' ';
1301                                 buf[l] = 0;
1302                         } else
1303                                 ret = EFAULT;
1304                         break;
1305                 }
1306                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) ==
1307                     SVPD_ID_CODESET_UTF8) {
1308                         l = strnlen(idd->identifier, idd->length);
1309                         if (l < len) {
1310                                 bcopy(idd->identifier, buf, l);
1311                                 buf[l] = 0;
1312                         } else
1313                                 ret = EFAULT;
1314                         break;
1315                 }
1316                 if ((idd->id_type & SVPD_ID_TYPE_MASK) ==
1317                     SVPD_ID_TYPE_UUID && idd->identifier[0] == 0x10) {
1318                         if ((idd->length - 2) * 2 + 4 >= len) {
1319                                 ret = EFAULT;
1320                                 break;
1321                         }
1322                         for (l = 2, o = 0; l < idd->length; l++) {
1323                                 if (l == 6 || l == 8 || l == 10 || l == 12)
1324                                     o += sprintf(buf + o, "-");
1325                                 o += sprintf(buf + o, "%02x",
1326                                     idd->identifier[l]);
1327                         }
1328                         break;
1329                 }
1330                 if (idd->length * 2 < len) {
1331                         for (l = 0; l < idd->length; l++)
1332                                 sprintf(buf + l * 2, "%02x",
1333                                     idd->identifier[l]);
1334                 } else
1335                                 ret = EFAULT;
1336                 break;
1337         default:
1338                 if (cdai.provsiz < len) {
1339                         cdai.buf[cdai.provsiz] = 0;
1340                         ret = 0;
1341                 } else
1342                         ret = EFAULT;
1343                 break;
1344         }
1345
1346 out:
1347         if ((char *)cdai.buf != buf)
1348                 free(cdai.buf, M_CAMXPT);
1349         return ret;
1350 }
1351
1352 static dev_match_ret
1353 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1354             struct cam_eb *bus)
1355 {
1356         dev_match_ret retval;
1357         u_int i;
1358
1359         retval = DM_RET_NONE;
1360
1361         /*
1362          * If we aren't given something to match against, that's an error.
1363          */
1364         if (bus == NULL)
1365                 return(DM_RET_ERROR);
1366
1367         /*
1368          * If there are no match entries, then this bus matches no
1369          * matter what.
1370          */
1371         if ((patterns == NULL) || (num_patterns == 0))
1372                 return(DM_RET_DESCEND | DM_RET_COPY);
1373
1374         for (i = 0; i < num_patterns; i++) {
1375                 struct bus_match_pattern *cur_pattern;
1376
1377                 /*
1378                  * If the pattern in question isn't for a bus node, we
1379                  * aren't interested.  However, we do indicate to the
1380                  * calling routine that we should continue descending the
1381                  * tree, since the user wants to match against lower-level
1382                  * EDT elements.
1383                  */
1384                 if (patterns[i].type != DEV_MATCH_BUS) {
1385                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1386                                 retval |= DM_RET_DESCEND;
1387                         continue;
1388                 }
1389
1390                 cur_pattern = &patterns[i].pattern.bus_pattern;
1391
1392                 /*
1393                  * If they want to match any bus node, we give them any
1394                  * device node.
1395                  */
1396                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1397                         /* set the copy flag */
1398                         retval |= DM_RET_COPY;
1399
1400                         /*
1401                          * If we've already decided on an action, go ahead
1402                          * and return.
1403                          */
1404                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1405                                 return(retval);
1406                 }
1407
1408                 /*
1409                  * Not sure why someone would do this...
1410                  */
1411                 if (cur_pattern->flags == BUS_MATCH_NONE)
1412                         continue;
1413
1414                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1415                  && (cur_pattern->path_id != bus->path_id))
1416                         continue;
1417
1418                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1419                  && (cur_pattern->bus_id != bus->sim->bus_id))
1420                         continue;
1421
1422                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1423                  && (cur_pattern->unit_number != bus->sim->unit_number))
1424                         continue;
1425
1426                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1427                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1428                              DEV_IDLEN) != 0))
1429                         continue;
1430
1431                 /*
1432                  * If we get to this point, the user definitely wants
1433                  * information on this bus.  So tell the caller to copy the
1434                  * data out.
1435                  */
1436                 retval |= DM_RET_COPY;
1437
1438                 /*
1439                  * If the return action has been set to descend, then we
1440                  * know that we've already seen a non-bus matching
1441                  * expression, therefore we need to further descend the tree.
1442                  * This won't change by continuing around the loop, so we
1443                  * go ahead and return.  If we haven't seen a non-bus
1444                  * matching expression, we keep going around the loop until
1445                  * we exhaust the matching expressions.  We'll set the stop
1446                  * flag once we fall out of the loop.
1447                  */
1448                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1449                         return(retval);
1450         }
1451
1452         /*
1453          * If the return action hasn't been set to descend yet, that means
1454          * we haven't seen anything other than bus matching patterns.  So
1455          * tell the caller to stop descending the tree -- the user doesn't
1456          * want to match against lower level tree elements.
1457          */
1458         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1459                 retval |= DM_RET_STOP;
1460
1461         return(retval);
1462 }
1463
1464 static dev_match_ret
1465 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1466                struct cam_ed *device)
1467 {
1468         dev_match_ret retval;
1469         u_int i;
1470
1471         retval = DM_RET_NONE;
1472
1473         /*
1474          * If we aren't given something to match against, that's an error.
1475          */
1476         if (device == NULL)
1477                 return(DM_RET_ERROR);
1478
1479         /*
1480          * If there are no match entries, then this device matches no
1481          * matter what.
1482          */
1483         if ((patterns == NULL) || (num_patterns == 0))
1484                 return(DM_RET_DESCEND | DM_RET_COPY);
1485
1486         for (i = 0; i < num_patterns; i++) {
1487                 struct device_match_pattern *cur_pattern;
1488                 struct scsi_vpd_device_id *device_id_page;
1489
1490                 /*
1491                  * If the pattern in question isn't for a device node, we
1492                  * aren't interested.
1493                  */
1494                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1495                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1496                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1497                                 retval |= DM_RET_DESCEND;
1498                         continue;
1499                 }
1500
1501                 cur_pattern = &patterns[i].pattern.device_pattern;
1502
1503                 /* Error out if mutually exclusive options are specified. */
1504                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1505                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1506                         return(DM_RET_ERROR);
1507
1508                 /*
1509                  * If they want to match any device node, we give them any
1510                  * device node.
1511                  */
1512                 if (cur_pattern->flags == DEV_MATCH_ANY)
1513                         goto copy_dev_node;
1514
1515                 /*
1516                  * Not sure why someone would do this...
1517                  */
1518                 if (cur_pattern->flags == DEV_MATCH_NONE)
1519                         continue;
1520
1521                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1522                  && (cur_pattern->path_id != device->target->bus->path_id))
1523                         continue;
1524
1525                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1526                  && (cur_pattern->target_id != device->target->target_id))
1527                         continue;
1528
1529                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1530                  && (cur_pattern->target_lun != device->lun_id))
1531                         continue;
1532
1533                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1534                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1535                                     (caddr_t)&cur_pattern->data.inq_pat,
1536                                     1, sizeof(cur_pattern->data.inq_pat),
1537                                     scsi_static_inquiry_match) == NULL))
1538                         continue;
1539
1540                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1541                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1542                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1543                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1544                                       device->device_id_len
1545                                     - SVPD_DEVICE_ID_HDR_LEN,
1546                                       cur_pattern->data.devid_pat.id,
1547                                       cur_pattern->data.devid_pat.id_len) != 0))
1548                         continue;
1549
1550 copy_dev_node:
1551                 /*
1552                  * If we get to this point, the user definitely wants
1553                  * information on this device.  So tell the caller to copy
1554                  * the data out.
1555                  */
1556                 retval |= DM_RET_COPY;
1557
1558                 /*
1559                  * If the return action has been set to descend, then we
1560                  * know that we've already seen a peripheral matching
1561                  * expression, therefore we need to further descend the tree.
1562                  * This won't change by continuing around the loop, so we
1563                  * go ahead and return.  If we haven't seen a peripheral
1564                  * matching expression, we keep going around the loop until
1565                  * we exhaust the matching expressions.  We'll set the stop
1566                  * flag once we fall out of the loop.
1567                  */
1568                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1569                         return(retval);
1570         }
1571
1572         /*
1573          * If the return action hasn't been set to descend yet, that means
1574          * we haven't seen any peripheral matching patterns.  So tell the
1575          * caller to stop descending the tree -- the user doesn't want to
1576          * match against lower level tree elements.
1577          */
1578         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1579                 retval |= DM_RET_STOP;
1580
1581         return(retval);
1582 }
1583
1584 /*
1585  * Match a single peripheral against any number of match patterns.
1586  */
1587 static dev_match_ret
1588 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1589                struct cam_periph *periph)
1590 {
1591         dev_match_ret retval;
1592         u_int i;
1593
1594         /*
1595          * If we aren't given something to match against, that's an error.
1596          */
1597         if (periph == NULL)
1598                 return(DM_RET_ERROR);
1599
1600         /*
1601          * If there are no match entries, then this peripheral matches no
1602          * matter what.
1603          */
1604         if ((patterns == NULL) || (num_patterns == 0))
1605                 return(DM_RET_STOP | DM_RET_COPY);
1606
1607         /*
1608          * There aren't any nodes below a peripheral node, so there's no
1609          * reason to descend the tree any further.
1610          */
1611         retval = DM_RET_STOP;
1612
1613         for (i = 0; i < num_patterns; i++) {
1614                 struct periph_match_pattern *cur_pattern;
1615
1616                 /*
1617                  * If the pattern in question isn't for a peripheral, we
1618                  * aren't interested.
1619                  */
1620                 if (patterns[i].type != DEV_MATCH_PERIPH)
1621                         continue;
1622
1623                 cur_pattern = &patterns[i].pattern.periph_pattern;
1624
1625                 /*
1626                  * If they want to match on anything, then we will do so.
1627                  */
1628                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1629                         /* set the copy flag */
1630                         retval |= DM_RET_COPY;
1631
1632                         /*
1633                          * We've already set the return action to stop,
1634                          * since there are no nodes below peripherals in
1635                          * the tree.
1636                          */
1637                         return(retval);
1638                 }
1639
1640                 /*
1641                  * Not sure why someone would do this...
1642                  */
1643                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1644                         continue;
1645
1646                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1647                  && (cur_pattern->path_id != periph->path->bus->path_id))
1648                         continue;
1649
1650                 /*
1651                  * For the target and lun id's, we have to make sure the
1652                  * target and lun pointers aren't NULL.  The xpt peripheral
1653                  * has a wildcard target and device.
1654                  */
1655                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1656                  && ((periph->path->target == NULL)
1657                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1658                         continue;
1659
1660                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1661                  && ((periph->path->device == NULL)
1662                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1663                         continue;
1664
1665                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1666                  && (cur_pattern->unit_number != periph->unit_number))
1667                         continue;
1668
1669                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1670                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1671                              DEV_IDLEN) != 0))
1672                         continue;
1673
1674                 /*
1675                  * If we get to this point, the user definitely wants
1676                  * information on this peripheral.  So tell the caller to
1677                  * copy the data out.
1678                  */
1679                 retval |= DM_RET_COPY;
1680
1681                 /*
1682                  * The return action has already been set to stop, since
1683                  * peripherals don't have any nodes below them in the EDT.
1684                  */
1685                 return(retval);
1686         }
1687
1688         /*
1689          * If we get to this point, the peripheral that was passed in
1690          * doesn't match any of the patterns.
1691          */
1692         return(retval);
1693 }
1694
1695 static int
1696 xptedtbusfunc(struct cam_eb *bus, void *arg)
1697 {
1698         struct ccb_dev_match *cdm;
1699         struct cam_et *target;
1700         dev_match_ret retval;
1701
1702         cdm = (struct ccb_dev_match *)arg;
1703
1704         /*
1705          * If our position is for something deeper in the tree, that means
1706          * that we've already seen this node.  So, we keep going down.
1707          */
1708         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1709          && (cdm->pos.cookie.bus == bus)
1710          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1711          && (cdm->pos.cookie.target != NULL))
1712                 retval = DM_RET_DESCEND;
1713         else
1714                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1715
1716         /*
1717          * If we got an error, bail out of the search.
1718          */
1719         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1720                 cdm->status = CAM_DEV_MATCH_ERROR;
1721                 return(0);
1722         }
1723
1724         /*
1725          * If the copy flag is set, copy this bus out.
1726          */
1727         if (retval & DM_RET_COPY) {
1728                 int spaceleft, j;
1729
1730                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1731                         sizeof(struct dev_match_result));
1732
1733                 /*
1734                  * If we don't have enough space to put in another
1735                  * match result, save our position and tell the
1736                  * user there are more devices to check.
1737                  */
1738                 if (spaceleft < sizeof(struct dev_match_result)) {
1739                         bzero(&cdm->pos, sizeof(cdm->pos));
1740                         cdm->pos.position_type =
1741                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1742
1743                         cdm->pos.cookie.bus = bus;
1744                         cdm->pos.generations[CAM_BUS_GENERATION]=
1745                                 xsoftc.bus_generation;
1746                         cdm->status = CAM_DEV_MATCH_MORE;
1747                         return(0);
1748                 }
1749                 j = cdm->num_matches;
1750                 cdm->num_matches++;
1751                 cdm->matches[j].type = DEV_MATCH_BUS;
1752                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1753                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1754                 cdm->matches[j].result.bus_result.unit_number =
1755                         bus->sim->unit_number;
1756                 strlcpy(cdm->matches[j].result.bus_result.dev_name,
1757                         bus->sim->sim_name,
1758                         sizeof(cdm->matches[j].result.bus_result.dev_name));
1759         }
1760
1761         /*
1762          * If the user is only interested in buses, there's no
1763          * reason to descend to the next level in the tree.
1764          */
1765         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1766                 return(1);
1767
1768         /*
1769          * If there is a target generation recorded, check it to
1770          * make sure the target list hasn't changed.
1771          */
1772         mtx_lock(&bus->eb_mtx);
1773         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1774          && (cdm->pos.cookie.bus == bus)
1775          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1776          && (cdm->pos.cookie.target != NULL)) {
1777                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1778                     bus->generation)) {
1779                         mtx_unlock(&bus->eb_mtx);
1780                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1781                         return (0);
1782                 }
1783                 target = (struct cam_et *)cdm->pos.cookie.target;
1784                 target->refcount++;
1785         } else
1786                 target = NULL;
1787         mtx_unlock(&bus->eb_mtx);
1788
1789         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1790 }
1791
1792 static int
1793 xptedttargetfunc(struct cam_et *target, void *arg)
1794 {
1795         struct ccb_dev_match *cdm;
1796         struct cam_eb *bus;
1797         struct cam_ed *device;
1798
1799         cdm = (struct ccb_dev_match *)arg;
1800         bus = target->bus;
1801
1802         /*
1803          * If there is a device list generation recorded, check it to
1804          * make sure the device list hasn't changed.
1805          */
1806         mtx_lock(&bus->eb_mtx);
1807         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1808          && (cdm->pos.cookie.bus == bus)
1809          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1810          && (cdm->pos.cookie.target == target)
1811          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1812          && (cdm->pos.cookie.device != NULL)) {
1813                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1814                     target->generation) {
1815                         mtx_unlock(&bus->eb_mtx);
1816                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1817                         return(0);
1818                 }
1819                 device = (struct cam_ed *)cdm->pos.cookie.device;
1820                 device->refcount++;
1821         } else
1822                 device = NULL;
1823         mtx_unlock(&bus->eb_mtx);
1824
1825         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1826 }
1827
1828 static int
1829 xptedtdevicefunc(struct cam_ed *device, void *arg)
1830 {
1831         struct cam_eb *bus;
1832         struct cam_periph *periph;
1833         struct ccb_dev_match *cdm;
1834         dev_match_ret retval;
1835
1836         cdm = (struct ccb_dev_match *)arg;
1837         bus = device->target->bus;
1838
1839         /*
1840          * If our position is for something deeper in the tree, that means
1841          * that we've already seen this node.  So, we keep going down.
1842          */
1843         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1844          && (cdm->pos.cookie.device == device)
1845          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1846          && (cdm->pos.cookie.periph != NULL))
1847                 retval = DM_RET_DESCEND;
1848         else
1849                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1850                                         device);
1851
1852         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1853                 cdm->status = CAM_DEV_MATCH_ERROR;
1854                 return(0);
1855         }
1856
1857         /*
1858          * If the copy flag is set, copy this device out.
1859          */
1860         if (retval & DM_RET_COPY) {
1861                 int spaceleft, j;
1862
1863                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1864                         sizeof(struct dev_match_result));
1865
1866                 /*
1867                  * If we don't have enough space to put in another
1868                  * match result, save our position and tell the
1869                  * user there are more devices to check.
1870                  */
1871                 if (spaceleft < sizeof(struct dev_match_result)) {
1872                         bzero(&cdm->pos, sizeof(cdm->pos));
1873                         cdm->pos.position_type =
1874                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1875                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1876
1877                         cdm->pos.cookie.bus = device->target->bus;
1878                         cdm->pos.generations[CAM_BUS_GENERATION]=
1879                                 xsoftc.bus_generation;
1880                         cdm->pos.cookie.target = device->target;
1881                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1882                                 device->target->bus->generation;
1883                         cdm->pos.cookie.device = device;
1884                         cdm->pos.generations[CAM_DEV_GENERATION] =
1885                                 device->target->generation;
1886                         cdm->status = CAM_DEV_MATCH_MORE;
1887                         return(0);
1888                 }
1889                 j = cdm->num_matches;
1890                 cdm->num_matches++;
1891                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1892                 cdm->matches[j].result.device_result.path_id =
1893                         device->target->bus->path_id;
1894                 cdm->matches[j].result.device_result.target_id =
1895                         device->target->target_id;
1896                 cdm->matches[j].result.device_result.target_lun =
1897                         device->lun_id;
1898                 cdm->matches[j].result.device_result.protocol =
1899                         device->protocol;
1900                 bcopy(&device->inq_data,
1901                       &cdm->matches[j].result.device_result.inq_data,
1902                       sizeof(struct scsi_inquiry_data));
1903                 bcopy(&device->ident_data,
1904                       &cdm->matches[j].result.device_result.ident_data,
1905                       sizeof(struct ata_params));
1906
1907                 /* Let the user know whether this device is unconfigured */
1908                 if (device->flags & CAM_DEV_UNCONFIGURED)
1909                         cdm->matches[j].result.device_result.flags =
1910                                 DEV_RESULT_UNCONFIGURED;
1911                 else
1912                         cdm->matches[j].result.device_result.flags =
1913                                 DEV_RESULT_NOFLAG;
1914         }
1915
1916         /*
1917          * If the user isn't interested in peripherals, don't descend
1918          * the tree any further.
1919          */
1920         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1921                 return(1);
1922
1923         /*
1924          * If there is a peripheral list generation recorded, make sure
1925          * it hasn't changed.
1926          */
1927         xpt_lock_buses();
1928         mtx_lock(&bus->eb_mtx);
1929         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1930          && (cdm->pos.cookie.bus == bus)
1931          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1932          && (cdm->pos.cookie.target == device->target)
1933          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1934          && (cdm->pos.cookie.device == device)
1935          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1936          && (cdm->pos.cookie.periph != NULL)) {
1937                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1938                     device->generation) {
1939                         mtx_unlock(&bus->eb_mtx);
1940                         xpt_unlock_buses();
1941                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1942                         return(0);
1943                 }
1944                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1945                 periph->refcount++;
1946         } else
1947                 periph = NULL;
1948         mtx_unlock(&bus->eb_mtx);
1949         xpt_unlock_buses();
1950
1951         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1952 }
1953
1954 static int
1955 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1956 {
1957         struct ccb_dev_match *cdm;
1958         dev_match_ret retval;
1959
1960         cdm = (struct ccb_dev_match *)arg;
1961
1962         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1963
1964         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1965                 cdm->status = CAM_DEV_MATCH_ERROR;
1966                 return(0);
1967         }
1968
1969         /*
1970          * If the copy flag is set, copy this peripheral out.
1971          */
1972         if (retval & DM_RET_COPY) {
1973                 int spaceleft, j;
1974                 size_t l;
1975
1976                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1977                         sizeof(struct dev_match_result));
1978
1979                 /*
1980                  * If we don't have enough space to put in another
1981                  * match result, save our position and tell the
1982                  * user there are more devices to check.
1983                  */
1984                 if (spaceleft < sizeof(struct dev_match_result)) {
1985                         bzero(&cdm->pos, sizeof(cdm->pos));
1986                         cdm->pos.position_type =
1987                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1988                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1989                                 CAM_DEV_POS_PERIPH;
1990
1991                         cdm->pos.cookie.bus = periph->path->bus;
1992                         cdm->pos.generations[CAM_BUS_GENERATION]=
1993                                 xsoftc.bus_generation;
1994                         cdm->pos.cookie.target = periph->path->target;
1995                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1996                                 periph->path->bus->generation;
1997                         cdm->pos.cookie.device = periph->path->device;
1998                         cdm->pos.generations[CAM_DEV_GENERATION] =
1999                                 periph->path->target->generation;
2000                         cdm->pos.cookie.periph = periph;
2001                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2002                                 periph->path->device->generation;
2003                         cdm->status = CAM_DEV_MATCH_MORE;
2004                         return(0);
2005                 }
2006
2007                 j = cdm->num_matches;
2008                 cdm->num_matches++;
2009                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2010                 cdm->matches[j].result.periph_result.path_id =
2011                         periph->path->bus->path_id;
2012                 cdm->matches[j].result.periph_result.target_id =
2013                         periph->path->target->target_id;
2014                 cdm->matches[j].result.periph_result.target_lun =
2015                         periph->path->device->lun_id;
2016                 cdm->matches[j].result.periph_result.unit_number =
2017                         periph->unit_number;
2018                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2019                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2020                         periph->periph_name, l);
2021         }
2022
2023         return(1);
2024 }
2025
2026 static int
2027 xptedtmatch(struct ccb_dev_match *cdm)
2028 {
2029         struct cam_eb *bus;
2030         int ret;
2031
2032         cdm->num_matches = 0;
2033
2034         /*
2035          * Check the bus list generation.  If it has changed, the user
2036          * needs to reset everything and start over.
2037          */
2038         xpt_lock_buses();
2039         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2040          && (cdm->pos.cookie.bus != NULL)) {
2041                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
2042                     xsoftc.bus_generation) {
2043                         xpt_unlock_buses();
2044                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2045                         return(0);
2046                 }
2047                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
2048                 bus->refcount++;
2049         } else
2050                 bus = NULL;
2051         xpt_unlock_buses();
2052
2053         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
2054
2055         /*
2056          * If we get back 0, that means that we had to stop before fully
2057          * traversing the EDT.  It also means that one of the subroutines
2058          * has set the status field to the proper value.  If we get back 1,
2059          * we've fully traversed the EDT and copied out any matching entries.
2060          */
2061         if (ret == 1)
2062                 cdm->status = CAM_DEV_MATCH_LAST;
2063
2064         return(ret);
2065 }
2066
2067 static int
2068 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2069 {
2070         struct cam_periph *periph;
2071         struct ccb_dev_match *cdm;
2072
2073         cdm = (struct ccb_dev_match *)arg;
2074
2075         xpt_lock_buses();
2076         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2077          && (cdm->pos.cookie.pdrv == pdrv)
2078          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2079          && (cdm->pos.cookie.periph != NULL)) {
2080                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2081                     (*pdrv)->generation) {
2082                         xpt_unlock_buses();
2083                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2084                         return(0);
2085                 }
2086                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
2087                 periph->refcount++;
2088         } else
2089                 periph = NULL;
2090         xpt_unlock_buses();
2091
2092         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
2093 }
2094
2095 static int
2096 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2097 {
2098         struct ccb_dev_match *cdm;
2099         dev_match_ret retval;
2100
2101         cdm = (struct ccb_dev_match *)arg;
2102
2103         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2104
2105         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2106                 cdm->status = CAM_DEV_MATCH_ERROR;
2107                 return(0);
2108         }
2109
2110         /*
2111          * If the copy flag is set, copy this peripheral out.
2112          */
2113         if (retval & DM_RET_COPY) {
2114                 int spaceleft, j;
2115                 size_t l;
2116
2117                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2118                         sizeof(struct dev_match_result));
2119
2120                 /*
2121                  * If we don't have enough space to put in another
2122                  * match result, save our position and tell the
2123                  * user there are more devices to check.
2124                  */
2125                 if (spaceleft < sizeof(struct dev_match_result)) {
2126                         struct periph_driver **pdrv;
2127
2128                         pdrv = NULL;
2129                         bzero(&cdm->pos, sizeof(cdm->pos));
2130                         cdm->pos.position_type =
2131                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2132                                 CAM_DEV_POS_PERIPH;
2133
2134                         /*
2135                          * This may look a bit non-sensical, but it is
2136                          * actually quite logical.  There are very few
2137                          * peripheral drivers, and bloating every peripheral
2138                          * structure with a pointer back to its parent
2139                          * peripheral driver linker set entry would cost
2140                          * more in the long run than doing this quick lookup.
2141                          */
2142                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2143                                 if (strcmp((*pdrv)->driver_name,
2144                                     periph->periph_name) == 0)
2145                                         break;
2146                         }
2147
2148                         if (*pdrv == NULL) {
2149                                 cdm->status = CAM_DEV_MATCH_ERROR;
2150                                 return(0);
2151                         }
2152
2153                         cdm->pos.cookie.pdrv = pdrv;
2154                         /*
2155                          * The periph generation slot does double duty, as
2156                          * does the periph pointer slot.  They are used for
2157                          * both edt and pdrv lookups and positioning.
2158                          */
2159                         cdm->pos.cookie.periph = periph;
2160                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2161                                 (*pdrv)->generation;
2162                         cdm->status = CAM_DEV_MATCH_MORE;
2163                         return(0);
2164                 }
2165
2166                 j = cdm->num_matches;
2167                 cdm->num_matches++;
2168                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2169                 cdm->matches[j].result.periph_result.path_id =
2170                         periph->path->bus->path_id;
2171
2172                 /*
2173                  * The transport layer peripheral doesn't have a target or
2174                  * lun.
2175                  */
2176                 if (periph->path->target)
2177                         cdm->matches[j].result.periph_result.target_id =
2178                                 periph->path->target->target_id;
2179                 else
2180                         cdm->matches[j].result.periph_result.target_id =
2181                                 CAM_TARGET_WILDCARD;
2182
2183                 if (periph->path->device)
2184                         cdm->matches[j].result.periph_result.target_lun =
2185                                 periph->path->device->lun_id;
2186                 else
2187                         cdm->matches[j].result.periph_result.target_lun =
2188                                 CAM_LUN_WILDCARD;
2189
2190                 cdm->matches[j].result.periph_result.unit_number =
2191                         periph->unit_number;
2192                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2193                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2194                         periph->periph_name, l);
2195         }
2196
2197         return(1);
2198 }
2199
2200 static int
2201 xptperiphlistmatch(struct ccb_dev_match *cdm)
2202 {
2203         int ret;
2204
2205         cdm->num_matches = 0;
2206
2207         /*
2208          * At this point in the edt traversal function, we check the bus
2209          * list generation to make sure that no buses have been added or
2210          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2211          * For the peripheral driver list traversal function, however, we
2212          * don't have to worry about new peripheral driver types coming or
2213          * going; they're in a linker set, and therefore can't change
2214          * without a recompile.
2215          */
2216
2217         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2218          && (cdm->pos.cookie.pdrv != NULL))
2219                 ret = xptpdrvtraverse(
2220                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2221                                 xptplistpdrvfunc, cdm);
2222         else
2223                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2224
2225         /*
2226          * If we get back 0, that means that we had to stop before fully
2227          * traversing the peripheral driver tree.  It also means that one of
2228          * the subroutines has set the status field to the proper value.  If
2229          * we get back 1, we've fully traversed the EDT and copied out any
2230          * matching entries.
2231          */
2232         if (ret == 1)
2233                 cdm->status = CAM_DEV_MATCH_LAST;
2234
2235         return(ret);
2236 }
2237
2238 static int
2239 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2240 {
2241         struct cam_eb *bus, *next_bus;
2242         int retval;
2243
2244         retval = 1;
2245         if (start_bus)
2246                 bus = start_bus;
2247         else {
2248                 xpt_lock_buses();
2249                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2250                 if (bus == NULL) {
2251                         xpt_unlock_buses();
2252                         return (retval);
2253                 }
2254                 bus->refcount++;
2255                 xpt_unlock_buses();
2256         }
2257         for (; bus != NULL; bus = next_bus) {
2258                 retval = tr_func(bus, arg);
2259                 if (retval == 0) {
2260                         xpt_release_bus(bus);
2261                         break;
2262                 }
2263                 xpt_lock_buses();
2264                 next_bus = TAILQ_NEXT(bus, links);
2265                 if (next_bus)
2266                         next_bus->refcount++;
2267                 xpt_unlock_buses();
2268                 xpt_release_bus(bus);
2269         }
2270         return(retval);
2271 }
2272
2273 static int
2274 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2275                   xpt_targetfunc_t *tr_func, void *arg)
2276 {
2277         struct cam_et *target, *next_target;
2278         int retval;
2279
2280         retval = 1;
2281         if (start_target)
2282                 target = start_target;
2283         else {
2284                 mtx_lock(&bus->eb_mtx);
2285                 target = TAILQ_FIRST(&bus->et_entries);
2286                 if (target == NULL) {
2287                         mtx_unlock(&bus->eb_mtx);
2288                         return (retval);
2289                 }
2290                 target->refcount++;
2291                 mtx_unlock(&bus->eb_mtx);
2292         }
2293         for (; target != NULL; target = next_target) {
2294                 retval = tr_func(target, arg);
2295                 if (retval == 0) {
2296                         xpt_release_target(target);
2297                         break;
2298                 }
2299                 mtx_lock(&bus->eb_mtx);
2300                 next_target = TAILQ_NEXT(target, links);
2301                 if (next_target)
2302                         next_target->refcount++;
2303                 mtx_unlock(&bus->eb_mtx);
2304                 xpt_release_target(target);
2305         }
2306         return(retval);
2307 }
2308
2309 static int
2310 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2311                   xpt_devicefunc_t *tr_func, void *arg)
2312 {
2313         struct cam_eb *bus;
2314         struct cam_ed *device, *next_device;
2315         int retval;
2316
2317         retval = 1;
2318         bus = target->bus;
2319         if (start_device)
2320                 device = start_device;
2321         else {
2322                 mtx_lock(&bus->eb_mtx);
2323                 device = TAILQ_FIRST(&target->ed_entries);
2324                 if (device == NULL) {
2325                         mtx_unlock(&bus->eb_mtx);
2326                         return (retval);
2327                 }
2328                 device->refcount++;
2329                 mtx_unlock(&bus->eb_mtx);
2330         }
2331         for (; device != NULL; device = next_device) {
2332                 mtx_lock(&device->device_mtx);
2333                 retval = tr_func(device, arg);
2334                 mtx_unlock(&device->device_mtx);
2335                 if (retval == 0) {
2336                         xpt_release_device(device);
2337                         break;
2338                 }
2339                 mtx_lock(&bus->eb_mtx);
2340                 next_device = TAILQ_NEXT(device, links);
2341                 if (next_device)
2342                         next_device->refcount++;
2343                 mtx_unlock(&bus->eb_mtx);
2344                 xpt_release_device(device);
2345         }
2346         return(retval);
2347 }
2348
2349 static int
2350 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2351                   xpt_periphfunc_t *tr_func, void *arg)
2352 {
2353         struct cam_eb *bus;
2354         struct cam_periph *periph, *next_periph;
2355         int retval;
2356
2357         retval = 1;
2358
2359         bus = device->target->bus;
2360         if (start_periph)
2361                 periph = start_periph;
2362         else {
2363                 xpt_lock_buses();
2364                 mtx_lock(&bus->eb_mtx);
2365                 periph = SLIST_FIRST(&device->periphs);
2366                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2367                         periph = SLIST_NEXT(periph, periph_links);
2368                 if (periph == NULL) {
2369                         mtx_unlock(&bus->eb_mtx);
2370                         xpt_unlock_buses();
2371                         return (retval);
2372                 }
2373                 periph->refcount++;
2374                 mtx_unlock(&bus->eb_mtx);
2375                 xpt_unlock_buses();
2376         }
2377         for (; periph != NULL; periph = next_periph) {
2378                 retval = tr_func(periph, arg);
2379                 if (retval == 0) {
2380                         cam_periph_release_locked(periph);
2381                         break;
2382                 }
2383                 xpt_lock_buses();
2384                 mtx_lock(&bus->eb_mtx);
2385                 next_periph = SLIST_NEXT(periph, periph_links);
2386                 while (next_periph != NULL &&
2387                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2388                         next_periph = SLIST_NEXT(next_periph, periph_links);
2389                 if (next_periph)
2390                         next_periph->refcount++;
2391                 mtx_unlock(&bus->eb_mtx);
2392                 xpt_unlock_buses();
2393                 cam_periph_release_locked(periph);
2394         }
2395         return(retval);
2396 }
2397
2398 static int
2399 xptpdrvtraverse(struct periph_driver **start_pdrv,
2400                 xpt_pdrvfunc_t *tr_func, void *arg)
2401 {
2402         struct periph_driver **pdrv;
2403         int retval;
2404
2405         retval = 1;
2406
2407         /*
2408          * We don't traverse the peripheral driver list like we do the
2409          * other lists, because it is a linker set, and therefore cannot be
2410          * changed during runtime.  If the peripheral driver list is ever
2411          * re-done to be something other than a linker set (i.e. it can
2412          * change while the system is running), the list traversal should
2413          * be modified to work like the other traversal functions.
2414          */
2415         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2416              *pdrv != NULL; pdrv++) {
2417                 retval = tr_func(pdrv, arg);
2418
2419                 if (retval == 0)
2420                         return(retval);
2421         }
2422
2423         return(retval);
2424 }
2425
2426 static int
2427 xptpdperiphtraverse(struct periph_driver **pdrv,
2428                     struct cam_periph *start_periph,
2429                     xpt_periphfunc_t *tr_func, void *arg)
2430 {
2431         struct cam_periph *periph, *next_periph;
2432         int retval;
2433
2434         retval = 1;
2435
2436         if (start_periph)
2437                 periph = start_periph;
2438         else {
2439                 xpt_lock_buses();
2440                 periph = TAILQ_FIRST(&(*pdrv)->units);
2441                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2442                         periph = TAILQ_NEXT(periph, unit_links);
2443                 if (periph == NULL) {
2444                         xpt_unlock_buses();
2445                         return (retval);
2446                 }
2447                 periph->refcount++;
2448                 xpt_unlock_buses();
2449         }
2450         for (; periph != NULL; periph = next_periph) {
2451                 cam_periph_lock(periph);
2452                 retval = tr_func(periph, arg);
2453                 cam_periph_unlock(periph);
2454                 if (retval == 0) {
2455                         cam_periph_release(periph);
2456                         break;
2457                 }
2458                 xpt_lock_buses();
2459                 next_periph = TAILQ_NEXT(periph, unit_links);
2460                 while (next_periph != NULL &&
2461                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2462                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2463                 if (next_periph)
2464                         next_periph->refcount++;
2465                 xpt_unlock_buses();
2466                 cam_periph_release(periph);
2467         }
2468         return(retval);
2469 }
2470
2471 static int
2472 xptdefbusfunc(struct cam_eb *bus, void *arg)
2473 {
2474         struct xpt_traverse_config *tr_config;
2475
2476         tr_config = (struct xpt_traverse_config *)arg;
2477
2478         if (tr_config->depth == XPT_DEPTH_BUS) {
2479                 xpt_busfunc_t *tr_func;
2480
2481                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2482
2483                 return(tr_func(bus, tr_config->tr_arg));
2484         } else
2485                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2486 }
2487
2488 static int
2489 xptdeftargetfunc(struct cam_et *target, void *arg)
2490 {
2491         struct xpt_traverse_config *tr_config;
2492
2493         tr_config = (struct xpt_traverse_config *)arg;
2494
2495         if (tr_config->depth == XPT_DEPTH_TARGET) {
2496                 xpt_targetfunc_t *tr_func;
2497
2498                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2499
2500                 return(tr_func(target, tr_config->tr_arg));
2501         } else
2502                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2503 }
2504
2505 static int
2506 xptdefdevicefunc(struct cam_ed *device, void *arg)
2507 {
2508         struct xpt_traverse_config *tr_config;
2509
2510         tr_config = (struct xpt_traverse_config *)arg;
2511
2512         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2513                 xpt_devicefunc_t *tr_func;
2514
2515                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2516
2517                 return(tr_func(device, tr_config->tr_arg));
2518         } else
2519                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2520 }
2521
2522 static int
2523 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2524 {
2525         struct xpt_traverse_config *tr_config;
2526         xpt_periphfunc_t *tr_func;
2527
2528         tr_config = (struct xpt_traverse_config *)arg;
2529
2530         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2531
2532         /*
2533          * Unlike the other default functions, we don't check for depth
2534          * here.  The peripheral driver level is the last level in the EDT,
2535          * so if we're here, we should execute the function in question.
2536          */
2537         return(tr_func(periph, tr_config->tr_arg));
2538 }
2539
2540 /*
2541  * Execute the given function for every bus in the EDT.
2542  */
2543 static int
2544 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2545 {
2546         struct xpt_traverse_config tr_config;
2547
2548         tr_config.depth = XPT_DEPTH_BUS;
2549         tr_config.tr_func = tr_func;
2550         tr_config.tr_arg = arg;
2551
2552         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2553 }
2554
2555 /*
2556  * Execute the given function for every device in the EDT.
2557  */
2558 static int
2559 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2560 {
2561         struct xpt_traverse_config tr_config;
2562
2563         tr_config.depth = XPT_DEPTH_DEVICE;
2564         tr_config.tr_func = tr_func;
2565         tr_config.tr_arg = arg;
2566
2567         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2568 }
2569
2570 static int
2571 xptsetasyncfunc(struct cam_ed *device, void *arg)
2572 {
2573         struct cam_path path;
2574         struct ccb_getdev cgd;
2575         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2576
2577         /*
2578          * Don't report unconfigured devices (Wildcard devs,
2579          * devices only for target mode, device instances
2580          * that have been invalidated but are waiting for
2581          * their last reference count to be released).
2582          */
2583         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2584                 return (1);
2585
2586         xpt_compile_path(&path,
2587                          NULL,
2588                          device->target->bus->path_id,
2589                          device->target->target_id,
2590                          device->lun_id);
2591         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2592         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2593         xpt_action((union ccb *)&cgd);
2594         csa->callback(csa->callback_arg,
2595                             AC_FOUND_DEVICE,
2596                             &path, &cgd);
2597         xpt_release_path(&path);
2598
2599         return(1);
2600 }
2601
2602 static int
2603 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2604 {
2605         struct cam_path path;
2606         struct ccb_pathinq cpi;
2607         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2608
2609         xpt_compile_path(&path, /*periph*/NULL,
2610                          bus->path_id,
2611                          CAM_TARGET_WILDCARD,
2612                          CAM_LUN_WILDCARD);
2613         xpt_path_lock(&path);
2614         xpt_path_inq(&cpi, &path);
2615         csa->callback(csa->callback_arg,
2616                             AC_PATH_REGISTERED,
2617                             &path, &cpi);
2618         xpt_path_unlock(&path);
2619         xpt_release_path(&path);
2620
2621         return(1);
2622 }
2623
2624 void
2625 xpt_action(union ccb *start_ccb)
2626 {
2627
2628         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2629             ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2630                 xpt_action_name(start_ccb->ccb_h.func_code)));
2631
2632         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2633         (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb);
2634 }
2635
2636 void
2637 xpt_action_default(union ccb *start_ccb)
2638 {
2639         struct cam_path *path;
2640         struct cam_sim *sim;
2641         struct mtx *mtx;
2642
2643         path = start_ccb->ccb_h.path;
2644         CAM_DEBUG(path, CAM_DEBUG_TRACE,
2645             ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2646                 xpt_action_name(start_ccb->ccb_h.func_code)));
2647
2648         switch (start_ccb->ccb_h.func_code) {
2649         case XPT_SCSI_IO:
2650         {
2651                 struct cam_ed *device;
2652
2653                 /*
2654                  * For the sake of compatibility with SCSI-1
2655                  * devices that may not understand the identify
2656                  * message, we include lun information in the
2657                  * second byte of all commands.  SCSI-1 specifies
2658                  * that luns are a 3 bit value and reserves only 3
2659                  * bits for lun information in the CDB.  Later
2660                  * revisions of the SCSI spec allow for more than 8
2661                  * luns, but have deprecated lun information in the
2662                  * CDB.  So, if the lun won't fit, we must omit.
2663                  *
2664                  * Also be aware that during initial probing for devices,
2665                  * the inquiry information is unknown but initialized to 0.
2666                  * This means that this code will be exercised while probing
2667                  * devices with an ANSI revision greater than 2.
2668                  */
2669                 device = path->device;
2670                 if (device->protocol_version <= SCSI_REV_2
2671                  && start_ccb->ccb_h.target_lun < 8
2672                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2673
2674                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2675                             start_ccb->ccb_h.target_lun << 5;
2676                 }
2677                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2678         }
2679         /* FALLTHROUGH */
2680         case XPT_TARGET_IO:
2681         case XPT_CONT_TARGET_IO:
2682                 start_ccb->csio.sense_resid = 0;
2683                 start_ccb->csio.resid = 0;
2684                 /* FALLTHROUGH */
2685         case XPT_ATA_IO:
2686                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2687                         start_ccb->ataio.resid = 0;
2688                 /* FALLTHROUGH */
2689         case XPT_NVME_IO:
2690                 /* FALLTHROUGH */
2691         case XPT_NVME_ADMIN:
2692                 /* FALLTHROUGH */
2693         case XPT_MMC_IO:
2694                 /* XXX just like nmve_io? */
2695         case XPT_RESET_DEV:
2696         case XPT_ENG_EXEC:
2697         case XPT_SMP_IO:
2698         {
2699                 struct cam_devq *devq;
2700
2701                 devq = path->bus->sim->devq;
2702                 mtx_lock(&devq->send_mtx);
2703                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2704                 if (xpt_schedule_devq(devq, path->device) != 0)
2705                         xpt_run_devq(devq);
2706                 mtx_unlock(&devq->send_mtx);
2707                 break;
2708         }
2709         case XPT_CALC_GEOMETRY:
2710                 /* Filter out garbage */
2711                 if (start_ccb->ccg.block_size == 0
2712                  || start_ccb->ccg.volume_size == 0) {
2713                         start_ccb->ccg.cylinders = 0;
2714                         start_ccb->ccg.heads = 0;
2715                         start_ccb->ccg.secs_per_track = 0;
2716                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2717                         break;
2718                 }
2719                 goto call_sim;
2720         case XPT_ABORT:
2721         {
2722                 union ccb* abort_ccb;
2723
2724                 abort_ccb = start_ccb->cab.abort_ccb;
2725                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2726                         struct cam_ed *device;
2727                         struct cam_devq *devq;
2728
2729                         device = abort_ccb->ccb_h.path->device;
2730                         devq = device->sim->devq;
2731
2732                         mtx_lock(&devq->send_mtx);
2733                         if (abort_ccb->ccb_h.pinfo.index > 0) {
2734                                 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb);
2735                                 abort_ccb->ccb_h.status =
2736                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2737                                 xpt_freeze_devq_device(device, 1);
2738                                 mtx_unlock(&devq->send_mtx);
2739                                 xpt_done(abort_ccb);
2740                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2741                                 break;
2742                         }
2743                         mtx_unlock(&devq->send_mtx);
2744
2745                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2746                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2747                                 /*
2748                                  * We've caught this ccb en route to
2749                                  * the SIM.  Flag it for abort and the
2750                                  * SIM will do so just before starting
2751                                  * real work on the CCB.
2752                                  */
2753                                 abort_ccb->ccb_h.status =
2754                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2755                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2756                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2757                                 break;
2758                         }
2759                 }
2760                 if (XPT_FC_IS_QUEUED(abort_ccb)
2761                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2762                         /*
2763                          * It's already completed but waiting
2764                          * for our SWI to get to it.
2765                          */
2766                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2767                         break;
2768                 }
2769                 /*
2770                  * If we weren't able to take care of the abort request
2771                  * in the XPT, pass the request down to the SIM for processing.
2772                  */
2773         }
2774         /* FALLTHROUGH */
2775         case XPT_ACCEPT_TARGET_IO:
2776         case XPT_EN_LUN:
2777         case XPT_IMMED_NOTIFY:
2778         case XPT_NOTIFY_ACK:
2779         case XPT_RESET_BUS:
2780         case XPT_IMMEDIATE_NOTIFY:
2781         case XPT_NOTIFY_ACKNOWLEDGE:
2782         case XPT_GET_SIM_KNOB_OLD:
2783         case XPT_GET_SIM_KNOB:
2784         case XPT_SET_SIM_KNOB:
2785         case XPT_GET_TRAN_SETTINGS:
2786         case XPT_SET_TRAN_SETTINGS:
2787         case XPT_PATH_INQ:
2788 call_sim:
2789                 sim = path->bus->sim;
2790                 mtx = sim->mtx;
2791                 if (mtx && !mtx_owned(mtx))
2792                         mtx_lock(mtx);
2793                 else
2794                         mtx = NULL;
2795
2796                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2797                     ("Calling sim->sim_action(): func=%#x\n", start_ccb->ccb_h.func_code));
2798                 (*(sim->sim_action))(sim, start_ccb);
2799                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2800                     ("sim->sim_action returned: status=%#x\n", start_ccb->ccb_h.status));
2801                 if (mtx)
2802                         mtx_unlock(mtx);
2803                 break;
2804         case XPT_PATH_STATS:
2805                 start_ccb->cpis.last_reset = path->bus->last_reset;
2806                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2807                 break;
2808         case XPT_GDEV_TYPE:
2809         {
2810                 struct cam_ed *dev;
2811
2812                 dev = path->device;
2813                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2814                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2815                 } else {
2816                         struct ccb_getdev *cgd;
2817
2818                         cgd = &start_ccb->cgd;
2819                         cgd->protocol = dev->protocol;
2820                         cgd->inq_data = dev->inq_data;
2821                         cgd->ident_data = dev->ident_data;
2822                         cgd->inq_flags = dev->inq_flags;
2823                         cgd->ccb_h.status = CAM_REQ_CMP;
2824                         cgd->serial_num_len = dev->serial_num_len;
2825                         if ((dev->serial_num_len > 0)
2826                          && (dev->serial_num != NULL))
2827                                 bcopy(dev->serial_num, cgd->serial_num,
2828                                       dev->serial_num_len);
2829                 }
2830                 break;
2831         }
2832         case XPT_GDEV_STATS:
2833         {
2834                 struct ccb_getdevstats *cgds = &start_ccb->cgds;
2835                 struct cam_ed *dev = path->device;
2836                 struct cam_eb *bus = path->bus;
2837                 struct cam_et *tar = path->target;
2838                 struct cam_devq *devq = bus->sim->devq;
2839
2840                 mtx_lock(&devq->send_mtx);
2841                 cgds->dev_openings = dev->ccbq.dev_openings;
2842                 cgds->dev_active = dev->ccbq.dev_active;
2843                 cgds->allocated = dev->ccbq.allocated;
2844                 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2845                 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued;
2846                 cgds->last_reset = tar->last_reset;
2847                 cgds->maxtags = dev->maxtags;
2848                 cgds->mintags = dev->mintags;
2849                 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2850                         cgds->last_reset = bus->last_reset;
2851                 mtx_unlock(&devq->send_mtx);
2852                 cgds->ccb_h.status = CAM_REQ_CMP;
2853                 break;
2854         }
2855         case XPT_GDEVLIST:
2856         {
2857                 struct cam_periph       *nperiph;
2858                 struct periph_list      *periph_head;
2859                 struct ccb_getdevlist   *cgdl;
2860                 u_int                   i;
2861                 struct cam_ed           *device;
2862                 int                     found;
2863
2864
2865                 found = 0;
2866
2867                 /*
2868                  * Don't want anyone mucking with our data.
2869                  */
2870                 device = path->device;
2871                 periph_head = &device->periphs;
2872                 cgdl = &start_ccb->cgdl;
2873
2874                 /*
2875                  * Check and see if the list has changed since the user
2876                  * last requested a list member.  If so, tell them that the
2877                  * list has changed, and therefore they need to start over
2878                  * from the beginning.
2879                  */
2880                 if ((cgdl->index != 0) &&
2881                     (cgdl->generation != device->generation)) {
2882                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2883                         break;
2884                 }
2885
2886                 /*
2887                  * Traverse the list of peripherals and attempt to find
2888                  * the requested peripheral.
2889                  */
2890                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2891                      (nperiph != NULL) && (i <= cgdl->index);
2892                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2893                         if (i == cgdl->index) {
2894                                 strlcpy(cgdl->periph_name,
2895                                         nperiph->periph_name,
2896                                         sizeof(cgdl->periph_name));
2897                                 cgdl->unit_number = nperiph->unit_number;
2898                                 found = 1;
2899                         }
2900                 }
2901                 if (found == 0) {
2902                         cgdl->status = CAM_GDEVLIST_ERROR;
2903                         break;
2904                 }
2905
2906                 if (nperiph == NULL)
2907                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2908                 else
2909                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2910
2911                 cgdl->index++;
2912                 cgdl->generation = device->generation;
2913
2914                 cgdl->ccb_h.status = CAM_REQ_CMP;
2915                 break;
2916         }
2917         case XPT_DEV_MATCH:
2918         {
2919                 dev_pos_type position_type;
2920                 struct ccb_dev_match *cdm;
2921
2922                 cdm = &start_ccb->cdm;
2923
2924                 /*
2925                  * There are two ways of getting at information in the EDT.
2926                  * The first way is via the primary EDT tree.  It starts
2927                  * with a list of buses, then a list of targets on a bus,
2928                  * then devices/luns on a target, and then peripherals on a
2929                  * device/lun.  The "other" way is by the peripheral driver
2930                  * lists.  The peripheral driver lists are organized by
2931                  * peripheral driver.  (obviously)  So it makes sense to
2932                  * use the peripheral driver list if the user is looking
2933                  * for something like "da1", or all "da" devices.  If the
2934                  * user is looking for something on a particular bus/target
2935                  * or lun, it's generally better to go through the EDT tree.
2936                  */
2937
2938                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2939                         position_type = cdm->pos.position_type;
2940                 else {
2941                         u_int i;
2942
2943                         position_type = CAM_DEV_POS_NONE;
2944
2945                         for (i = 0; i < cdm->num_patterns; i++) {
2946                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2947                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2948                                         position_type = CAM_DEV_POS_EDT;
2949                                         break;
2950                                 }
2951                         }
2952
2953                         if (cdm->num_patterns == 0)
2954                                 position_type = CAM_DEV_POS_EDT;
2955                         else if (position_type == CAM_DEV_POS_NONE)
2956                                 position_type = CAM_DEV_POS_PDRV;
2957                 }
2958
2959                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2960                 case CAM_DEV_POS_EDT:
2961                         xptedtmatch(cdm);
2962                         break;
2963                 case CAM_DEV_POS_PDRV:
2964                         xptperiphlistmatch(cdm);
2965                         break;
2966                 default:
2967                         cdm->status = CAM_DEV_MATCH_ERROR;
2968                         break;
2969                 }
2970
2971                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2972                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2973                 else
2974                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2975
2976                 break;
2977         }
2978         case XPT_SASYNC_CB:
2979         {
2980                 struct ccb_setasync *csa;
2981                 struct async_node *cur_entry;
2982                 struct async_list *async_head;
2983                 u_int32_t added;
2984
2985                 csa = &start_ccb->csa;
2986                 added = csa->event_enable;
2987                 async_head = &path->device->asyncs;
2988
2989                 /*
2990                  * If there is already an entry for us, simply
2991                  * update it.
2992                  */
2993                 cur_entry = SLIST_FIRST(async_head);
2994                 while (cur_entry != NULL) {
2995                         if ((cur_entry->callback_arg == csa->callback_arg)
2996                          && (cur_entry->callback == csa->callback))
2997                                 break;
2998                         cur_entry = SLIST_NEXT(cur_entry, links);
2999                 }
3000
3001                 if (cur_entry != NULL) {
3002                         /*
3003                          * If the request has no flags set,
3004                          * remove the entry.
3005                          */
3006                         added &= ~cur_entry->event_enable;
3007                         if (csa->event_enable == 0) {
3008                                 SLIST_REMOVE(async_head, cur_entry,
3009                                              async_node, links);
3010                                 xpt_release_device(path->device);
3011                                 free(cur_entry, M_CAMXPT);
3012                         } else {
3013                                 cur_entry->event_enable = csa->event_enable;
3014                         }
3015                         csa->event_enable = added;
3016                 } else {
3017                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3018                                            M_NOWAIT);
3019                         if (cur_entry == NULL) {
3020                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3021                                 break;
3022                         }
3023                         cur_entry->event_enable = csa->event_enable;
3024                         cur_entry->event_lock = (path->bus->sim->mtx &&
3025                             mtx_owned(path->bus->sim->mtx)) ? 1 : 0;
3026                         cur_entry->callback_arg = csa->callback_arg;
3027                         cur_entry->callback = csa->callback;
3028                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3029                         xpt_acquire_device(path->device);
3030                 }
3031                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3032                 break;
3033         }
3034         case XPT_REL_SIMQ:
3035         {
3036                 struct ccb_relsim *crs;
3037                 struct cam_ed *dev;
3038
3039                 crs = &start_ccb->crs;
3040                 dev = path->device;
3041                 if (dev == NULL) {
3042
3043                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3044                         break;
3045                 }
3046
3047                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3048
3049                         /* Don't ever go below one opening */
3050                         if (crs->openings > 0) {
3051                                 xpt_dev_ccbq_resize(path, crs->openings);
3052                                 if (bootverbose) {
3053                                         xpt_print(path,
3054                                             "number of openings is now %d\n",
3055                                             crs->openings);
3056                                 }
3057                         }
3058                 }
3059
3060                 mtx_lock(&dev->sim->devq->send_mtx);
3061                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3062
3063                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3064
3065                                 /*
3066                                  * Just extend the old timeout and decrement
3067                                  * the freeze count so that a single timeout
3068                                  * is sufficient for releasing the queue.
3069                                  */
3070                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3071                                 callout_stop(&dev->callout);
3072                         } else {
3073
3074                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3075                         }
3076
3077                         callout_reset_sbt(&dev->callout,
3078                             SBT_1MS * crs->release_timeout, 0,
3079                             xpt_release_devq_timeout, dev, 0);
3080
3081                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3082
3083                 }
3084
3085                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3086
3087                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3088                                 /*
3089                                  * Decrement the freeze count so that a single
3090                                  * completion is still sufficient to unfreeze
3091                                  * the queue.
3092                                  */
3093                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3094                         } else {
3095
3096                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3097                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3098                         }
3099                 }
3100
3101                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3102
3103                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3104                          || (dev->ccbq.dev_active == 0)) {
3105
3106                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3107                         } else {
3108
3109                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3110                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3111                         }
3112                 }
3113                 mtx_unlock(&dev->sim->devq->send_mtx);
3114
3115                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3116                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3117                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3118                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3119                 break;
3120         }
3121         case XPT_DEBUG: {
3122                 struct cam_path *oldpath;
3123
3124                 /* Check that all request bits are supported. */
3125                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3126                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3127                         break;
3128                 }
3129
3130                 cam_dflags = CAM_DEBUG_NONE;
3131                 if (cam_dpath != NULL) {
3132                         oldpath = cam_dpath;
3133                         cam_dpath = NULL;
3134                         xpt_free_path(oldpath);
3135                 }
3136                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3137                         if (xpt_create_path(&cam_dpath, NULL,
3138                                             start_ccb->ccb_h.path_id,
3139                                             start_ccb->ccb_h.target_id,
3140                                             start_ccb->ccb_h.target_lun) !=
3141                                             CAM_REQ_CMP) {
3142                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3143                         } else {
3144                                 cam_dflags = start_ccb->cdbg.flags;
3145                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3146                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3147                                     cam_dflags);
3148                         }
3149                 } else
3150                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3151                 break;
3152         }
3153         case XPT_NOOP:
3154                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3155                         xpt_freeze_devq(path, 1);
3156                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3157                 break;
3158         case XPT_REPROBE_LUN:
3159                 xpt_async(AC_INQ_CHANGED, path, NULL);
3160                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3161                 xpt_done(start_ccb);
3162                 break;
3163         default:
3164         case XPT_SDEV_TYPE:
3165         case XPT_TERM_IO:
3166         case XPT_ENG_INQ:
3167                 /* XXX Implement */
3168                 xpt_print(start_ccb->ccb_h.path,
3169                     "%s: CCB type %#x %s not supported\n", __func__,
3170                     start_ccb->ccb_h.func_code,
3171                     xpt_action_name(start_ccb->ccb_h.func_code));
3172                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3173                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3174                         xpt_done(start_ccb);
3175                 }
3176                 break;
3177         }
3178         CAM_DEBUG(path, CAM_DEBUG_TRACE,
3179             ("xpt_action_default: func= %#x %s status %#x\n",
3180                 start_ccb->ccb_h.func_code,
3181                 xpt_action_name(start_ccb->ccb_h.func_code),
3182                 start_ccb->ccb_h.status));
3183 }
3184
3185 /*
3186  * Call the sim poll routine to allow the sim to complete
3187  * any inflight requests, then call camisr_runqueue to
3188  * complete any CCB that the polling completed.
3189  */
3190 void
3191 xpt_sim_poll(struct cam_sim *sim)
3192 {
3193         struct mtx *mtx;
3194
3195         mtx = sim->mtx;
3196         if (mtx)
3197                 mtx_lock(mtx);
3198         (*(sim->sim_poll))(sim);
3199         if (mtx)
3200                 mtx_unlock(mtx);
3201         camisr_runqueue();
3202 }
3203
3204 uint32_t
3205 xpt_poll_setup(union ccb *start_ccb)
3206 {
3207         u_int32_t timeout;
3208         struct    cam_sim *sim;
3209         struct    cam_devq *devq;
3210         struct    cam_ed *dev;
3211
3212         timeout = start_ccb->ccb_h.timeout * 10;
3213         sim = start_ccb->ccb_h.path->bus->sim;
3214         devq = sim->devq;
3215         dev = start_ccb->ccb_h.path->device;
3216
3217         /*
3218          * Steal an opening so that no other queued requests
3219          * can get it before us while we simulate interrupts.
3220          */
3221         mtx_lock(&devq->send_mtx);
3222         dev->ccbq.dev_openings--;
3223         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3224             (--timeout > 0)) {
3225                 mtx_unlock(&devq->send_mtx);
3226                 DELAY(100);
3227                 xpt_sim_poll(sim);
3228                 mtx_lock(&devq->send_mtx);
3229         }
3230         dev->ccbq.dev_openings++;
3231         mtx_unlock(&devq->send_mtx);
3232
3233         return (timeout);
3234 }
3235
3236 void
3237 xpt_pollwait(union ccb *start_ccb, uint32_t timeout)
3238 {
3239
3240         while (--timeout > 0) {
3241                 xpt_sim_poll(start_ccb->ccb_h.path->bus->sim);
3242                 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3243                     != CAM_REQ_INPROG)
3244                         break;
3245                 DELAY(100);
3246         }
3247
3248         if (timeout == 0) {
3249                 /*
3250                  * XXX Is it worth adding a sim_timeout entry
3251                  * point so we can attempt recovery?  If
3252                  * this is only used for dumps, I don't think
3253                  * it is.
3254                  */
3255                 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3256         }
3257 }
3258
3259 void
3260 xpt_polled_action(union ccb *start_ccb)
3261 {
3262         uint32_t        timeout;
3263         struct cam_ed   *dev;
3264
3265         timeout = start_ccb->ccb_h.timeout * 10;
3266         dev = start_ccb->ccb_h.path->device;
3267
3268         mtx_unlock(&dev->device_mtx);
3269
3270         timeout = xpt_poll_setup(start_ccb);
3271         if (timeout > 0) {
3272                 xpt_action(start_ccb);
3273                 xpt_pollwait(start_ccb, timeout);
3274         } else {
3275                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3276         }
3277
3278         mtx_lock(&dev->device_mtx);
3279 }
3280
3281 /*
3282  * Schedule a peripheral driver to receive a ccb when its
3283  * target device has space for more transactions.
3284  */
3285 void
3286 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3287 {
3288
3289         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3290         cam_periph_assert(periph, MA_OWNED);
3291         if (new_priority < periph->scheduled_priority) {
3292                 periph->scheduled_priority = new_priority;
3293                 xpt_run_allocq(periph, 0);
3294         }
3295 }
3296
3297
3298 /*
3299  * Schedule a device to run on a given queue.
3300  * If the device was inserted as a new entry on the queue,
3301  * return 1 meaning the device queue should be run. If we
3302  * were already queued, implying someone else has already
3303  * started the queue, return 0 so the caller doesn't attempt
3304  * to run the queue.
3305  */
3306 static int
3307 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3308                  u_int32_t new_priority)
3309 {
3310         int retval;
3311         u_int32_t old_priority;
3312
3313         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3314
3315
3316         old_priority = pinfo->priority;
3317
3318         /*
3319          * Are we already queued?
3320          */
3321         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3322                 /* Simply reorder based on new priority */
3323                 if (new_priority < old_priority) {
3324                         camq_change_priority(queue, pinfo->index,
3325                                              new_priority);
3326                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3327                                         ("changed priority to %d\n",
3328                                          new_priority));
3329                         retval = 1;
3330                 } else
3331                         retval = 0;
3332         } else {
3333                 /* New entry on the queue */
3334                 if (new_priority < old_priority)
3335                         pinfo->priority = new_priority;
3336
3337                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3338                                 ("Inserting onto queue\n"));
3339                 pinfo->generation = ++queue->generation;
3340                 camq_insert(queue, pinfo);
3341                 retval = 1;
3342         }
3343         return (retval);
3344 }
3345
3346 static void
3347 xpt_run_allocq_task(void *context, int pending)
3348 {
3349         struct cam_periph *periph = context;
3350
3351         cam_periph_lock(periph);
3352         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3353         xpt_run_allocq(periph, 1);
3354         cam_periph_unlock(periph);
3355         cam_periph_release(periph);
3356 }
3357
3358 static void
3359 xpt_run_allocq(struct cam_periph *periph, int sleep)
3360 {
3361         struct cam_ed   *device;
3362         union ccb       *ccb;
3363         uint32_t         prio;
3364
3365         cam_periph_assert(periph, MA_OWNED);
3366         if (periph->periph_allocating)
3367                 return;
3368         cam_periph_doacquire(periph);
3369         periph->periph_allocating = 1;
3370         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3371         device = periph->path->device;
3372         ccb = NULL;
3373 restart:
3374         while ((prio = min(periph->scheduled_priority,
3375             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3376             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3377              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3378
3379                 if (ccb == NULL &&
3380                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3381                         if (sleep) {
3382                                 ccb = xpt_get_ccb(periph);
3383                                 goto restart;
3384                         }
3385                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3386                                 break;
3387                         cam_periph_doacquire(periph);
3388                         periph->flags |= CAM_PERIPH_RUN_TASK;
3389                         taskqueue_enqueue(xsoftc.xpt_taskq,
3390                             &periph->periph_run_task);
3391                         break;
3392                 }
3393                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3394                 if (prio == periph->immediate_priority) {
3395                         periph->immediate_priority = CAM_PRIORITY_NONE;
3396                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3397                                         ("waking cam_periph_getccb()\n"));
3398                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3399                                           periph_links.sle);
3400                         wakeup(&periph->ccb_list);
3401                 } else {
3402                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3403                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3404                                         ("calling periph_start()\n"));
3405                         periph->periph_start(periph, ccb);
3406                 }
3407                 ccb = NULL;
3408         }
3409         if (ccb != NULL)
3410                 xpt_release_ccb(ccb);
3411         periph->periph_allocating = 0;
3412         cam_periph_release_locked(periph);
3413 }
3414
3415 static void
3416 xpt_run_devq(struct cam_devq *devq)
3417 {
3418         struct mtx *mtx;
3419
3420         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3421
3422         devq->send_queue.qfrozen_cnt++;
3423         while ((devq->send_queue.entries > 0)
3424             && (devq->send_openings > 0)
3425             && (devq->send_queue.qfrozen_cnt <= 1)) {
3426                 struct  cam_ed *device;
3427                 union ccb *work_ccb;
3428                 struct  cam_sim *sim;
3429                 struct xpt_proto *proto;
3430
3431                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3432                                                            CAMQ_HEAD);
3433                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3434                                 ("running device %p\n", device));
3435
3436                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3437                 if (work_ccb == NULL) {
3438                         printf("device on run queue with no ccbs???\n");
3439                         continue;
3440                 }
3441
3442                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3443
3444                         mtx_lock(&xsoftc.xpt_highpower_lock);
3445                         if (xsoftc.num_highpower <= 0) {
3446                                 /*
3447                                  * We got a high power command, but we
3448                                  * don't have any available slots.  Freeze
3449                                  * the device queue until we have a slot
3450                                  * available.
3451                                  */
3452                                 xpt_freeze_devq_device(device, 1);
3453                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3454                                                    highpowerq_entry);
3455
3456                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3457                                 continue;
3458                         } else {
3459                                 /*
3460                                  * Consume a high power slot while
3461                                  * this ccb runs.
3462                                  */
3463                                 xsoftc.num_highpower--;
3464                         }
3465                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3466                 }
3467                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3468                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3469                 devq->send_openings--;
3470                 devq->send_active++;
3471                 xpt_schedule_devq(devq, device);
3472                 mtx_unlock(&devq->send_mtx);
3473
3474                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3475                         /*
3476                          * The client wants to freeze the queue
3477                          * after this CCB is sent.
3478                          */
3479                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3480                 }
3481
3482                 /* In Target mode, the peripheral driver knows best... */
3483                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3484                         if ((device->inq_flags & SID_CmdQue) != 0
3485                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3486                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3487                         else
3488                                 /*
3489                                  * Clear this in case of a retried CCB that
3490                                  * failed due to a rejected tag.
3491                                  */
3492                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3493                 }
3494
3495                 KASSERT(device == work_ccb->ccb_h.path->device,
3496                     ("device (%p) / path->device (%p) mismatch",
3497                         device, work_ccb->ccb_h.path->device));
3498                 proto = xpt_proto_find(device->protocol);
3499                 if (proto && proto->ops->debug_out)
3500                         proto->ops->debug_out(work_ccb);
3501
3502                 /*
3503                  * Device queues can be shared among multiple SIM instances
3504                  * that reside on different buses.  Use the SIM from the
3505                  * queued device, rather than the one from the calling bus.
3506                  */
3507                 sim = device->sim;
3508                 mtx = sim->mtx;
3509                 if (mtx && !mtx_owned(mtx))
3510                         mtx_lock(mtx);
3511                 else
3512                         mtx = NULL;
3513                 work_ccb->ccb_h.qos.periph_data = cam_iosched_now();
3514                 (*(sim->sim_action))(sim, work_ccb);
3515                 if (mtx)
3516                         mtx_unlock(mtx);
3517                 mtx_lock(&devq->send_mtx);
3518         }
3519         devq->send_queue.qfrozen_cnt--;
3520 }
3521
3522 /*
3523  * This function merges stuff from the slave ccb into the master ccb, while
3524  * keeping important fields in the master ccb constant.
3525  */
3526 void
3527 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3528 {
3529
3530         /*
3531          * Pull fields that are valid for peripheral drivers to set
3532          * into the master CCB along with the CCB "payload".
3533          */
3534         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3535         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3536         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3537         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3538         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3539               sizeof(union ccb) - sizeof(struct ccb_hdr));
3540 }
3541
3542 void
3543 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3544                     u_int32_t priority, u_int32_t flags)
3545 {
3546
3547         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3548         ccb_h->pinfo.priority = priority;
3549         ccb_h->path = path;
3550         ccb_h->path_id = path->bus->path_id;
3551         if (path->target)
3552                 ccb_h->target_id = path->target->target_id;
3553         else
3554                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3555         if (path->device) {
3556                 ccb_h->target_lun = path->device->lun_id;
3557                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3558         } else {
3559                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3560         }
3561         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3562         ccb_h->flags = flags;
3563         ccb_h->xflags = 0;
3564 }
3565
3566 void
3567 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3568 {
3569         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3570 }
3571
3572 /* Path manipulation functions */
3573 cam_status
3574 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3575                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3576 {
3577         struct     cam_path *path;
3578         cam_status status;
3579
3580         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3581
3582         if (path == NULL) {
3583                 status = CAM_RESRC_UNAVAIL;
3584                 return(status);
3585         }
3586         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3587         if (status != CAM_REQ_CMP) {
3588                 free(path, M_CAMPATH);
3589                 path = NULL;
3590         }
3591         *new_path_ptr = path;
3592         return (status);
3593 }
3594
3595 cam_status
3596 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3597                          struct cam_periph *periph, path_id_t path_id,
3598                          target_id_t target_id, lun_id_t lun_id)
3599 {
3600
3601         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3602             lun_id));
3603 }
3604
3605 cam_status
3606 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3607                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3608 {
3609         struct       cam_eb *bus;
3610         struct       cam_et *target;
3611         struct       cam_ed *device;
3612         cam_status   status;
3613
3614         status = CAM_REQ_CMP;   /* Completed without error */
3615         target = NULL;          /* Wildcarded */
3616         device = NULL;          /* Wildcarded */
3617
3618         /*
3619          * We will potentially modify the EDT, so block interrupts
3620          * that may attempt to create cam paths.
3621          */
3622         bus = xpt_find_bus(path_id);
3623         if (bus == NULL) {
3624                 status = CAM_PATH_INVALID;
3625         } else {
3626                 xpt_lock_buses();
3627                 mtx_lock(&bus->eb_mtx);
3628                 target = xpt_find_target(bus, target_id);
3629                 if (target == NULL) {
3630                         /* Create one */
3631                         struct cam_et *new_target;
3632
3633                         new_target = xpt_alloc_target(bus, target_id);
3634                         if (new_target == NULL) {
3635                                 status = CAM_RESRC_UNAVAIL;
3636                         } else {
3637                                 target = new_target;
3638                         }
3639                 }
3640                 xpt_unlock_buses();
3641                 if (target != NULL) {
3642                         device = xpt_find_device(target, lun_id);
3643                         if (device == NULL) {
3644                                 /* Create one */
3645                                 struct cam_ed *new_device;
3646
3647                                 new_device =
3648                                     (*(bus->xport->ops->alloc_device))(bus,
3649                                                                        target,
3650                                                                        lun_id);
3651                                 if (new_device == NULL) {
3652                                         status = CAM_RESRC_UNAVAIL;
3653                                 } else {
3654                                         device = new_device;
3655                                 }
3656                         }
3657                 }
3658                 mtx_unlock(&bus->eb_mtx);
3659         }
3660
3661         /*
3662          * Only touch the user's data if we are successful.
3663          */
3664         if (status == CAM_REQ_CMP) {
3665                 new_path->periph = perph;
3666                 new_path->bus = bus;
3667                 new_path->target = target;
3668                 new_path->device = device;
3669                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3670         } else {
3671                 if (device != NULL)
3672                         xpt_release_device(device);
3673                 if (target != NULL)
3674                         xpt_release_target(target);
3675                 if (bus != NULL)
3676                         xpt_release_bus(bus);
3677         }
3678         return (status);
3679 }
3680
3681 cam_status
3682 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3683 {
3684         struct     cam_path *new_path;
3685
3686         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3687         if (new_path == NULL)
3688                 return(CAM_RESRC_UNAVAIL);
3689         xpt_copy_path(new_path, path);
3690         *new_path_ptr = new_path;
3691         return (CAM_REQ_CMP);
3692 }
3693
3694 void
3695 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3696 {
3697
3698         *new_path = *path;
3699         if (path->bus != NULL)
3700                 xpt_acquire_bus(path->bus);
3701         if (path->target != NULL)
3702                 xpt_acquire_target(path->target);
3703         if (path->device != NULL)
3704                 xpt_acquire_device(path->device);
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_done(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 /*
4625  * XXX Appears to be unused.
4626  */
4627 static void
4628 xpt_release_simq_timeout(void *arg)
4629 {
4630         struct cam_sim *sim;
4631
4632         sim = (struct cam_sim *)arg;
4633         xpt_release_simq(sim, /* run_queue */ TRUE);
4634 }
4635
4636 void
4637 xpt_done(union ccb *done_ccb)
4638 {
4639         struct cam_doneq *queue;
4640         int     run, hash;
4641
4642 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4643         if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4644             done_ccb->csio.bio != NULL)
4645                 biotrack(done_ccb->csio.bio, __func__);
4646 #endif
4647
4648         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4649             ("xpt_done: func= %#x %s status %#x\n",
4650                 done_ccb->ccb_h.func_code,
4651                 xpt_action_name(done_ccb->ccb_h.func_code),
4652                 done_ccb->ccb_h.status));
4653         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4654                 return;
4655
4656         /* Store the time the ccb was in the sim */
4657         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4658         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4659             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4660         queue = &cam_doneqs[hash];
4661         mtx_lock(&queue->cam_doneq_mtx);
4662         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4663         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4664         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4665         mtx_unlock(&queue->cam_doneq_mtx);
4666         if (run)
4667                 wakeup(&queue->cam_doneq);
4668 }
4669
4670 void
4671 xpt_done_direct(union ccb *done_ccb)
4672 {
4673
4674         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4675             ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4676         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4677                 return;
4678
4679         /* Store the time the ccb was in the sim */
4680         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4681         xpt_done_process(&done_ccb->ccb_h);
4682 }
4683
4684 union ccb *
4685 xpt_alloc_ccb()
4686 {
4687         union ccb *new_ccb;
4688
4689         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4690         return (new_ccb);
4691 }
4692
4693 union ccb *
4694 xpt_alloc_ccb_nowait()
4695 {
4696         union ccb *new_ccb;
4697
4698         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4699         return (new_ccb);
4700 }
4701
4702 void
4703 xpt_free_ccb(union ccb *free_ccb)
4704 {
4705         free(free_ccb, M_CAMCCB);
4706 }
4707
4708
4709
4710 /* Private XPT functions */
4711
4712 /*
4713  * Get a CAM control block for the caller. Charge the structure to the device
4714  * referenced by the path.  If we don't have sufficient resources to allocate
4715  * more ccbs, we return NULL.
4716  */
4717 static union ccb *
4718 xpt_get_ccb_nowait(struct cam_periph *periph)
4719 {
4720         union ccb *new_ccb;
4721
4722         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4723         if (new_ccb == NULL)
4724                 return (NULL);
4725         periph->periph_allocated++;
4726         cam_ccbq_take_opening(&periph->path->device->ccbq);
4727         return (new_ccb);
4728 }
4729
4730 static union ccb *
4731 xpt_get_ccb(struct cam_periph *periph)
4732 {
4733         union ccb *new_ccb;
4734
4735         cam_periph_unlock(periph);
4736         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4737         cam_periph_lock(periph);
4738         periph->periph_allocated++;
4739         cam_ccbq_take_opening(&periph->path->device->ccbq);
4740         return (new_ccb);
4741 }
4742
4743 union ccb *
4744 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4745 {
4746         struct ccb_hdr *ccb_h;
4747
4748         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4749         cam_periph_assert(periph, MA_OWNED);
4750         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4751             ccb_h->pinfo.priority != priority) {
4752                 if (priority < periph->immediate_priority) {
4753                         periph->immediate_priority = priority;
4754                         xpt_run_allocq(periph, 0);
4755                 } else
4756                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4757                             "cgticb", 0);
4758         }
4759         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4760         return ((union ccb *)ccb_h);
4761 }
4762
4763 static void
4764 xpt_acquire_bus(struct cam_eb *bus)
4765 {
4766
4767         xpt_lock_buses();
4768         bus->refcount++;
4769         xpt_unlock_buses();
4770 }
4771
4772 static void
4773 xpt_release_bus(struct cam_eb *bus)
4774 {
4775
4776         xpt_lock_buses();
4777         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4778         if (--bus->refcount > 0) {
4779                 xpt_unlock_buses();
4780                 return;
4781         }
4782         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4783         xsoftc.bus_generation++;
4784         xpt_unlock_buses();
4785         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4786             ("destroying bus, but target list is not empty"));
4787         cam_sim_release(bus->sim);
4788         mtx_destroy(&bus->eb_mtx);
4789         free(bus, M_CAMXPT);
4790 }
4791
4792 static struct cam_et *
4793 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4794 {
4795         struct cam_et *cur_target, *target;
4796
4797         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4798         mtx_assert(&bus->eb_mtx, MA_OWNED);
4799         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4800                                          M_NOWAIT|M_ZERO);
4801         if (target == NULL)
4802                 return (NULL);
4803
4804         TAILQ_INIT(&target->ed_entries);
4805         target->bus = bus;
4806         target->target_id = target_id;
4807         target->refcount = 1;
4808         target->generation = 0;
4809         target->luns = NULL;
4810         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4811         timevalclear(&target->last_reset);
4812         /*
4813          * Hold a reference to our parent bus so it
4814          * will not go away before we do.
4815          */
4816         bus->refcount++;
4817
4818         /* Insertion sort into our bus's target list */
4819         cur_target = TAILQ_FIRST(&bus->et_entries);
4820         while (cur_target != NULL && cur_target->target_id < target_id)
4821                 cur_target = TAILQ_NEXT(cur_target, links);
4822         if (cur_target != NULL) {
4823                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4824         } else {
4825                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4826         }
4827         bus->generation++;
4828         return (target);
4829 }
4830
4831 static void
4832 xpt_acquire_target(struct cam_et *target)
4833 {
4834         struct cam_eb *bus = target->bus;
4835
4836         mtx_lock(&bus->eb_mtx);
4837         target->refcount++;
4838         mtx_unlock(&bus->eb_mtx);
4839 }
4840
4841 static void
4842 xpt_release_target(struct cam_et *target)
4843 {
4844         struct cam_eb *bus = target->bus;
4845
4846         mtx_lock(&bus->eb_mtx);
4847         if (--target->refcount > 0) {
4848                 mtx_unlock(&bus->eb_mtx);
4849                 return;
4850         }
4851         TAILQ_REMOVE(&bus->et_entries, target, links);
4852         bus->generation++;
4853         mtx_unlock(&bus->eb_mtx);
4854         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4855             ("destroying target, but device list is not empty"));
4856         xpt_release_bus(bus);
4857         mtx_destroy(&target->luns_mtx);
4858         if (target->luns)
4859                 free(target->luns, M_CAMXPT);
4860         free(target, M_CAMXPT);
4861 }
4862
4863 static struct cam_ed *
4864 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4865                          lun_id_t lun_id)
4866 {
4867         struct cam_ed *device;
4868
4869         device = xpt_alloc_device(bus, target, lun_id);
4870         if (device == NULL)
4871                 return (NULL);
4872
4873         device->mintags = 1;
4874         device->maxtags = 1;
4875         return (device);
4876 }
4877
4878 static void
4879 xpt_destroy_device(void *context, int pending)
4880 {
4881         struct cam_ed   *device = context;
4882
4883         mtx_lock(&device->device_mtx);
4884         mtx_destroy(&device->device_mtx);
4885         free(device, M_CAMDEV);
4886 }
4887
4888 struct cam_ed *
4889 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4890 {
4891         struct cam_ed   *cur_device, *device;
4892         struct cam_devq *devq;
4893         cam_status status;
4894
4895         mtx_assert(&bus->eb_mtx, MA_OWNED);
4896         /* Make space for us in the device queue on our bus */
4897         devq = bus->sim->devq;
4898         mtx_lock(&devq->send_mtx);
4899         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4900         mtx_unlock(&devq->send_mtx);
4901         if (status != CAM_REQ_CMP)
4902                 return (NULL);
4903
4904         device = (struct cam_ed *)malloc(sizeof(*device),
4905                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4906         if (device == NULL)
4907                 return (NULL);
4908
4909         cam_init_pinfo(&device->devq_entry);
4910         device->target = target;
4911         device->lun_id = lun_id;
4912         device->sim = bus->sim;
4913         if (cam_ccbq_init(&device->ccbq,
4914                           bus->sim->max_dev_openings) != 0) {
4915                 free(device, M_CAMDEV);
4916                 return (NULL);
4917         }
4918         SLIST_INIT(&device->asyncs);
4919         SLIST_INIT(&device->periphs);
4920         device->generation = 0;
4921         device->flags = CAM_DEV_UNCONFIGURED;
4922         device->tag_delay_count = 0;
4923         device->tag_saved_openings = 0;
4924         device->refcount = 1;
4925         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4926         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4927         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4928         /*
4929          * Hold a reference to our parent bus so it
4930          * will not go away before we do.
4931          */
4932         target->refcount++;
4933
4934         cur_device = TAILQ_FIRST(&target->ed_entries);
4935         while (cur_device != NULL && cur_device->lun_id < lun_id)
4936                 cur_device = TAILQ_NEXT(cur_device, links);
4937         if (cur_device != NULL)
4938                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4939         else
4940                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4941         target->generation++;
4942         return (device);
4943 }
4944
4945 void
4946 xpt_acquire_device(struct cam_ed *device)
4947 {
4948         struct cam_eb *bus = device->target->bus;
4949
4950         mtx_lock(&bus->eb_mtx);
4951         device->refcount++;
4952         mtx_unlock(&bus->eb_mtx);
4953 }
4954
4955 void
4956 xpt_release_device(struct cam_ed *device)
4957 {
4958         struct cam_eb *bus = device->target->bus;
4959         struct cam_devq *devq;
4960
4961         mtx_lock(&bus->eb_mtx);
4962         if (--device->refcount > 0) {
4963                 mtx_unlock(&bus->eb_mtx);
4964                 return;
4965         }
4966
4967         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4968         device->target->generation++;
4969         mtx_unlock(&bus->eb_mtx);
4970
4971         /* Release our slot in the devq */
4972         devq = bus->sim->devq;
4973         mtx_lock(&devq->send_mtx);
4974         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4975         mtx_unlock(&devq->send_mtx);
4976
4977         KASSERT(SLIST_EMPTY(&device->periphs),
4978             ("destroying device, but periphs list is not empty"));
4979         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4980             ("destroying device while still queued for ccbs"));
4981
4982         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4983                 callout_stop(&device->callout);
4984
4985         xpt_release_target(device->target);
4986
4987         cam_ccbq_fini(&device->ccbq);
4988         /*
4989          * Free allocated memory.  free(9) does nothing if the
4990          * supplied pointer is NULL, so it is safe to call without
4991          * checking.
4992          */
4993         free(device->supported_vpds, M_CAMXPT);
4994         free(device->device_id, M_CAMXPT);
4995         free(device->ext_inq, M_CAMXPT);
4996         free(device->physpath, M_CAMXPT);
4997         free(device->rcap_buf, M_CAMXPT);
4998         free(device->serial_num, M_CAMXPT);
4999         free(device->nvme_data, M_CAMXPT);
5000         free(device->nvme_cdata, M_CAMXPT);
5001         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
5002 }
5003
5004 u_int32_t
5005 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
5006 {
5007         int     result;
5008         struct  cam_ed *dev;
5009
5010         dev = path->device;
5011         mtx_lock(&dev->sim->devq->send_mtx);
5012         result = cam_ccbq_resize(&dev->ccbq, newopenings);
5013         mtx_unlock(&dev->sim->devq->send_mtx);
5014         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5015          || (dev->inq_flags & SID_CmdQue) != 0)
5016                 dev->tag_saved_openings = newopenings;
5017         return (result);
5018 }
5019
5020 static struct cam_eb *
5021 xpt_find_bus(path_id_t path_id)
5022 {
5023         struct cam_eb *bus;
5024
5025         xpt_lock_buses();
5026         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
5027              bus != NULL;
5028              bus = TAILQ_NEXT(bus, links)) {
5029                 if (bus->path_id == path_id) {
5030                         bus->refcount++;
5031                         break;
5032                 }
5033         }
5034         xpt_unlock_buses();
5035         return (bus);
5036 }
5037
5038 static struct cam_et *
5039 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5040 {
5041         struct cam_et *target;
5042
5043         mtx_assert(&bus->eb_mtx, MA_OWNED);
5044         for (target = TAILQ_FIRST(&bus->et_entries);
5045              target != NULL;
5046              target = TAILQ_NEXT(target, links)) {
5047                 if (target->target_id == target_id) {
5048                         target->refcount++;
5049                         break;
5050                 }
5051         }
5052         return (target);
5053 }
5054
5055 static struct cam_ed *
5056 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5057 {
5058         struct cam_ed *device;
5059
5060         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
5061         for (device = TAILQ_FIRST(&target->ed_entries);
5062              device != NULL;
5063              device = TAILQ_NEXT(device, links)) {
5064                 if (device->lun_id == lun_id) {
5065                         device->refcount++;
5066                         break;
5067                 }
5068         }
5069         return (device);
5070 }
5071
5072 void
5073 xpt_start_tags(struct cam_path *path)
5074 {
5075         struct ccb_relsim crs;
5076         struct cam_ed *device;
5077         struct cam_sim *sim;
5078         int    newopenings;
5079
5080         device = path->device;
5081         sim = path->bus->sim;
5082         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5083         xpt_freeze_devq(path, /*count*/1);
5084         device->inq_flags |= SID_CmdQue;
5085         if (device->tag_saved_openings != 0)
5086                 newopenings = device->tag_saved_openings;
5087         else
5088                 newopenings = min(device->maxtags,
5089                                   sim->max_tagged_dev_openings);
5090         xpt_dev_ccbq_resize(path, newopenings);
5091         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5092         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5093         crs.ccb_h.func_code = XPT_REL_SIMQ;
5094         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5095         crs.openings
5096             = crs.release_timeout
5097             = crs.qfrozen_cnt
5098             = 0;
5099         xpt_action((union ccb *)&crs);
5100 }
5101
5102 void
5103 xpt_stop_tags(struct cam_path *path)
5104 {
5105         struct ccb_relsim crs;
5106         struct cam_ed *device;
5107         struct cam_sim *sim;
5108
5109         device = path->device;
5110         sim = path->bus->sim;
5111         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5112         device->tag_delay_count = 0;
5113         xpt_freeze_devq(path, /*count*/1);
5114         device->inq_flags &= ~SID_CmdQue;
5115         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
5116         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5117         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5118         crs.ccb_h.func_code = XPT_REL_SIMQ;
5119         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5120         crs.openings
5121             = crs.release_timeout
5122             = crs.qfrozen_cnt
5123             = 0;
5124         xpt_action((union ccb *)&crs);
5125 }
5126
5127 /*
5128  * Assume all possible buses are detected by this time, so allow boot
5129  * as soon as they all are scanned.
5130  */
5131 static void
5132 xpt_boot_delay(void *arg)
5133 {
5134
5135         xpt_release_boot();
5136 }
5137
5138 /*
5139  * Now that all config hooks have completed, start boot_delay timer,
5140  * waiting for possibly still undetected buses (USB) to appear.
5141  */
5142 static void
5143 xpt_ch_done(void *arg)
5144 {
5145
5146         callout_init(&xsoftc.boot_callout, 1);
5147         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5148             xpt_boot_delay, NULL, 0);
5149 }
5150 SYSINIT(xpt_hw_delay, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_ANY, xpt_ch_done, NULL);
5151
5152 /*
5153  * Now that interrupts are enabled, go find our devices
5154  */
5155 static void
5156 xpt_config(void *arg)
5157 {
5158         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
5159                 printf("xpt_config: failed to create taskqueue thread.\n");
5160
5161         /* Setup debugging path */
5162         if (cam_dflags != CAM_DEBUG_NONE) {
5163                 if (xpt_create_path(&cam_dpath, NULL,
5164                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
5165                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
5166                         printf("xpt_config: xpt_create_path() failed for debug"
5167                                " target %d:%d:%d, debugging disabled\n",
5168                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
5169                         cam_dflags = CAM_DEBUG_NONE;
5170                 }
5171         } else
5172                 cam_dpath = NULL;
5173
5174         periphdriver_init(1);
5175         xpt_hold_boot();
5176
5177         /* Fire up rescan thread. */
5178         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5179             "cam", "scanner")) {
5180                 printf("xpt_config: failed to create rescan thread.\n");
5181         }
5182 }
5183
5184 void
5185 xpt_hold_boot_locked(void)
5186 {
5187
5188         if (xsoftc.buses_to_config++ == 0)
5189                 root_mount_hold_token("CAM", &xsoftc.xpt_rootmount);
5190 }
5191
5192 void
5193 xpt_hold_boot(void)
5194 {
5195
5196         xpt_lock_buses();
5197         xpt_hold_boot_locked();
5198         xpt_unlock_buses();
5199 }
5200
5201 void
5202 xpt_release_boot(void)
5203 {
5204
5205         xpt_lock_buses();
5206         if (--xsoftc.buses_to_config == 0) {
5207                 if (xsoftc.buses_config_done == 0) {
5208                         xsoftc.buses_config_done = 1;
5209                         xsoftc.buses_to_config++;
5210                         TASK_INIT(&xsoftc.boot_task, 0, xpt_finishconfig_task,
5211                             NULL);
5212                         taskqueue_enqueue(taskqueue_thread, &xsoftc.boot_task);
5213                 } else
5214                         root_mount_rel(&xsoftc.xpt_rootmount);
5215         }
5216         xpt_unlock_buses();
5217 }
5218
5219 /*
5220  * If the given device only has one peripheral attached to it, and if that
5221  * peripheral is the passthrough driver, announce it.  This insures that the
5222  * user sees some sort of announcement for every peripheral in their system.
5223  */
5224 static int
5225 xptpassannouncefunc(struct cam_ed *device, void *arg)
5226 {
5227         struct cam_periph *periph;
5228         int i;
5229
5230         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5231              periph = SLIST_NEXT(periph, periph_links), i++);
5232
5233         periph = SLIST_FIRST(&device->periphs);
5234         if ((i == 1)
5235          && (strncmp(periph->periph_name, "pass", 4) == 0))
5236                 xpt_announce_periph(periph, NULL);
5237
5238         return(1);
5239 }
5240
5241 static void
5242 xpt_finishconfig_task(void *context, int pending)
5243 {
5244
5245         periphdriver_init(2);
5246         /*
5247          * Check for devices with no "standard" peripheral driver
5248          * attached.  For any devices like that, announce the
5249          * passthrough driver so the user will see something.
5250          */
5251         if (!bootverbose)
5252                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5253
5254         xpt_release_boot();
5255 }
5256
5257 cam_status
5258 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5259                    struct cam_path *path)
5260 {
5261         struct ccb_setasync csa;
5262         cam_status status;
5263         int xptpath = 0;
5264
5265         if (path == NULL) {
5266                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5267                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5268                 if (status != CAM_REQ_CMP)
5269                         return (status);
5270                 xpt_path_lock(path);
5271                 xptpath = 1;
5272         }
5273
5274         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5275         csa.ccb_h.func_code = XPT_SASYNC_CB;
5276         csa.event_enable = event;
5277         csa.callback = cbfunc;
5278         csa.callback_arg = cbarg;
5279         xpt_action((union ccb *)&csa);
5280         status = csa.ccb_h.status;
5281
5282         CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5283             ("xpt_register_async: func %p\n", cbfunc));
5284
5285         if (xptpath) {
5286                 xpt_path_unlock(path);
5287                 xpt_free_path(path);
5288         }
5289
5290         if ((status == CAM_REQ_CMP) &&
5291             (csa.event_enable & AC_FOUND_DEVICE)) {
5292                 /*
5293                  * Get this peripheral up to date with all
5294                  * the currently existing devices.
5295                  */
5296                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5297         }
5298         if ((status == CAM_REQ_CMP) &&
5299             (csa.event_enable & AC_PATH_REGISTERED)) {
5300                 /*
5301                  * Get this peripheral up to date with all
5302                  * the currently existing buses.
5303                  */
5304                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5305         }
5306
5307         return (status);
5308 }
5309
5310 static void
5311 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5312 {
5313         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5314
5315         switch (work_ccb->ccb_h.func_code) {
5316         /* Common cases first */
5317         case XPT_PATH_INQ:              /* Path routing inquiry */
5318         {
5319                 struct ccb_pathinq *cpi;
5320
5321                 cpi = &work_ccb->cpi;
5322                 cpi->version_num = 1; /* XXX??? */
5323                 cpi->hba_inquiry = 0;
5324                 cpi->target_sprt = 0;
5325                 cpi->hba_misc = 0;
5326                 cpi->hba_eng_cnt = 0;
5327                 cpi->max_target = 0;
5328                 cpi->max_lun = 0;
5329                 cpi->initiator_id = 0;
5330                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5331                 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5332                 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5333                 cpi->unit_number = sim->unit_number;
5334                 cpi->bus_id = sim->bus_id;
5335                 cpi->base_transfer_speed = 0;
5336                 cpi->protocol = PROTO_UNSPECIFIED;
5337                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5338                 cpi->transport = XPORT_UNSPECIFIED;
5339                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5340                 cpi->ccb_h.status = CAM_REQ_CMP;
5341                 xpt_done(work_ccb);
5342                 break;
5343         }
5344         default:
5345                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5346                 xpt_done(work_ccb);
5347                 break;
5348         }
5349 }
5350
5351 /*
5352  * The xpt as a "controller" has no interrupt sources, so polling
5353  * is a no-op.
5354  */
5355 static void
5356 xptpoll(struct cam_sim *sim)
5357 {
5358 }
5359
5360 void
5361 xpt_lock_buses(void)
5362 {
5363         mtx_lock(&xsoftc.xpt_topo_lock);
5364 }
5365
5366 void
5367 xpt_unlock_buses(void)
5368 {
5369         mtx_unlock(&xsoftc.xpt_topo_lock);
5370 }
5371
5372 struct mtx *
5373 xpt_path_mtx(struct cam_path *path)
5374 {
5375
5376         return (&path->device->device_mtx);
5377 }
5378
5379 static void
5380 xpt_done_process(struct ccb_hdr *ccb_h)
5381 {
5382         struct cam_sim *sim = NULL;
5383         struct cam_devq *devq = NULL;
5384         struct mtx *mtx = NULL;
5385
5386 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5387         struct ccb_scsiio *csio;
5388
5389         if (ccb_h->func_code == XPT_SCSI_IO) {
5390                 csio = &((union ccb *)ccb_h)->csio;
5391                 if (csio->bio != NULL)
5392                         biotrack(csio->bio, __func__);
5393         }
5394 #endif
5395
5396         if (ccb_h->flags & CAM_HIGH_POWER) {
5397                 struct highpowerlist    *hphead;
5398                 struct cam_ed           *device;
5399
5400                 mtx_lock(&xsoftc.xpt_highpower_lock);
5401                 hphead = &xsoftc.highpowerq;
5402
5403                 device = STAILQ_FIRST(hphead);
5404
5405                 /*
5406                  * Increment the count since this command is done.
5407                  */
5408                 xsoftc.num_highpower++;
5409
5410                 /*
5411                  * Any high powered commands queued up?
5412                  */
5413                 if (device != NULL) {
5414
5415                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5416                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5417
5418                         mtx_lock(&device->sim->devq->send_mtx);
5419                         xpt_release_devq_device(device,
5420                                          /*count*/1, /*runqueue*/TRUE);
5421                         mtx_unlock(&device->sim->devq->send_mtx);
5422                 } else
5423                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5424         }
5425
5426         /*
5427          * Insulate against a race where the periph is destroyed but CCBs are
5428          * still not all processed. This shouldn't happen, but allows us better
5429          * bug diagnostic when it does.
5430          */
5431         if (ccb_h->path->bus)
5432                 sim = ccb_h->path->bus->sim;
5433
5434         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5435                 KASSERT(sim, ("sim missing for CAM_RELEASE_SIMQ request"));
5436                 xpt_release_simq(sim, /*run_queue*/FALSE);
5437                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5438         }
5439
5440         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5441          && (ccb_h->status & CAM_DEV_QFRZN)) {
5442                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5443                 ccb_h->status &= ~CAM_DEV_QFRZN;
5444         }
5445
5446         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5447                 struct cam_ed *dev = ccb_h->path->device;
5448
5449                 if (sim)
5450                         devq = sim->devq;
5451                 KASSERT(devq, ("Periph disappeared with request pending."));
5452
5453                 mtx_lock(&devq->send_mtx);
5454                 devq->send_active--;
5455                 devq->send_openings++;
5456                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5457
5458                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5459                   && (dev->ccbq.dev_active == 0))) {
5460                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5461                         xpt_release_devq_device(dev, /*count*/1,
5462                                          /*run_queue*/FALSE);
5463                 }
5464
5465                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5466                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5467                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5468                         xpt_release_devq_device(dev, /*count*/1,
5469                                          /*run_queue*/FALSE);
5470                 }
5471
5472                 if (!device_is_queued(dev))
5473                         (void)xpt_schedule_devq(devq, dev);
5474                 xpt_run_devq(devq);
5475                 mtx_unlock(&devq->send_mtx);
5476
5477                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5478                         mtx = xpt_path_mtx(ccb_h->path);
5479                         mtx_lock(mtx);
5480
5481                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5482                          && (--dev->tag_delay_count == 0))
5483                                 xpt_start_tags(ccb_h->path);
5484                 }
5485         }
5486
5487         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5488                 if (mtx == NULL) {
5489                         mtx = xpt_path_mtx(ccb_h->path);
5490                         mtx_lock(mtx);
5491                 }
5492         } else {
5493                 if (mtx != NULL) {
5494                         mtx_unlock(mtx);
5495                         mtx = NULL;
5496                 }
5497         }
5498
5499         /* Call the peripheral driver's callback */
5500         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5501         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5502         if (mtx != NULL)
5503                 mtx_unlock(mtx);
5504 }
5505
5506 void
5507 xpt_done_td(void *arg)
5508 {
5509         struct cam_doneq *queue = arg;
5510         struct ccb_hdr *ccb_h;
5511         STAILQ_HEAD(, ccb_hdr)  doneq;
5512
5513         STAILQ_INIT(&doneq);
5514         mtx_lock(&queue->cam_doneq_mtx);
5515         while (1) {
5516                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5517                         queue->cam_doneq_sleep = 1;
5518                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5519                             PRIBIO, "-", 0);
5520                         queue->cam_doneq_sleep = 0;
5521                 }
5522                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5523                 mtx_unlock(&queue->cam_doneq_mtx);
5524
5525                 THREAD_NO_SLEEPING();
5526                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5527                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5528                         xpt_done_process(ccb_h);
5529                 }
5530                 THREAD_SLEEPING_OK();
5531
5532                 mtx_lock(&queue->cam_doneq_mtx);
5533         }
5534 }
5535
5536 static void
5537 camisr_runqueue(void)
5538 {
5539         struct  ccb_hdr *ccb_h;
5540         struct cam_doneq *queue;
5541         int i;
5542
5543         /* Process global queues. */
5544         for (i = 0; i < cam_num_doneqs; i++) {
5545                 queue = &cam_doneqs[i];
5546                 mtx_lock(&queue->cam_doneq_mtx);
5547                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5548                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5549                         mtx_unlock(&queue->cam_doneq_mtx);
5550                         xpt_done_process(ccb_h);
5551                         mtx_lock(&queue->cam_doneq_mtx);
5552                 }
5553                 mtx_unlock(&queue->cam_doneq_mtx);
5554         }
5555 }
5556
5557 struct kv
5558 {
5559         uint32_t v;
5560         const char *name;
5561 };
5562
5563 static struct kv map[] = {
5564         { XPT_NOOP, "XPT_NOOP" },
5565         { XPT_SCSI_IO, "XPT_SCSI_IO" },
5566         { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5567         { XPT_GDEVLIST, "XPT_GDEVLIST" },
5568         { XPT_PATH_INQ, "XPT_PATH_INQ" },
5569         { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5570         { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5571         { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5572         { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5573         { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5574         { XPT_DEBUG, "XPT_DEBUG" },
5575         { XPT_PATH_STATS, "XPT_PATH_STATS" },
5576         { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5577         { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5578         { XPT_ASYNC, "XPT_ASYNC" },
5579         { XPT_ABORT, "XPT_ABORT" },
5580         { XPT_RESET_BUS, "XPT_RESET_BUS" },
5581         { XPT_RESET_DEV, "XPT_RESET_DEV" },
5582         { XPT_TERM_IO, "XPT_TERM_IO" },
5583         { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5584         { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5585         { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5586         { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5587         { XPT_ATA_IO, "XPT_ATA_IO" },
5588         { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5589         { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5590         { XPT_NVME_IO, "XPT_NVME_IO" },
5591         { XPT_MMC_IO, "XPT_MMC_IO" },
5592         { XPT_SMP_IO, "XPT_SMP_IO" },
5593         { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5594         { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" },
5595         { XPT_ENG_INQ, "XPT_ENG_INQ" },
5596         { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5597         { XPT_EN_LUN, "XPT_EN_LUN" },
5598         { XPT_TARGET_IO, "XPT_TARGET_IO" },
5599         { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5600         { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5601         { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5602         { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5603         { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5604         { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5605         { 0, 0 }
5606 };
5607
5608 const char *
5609 xpt_action_name(uint32_t action)
5610 {
5611         static char buffer[32]; /* Only for unknown messages -- racy */
5612         struct kv *walker = map;
5613
5614         while (walker->name != NULL) {
5615                 if (walker->v == action)
5616                         return (walker->name);
5617                 walker++;
5618         }
5619
5620         snprintf(buffer, sizeof(buffer), "%#x", action);
5621         return (buffer);
5622 }