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