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 /* Object for defering XPT actions to a taskqueue */
 103 struct xpt_task {
 104         struct task     task;
 105         void            *data1;
 106         uintptr_t       data2;
 107 };
 108
 109 struct xpt_softc {
 110         uint32_t                xpt_generation;
 111
 112         /* number of high powered commands that can go through right now */
 113         struct mtx              xpt_highpower_lock;
 114         STAILQ_HEAD(highpowerlist, cam_ed)      highpowerq;
 115         int                     num_highpower;
 116
 117         /* queue for handling async rescan requests. */
 118         TAILQ_HEAD(, ccb_hdr) ccb_scanq;
 119         int buses_to_config;
 120         int buses_config_done;
 121         int announce_nosbuf;
 122
 123         /*
 124          * Registered buses
 125          *
 126          * N.B., "busses" is an archaic spelling of "buses".  In new code
 127          * "buses" is preferred.
 128          */
 129         TAILQ_HEAD(,cam_eb)     xpt_busses;
 130         u_int                   bus_generation;
 131
 132         struct intr_config_hook *xpt_config_hook;
 133
 134         int                     boot_delay;
 135         struct callout          boot_callout;
 136
 137         struct mtx              xpt_topo_lock;
 138         struct mtx              xpt_lock;
 139         struct taskqueue        *xpt_taskq;
 140 };
 141
 142 typedef enum {
 143         DM_RET_COPY             = 0x01,
 144         DM_RET_FLAG_MASK        = 0x0f,
 145         DM_RET_NONE             = 0x00,
 146         DM_RET_STOP             = 0x10,
 147         DM_RET_DESCEND          = 0x20,
 148         DM_RET_ERROR            = 0x30,
 149         DM_RET_ACTION_MASK      = 0xf0
 150 } dev_match_ret;
 151
 152 typedef enum {
 153         XPT_DEPTH_BUS,
 154         XPT_DEPTH_TARGET,
 155         XPT_DEPTH_DEVICE,
 156         XPT_DEPTH_PERIPH
 157 } xpt_traverse_depth;
 158
 159 struct xpt_traverse_config {
 160         xpt_traverse_depth      depth;
 161         void                    *tr_func;
 162         void                    *tr_arg;
 163 };
 164
 165 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 166 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 167 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 168 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 169 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 170
 171 /* Transport layer configuration information */
 172 static struct xpt_softc xsoftc;
 173
 174 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
 175
 176 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
 177            &xsoftc.boot_delay, 0, "Bus registration wait time");
 178 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
 179             &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
 180 SYSCTL_INT(_kern_cam, OID_AUTO, announce_nosbuf, CTLFLAG_RWTUN,
 181             &xsoftc.announce_nosbuf, 0, "Don't use sbuf for announcements");
 182
 183 struct cam_doneq {
 184         struct mtx_padalign     cam_doneq_mtx;
 185         STAILQ_HEAD(, ccb_hdr)  cam_doneq;
 186         int                     cam_doneq_sleep;
 187 };
 188
 189 static struct cam_doneq cam_doneqs[MAXCPU];
 190 static int cam_num_doneqs;
 191 static struct proc *cam_proc;
 192
 193 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
 194            &cam_num_doneqs, 0, "Number of completion queues/threads");
 195
 196 struct cam_periph *xpt_periph;
 197
 198 static periph_init_t xpt_periph_init;
 199
 200 static struct periph_driver xpt_driver =
 201 {
 202         xpt_periph_init, "xpt",
 203         TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
 204         CAM_PERIPH_DRV_EARLY
 205 };
 206
 207 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 208
 209 static d_open_t xptopen;
 210 static d_close_t xptclose;
 211 static d_ioctl_t xptioctl;
 212 static d_ioctl_t xptdoioctl;
 213
 214 static struct cdevsw xpt_cdevsw = {
 215         .d_version =    D_VERSION,
 216         .d_flags =      0,
 217         .d_open =       xptopen,
 218         .d_close =      xptclose,
 219         .d_ioctl =      xptioctl,
 220         .d_name =       "xpt",
 221 };
 222
 223 /* Storage for debugging datastructures */
 224 struct cam_path *cam_dpath;
 225 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
 226 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN,
 227         &cam_dflags, 0, "Enabled debug flags");
 228 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
 229 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN,
 230         &cam_debug_delay, 0, "Delay in us after each debug message");
 231
 232 /* Our boot-time initialization hook */
 233 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 234
 235 static moduledata_t cam_moduledata = {
 236         "cam",
 237         cam_module_event_handler,
 238         NULL
 239 };
 240
 241 static int      xpt_init(void *);
 242
 243 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 244 MODULE_VERSION(cam, 1);
 245
 246
 247 static void             xpt_async_bcast(struct async_list *async_head,
 248                                         u_int32_t async_code,
 249                                         struct cam_path *path,
 250                                         void *async_arg);
 251 static path_id_t xptnextfreepathid(void);
 252 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 253 static union ccb *xpt_get_ccb(struct cam_periph *periph);
 254 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
 255 static void      xpt_run_allocq(struct cam_periph *periph, int sleep);
 256 static void      xpt_run_allocq_task(void *context, int pending);
 257 static void      xpt_run_devq(struct cam_devq *devq);
 258 static timeout_t xpt_release_devq_timeout;
 259 static void      xpt_release_simq_timeout(void *arg) __unused;
 260 static void      xpt_acquire_bus(struct cam_eb *bus);
 261 static void      xpt_release_bus(struct cam_eb *bus);
 262 static uint32_t  xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
 263 static int       xpt_release_devq_device(struct cam_ed *dev, u_int count,
 264                     int run_queue);
 265 static struct cam_et*
 266                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 267 static void      xpt_acquire_target(struct cam_et *target);
 268 static void      xpt_release_target(struct cam_et *target);
 269 static struct cam_eb*
 270                  xpt_find_bus(path_id_t path_id);
 271 static struct cam_et*
 272                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 273 static struct cam_ed*
 274                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 275 static void      xpt_config(void *arg);
 276 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 277                                  u_int32_t new_priority);
 278 static xpt_devicefunc_t xptpassannouncefunc;
 279 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 280 static void      xptpoll(struct cam_sim *sim);
 281 static void      camisr_runqueue(void);
 282 static void      xpt_done_process(struct ccb_hdr *ccb_h);
 283 static void      xpt_done_td(void *);
 284 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 285                                     u_int num_patterns, struct cam_eb *bus);
 286 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 287                                        u_int num_patterns,
 288                                        struct cam_ed *device);
 289 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 290                                        u_int num_patterns,
 291                                        struct cam_periph *periph);
 292 static xpt_busfunc_t    xptedtbusfunc;
 293 static xpt_targetfunc_t xptedttargetfunc;
 294 static xpt_devicefunc_t xptedtdevicefunc;
 295 static xpt_periphfunc_t xptedtperiphfunc;
 296 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 297 static xpt_periphfunc_t xptplistperiphfunc;
 298 static int              xptedtmatch(struct ccb_dev_match *cdm);
 299 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 300 static int              xptbustraverse(struct cam_eb *start_bus,
 301                                        xpt_busfunc_t *tr_func, void *arg);
 302 static int              xpttargettraverse(struct cam_eb *bus,
 303                                           struct cam_et *start_target,
 304                                           xpt_targetfunc_t *tr_func, void *arg);
 305 static int              xptdevicetraverse(struct cam_et *target,
 306                                           struct cam_ed *start_device,
 307                                           xpt_devicefunc_t *tr_func, void *arg);
 308 static int              xptperiphtraverse(struct cam_ed *device,
 309                                           struct cam_periph *start_periph,
 310                                           xpt_periphfunc_t *tr_func, void *arg);
 311 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 312                                         xpt_pdrvfunc_t *tr_func, void *arg);
 313 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 314                                             struct cam_periph *start_periph,
 315                                             xpt_periphfunc_t *tr_func,
 316                                             void *arg);
 317 static xpt_busfunc_t    xptdefbusfunc;
 318 static xpt_targetfunc_t xptdeftargetfunc;
 319 static xpt_devicefunc_t xptdefdevicefunc;
 320 static xpt_periphfunc_t xptdefperiphfunc;
 321 static void             xpt_finishconfig_task(void *context, int pending);
 322 static void             xpt_dev_async_default(u_int32_t async_code,
 323                                               struct cam_eb *bus,
 324                                               struct cam_et *target,
 325                                               struct cam_ed *device,
 326                                               void *async_arg);
 327 static struct cam_ed *  xpt_alloc_device_default(struct cam_eb *bus,
 328                                                  struct cam_et *target,
 329                                                  lun_id_t lun_id);
 330 static xpt_devicefunc_t xptsetasyncfunc;
 331 static xpt_busfunc_t    xptsetasyncbusfunc;
 332 static cam_status       xptregister(struct cam_periph *periph,
 333                                     void *arg);
 334 static __inline int device_is_queued(struct cam_ed *device);
 335
 336 static __inline int
 337 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 338 {
 339         int     retval;
 340
 341         mtx_assert(&devq->send_mtx, MA_OWNED);
 342         if ((dev->ccbq.queue.entries > 0) &&
 343             (dev->ccbq.dev_openings > 0) &&
 344             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 345                 /*
 346                  * The priority of a device waiting for controller
 347                  * resources is that of the highest priority CCB
 348                  * enqueued.
 349                  */
 350                 retval =
 351                     xpt_schedule_dev(&devq->send_queue,
 352                                      &dev->devq_entry,
 353                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 354         } else {
 355                 retval = 0;
 356         }
 357         return (retval);
 358 }
 359
 360 static __inline int
 361 device_is_queued(struct cam_ed *device)
 362 {
 363         return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
 364 }
 365
 366 static void
 367 xpt_periph_init()
 368 {
 369         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 370 }
 371
 372 static int
 373 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 374 {
 375
 376         /*
 377          * Only allow read-write access.
 378          */
 379         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 380                 return(EPERM);
 381
 382         /*
 383          * We don't allow nonblocking access.
 384          */
 385         if ((flags & O_NONBLOCK) != 0) {
 386                 printf("%s: can't do nonblocking access\n", devtoname(dev));
 387                 return(ENODEV);
 388         }
 389
 390         return(0);
 391 }
 392
 393 static int
 394 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 395 {
 396
 397         return(0);
 398 }
 399
 400 /*
 401  * Don't automatically grab the xpt softc lock here even though this is going
 402  * through the xpt device.  The xpt device is really just a back door for
 403  * accessing other devices and SIMs, so the right thing to do is to grab
 404  * the appropriate SIM lock once the bus/SIM is located.
 405  */
 406 static int
 407 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 408 {
 409         int error;
 410
 411         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 412                 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
 413         }
 414         return (error);
 415 }
 416
 417 static int
 418 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 419 {
 420         int error;
 421
 422         error = 0;
 423
 424         switch(cmd) {
 425         /*
 426          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 427          * to accept CCB types that don't quite make sense to send through a
 428          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 429          * in the CAM spec.
 430          */
 431         case CAMIOCOMMAND: {
 432                 union ccb *ccb;
 433                 union ccb *inccb;
 434                 struct cam_eb *bus;
 435
 436                 inccb = (union ccb *)addr;
 437 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 438                 if (inccb->ccb_h.func_code == XPT_SCSI_IO)
 439                         inccb->csio.bio = NULL;
 440 #endif
 441
 442                 if (inccb->ccb_h.flags & CAM_UNLOCKED)
 443                         return (EINVAL);
 444
 445                 bus = xpt_find_bus(inccb->ccb_h.path_id);
 446                 if (bus == NULL)
 447                         return (EINVAL);
 448
 449                 switch (inccb->ccb_h.func_code) {
 450                 case XPT_SCAN_BUS:
 451                 case XPT_RESET_BUS:
 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                 case XPT_SCAN_TGT:
 459                         if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
 460                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 461                                 xpt_release_bus(bus);
 462                                 return (EINVAL);
 463                         }
 464                         break;
 465                 default:
 466                         break;
 467                 }
 468
 469                 switch(inccb->ccb_h.func_code) {
 470                 case XPT_SCAN_BUS:
 471                 case XPT_RESET_BUS:
 472                 case XPT_PATH_INQ:
 473                 case XPT_ENG_INQ:
 474                 case XPT_SCAN_LUN:
 475                 case XPT_SCAN_TGT:
 476
 477                         ccb = xpt_alloc_ccb();
 478
 479                         /*
 480                          * Create a path using the bus, target, and lun the
 481                          * user passed in.
 482                          */
 483                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 484                                             inccb->ccb_h.path_id,
 485                                             inccb->ccb_h.target_id,
 486                                             inccb->ccb_h.target_lun) !=
 487                                             CAM_REQ_CMP){
 488                                 error = EINVAL;
 489                                 xpt_free_ccb(ccb);
 490                                 break;
 491                         }
 492                         /* Ensure all of our fields are correct */
 493                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 494                                       inccb->ccb_h.pinfo.priority);
 495                         xpt_merge_ccb(ccb, inccb);
 496                         xpt_path_lock(ccb->ccb_h.path);
 497                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 498                         xpt_path_unlock(ccb->ccb_h.path);
 499                         bcopy(ccb, inccb, sizeof(union ccb));
 500                         xpt_free_path(ccb->ccb_h.path);
 501                         xpt_free_ccb(ccb);
 502                         break;
 503
 504                 case XPT_DEBUG: {
 505                         union ccb ccb;
 506
 507                         /*
 508                          * This is an immediate CCB, so it's okay to
 509                          * allocate it on the stack.
 510                          */
 511
 512                         /*
 513                          * Create a path using the bus, target, and lun the
 514                          * user passed in.
 515                          */
 516                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 517                                             inccb->ccb_h.path_id,
 518                                             inccb->ccb_h.target_id,
 519                                             inccb->ccb_h.target_lun) !=
 520                                             CAM_REQ_CMP){
 521                                 error = EINVAL;
 522                                 break;
 523                         }
 524                         /* Ensure all of our fields are correct */
 525                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 526                                       inccb->ccb_h.pinfo.priority);
 527                         xpt_merge_ccb(&ccb, inccb);
 528                         xpt_action(&ccb);
 529                         bcopy(&ccb, inccb, sizeof(union ccb));
 530                         xpt_free_path(ccb.ccb_h.path);
 531                         break;
 532
 533                 }
 534                 case XPT_DEV_MATCH: {
 535                         struct cam_periph_map_info mapinfo;
 536                         struct cam_path *old_path;
 537
 538                         /*
 539                          * We can't deal with physical addresses for this
 540                          * type of transaction.
 541                          */
 542                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 543                             CAM_DATA_VADDR) {
 544                                 error = EINVAL;
 545                                 break;
 546                         }
 547
 548                         /*
 549                          * Save this in case the caller had it set to
 550                          * something in particular.
 551                          */
 552                         old_path = inccb->ccb_h.path;
 553
 554                         /*
 555                          * We really don't need a path for the matching
 556                          * code.  The path is needed because of the
 557                          * debugging statements in xpt_action().  They
 558                          * assume that the CCB has a valid path.
 559                          */
 560                         inccb->ccb_h.path = xpt_periph->path;
 561
 562                         bzero(&mapinfo, sizeof(mapinfo));
 563
 564                         /*
 565                          * Map the pattern and match buffers into kernel
 566                          * virtual address space.
 567                          */
 568                         error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS);
 569
 570                         if (error) {
 571                                 inccb->ccb_h.path = old_path;
 572                                 break;
 573                         }
 574
 575                         /*
 576                          * This is an immediate CCB, we can send it on directly.
 577                          */
 578                         xpt_action(inccb);
 579
 580                         /*
 581                          * Map the buffers back into user space.
 582                          */
 583                         cam_periph_unmapmem(inccb, &mapinfo);
 584
 585                         inccb->ccb_h.path = old_path;
 586
 587                         error = 0;
 588                         break;
 589                 }
 590                 default:
 591                         error = ENOTSUP;
 592                         break;
 593                 }
 594                 xpt_release_bus(bus);
 595                 break;
 596         }
 597         /*
 598          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 599          * with the periphal driver name and unit name filled in.  The other
 600          * fields don't really matter as input.  The passthrough driver name
 601          * ("pass"), and unit number are passed back in the ccb.  The current
 602          * device generation number, and the index into the device peripheral
 603          * driver list, and the status are also passed back.  Note that
 604          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 605          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 606          * (or rather should be) impossible for the device peripheral driver
 607          * list to change since we look at the whole thing in one pass, and
 608          * we do it with lock protection.
 609          *
 610          */
 611         case CAMGETPASSTHRU: {
 612                 union ccb *ccb;
 613                 struct cam_periph *periph;
 614                 struct periph_driver **p_drv;
 615                 char   *name;
 616                 u_int unit;
 617                 int base_periph_found;
 618
 619                 ccb = (union ccb *)addr;
 620                 unit = ccb->cgdl.unit_number;
 621                 name = ccb->cgdl.periph_name;
 622                 base_periph_found = 0;
 623 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 624                 if (ccb->ccb_h.func_code == XPT_SCSI_IO)
 625                         ccb->csio.bio = NULL;
 626 #endif
 627
 628                 /*
 629                  * Sanity check -- make sure we don't get a null peripheral
 630                  * driver name.
 631                  */
 632                 if (*ccb->cgdl.periph_name == '\0') {
 633                         error = EINVAL;
 634                         break;
 635                 }
 636
 637                 /* Keep the list from changing while we traverse it */
 638                 xpt_lock_buses();
 639
 640                 /* first find our driver in the list of drivers */
 641                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 642                         if (strcmp((*p_drv)->driver_name, name) == 0)
 643                                 break;
 644
 645                 if (*p_drv == NULL) {
 646                         xpt_unlock_buses();
 647                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 648                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 649                         *ccb->cgdl.periph_name = '\0';
 650                         ccb->cgdl.unit_number = 0;
 651                         error = ENOENT;
 652                         break;
 653                 }
 654
 655                 /*
 656                  * Run through every peripheral instance of this driver
 657                  * and check to see whether it matches the unit passed
 658                  * in by the user.  If it does, get out of the loops and
 659                  * find the passthrough driver associated with that
 660                  * peripheral driver.
 661                  */
 662                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 663                      periph = TAILQ_NEXT(periph, unit_links)) {
 664
 665                         if (periph->unit_number == unit)
 666                                 break;
 667                 }
 668                 /*
 669                  * If we found the peripheral driver that the user passed
 670                  * in, go through all of the peripheral drivers for that
 671                  * particular device and look for a passthrough driver.
 672                  */
 673                 if (periph != NULL) {
 674                         struct cam_ed *device;
 675                         int i;
 676
 677                         base_periph_found = 1;
 678                         device = periph->path->device;
 679                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 680                              periph != NULL;
 681                              periph = SLIST_NEXT(periph, periph_links), i++) {
 682                                 /*
 683                                  * Check to see whether we have a
 684                                  * passthrough device or not.
 685                                  */
 686                                 if (strcmp(periph->periph_name, "pass") == 0) {
 687                                         /*
 688                                          * Fill in the getdevlist fields.
 689                                          */
 690                                         strlcpy(ccb->cgdl.periph_name,
 691                                                periph->periph_name,
 692                                                sizeof(ccb->cgdl.periph_name));
 693                                         ccb->cgdl.unit_number =
 694                                                 periph->unit_number;
 695                                         if (SLIST_NEXT(periph, periph_links))
 696                                                 ccb->cgdl.status =
 697                                                         CAM_GDEVLIST_MORE_DEVS;
 698                                         else
 699                                                 ccb->cgdl.status =
 700                                                        CAM_GDEVLIST_LAST_DEVICE;
 701                                         ccb->cgdl.generation =
 702                                                 device->generation;
 703                                         ccb->cgdl.index = i;
 704                                         /*
 705                                          * Fill in some CCB header fields
 706                                          * that the user may want.
 707                                          */
 708                                         ccb->ccb_h.path_id =
 709                                                 periph->path->bus->path_id;
 710                                         ccb->ccb_h.target_id =
 711                                                 periph->path->target->target_id;
 712                                         ccb->ccb_h.target_lun =
 713                                                 periph->path->device->lun_id;
 714                                         ccb->ccb_h.status = CAM_REQ_CMP;
 715                                         break;
 716                                 }
 717                         }
 718                 }
 719
 720                 /*
 721                  * If the periph is null here, one of two things has
 722                  * happened.  The first possibility is that we couldn't
 723                  * find the unit number of the particular peripheral driver
 724                  * that the user is asking about.  e.g. the user asks for
 725                  * the passthrough driver for "da11".  We find the list of
 726                  * "da" peripherals all right, but there is no unit 11.
 727                  * The other possibility is that we went through the list
 728                  * of peripheral drivers attached to the device structure,
 729                  * but didn't find one with the name "pass".  Either way,
 730                  * we return ENOENT, since we couldn't find something.
 731                  */
 732                 if (periph == NULL) {
 733                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 734                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 735                         *ccb->cgdl.periph_name = '\0';
 736                         ccb->cgdl.unit_number = 0;
 737                         error = ENOENT;
 738                         /*
 739                          * It is unfortunate that this is even necessary,
 740                          * but there are many, many clueless users out there.
 741                          * If this is true, the user is looking for the
 742                          * passthrough driver, but doesn't have one in his
 743                          * kernel.
 744                          */
 745                         if (base_periph_found == 1) {
 746                                 printf("xptioctl: pass driver is not in the "
 747                                        "kernel\n");
 748                                 printf("xptioctl: put \"device pass\" in "
 749                                        "your kernel config file\n");
 750                         }
 751                 }
 752                 xpt_unlock_buses();
 753                 break;
 754                 }
 755         default:
 756                 error = ENOTTY;
 757                 break;
 758         }
 759
 760         return(error);
 761 }
 762
 763 static int
 764 cam_module_event_handler(module_t mod, int what, void *arg)
 765 {
 766         int error;
 767
 768         switch (what) {
 769         case MOD_LOAD:
 770                 if ((error = xpt_init(NULL)) != 0)
 771                         return (error);
 772                 break;
 773         case MOD_UNLOAD:
 774                 return EBUSY;
 775         default:
 776                 return EOPNOTSUPP;
 777         }
 778
 779         return 0;
 780 }
 781
 782 static struct xpt_proto *
 783 xpt_proto_find(cam_proto proto)
 784 {
 785         struct xpt_proto **pp;
 786
 787         SET_FOREACH(pp, cam_xpt_proto_set) {
 788                 if ((*pp)->proto == proto)
 789                         return *pp;
 790         }
 791
 792         return NULL;
 793 }
 794
 795 static void
 796 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 797 {
 798
 799         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 800                 xpt_free_path(done_ccb->ccb_h.path);
 801                 xpt_free_ccb(done_ccb);
 802         } else {
 803                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 804                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 805         }
 806         xpt_release_boot();
 807 }
 808
 809 /* thread to handle bus rescans */
 810 static void
 811 xpt_scanner_thread(void *dummy)
 812 {
 813         union ccb       *ccb;
 814         struct cam_path  path;
 815
 816         xpt_lock_buses();
 817         for (;;) {
 818                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 819                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 820                                "-", 0);
 821                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 822                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 823                         xpt_unlock_buses();
 824
 825                         /*
 826                          * Since lock can be dropped inside and path freed
 827                          * by completion callback even before return here,
 828                          * take our own path copy for reference.
 829                          */
 830                         xpt_copy_path(&path, ccb->ccb_h.path);
 831                         xpt_path_lock(&path);
 832                         xpt_action(ccb);
 833                         xpt_path_unlock(&path);
 834                         xpt_release_path(&path);
 835
 836                         xpt_lock_buses();
 837                 }
 838         }
 839 }
 840
 841 void
 842 xpt_rescan(union ccb *ccb)
 843 {
 844         struct ccb_hdr *hdr;
 845
 846         /* Prepare request */
 847         if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
 848             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 849                 ccb->ccb_h.func_code = XPT_SCAN_BUS;
 850         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 851             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 852                 ccb->ccb_h.func_code = XPT_SCAN_TGT;
 853         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 854             ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
 855                 ccb->ccb_h.func_code = XPT_SCAN_LUN;
 856         else {
 857                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 858                 xpt_free_path(ccb->ccb_h.path);
 859                 xpt_free_ccb(ccb);
 860                 return;
 861         }
 862         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
 863             ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code,
 864                 xpt_action_name(ccb->ccb_h.func_code)));
 865
 866         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 867         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 868         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 869         /* Don't make duplicate entries for the same paths. */
 870         xpt_lock_buses();
 871         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 872                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 873                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 874                                 wakeup(&xsoftc.ccb_scanq);
 875                                 xpt_unlock_buses();
 876                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 877                                 xpt_free_path(ccb->ccb_h.path);
 878                                 xpt_free_ccb(ccb);
 879                                 return;
 880                         }
 881                 }
 882         }
 883         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 884         xsoftc.buses_to_config++;
 885         wakeup(&xsoftc.ccb_scanq);
 886         xpt_unlock_buses();
 887 }
 888
 889 /* Functions accessed by the peripheral drivers */
 890 static int
 891 xpt_init(void *dummy)
 892 {
 893         struct cam_sim *xpt_sim;
 894         struct cam_path *path;
 895         struct cam_devq *devq;
 896         cam_status status;
 897         int error, i;
 898
 899         TAILQ_INIT(&xsoftc.xpt_busses);
 900         TAILQ_INIT(&xsoftc.ccb_scanq);
 901         STAILQ_INIT(&xsoftc.highpowerq);
 902         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 903
 904         mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
 905         mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
 906         xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
 907             taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
 908
 909 #ifdef CAM_BOOT_DELAY
 910         /*
 911          * Override this value at compile time to assist our users
 912          * who don't use loader to boot a kernel.
 913          */
 914         xsoftc.boot_delay = CAM_BOOT_DELAY;
 915 #endif
 916         /*
 917          * The xpt layer is, itself, the equivalent of a SIM.
 918          * Allow 16 ccbs in the ccb pool for it.  This should
 919          * give decent parallelism when we probe buses and
 920          * perform other XPT functions.
 921          */
 922         devq = cam_simq_alloc(16);
 923         xpt_sim = cam_sim_alloc(xptaction,
 924                                 xptpoll,
 925                                 "xpt",
 926                                 /*softc*/NULL,
 927                                 /*unit*/0,
 928                                 /*mtx*/&xsoftc.xpt_lock,
 929                                 /*max_dev_transactions*/0,
 930                                 /*max_tagged_dev_transactions*/0,
 931                                 devq);
 932         if (xpt_sim == NULL)
 933                 return (ENOMEM);
 934
 935         mtx_lock(&xsoftc.xpt_lock);
 936         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 937                 mtx_unlock(&xsoftc.xpt_lock);
 938                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 939                        " failing attach\n", status);
 940                 return (EINVAL);
 941         }
 942         mtx_unlock(&xsoftc.xpt_lock);
 943
 944         /*
 945          * Looking at the XPT from the SIM layer, the XPT is
 946          * the equivalent of a peripheral driver.  Allocate
 947          * a peripheral driver entry for us.
 948          */
 949         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 950                                       CAM_TARGET_WILDCARD,
 951                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 952                 printf("xpt_init: xpt_create_path failed with status %#x,"
 953                        " failing attach\n", status);
 954                 return (EINVAL);
 955         }
 956         xpt_path_lock(path);
 957         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 958                          path, NULL, 0, xpt_sim);
 959         xpt_path_unlock(path);
 960         xpt_free_path(path);
 961
 962         if (cam_num_doneqs < 1)
 963                 cam_num_doneqs = 1 + mp_ncpus / 6;
 964         else if (cam_num_doneqs > MAXCPU)
 965                 cam_num_doneqs = MAXCPU;
 966         for (i = 0; i < cam_num_doneqs; i++) {
 967                 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 968                     MTX_DEF);
 969                 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
 970                 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 971                     &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 972                 if (error != 0) {
 973                         cam_num_doneqs = i;
 974                         break;
 975                 }
 976         }
 977         if (cam_num_doneqs < 1) {
 978                 printf("xpt_init: Cannot init completion queues "
 979                        "- failing attach\n");
 980                 return (ENOMEM);
 981         }
 982         /*
 983          * Register a callback for when interrupts are enabled.
 984          */
 985         xsoftc.xpt_config_hook =
 986             (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
 987                                               M_CAMXPT, M_NOWAIT | M_ZERO);
 988         if (xsoftc.xpt_config_hook == NULL) {
 989                 printf("xpt_init: Cannot malloc config hook "
 990                        "- failing attach\n");
 991                 return (ENOMEM);
 992         }
 993         xsoftc.xpt_config_hook->ich_func = xpt_config;
 994         if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
 995                 free (xsoftc.xpt_config_hook, M_CAMXPT);
 996                 printf("xpt_init: config_intrhook_establish failed "
 997                        "- failing attach\n");
 998         }
 999
1000         return (0);
1001 }
1002
1003 static cam_status
1004 xptregister(struct cam_periph *periph, void *arg)
1005 {
1006         struct cam_sim *xpt_sim;
1007
1008         if (periph == NULL) {
1009                 printf("xptregister: periph was NULL!!\n");
1010                 return(CAM_REQ_CMP_ERR);
1011         }
1012
1013         xpt_sim = (struct cam_sim *)arg;
1014         xpt_sim->softc = periph;
1015         xpt_periph = periph;
1016         periph->softc = NULL;
1017
1018         return(CAM_REQ_CMP);
1019 }
1020
1021 int32_t
1022 xpt_add_periph(struct cam_periph *periph)
1023 {
1024         struct cam_ed *device;
1025         int32_t  status;
1026
1027         TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
1028         device = periph->path->device;
1029         status = CAM_REQ_CMP;
1030         if (device != NULL) {
1031                 mtx_lock(&device->target->bus->eb_mtx);
1032                 device->generation++;
1033                 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
1034                 mtx_unlock(&device->target->bus->eb_mtx);
1035                 atomic_add_32(&xsoftc.xpt_generation, 1);
1036         }
1037
1038         return (status);
1039 }
1040
1041 void
1042 xpt_remove_periph(struct cam_periph *periph)
1043 {
1044         struct cam_ed *device;
1045
1046         device = periph->path->device;
1047         if (device != NULL) {
1048                 mtx_lock(&device->target->bus->eb_mtx);
1049                 device->generation++;
1050                 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1051                 mtx_unlock(&device->target->bus->eb_mtx);
1052                 atomic_add_32(&xsoftc.xpt_generation, 1);
1053         }
1054 }
1055
1056
1057 void
1058 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1059 {
1060         struct  cam_path *path = periph->path;
1061         struct  xpt_proto *proto;
1062
1063         cam_periph_assert(periph, MA_OWNED);
1064         periph->flags |= CAM_PERIPH_ANNOUNCED;
1065
1066         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1067                periph->periph_name, periph->unit_number,
1068                path->bus->sim->sim_name,
1069                path->bus->sim->unit_number,
1070                path->bus->sim->bus_id,
1071                path->bus->path_id,
1072                path->target->target_id,
1073                (uintmax_t)path->device->lun_id);
1074         printf("%s%d: ", periph->periph_name, periph->unit_number);
1075         proto = xpt_proto_find(path->device->protocol);
1076         if (proto)
1077                 proto->ops->announce(path->device);
1078         else
1079                 printf("%s%d: Unknown protocol device %d\n",
1080                     periph->periph_name, periph->unit_number,
1081                     path->device->protocol);
1082         if (path->device->serial_num_len > 0) {
1083                 /* Don't wrap the screen  - print only the first 60 chars */
1084                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1085                        periph->unit_number, path->device->serial_num);
1086         }
1087         /* Announce transport details. */
1088         path->bus->xport->ops->announce(periph);
1089         /* Announce command queueing. */
1090         if (path->device->inq_flags & SID_CmdQue
1091          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1092                 printf("%s%d: Command Queueing enabled\n",
1093                        periph->periph_name, periph->unit_number);
1094         }
1095         /* Announce caller's details if they've passed in. */
1096         if (announce_string != NULL)
1097                 printf("%s%d: %s\n", periph->periph_name,
1098                        periph->unit_number, announce_string);
1099 }
1100
1101 void
1102 xpt_announce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb,
1103     char *announce_string)
1104 {
1105         struct  cam_path *path = periph->path;
1106         struct  xpt_proto *proto;
1107
1108         cam_periph_assert(periph, MA_OWNED);
1109         periph->flags |= CAM_PERIPH_ANNOUNCED;
1110
1111         /* Fall back to the non-sbuf method if necessary */
1112         if (xsoftc.announce_nosbuf != 0) {
1113                 xpt_announce_periph(periph, announce_string);
1114                 return;
1115         }
1116         proto = xpt_proto_find(path->device->protocol);
1117         if (((proto != NULL) && (proto->ops->announce_sbuf == NULL)) ||
1118             (path->bus->xport->ops->announce_sbuf == NULL)) {
1119                 xpt_announce_periph(periph, announce_string);
1120                 return;
1121         }
1122
1123         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1124             periph->periph_name, periph->unit_number,
1125             path->bus->sim->sim_name,
1126             path->bus->sim->unit_number,
1127             path->bus->sim->bus_id,
1128             path->bus->path_id,
1129             path->target->target_id,
1130             (uintmax_t)path->device->lun_id);
1131         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1132
1133         if (proto)
1134                 proto->ops->announce_sbuf(path->device, sb);
1135         else
1136                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1137                     periph->periph_name, periph->unit_number,
1138                     path->device->protocol);
1139         if (path->device->serial_num_len > 0) {
1140                 /* Don't wrap the screen  - print only the first 60 chars */
1141                 sbuf_printf(sb, "%s%d: Serial Number %.60s\n",
1142                     periph->periph_name, periph->unit_number,
1143                     path->device->serial_num);
1144         }
1145         /* Announce transport details. */
1146         path->bus->xport->ops->announce_sbuf(periph, sb);
1147         /* Announce command queueing. */
1148         if (path->device->inq_flags & SID_CmdQue
1149          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1150                 sbuf_printf(sb, "%s%d: Command Queueing enabled\n",
1151                     periph->periph_name, periph->unit_number);
1152         }
1153         /* Announce caller's details if they've passed in. */
1154         if (announce_string != NULL)
1155                 sbuf_printf(sb, "%s%d: %s\n", periph->periph_name,
1156                     periph->unit_number, announce_string);
1157 }
1158
1159 void
1160 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1161 {
1162         if (quirks != 0) {
1163                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1164                     periph->unit_number, quirks, bit_string);
1165         }
1166 }
1167
1168 void
1169 xpt_announce_quirks_sbuf(struct cam_periph *periph, struct sbuf *sb,
1170                          int quirks, char *bit_string)
1171 {
1172         if (xsoftc.announce_nosbuf != 0) {
1173                 xpt_announce_quirks(periph, quirks, bit_string);
1174                 return;
1175         }
1176
1177         if (quirks != 0) {
1178                 sbuf_printf(sb, "%s%d: quirks=0x%b\n", periph->periph_name,
1179                     periph->unit_number, quirks, bit_string);
1180         }
1181 }
1182
1183 void
1184 xpt_denounce_periph(struct cam_periph *periph)
1185 {
1186         struct  cam_path *path = periph->path;
1187         struct  xpt_proto *proto;
1188
1189         cam_periph_assert(periph, MA_OWNED);
1190         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1191                periph->periph_name, periph->unit_number,
1192                path->bus->sim->sim_name,
1193                path->bus->sim->unit_number,
1194                path->bus->sim->bus_id,
1195                path->bus->path_id,
1196                path->target->target_id,
1197                (uintmax_t)path->device->lun_id);
1198         printf("%s%d: ", periph->periph_name, periph->unit_number);
1199         proto = xpt_proto_find(path->device->protocol);
1200         if (proto)
1201                 proto->ops->denounce(path->device);
1202         else
1203                 printf("%s%d: Unknown protocol device %d\n",
1204                     periph->periph_name, periph->unit_number,
1205                     path->device->protocol);
1206         if (path->device->serial_num_len > 0)
1207                 printf(" s/n %.60s", path->device->serial_num);
1208         printf(" detached\n");
1209 }
1210
1211 void
1212 xpt_denounce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb)
1213 {
1214         struct cam_path *path = periph->path;
1215         struct xpt_proto *proto;
1216
1217         cam_periph_assert(periph, MA_OWNED);
1218
1219         /* Fall back to the non-sbuf method if necessary */
1220         if (xsoftc.announce_nosbuf != 0) {
1221                 xpt_denounce_periph(periph);
1222                 return;
1223         }
1224         proto = xpt_proto_find(path->device->protocol);
1225         if ((proto != NULL) && (proto->ops->denounce_sbuf == NULL)) {
1226                 xpt_denounce_periph(periph);
1227                 return;
1228         }
1229
1230         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1231             periph->periph_name, periph->unit_number,
1232             path->bus->sim->sim_name,
1233             path->bus->sim->unit_number,
1234             path->bus->sim->bus_id,
1235             path->bus->path_id,
1236             path->target->target_id,
1237             (uintmax_t)path->device->lun_id);
1238         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1239
1240         if (proto)
1241                 proto->ops->denounce_sbuf(path->device, sb);
1242         else
1243                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1244                     periph->periph_name, periph->unit_number,
1245                     path->device->protocol);
1246         if (path->device->serial_num_len > 0)
1247                 sbuf_printf(sb, " s/n %.60s", path->device->serial_num);
1248         sbuf_printf(sb, " detached\n");
1249 }
1250
1251 int
1252 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1253 {
1254         int ret = -1, l, o;
1255         struct ccb_dev_advinfo cdai;
1256         struct scsi_vpd_device_id *did;
1257         struct scsi_vpd_id_descriptor *idd;
1258
1259         xpt_path_assert(path, MA_OWNED);
1260
1261         memset(&cdai, 0, sizeof(cdai));
1262         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1263         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1264         cdai.flags = CDAI_FLAG_NONE;
1265         cdai.bufsiz = len;
1266         cdai.buf = buf;
1267
1268         if (!strcmp(attr, "GEOM::ident"))
1269                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1270         else if (!strcmp(attr, "GEOM::physpath"))
1271                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1272         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1273                  strcmp(attr, "GEOM::lunname") == 0) {
1274                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1275                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1276                 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT);
1277                 if (cdai.buf == NULL) {
1278                         ret = ENOMEM;
1279                         goto out;
1280                 }
1281         } else
1282                 goto out;
1283
1284         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1285         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1286                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1287         if (cdai.provsiz == 0)
1288                 goto out;
1289         switch(cdai.buftype) {
1290         case CDAI_TYPE_SCSI_DEVID:
1291                 did = (struct scsi_vpd_device_id *)cdai.buf;
1292                 if (strcmp(attr, "GEOM::lunid") == 0) {
1293                         idd = scsi_get_devid(did, cdai.provsiz,
1294                             scsi_devid_is_lun_naa);
1295                         if (idd == NULL)
1296                                 idd = scsi_get_devid(did, cdai.provsiz,
1297                                     scsi_devid_is_lun_eui64);
1298                         if (idd == NULL)
1299                                 idd = scsi_get_devid(did, cdai.provsiz,
1300                                     scsi_devid_is_lun_uuid);
1301                         if (idd == NULL)
1302                                 idd = scsi_get_devid(did, cdai.provsiz,
1303                                     scsi_devid_is_lun_md5);
1304                 } else
1305                         idd = NULL;
1306
1307                 if (idd == NULL)
1308                         idd = scsi_get_devid(did, cdai.provsiz,
1309                             scsi_devid_is_lun_t10);
1310                 if (idd == NULL)
1311                         idd = scsi_get_devid(did, cdai.provsiz,
1312                             scsi_devid_is_lun_name);
1313                 if (idd == NULL)
1314                         break;
1315
1316                 ret = 0;
1317                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) ==
1318                     SVPD_ID_CODESET_ASCII) {
1319                         if (idd->length < len) {
1320                                 for (l = 0; l < idd->length; l++)
1321                                         buf[l] = idd->identifier[l] ?
1322                                             idd->identifier[l] : ' ';
1323                                 buf[l] = 0;
1324                         } else
1325                                 ret = EFAULT;
1326                         break;
1327                 }
1328                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) ==
1329                     SVPD_ID_CODESET_UTF8) {
1330                         l = strnlen(idd->identifier, idd->length);
1331                         if (l < len) {
1332                                 bcopy(idd->identifier, buf, l);
1333                                 buf[l] = 0;
1334                         } else
1335                                 ret = EFAULT;
1336                         break;
1337                 }
1338                 if ((idd->id_type & SVPD_ID_TYPE_MASK) ==
1339                     SVPD_ID_TYPE_UUID && idd->identifier[0] == 0x10) {
1340                         if ((idd->length - 2) * 2 + 4 >= len) {
1341                                 ret = EFAULT;
1342                                 break;
1343                         }
1344                         for (l = 2, o = 0; l < idd->length; l++) {
1345                                 if (l == 6 || l == 8 || l == 10 || l == 12)
1346                                     o += sprintf(buf + o, "-");
1347                                 o += sprintf(buf + o, "%02x",
1348                                     idd->identifier[l]);
1349                         }
1350                         break;
1351                 }
1352                 if (idd->length * 2 < len) {
1353                         for (l = 0; l < idd->length; l++)
1354                                 sprintf(buf + l * 2, "%02x",
1355                                     idd->identifier[l]);
1356                 } else
1357                                 ret = EFAULT;
1358                 break;
1359         default:
1360                 if (cdai.provsiz < len) {
1361                         cdai.buf[cdai.provsiz] = 0;
1362                         ret = 0;
1363                 } else
1364                         ret = EFAULT;
1365                 break;
1366         }
1367
1368 out:
1369         if ((char *)cdai.buf != buf)
1370                 free(cdai.buf, M_CAMXPT);
1371         return ret;
1372 }
1373
1374 static dev_match_ret
1375 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1376             struct cam_eb *bus)
1377 {
1378         dev_match_ret retval;
1379         u_int i;
1380
1381         retval = DM_RET_NONE;
1382
1383         /*
1384          * If we aren't given something to match against, that's an error.
1385          */
1386         if (bus == NULL)
1387                 return(DM_RET_ERROR);
1388
1389         /*
1390          * If there are no match entries, then this bus matches no
1391          * matter what.
1392          */
1393         if ((patterns == NULL) || (num_patterns == 0))
1394                 return(DM_RET_DESCEND | DM_RET_COPY);
1395
1396         for (i = 0; i < num_patterns; i++) {
1397                 struct bus_match_pattern *cur_pattern;
1398
1399                 /*
1400                  * If the pattern in question isn't for a bus node, we
1401                  * aren't interested.  However, we do indicate to the
1402                  * calling routine that we should continue descending the
1403                  * tree, since the user wants to match against lower-level
1404                  * EDT elements.
1405                  */
1406                 if (patterns[i].type != DEV_MATCH_BUS) {
1407                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1408                                 retval |= DM_RET_DESCEND;
1409                         continue;
1410                 }
1411
1412                 cur_pattern = &patterns[i].pattern.bus_pattern;
1413
1414                 /*
1415                  * If they want to match any bus node, we give them any
1416                  * device node.
1417                  */
1418                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1419                         /* set the copy flag */
1420                         retval |= DM_RET_COPY;
1421
1422                         /*
1423                          * If we've already decided on an action, go ahead
1424                          * and return.
1425                          */
1426                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1427                                 return(retval);
1428                 }
1429
1430                 /*
1431                  * Not sure why someone would do this...
1432                  */
1433                 if (cur_pattern->flags == BUS_MATCH_NONE)
1434                         continue;
1435
1436                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1437                  && (cur_pattern->path_id != bus->path_id))
1438                         continue;
1439
1440                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1441                  && (cur_pattern->bus_id != bus->sim->bus_id))
1442                         continue;
1443
1444                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1445                  && (cur_pattern->unit_number != bus->sim->unit_number))
1446                         continue;
1447
1448                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1449                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1450                              DEV_IDLEN) != 0))
1451                         continue;
1452
1453                 /*
1454                  * If we get to this point, the user definitely wants
1455                  * information on this bus.  So tell the caller to copy the
1456                  * data out.
1457                  */
1458                 retval |= DM_RET_COPY;
1459
1460                 /*
1461                  * If the return action has been set to descend, then we
1462                  * know that we've already seen a non-bus matching
1463                  * expression, therefore we need to further descend the tree.
1464                  * This won't change by continuing around the loop, so we
1465                  * go ahead and return.  If we haven't seen a non-bus
1466                  * matching expression, we keep going around the loop until
1467                  * we exhaust the matching expressions.  We'll set the stop
1468                  * flag once we fall out of the loop.
1469                  */
1470                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1471                         return(retval);
1472         }
1473
1474         /*
1475          * If the return action hasn't been set to descend yet, that means
1476          * we haven't seen anything other than bus matching patterns.  So
1477          * tell the caller to stop descending the tree -- the user doesn't
1478          * want to match against lower level tree elements.
1479          */
1480         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1481                 retval |= DM_RET_STOP;
1482
1483         return(retval);
1484 }
1485
1486 static dev_match_ret
1487 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1488                struct cam_ed *device)
1489 {
1490         dev_match_ret retval;
1491         u_int i;
1492
1493         retval = DM_RET_NONE;
1494
1495         /*
1496          * If we aren't given something to match against, that's an error.
1497          */
1498         if (device == NULL)
1499                 return(DM_RET_ERROR);
1500
1501         /*
1502          * If there are no match entries, then this device matches no
1503          * matter what.
1504          */
1505         if ((patterns == NULL) || (num_patterns == 0))
1506                 return(DM_RET_DESCEND | DM_RET_COPY);
1507
1508         for (i = 0; i < num_patterns; i++) {
1509                 struct device_match_pattern *cur_pattern;
1510                 struct scsi_vpd_device_id *device_id_page;
1511
1512                 /*
1513                  * If the pattern in question isn't for a device node, we
1514                  * aren't interested.
1515                  */
1516                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1517                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1518                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1519                                 retval |= DM_RET_DESCEND;
1520                         continue;
1521                 }
1522
1523                 cur_pattern = &patterns[i].pattern.device_pattern;
1524
1525                 /* Error out if mutually exclusive options are specified. */
1526                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1527                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1528                         return(DM_RET_ERROR);
1529
1530                 /*
1531                  * If they want to match any device node, we give them any
1532                  * device node.
1533                  */
1534                 if (cur_pattern->flags == DEV_MATCH_ANY)
1535                         goto copy_dev_node;
1536
1537                 /*
1538                  * Not sure why someone would do this...
1539                  */
1540                 if (cur_pattern->flags == DEV_MATCH_NONE)
1541                         continue;
1542
1543                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1544                  && (cur_pattern->path_id != device->target->bus->path_id))
1545                         continue;
1546
1547                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1548                  && (cur_pattern->target_id != device->target->target_id))
1549                         continue;
1550
1551                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1552                  && (cur_pattern->target_lun != device->lun_id))
1553                         continue;
1554
1555                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1556                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1557                                     (caddr_t)&cur_pattern->data.inq_pat,
1558                                     1, sizeof(cur_pattern->data.inq_pat),
1559                                     scsi_static_inquiry_match) == NULL))
1560                         continue;
1561
1562                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1563                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1564                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1565                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1566                                       device->device_id_len
1567                                     - SVPD_DEVICE_ID_HDR_LEN,
1568                                       cur_pattern->data.devid_pat.id,
1569                                       cur_pattern->data.devid_pat.id_len) != 0))
1570                         continue;
1571
1572 copy_dev_node:
1573                 /*
1574                  * If we get to this point, the user definitely wants
1575                  * information on this device.  So tell the caller to copy
1576                  * the data out.
1577                  */
1578                 retval |= DM_RET_COPY;
1579
1580                 /*
1581                  * If the return action has been set to descend, then we
1582                  * know that we've already seen a peripheral matching
1583                  * expression, therefore we need to further descend the tree.
1584                  * This won't change by continuing around the loop, so we
1585                  * go ahead and return.  If we haven't seen a peripheral
1586                  * matching expression, we keep going around the loop until
1587                  * we exhaust the matching expressions.  We'll set the stop
1588                  * flag once we fall out of the loop.
1589                  */
1590                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1591                         return(retval);
1592         }
1593
1594         /*
1595          * If the return action hasn't been set to descend yet, that means
1596          * we haven't seen any peripheral matching patterns.  So tell the
1597          * caller to stop descending the tree -- the user doesn't want to
1598          * match against lower level tree elements.
1599          */
1600         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1601                 retval |= DM_RET_STOP;
1602
1603         return(retval);
1604 }
1605
1606 /*
1607  * Match a single peripheral against any number of match patterns.
1608  */
1609 static dev_match_ret
1610 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1611                struct cam_periph *periph)
1612 {
1613         dev_match_ret retval;
1614         u_int i;
1615
1616         /*
1617          * If we aren't given something to match against, that's an error.
1618          */
1619         if (periph == NULL)
1620                 return(DM_RET_ERROR);
1621
1622         /*
1623          * If there are no match entries, then this peripheral matches no
1624          * matter what.
1625          */
1626         if ((patterns == NULL) || (num_patterns == 0))
1627                 return(DM_RET_STOP | DM_RET_COPY);
1628
1629         /*
1630          * There aren't any nodes below a peripheral node, so there's no
1631          * reason to descend the tree any further.
1632          */
1633         retval = DM_RET_STOP;
1634
1635         for (i = 0; i < num_patterns; i++) {
1636                 struct periph_match_pattern *cur_pattern;
1637
1638                 /*
1639                  * If the pattern in question isn't for a peripheral, we
1640                  * aren't interested.
1641                  */
1642                 if (patterns[i].type != DEV_MATCH_PERIPH)
1643                         continue;
1644
1645                 cur_pattern = &patterns[i].pattern.periph_pattern;
1646
1647                 /*
1648                  * If they want to match on anything, then we will do so.
1649                  */
1650                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1651                         /* set the copy flag */
1652                         retval |= DM_RET_COPY;
1653
1654                         /*
1655                          * We've already set the return action to stop,
1656                          * since there are no nodes below peripherals in
1657                          * the tree.
1658                          */
1659                         return(retval);
1660                 }
1661
1662                 /*
1663                  * Not sure why someone would do this...
1664                  */
1665                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1666                         continue;
1667
1668                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1669                  && (cur_pattern->path_id != periph->path->bus->path_id))
1670                         continue;
1671
1672                 /*
1673                  * For the target and lun id's, we have to make sure the
1674                  * target and lun pointers aren't NULL.  The xpt peripheral
1675                  * has a wildcard target and device.
1676                  */
1677                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1678                  && ((periph->path->target == NULL)
1679                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1680                         continue;
1681
1682                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1683                  && ((periph->path->device == NULL)
1684                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1685                         continue;
1686
1687                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1688                  && (cur_pattern->unit_number != periph->unit_number))
1689                         continue;
1690
1691                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1692                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1693                              DEV_IDLEN) != 0))
1694                         continue;
1695
1696                 /*
1697                  * If we get to this point, the user definitely wants
1698                  * information on this peripheral.  So tell the caller to
1699                  * copy the data out.
1700                  */
1701                 retval |= DM_RET_COPY;
1702
1703                 /*
1704                  * The return action has already been set to stop, since
1705                  * peripherals don't have any nodes below them in the EDT.
1706                  */
1707                 return(retval);
1708         }
1709
1710         /*
1711          * If we get to this point, the peripheral that was passed in
1712          * doesn't match any of the patterns.
1713          */
1714         return(retval);
1715 }
1716
1717 static int
1718 xptedtbusfunc(struct cam_eb *bus, void *arg)
1719 {
1720         struct ccb_dev_match *cdm;
1721         struct cam_et *target;
1722         dev_match_ret retval;
1723
1724         cdm = (struct ccb_dev_match *)arg;
1725
1726         /*
1727          * If our position is for something deeper in the tree, that means
1728          * that we've already seen this node.  So, we keep going down.
1729          */
1730         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1731          && (cdm->pos.cookie.bus == bus)
1732          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1733          && (cdm->pos.cookie.target != NULL))
1734                 retval = DM_RET_DESCEND;
1735         else
1736                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1737
1738         /*
1739          * If we got an error, bail out of the search.
1740          */
1741         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1742                 cdm->status = CAM_DEV_MATCH_ERROR;
1743                 return(0);
1744         }
1745
1746         /*
1747          * If the copy flag is set, copy this bus out.
1748          */
1749         if (retval & DM_RET_COPY) {
1750                 int spaceleft, j;
1751
1752                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1753                         sizeof(struct dev_match_result));
1754
1755                 /*
1756                  * If we don't have enough space to put in another
1757                  * match result, save our position and tell the
1758                  * user there are more devices to check.
1759                  */
1760                 if (spaceleft < sizeof(struct dev_match_result)) {
1761                         bzero(&cdm->pos, sizeof(cdm->pos));
1762                         cdm->pos.position_type =
1763                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1764
1765                         cdm->pos.cookie.bus = bus;
1766                         cdm->pos.generations[CAM_BUS_GENERATION]=
1767                                 xsoftc.bus_generation;
1768                         cdm->status = CAM_DEV_MATCH_MORE;
1769                         return(0);
1770                 }
1771                 j = cdm->num_matches;
1772                 cdm->num_matches++;
1773                 cdm->matches[j].type = DEV_MATCH_BUS;
1774                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1775                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1776                 cdm->matches[j].result.bus_result.unit_number =
1777                         bus->sim->unit_number;
1778                 strlcpy(cdm->matches[j].result.bus_result.dev_name,
1779                         bus->sim->sim_name,
1780                         sizeof(cdm->matches[j].result.bus_result.dev_name));
1781         }
1782
1783         /*
1784          * If the user is only interested in buses, there's no
1785          * reason to descend to the next level in the tree.
1786          */
1787         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1788                 return(1);
1789
1790         /*
1791          * If there is a target generation recorded, check it to
1792          * make sure the target list hasn't changed.
1793          */
1794         mtx_lock(&bus->eb_mtx);
1795         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1796          && (cdm->pos.cookie.bus == bus)
1797          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1798          && (cdm->pos.cookie.target != NULL)) {
1799                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1800                     bus->generation)) {
1801                         mtx_unlock(&bus->eb_mtx);
1802                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1803                         return (0);
1804                 }
1805                 target = (struct cam_et *)cdm->pos.cookie.target;
1806                 target->refcount++;
1807         } else
1808                 target = NULL;
1809         mtx_unlock(&bus->eb_mtx);
1810
1811         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1812 }
1813
1814 static int
1815 xptedttargetfunc(struct cam_et *target, void *arg)
1816 {
1817         struct ccb_dev_match *cdm;
1818         struct cam_eb *bus;
1819         struct cam_ed *device;
1820
1821         cdm = (struct ccb_dev_match *)arg;
1822         bus = target->bus;
1823
1824         /*
1825          * If there is a device list generation recorded, check it to
1826          * make sure the device list hasn't changed.
1827          */
1828         mtx_lock(&bus->eb_mtx);
1829         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1830          && (cdm->pos.cookie.bus == bus)
1831          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1832          && (cdm->pos.cookie.target == target)
1833          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1834          && (cdm->pos.cookie.device != NULL)) {
1835                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1836                     target->generation) {
1837                         mtx_unlock(&bus->eb_mtx);
1838                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1839                         return(0);
1840                 }
1841                 device = (struct cam_ed *)cdm->pos.cookie.device;
1842                 device->refcount++;
1843         } else
1844                 device = NULL;
1845         mtx_unlock(&bus->eb_mtx);
1846
1847         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1848 }
1849
1850 static int
1851 xptedtdevicefunc(struct cam_ed *device, void *arg)
1852 {
1853         struct cam_eb *bus;
1854         struct cam_periph *periph;
1855         struct ccb_dev_match *cdm;
1856         dev_match_ret retval;
1857
1858         cdm = (struct ccb_dev_match *)arg;
1859         bus = device->target->bus;
1860
1861         /*
1862          * If our position is for something deeper in the tree, that means
1863          * that we've already seen this node.  So, we keep going down.
1864          */
1865         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1866          && (cdm->pos.cookie.device == device)
1867          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1868          && (cdm->pos.cookie.periph != NULL))
1869                 retval = DM_RET_DESCEND;
1870         else
1871                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1872                                         device);
1873
1874         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1875                 cdm->status = CAM_DEV_MATCH_ERROR;
1876                 return(0);
1877         }
1878
1879         /*
1880          * If the copy flag is set, copy this device out.
1881          */
1882         if (retval & DM_RET_COPY) {
1883                 int spaceleft, j;
1884
1885                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1886                         sizeof(struct dev_match_result));
1887
1888                 /*
1889                  * If we don't have enough space to put in another
1890                  * match result, save our position and tell the
1891                  * user there are more devices to check.
1892                  */
1893                 if (spaceleft < sizeof(struct dev_match_result)) {
1894                         bzero(&cdm->pos, sizeof(cdm->pos));
1895                         cdm->pos.position_type =
1896                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1897                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1898
1899                         cdm->pos.cookie.bus = device->target->bus;
1900                         cdm->pos.generations[CAM_BUS_GENERATION]=
1901                                 xsoftc.bus_generation;
1902                         cdm->pos.cookie.target = device->target;
1903                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1904                                 device->target->bus->generation;
1905                         cdm->pos.cookie.device = device;
1906                         cdm->pos.generations[CAM_DEV_GENERATION] =
1907                                 device->target->generation;
1908                         cdm->status = CAM_DEV_MATCH_MORE;
1909                         return(0);
1910                 }
1911                 j = cdm->num_matches;
1912                 cdm->num_matches++;
1913                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1914                 cdm->matches[j].result.device_result.path_id =
1915                         device->target->bus->path_id;
1916                 cdm->matches[j].result.device_result.target_id =
1917                         device->target->target_id;
1918                 cdm->matches[j].result.device_result.target_lun =
1919                         device->lun_id;
1920                 cdm->matches[j].result.device_result.protocol =
1921                         device->protocol;
1922                 bcopy(&device->inq_data,
1923                       &cdm->matches[j].result.device_result.inq_data,
1924                       sizeof(struct scsi_inquiry_data));
1925                 bcopy(&device->ident_data,
1926                       &cdm->matches[j].result.device_result.ident_data,
1927                       sizeof(struct ata_params));
1928
1929                 /* Let the user know whether this device is unconfigured */
1930                 if (device->flags & CAM_DEV_UNCONFIGURED)
1931                         cdm->matches[j].result.device_result.flags =
1932                                 DEV_RESULT_UNCONFIGURED;
1933                 else
1934                         cdm->matches[j].result.device_result.flags =
1935                                 DEV_RESULT_NOFLAG;
1936         }
1937
1938         /*
1939          * If the user isn't interested in peripherals, don't descend
1940          * the tree any further.
1941          */
1942         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1943                 return(1);
1944
1945         /*
1946          * If there is a peripheral list generation recorded, make sure
1947          * it hasn't changed.
1948          */
1949         xpt_lock_buses();
1950         mtx_lock(&bus->eb_mtx);
1951         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1952          && (cdm->pos.cookie.bus == bus)
1953          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1954          && (cdm->pos.cookie.target == device->target)
1955          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1956          && (cdm->pos.cookie.device == device)
1957          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1958          && (cdm->pos.cookie.periph != NULL)) {
1959                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1960                     device->generation) {
1961                         mtx_unlock(&bus->eb_mtx);
1962                         xpt_unlock_buses();
1963                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1964                         return(0);
1965                 }
1966                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1967                 periph->refcount++;
1968         } else
1969                 periph = NULL;
1970         mtx_unlock(&bus->eb_mtx);
1971         xpt_unlock_buses();
1972
1973         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1974 }
1975
1976 static int
1977 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1978 {
1979         struct ccb_dev_match *cdm;
1980         dev_match_ret retval;
1981
1982         cdm = (struct ccb_dev_match *)arg;
1983
1984         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1985
1986         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1987                 cdm->status = CAM_DEV_MATCH_ERROR;
1988                 return(0);
1989         }
1990
1991         /*
1992          * If the copy flag is set, copy this peripheral out.
1993          */
1994         if (retval & DM_RET_COPY) {
1995                 int spaceleft, j;
1996                 size_t l;
1997
1998                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1999                         sizeof(struct dev_match_result));
2000
2001                 /*
2002                  * If we don't have enough space to put in another
2003                  * match result, save our position and tell the
2004                  * user there are more devices to check.
2005                  */
2006                 if (spaceleft < sizeof(struct dev_match_result)) {
2007                         bzero(&cdm->pos, sizeof(cdm->pos));
2008                         cdm->pos.position_type =
2009                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2010                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
2011                                 CAM_DEV_POS_PERIPH;
2012
2013                         cdm->pos.cookie.bus = periph->path->bus;
2014                         cdm->pos.generations[CAM_BUS_GENERATION]=
2015                                 xsoftc.bus_generation;
2016                         cdm->pos.cookie.target = periph->path->target;
2017                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2018                                 periph->path->bus->generation;
2019                         cdm->pos.cookie.device = periph->path->device;
2020                         cdm->pos.generations[CAM_DEV_GENERATION] =
2021                                 periph->path->target->generation;
2022                         cdm->pos.cookie.periph = periph;
2023                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2024                                 periph->path->device->generation;
2025                         cdm->status = CAM_DEV_MATCH_MORE;
2026                         return(0);
2027                 }
2028
2029                 j = cdm->num_matches;
2030                 cdm->num_matches++;
2031                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2032                 cdm->matches[j].result.periph_result.path_id =
2033                         periph->path->bus->path_id;
2034                 cdm->matches[j].result.periph_result.target_id =
2035                         periph->path->target->target_id;
2036                 cdm->matches[j].result.periph_result.target_lun =
2037                         periph->path->device->lun_id;
2038                 cdm->matches[j].result.periph_result.unit_number =
2039                         periph->unit_number;
2040                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2041                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2042                         periph->periph_name, l);
2043         }
2044
2045         return(1);
2046 }
2047
2048 static int
2049 xptedtmatch(struct ccb_dev_match *cdm)
2050 {
2051         struct cam_eb *bus;
2052         int ret;
2053
2054         cdm->num_matches = 0;
2055
2056         /*
2057          * Check the bus list generation.  If it has changed, the user
2058          * needs to reset everything and start over.
2059          */
2060         xpt_lock_buses();
2061         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2062          && (cdm->pos.cookie.bus != NULL)) {
2063                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
2064                     xsoftc.bus_generation) {
2065                         xpt_unlock_buses();
2066                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2067                         return(0);
2068                 }
2069                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
2070                 bus->refcount++;
2071         } else
2072                 bus = NULL;
2073         xpt_unlock_buses();
2074
2075         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
2076
2077         /*
2078          * If we get back 0, that means that we had to stop before fully
2079          * traversing the EDT.  It also means that one of the subroutines
2080          * has set the status field to the proper value.  If we get back 1,
2081          * we've fully traversed the EDT and copied out any matching entries.
2082          */
2083         if (ret == 1)
2084                 cdm->status = CAM_DEV_MATCH_LAST;
2085
2086         return(ret);
2087 }
2088
2089 static int
2090 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2091 {
2092         struct cam_periph *periph;
2093         struct ccb_dev_match *cdm;
2094
2095         cdm = (struct ccb_dev_match *)arg;
2096
2097         xpt_lock_buses();
2098         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2099          && (cdm->pos.cookie.pdrv == pdrv)
2100          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2101          && (cdm->pos.cookie.periph != NULL)) {
2102                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2103                     (*pdrv)->generation) {
2104                         xpt_unlock_buses();
2105                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2106                         return(0);
2107                 }
2108                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
2109                 periph->refcount++;
2110         } else
2111                 periph = NULL;
2112         xpt_unlock_buses();
2113
2114         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
2115 }
2116
2117 static int
2118 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2119 {
2120         struct ccb_dev_match *cdm;
2121         dev_match_ret retval;
2122
2123         cdm = (struct ccb_dev_match *)arg;
2124
2125         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2126
2127         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2128                 cdm->status = CAM_DEV_MATCH_ERROR;
2129                 return(0);
2130         }
2131
2132         /*
2133          * If the copy flag is set, copy this peripheral out.
2134          */
2135         if (retval & DM_RET_COPY) {
2136                 int spaceleft, j;
2137                 size_t l;
2138
2139                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2140                         sizeof(struct dev_match_result));
2141
2142                 /*
2143                  * If we don't have enough space to put in another
2144                  * match result, save our position and tell the
2145                  * user there are more devices to check.
2146                  */
2147                 if (spaceleft < sizeof(struct dev_match_result)) {
2148                         struct periph_driver **pdrv;
2149
2150                         pdrv = NULL;
2151                         bzero(&cdm->pos, sizeof(cdm->pos));
2152                         cdm->pos.position_type =
2153                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2154                                 CAM_DEV_POS_PERIPH;
2155
2156                         /*
2157                          * This may look a bit non-sensical, but it is
2158                          * actually quite logical.  There are very few
2159                          * peripheral drivers, and bloating every peripheral
2160                          * structure with a pointer back to its parent
2161                          * peripheral driver linker set entry would cost
2162                          * more in the long run than doing this quick lookup.
2163                          */
2164                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2165                                 if (strcmp((*pdrv)->driver_name,
2166                                     periph->periph_name) == 0)
2167                                         break;
2168                         }
2169
2170                         if (*pdrv == NULL) {
2171                                 cdm->status = CAM_DEV_MATCH_ERROR;
2172                                 return(0);
2173                         }
2174
2175                         cdm->pos.cookie.pdrv = pdrv;
2176                         /*
2177                          * The periph generation slot does double duty, as
2178                          * does the periph pointer slot.  They are used for
2179                          * both edt and pdrv lookups and positioning.
2180                          */
2181                         cdm->pos.cookie.periph = periph;
2182                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2183                                 (*pdrv)->generation;
2184                         cdm->status = CAM_DEV_MATCH_MORE;
2185                         return(0);
2186                 }
2187
2188                 j = cdm->num_matches;
2189                 cdm->num_matches++;
2190                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2191                 cdm->matches[j].result.periph_result.path_id =
2192                         periph->path->bus->path_id;
2193
2194                 /*
2195                  * The transport layer peripheral doesn't have a target or
2196                  * lun.
2197                  */
2198                 if (periph->path->target)
2199                         cdm->matches[j].result.periph_result.target_id =
2200                                 periph->path->target->target_id;
2201                 else
2202                         cdm->matches[j].result.periph_result.target_id =
2203                                 CAM_TARGET_WILDCARD;
2204
2205                 if (periph->path->device)
2206                         cdm->matches[j].result.periph_result.target_lun =
2207                                 periph->path->device->lun_id;
2208                 else
2209                         cdm->matches[j].result.periph_result.target_lun =
2210                                 CAM_LUN_WILDCARD;
2211
2212                 cdm->matches[j].result.periph_result.unit_number =
2213                         periph->unit_number;
2214                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2215                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2216                         periph->periph_name, l);
2217         }
2218
2219         return(1);
2220 }
2221
2222 static int
2223 xptperiphlistmatch(struct ccb_dev_match *cdm)
2224 {
2225         int ret;
2226
2227         cdm->num_matches = 0;
2228
2229         /*
2230          * At this point in the edt traversal function, we check the bus
2231          * list generation to make sure that no buses have been added or
2232          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2233          * For the peripheral driver list traversal function, however, we
2234          * don't have to worry about new peripheral driver types coming or
2235          * going; they're in a linker set, and therefore can't change
2236          * without a recompile.
2237          */
2238
2239         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2240          && (cdm->pos.cookie.pdrv != NULL))
2241                 ret = xptpdrvtraverse(
2242                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2243                                 xptplistpdrvfunc, cdm);
2244         else
2245                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2246
2247         /*
2248          * If we get back 0, that means that we had to stop before fully
2249          * traversing the peripheral driver tree.  It also means that one of
2250          * the subroutines has set the status field to the proper value.  If
2251          * we get back 1, we've fully traversed the EDT and copied out any
2252          * matching entries.
2253          */
2254         if (ret == 1)
2255                 cdm->status = CAM_DEV_MATCH_LAST;
2256
2257         return(ret);
2258 }
2259
2260 static int
2261 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2262 {
2263         struct cam_eb *bus, *next_bus;
2264         int retval;
2265
2266         retval = 1;
2267         if (start_bus)
2268                 bus = start_bus;
2269         else {
2270                 xpt_lock_buses();
2271                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2272                 if (bus == NULL) {
2273                         xpt_unlock_buses();
2274                         return (retval);
2275                 }
2276                 bus->refcount++;
2277                 xpt_unlock_buses();
2278         }
2279         for (; bus != NULL; bus = next_bus) {
2280                 retval = tr_func(bus, arg);
2281                 if (retval == 0) {
2282                         xpt_release_bus(bus);
2283                         break;
2284                 }
2285                 xpt_lock_buses();
2286                 next_bus = TAILQ_NEXT(bus, links);
2287                 if (next_bus)
2288                         next_bus->refcount++;
2289                 xpt_unlock_buses();
2290                 xpt_release_bus(bus);
2291         }
2292         return(retval);
2293 }
2294
2295 static int
2296 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2297                   xpt_targetfunc_t *tr_func, void *arg)
2298 {
2299         struct cam_et *target, *next_target;
2300         int retval;
2301
2302         retval = 1;
2303         if (start_target)
2304                 target = start_target;
2305         else {
2306                 mtx_lock(&bus->eb_mtx);
2307                 target = TAILQ_FIRST(&bus->et_entries);
2308                 if (target == NULL) {
2309                         mtx_unlock(&bus->eb_mtx);
2310                         return (retval);
2311                 }
2312                 target->refcount++;
2313                 mtx_unlock(&bus->eb_mtx);
2314         }
2315         for (; target != NULL; target = next_target) {
2316                 retval = tr_func(target, arg);
2317                 if (retval == 0) {
2318                         xpt_release_target(target);
2319                         break;
2320                 }
2321                 mtx_lock(&bus->eb_mtx);
2322                 next_target = TAILQ_NEXT(target, links);
2323                 if (next_target)
2324                         next_target->refcount++;
2325                 mtx_unlock(&bus->eb_mtx);
2326                 xpt_release_target(target);
2327         }
2328         return(retval);
2329 }
2330
2331 static int
2332 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2333                   xpt_devicefunc_t *tr_func, void *arg)
2334 {
2335         struct cam_eb *bus;
2336         struct cam_ed *device, *next_device;
2337         int retval;
2338
2339         retval = 1;
2340         bus = target->bus;
2341         if (start_device)
2342                 device = start_device;
2343         else {
2344                 mtx_lock(&bus->eb_mtx);
2345                 device = TAILQ_FIRST(&target->ed_entries);
2346                 if (device == NULL) {
2347                         mtx_unlock(&bus->eb_mtx);
2348                         return (retval);
2349                 }
2350                 device->refcount++;
2351                 mtx_unlock(&bus->eb_mtx);
2352         }
2353         for (; device != NULL; device = next_device) {
2354                 mtx_lock(&device->device_mtx);
2355                 retval = tr_func(device, arg);
2356                 mtx_unlock(&device->device_mtx);
2357                 if (retval == 0) {
2358                         xpt_release_device(device);
2359                         break;
2360                 }
2361                 mtx_lock(&bus->eb_mtx);
2362                 next_device = TAILQ_NEXT(device, links);
2363                 if (next_device)
2364                         next_device->refcount++;
2365                 mtx_unlock(&bus->eb_mtx);
2366                 xpt_release_device(device);
2367         }
2368         return(retval);
2369 }
2370
2371 static int
2372 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2373                   xpt_periphfunc_t *tr_func, void *arg)
2374 {
2375         struct cam_eb *bus;
2376         struct cam_periph *periph, *next_periph;
2377         int retval;
2378
2379         retval = 1;
2380
2381         bus = device->target->bus;
2382         if (start_periph)
2383                 periph = start_periph;
2384         else {
2385                 xpt_lock_buses();
2386                 mtx_lock(&bus->eb_mtx);
2387                 periph = SLIST_FIRST(&device->periphs);
2388                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2389                         periph = SLIST_NEXT(periph, periph_links);
2390                 if (periph == NULL) {
2391                         mtx_unlock(&bus->eb_mtx);
2392                         xpt_unlock_buses();
2393                         return (retval);
2394                 }
2395                 periph->refcount++;
2396                 mtx_unlock(&bus->eb_mtx);
2397                 xpt_unlock_buses();
2398         }
2399         for (; periph != NULL; periph = next_periph) {
2400                 retval = tr_func(periph, arg);
2401                 if (retval == 0) {
2402                         cam_periph_release_locked(periph);
2403                         break;
2404                 }
2405                 xpt_lock_buses();
2406                 mtx_lock(&bus->eb_mtx);
2407                 next_periph = SLIST_NEXT(periph, periph_links);
2408                 while (next_periph != NULL &&
2409                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2410                         next_periph = SLIST_NEXT(next_periph, periph_links);
2411                 if (next_periph)
2412                         next_periph->refcount++;
2413                 mtx_unlock(&bus->eb_mtx);
2414                 xpt_unlock_buses();
2415                 cam_periph_release_locked(periph);
2416         }
2417         return(retval);
2418 }
2419
2420 static int
2421 xptpdrvtraverse(struct periph_driver **start_pdrv,
2422                 xpt_pdrvfunc_t *tr_func, void *arg)
2423 {
2424         struct periph_driver **pdrv;
2425         int retval;
2426
2427         retval = 1;
2428
2429         /*
2430          * We don't traverse the peripheral driver list like we do the
2431          * other lists, because it is a linker set, and therefore cannot be
2432          * changed during runtime.  If the peripheral driver list is ever
2433          * re-done to be something other than a linker set (i.e. it can
2434          * change while the system is running), the list traversal should
2435          * be modified to work like the other traversal functions.
2436          */
2437         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2438              *pdrv != NULL; pdrv++) {
2439                 retval = tr_func(pdrv, arg);
2440
2441                 if (retval == 0)
2442                         return(retval);
2443         }
2444
2445         return(retval);
2446 }
2447
2448 static int
2449 xptpdperiphtraverse(struct periph_driver **pdrv,
2450                     struct cam_periph *start_periph,
2451                     xpt_periphfunc_t *tr_func, void *arg)
2452 {
2453         struct cam_periph *periph, *next_periph;
2454         int retval;
2455
2456         retval = 1;
2457
2458         if (start_periph)
2459                 periph = start_periph;
2460         else {
2461                 xpt_lock_buses();
2462                 periph = TAILQ_FIRST(&(*pdrv)->units);
2463                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2464                         periph = TAILQ_NEXT(periph, unit_links);
2465                 if (periph == NULL) {
2466                         xpt_unlock_buses();
2467                         return (retval);
2468                 }
2469                 periph->refcount++;
2470                 xpt_unlock_buses();
2471         }
2472         for (; periph != NULL; periph = next_periph) {
2473                 cam_periph_lock(periph);
2474                 retval = tr_func(periph, arg);
2475                 cam_periph_unlock(periph);
2476                 if (retval == 0) {
2477                         cam_periph_release(periph);
2478                         break;
2479                 }
2480                 xpt_lock_buses();
2481                 next_periph = TAILQ_NEXT(periph, unit_links);
2482                 while (next_periph != NULL &&
2483                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2484                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2485                 if (next_periph)
2486                         next_periph->refcount++;
2487                 xpt_unlock_buses();
2488                 cam_periph_release(periph);
2489         }
2490         return(retval);
2491 }
2492
2493 static int
2494 xptdefbusfunc(struct cam_eb *bus, void *arg)
2495 {
2496         struct xpt_traverse_config *tr_config;
2497
2498         tr_config = (struct xpt_traverse_config *)arg;
2499
2500         if (tr_config->depth == XPT_DEPTH_BUS) {
2501                 xpt_busfunc_t *tr_func;
2502
2503                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2504
2505                 return(tr_func(bus, tr_config->tr_arg));
2506         } else
2507                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2508 }
2509
2510 static int
2511 xptdeftargetfunc(struct cam_et *target, void *arg)
2512 {
2513         struct xpt_traverse_config *tr_config;
2514
2515         tr_config = (struct xpt_traverse_config *)arg;
2516
2517         if (tr_config->depth == XPT_DEPTH_TARGET) {
2518                 xpt_targetfunc_t *tr_func;
2519
2520                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2521
2522                 return(tr_func(target, tr_config->tr_arg));
2523         } else
2524                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2525 }
2526
2527 static int
2528 xptdefdevicefunc(struct cam_ed *device, void *arg)
2529 {
2530         struct xpt_traverse_config *tr_config;
2531
2532         tr_config = (struct xpt_traverse_config *)arg;
2533
2534         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2535                 xpt_devicefunc_t *tr_func;
2536
2537                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2538
2539                 return(tr_func(device, tr_config->tr_arg));
2540         } else
2541                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2542 }
2543
2544 static int
2545 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2546 {
2547         struct xpt_traverse_config *tr_config;
2548         xpt_periphfunc_t *tr_func;
2549
2550         tr_config = (struct xpt_traverse_config *)arg;
2551
2552         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2553
2554         /*
2555          * Unlike the other default functions, we don't check for depth
2556          * here.  The peripheral driver level is the last level in the EDT,
2557          * so if we're here, we should execute the function in question.
2558          */
2559         return(tr_func(periph, tr_config->tr_arg));
2560 }
2561
2562 /*
2563  * Execute the given function for every bus in the EDT.
2564  */
2565 static int
2566 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2567 {
2568         struct xpt_traverse_config tr_config;
2569
2570         tr_config.depth = XPT_DEPTH_BUS;
2571         tr_config.tr_func = tr_func;
2572         tr_config.tr_arg = arg;
2573
2574         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2575 }
2576
2577 /*
2578  * Execute the given function for every device in the EDT.
2579  */
2580 static int
2581 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2582 {
2583         struct xpt_traverse_config tr_config;
2584
2585         tr_config.depth = XPT_DEPTH_DEVICE;
2586         tr_config.tr_func = tr_func;
2587         tr_config.tr_arg = arg;
2588
2589         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2590 }
2591
2592 static int
2593 xptsetasyncfunc(struct cam_ed *device, void *arg)
2594 {
2595         struct cam_path path;
2596         struct ccb_getdev cgd;
2597         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2598
2599         /*
2600          * Don't report unconfigured devices (Wildcard devs,
2601          * devices only for target mode, device instances
2602          * that have been invalidated but are waiting for
2603          * their last reference count to be released).
2604          */
2605         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2606                 return (1);
2607
2608         xpt_compile_path(&path,
2609                          NULL,
2610                          device->target->bus->path_id,
2611                          device->target->target_id,
2612                          device->lun_id);
2613         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2614         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2615         xpt_action((union ccb *)&cgd);
2616         csa->callback(csa->callback_arg,
2617                             AC_FOUND_DEVICE,
2618                             &path, &cgd);
2619         xpt_release_path(&path);
2620
2621         return(1);
2622 }
2623
2624 static int
2625 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2626 {
2627         struct cam_path path;
2628         struct ccb_pathinq cpi;
2629         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2630
2631         xpt_compile_path(&path, /*periph*/NULL,
2632                          bus->path_id,
2633                          CAM_TARGET_WILDCARD,
2634                          CAM_LUN_WILDCARD);
2635         xpt_path_lock(&path);
2636         xpt_path_inq(&cpi, &path);
2637         csa->callback(csa->callback_arg,
2638                             AC_PATH_REGISTERED,
2639                             &path, &cpi);
2640         xpt_path_unlock(&path);
2641         xpt_release_path(&path);
2642
2643         return(1);
2644 }
2645
2646 void
2647 xpt_action(union ccb *start_ccb)
2648 {
2649
2650         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2651             ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2652                 xpt_action_name(start_ccb->ccb_h.func_code)));
2653
2654         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2655         (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb);
2656 }
2657
2658 void
2659 xpt_action_default(union ccb *start_ccb)
2660 {
2661         struct cam_path *path;
2662         struct cam_sim *sim;
2663         struct mtx *mtx;
2664
2665         path = start_ccb->ccb_h.path;
2666         CAM_DEBUG(path, CAM_DEBUG_TRACE,
2667             ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2668                 xpt_action_name(start_ccb->ccb_h.func_code)));
2669
2670         switch (start_ccb->ccb_h.func_code) {
2671         case XPT_SCSI_IO:
2672         {
2673                 struct cam_ed *device;
2674
2675                 /*
2676                  * For the sake of compatibility with SCSI-1
2677                  * devices that may not understand the identify
2678                  * message, we include lun information in the
2679                  * second byte of all commands.  SCSI-1 specifies
2680                  * that luns are a 3 bit value and reserves only 3
2681                  * bits for lun information in the CDB.  Later
2682                  * revisions of the SCSI spec allow for more than 8
2683                  * luns, but have deprecated lun information in the
2684                  * CDB.  So, if the lun won't fit, we must omit.
2685                  *
2686                  * Also be aware that during initial probing for devices,
2687                  * the inquiry information is unknown but initialized to 0.
2688                  * This means that this code will be exercised while probing
2689                  * devices with an ANSI revision greater than 2.
2690                  */
2691                 device = path->device;
2692                 if (device->protocol_version <= SCSI_REV_2
2693                  && start_ccb->ccb_h.target_lun < 8
2694                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2695
2696                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2697                             start_ccb->ccb_h.target_lun << 5;
2698                 }
2699                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2700         }
2701         /* FALLTHROUGH */
2702         case XPT_TARGET_IO:
2703         case XPT_CONT_TARGET_IO:
2704                 start_ccb->csio.sense_resid = 0;
2705                 start_ccb->csio.resid = 0;
2706                 /* FALLTHROUGH */
2707         case XPT_ATA_IO:
2708                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2709                         start_ccb->ataio.resid = 0;
2710                 /* FALLTHROUGH */
2711         case XPT_NVME_IO:
2712                 /* FALLTHROUGH */
2713         case XPT_NVME_ADMIN:
2714                 /* FALLTHROUGH */
2715         case XPT_MMC_IO:
2716                 /* XXX just like nmve_io? */
2717         case XPT_RESET_DEV:
2718         case XPT_ENG_EXEC:
2719         case XPT_SMP_IO:
2720         {
2721                 struct cam_devq *devq;
2722
2723                 devq = path->bus->sim->devq;
2724                 mtx_lock(&devq->send_mtx);
2725                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2726                 if (xpt_schedule_devq(devq, path->device) != 0)
2727                         xpt_run_devq(devq);
2728                 mtx_unlock(&devq->send_mtx);
2729                 break;
2730         }
2731         case XPT_CALC_GEOMETRY:
2732                 /* Filter out garbage */
2733                 if (start_ccb->ccg.block_size == 0
2734                  || start_ccb->ccg.volume_size == 0) {
2735                         start_ccb->ccg.cylinders = 0;
2736                         start_ccb->ccg.heads = 0;
2737                         start_ccb->ccg.secs_per_track = 0;
2738                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2739                         break;
2740                 }
2741 #if defined(__sparc64__)
2742                 /*
2743                  * For sparc64, we may need adjust the geometry of large
2744                  * disks in order to fit the limitations of the 16-bit
2745                  * fields of the VTOC8 disk label.
2746                  */
2747                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2748                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2749                         break;
2750                 }
2751 #endif
2752                 goto call_sim;
2753         case XPT_ABORT:
2754         {
2755                 union ccb* abort_ccb;
2756
2757                 abort_ccb = start_ccb->cab.abort_ccb;
2758                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2759                         struct cam_ed *device;
2760                         struct cam_devq *devq;
2761
2762                         device = abort_ccb->ccb_h.path->device;
2763                         devq = device->sim->devq;
2764
2765                         mtx_lock(&devq->send_mtx);
2766                         if (abort_ccb->ccb_h.pinfo.index > 0) {
2767                                 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb);
2768                                 abort_ccb->ccb_h.status =
2769                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2770                                 xpt_freeze_devq_device(device, 1);
2771                                 mtx_unlock(&devq->send_mtx);
2772                                 xpt_done(abort_ccb);
2773                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2774                                 break;
2775                         }
2776                         mtx_unlock(&devq->send_mtx);
2777
2778                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2779                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2780                                 /*
2781                                  * We've caught this ccb en route to
2782                                  * the SIM.  Flag it for abort and the
2783                                  * SIM will do so just before starting
2784                                  * real work on the CCB.
2785                                  */
2786                                 abort_ccb->ccb_h.status =
2787                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2788                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2789                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2790                                 break;
2791                         }
2792                 }
2793                 if (XPT_FC_IS_QUEUED(abort_ccb)
2794                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2795                         /*
2796                          * It's already completed but waiting
2797                          * for our SWI to get to it.
2798                          */
2799                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2800                         break;
2801                 }
2802                 /*
2803                  * If we weren't able to take care of the abort request
2804                  * in the XPT, pass the request down to the SIM for processing.
2805                  */
2806         }
2807         /* FALLTHROUGH */
2808         case XPT_ACCEPT_TARGET_IO:
2809         case XPT_EN_LUN:
2810         case XPT_IMMED_NOTIFY:
2811         case XPT_NOTIFY_ACK:
2812         case XPT_RESET_BUS:
2813         case XPT_IMMEDIATE_NOTIFY:
2814         case XPT_NOTIFY_ACKNOWLEDGE:
2815         case XPT_GET_SIM_KNOB_OLD:
2816         case XPT_GET_SIM_KNOB:
2817         case XPT_SET_SIM_KNOB:
2818         case XPT_GET_TRAN_SETTINGS:
2819         case XPT_SET_TRAN_SETTINGS:
2820         case XPT_PATH_INQ:
2821 call_sim:
2822                 sim = path->bus->sim;
2823                 mtx = sim->mtx;
2824                 if (mtx && !mtx_owned(mtx))
2825                         mtx_lock(mtx);
2826                 else
2827                         mtx = NULL;
2828
2829                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2830                     ("Calling sim->sim_action(): func=%#x\n", start_ccb->ccb_h.func_code));
2831                 (*(sim->sim_action))(sim, start_ccb);
2832                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2833                     ("sim->sim_action returned: status=%#x\n", start_ccb->ccb_h.status));
2834                 if (mtx)
2835                         mtx_unlock(mtx);
2836                 break;
2837         case XPT_PATH_STATS:
2838                 start_ccb->cpis.last_reset = path->bus->last_reset;
2839                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2840                 break;
2841         case XPT_GDEV_TYPE:
2842         {
2843                 struct cam_ed *dev;
2844
2845                 dev = path->device;
2846                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2847                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2848                 } else {
2849                         struct ccb_getdev *cgd;
2850
2851                         cgd = &start_ccb->cgd;
2852                         cgd->protocol = dev->protocol;
2853                         cgd->inq_data = dev->inq_data;
2854                         cgd->ident_data = dev->ident_data;
2855                         cgd->inq_flags = dev->inq_flags;
2856                         cgd->ccb_h.status = CAM_REQ_CMP;
2857                         cgd->serial_num_len = dev->serial_num_len;
2858                         if ((dev->serial_num_len > 0)
2859                          && (dev->serial_num != NULL))
2860                                 bcopy(dev->serial_num, cgd->serial_num,
2861                                       dev->serial_num_len);
2862                 }
2863                 break;
2864         }
2865         case XPT_GDEV_STATS:
2866         {
2867                 struct ccb_getdevstats *cgds = &start_ccb->cgds;
2868                 struct cam_ed *dev = path->device;
2869                 struct cam_eb *bus = path->bus;
2870                 struct cam_et *tar = path->target;
2871                 struct cam_devq *devq = bus->sim->devq;
2872
2873                 mtx_lock(&devq->send_mtx);
2874                 cgds->dev_openings = dev->ccbq.dev_openings;
2875                 cgds->dev_active = dev->ccbq.dev_active;
2876                 cgds->allocated = dev->ccbq.allocated;
2877                 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2878                 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued;
2879                 cgds->last_reset = tar->last_reset;
2880                 cgds->maxtags = dev->maxtags;
2881                 cgds->mintags = dev->mintags;
2882                 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2883                         cgds->last_reset = bus->last_reset;
2884                 mtx_unlock(&devq->send_mtx);
2885                 cgds->ccb_h.status = CAM_REQ_CMP;
2886                 break;
2887         }
2888         case XPT_GDEVLIST:
2889         {
2890                 struct cam_periph       *nperiph;
2891                 struct periph_list      *periph_head;
2892                 struct ccb_getdevlist   *cgdl;
2893                 u_int                   i;
2894                 struct cam_ed           *device;
2895                 int                     found;
2896
2897
2898                 found = 0;
2899
2900                 /*
2901                  * Don't want anyone mucking with our data.
2902                  */
2903                 device = path->device;
2904                 periph_head = &device->periphs;
2905                 cgdl = &start_ccb->cgdl;
2906
2907                 /*
2908                  * Check and see if the list has changed since the user
2909                  * last requested a list member.  If so, tell them that the
2910                  * list has changed, and therefore they need to start over
2911                  * from the beginning.
2912                  */
2913                 if ((cgdl->index != 0) &&
2914                     (cgdl->generation != device->generation)) {
2915                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2916                         break;
2917                 }
2918
2919                 /*
2920                  * Traverse the list of peripherals and attempt to find
2921                  * the requested peripheral.
2922                  */
2923                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2924                      (nperiph != NULL) && (i <= cgdl->index);
2925                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2926                         if (i == cgdl->index) {
2927                                 strlcpy(cgdl->periph_name,
2928                                         nperiph->periph_name,
2929                                         sizeof(cgdl->periph_name));
2930                                 cgdl->unit_number = nperiph->unit_number;
2931                                 found = 1;
2932                         }
2933                 }
2934                 if (found == 0) {
2935                         cgdl->status = CAM_GDEVLIST_ERROR;
2936                         break;
2937                 }
2938
2939                 if (nperiph == NULL)
2940                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2941                 else
2942                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2943
2944                 cgdl->index++;
2945                 cgdl->generation = device->generation;
2946
2947                 cgdl->ccb_h.status = CAM_REQ_CMP;
2948                 break;
2949         }
2950         case XPT_DEV_MATCH:
2951         {
2952                 dev_pos_type position_type;
2953                 struct ccb_dev_match *cdm;
2954
2955                 cdm = &start_ccb->cdm;
2956
2957                 /*
2958                  * There are two ways of getting at information in the EDT.
2959                  * The first way is via the primary EDT tree.  It starts
2960                  * with a list of buses, then a list of targets on a bus,
2961                  * then devices/luns on a target, and then peripherals on a
2962                  * device/lun.  The "other" way is by the peripheral driver
2963                  * lists.  The peripheral driver lists are organized by
2964                  * peripheral driver.  (obviously)  So it makes sense to
2965                  * use the peripheral driver list if the user is looking
2966                  * for something like "da1", or all "da" devices.  If the
2967                  * user is looking for something on a particular bus/target
2968                  * or lun, it's generally better to go through the EDT tree.
2969                  */
2970
2971                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2972                         position_type = cdm->pos.position_type;
2973                 else {
2974                         u_int i;
2975
2976                         position_type = CAM_DEV_POS_NONE;
2977
2978                         for (i = 0; i < cdm->num_patterns; i++) {
2979                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2980                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2981                                         position_type = CAM_DEV_POS_EDT;
2982                                         break;
2983                                 }
2984                         }
2985
2986                         if (cdm->num_patterns == 0)
2987                                 position_type = CAM_DEV_POS_EDT;
2988                         else if (position_type == CAM_DEV_POS_NONE)
2989                                 position_type = CAM_DEV_POS_PDRV;
2990                 }
2991
2992                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2993                 case CAM_DEV_POS_EDT:
2994                         xptedtmatch(cdm);
2995                         break;
2996                 case CAM_DEV_POS_PDRV:
2997                         xptperiphlistmatch(cdm);
2998                         break;
2999                 default:
3000                         cdm->status = CAM_DEV_MATCH_ERROR;
3001                         break;
3002                 }
3003
3004                 if (cdm->status == CAM_DEV_MATCH_ERROR)
3005                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
3006                 else
3007                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3008
3009                 break;
3010         }
3011         case XPT_SASYNC_CB:
3012         {
3013                 struct ccb_setasync *csa;
3014                 struct async_node *cur_entry;
3015                 struct async_list *async_head;
3016                 u_int32_t added;
3017
3018                 csa = &start_ccb->csa;
3019                 added = csa->event_enable;
3020                 async_head = &path->device->asyncs;
3021
3022                 /*
3023                  * If there is already an entry for us, simply
3024                  * update it.
3025                  */
3026                 cur_entry = SLIST_FIRST(async_head);
3027                 while (cur_entry != NULL) {
3028                         if ((cur_entry->callback_arg == csa->callback_arg)
3029                          && (cur_entry->callback == csa->callback))
3030                                 break;
3031                         cur_entry = SLIST_NEXT(cur_entry, links);
3032                 }
3033
3034                 if (cur_entry != NULL) {
3035                         /*
3036                          * If the request has no flags set,
3037                          * remove the entry.
3038                          */
3039                         added &= ~cur_entry->event_enable;
3040                         if (csa->event_enable == 0) {
3041                                 SLIST_REMOVE(async_head, cur_entry,
3042                                              async_node, links);
3043                                 xpt_release_device(path->device);
3044                                 free(cur_entry, M_CAMXPT);
3045                         } else {
3046                                 cur_entry->event_enable = csa->event_enable;
3047                         }
3048                         csa->event_enable = added;
3049                 } else {
3050                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3051                                            M_NOWAIT);
3052                         if (cur_entry == NULL) {
3053                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3054                                 break;
3055                         }
3056                         cur_entry->event_enable = csa->event_enable;
3057                         cur_entry->event_lock = (path->bus->sim->mtx &&
3058                             mtx_owned(path->bus->sim->mtx)) ? 1 : 0;
3059                         cur_entry->callback_arg = csa->callback_arg;
3060                         cur_entry->callback = csa->callback;
3061                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3062                         xpt_acquire_device(path->device);
3063                 }
3064                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3065                 break;
3066         }
3067         case XPT_REL_SIMQ:
3068         {
3069                 struct ccb_relsim *crs;
3070                 struct cam_ed *dev;
3071
3072                 crs = &start_ccb->crs;
3073                 dev = path->device;
3074                 if (dev == NULL) {
3075
3076                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3077                         break;
3078                 }
3079
3080                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3081
3082                         /* Don't ever go below one opening */
3083                         if (crs->openings > 0) {
3084                                 xpt_dev_ccbq_resize(path, crs->openings);
3085                                 if (bootverbose) {
3086                                         xpt_print(path,
3087                                             "number of openings is now %d\n",
3088                                             crs->openings);
3089                                 }
3090                         }
3091                 }
3092
3093                 mtx_lock(&dev->sim->devq->send_mtx);
3094                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3095
3096                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3097
3098                                 /*
3099                                  * Just extend the old timeout and decrement
3100                                  * the freeze count so that a single timeout
3101                                  * is sufficient for releasing the queue.
3102                                  */
3103                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3104                                 callout_stop(&dev->callout);
3105                         } else {
3106
3107                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3108                         }
3109
3110                         callout_reset_sbt(&dev->callout,
3111                             SBT_1MS * crs->release_timeout, 0,
3112                             xpt_release_devq_timeout, dev, 0);
3113
3114                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3115
3116                 }
3117
3118                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3119
3120                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3121                                 /*
3122                                  * Decrement the freeze count so that a single
3123                                  * completion is still sufficient to unfreeze
3124                                  * the queue.
3125                                  */
3126                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3127                         } else {
3128
3129                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3130                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3131                         }
3132                 }
3133
3134                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3135
3136                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3137                          || (dev->ccbq.dev_active == 0)) {
3138
3139                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3140                         } else {
3141
3142                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3143                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3144                         }
3145                 }
3146                 mtx_unlock(&dev->sim->devq->send_mtx);
3147
3148                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3149                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3150                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3151                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3152                 break;
3153         }
3154         case XPT_DEBUG: {
3155                 struct cam_path *oldpath;
3156
3157                 /* Check that all request bits are supported. */
3158                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3159                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3160                         break;
3161                 }
3162
3163                 cam_dflags = CAM_DEBUG_NONE;
3164                 if (cam_dpath != NULL) {
3165                         oldpath = cam_dpath;
3166                         cam_dpath = NULL;
3167                         xpt_free_path(oldpath);
3168                 }
3169                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3170                         if (xpt_create_path(&cam_dpath, NULL,
3171                                             start_ccb->ccb_h.path_id,
3172                                             start_ccb->ccb_h.target_id,
3173                                             start_ccb->ccb_h.target_lun) !=
3174                                             CAM_REQ_CMP) {
3175                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3176                         } else {
3177                                 cam_dflags = start_ccb->cdbg.flags;
3178                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3179                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3180                                     cam_dflags);
3181                         }
3182                 } else
3183                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3184                 break;
3185         }
3186         case XPT_NOOP:
3187                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3188                         xpt_freeze_devq(path, 1);
3189                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3190                 break;
3191         case XPT_REPROBE_LUN:
3192                 xpt_async(AC_INQ_CHANGED, path, NULL);
3193                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3194                 xpt_done(start_ccb);
3195                 break;
3196         default:
3197         case XPT_SDEV_TYPE:
3198         case XPT_TERM_IO:
3199         case XPT_ENG_INQ:
3200                 /* XXX Implement */
3201                 xpt_print(start_ccb->ccb_h.path,
3202                     "%s: CCB type %#x %s not supported\n", __func__,
3203                     start_ccb->ccb_h.func_code,
3204                     xpt_action_name(start_ccb->ccb_h.func_code));
3205                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3206                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3207                         xpt_done(start_ccb);
3208                 }
3209                 break;
3210         }
3211         CAM_DEBUG(path, CAM_DEBUG_TRACE,
3212             ("xpt_action_default: func= %#x %s status %#x\n",
3213                 start_ccb->ccb_h.func_code,
3214                 xpt_action_name(start_ccb->ccb_h.func_code),
3215                 start_ccb->ccb_h.status));
3216 }
3217
3218 /*
3219  * Call the sim poll routine to allow the sim to complete
3220  * any inflight requests, then call camisr_runqueue to
3221  * complete any CCB that the polling completed.
3222  */
3223 void
3224 xpt_sim_poll(struct cam_sim *sim)
3225 {
3226         struct mtx *mtx;
3227
3228         mtx = sim->mtx;
3229         if (mtx)
3230                 mtx_lock(mtx);
3231         (*(sim->sim_poll))(sim);
3232         if (mtx)
3233                 mtx_unlock(mtx);
3234         camisr_runqueue();
3235 }
3236
3237 uint32_t
3238 xpt_poll_setup(union ccb *start_ccb)
3239 {
3240         u_int32_t timeout;
3241         struct    cam_sim *sim;
3242         struct    cam_devq *devq;
3243         struct    cam_ed *dev;
3244
3245         timeout = start_ccb->ccb_h.timeout * 10;
3246         sim = start_ccb->ccb_h.path->bus->sim;
3247         devq = sim->devq;
3248         dev = start_ccb->ccb_h.path->device;
3249
3250         /*
3251          * Steal an opening so that no other queued requests
3252          * can get it before us while we simulate interrupts.
3253          */
3254         mtx_lock(&devq->send_mtx);
3255         dev->ccbq.dev_openings--;
3256         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3257             (--timeout > 0)) {
3258                 mtx_unlock(&devq->send_mtx);
3259                 DELAY(100);
3260                 xpt_sim_poll(sim);
3261                 mtx_lock(&devq->send_mtx);
3262         }
3263         dev->ccbq.dev_openings++;
3264         mtx_unlock(&devq->send_mtx);
3265
3266         return (timeout);
3267 }
3268
3269 void
3270 xpt_pollwait(union ccb *start_ccb, uint32_t timeout)
3271 {
3272
3273         while (--timeout > 0) {
3274                 xpt_sim_poll(start_ccb->ccb_h.path->bus->sim);
3275                 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3276                     != CAM_REQ_INPROG)
3277                         break;
3278                 DELAY(100);
3279         }
3280
3281         if (timeout == 0) {
3282                 /*
3283                  * XXX Is it worth adding a sim_timeout entry
3284                  * point so we can attempt recovery?  If
3285                  * this is only used for dumps, I don't think
3286                  * it is.
3287                  */
3288                 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3289         }
3290 }
3291
3292 void
3293 xpt_polled_action(union ccb *start_ccb)
3294 {
3295         uint32_t        timeout;
3296         struct cam_ed   *dev;
3297
3298         timeout = start_ccb->ccb_h.timeout * 10;
3299         dev = start_ccb->ccb_h.path->device;
3300
3301         mtx_unlock(&dev->device_mtx);
3302
3303         timeout = xpt_poll_setup(start_ccb);
3304         if (timeout > 0) {
3305                 xpt_action(start_ccb);
3306                 xpt_pollwait(start_ccb, timeout);
3307         } else {
3308                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3309         }
3310
3311         mtx_lock(&dev->device_mtx);
3312 }
3313
3314 /*
3315  * Schedule a peripheral driver to receive a ccb when its
3316  * target device has space for more transactions.
3317  */
3318 void
3319 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3320 {
3321
3322         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3323         cam_periph_assert(periph, MA_OWNED);
3324         if (new_priority < periph->scheduled_priority) {
3325                 periph->scheduled_priority = new_priority;
3326                 xpt_run_allocq(periph, 0);
3327         }
3328 }
3329
3330
3331 /*
3332  * Schedule a device to run on a given queue.
3333  * If the device was inserted as a new entry on the queue,
3334  * return 1 meaning the device queue should be run. If we
3335  * were already queued, implying someone else has already
3336  * started the queue, return 0 so the caller doesn't attempt
3337  * to run the queue.
3338  */
3339 static int
3340 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3341                  u_int32_t new_priority)
3342 {
3343         int retval;
3344         u_int32_t old_priority;
3345
3346         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3347
3348
3349         old_priority = pinfo->priority;
3350
3351         /*
3352          * Are we already queued?
3353          */
3354         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3355                 /* Simply reorder based on new priority */
3356                 if (new_priority < old_priority) {
3357                         camq_change_priority(queue, pinfo->index,
3358                                              new_priority);
3359                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3360                                         ("changed priority to %d\n",
3361                                          new_priority));
3362                         retval = 1;
3363                 } else
3364                         retval = 0;
3365         } else {
3366                 /* New entry on the queue */
3367                 if (new_priority < old_priority)
3368                         pinfo->priority = new_priority;
3369
3370                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3371                                 ("Inserting onto queue\n"));
3372                 pinfo->generation = ++queue->generation;
3373                 camq_insert(queue, pinfo);
3374                 retval = 1;
3375         }
3376         return (retval);
3377 }
3378
3379 static void
3380 xpt_run_allocq_task(void *context, int pending)
3381 {
3382         struct cam_periph *periph = context;
3383
3384         cam_periph_lock(periph);
3385         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3386         xpt_run_allocq(periph, 1);
3387         cam_periph_unlock(periph);
3388         cam_periph_release(periph);
3389 }
3390
3391 static void
3392 xpt_run_allocq(struct cam_periph *periph, int sleep)
3393 {
3394         struct cam_ed   *device;
3395         union ccb       *ccb;
3396         uint32_t         prio;
3397
3398         cam_periph_assert(periph, MA_OWNED);
3399         if (periph->periph_allocating)
3400                 return;
3401         cam_periph_doacquire(periph);
3402         periph->periph_allocating = 1;
3403         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3404         device = periph->path->device;
3405         ccb = NULL;
3406 restart:
3407         while ((prio = min(periph->scheduled_priority,
3408             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3409             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3410              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3411
3412                 if (ccb == NULL &&
3413                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3414                         if (sleep) {
3415                                 ccb = xpt_get_ccb(periph);
3416                                 goto restart;
3417                         }
3418                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3419                                 break;
3420                         cam_periph_doacquire(periph);
3421                         periph->flags |= CAM_PERIPH_RUN_TASK;
3422                         taskqueue_enqueue(xsoftc.xpt_taskq,
3423                             &periph->periph_run_task);
3424                         break;
3425                 }
3426                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3427                 if (prio == periph->immediate_priority) {
3428                         periph->immediate_priority = CAM_PRIORITY_NONE;
3429                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3430                                         ("waking cam_periph_getccb()\n"));
3431                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3432                                           periph_links.sle);
3433                         wakeup(&periph->ccb_list);
3434                 } else {
3435                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3436                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3437                                         ("calling periph_start()\n"));
3438                         periph->periph_start(periph, ccb);
3439                 }
3440                 ccb = NULL;
3441         }
3442         if (ccb != NULL)
3443                 xpt_release_ccb(ccb);
3444         periph->periph_allocating = 0;
3445         cam_periph_release_locked(periph);
3446 }
3447
3448 static void
3449 xpt_run_devq(struct cam_devq *devq)
3450 {
3451         struct mtx *mtx;
3452
3453         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3454
3455         devq->send_queue.qfrozen_cnt++;
3456         while ((devq->send_queue.entries > 0)
3457             && (devq->send_openings > 0)
3458             && (devq->send_queue.qfrozen_cnt <= 1)) {
3459                 struct  cam_ed *device;
3460                 union ccb *work_ccb;
3461                 struct  cam_sim *sim;
3462                 struct xpt_proto *proto;
3463
3464                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3465                                                            CAMQ_HEAD);
3466                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3467                                 ("running device %p\n", device));
3468
3469                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3470                 if (work_ccb == NULL) {
3471                         printf("device on run queue with no ccbs???\n");
3472                         continue;
3473                 }
3474
3475                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3476
3477                         mtx_lock(&xsoftc.xpt_highpower_lock);
3478                         if (xsoftc.num_highpower <= 0) {
3479                                 /*
3480                                  * We got a high power command, but we
3481                                  * don't have any available slots.  Freeze
3482                                  * the device queue until we have a slot
3483                                  * available.
3484                                  */
3485                                 xpt_freeze_devq_device(device, 1);
3486                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3487                                                    highpowerq_entry);
3488
3489                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3490                                 continue;
3491                         } else {
3492                                 /*
3493                                  * Consume a high power slot while
3494                                  * this ccb runs.
3495                                  */
3496                                 xsoftc.num_highpower--;
3497                         }
3498                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3499                 }
3500                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3501                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3502                 devq->send_openings--;
3503                 devq->send_active++;
3504                 xpt_schedule_devq(devq, device);
3505                 mtx_unlock(&devq->send_mtx);
3506
3507                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3508                         /*
3509                          * The client wants to freeze the queue
3510                          * after this CCB is sent.
3511                          */
3512                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3513                 }
3514
3515                 /* In Target mode, the peripheral driver knows best... */
3516                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3517                         if ((device->inq_flags & SID_CmdQue) != 0
3518                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3519                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3520                         else
3521                                 /*
3522                                  * Clear this in case of a retried CCB that
3523                                  * failed due to a rejected tag.
3524                                  */
3525                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3526                 }
3527
3528                 KASSERT(device == work_ccb->ccb_h.path->device,
3529                     ("device (%p) / path->device (%p) mismatch",
3530                         device, work_ccb->ccb_h.path->device));
3531                 proto = xpt_proto_find(device->protocol);
3532                 if (proto && proto->ops->debug_out)
3533                         proto->ops->debug_out(work_ccb);
3534
3535                 /*
3536                  * Device queues can be shared among multiple SIM instances
3537                  * that reside on different buses.  Use the SIM from the
3538                  * queued device, rather than the one from the calling bus.
3539                  */
3540                 sim = device->sim;
3541                 mtx = sim->mtx;
3542                 if (mtx && !mtx_owned(mtx))
3543                         mtx_lock(mtx);
3544                 else
3545                         mtx = NULL;
3546                 work_ccb->ccb_h.qos.periph_data = cam_iosched_now();
3547                 (*(sim->sim_action))(sim, work_ccb);
3548                 if (mtx)
3549                         mtx_unlock(mtx);
3550                 mtx_lock(&devq->send_mtx);
3551         }
3552         devq->send_queue.qfrozen_cnt--;
3553 }
3554
3555 /*
3556  * This function merges stuff from the slave ccb into the master ccb, while
3557  * keeping important fields in the master ccb constant.
3558  */
3559 void
3560 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3561 {
3562
3563         /*
3564          * Pull fields that are valid for peripheral drivers to set
3565          * into the master CCB along with the CCB "payload".
3566          */
3567         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3568         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3569         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3570         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3571         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3572               sizeof(union ccb) - sizeof(struct ccb_hdr));
3573 }
3574
3575 void
3576 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3577                     u_int32_t priority, u_int32_t flags)
3578 {
3579
3580         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3581         ccb_h->pinfo.priority = priority;
3582         ccb_h->path = path;
3583         ccb_h->path_id = path->bus->path_id;
3584         if (path->target)
3585                 ccb_h->target_id = path->target->target_id;
3586         else
3587                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3588         if (path->device) {
3589                 ccb_h->target_lun = path->device->lun_id;
3590                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3591         } else {
3592                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3593         }
3594         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3595         ccb_h->flags = flags;
3596         ccb_h->xflags = 0;
3597 }
3598
3599 void
3600 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3601 {
3602         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3603 }
3604
3605 /* Path manipulation functions */
3606 cam_status
3607 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3608                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3609 {
3610         struct     cam_path *path;
3611         cam_status status;
3612
3613         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3614
3615         if (path == NULL) {
3616                 status = CAM_RESRC_UNAVAIL;
3617                 return(status);
3618         }
3619         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3620         if (status != CAM_REQ_CMP) {
3621                 free(path, M_CAMPATH);
3622                 path = NULL;
3623         }
3624         *new_path_ptr = path;
3625         return (status);
3626 }
3627
3628 cam_status
3629 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3630                          struct cam_periph *periph, path_id_t path_id,
3631                          target_id_t target_id, lun_id_t lun_id)
3632 {
3633
3634         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3635             lun_id));
3636 }
3637
3638 cam_status
3639 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3640                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3641 {
3642         struct       cam_eb *bus;
3643         struct       cam_et *target;
3644         struct       cam_ed *device;
3645         cam_status   status;
3646
3647         status = CAM_REQ_CMP;   /* Completed without error */
3648         target = NULL;          /* Wildcarded */
3649         device = NULL;          /* Wildcarded */
3650
3651         /*
3652          * We will potentially modify the EDT, so block interrupts
3653          * that may attempt to create cam paths.
3654          */
3655         bus = xpt_find_bus(path_id);
3656         if (bus == NULL) {
3657                 status = CAM_PATH_INVALID;
3658         } else {
3659                 xpt_lock_buses();
3660                 mtx_lock(&bus->eb_mtx);
3661                 target = xpt_find_target(bus, target_id);
3662                 if (target == NULL) {
3663                         /* Create one */
3664                         struct cam_et *new_target;
3665
3666                         new_target = xpt_alloc_target(bus, target_id);
3667                         if (new_target == NULL) {
3668                                 status = CAM_RESRC_UNAVAIL;
3669                         } else {
3670                                 target = new_target;
3671                         }
3672                 }
3673                 xpt_unlock_buses();
3674                 if (target != NULL) {
3675                         device = xpt_find_device(target, lun_id);
3676                         if (device == NULL) {
3677                                 /* Create one */
3678                                 struct cam_ed *new_device;
3679
3680                                 new_device =
3681                                     (*(bus->xport->ops->alloc_device))(bus,
3682                                                                        target,
3683                                                                        lun_id);
3684                                 if (new_device == NULL) {
3685                                         status = CAM_RESRC_UNAVAIL;
3686                                 } else {
3687                                         device = new_device;
3688                                 }
3689                         }
3690                 }
3691                 mtx_unlock(&bus->eb_mtx);
3692         }
3693
3694         /*
3695          * Only touch the user's data if we are successful.
3696          */
3697         if (status == CAM_REQ_CMP) {
3698                 new_path->periph = perph;
3699                 new_path->bus = bus;
3700                 new_path->target = target;
3701                 new_path->device = device;
3702                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3703         } else {
3704                 if (device != NULL)
3705                         xpt_release_device(device);
3706                 if (target != NULL)
3707                         xpt_release_target(target);
3708                 if (bus != NULL)
3709                         xpt_release_bus(bus);
3710         }
3711         return (status);
3712 }
3713
3714 cam_status
3715 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3716 {
3717         struct     cam_path *new_path;
3718
3719         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3720         if (new_path == NULL)
3721                 return(CAM_RESRC_UNAVAIL);
3722         xpt_copy_path(new_path, path);
3723         *new_path_ptr = new_path;
3724         return (CAM_REQ_CMP);
3725 }
3726
3727 void
3728 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3729 {
3730
3731         *new_path = *path;
3732         if (path->bus != NULL)
3733                 xpt_acquire_bus(path->bus);
3734         if (path->target != NULL)
3735                 xpt_acquire_target(path->target);
3736         if (path->device != NULL)
3737                 xpt_acquire_device(path->device);
3738 }
3739
3740 void
3741 xpt_release_path(struct cam_path *path)
3742 {
3743         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3744         if (path->device != NULL) {
3745                 xpt_release_device(path->device);
3746                 path->device = NULL;
3747         }
3748         if (path->target != NULL) {
3749                 xpt_release_target(path->target);
3750                 path->target = NULL;
3751         }
3752         if (path->bus != NULL) {
3753                 xpt_release_bus(path->bus);
3754                 path->bus = NULL;
3755         }
3756 }
3757
3758 void
3759 xpt_free_path(struct cam_path *path)
3760 {
3761
3762         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3763         xpt_release_path(path);
3764         free(path, M_CAMPATH);
3765 }
3766
3767 void
3768 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3769     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3770 {
3771
3772         xpt_lock_buses();
3773         if (bus_ref) {
3774                 if (path->bus)
3775                         *bus_ref = path->bus->refcount;
3776                 else
3777                         *bus_ref = 0;
3778         }
3779         if (periph_ref) {
3780                 if (path->periph)
3781                         *periph_ref = path->periph->refcount;
3782                 else
3783                         *periph_ref = 0;
3784         }
3785         xpt_unlock_buses();
3786         if (target_ref) {
3787                 if (path->target)
3788                         *target_ref = path->target->refcount;
3789                 else
3790                         *target_ref = 0;
3791         }
3792         if (device_ref) {
3793                 if (path->device)
3794                         *device_ref = path->device->refcount;
3795                 else
3796                         *device_ref = 0;
3797         }
3798 }
3799
3800 /*
3801  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3802  * in path1, 2 for match with wildcards in path2.
3803  */
3804 int
3805 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3806 {
3807         int retval = 0;
3808
3809         if (path1->bus != path2->bus) {
3810                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3811                         retval = 1;
3812                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3813                         retval = 2;
3814                 else
3815                         return (-1);
3816         }
3817         if (path1->target != path2->target) {
3818                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3819                         if (retval == 0)
3820                                 retval = 1;
3821                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3822                         retval = 2;
3823                 else
3824                         return (-1);
3825         }
3826         if (path1->device != path2->device) {
3827                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3828                         if (retval == 0)
3829                                 retval = 1;
3830                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3831                         retval = 2;
3832                 else
3833                         return (-1);
3834         }
3835         return (retval);
3836 }
3837
3838 int
3839 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3840 {
3841         int retval = 0;
3842
3843         if (path->bus != dev->target->bus) {
3844                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3845                         retval = 1;
3846                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3847                         retval = 2;
3848                 else
3849                         return (-1);
3850         }
3851         if (path->target != dev->target) {
3852                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3853                         if (retval == 0)
3854                                 retval = 1;
3855                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3856                         retval = 2;
3857                 else
3858                         return (-1);
3859         }
3860         if (path->device != dev) {
3861                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3862                         if (retval == 0)
3863                                 retval = 1;
3864                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3865                         retval = 2;
3866                 else
3867                         return (-1);
3868         }
3869         return (retval);
3870 }
3871
3872 void
3873 xpt_print_path(struct cam_path *path)
3874 {
3875         struct sbuf sb;
3876         char buffer[XPT_PRINT_LEN];
3877
3878         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3879         xpt_path_sbuf(path, &sb);
3880         sbuf_finish(&sb);
3881         printf("%s", sbuf_data(&sb));
3882         sbuf_delete(&sb);
3883 }
3884
3885 void
3886 xpt_print_device(struct cam_ed *device)
3887 {
3888
3889         if (device == NULL)
3890                 printf("(nopath): ");
3891         else {
3892                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3893                        device->sim->unit_number,
3894                        device->sim->bus_id,
3895                        device->target->target_id,
3896                        (uintmax_t)device->lun_id);
3897         }
3898 }
3899
3900 void
3901 xpt_print(struct cam_path *path, const char *fmt, ...)
3902 {
3903         va_list ap;
3904         struct sbuf sb;
3905         char buffer[XPT_PRINT_LEN];
3906
3907         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3908
3909         xpt_path_sbuf(path, &sb);
3910         va_start(ap, fmt);
3911         sbuf_vprintf(&sb, fmt, ap);
3912         va_end(ap);
3913
3914         sbuf_finish(&sb);
3915         printf("%s", sbuf_data(&sb));
3916         sbuf_delete(&sb);
3917 }
3918
3919 int
3920 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3921 {
3922         struct sbuf sb;
3923         int len;
3924
3925         sbuf_new(&sb, str, str_len, 0);
3926         len = xpt_path_sbuf(path, &sb);
3927         sbuf_finish(&sb);
3928         return (len);
3929 }
3930
3931 int
3932 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb)
3933 {
3934
3935         if (path == NULL)
3936                 sbuf_printf(sb, "(nopath): ");
3937         else {
3938                 if (path->periph != NULL)
3939                         sbuf_printf(sb, "(%s%d:", path->periph->periph_name,
3940                                     path->periph->unit_number);
3941                 else
3942                         sbuf_printf(sb, "(noperiph:");
3943
3944                 if (path->bus != NULL)
3945                         sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name,
3946                                     path->bus->sim->unit_number,
3947                                     path->bus->sim->bus_id);
3948                 else
3949                         sbuf_printf(sb, "nobus:");
3950
3951                 if (path->target != NULL)
3952                         sbuf_printf(sb, "%d:", path->target->target_id);
3953                 else
3954                         sbuf_printf(sb, "X:");
3955
3956                 if (path->device != NULL)
3957                         sbuf_printf(sb, "%jx): ",
3958                             (uintmax_t)path->device->lun_id);
3959                 else
3960                         sbuf_printf(sb, "X): ");
3961         }
3962
3963         return(sbuf_len(sb));
3964 }
3965
3966 path_id_t
3967 xpt_path_path_id(struct cam_path *path)
3968 {
3969         return(path->bus->path_id);
3970 }
3971
3972 target_id_t
3973 xpt_path_target_id(struct cam_path *path)
3974 {
3975         if (path->target != NULL)
3976                 return (path->target->target_id);
3977         else
3978                 return (CAM_TARGET_WILDCARD);
3979 }
3980
3981 lun_id_t
3982 xpt_path_lun_id(struct cam_path *path)
3983 {
3984         if (path->device != NULL)
3985                 return (path->device->lun_id);
3986         else
3987                 return (CAM_LUN_WILDCARD);
3988 }
3989
3990 struct cam_sim *
3991 xpt_path_sim(struct cam_path *path)
3992 {
3993
3994         return (path->bus->sim);
3995 }
3996
3997 struct cam_periph*
3998 xpt_path_periph(struct cam_path *path)
3999 {
4000
4001         return (path->periph);
4002 }
4003
4004 /*
4005  * Release a CAM control block for the caller.  Remit the cost of the structure
4006  * to the device referenced by the path.  If the this device had no 'credits'
4007  * and peripheral drivers have registered async callbacks for this notification
4008  * call them now.
4009  */
4010 void
4011 xpt_release_ccb(union ccb *free_ccb)
4012 {
4013         struct   cam_ed *device;
4014         struct   cam_periph *periph;
4015
4016         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
4017         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
4018         device = free_ccb->ccb_h.path->device;
4019         periph = free_ccb->ccb_h.path->periph;
4020
4021         xpt_free_ccb(free_ccb);
4022         periph->periph_allocated--;
4023         cam_ccbq_release_opening(&device->ccbq);
4024         xpt_run_allocq(periph, 0);
4025 }
4026
4027 /* Functions accessed by SIM drivers */
4028
4029 static struct xpt_xport_ops xport_default_ops = {
4030         .alloc_device = xpt_alloc_device_default,
4031         .action = xpt_action_default,
4032         .async = xpt_dev_async_default,
4033 };
4034 static struct xpt_xport xport_default = {
4035         .xport = XPORT_UNKNOWN,
4036         .name = "unknown",
4037         .ops = &xport_default_ops,
4038 };
4039
4040 CAM_XPT_XPORT(xport_default);
4041
4042 /*
4043  * A sim structure, listing the SIM entry points and instance
4044  * identification info is passed to xpt_bus_register to hook the SIM
4045  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
4046  * for this new bus and places it in the array of buses and assigns
4047  * it a path_id.  The path_id may be influenced by "hard wiring"
4048  * information specified by the user.  Once interrupt services are
4049  * available, the bus will be probed.
4050  */
4051 int32_t
4052 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
4053 {
4054         struct cam_eb *new_bus;
4055         struct cam_eb *old_bus;
4056         struct ccb_pathinq cpi;
4057         struct cam_path *path;
4058         cam_status status;
4059
4060         sim->bus_id = bus;
4061         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4062                                           M_CAMXPT, M_NOWAIT|M_ZERO);
4063         if (new_bus == NULL) {
4064                 /* Couldn't satisfy request */
4065                 return (CAM_RESRC_UNAVAIL);
4066         }
4067
4068         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
4069         TAILQ_INIT(&new_bus->et_entries);
4070         cam_sim_hold(sim);
4071         new_bus->sim = sim;
4072         timevalclear(&new_bus->last_reset);
4073         new_bus->flags = 0;
4074         new_bus->refcount = 1;  /* Held until a bus_deregister event */
4075         new_bus->generation = 0;
4076
4077         xpt_lock_buses();
4078         sim->path_id = new_bus->path_id =
4079             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4080         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4081         while (old_bus != NULL
4082             && old_bus->path_id < new_bus->path_id)
4083                 old_bus = TAILQ_NEXT(old_bus, links);
4084         if (old_bus != NULL)
4085                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4086         else
4087                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
4088         xsoftc.bus_generation++;
4089         xpt_unlock_buses();
4090
4091         /*
4092          * Set a default transport so that a PATH_INQ can be issued to
4093          * the SIM.  This will then allow for probing and attaching of
4094          * a more appropriate transport.
4095          */
4096         new_bus->xport = &xport_default;
4097
4098         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
4099                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4100         if (status != CAM_REQ_CMP) {
4101                 xpt_release_bus(new_bus);
4102                 return (CAM_RESRC_UNAVAIL);
4103         }
4104
4105         xpt_path_inq(&cpi, path);
4106
4107         if (cpi.ccb_h.status == CAM_REQ_CMP) {
4108                 struct xpt_xport **xpt;
4109
4110                 SET_FOREACH(xpt, cam_xpt_xport_set) {
4111                         if ((*xpt)->xport == cpi.transport) {
4112                                 new_bus->xport = *xpt;
4113                                 break;
4114                         }
4115                 }
4116                 if (new_bus->xport == NULL) {
4117                         xpt_print(path,
4118                             "No transport found for %d\n", cpi.transport);
4119                         xpt_release_bus(new_bus);
4120                         free(path, M_CAMXPT);
4121                         return (CAM_RESRC_UNAVAIL);
4122                 }
4123         }
4124
4125         /* Notify interested parties */
4126         if (sim->path_id != CAM_XPT_PATH_ID) {
4127
4128                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
4129                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
4130                         union   ccb *scan_ccb;
4131
4132                         /* Initiate bus rescan. */
4133                         scan_ccb = xpt_alloc_ccb_nowait();
4134                         if (scan_ccb != NULL) {
4135                                 scan_ccb->ccb_h.path = path;
4136                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
4137                                 scan_ccb->crcn.flags = 0;
4138                                 xpt_rescan(scan_ccb);
4139                         } else {
4140                                 xpt_print(path,
4141                                           "Can't allocate CCB to scan bus\n");
4142                                 xpt_free_path(path);
4143                         }
4144                 } else
4145                         xpt_free_path(path);
4146         } else
4147                 xpt_free_path(path);
4148         return (CAM_SUCCESS);
4149 }
4150
4151 int32_t
4152 xpt_bus_deregister(path_id_t pathid)
4153 {
4154         struct cam_path bus_path;
4155         cam_status status;
4156
4157         status = xpt_compile_path(&bus_path, NULL, pathid,
4158                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4159         if (status != CAM_REQ_CMP)
4160                 return (status);
4161
4162         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4163         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4164
4165         /* Release the reference count held while registered. */
4166         xpt_release_bus(bus_path.bus);
4167         xpt_release_path(&bus_path);
4168
4169         return (CAM_REQ_CMP);
4170 }
4171
4172 static path_id_t
4173 xptnextfreepathid(void)
4174 {
4175         struct cam_eb *bus;
4176         path_id_t pathid;
4177         const char *strval;
4178
4179         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4180         pathid = 0;
4181         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4182 retry:
4183         /* Find an unoccupied pathid */
4184         while (bus != NULL && bus->path_id <= pathid) {
4185                 if (bus->path_id == pathid)
4186                         pathid++;
4187                 bus = TAILQ_NEXT(bus, links);
4188         }
4189
4190         /*
4191          * Ensure that this pathid is not reserved for
4192          * a bus that may be registered in the future.
4193          */
4194         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4195                 ++pathid;
4196                 /* Start the search over */
4197                 goto retry;
4198         }
4199         return (pathid);
4200 }
4201
4202 static path_id_t
4203 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4204 {
4205         path_id_t pathid;
4206         int i, dunit, val;
4207         char buf[32];
4208         const char *dname;
4209
4210         pathid = CAM_XPT_PATH_ID;
4211         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4212         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4213                 return (pathid);
4214         i = 0;
4215         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4216                 if (strcmp(dname, "scbus")) {
4217                         /* Avoid a bit of foot shooting. */
4218                         continue;
4219                 }
4220                 if (dunit < 0)          /* unwired?! */
4221                         continue;
4222                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4223                         if (sim_bus == val) {
4224                                 pathid = dunit;
4225                                 break;
4226                         }
4227                 } else if (sim_bus == 0) {
4228                         /* Unspecified matches bus 0 */
4229                         pathid = dunit;
4230                         break;
4231                 } else {
4232                         printf("Ambiguous scbus configuration for %s%d "
4233                                "bus %d, cannot wire down.  The kernel "
4234                                "config entry for scbus%d should "
4235                                "specify a controller bus.\n"
4236                                "Scbus will be assigned dynamically.\n",
4237                                sim_name, sim_unit, sim_bus, dunit);
4238                         break;
4239                 }
4240         }
4241
4242         if (pathid == CAM_XPT_PATH_ID)
4243                 pathid = xptnextfreepathid();
4244         return (pathid);
4245 }
4246
4247 static const char *
4248 xpt_async_string(u_int32_t async_code)
4249 {
4250
4251         switch (async_code) {
4252         case AC_BUS_RESET: return ("AC_BUS_RESET");
4253         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4254         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4255         case AC_SENT_BDR: return ("AC_SENT_BDR");
4256         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4257         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4258         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4259         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4260         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4261         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4262         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4263         case AC_CONTRACT: return ("AC_CONTRACT");
4264         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4265         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4266         }
4267         return ("AC_UNKNOWN");
4268 }
4269
4270 static int
4271 xpt_async_size(u_int32_t async_code)
4272 {
4273
4274         switch (async_code) {
4275         case AC_BUS_RESET: return (0);
4276         case AC_UNSOL_RESEL: return (0);
4277         case AC_SCSI_AEN: return (0);
4278         case AC_SENT_BDR: return (0);
4279         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4280         case AC_PATH_DEREGISTERED: return (0);
4281         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4282         case AC_LOST_DEVICE: return (0);
4283         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4284         case AC_INQ_CHANGED: return (0);
4285         case AC_GETDEV_CHANGED: return (0);
4286         case AC_CONTRACT: return (sizeof(struct ac_contract));
4287         case AC_ADVINFO_CHANGED: return (-1);
4288         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4289         }
4290         return (0);
4291 }
4292
4293 static int
4294 xpt_async_process_dev(struct cam_ed *device, void *arg)
4295 {
4296         union ccb *ccb = arg;
4297         struct cam_path *path = ccb->ccb_h.path;
4298         void *async_arg = ccb->casync.async_arg_ptr;
4299         u_int32_t async_code = ccb->casync.async_code;
4300         int relock;
4301
4302         if (path->device != device
4303          && path->device->lun_id != CAM_LUN_WILDCARD
4304          && device->lun_id != CAM_LUN_WILDCARD)
4305                 return (1);
4306
4307         /*
4308          * The async callback could free the device.
4309          * If it is a broadcast async, it doesn't hold
4310          * device reference, so take our own reference.
4311          */
4312         xpt_acquire_device(device);
4313
4314         /*
4315          * If async for specific device is to be delivered to
4316          * the wildcard client, take the specific device lock.
4317          * XXX: We may need a way for client to specify it.
4318          */
4319         if ((device->lun_id == CAM_LUN_WILDCARD &&
4320              path->device->lun_id != CAM_LUN_WILDCARD) ||
4321             (device->target->target_id == CAM_TARGET_WILDCARD &&
4322              path->target->target_id != CAM_TARGET_WILDCARD) ||
4323             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4324              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4325                 mtx_unlock(&device->device_mtx);
4326                 xpt_path_lock(path);
4327                 relock = 1;
4328         } else
4329                 relock = 0;
4330
4331         (*(device->target->bus->xport->ops->async))(async_code,
4332             device->target->bus, device->target, device, async_arg);
4333         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4334
4335         if (relock) {
4336                 xpt_path_unlock(path);
4337                 mtx_lock(&device->device_mtx);
4338         }
4339         xpt_release_device(device);
4340         return (1);
4341 }
4342
4343 static int
4344 xpt_async_process_tgt(struct cam_et *target, void *arg)
4345 {
4346         union ccb *ccb = arg;
4347         struct cam_path *path = ccb->ccb_h.path;
4348
4349         if (path->target != target
4350          && path->target->target_id != CAM_TARGET_WILDCARD
4351          && target->target_id != CAM_TARGET_WILDCARD)
4352                 return (1);
4353
4354         if (ccb->casync.async_code == AC_SENT_BDR) {
4355                 /* Update our notion of when the last reset occurred */
4356                 microtime(&target->last_reset);
4357         }
4358
4359         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4360 }
4361
4362 static void
4363 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4364 {
4365         struct cam_eb *bus;
4366         struct cam_path *path;
4367         void *async_arg;
4368         u_int32_t async_code;
4369
4370         path = ccb->ccb_h.path;
4371         async_code = ccb->casync.async_code;
4372         async_arg = ccb->casync.async_arg_ptr;
4373         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4374             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4375         bus = path->bus;
4376
4377         if (async_code == AC_BUS_RESET) {
4378                 /* Update our notion of when the last reset occurred */
4379                 microtime(&bus->last_reset);
4380         }
4381
4382         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4383
4384         /*
4385          * If this wasn't a fully wildcarded async, tell all
4386          * clients that want all async events.
4387          */
4388         if (bus != xpt_periph->path->bus) {
4389                 xpt_path_lock(xpt_periph->path);
4390                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4391                 xpt_path_unlock(xpt_periph->path);
4392         }
4393
4394         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4395                 xpt_release_devq(path, 1, TRUE);
4396         else
4397                 xpt_release_simq(path->bus->sim, TRUE);
4398         if (ccb->casync.async_arg_size > 0)
4399                 free(async_arg, M_CAMXPT);
4400         xpt_free_path(path);
4401         xpt_free_ccb(ccb);
4402 }
4403
4404 static void
4405 xpt_async_bcast(struct async_list *async_head,
4406                 u_int32_t async_code,
4407                 struct cam_path *path, void *async_arg)
4408 {
4409         struct async_node *cur_entry;
4410         struct mtx *mtx;
4411
4412         cur_entry = SLIST_FIRST(async_head);
4413         while (cur_entry != NULL) {
4414                 struct async_node *next_entry;
4415                 /*
4416                  * Grab the next list entry before we call the current
4417                  * entry's callback.  This is because the callback function
4418                  * can delete its async callback entry.
4419                  */
4420                 next_entry = SLIST_NEXT(cur_entry, links);
4421                 if ((cur_entry->event_enable & async_code) != 0) {
4422                         mtx = cur_entry->event_lock ?
4423                             path->device->sim->mtx : NULL;
4424                         if (mtx)
4425                                 mtx_lock(mtx);
4426                         cur_entry->callback(cur_entry->callback_arg,
4427                                             async_code, path,
4428                                             async_arg);
4429                         if (mtx)
4430                                 mtx_unlock(mtx);
4431                 }
4432                 cur_entry = next_entry;
4433         }
4434 }
4435
4436 void
4437 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4438 {
4439         union ccb *ccb;
4440         int size;
4441
4442         ccb = xpt_alloc_ccb_nowait();
4443         if (ccb == NULL) {
4444                 xpt_print(path, "Can't allocate CCB to send %s\n",
4445                     xpt_async_string(async_code));
4446                 return;
4447         }
4448
4449         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4450                 xpt_print(path, "Can't allocate path to send %s\n",
4451                     xpt_async_string(async_code));
4452                 xpt_free_ccb(ccb);
4453                 return;
4454         }
4455         ccb->ccb_h.path->periph = NULL;
4456         ccb->ccb_h.func_code = XPT_ASYNC;
4457         ccb->ccb_h.cbfcnp = xpt_async_process;
4458         ccb->ccb_h.flags |= CAM_UNLOCKED;
4459         ccb->casync.async_code = async_code;
4460         ccb->casync.async_arg_size = 0;
4461         size = xpt_async_size(async_code);
4462         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
4463             ("xpt_async: func %#x %s aync_code %d %s\n",
4464                 ccb->ccb_h.func_code,
4465                 xpt_action_name(ccb->ccb_h.func_code),
4466                 async_code,
4467                 xpt_async_string(async_code)));
4468         if (size > 0 && async_arg != NULL) {
4469                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4470                 if (ccb->casync.async_arg_ptr == NULL) {
4471                         xpt_print(path, "Can't allocate argument to send %s\n",
4472                             xpt_async_string(async_code));
4473                         xpt_free_path(ccb->ccb_h.path);
4474                         xpt_free_ccb(ccb);
4475                         return;
4476                 }
4477                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4478                 ccb->casync.async_arg_size = size;
4479         } else if (size < 0) {
4480                 ccb->casync.async_arg_ptr = async_arg;
4481                 ccb->casync.async_arg_size = size;
4482         }
4483         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4484                 xpt_freeze_devq(path, 1);
4485         else
4486                 xpt_freeze_simq(path->bus->sim, 1);
4487         xpt_done(ccb);
4488 }
4489
4490 static void
4491 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4492                       struct cam_et *target, struct cam_ed *device,
4493                       void *async_arg)
4494 {
4495
4496         /*
4497          * We only need to handle events for real devices.
4498          */
4499         if (target->target_id == CAM_TARGET_WILDCARD
4500          || device->lun_id == CAM_LUN_WILDCARD)
4501                 return;
4502
4503         printf("%s called\n", __func__);
4504 }
4505
4506 static uint32_t
4507 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4508 {
4509         struct cam_devq *devq;
4510         uint32_t freeze;
4511
4512         devq = dev->sim->devq;
4513         mtx_assert(&devq->send_mtx, MA_OWNED);
4514         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4515             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4516             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4517         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4518         /* Remove frozen device from sendq. */
4519         if (device_is_queued(dev))
4520                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4521         return (freeze);
4522 }
4523
4524 u_int32_t
4525 xpt_freeze_devq(struct cam_path *path, u_int count)
4526 {
4527         struct cam_ed   *dev = path->device;
4528         struct cam_devq *devq;
4529         uint32_t         freeze;
4530
4531         devq = dev->sim->devq;
4532         mtx_lock(&devq->send_mtx);
4533         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4534         freeze = xpt_freeze_devq_device(dev, count);
4535         mtx_unlock(&devq->send_mtx);
4536         return (freeze);
4537 }
4538
4539 u_int32_t
4540 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4541 {
4542         struct cam_devq *devq;
4543         uint32_t         freeze;
4544
4545         devq = sim->devq;
4546         mtx_lock(&devq->send_mtx);
4547         freeze = (devq->send_queue.qfrozen_cnt += count);
4548         mtx_unlock(&devq->send_mtx);
4549         return (freeze);
4550 }
4551
4552 static void
4553 xpt_release_devq_timeout(void *arg)
4554 {
4555         struct cam_ed *dev;
4556         struct cam_devq *devq;
4557
4558         dev = (struct cam_ed *)arg;
4559         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4560         devq = dev->sim->devq;
4561         mtx_assert(&devq->send_mtx, MA_OWNED);
4562         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4563                 xpt_run_devq(devq);
4564 }
4565
4566 void
4567 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4568 {
4569         struct cam_ed *dev;
4570         struct cam_devq *devq;
4571
4572         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4573             count, run_queue));
4574         dev = path->device;
4575         devq = dev->sim->devq;
4576         mtx_lock(&devq->send_mtx);
4577         if (xpt_release_devq_device(dev, count, run_queue))
4578                 xpt_run_devq(dev->sim->devq);
4579         mtx_unlock(&devq->send_mtx);
4580 }
4581
4582 static int
4583 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4584 {
4585
4586         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4587         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4588             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4589             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4590         if (count > dev->ccbq.queue.qfrozen_cnt) {
4591 #ifdef INVARIANTS
4592                 printf("xpt_release_devq(): requested %u > present %u\n",
4593                     count, dev->ccbq.queue.qfrozen_cnt);
4594 #endif
4595                 count = dev->ccbq.queue.qfrozen_cnt;
4596         }
4597         dev->ccbq.queue.qfrozen_cnt -= count;
4598         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4599                 /*
4600                  * No longer need to wait for a successful
4601                  * command completion.
4602                  */
4603                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4604                 /*
4605                  * Remove any timeouts that might be scheduled
4606                  * to release this queue.
4607                  */
4608                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4609                         callout_stop(&dev->callout);
4610                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4611                 }
4612                 /*
4613                  * Now that we are unfrozen schedule the
4614                  * device so any pending transactions are
4615                  * run.
4616                  */
4617                 xpt_schedule_devq(dev->sim->devq, dev);
4618         } else
4619                 run_queue = 0;
4620         return (run_queue);
4621 }
4622
4623 void
4624 xpt_release_simq(struct cam_sim *sim, int run_queue)
4625 {
4626         struct cam_devq *devq;
4627
4628         devq = sim->devq;
4629         mtx_lock(&devq->send_mtx);
4630         if (devq->send_queue.qfrozen_cnt <= 0) {
4631 #ifdef INVARIANTS
4632                 printf("xpt_release_simq: requested 1 > present %u\n",
4633                     devq->send_queue.qfrozen_cnt);
4634 #endif
4635         } else
4636                 devq->send_queue.qfrozen_cnt--;
4637         if (devq->send_queue.qfrozen_cnt == 0) {
4638                 /*
4639                  * If there is a timeout scheduled to release this
4640                  * sim queue, remove it.  The queue frozen count is
4641                  * already at 0.
4642                  */
4643                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4644                         callout_stop(&sim->callout);
4645                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4646                 }
4647                 if (run_queue) {
4648                         /*
4649                          * Now that we are unfrozen run the send queue.
4650                          */
4651                         xpt_run_devq(sim->devq);
4652                 }
4653         }
4654         mtx_unlock(&devq->send_mtx);
4655 }
4656
4657 /*
4658  * XXX Appears to be unused.
4659  */
4660 static void
4661 xpt_release_simq_timeout(void *arg)
4662 {
4663         struct cam_sim *sim;
4664
4665         sim = (struct cam_sim *)arg;
4666         xpt_release_simq(sim, /* run_queue */ TRUE);
4667 }
4668
4669 void
4670 xpt_done(union ccb *done_ccb)
4671 {
4672         struct cam_doneq *queue;
4673         int     run, hash;
4674
4675 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4676         if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4677             done_ccb->csio.bio != NULL)
4678                 biotrack(done_ccb->csio.bio, __func__);
4679 #endif
4680
4681         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4682             ("xpt_done: func= %#x %s status %#x\n",
4683                 done_ccb->ccb_h.func_code,
4684                 xpt_action_name(done_ccb->ccb_h.func_code),
4685                 done_ccb->ccb_h.status));
4686         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4687                 return;
4688
4689         /* Store the time the ccb was in the sim */
4690         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4691         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4692             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4693         queue = &cam_doneqs[hash];
4694         mtx_lock(&queue->cam_doneq_mtx);
4695         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4696         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4697         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4698         mtx_unlock(&queue->cam_doneq_mtx);
4699         if (run)
4700                 wakeup(&queue->cam_doneq);
4701 }
4702
4703 void
4704 xpt_done_direct(union ccb *done_ccb)
4705 {
4706
4707         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4708             ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4709         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4710                 return;
4711
4712         /* Store the time the ccb was in the sim */
4713         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4714         xpt_done_process(&done_ccb->ccb_h);
4715 }
4716
4717 union ccb *
4718 xpt_alloc_ccb()
4719 {
4720         union ccb *new_ccb;
4721
4722         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4723         return (new_ccb);
4724 }
4725
4726 union ccb *
4727 xpt_alloc_ccb_nowait()
4728 {
4729         union ccb *new_ccb;
4730
4731         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4732         return (new_ccb);
4733 }
4734
4735 void
4736 xpt_free_ccb(union ccb *free_ccb)
4737 {
4738         free(free_ccb, M_CAMCCB);
4739 }
4740
4741
4742
4743 /* Private XPT functions */
4744
4745 /*
4746  * Get a CAM control block for the caller. Charge the structure to the device
4747  * referenced by the path.  If we don't have sufficient resources to allocate
4748  * more ccbs, we return NULL.
4749  */
4750 static union ccb *
4751 xpt_get_ccb_nowait(struct cam_periph *periph)
4752 {
4753         union ccb *new_ccb;
4754
4755         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4756         if (new_ccb == NULL)
4757                 return (NULL);
4758         periph->periph_allocated++;
4759         cam_ccbq_take_opening(&periph->path->device->ccbq);
4760         return (new_ccb);
4761 }
4762
4763 static union ccb *
4764 xpt_get_ccb(struct cam_periph *periph)
4765 {
4766         union ccb *new_ccb;
4767
4768         cam_periph_unlock(periph);
4769         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4770         cam_periph_lock(periph);
4771         periph->periph_allocated++;
4772         cam_ccbq_take_opening(&periph->path->device->ccbq);
4773         return (new_ccb);
4774 }
4775
4776 union ccb *
4777 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4778 {
4779         struct ccb_hdr *ccb_h;
4780
4781         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4782         cam_periph_assert(periph, MA_OWNED);
4783         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4784             ccb_h->pinfo.priority != priority) {
4785                 if (priority < periph->immediate_priority) {
4786                         periph->immediate_priority = priority;
4787                         xpt_run_allocq(periph, 0);
4788                 } else
4789                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4790                             "cgticb", 0);
4791         }
4792         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4793         return ((union ccb *)ccb_h);
4794 }
4795
4796 static void
4797 xpt_acquire_bus(struct cam_eb *bus)
4798 {
4799
4800         xpt_lock_buses();
4801         bus->refcount++;
4802         xpt_unlock_buses();
4803 }
4804
4805 static void
4806 xpt_release_bus(struct cam_eb *bus)
4807 {
4808
4809         xpt_lock_buses();
4810         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4811         if (--bus->refcount > 0) {
4812                 xpt_unlock_buses();
4813                 return;
4814         }
4815         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4816         xsoftc.bus_generation++;
4817         xpt_unlock_buses();
4818         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4819             ("destroying bus, but target list is not empty"));
4820         cam_sim_release(bus->sim);
4821         mtx_destroy(&bus->eb_mtx);
4822         free(bus, M_CAMXPT);
4823 }
4824
4825 static struct cam_et *
4826 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4827 {
4828         struct cam_et *cur_target, *target;
4829
4830         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4831         mtx_assert(&bus->eb_mtx, MA_OWNED);
4832         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4833                                          M_NOWAIT|M_ZERO);
4834         if (target == NULL)
4835                 return (NULL);
4836
4837         TAILQ_INIT(&target->ed_entries);
4838         target->bus = bus;
4839         target->target_id = target_id;
4840         target->refcount = 1;
4841         target->generation = 0;
4842         target->luns = NULL;
4843         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4844         timevalclear(&target->last_reset);
4845         /*
4846          * Hold a reference to our parent bus so it
4847          * will not go away before we do.
4848          */
4849         bus->refcount++;
4850
4851         /* Insertion sort into our bus's target list */
4852         cur_target = TAILQ_FIRST(&bus->et_entries);
4853         while (cur_target != NULL && cur_target->target_id < target_id)
4854                 cur_target = TAILQ_NEXT(cur_target, links);
4855         if (cur_target != NULL) {
4856                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4857         } else {
4858                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4859         }
4860         bus->generation++;
4861         return (target);
4862 }
4863
4864 static void
4865 xpt_acquire_target(struct cam_et *target)
4866 {
4867         struct cam_eb *bus = target->bus;
4868
4869         mtx_lock(&bus->eb_mtx);
4870         target->refcount++;
4871         mtx_unlock(&bus->eb_mtx);
4872 }
4873
4874 static void
4875 xpt_release_target(struct cam_et *target)
4876 {
4877         struct cam_eb *bus = target->bus;
4878
4879         mtx_lock(&bus->eb_mtx);
4880         if (--target->refcount > 0) {
4881                 mtx_unlock(&bus->eb_mtx);
4882                 return;
4883         }
4884         TAILQ_REMOVE(&bus->et_entries, target, links);
4885         bus->generation++;
4886         mtx_unlock(&bus->eb_mtx);
4887         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4888             ("destroying target, but device list is not empty"));
4889         xpt_release_bus(bus);
4890         mtx_destroy(&target->luns_mtx);
4891         if (target->luns)
4892                 free(target->luns, M_CAMXPT);
4893         free(target, M_CAMXPT);
4894 }
4895
4896 static struct cam_ed *
4897 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4898                          lun_id_t lun_id)
4899 {
4900         struct cam_ed *device;
4901
4902         device = xpt_alloc_device(bus, target, lun_id);
4903         if (device == NULL)
4904                 return (NULL);
4905
4906         device->mintags = 1;
4907         device->maxtags = 1;
4908         return (device);
4909 }
4910
4911 static void
4912 xpt_destroy_device(void *context, int pending)
4913 {
4914         struct cam_ed   *device = context;
4915
4916         mtx_lock(&device->device_mtx);
4917         mtx_destroy(&device->device_mtx);
4918         free(device, M_CAMDEV);
4919 }
4920
4921 struct cam_ed *
4922 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4923 {
4924         struct cam_ed   *cur_device, *device;
4925         struct cam_devq *devq;
4926         cam_status status;
4927
4928         mtx_assert(&bus->eb_mtx, MA_OWNED);
4929         /* Make space for us in the device queue on our bus */
4930         devq = bus->sim->devq;
4931         mtx_lock(&devq->send_mtx);
4932         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4933         mtx_unlock(&devq->send_mtx);
4934         if (status != CAM_REQ_CMP)
4935                 return (NULL);
4936
4937         device = (struct cam_ed *)malloc(sizeof(*device),
4938                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4939         if (device == NULL)
4940                 return (NULL);
4941
4942         cam_init_pinfo(&device->devq_entry);
4943         device->target = target;
4944         device->lun_id = lun_id;
4945         device->sim = bus->sim;
4946         if (cam_ccbq_init(&device->ccbq,
4947                           bus->sim->max_dev_openings) != 0) {
4948                 free(device, M_CAMDEV);
4949                 return (NULL);
4950         }
4951         SLIST_INIT(&device->asyncs);
4952         SLIST_INIT(&device->periphs);
4953         device->generation = 0;
4954         device->flags = CAM_DEV_UNCONFIGURED;
4955         device->tag_delay_count = 0;
4956         device->tag_saved_openings = 0;
4957         device->refcount = 1;
4958         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4959         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4960         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4961         /*
4962          * Hold a reference to our parent bus so it
4963          * will not go away before we do.
4964          */
4965         target->refcount++;
4966
4967         cur_device = TAILQ_FIRST(&target->ed_entries);
4968         while (cur_device != NULL && cur_device->lun_id < lun_id)
4969                 cur_device = TAILQ_NEXT(cur_device, links);
4970         if (cur_device != NULL)
4971                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4972         else
4973                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4974         target->generation++;
4975         return (device);
4976 }
4977
4978 void
4979 xpt_acquire_device(struct cam_ed *device)
4980 {
4981         struct cam_eb *bus = device->target->bus;
4982
4983         mtx_lock(&bus->eb_mtx);
4984         device->refcount++;
4985         mtx_unlock(&bus->eb_mtx);
4986 }
4987
4988 void
4989 xpt_release_device(struct cam_ed *device)
4990 {
4991         struct cam_eb *bus = device->target->bus;
4992         struct cam_devq *devq;
4993
4994         mtx_lock(&bus->eb_mtx);
4995         if (--device->refcount > 0) {
4996                 mtx_unlock(&bus->eb_mtx);
4997                 return;
4998         }
4999
5000         TAILQ_REMOVE(&device->target->ed_entries, device,links);
5001         device->target->generation++;
5002         mtx_unlock(&bus->eb_mtx);
5003
5004         /* Release our slot in the devq */
5005         devq = bus->sim->devq;
5006         mtx_lock(&devq->send_mtx);
5007         cam_devq_resize(devq, devq->send_queue.array_size - 1);
5008         mtx_unlock(&devq->send_mtx);
5009
5010         KASSERT(SLIST_EMPTY(&device->periphs),
5011             ("destroying device, but periphs list is not empty"));
5012         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
5013             ("destroying device while still queued for ccbs"));
5014
5015         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
5016                 callout_stop(&device->callout);
5017
5018         xpt_release_target(device->target);
5019
5020         cam_ccbq_fini(&device->ccbq);
5021         /*
5022          * Free allocated memory.  free(9) does nothing if the
5023          * supplied pointer is NULL, so it is safe to call without
5024          * checking.
5025          */
5026         free(device->supported_vpds, M_CAMXPT);
5027         free(device->device_id, M_CAMXPT);
5028         free(device->ext_inq, M_CAMXPT);
5029         free(device->physpath, M_CAMXPT);
5030         free(device->rcap_buf, M_CAMXPT);
5031         free(device->serial_num, M_CAMXPT);
5032         free(device->nvme_data, M_CAMXPT);
5033         free(device->nvme_cdata, M_CAMXPT);
5034         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
5035 }
5036
5037 u_int32_t
5038 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
5039 {
5040         int     result;
5041         struct  cam_ed *dev;
5042
5043         dev = path->device;
5044         mtx_lock(&dev->sim->devq->send_mtx);
5045         result = cam_ccbq_resize(&dev->ccbq, newopenings);
5046         mtx_unlock(&dev->sim->devq->send_mtx);
5047         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5048          || (dev->inq_flags & SID_CmdQue) != 0)
5049                 dev->tag_saved_openings = newopenings;
5050         return (result);
5051 }
5052
5053 static struct cam_eb *
5054 xpt_find_bus(path_id_t path_id)
5055 {
5056         struct cam_eb *bus;
5057
5058         xpt_lock_buses();
5059         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
5060              bus != NULL;
5061              bus = TAILQ_NEXT(bus, links)) {
5062                 if (bus->path_id == path_id) {
5063                         bus->refcount++;
5064                         break;
5065                 }
5066         }
5067         xpt_unlock_buses();
5068         return (bus);
5069 }
5070
5071 static struct cam_et *
5072 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5073 {
5074         struct cam_et *target;
5075
5076         mtx_assert(&bus->eb_mtx, MA_OWNED);
5077         for (target = TAILQ_FIRST(&bus->et_entries);
5078              target != NULL;
5079              target = TAILQ_NEXT(target, links)) {
5080                 if (target->target_id == target_id) {
5081                         target->refcount++;
5082                         break;
5083                 }
5084         }
5085         return (target);
5086 }
5087
5088 static struct cam_ed *
5089 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5090 {
5091         struct cam_ed *device;
5092
5093         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
5094         for (device = TAILQ_FIRST(&target->ed_entries);
5095              device != NULL;
5096              device = TAILQ_NEXT(device, links)) {
5097                 if (device->lun_id == lun_id) {
5098                         device->refcount++;
5099                         break;
5100                 }
5101         }
5102         return (device);
5103 }
5104
5105 void
5106 xpt_start_tags(struct cam_path *path)
5107 {
5108         struct ccb_relsim crs;
5109         struct cam_ed *device;
5110         struct cam_sim *sim;
5111         int    newopenings;
5112
5113         device = path->device;
5114         sim = path->bus->sim;
5115         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5116         xpt_freeze_devq(path, /*count*/1);
5117         device->inq_flags |= SID_CmdQue;
5118         if (device->tag_saved_openings != 0)
5119                 newopenings = device->tag_saved_openings;
5120         else
5121                 newopenings = min(device->maxtags,
5122                                   sim->max_tagged_dev_openings);
5123         xpt_dev_ccbq_resize(path, newopenings);
5124         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5125         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5126         crs.ccb_h.func_code = XPT_REL_SIMQ;
5127         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5128         crs.openings
5129             = crs.release_timeout
5130             = crs.qfrozen_cnt
5131             = 0;
5132         xpt_action((union ccb *)&crs);
5133 }
5134
5135 void
5136 xpt_stop_tags(struct cam_path *path)
5137 {
5138         struct ccb_relsim crs;
5139         struct cam_ed *device;
5140         struct cam_sim *sim;
5141
5142         device = path->device;
5143         sim = path->bus->sim;
5144         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5145         device->tag_delay_count = 0;
5146         xpt_freeze_devq(path, /*count*/1);
5147         device->inq_flags &= ~SID_CmdQue;
5148         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
5149         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5150         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5151         crs.ccb_h.func_code = XPT_REL_SIMQ;
5152         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5153         crs.openings
5154             = crs.release_timeout
5155             = crs.qfrozen_cnt
5156             = 0;
5157         xpt_action((union ccb *)&crs);
5158 }
5159
5160 static void
5161 xpt_boot_delay(void *arg)
5162 {
5163
5164         xpt_release_boot();
5165 }
5166
5167 static void
5168 xpt_config(void *arg)
5169 {
5170         /*
5171          * Now that interrupts are enabled, go find our devices
5172          */
5173         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
5174                 printf("xpt_config: failed to create taskqueue thread.\n");
5175
5176         /* Setup debugging path */
5177         if (cam_dflags != CAM_DEBUG_NONE) {
5178                 if (xpt_create_path(&cam_dpath, NULL,
5179                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
5180                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
5181                         printf("xpt_config: xpt_create_path() failed for debug"
5182                                " target %d:%d:%d, debugging disabled\n",
5183                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
5184                         cam_dflags = CAM_DEBUG_NONE;
5185                 }
5186         } else
5187                 cam_dpath = NULL;
5188
5189         periphdriver_init(1);
5190         xpt_hold_boot();
5191         callout_init(&xsoftc.boot_callout, 1);
5192         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5193             xpt_boot_delay, NULL, 0);
5194         /* Fire up rescan thread. */
5195         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5196             "cam", "scanner")) {
5197                 printf("xpt_config: failed to create rescan thread.\n");
5198         }
5199 }
5200
5201 void
5202 xpt_hold_boot(void)
5203 {
5204         xpt_lock_buses();
5205         xsoftc.buses_to_config++;
5206         xpt_unlock_buses();
5207 }
5208
5209 void
5210 xpt_release_boot(void)
5211 {
5212         xpt_lock_buses();
5213         xsoftc.buses_to_config--;
5214         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
5215                 struct  xpt_task *task;
5216
5217                 xsoftc.buses_config_done = 1;
5218                 xpt_unlock_buses();
5219                 /* Call manually because we don't have any buses */
5220                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
5221                 if (task != NULL) {
5222                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
5223                         taskqueue_enqueue(taskqueue_thread, &task->task);
5224                 }
5225         } else
5226                 xpt_unlock_buses();
5227 }
5228
5229 /*
5230  * If the given device only has one peripheral attached to it, and if that
5231  * peripheral is the passthrough driver, announce it.  This insures that the
5232  * user sees some sort of announcement for every peripheral in their system.
5233  */
5234 static int
5235 xptpassannouncefunc(struct cam_ed *device, void *arg)
5236 {
5237         struct cam_periph *periph;
5238         int i;
5239
5240         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5241              periph = SLIST_NEXT(periph, periph_links), i++);
5242
5243         periph = SLIST_FIRST(&device->periphs);
5244         if ((i == 1)
5245          && (strncmp(periph->periph_name, "pass", 4) == 0))
5246                 xpt_announce_periph(periph, NULL);
5247
5248         return(1);
5249 }
5250
5251 static void
5252 xpt_finishconfig_task(void *context, int pending)
5253 {
5254
5255         periphdriver_init(2);
5256         /*
5257          * Check for devices with no "standard" peripheral driver
5258          * attached.  For any devices like that, announce the
5259          * passthrough driver so the user will see something.
5260          */
5261         if (!bootverbose)
5262                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5263
5264         /* Release our hook so that the boot can continue. */
5265         config_intrhook_disestablish(xsoftc.xpt_config_hook);
5266         free(xsoftc.xpt_config_hook, M_CAMXPT);
5267         xsoftc.xpt_config_hook = NULL;
5268
5269         free(context, M_CAMXPT);
5270 }
5271
5272 cam_status
5273 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5274                    struct cam_path *path)
5275 {
5276         struct ccb_setasync csa;
5277         cam_status status;
5278         int xptpath = 0;
5279
5280         if (path == NULL) {
5281                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5282                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5283                 if (status != CAM_REQ_CMP)
5284                         return (status);
5285                 xpt_path_lock(path);
5286                 xptpath = 1;
5287         }
5288
5289         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5290         csa.ccb_h.func_code = XPT_SASYNC_CB;
5291         csa.event_enable = event;
5292         csa.callback = cbfunc;
5293         csa.callback_arg = cbarg;
5294         xpt_action((union ccb *)&csa);
5295         status = csa.ccb_h.status;
5296
5297         CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5298             ("xpt_register_async: func %p\n", cbfunc));
5299
5300         if (xptpath) {
5301                 xpt_path_unlock(path);
5302                 xpt_free_path(path);
5303         }
5304
5305         if ((status == CAM_REQ_CMP) &&
5306             (csa.event_enable & AC_FOUND_DEVICE)) {
5307                 /*
5308                  * Get this peripheral up to date with all
5309                  * the currently existing devices.
5310                  */
5311                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5312         }
5313         if ((status == CAM_REQ_CMP) &&
5314             (csa.event_enable & AC_PATH_REGISTERED)) {
5315                 /*
5316                  * Get this peripheral up to date with all
5317                  * the currently existing buses.
5318                  */
5319                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5320         }
5321
5322         return (status);
5323 }
5324
5325 static void
5326 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5327 {
5328         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5329
5330         switch (work_ccb->ccb_h.func_code) {
5331         /* Common cases first */
5332         case XPT_PATH_INQ:              /* Path routing inquiry */
5333         {
5334                 struct ccb_pathinq *cpi;
5335
5336                 cpi = &work_ccb->cpi;
5337                 cpi->version_num = 1; /* XXX??? */
5338                 cpi->hba_inquiry = 0;
5339                 cpi->target_sprt = 0;
5340                 cpi->hba_misc = 0;
5341                 cpi->hba_eng_cnt = 0;
5342                 cpi->max_target = 0;
5343                 cpi->max_lun = 0;
5344                 cpi->initiator_id = 0;
5345                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5346                 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5347                 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5348                 cpi->unit_number = sim->unit_number;
5349                 cpi->bus_id = sim->bus_id;
5350                 cpi->base_transfer_speed = 0;
5351                 cpi->protocol = PROTO_UNSPECIFIED;
5352                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5353                 cpi->transport = XPORT_UNSPECIFIED;
5354                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5355                 cpi->ccb_h.status = CAM_REQ_CMP;
5356                 xpt_done(work_ccb);
5357                 break;
5358         }
5359         default:
5360                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5361                 xpt_done(work_ccb);
5362                 break;
5363         }
5364 }
5365
5366 /*
5367  * The xpt as a "controller" has no interrupt sources, so polling
5368  * is a no-op.
5369  */
5370 static void
5371 xptpoll(struct cam_sim *sim)
5372 {
5373 }
5374
5375 void
5376 xpt_lock_buses(void)
5377 {
5378         mtx_lock(&xsoftc.xpt_topo_lock);
5379 }
5380
5381 void
5382 xpt_unlock_buses(void)
5383 {
5384         mtx_unlock(&xsoftc.xpt_topo_lock);
5385 }
5386
5387 struct mtx *
5388 xpt_path_mtx(struct cam_path *path)
5389 {
5390
5391         return (&path->device->device_mtx);
5392 }
5393
5394 static void
5395 xpt_done_process(struct ccb_hdr *ccb_h)
5396 {
5397         struct cam_sim *sim = NULL;
5398         struct cam_devq *devq = NULL;
5399         struct mtx *mtx = NULL;
5400
5401 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5402         struct ccb_scsiio *csio;
5403
5404         if (ccb_h->func_code == XPT_SCSI_IO) {
5405                 csio = &((union ccb *)ccb_h)->csio;
5406                 if (csio->bio != NULL)
5407                         biotrack(csio->bio, __func__);
5408         }
5409 #endif
5410
5411         if (ccb_h->flags & CAM_HIGH_POWER) {
5412                 struct highpowerlist    *hphead;
5413                 struct cam_ed           *device;
5414
5415                 mtx_lock(&xsoftc.xpt_highpower_lock);
5416                 hphead = &xsoftc.highpowerq;
5417
5418                 device = STAILQ_FIRST(hphead);
5419
5420                 /*
5421                  * Increment the count since this command is done.
5422                  */
5423                 xsoftc.num_highpower++;
5424
5425                 /*
5426                  * Any high powered commands queued up?
5427                  */
5428                 if (device != NULL) {
5429
5430                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5431                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5432
5433                         mtx_lock(&device->sim->devq->send_mtx);
5434                         xpt_release_devq_device(device,
5435                                          /*count*/1, /*runqueue*/TRUE);
5436                         mtx_unlock(&device->sim->devq->send_mtx);
5437                 } else
5438                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5439         }
5440
5441         /*
5442          * Insulate against a race where the periph is destroyed but CCBs are
5443          * still not all processed. This shouldn't happen, but allows us better
5444          * bug diagnostic when it does.
5445          */
5446         if (ccb_h->path->bus)
5447                 sim = ccb_h->path->bus->sim;
5448
5449         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5450                 KASSERT(sim, ("sim missing for CAM_RELEASE_SIMQ request"));
5451                 xpt_release_simq(sim, /*run_queue*/FALSE);
5452                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5453         }
5454
5455         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5456          && (ccb_h->status & CAM_DEV_QFRZN)) {
5457                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5458                 ccb_h->status &= ~CAM_DEV_QFRZN;
5459         }
5460
5461         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5462                 struct cam_ed *dev = ccb_h->path->device;
5463
5464                 if (sim)
5465                         devq = sim->devq;
5466                 KASSERT(devq, ("Periph disappeared with request pending."));
5467
5468                 mtx_lock(&devq->send_mtx);
5469                 devq->send_active--;
5470                 devq->send_openings++;
5471                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5472
5473                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5474                   && (dev->ccbq.dev_active == 0))) {
5475                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5476                         xpt_release_devq_device(dev, /*count*/1,
5477                                          /*run_queue*/FALSE);
5478                 }
5479
5480                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5481                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5482                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5483                         xpt_release_devq_device(dev, /*count*/1,
5484                                          /*run_queue*/FALSE);
5485                 }
5486
5487                 if (!device_is_queued(dev))
5488                         (void)xpt_schedule_devq(devq, dev);
5489                 xpt_run_devq(devq);
5490                 mtx_unlock(&devq->send_mtx);
5491
5492                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5493                         mtx = xpt_path_mtx(ccb_h->path);
5494                         mtx_lock(mtx);
5495
5496                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5497                          && (--dev->tag_delay_count == 0))
5498                                 xpt_start_tags(ccb_h->path);
5499                 }
5500         }
5501
5502         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5503                 if (mtx == NULL) {
5504                         mtx = xpt_path_mtx(ccb_h->path);
5505                         mtx_lock(mtx);
5506                 }
5507         } else {
5508                 if (mtx != NULL) {
5509                         mtx_unlock(mtx);
5510                         mtx = NULL;
5511                 }
5512         }
5513
5514         /* Call the peripheral driver's callback */
5515         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5516         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5517         if (mtx != NULL)
5518                 mtx_unlock(mtx);
5519 }
5520
5521 void
5522 xpt_done_td(void *arg)
5523 {
5524         struct cam_doneq *queue = arg;
5525         struct ccb_hdr *ccb_h;
5526         STAILQ_HEAD(, ccb_hdr)  doneq;
5527
5528         STAILQ_INIT(&doneq);
5529         mtx_lock(&queue->cam_doneq_mtx);
5530         while (1) {
5531                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5532                         queue->cam_doneq_sleep = 1;
5533                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5534                             PRIBIO, "-", 0);
5535                         queue->cam_doneq_sleep = 0;
5536                 }
5537                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5538                 mtx_unlock(&queue->cam_doneq_mtx);
5539
5540                 THREAD_NO_SLEEPING();
5541                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5542                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5543                         xpt_done_process(ccb_h);
5544                 }
5545                 THREAD_SLEEPING_OK();
5546
5547                 mtx_lock(&queue->cam_doneq_mtx);
5548         }
5549 }
5550
5551 static void
5552 camisr_runqueue(void)
5553 {
5554         struct  ccb_hdr *ccb_h;
5555         struct cam_doneq *queue;
5556         int i;
5557
5558         /* Process global queues. */
5559         for (i = 0; i < cam_num_doneqs; i++) {
5560                 queue = &cam_doneqs[i];
5561                 mtx_lock(&queue->cam_doneq_mtx);
5562                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5563                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5564                         mtx_unlock(&queue->cam_doneq_mtx);
5565                         xpt_done_process(ccb_h);
5566                         mtx_lock(&queue->cam_doneq_mtx);
5567                 }
5568                 mtx_unlock(&queue->cam_doneq_mtx);
5569         }
5570 }
5571
5572 struct kv
5573 {
5574         uint32_t v;
5575         const char *name;
5576 };
5577
5578 static struct kv map[] = {
5579         { XPT_NOOP, "XPT_NOOP" },
5580         { XPT_SCSI_IO, "XPT_SCSI_IO" },
5581         { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5582         { XPT_GDEVLIST, "XPT_GDEVLIST" },
5583         { XPT_PATH_INQ, "XPT_PATH_INQ" },
5584         { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5585         { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5586         { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5587         { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5588         { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5589         { XPT_DEBUG, "XPT_DEBUG" },
5590         { XPT_PATH_STATS, "XPT_PATH_STATS" },
5591         { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5592         { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5593         { XPT_ASYNC, "XPT_ASYNC" },
5594         { XPT_ABORT, "XPT_ABORT" },
5595         { XPT_RESET_BUS, "XPT_RESET_BUS" },
5596         { XPT_RESET_DEV, "XPT_RESET_DEV" },
5597         { XPT_TERM_IO, "XPT_TERM_IO" },
5598         { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5599         { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5600         { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5601         { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5602         { XPT_ATA_IO, "XPT_ATA_IO" },
5603         { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5604         { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5605         { XPT_NVME_IO, "XPT_NVME_IO" },
5606         { XPT_MMC_IO, "XPT_MMC_IO" },
5607         { XPT_SMP_IO, "XPT_SMP_IO" },
5608         { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5609         { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" },
5610         { XPT_ENG_INQ, "XPT_ENG_INQ" },
5611         { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5612         { XPT_EN_LUN, "XPT_EN_LUN" },
5613         { XPT_TARGET_IO, "XPT_TARGET_IO" },
5614         { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5615         { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5616         { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5617         { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5618         { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5619         { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5620         { 0, 0 }
5621 };
5622
5623 const char *
5624 xpt_action_name(uint32_t action)
5625 {
5626         static char buffer[32]; /* Only for unknown messages -- racy */
5627         struct kv *walker = map;
5628
5629         while (walker->name != NULL) {
5630                 if (walker->v == action)
5631                         return (walker->name);
5632                 walker++;
5633         }
5634
5635         snprintf(buffer, sizeof(buffer), "%#x", action);
5636         return (buffer);
5637 }