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/interrupt.h>
  48 #include <sys/proc.h>
  49 #include <sys/sbuf.h>
  50 #include <sys/smp.h>
  51 #include <sys/taskqueue.h>
  52
  53 #include <sys/lock.h>
  54 #include <sys/mutex.h>
  55 #include <sys/sysctl.h>
  56 #include <sys/kthread.h>
  57
  58 #include <cam/cam.h>
  59 #include <cam/cam_ccb.h>
  60 #include <cam/cam_iosched.h>
  61 #include <cam/cam_periph.h>
  62 #include <cam/cam_queue.h>
  63 #include <cam/cam_sim.h>
  64 #include <cam/cam_xpt.h>
  65 #include <cam/cam_xpt_sim.h>
  66 #include <cam/cam_xpt_periph.h>
  67 #include <cam/cam_xpt_internal.h>
  68 #include <cam/cam_debug.h>
  69 #include <cam/cam_compat.h>
  70
  71 #include <cam/scsi/scsi_all.h>
  72 #include <cam/scsi/scsi_message.h>
  73 #include <cam/scsi/scsi_pass.h>
  74
  75 #include <machine/md_var.h>     /* geometry translation */
  76 #include <machine/stdarg.h>     /* for xpt_print below */
  77
  78 #include "opt_cam.h"
  79
  80 /* Wild guess based on not wanting to grow the stack too much */
  81 #define XPT_PRINT_MAXLEN        512
  82 #ifdef PRINTF_BUFR_SIZE
  83 #define XPT_PRINT_LEN   PRINTF_BUFR_SIZE
  84 #else
  85 #define XPT_PRINT_LEN   128
  86 #endif
  87 _Static_assert(XPT_PRINT_LEN <= XPT_PRINT_MAXLEN, "XPT_PRINT_LEN is too large");
  88
  89 /*
  90  * This is the maximum number of high powered commands (e.g. start unit)
  91  * that can be outstanding at a particular time.
  92  */
  93 #ifndef CAM_MAX_HIGHPOWER
  94 #define CAM_MAX_HIGHPOWER  4
  95 #endif
  96
  97 /* Datastructures internal to the xpt layer */
  98 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
  99 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
 100 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
 101 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
 102
 103 /* Object for defering XPT actions to a taskqueue */
 104 struct xpt_task {
 105         struct task     task;
 106         void            *data1;
 107         uintptr_t       data2;
 108 };
 109
 110 struct xpt_softc {
 111         uint32_t                xpt_generation;
 112
 113         /* number of high powered commands that can go through right now */
 114         struct mtx              xpt_highpower_lock;
 115         STAILQ_HEAD(highpowerlist, cam_ed)      highpowerq;
 116         int                     num_highpower;
 117
 118         /* queue for handling async rescan requests. */
 119         TAILQ_HEAD(, ccb_hdr) ccb_scanq;
 120         int buses_to_config;
 121         int buses_config_done;
 122         int announce_nosbuf;
 123
 124         /*
 125          * Registered buses
 126          *
 127          * N.B., "busses" is an archaic spelling of "buses".  In new code
 128          * "buses" is preferred.
 129          */
 130         TAILQ_HEAD(,cam_eb)     xpt_busses;
 131         u_int                   bus_generation;
 132
 133         struct intr_config_hook *xpt_config_hook;
 134
 135         int                     boot_delay;
 136         struct callout          boot_callout;
 137
 138         struct mtx              xpt_topo_lock;
 139         struct mtx              xpt_lock;
 140         struct taskqueue        *xpt_taskq;
 141 };
 142
 143 typedef enum {
 144         DM_RET_COPY             = 0x01,
 145         DM_RET_FLAG_MASK        = 0x0f,
 146         DM_RET_NONE             = 0x00,
 147         DM_RET_STOP             = 0x10,
 148         DM_RET_DESCEND          = 0x20,
 149         DM_RET_ERROR            = 0x30,
 150         DM_RET_ACTION_MASK      = 0xf0
 151 } dev_match_ret;
 152
 153 typedef enum {
 154         XPT_DEPTH_BUS,
 155         XPT_DEPTH_TARGET,
 156         XPT_DEPTH_DEVICE,
 157         XPT_DEPTH_PERIPH
 158 } xpt_traverse_depth;
 159
 160 struct xpt_traverse_config {
 161         xpt_traverse_depth      depth;
 162         void                    *tr_func;
 163         void                    *tr_arg;
 164 };
 165
 166 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 167 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 168 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 169 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 170 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 171
 172 /* Transport layer configuration information */
 173 static struct xpt_softc xsoftc;
 174
 175 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
 176
 177 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
 178            &xsoftc.boot_delay, 0, "Bus registration wait time");
 179 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
 180             &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
 181 SYSCTL_INT(_kern_cam, OID_AUTO, announce_nosbuf, CTLFLAG_RWTUN,
 182             &xsoftc.announce_nosbuf, 0, "Don't use sbuf for announcements");
 183
 184 struct cam_doneq {
 185         struct mtx_padalign     cam_doneq_mtx;
 186         STAILQ_HEAD(, ccb_hdr)  cam_doneq;
 187         int                     cam_doneq_sleep;
 188 };
 189
 190 static struct cam_doneq cam_doneqs[MAXCPU];
 191 static int cam_num_doneqs;
 192 static struct proc *cam_proc;
 193
 194 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
 195            &cam_num_doneqs, 0, "Number of completion queues/threads");
 196
 197 struct cam_periph *xpt_periph;
 198
 199 static periph_init_t xpt_periph_init;
 200
 201 static struct periph_driver xpt_driver =
 202 {
 203         xpt_periph_init, "xpt",
 204         TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
 205         CAM_PERIPH_DRV_EARLY
 206 };
 207
 208 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 209
 210 static d_open_t xptopen;
 211 static d_close_t xptclose;
 212 static d_ioctl_t xptioctl;
 213 static d_ioctl_t xptdoioctl;
 214
 215 static struct cdevsw xpt_cdevsw = {
 216         .d_version =    D_VERSION,
 217         .d_flags =      0,
 218         .d_open =       xptopen,
 219         .d_close =      xptclose,
 220         .d_ioctl =      xptioctl,
 221         .d_name =       "xpt",
 222 };
 223
 224 /* Storage for debugging datastructures */
 225 struct cam_path *cam_dpath;
 226 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
 227 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN,
 228         &cam_dflags, 0, "Enabled debug flags");
 229 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
 230 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN,
 231         &cam_debug_delay, 0, "Delay in us after each debug message");
 232
 233 /* Our boot-time initialization hook */
 234 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 235
 236 static moduledata_t cam_moduledata = {
 237         "cam",
 238         cam_module_event_handler,
 239         NULL
 240 };
 241
 242 static int      xpt_init(void *);
 243
 244 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 245 MODULE_VERSION(cam, 1);
 246
 247
 248 static void             xpt_async_bcast(struct async_list *async_head,
 249                                         u_int32_t async_code,
 250                                         struct cam_path *path,
 251                                         void *async_arg);
 252 static path_id_t xptnextfreepathid(void);
 253 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 254 static union ccb *xpt_get_ccb(struct cam_periph *periph);
 255 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
 256 static void      xpt_run_allocq(struct cam_periph *periph, int sleep);
 257 static void      xpt_run_allocq_task(void *context, int pending);
 258 static void      xpt_run_devq(struct cam_devq *devq);
 259 static timeout_t xpt_release_devq_timeout;
 260 static void      xpt_release_simq_timeout(void *arg) __unused;
 261 static void      xpt_acquire_bus(struct cam_eb *bus);
 262 static void      xpt_release_bus(struct cam_eb *bus);
 263 static uint32_t  xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
 264 static int       xpt_release_devq_device(struct cam_ed *dev, u_int count,
 265                     int run_queue);
 266 static struct cam_et*
 267                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 268 static void      xpt_acquire_target(struct cam_et *target);
 269 static void      xpt_release_target(struct cam_et *target);
 270 static struct cam_eb*
 271                  xpt_find_bus(path_id_t path_id);
 272 static struct cam_et*
 273                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 274 static struct cam_ed*
 275                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 276 static void      xpt_config(void *arg);
 277 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 278                                  u_int32_t new_priority);
 279 static xpt_devicefunc_t xptpassannouncefunc;
 280 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 281 static void      xptpoll(struct cam_sim *sim);
 282 static void      camisr_runqueue(void);
 283 static void      xpt_done_process(struct ccb_hdr *ccb_h);
 284 static void      xpt_done_td(void *);
 285 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 286                                     u_int num_patterns, struct cam_eb *bus);
 287 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 288                                        u_int num_patterns,
 289                                        struct cam_ed *device);
 290 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 291                                        u_int num_patterns,
 292                                        struct cam_periph *periph);
 293 static xpt_busfunc_t    xptedtbusfunc;
 294 static xpt_targetfunc_t xptedttargetfunc;
 295 static xpt_devicefunc_t xptedtdevicefunc;
 296 static xpt_periphfunc_t xptedtperiphfunc;
 297 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 298 static xpt_periphfunc_t xptplistperiphfunc;
 299 static int              xptedtmatch(struct ccb_dev_match *cdm);
 300 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 301 static int              xptbustraverse(struct cam_eb *start_bus,
 302                                        xpt_busfunc_t *tr_func, void *arg);
 303 static int              xpttargettraverse(struct cam_eb *bus,
 304                                           struct cam_et *start_target,
 305                                           xpt_targetfunc_t *tr_func, void *arg);
 306 static int              xptdevicetraverse(struct cam_et *target,
 307                                           struct cam_ed *start_device,
 308                                           xpt_devicefunc_t *tr_func, void *arg);
 309 static int              xptperiphtraverse(struct cam_ed *device,
 310                                           struct cam_periph *start_periph,
 311                                           xpt_periphfunc_t *tr_func, void *arg);
 312 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 313                                         xpt_pdrvfunc_t *tr_func, void *arg);
 314 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 315                                             struct cam_periph *start_periph,
 316                                             xpt_periphfunc_t *tr_func,
 317                                             void *arg);
 318 static xpt_busfunc_t    xptdefbusfunc;
 319 static xpt_targetfunc_t xptdeftargetfunc;
 320 static xpt_devicefunc_t xptdefdevicefunc;
 321 static xpt_periphfunc_t xptdefperiphfunc;
 322 static void             xpt_finishconfig_task(void *context, int pending);
 323 static void             xpt_dev_async_default(u_int32_t async_code,
 324                                               struct cam_eb *bus,
 325                                               struct cam_et *target,
 326                                               struct cam_ed *device,
 327                                               void *async_arg);
 328 static struct cam_ed *  xpt_alloc_device_default(struct cam_eb *bus,
 329                                                  struct cam_et *target,
 330                                                  lun_id_t lun_id);
 331 static xpt_devicefunc_t xptsetasyncfunc;
 332 static xpt_busfunc_t    xptsetasyncbusfunc;
 333 static cam_status       xptregister(struct cam_periph *periph,
 334                                     void *arg);
 335 static __inline int device_is_queued(struct cam_ed *device);
 336
 337 static __inline int
 338 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 339 {
 340         int     retval;
 341
 342         mtx_assert(&devq->send_mtx, MA_OWNED);
 343         if ((dev->ccbq.queue.entries > 0) &&
 344             (dev->ccbq.dev_openings > 0) &&
 345             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 346                 /*
 347                  * The priority of a device waiting for controller
 348                  * resources is that of the highest priority CCB
 349                  * enqueued.
 350                  */
 351                 retval =
 352                     xpt_schedule_dev(&devq->send_queue,
 353                                      &dev->devq_entry,
 354                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 355         } else {
 356                 retval = 0;
 357         }
 358         return (retval);
 359 }
 360
 361 static __inline int
 362 device_is_queued(struct cam_ed *device)
 363 {
 364         return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
 365 }
 366
 367 static void
 368 xpt_periph_init()
 369 {
 370         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 371 }
 372
 373 static int
 374 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 375 {
 376
 377         /*
 378          * Only allow read-write access.
 379          */
 380         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 381                 return(EPERM);
 382
 383         /*
 384          * We don't allow nonblocking access.
 385          */
 386         if ((flags & O_NONBLOCK) != 0) {
 387                 printf("%s: can't do nonblocking access\n", devtoname(dev));
 388                 return(ENODEV);
 389         }
 390
 391         return(0);
 392 }
 393
 394 static int
 395 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 396 {
 397
 398         return(0);
 399 }
 400
 401 /*
 402  * Don't automatically grab the xpt softc lock here even though this is going
 403  * through the xpt device.  The xpt device is really just a back door for
 404  * accessing other devices and SIMs, so the right thing to do is to grab
 405  * the appropriate SIM lock once the bus/SIM is located.
 406  */
 407 static int
 408 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 409 {
 410         int error;
 411
 412         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 413                 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
 414         }
 415         return (error);
 416 }
 417
 418 static int
 419 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 420 {
 421         int error;
 422
 423         error = 0;
 424
 425         switch(cmd) {
 426         /*
 427          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 428          * to accept CCB types that don't quite make sense to send through a
 429          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 430          * in the CAM spec.
 431          */
 432         case CAMIOCOMMAND: {
 433                 union ccb *ccb;
 434                 union ccb *inccb;
 435                 struct cam_eb *bus;
 436
 437                 inccb = (union ccb *)addr;
 438 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 439                 if (inccb->ccb_h.func_code == XPT_SCSI_IO)
 440                         inccb->csio.bio = NULL;
 441 #endif
 442
 443                 if (inccb->ccb_h.flags & CAM_UNLOCKED)
 444                         return (EINVAL);
 445
 446                 bus = xpt_find_bus(inccb->ccb_h.path_id);
 447                 if (bus == NULL)
 448                         return (EINVAL);
 449
 450                 switch (inccb->ccb_h.func_code) {
 451                 case XPT_SCAN_BUS:
 452                 case XPT_RESET_BUS:
 453                         if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
 454                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 455                                 xpt_release_bus(bus);
 456                                 return (EINVAL);
 457                         }
 458                         break;
 459                 case XPT_SCAN_TGT:
 460                         if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
 461                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 462                                 xpt_release_bus(bus);
 463                                 return (EINVAL);
 464                         }
 465                         break;
 466                 default:
 467                         break;
 468                 }
 469
 470                 switch(inccb->ccb_h.func_code) {
 471                 case XPT_SCAN_BUS:
 472                 case XPT_RESET_BUS:
 473                 case XPT_PATH_INQ:
 474                 case XPT_ENG_INQ:
 475                 case XPT_SCAN_LUN:
 476                 case XPT_SCAN_TGT:
 477
 478                         ccb = xpt_alloc_ccb();
 479
 480                         /*
 481                          * Create a path using the bus, target, and lun the
 482                          * user passed in.
 483                          */
 484                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 485                                             inccb->ccb_h.path_id,
 486                                             inccb->ccb_h.target_id,
 487                                             inccb->ccb_h.target_lun) !=
 488                                             CAM_REQ_CMP){
 489                                 error = EINVAL;
 490                                 xpt_free_ccb(ccb);
 491                                 break;
 492                         }
 493                         /* Ensure all of our fields are correct */
 494                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 495                                       inccb->ccb_h.pinfo.priority);
 496                         xpt_merge_ccb(ccb, inccb);
 497                         xpt_path_lock(ccb->ccb_h.path);
 498                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 499                         xpt_path_unlock(ccb->ccb_h.path);
 500                         bcopy(ccb, inccb, sizeof(union ccb));
 501                         xpt_free_path(ccb->ccb_h.path);
 502                         xpt_free_ccb(ccb);
 503                         break;
 504
 505                 case XPT_DEBUG: {
 506                         union ccb ccb;
 507
 508                         /*
 509                          * This is an immediate CCB, so it's okay to
 510                          * allocate it on the stack.
 511                          */
 512
 513                         /*
 514                          * Create a path using the bus, target, and lun the
 515                          * user passed in.
 516                          */
 517                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 518                                             inccb->ccb_h.path_id,
 519                                             inccb->ccb_h.target_id,
 520                                             inccb->ccb_h.target_lun) !=
 521                                             CAM_REQ_CMP){
 522                                 error = EINVAL;
 523                                 break;
 524                         }
 525                         /* Ensure all of our fields are correct */
 526                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 527                                       inccb->ccb_h.pinfo.priority);
 528                         xpt_merge_ccb(&ccb, inccb);
 529                         xpt_action(&ccb);
 530                         bcopy(&ccb, inccb, sizeof(union ccb));
 531                         xpt_free_path(ccb.ccb_h.path);
 532                         break;
 533
 534                 }
 535                 case XPT_DEV_MATCH: {
 536                         struct cam_periph_map_info mapinfo;
 537                         struct cam_path *old_path;
 538
 539                         /*
 540                          * We can't deal with physical addresses for this
 541                          * type of transaction.
 542                          */
 543                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 544                             CAM_DATA_VADDR) {
 545                                 error = EINVAL;
 546                                 break;
 547                         }
 548
 549                         /*
 550                          * Save this in case the caller had it set to
 551                          * something in particular.
 552                          */
 553                         old_path = inccb->ccb_h.path;
 554
 555                         /*
 556                          * We really don't need a path for the matching
 557                          * code.  The path is needed because of the
 558                          * debugging statements in xpt_action().  They
 559                          * assume that the CCB has a valid path.
 560                          */
 561                         inccb->ccb_h.path = xpt_periph->path;
 562
 563                         bzero(&mapinfo, sizeof(mapinfo));
 564
 565                         /*
 566                          * Map the pattern and match buffers into kernel
 567                          * virtual address space.
 568                          */
 569                         error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS);
 570
 571                         if (error) {
 572                                 inccb->ccb_h.path = old_path;
 573                                 break;
 574                         }
 575
 576                         /*
 577                          * This is an immediate CCB, we can send it on directly.
 578                          */
 579                         xpt_action(inccb);
 580
 581                         /*
 582                          * Map the buffers back into user space.
 583                          */
 584                         cam_periph_unmapmem(inccb, &mapinfo);
 585
 586                         inccb->ccb_h.path = old_path;
 587
 588                         error = 0;
 589                         break;
 590                 }
 591                 default:
 592                         error = ENOTSUP;
 593                         break;
 594                 }
 595                 xpt_release_bus(bus);
 596                 break;
 597         }
 598         /*
 599          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 600          * with the periphal driver name and unit name filled in.  The other
 601          * fields don't really matter as input.  The passthrough driver name
 602          * ("pass"), and unit number are passed back in the ccb.  The current
 603          * device generation number, and the index into the device peripheral
 604          * driver list, and the status are also passed back.  Note that
 605          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 606          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 607          * (or rather should be) impossible for the device peripheral driver
 608          * list to change since we look at the whole thing in one pass, and
 609          * we do it with lock protection.
 610          *
 611          */
 612         case CAMGETPASSTHRU: {
 613                 union ccb *ccb;
 614                 struct cam_periph *periph;
 615                 struct periph_driver **p_drv;
 616                 char   *name;
 617                 u_int unit;
 618                 int base_periph_found;
 619
 620                 ccb = (union ccb *)addr;
 621                 unit = ccb->cgdl.unit_number;
 622                 name = ccb->cgdl.periph_name;
 623                 base_periph_found = 0;
 624 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 625                 if (ccb->ccb_h.func_code == XPT_SCSI_IO)
 626                         ccb->csio.bio = NULL;
 627 #endif
 628
 629                 /*
 630                  * Sanity check -- make sure we don't get a null peripheral
 631                  * driver name.
 632                  */
 633                 if (*ccb->cgdl.periph_name == '\0') {
 634                         error = EINVAL;
 635                         break;
 636                 }
 637
 638                 /* Keep the list from changing while we traverse it */
 639                 xpt_lock_buses();
 640
 641                 /* first find our driver in the list of drivers */
 642                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 643                         if (strcmp((*p_drv)->driver_name, name) == 0)
 644                                 break;
 645
 646                 if (*p_drv == NULL) {
 647                         xpt_unlock_buses();
 648                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 649                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 650                         *ccb->cgdl.periph_name = '\0';
 651                         ccb->cgdl.unit_number = 0;
 652                         error = ENOENT;
 653                         break;
 654                 }
 655
 656                 /*
 657                  * Run through every peripheral instance of this driver
 658                  * and check to see whether it matches the unit passed
 659                  * in by the user.  If it does, get out of the loops and
 660                  * find the passthrough driver associated with that
 661                  * peripheral driver.
 662                  */
 663                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 664                      periph = TAILQ_NEXT(periph, unit_links)) {
 665
 666                         if (periph->unit_number == unit)
 667                                 break;
 668                 }
 669                 /*
 670                  * If we found the peripheral driver that the user passed
 671                  * in, go through all of the peripheral drivers for that
 672                  * particular device and look for a passthrough driver.
 673                  */
 674                 if (periph != NULL) {
 675                         struct cam_ed *device;
 676                         int i;
 677
 678                         base_periph_found = 1;
 679                         device = periph->path->device;
 680                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 681                              periph != NULL;
 682                              periph = SLIST_NEXT(periph, periph_links), i++) {
 683                                 /*
 684                                  * Check to see whether we have a
 685                                  * passthrough device or not.
 686                                  */
 687                                 if (strcmp(periph->periph_name, "pass") == 0) {
 688                                         /*
 689                                          * Fill in the getdevlist fields.
 690                                          */
 691                                         strlcpy(ccb->cgdl.periph_name,
 692                                                periph->periph_name,
 693                                                sizeof(ccb->cgdl.periph_name));
 694                                         ccb->cgdl.unit_number =
 695                                                 periph->unit_number;
 696                                         if (SLIST_NEXT(periph, periph_links))
 697                                                 ccb->cgdl.status =
 698                                                         CAM_GDEVLIST_MORE_DEVS;
 699                                         else
 700                                                 ccb->cgdl.status =
 701                                                        CAM_GDEVLIST_LAST_DEVICE;
 702                                         ccb->cgdl.generation =
 703                                                 device->generation;
 704                                         ccb->cgdl.index = i;
 705                                         /*
 706                                          * Fill in some CCB header fields
 707                                          * that the user may want.
 708                                          */
 709                                         ccb->ccb_h.path_id =
 710                                                 periph->path->bus->path_id;
 711                                         ccb->ccb_h.target_id =
 712                                                 periph->path->target->target_id;
 713                                         ccb->ccb_h.target_lun =
 714                                                 periph->path->device->lun_id;
 715                                         ccb->ccb_h.status = CAM_REQ_CMP;
 716                                         break;
 717                                 }
 718                         }
 719                 }
 720
 721                 /*
 722                  * If the periph is null here, one of two things has
 723                  * happened.  The first possibility is that we couldn't
 724                  * find the unit number of the particular peripheral driver
 725                  * that the user is asking about.  e.g. the user asks for
 726                  * the passthrough driver for "da11".  We find the list of
 727                  * "da" peripherals all right, but there is no unit 11.
 728                  * The other possibility is that we went through the list
 729                  * of peripheral drivers attached to the device structure,
 730                  * but didn't find one with the name "pass".  Either way,
 731                  * we return ENOENT, since we couldn't find something.
 732                  */
 733                 if (periph == NULL) {
 734                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 735                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 736                         *ccb->cgdl.periph_name = '\0';
 737                         ccb->cgdl.unit_number = 0;
 738                         error = ENOENT;
 739                         /*
 740                          * It is unfortunate that this is even necessary,
 741                          * but there are many, many clueless users out there.
 742                          * If this is true, the user is looking for the
 743                          * passthrough driver, but doesn't have one in his
 744                          * kernel.
 745                          */
 746                         if (base_periph_found == 1) {
 747                                 printf("xptioctl: pass driver is not in the "
 748                                        "kernel\n");
 749                                 printf("xptioctl: put \"device pass\" in "
 750                                        "your kernel config file\n");
 751                         }
 752                 }
 753                 xpt_unlock_buses();
 754                 break;
 755                 }
 756         default:
 757                 error = ENOTTY;
 758                 break;
 759         }
 760
 761         return(error);
 762 }
 763
 764 static int
 765 cam_module_event_handler(module_t mod, int what, void *arg)
 766 {
 767         int error;
 768
 769         switch (what) {
 770         case MOD_LOAD:
 771                 if ((error = xpt_init(NULL)) != 0)
 772                         return (error);
 773                 break;
 774         case MOD_UNLOAD:
 775                 return EBUSY;
 776         default:
 777                 return EOPNOTSUPP;
 778         }
 779
 780         return 0;
 781 }
 782
 783 static struct xpt_proto *
 784 xpt_proto_find(cam_proto proto)
 785 {
 786         struct xpt_proto **pp;
 787
 788         SET_FOREACH(pp, cam_xpt_proto_set) {
 789                 if ((*pp)->proto == proto)
 790                         return *pp;
 791         }
 792
 793         return NULL;
 794 }
 795
 796 static void
 797 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 798 {
 799
 800         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 801                 xpt_free_path(done_ccb->ccb_h.path);
 802                 xpt_free_ccb(done_ccb);
 803         } else {
 804                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 805                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 806         }
 807         xpt_release_boot();
 808 }
 809
 810 /* thread to handle bus rescans */
 811 static void
 812 xpt_scanner_thread(void *dummy)
 813 {
 814         union ccb       *ccb;
 815         struct cam_path  path;
 816
 817         xpt_lock_buses();
 818         for (;;) {
 819                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 820                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 821                                "-", 0);
 822                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 823                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 824                         xpt_unlock_buses();
 825
 826                         /*
 827                          * Since lock can be dropped inside and path freed
 828                          * by completion callback even before return here,
 829                          * take our own path copy for reference.
 830                          */
 831                         xpt_copy_path(&path, ccb->ccb_h.path);
 832                         xpt_path_lock(&path);
 833                         xpt_action(ccb);
 834                         xpt_path_unlock(&path);
 835                         xpt_release_path(&path);
 836
 837                         xpt_lock_buses();
 838                 }
 839         }
 840 }
 841
 842 void
 843 xpt_rescan(union ccb *ccb)
 844 {
 845         struct ccb_hdr *hdr;
 846
 847         /* Prepare request */
 848         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_BUS;
 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_TGT;
 854         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 855             ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
 856                 ccb->ccb_h.func_code = XPT_SCAN_LUN;
 857         else {
 858                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 859                 xpt_free_path(ccb->ccb_h.path);
 860                 xpt_free_ccb(ccb);
 861                 return;
 862         }
 863         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
 864             ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code,
 865                 xpt_action_name(ccb->ccb_h.func_code)));
 866
 867         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 868         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 869         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 870         /* Don't make duplicate entries for the same paths. */
 871         xpt_lock_buses();
 872         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 873                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 874                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 875                                 wakeup(&xsoftc.ccb_scanq);
 876                                 xpt_unlock_buses();
 877                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 878                                 xpt_free_path(ccb->ccb_h.path);
 879                                 xpt_free_ccb(ccb);
 880                                 return;
 881                         }
 882                 }
 883         }
 884         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 885         xsoftc.buses_to_config++;
 886         wakeup(&xsoftc.ccb_scanq);
 887         xpt_unlock_buses();
 888 }
 889
 890 /* Functions accessed by the peripheral drivers */
 891 static int
 892 xpt_init(void *dummy)
 893 {
 894         struct cam_sim *xpt_sim;
 895         struct cam_path *path;
 896         struct cam_devq *devq;
 897         cam_status status;
 898         int error, i;
 899
 900         TAILQ_INIT(&xsoftc.xpt_busses);
 901         TAILQ_INIT(&xsoftc.ccb_scanq);
 902         STAILQ_INIT(&xsoftc.highpowerq);
 903         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 904
 905         mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
 906         mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
 907         xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
 908             taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
 909
 910 #ifdef CAM_BOOT_DELAY
 911         /*
 912          * Override this value at compile time to assist our users
 913          * who don't use loader to boot a kernel.
 914          */
 915         xsoftc.boot_delay = CAM_BOOT_DELAY;
 916 #endif
 917         /*
 918          * The xpt layer is, itself, the equivalent of a SIM.
 919          * Allow 16 ccbs in the ccb pool for it.  This should
 920          * give decent parallelism when we probe buses and
 921          * perform other XPT functions.
 922          */
 923         devq = cam_simq_alloc(16);
 924         xpt_sim = cam_sim_alloc(xptaction,
 925                                 xptpoll,
 926                                 "xpt",
 927                                 /*softc*/NULL,
 928                                 /*unit*/0,
 929                                 /*mtx*/&xsoftc.xpt_lock,
 930                                 /*max_dev_transactions*/0,
 931                                 /*max_tagged_dev_transactions*/0,
 932                                 devq);
 933         if (xpt_sim == NULL)
 934                 return (ENOMEM);
 935
 936         mtx_lock(&xsoftc.xpt_lock);
 937         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 938                 mtx_unlock(&xsoftc.xpt_lock);
 939                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 940                        " failing attach\n", status);
 941                 return (EINVAL);
 942         }
 943         mtx_unlock(&xsoftc.xpt_lock);
 944
 945         /*
 946          * Looking at the XPT from the SIM layer, the XPT is
 947          * the equivalent of a peripheral driver.  Allocate
 948          * a peripheral driver entry for us.
 949          */
 950         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 951                                       CAM_TARGET_WILDCARD,
 952                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 953                 printf("xpt_init: xpt_create_path failed with status %#x,"
 954                        " failing attach\n", status);
 955                 return (EINVAL);
 956         }
 957         xpt_path_lock(path);
 958         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 959                          path, NULL, 0, xpt_sim);
 960         xpt_path_unlock(path);
 961         xpt_free_path(path);
 962
 963         if (cam_num_doneqs < 1)
 964                 cam_num_doneqs = 1 + mp_ncpus / 6;
 965         else if (cam_num_doneqs > MAXCPU)
 966                 cam_num_doneqs = MAXCPU;
 967         for (i = 0; i < cam_num_doneqs; i++) {
 968                 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 969                     MTX_DEF);
 970                 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
 971                 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 972                     &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 973                 if (error != 0) {
 974                         cam_num_doneqs = i;
 975                         break;
 976                 }
 977         }
 978         if (cam_num_doneqs < 1) {
 979                 printf("xpt_init: Cannot init completion queues "
 980                        "- failing attach\n");
 981                 return (ENOMEM);
 982         }
 983         /*
 984          * Register a callback for when interrupts are enabled.
 985          */
 986         xsoftc.xpt_config_hook =
 987             (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
 988                                               M_CAMXPT, M_NOWAIT | M_ZERO);
 989         if (xsoftc.xpt_config_hook == NULL) {
 990                 printf("xpt_init: Cannot malloc config hook "
 991                        "- failing attach\n");
 992                 return (ENOMEM);
 993         }
 994         xsoftc.xpt_config_hook->ich_func = xpt_config;
 995         if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
 996                 free (xsoftc.xpt_config_hook, M_CAMXPT);
 997                 printf("xpt_init: config_intrhook_establish failed "
 998                        "- failing attach\n");
 999         }
1000
1001         return (0);
1002 }
1003
1004 static cam_status
1005 xptregister(struct cam_periph *periph, void *arg)
1006 {
1007         struct cam_sim *xpt_sim;
1008
1009         if (periph == NULL) {
1010                 printf("xptregister: periph was NULL!!\n");
1011                 return(CAM_REQ_CMP_ERR);
1012         }
1013
1014         xpt_sim = (struct cam_sim *)arg;
1015         xpt_sim->softc = periph;
1016         xpt_periph = periph;
1017         periph->softc = NULL;
1018
1019         return(CAM_REQ_CMP);
1020 }
1021
1022 int32_t
1023 xpt_add_periph(struct cam_periph *periph)
1024 {
1025         struct cam_ed *device;
1026         int32_t  status;
1027
1028         TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
1029         device = periph->path->device;
1030         status = CAM_REQ_CMP;
1031         if (device != NULL) {
1032                 mtx_lock(&device->target->bus->eb_mtx);
1033                 device->generation++;
1034                 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
1035                 mtx_unlock(&device->target->bus->eb_mtx);
1036                 atomic_add_32(&xsoftc.xpt_generation, 1);
1037         }
1038
1039         return (status);
1040 }
1041
1042 void
1043 xpt_remove_periph(struct cam_periph *periph)
1044 {
1045         struct cam_ed *device;
1046
1047         device = periph->path->device;
1048         if (device != NULL) {
1049                 mtx_lock(&device->target->bus->eb_mtx);
1050                 device->generation++;
1051                 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1052                 mtx_unlock(&device->target->bus->eb_mtx);
1053                 atomic_add_32(&xsoftc.xpt_generation, 1);
1054         }
1055 }
1056
1057
1058 void
1059 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1060 {
1061         struct  cam_path *path = periph->path;
1062         struct  xpt_proto *proto;
1063
1064         cam_periph_assert(periph, MA_OWNED);
1065         periph->flags |= CAM_PERIPH_ANNOUNCED;
1066
1067         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1068                periph->periph_name, periph->unit_number,
1069                path->bus->sim->sim_name,
1070                path->bus->sim->unit_number,
1071                path->bus->sim->bus_id,
1072                path->bus->path_id,
1073                path->target->target_id,
1074                (uintmax_t)path->device->lun_id);
1075         printf("%s%d: ", periph->periph_name, periph->unit_number);
1076         proto = xpt_proto_find(path->device->protocol);
1077         if (proto)
1078                 proto->ops->announce(path->device);
1079         else
1080                 printf("%s%d: Unknown protocol device %d\n",
1081                     periph->periph_name, periph->unit_number,
1082                     path->device->protocol);
1083         if (path->device->serial_num_len > 0) {
1084                 /* Don't wrap the screen  - print only the first 60 chars */
1085                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1086                        periph->unit_number, path->device->serial_num);
1087         }
1088         /* Announce transport details. */
1089         path->bus->xport->ops->announce(periph);
1090         /* Announce command queueing. */
1091         if (path->device->inq_flags & SID_CmdQue
1092          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1093                 printf("%s%d: Command Queueing enabled\n",
1094                        periph->periph_name, periph->unit_number);
1095         }
1096         /* Announce caller's details if they've passed in. */
1097         if (announce_string != NULL)
1098                 printf("%s%d: %s\n", periph->periph_name,
1099                        periph->unit_number, announce_string);
1100 }
1101
1102 void
1103 xpt_announce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb,
1104     char *announce_string)
1105 {
1106         struct  cam_path *path = periph->path;
1107         struct  xpt_proto *proto;
1108
1109         cam_periph_assert(periph, MA_OWNED);
1110         periph->flags |= CAM_PERIPH_ANNOUNCED;
1111
1112         /* Fall back to the non-sbuf method if necessary */
1113         if (xsoftc.announce_nosbuf != 0) {
1114                 xpt_announce_periph(periph, announce_string);
1115                 return;
1116         }
1117         proto = xpt_proto_find(path->device->protocol);
1118         if (((proto != NULL) && (proto->ops->announce_sbuf == NULL)) ||
1119             (path->bus->xport->ops->announce_sbuf == NULL)) {
1120                 xpt_announce_periph(periph, announce_string);
1121                 return;
1122         }
1123
1124         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1125             periph->periph_name, periph->unit_number,
1126             path->bus->sim->sim_name,
1127             path->bus->sim->unit_number,
1128             path->bus->sim->bus_id,
1129             path->bus->path_id,
1130             path->target->target_id,
1131             (uintmax_t)path->device->lun_id);
1132         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1133
1134         if (proto)
1135                 proto->ops->announce_sbuf(path->device, sb);
1136         else
1137                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1138                     periph->periph_name, periph->unit_number,
1139                     path->device->protocol);
1140         if (path->device->serial_num_len > 0) {
1141                 /* Don't wrap the screen  - print only the first 60 chars */
1142                 sbuf_printf(sb, "%s%d: Serial Number %.60s\n",
1143                     periph->periph_name, periph->unit_number,
1144                     path->device->serial_num);
1145         }
1146         /* Announce transport details. */
1147         path->bus->xport->ops->announce_sbuf(periph, sb);
1148         /* Announce command queueing. */
1149         if (path->device->inq_flags & SID_CmdQue
1150          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1151                 sbuf_printf(sb, "%s%d: Command Queueing enabled\n",
1152                     periph->periph_name, periph->unit_number);
1153         }
1154         /* Announce caller's details if they've passed in. */
1155         if (announce_string != NULL)
1156                 sbuf_printf(sb, "%s%d: %s\n", periph->periph_name,
1157                     periph->unit_number, announce_string);
1158 }
1159
1160 void
1161 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1162 {
1163         if (quirks != 0) {
1164                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1165                     periph->unit_number, quirks, bit_string);
1166         }
1167 }
1168
1169 void
1170 xpt_announce_quirks_sbuf(struct cam_periph *periph, struct sbuf *sb,
1171                          int quirks, char *bit_string)
1172 {
1173         if (xsoftc.announce_nosbuf != 0) {
1174                 xpt_announce_quirks(periph, quirks, bit_string);
1175                 return;
1176         }
1177
1178         if (quirks != 0) {
1179                 sbuf_printf(sb, "%s%d: quirks=0x%b\n", periph->periph_name,
1180                     periph->unit_number, quirks, bit_string);
1181         }
1182 }
1183
1184 void
1185 xpt_denounce_periph(struct cam_periph *periph)
1186 {
1187         struct  cam_path *path = periph->path;
1188         struct  xpt_proto *proto;
1189
1190         cam_periph_assert(periph, MA_OWNED);
1191         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1192                periph->periph_name, periph->unit_number,
1193                path->bus->sim->sim_name,
1194                path->bus->sim->unit_number,
1195                path->bus->sim->bus_id,
1196                path->bus->path_id,
1197                path->target->target_id,
1198                (uintmax_t)path->device->lun_id);
1199         printf("%s%d: ", periph->periph_name, periph->unit_number);
1200         proto = xpt_proto_find(path->device->protocol);
1201         if (proto)
1202                 proto->ops->denounce(path->device);
1203         else
1204                 printf("%s%d: Unknown protocol device %d\n",
1205                     periph->periph_name, periph->unit_number,
1206                     path->device->protocol);
1207         if (path->device->serial_num_len > 0)
1208                 printf(" s/n %.60s", path->device->serial_num);
1209         printf(" detached\n");
1210 }
1211
1212 void
1213 xpt_denounce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb)
1214 {
1215         struct cam_path *path = periph->path;
1216         struct xpt_proto *proto;
1217
1218         cam_periph_assert(periph, MA_OWNED);
1219
1220         /* Fall back to the non-sbuf method if necessary */
1221         if (xsoftc.announce_nosbuf != 0) {
1222                 xpt_denounce_periph(periph);
1223                 return;
1224         }
1225         proto = xpt_proto_find(path->device->protocol);
1226         if ((proto != NULL) && (proto->ops->denounce_sbuf == NULL)) {
1227                 xpt_denounce_periph(periph);
1228                 return;
1229         }
1230
1231         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1232             periph->periph_name, periph->unit_number,
1233             path->bus->sim->sim_name,
1234             path->bus->sim->unit_number,
1235             path->bus->sim->bus_id,
1236             path->bus->path_id,
1237             path->target->target_id,
1238             (uintmax_t)path->device->lun_id);
1239         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1240
1241         if (proto)
1242                 proto->ops->denounce_sbuf(path->device, sb);
1243         else
1244                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1245                     periph->periph_name, periph->unit_number,
1246                     path->device->protocol);
1247         if (path->device->serial_num_len > 0)
1248                 sbuf_printf(sb, " s/n %.60s", path->device->serial_num);
1249         sbuf_printf(sb, " detached\n");
1250 }
1251
1252 int
1253 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1254 {
1255         int ret = -1, l, o;
1256         struct ccb_dev_advinfo cdai;
1257         struct scsi_vpd_id_descriptor *idd;
1258
1259         xpt_path_assert(path, MA_OWNED);
1260
1261         memset(&cdai, 0, sizeof(cdai));
1262         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1263         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1264         cdai.flags = CDAI_FLAG_NONE;
1265         cdai.bufsiz = len;
1266
1267         if (!strcmp(attr, "GEOM::ident"))
1268                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1269         else if (!strcmp(attr, "GEOM::physpath"))
1270                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1271         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1272                  strcmp(attr, "GEOM::lunname") == 0) {
1273                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1274                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1275         } else
1276                 goto out;
1277
1278         cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1279         if (cdai.buf == NULL) {
1280                 ret = ENOMEM;
1281                 goto out;
1282         }
1283         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1284         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1285                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1286         if (cdai.provsiz == 0)
1287                 goto out;
1288         if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1289                 if (strcmp(attr, "GEOM::lunid") == 0) {
1290                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1291                             cdai.provsiz, scsi_devid_is_lun_naa);
1292                         if (idd == NULL)
1293                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1294                                     cdai.provsiz, scsi_devid_is_lun_eui64);
1295                         if (idd == NULL)
1296                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1297                                     cdai.provsiz, scsi_devid_is_lun_uuid);
1298                         if (idd == NULL)
1299                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1300                                     cdai.provsiz, scsi_devid_is_lun_md5);
1301                 } else
1302                         idd = NULL;
1303                 if (idd == NULL)
1304                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1305                             cdai.provsiz, scsi_devid_is_lun_t10);
1306                 if (idd == NULL)
1307                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1308                             cdai.provsiz, scsi_devid_is_lun_name);
1309                 if (idd == NULL)
1310                         goto out;
1311                 ret = 0;
1312                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) {
1313                         if (idd->length < len) {
1314                                 for (l = 0; l < idd->length; l++)
1315                                         buf[l] = idd->identifier[l] ?
1316                                             idd->identifier[l] : ' ';
1317                                 buf[l] = 0;
1318                         } else
1319                                 ret = EFAULT;
1320                 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1321                         l = strnlen(idd->identifier, idd->length);
1322                         if (l < len) {
1323                                 bcopy(idd->identifier, buf, l);
1324                                 buf[l] = 0;
1325                         } else
1326                                 ret = EFAULT;
1327                 } else if ((idd->id_type & SVPD_ID_TYPE_MASK) == SVPD_ID_TYPE_UUID
1328                     && idd->identifier[0] == 0x10) {
1329                         if ((idd->length - 2) * 2 + 4 < len) {
1330                                 for (l = 2, o = 0; l < idd->length; l++) {
1331                                         if (l == 6 || l == 8 || l == 10 || l == 12)
1332                                             o += sprintf(buf + o, "-");
1333                                         o += sprintf(buf + o, "%02x",
1334                                             idd->identifier[l]);
1335                                 }
1336                         } else
1337                                 ret = EFAULT;
1338                 } else {
1339                         if (idd->length * 2 < len) {
1340                                 for (l = 0; l < idd->length; l++)
1341                                         sprintf(buf + l * 2, "%02x",
1342                                             idd->identifier[l]);
1343                         } else
1344                                 ret = EFAULT;
1345                 }
1346         } else {
1347                 ret = 0;
1348                 if (strlcpy(buf, cdai.buf, len) >= len)
1349                         ret = EFAULT;
1350         }
1351
1352 out:
1353         if (cdai.buf != NULL)
1354                 free(cdai.buf, M_CAMXPT);
1355         return ret;
1356 }
1357
1358 static dev_match_ret
1359 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1360             struct cam_eb *bus)
1361 {
1362         dev_match_ret retval;
1363         u_int i;
1364
1365         retval = DM_RET_NONE;
1366
1367         /*
1368          * If we aren't given something to match against, that's an error.
1369          */
1370         if (bus == NULL)
1371                 return(DM_RET_ERROR);
1372
1373         /*
1374          * If there are no match entries, then this bus matches no
1375          * matter what.
1376          */
1377         if ((patterns == NULL) || (num_patterns == 0))
1378                 return(DM_RET_DESCEND | DM_RET_COPY);
1379
1380         for (i = 0; i < num_patterns; i++) {
1381                 struct bus_match_pattern *cur_pattern;
1382
1383                 /*
1384                  * If the pattern in question isn't for a bus node, we
1385                  * aren't interested.  However, we do indicate to the
1386                  * calling routine that we should continue descending the
1387                  * tree, since the user wants to match against lower-level
1388                  * EDT elements.
1389                  */
1390                 if (patterns[i].type != DEV_MATCH_BUS) {
1391                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1392                                 retval |= DM_RET_DESCEND;
1393                         continue;
1394                 }
1395
1396                 cur_pattern = &patterns[i].pattern.bus_pattern;
1397
1398                 /*
1399                  * If they want to match any bus node, we give them any
1400                  * device node.
1401                  */
1402                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1403                         /* set the copy flag */
1404                         retval |= DM_RET_COPY;
1405
1406                         /*
1407                          * If we've already decided on an action, go ahead
1408                          * and return.
1409                          */
1410                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1411                                 return(retval);
1412                 }
1413
1414                 /*
1415                  * Not sure why someone would do this...
1416                  */
1417                 if (cur_pattern->flags == BUS_MATCH_NONE)
1418                         continue;
1419
1420                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1421                  && (cur_pattern->path_id != bus->path_id))
1422                         continue;
1423
1424                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1425                  && (cur_pattern->bus_id != bus->sim->bus_id))
1426                         continue;
1427
1428                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1429                  && (cur_pattern->unit_number != bus->sim->unit_number))
1430                         continue;
1431
1432                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1433                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1434                              DEV_IDLEN) != 0))
1435                         continue;
1436
1437                 /*
1438                  * If we get to this point, the user definitely wants
1439                  * information on this bus.  So tell the caller to copy the
1440                  * data out.
1441                  */
1442                 retval |= DM_RET_COPY;
1443
1444                 /*
1445                  * If the return action has been set to descend, then we
1446                  * know that we've already seen a non-bus matching
1447                  * expression, therefore we need to further descend the tree.
1448                  * This won't change by continuing around the loop, so we
1449                  * go ahead and return.  If we haven't seen a non-bus
1450                  * matching expression, we keep going around the loop until
1451                  * we exhaust the matching expressions.  We'll set the stop
1452                  * flag once we fall out of the loop.
1453                  */
1454                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1455                         return(retval);
1456         }
1457
1458         /*
1459          * If the return action hasn't been set to descend yet, that means
1460          * we haven't seen anything other than bus matching patterns.  So
1461          * tell the caller to stop descending the tree -- the user doesn't
1462          * want to match against lower level tree elements.
1463          */
1464         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1465                 retval |= DM_RET_STOP;
1466
1467         return(retval);
1468 }
1469
1470 static dev_match_ret
1471 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1472                struct cam_ed *device)
1473 {
1474         dev_match_ret retval;
1475         u_int i;
1476
1477         retval = DM_RET_NONE;
1478
1479         /*
1480          * If we aren't given something to match against, that's an error.
1481          */
1482         if (device == NULL)
1483                 return(DM_RET_ERROR);
1484
1485         /*
1486          * If there are no match entries, then this device matches no
1487          * matter what.
1488          */
1489         if ((patterns == NULL) || (num_patterns == 0))
1490                 return(DM_RET_DESCEND | DM_RET_COPY);
1491
1492         for (i = 0; i < num_patterns; i++) {
1493                 struct device_match_pattern *cur_pattern;
1494                 struct scsi_vpd_device_id *device_id_page;
1495
1496                 /*
1497                  * If the pattern in question isn't for a device node, we
1498                  * aren't interested.
1499                  */
1500                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1501                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1502                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1503                                 retval |= DM_RET_DESCEND;
1504                         continue;
1505                 }
1506
1507                 cur_pattern = &patterns[i].pattern.device_pattern;
1508
1509                 /* Error out if mutually exclusive options are specified. */
1510                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1511                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1512                         return(DM_RET_ERROR);
1513
1514                 /*
1515                  * If they want to match any device node, we give them any
1516                  * device node.
1517                  */
1518                 if (cur_pattern->flags == DEV_MATCH_ANY)
1519                         goto copy_dev_node;
1520
1521                 /*
1522                  * Not sure why someone would do this...
1523                  */
1524                 if (cur_pattern->flags == DEV_MATCH_NONE)
1525                         continue;
1526
1527                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1528                  && (cur_pattern->path_id != device->target->bus->path_id))
1529                         continue;
1530
1531                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1532                  && (cur_pattern->target_id != device->target->target_id))
1533                         continue;
1534
1535                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1536                  && (cur_pattern->target_lun != device->lun_id))
1537                         continue;
1538
1539                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1540                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1541                                     (caddr_t)&cur_pattern->data.inq_pat,
1542                                     1, sizeof(cur_pattern->data.inq_pat),
1543                                     scsi_static_inquiry_match) == NULL))
1544                         continue;
1545
1546                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1547                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1548                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1549                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1550                                       device->device_id_len
1551                                     - SVPD_DEVICE_ID_HDR_LEN,
1552                                       cur_pattern->data.devid_pat.id,
1553                                       cur_pattern->data.devid_pat.id_len) != 0))
1554                         continue;
1555
1556 copy_dev_node:
1557                 /*
1558                  * If we get to this point, the user definitely wants
1559                  * information on this device.  So tell the caller to copy
1560                  * the data out.
1561                  */
1562                 retval |= DM_RET_COPY;
1563
1564                 /*
1565                  * If the return action has been set to descend, then we
1566                  * know that we've already seen a peripheral matching
1567                  * expression, therefore we need to further descend the tree.
1568                  * This won't change by continuing around the loop, so we
1569                  * go ahead and return.  If we haven't seen a peripheral
1570                  * matching expression, we keep going around the loop until
1571                  * we exhaust the matching expressions.  We'll set the stop
1572                  * flag once we fall out of the loop.
1573                  */
1574                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1575                         return(retval);
1576         }
1577
1578         /*
1579          * If the return action hasn't been set to descend yet, that means
1580          * we haven't seen any peripheral matching patterns.  So tell the
1581          * caller to stop descending the tree -- the user doesn't want to
1582          * match against lower level tree elements.
1583          */
1584         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1585                 retval |= DM_RET_STOP;
1586
1587         return(retval);
1588 }
1589
1590 /*
1591  * Match a single peripheral against any number of match patterns.
1592  */
1593 static dev_match_ret
1594 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1595                struct cam_periph *periph)
1596 {
1597         dev_match_ret retval;
1598         u_int i;
1599
1600         /*
1601          * If we aren't given something to match against, that's an error.
1602          */
1603         if (periph == NULL)
1604                 return(DM_RET_ERROR);
1605
1606         /*
1607          * If there are no match entries, then this peripheral matches no
1608          * matter what.
1609          */
1610         if ((patterns == NULL) || (num_patterns == 0))
1611                 return(DM_RET_STOP | DM_RET_COPY);
1612
1613         /*
1614          * There aren't any nodes below a peripheral node, so there's no
1615          * reason to descend the tree any further.
1616          */
1617         retval = DM_RET_STOP;
1618
1619         for (i = 0; i < num_patterns; i++) {
1620                 struct periph_match_pattern *cur_pattern;
1621
1622                 /*
1623                  * If the pattern in question isn't for a peripheral, we
1624                  * aren't interested.
1625                  */
1626                 if (patterns[i].type != DEV_MATCH_PERIPH)
1627                         continue;
1628
1629                 cur_pattern = &patterns[i].pattern.periph_pattern;
1630
1631                 /*
1632                  * If they want to match on anything, then we will do so.
1633                  */
1634                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1635                         /* set the copy flag */
1636                         retval |= DM_RET_COPY;
1637
1638                         /*
1639                          * We've already set the return action to stop,
1640                          * since there are no nodes below peripherals in
1641                          * the tree.
1642                          */
1643                         return(retval);
1644                 }
1645
1646                 /*
1647                  * Not sure why someone would do this...
1648                  */
1649                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1650                         continue;
1651
1652                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1653                  && (cur_pattern->path_id != periph->path->bus->path_id))
1654                         continue;
1655
1656                 /*
1657                  * For the target and lun id's, we have to make sure the
1658                  * target and lun pointers aren't NULL.  The xpt peripheral
1659                  * has a wildcard target and device.
1660                  */
1661                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1662                  && ((periph->path->target == NULL)
1663                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1664                         continue;
1665
1666                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1667                  && ((periph->path->device == NULL)
1668                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1669                         continue;
1670
1671                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1672                  && (cur_pattern->unit_number != periph->unit_number))
1673                         continue;
1674
1675                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1676                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1677                              DEV_IDLEN) != 0))
1678                         continue;
1679
1680                 /*
1681                  * If we get to this point, the user definitely wants
1682                  * information on this peripheral.  So tell the caller to
1683                  * copy the data out.
1684                  */
1685                 retval |= DM_RET_COPY;
1686
1687                 /*
1688                  * The return action has already been set to stop, since
1689                  * peripherals don't have any nodes below them in the EDT.
1690                  */
1691                 return(retval);
1692         }
1693
1694         /*
1695          * If we get to this point, the peripheral that was passed in
1696          * doesn't match any of the patterns.
1697          */
1698         return(retval);
1699 }
1700
1701 static int
1702 xptedtbusfunc(struct cam_eb *bus, void *arg)
1703 {
1704         struct ccb_dev_match *cdm;
1705         struct cam_et *target;
1706         dev_match_ret retval;
1707
1708         cdm = (struct ccb_dev_match *)arg;
1709
1710         /*
1711          * If our position is for something deeper in the tree, that means
1712          * that we've already seen this node.  So, we keep going down.
1713          */
1714         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1715          && (cdm->pos.cookie.bus == bus)
1716          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1717          && (cdm->pos.cookie.target != NULL))
1718                 retval = DM_RET_DESCEND;
1719         else
1720                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1721
1722         /*
1723          * If we got an error, bail out of the search.
1724          */
1725         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1726                 cdm->status = CAM_DEV_MATCH_ERROR;
1727                 return(0);
1728         }
1729
1730         /*
1731          * If the copy flag is set, copy this bus out.
1732          */
1733         if (retval & DM_RET_COPY) {
1734                 int spaceleft, j;
1735
1736                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1737                         sizeof(struct dev_match_result));
1738
1739                 /*
1740                  * If we don't have enough space to put in another
1741                  * match result, save our position and tell the
1742                  * user there are more devices to check.
1743                  */
1744                 if (spaceleft < sizeof(struct dev_match_result)) {
1745                         bzero(&cdm->pos, sizeof(cdm->pos));
1746                         cdm->pos.position_type =
1747                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1748
1749                         cdm->pos.cookie.bus = bus;
1750                         cdm->pos.generations[CAM_BUS_GENERATION]=
1751                                 xsoftc.bus_generation;
1752                         cdm->status = CAM_DEV_MATCH_MORE;
1753                         return(0);
1754                 }
1755                 j = cdm->num_matches;
1756                 cdm->num_matches++;
1757                 cdm->matches[j].type = DEV_MATCH_BUS;
1758                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1759                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1760                 cdm->matches[j].result.bus_result.unit_number =
1761                         bus->sim->unit_number;
1762                 strlcpy(cdm->matches[j].result.bus_result.dev_name,
1763                         bus->sim->sim_name,
1764                         sizeof(cdm->matches[j].result.bus_result.dev_name));
1765         }
1766
1767         /*
1768          * If the user is only interested in buses, there's no
1769          * reason to descend to the next level in the tree.
1770          */
1771         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1772                 return(1);
1773
1774         /*
1775          * If there is a target generation recorded, check it to
1776          * make sure the target list hasn't changed.
1777          */
1778         mtx_lock(&bus->eb_mtx);
1779         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1780          && (cdm->pos.cookie.bus == bus)
1781          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1782          && (cdm->pos.cookie.target != NULL)) {
1783                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1784                     bus->generation)) {
1785                         mtx_unlock(&bus->eb_mtx);
1786                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1787                         return (0);
1788                 }
1789                 target = (struct cam_et *)cdm->pos.cookie.target;
1790                 target->refcount++;
1791         } else
1792                 target = NULL;
1793         mtx_unlock(&bus->eb_mtx);
1794
1795         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1796 }
1797
1798 static int
1799 xptedttargetfunc(struct cam_et *target, void *arg)
1800 {
1801         struct ccb_dev_match *cdm;
1802         struct cam_eb *bus;
1803         struct cam_ed *device;
1804
1805         cdm = (struct ccb_dev_match *)arg;
1806         bus = target->bus;
1807
1808         /*
1809          * If there is a device list generation recorded, check it to
1810          * make sure the device list hasn't changed.
1811          */
1812         mtx_lock(&bus->eb_mtx);
1813         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1814          && (cdm->pos.cookie.bus == bus)
1815          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1816          && (cdm->pos.cookie.target == target)
1817          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1818          && (cdm->pos.cookie.device != NULL)) {
1819                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1820                     target->generation) {
1821                         mtx_unlock(&bus->eb_mtx);
1822                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1823                         return(0);
1824                 }
1825                 device = (struct cam_ed *)cdm->pos.cookie.device;
1826                 device->refcount++;
1827         } else
1828                 device = NULL;
1829         mtx_unlock(&bus->eb_mtx);
1830
1831         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1832 }
1833
1834 static int
1835 xptedtdevicefunc(struct cam_ed *device, void *arg)
1836 {
1837         struct cam_eb *bus;
1838         struct cam_periph *periph;
1839         struct ccb_dev_match *cdm;
1840         dev_match_ret retval;
1841
1842         cdm = (struct ccb_dev_match *)arg;
1843         bus = device->target->bus;
1844
1845         /*
1846          * If our position is for something deeper in the tree, that means
1847          * that we've already seen this node.  So, we keep going down.
1848          */
1849         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1850          && (cdm->pos.cookie.device == device)
1851          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1852          && (cdm->pos.cookie.periph != NULL))
1853                 retval = DM_RET_DESCEND;
1854         else
1855                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1856                                         device);
1857
1858         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1859                 cdm->status = CAM_DEV_MATCH_ERROR;
1860                 return(0);
1861         }
1862
1863         /*
1864          * If the copy flag is set, copy this device out.
1865          */
1866         if (retval & DM_RET_COPY) {
1867                 int spaceleft, j;
1868
1869                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1870                         sizeof(struct dev_match_result));
1871
1872                 /*
1873                  * If we don't have enough space to put in another
1874                  * match result, save our position and tell the
1875                  * user there are more devices to check.
1876                  */
1877                 if (spaceleft < sizeof(struct dev_match_result)) {
1878                         bzero(&cdm->pos, sizeof(cdm->pos));
1879                         cdm->pos.position_type =
1880                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1881                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1882
1883                         cdm->pos.cookie.bus = device->target->bus;
1884                         cdm->pos.generations[CAM_BUS_GENERATION]=
1885                                 xsoftc.bus_generation;
1886                         cdm->pos.cookie.target = device->target;
1887                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1888                                 device->target->bus->generation;
1889                         cdm->pos.cookie.device = device;
1890                         cdm->pos.generations[CAM_DEV_GENERATION] =
1891                                 device->target->generation;
1892                         cdm->status = CAM_DEV_MATCH_MORE;
1893                         return(0);
1894                 }
1895                 j = cdm->num_matches;
1896                 cdm->num_matches++;
1897                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1898                 cdm->matches[j].result.device_result.path_id =
1899                         device->target->bus->path_id;
1900                 cdm->matches[j].result.device_result.target_id =
1901                         device->target->target_id;
1902                 cdm->matches[j].result.device_result.target_lun =
1903                         device->lun_id;
1904                 cdm->matches[j].result.device_result.protocol =
1905                         device->protocol;
1906                 bcopy(&device->inq_data,
1907                       &cdm->matches[j].result.device_result.inq_data,
1908                       sizeof(struct scsi_inquiry_data));
1909                 bcopy(&device->ident_data,
1910                       &cdm->matches[j].result.device_result.ident_data,
1911                       sizeof(struct ata_params));
1912                 bcopy(&device->mmc_ident_data,
1913                       &cdm->matches[j].result.device_result.mmc_ident_data,
1914                       sizeof(struct mmc_params));
1915
1916                 /* Let the user know whether this device is unconfigured */
1917                 if (device->flags & CAM_DEV_UNCONFIGURED)
1918                         cdm->matches[j].result.device_result.flags =
1919                                 DEV_RESULT_UNCONFIGURED;
1920                 else
1921                         cdm->matches[j].result.device_result.flags =
1922                                 DEV_RESULT_NOFLAG;
1923         }
1924
1925         /*
1926          * If the user isn't interested in peripherals, don't descend
1927          * the tree any further.
1928          */
1929         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1930                 return(1);
1931
1932         /*
1933          * If there is a peripheral list generation recorded, make sure
1934          * it hasn't changed.
1935          */
1936         xpt_lock_buses();
1937         mtx_lock(&bus->eb_mtx);
1938         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1939          && (cdm->pos.cookie.bus == bus)
1940          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1941          && (cdm->pos.cookie.target == device->target)
1942          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1943          && (cdm->pos.cookie.device == device)
1944          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1945          && (cdm->pos.cookie.periph != NULL)) {
1946                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1947                     device->generation) {
1948                         mtx_unlock(&bus->eb_mtx);
1949                         xpt_unlock_buses();
1950                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1951                         return(0);
1952                 }
1953                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1954                 periph->refcount++;
1955         } else
1956                 periph = NULL;
1957         mtx_unlock(&bus->eb_mtx);
1958         xpt_unlock_buses();
1959
1960         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1961 }
1962
1963 static int
1964 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1965 {
1966         struct ccb_dev_match *cdm;
1967         dev_match_ret retval;
1968
1969         cdm = (struct ccb_dev_match *)arg;
1970
1971         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1972
1973         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1974                 cdm->status = CAM_DEV_MATCH_ERROR;
1975                 return(0);
1976         }
1977
1978         /*
1979          * If the copy flag is set, copy this peripheral out.
1980          */
1981         if (retval & DM_RET_COPY) {
1982                 int spaceleft, j;
1983                 size_t l;
1984
1985                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1986                         sizeof(struct dev_match_result));
1987
1988                 /*
1989                  * If we don't have enough space to put in another
1990                  * match result, save our position and tell the
1991                  * user there are more devices to check.
1992                  */
1993                 if (spaceleft < sizeof(struct dev_match_result)) {
1994                         bzero(&cdm->pos, sizeof(cdm->pos));
1995                         cdm->pos.position_type =
1996                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1997                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1998                                 CAM_DEV_POS_PERIPH;
1999
2000                         cdm->pos.cookie.bus = periph->path->bus;
2001                         cdm->pos.generations[CAM_BUS_GENERATION]=
2002                                 xsoftc.bus_generation;
2003                         cdm->pos.cookie.target = periph->path->target;
2004                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2005                                 periph->path->bus->generation;
2006                         cdm->pos.cookie.device = periph->path->device;
2007                         cdm->pos.generations[CAM_DEV_GENERATION] =
2008                                 periph->path->target->generation;
2009                         cdm->pos.cookie.periph = periph;
2010                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2011                                 periph->path->device->generation;
2012                         cdm->status = CAM_DEV_MATCH_MORE;
2013                         return(0);
2014                 }
2015
2016                 j = cdm->num_matches;
2017                 cdm->num_matches++;
2018                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2019                 cdm->matches[j].result.periph_result.path_id =
2020                         periph->path->bus->path_id;
2021                 cdm->matches[j].result.periph_result.target_id =
2022                         periph->path->target->target_id;
2023                 cdm->matches[j].result.periph_result.target_lun =
2024                         periph->path->device->lun_id;
2025                 cdm->matches[j].result.periph_result.unit_number =
2026                         periph->unit_number;
2027                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2028                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2029                         periph->periph_name, l);
2030         }
2031
2032         return(1);
2033 }
2034
2035 static int
2036 xptedtmatch(struct ccb_dev_match *cdm)
2037 {
2038         struct cam_eb *bus;
2039         int ret;
2040
2041         cdm->num_matches = 0;
2042
2043         /*
2044          * Check the bus list generation.  If it has changed, the user
2045          * needs to reset everything and start over.
2046          */
2047         xpt_lock_buses();
2048         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2049          && (cdm->pos.cookie.bus != NULL)) {
2050                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
2051                     xsoftc.bus_generation) {
2052                         xpt_unlock_buses();
2053                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2054                         return(0);
2055                 }
2056                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
2057                 bus->refcount++;
2058         } else
2059                 bus = NULL;
2060         xpt_unlock_buses();
2061
2062         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
2063
2064         /*
2065          * If we get back 0, that means that we had to stop before fully
2066          * traversing the EDT.  It also means that one of the subroutines
2067          * has set the status field to the proper value.  If we get back 1,
2068          * we've fully traversed the EDT and copied out any matching entries.
2069          */
2070         if (ret == 1)
2071                 cdm->status = CAM_DEV_MATCH_LAST;
2072
2073         return(ret);
2074 }
2075
2076 static int
2077 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2078 {
2079         struct cam_periph *periph;
2080         struct ccb_dev_match *cdm;
2081
2082         cdm = (struct ccb_dev_match *)arg;
2083
2084         xpt_lock_buses();
2085         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2086          && (cdm->pos.cookie.pdrv == pdrv)
2087          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2088          && (cdm->pos.cookie.periph != NULL)) {
2089                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2090                     (*pdrv)->generation) {
2091                         xpt_unlock_buses();
2092                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2093                         return(0);
2094                 }
2095                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
2096                 periph->refcount++;
2097         } else
2098                 periph = NULL;
2099         xpt_unlock_buses();
2100
2101         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
2102 }
2103
2104 static int
2105 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2106 {
2107         struct ccb_dev_match *cdm;
2108         dev_match_ret retval;
2109
2110         cdm = (struct ccb_dev_match *)arg;
2111
2112         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2113
2114         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2115                 cdm->status = CAM_DEV_MATCH_ERROR;
2116                 return(0);
2117         }
2118
2119         /*
2120          * If the copy flag is set, copy this peripheral out.
2121          */
2122         if (retval & DM_RET_COPY) {
2123                 int spaceleft, j;
2124                 size_t l;
2125
2126                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2127                         sizeof(struct dev_match_result));
2128
2129                 /*
2130                  * If we don't have enough space to put in another
2131                  * match result, save our position and tell the
2132                  * user there are more devices to check.
2133                  */
2134                 if (spaceleft < sizeof(struct dev_match_result)) {
2135                         struct periph_driver **pdrv;
2136
2137                         pdrv = NULL;
2138                         bzero(&cdm->pos, sizeof(cdm->pos));
2139                         cdm->pos.position_type =
2140                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2141                                 CAM_DEV_POS_PERIPH;
2142
2143                         /*
2144                          * This may look a bit non-sensical, but it is
2145                          * actually quite logical.  There are very few
2146                          * peripheral drivers, and bloating every peripheral
2147                          * structure with a pointer back to its parent
2148                          * peripheral driver linker set entry would cost
2149                          * more in the long run than doing this quick lookup.
2150                          */
2151                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2152                                 if (strcmp((*pdrv)->driver_name,
2153                                     periph->periph_name) == 0)
2154                                         break;
2155                         }
2156
2157                         if (*pdrv == NULL) {
2158                                 cdm->status = CAM_DEV_MATCH_ERROR;
2159                                 return(0);
2160                         }
2161
2162                         cdm->pos.cookie.pdrv = pdrv;
2163                         /*
2164                          * The periph generation slot does double duty, as
2165                          * does the periph pointer slot.  They are used for
2166                          * both edt and pdrv lookups and positioning.
2167                          */
2168                         cdm->pos.cookie.periph = periph;
2169                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2170                                 (*pdrv)->generation;
2171                         cdm->status = CAM_DEV_MATCH_MORE;
2172                         return(0);
2173                 }
2174
2175                 j = cdm->num_matches;
2176                 cdm->num_matches++;
2177                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2178                 cdm->matches[j].result.periph_result.path_id =
2179                         periph->path->bus->path_id;
2180
2181                 /*
2182                  * The transport layer peripheral doesn't have a target or
2183                  * lun.
2184                  */
2185                 if (periph->path->target)
2186                         cdm->matches[j].result.periph_result.target_id =
2187                                 periph->path->target->target_id;
2188                 else
2189                         cdm->matches[j].result.periph_result.target_id =
2190                                 CAM_TARGET_WILDCARD;
2191
2192                 if (periph->path->device)
2193                         cdm->matches[j].result.periph_result.target_lun =
2194                                 periph->path->device->lun_id;
2195                 else
2196                         cdm->matches[j].result.periph_result.target_lun =
2197                                 CAM_LUN_WILDCARD;
2198
2199                 cdm->matches[j].result.periph_result.unit_number =
2200                         periph->unit_number;
2201                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2202                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2203                         periph->periph_name, l);
2204         }
2205
2206         return(1);
2207 }
2208
2209 static int
2210 xptperiphlistmatch(struct ccb_dev_match *cdm)
2211 {
2212         int ret;
2213
2214         cdm->num_matches = 0;
2215
2216         /*
2217          * At this point in the edt traversal function, we check the bus
2218          * list generation to make sure that no buses have been added or
2219          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2220          * For the peripheral driver list traversal function, however, we
2221          * don't have to worry about new peripheral driver types coming or
2222          * going; they're in a linker set, and therefore can't change
2223          * without a recompile.
2224          */
2225
2226         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2227          && (cdm->pos.cookie.pdrv != NULL))
2228                 ret = xptpdrvtraverse(
2229                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2230                                 xptplistpdrvfunc, cdm);
2231         else
2232                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2233
2234         /*
2235          * If we get back 0, that means that we had to stop before fully
2236          * traversing the peripheral driver tree.  It also means that one of
2237          * the subroutines has set the status field to the proper value.  If
2238          * we get back 1, we've fully traversed the EDT and copied out any
2239          * matching entries.
2240          */
2241         if (ret == 1)
2242                 cdm->status = CAM_DEV_MATCH_LAST;
2243
2244         return(ret);
2245 }
2246
2247 static int
2248 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2249 {
2250         struct cam_eb *bus, *next_bus;
2251         int retval;
2252
2253         retval = 1;
2254         if (start_bus)
2255                 bus = start_bus;
2256         else {
2257                 xpt_lock_buses();
2258                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2259                 if (bus == NULL) {
2260                         xpt_unlock_buses();
2261                         return (retval);
2262                 }
2263                 bus->refcount++;
2264                 xpt_unlock_buses();
2265         }
2266         for (; bus != NULL; bus = next_bus) {
2267                 retval = tr_func(bus, arg);
2268                 if (retval == 0) {
2269                         xpt_release_bus(bus);
2270                         break;
2271                 }
2272                 xpt_lock_buses();
2273                 next_bus = TAILQ_NEXT(bus, links);
2274                 if (next_bus)
2275                         next_bus->refcount++;
2276                 xpt_unlock_buses();
2277                 xpt_release_bus(bus);
2278         }
2279         return(retval);
2280 }
2281
2282 static int
2283 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2284                   xpt_targetfunc_t *tr_func, void *arg)
2285 {
2286         struct cam_et *target, *next_target;
2287         int retval;
2288
2289         retval = 1;
2290         if (start_target)
2291                 target = start_target;
2292         else {
2293                 mtx_lock(&bus->eb_mtx);
2294                 target = TAILQ_FIRST(&bus->et_entries);
2295                 if (target == NULL) {
2296                         mtx_unlock(&bus->eb_mtx);
2297                         return (retval);
2298                 }
2299                 target->refcount++;
2300                 mtx_unlock(&bus->eb_mtx);
2301         }
2302         for (; target != NULL; target = next_target) {
2303                 retval = tr_func(target, arg);
2304                 if (retval == 0) {
2305                         xpt_release_target(target);
2306                         break;
2307                 }
2308                 mtx_lock(&bus->eb_mtx);
2309                 next_target = TAILQ_NEXT(target, links);
2310                 if (next_target)
2311                         next_target->refcount++;
2312                 mtx_unlock(&bus->eb_mtx);
2313                 xpt_release_target(target);
2314         }
2315         return(retval);
2316 }
2317
2318 static int
2319 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2320                   xpt_devicefunc_t *tr_func, void *arg)
2321 {
2322         struct cam_eb *bus;
2323         struct cam_ed *device, *next_device;
2324         int retval;
2325
2326         retval = 1;
2327         bus = target->bus;
2328         if (start_device)
2329                 device = start_device;
2330         else {
2331                 mtx_lock(&bus->eb_mtx);
2332                 device = TAILQ_FIRST(&target->ed_entries);
2333                 if (device == NULL) {
2334                         mtx_unlock(&bus->eb_mtx);
2335                         return (retval);
2336                 }
2337                 device->refcount++;
2338                 mtx_unlock(&bus->eb_mtx);
2339         }
2340         for (; device != NULL; device = next_device) {
2341                 mtx_lock(&device->device_mtx);
2342                 retval = tr_func(device, arg);
2343                 mtx_unlock(&device->device_mtx);
2344                 if (retval == 0) {
2345                         xpt_release_device(device);
2346                         break;
2347                 }
2348                 mtx_lock(&bus->eb_mtx);
2349                 next_device = TAILQ_NEXT(device, links);
2350                 if (next_device)
2351                         next_device->refcount++;
2352                 mtx_unlock(&bus->eb_mtx);
2353                 xpt_release_device(device);
2354         }
2355         return(retval);
2356 }
2357
2358 static int
2359 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2360                   xpt_periphfunc_t *tr_func, void *arg)
2361 {
2362         struct cam_eb *bus;
2363         struct cam_periph *periph, *next_periph;
2364         int retval;
2365
2366         retval = 1;
2367
2368         bus = device->target->bus;
2369         if (start_periph)
2370                 periph = start_periph;
2371         else {
2372                 xpt_lock_buses();
2373                 mtx_lock(&bus->eb_mtx);
2374                 periph = SLIST_FIRST(&device->periphs);
2375                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2376                         periph = SLIST_NEXT(periph, periph_links);
2377                 if (periph == NULL) {
2378                         mtx_unlock(&bus->eb_mtx);
2379                         xpt_unlock_buses();
2380                         return (retval);
2381                 }
2382                 periph->refcount++;
2383                 mtx_unlock(&bus->eb_mtx);
2384                 xpt_unlock_buses();
2385         }
2386         for (; periph != NULL; periph = next_periph) {
2387                 retval = tr_func(periph, arg);
2388                 if (retval == 0) {
2389                         cam_periph_release_locked(periph);
2390                         break;
2391                 }
2392                 xpt_lock_buses();
2393                 mtx_lock(&bus->eb_mtx);
2394                 next_periph = SLIST_NEXT(periph, periph_links);
2395                 while (next_periph != NULL &&
2396                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2397                         next_periph = SLIST_NEXT(next_periph, periph_links);
2398                 if (next_periph)
2399                         next_periph->refcount++;
2400                 mtx_unlock(&bus->eb_mtx);
2401                 xpt_unlock_buses();
2402                 cam_periph_release_locked(periph);
2403         }
2404         return(retval);
2405 }
2406
2407 static int
2408 xptpdrvtraverse(struct periph_driver **start_pdrv,
2409                 xpt_pdrvfunc_t *tr_func, void *arg)
2410 {
2411         struct periph_driver **pdrv;
2412         int retval;
2413
2414         retval = 1;
2415
2416         /*
2417          * We don't traverse the peripheral driver list like we do the
2418          * other lists, because it is a linker set, and therefore cannot be
2419          * changed during runtime.  If the peripheral driver list is ever
2420          * re-done to be something other than a linker set (i.e. it can
2421          * change while the system is running), the list traversal should
2422          * be modified to work like the other traversal functions.
2423          */
2424         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2425              *pdrv != NULL; pdrv++) {
2426                 retval = tr_func(pdrv, arg);
2427
2428                 if (retval == 0)
2429                         return(retval);
2430         }
2431
2432         return(retval);
2433 }
2434
2435 static int
2436 xptpdperiphtraverse(struct periph_driver **pdrv,
2437                     struct cam_periph *start_periph,
2438                     xpt_periphfunc_t *tr_func, void *arg)
2439 {
2440         struct cam_periph *periph, *next_periph;
2441         int retval;
2442
2443         retval = 1;
2444
2445         if (start_periph)
2446                 periph = start_periph;
2447         else {
2448                 xpt_lock_buses();
2449                 periph = TAILQ_FIRST(&(*pdrv)->units);
2450                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2451                         periph = TAILQ_NEXT(periph, unit_links);
2452                 if (periph == NULL) {
2453                         xpt_unlock_buses();
2454                         return (retval);
2455                 }
2456                 periph->refcount++;
2457                 xpt_unlock_buses();
2458         }
2459         for (; periph != NULL; periph = next_periph) {
2460                 cam_periph_lock(periph);
2461                 retval = tr_func(periph, arg);
2462                 cam_periph_unlock(periph);
2463                 if (retval == 0) {
2464                         cam_periph_release(periph);
2465                         break;
2466                 }
2467                 xpt_lock_buses();
2468                 next_periph = TAILQ_NEXT(periph, unit_links);
2469                 while (next_periph != NULL &&
2470                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2471                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2472                 if (next_periph)
2473                         next_periph->refcount++;
2474                 xpt_unlock_buses();
2475                 cam_periph_release(periph);
2476         }
2477         return(retval);
2478 }
2479
2480 static int
2481 xptdefbusfunc(struct cam_eb *bus, void *arg)
2482 {
2483         struct xpt_traverse_config *tr_config;
2484
2485         tr_config = (struct xpt_traverse_config *)arg;
2486
2487         if (tr_config->depth == XPT_DEPTH_BUS) {
2488                 xpt_busfunc_t *tr_func;
2489
2490                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2491
2492                 return(tr_func(bus, tr_config->tr_arg));
2493         } else
2494                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2495 }
2496
2497 static int
2498 xptdeftargetfunc(struct cam_et *target, void *arg)
2499 {
2500         struct xpt_traverse_config *tr_config;
2501
2502         tr_config = (struct xpt_traverse_config *)arg;
2503
2504         if (tr_config->depth == XPT_DEPTH_TARGET) {
2505                 xpt_targetfunc_t *tr_func;
2506
2507                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2508
2509                 return(tr_func(target, tr_config->tr_arg));
2510         } else
2511                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2512 }
2513
2514 static int
2515 xptdefdevicefunc(struct cam_ed *device, void *arg)
2516 {
2517         struct xpt_traverse_config *tr_config;
2518
2519         tr_config = (struct xpt_traverse_config *)arg;
2520
2521         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2522                 xpt_devicefunc_t *tr_func;
2523
2524                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2525
2526                 return(tr_func(device, tr_config->tr_arg));
2527         } else
2528                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2529 }
2530
2531 static int
2532 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2533 {
2534         struct xpt_traverse_config *tr_config;
2535         xpt_periphfunc_t *tr_func;
2536
2537         tr_config = (struct xpt_traverse_config *)arg;
2538
2539         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2540
2541         /*
2542          * Unlike the other default functions, we don't check for depth
2543          * here.  The peripheral driver level is the last level in the EDT,
2544          * so if we're here, we should execute the function in question.
2545          */
2546         return(tr_func(periph, tr_config->tr_arg));
2547 }
2548
2549 /*
2550  * Execute the given function for every bus in the EDT.
2551  */
2552 static int
2553 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2554 {
2555         struct xpt_traverse_config tr_config;
2556
2557         tr_config.depth = XPT_DEPTH_BUS;
2558         tr_config.tr_func = tr_func;
2559         tr_config.tr_arg = arg;
2560
2561         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2562 }
2563
2564 /*
2565  * Execute the given function for every device in the EDT.
2566  */
2567 static int
2568 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2569 {
2570         struct xpt_traverse_config tr_config;
2571
2572         tr_config.depth = XPT_DEPTH_DEVICE;
2573         tr_config.tr_func = tr_func;
2574         tr_config.tr_arg = arg;
2575
2576         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2577 }
2578
2579 static int
2580 xptsetasyncfunc(struct cam_ed *device, void *arg)
2581 {
2582         struct cam_path path;
2583         struct ccb_getdev cgd;
2584         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2585
2586         /*
2587          * Don't report unconfigured devices (Wildcard devs,
2588          * devices only for target mode, device instances
2589          * that have been invalidated but are waiting for
2590          * their last reference count to be released).
2591          */
2592         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2593                 return (1);
2594
2595         xpt_compile_path(&path,
2596                          NULL,
2597                          device->target->bus->path_id,
2598                          device->target->target_id,
2599                          device->lun_id);
2600         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2601         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2602         xpt_action((union ccb *)&cgd);
2603         csa->callback(csa->callback_arg,
2604                             AC_FOUND_DEVICE,
2605                             &path, &cgd);
2606         xpt_release_path(&path);
2607
2608         return(1);
2609 }
2610
2611 static int
2612 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2613 {
2614         struct cam_path path;
2615         struct ccb_pathinq cpi;
2616         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2617
2618         xpt_compile_path(&path, /*periph*/NULL,
2619                          bus->path_id,
2620                          CAM_TARGET_WILDCARD,
2621                          CAM_LUN_WILDCARD);
2622         xpt_path_lock(&path);
2623         xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2624         cpi.ccb_h.func_code = XPT_PATH_INQ;
2625         xpt_action((union ccb *)&cpi);
2626         csa->callback(csa->callback_arg,
2627                             AC_PATH_REGISTERED,
2628                             &path, &cpi);
2629         xpt_path_unlock(&path);
2630         xpt_release_path(&path);
2631
2632         return(1);
2633 }
2634
2635 void
2636 xpt_action(union ccb *start_ccb)
2637 {
2638
2639         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2640             ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2641                 xpt_action_name(start_ccb->ccb_h.func_code)));
2642
2643         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2644         (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb);
2645 }
2646
2647 void
2648 xpt_action_default(union ccb *start_ccb)
2649 {
2650         struct cam_path *path;
2651         struct cam_sim *sim;
2652         struct mtx *mtx;
2653
2654         path = start_ccb->ccb_h.path;
2655         CAM_DEBUG(path, CAM_DEBUG_TRACE,
2656             ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2657                 xpt_action_name(start_ccb->ccb_h.func_code)));
2658
2659         switch (start_ccb->ccb_h.func_code) {
2660         case XPT_SCSI_IO:
2661         {
2662                 struct cam_ed *device;
2663
2664                 /*
2665                  * For the sake of compatibility with SCSI-1
2666                  * devices that may not understand the identify
2667                  * message, we include lun information in the
2668                  * second byte of all commands.  SCSI-1 specifies
2669                  * that luns are a 3 bit value and reserves only 3
2670                  * bits for lun information in the CDB.  Later
2671                  * revisions of the SCSI spec allow for more than 8
2672                  * luns, but have deprecated lun information in the
2673                  * CDB.  So, if the lun won't fit, we must omit.
2674                  *
2675                  * Also be aware that during initial probing for devices,
2676                  * the inquiry information is unknown but initialized to 0.
2677                  * This means that this code will be exercised while probing
2678                  * devices with an ANSI revision greater than 2.
2679                  */
2680                 device = path->device;
2681                 if (device->protocol_version <= SCSI_REV_2
2682                  && start_ccb->ccb_h.target_lun < 8
2683                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2684
2685                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2686                             start_ccb->ccb_h.target_lun << 5;
2687                 }
2688                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2689         }
2690         /* FALLTHROUGH */
2691         case XPT_TARGET_IO:
2692         case XPT_CONT_TARGET_IO:
2693                 start_ccb->csio.sense_resid = 0;
2694                 start_ccb->csio.resid = 0;
2695                 /* FALLTHROUGH */
2696         case XPT_ATA_IO:
2697                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2698                         start_ccb->ataio.resid = 0;
2699                 /* FALLTHROUGH */
2700         case XPT_NVME_IO:
2701                 /* FALLTHROUGH */
2702         case XPT_NVME_ADMIN:
2703                 /* FALLTHROUGH */
2704         case XPT_MMC_IO:
2705                 /* XXX just like nmve_io? */
2706         case XPT_RESET_DEV:
2707         case XPT_ENG_EXEC:
2708         case XPT_SMP_IO:
2709         {
2710                 struct cam_devq *devq;
2711
2712                 devq = path->bus->sim->devq;
2713                 mtx_lock(&devq->send_mtx);
2714                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2715                 if (xpt_schedule_devq(devq, path->device) != 0)
2716                         xpt_run_devq(devq);
2717                 mtx_unlock(&devq->send_mtx);
2718                 break;
2719         }
2720         case XPT_CALC_GEOMETRY:
2721                 /* Filter out garbage */
2722                 if (start_ccb->ccg.block_size == 0
2723                  || start_ccb->ccg.volume_size == 0) {
2724                         start_ccb->ccg.cylinders = 0;
2725                         start_ccb->ccg.heads = 0;
2726                         start_ccb->ccg.secs_per_track = 0;
2727                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2728                         break;
2729                 }
2730 #if defined(__sparc64__)
2731                 /*
2732                  * For sparc64, we may need adjust the geometry of large
2733                  * disks in order to fit the limitations of the 16-bit
2734                  * fields of the VTOC8 disk label.
2735                  */
2736                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2737                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2738                         break;
2739                 }
2740 #endif
2741                 goto call_sim;
2742         case XPT_ABORT:
2743         {
2744                 union ccb* abort_ccb;
2745
2746                 abort_ccb = start_ccb->cab.abort_ccb;
2747                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2748                         struct cam_ed *device;
2749                         struct cam_devq *devq;
2750
2751                         device = abort_ccb->ccb_h.path->device;
2752                         devq = device->sim->devq;
2753
2754                         mtx_lock(&devq->send_mtx);
2755                         if (abort_ccb->ccb_h.pinfo.index > 0) {
2756                                 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb);
2757                                 abort_ccb->ccb_h.status =
2758                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2759                                 xpt_freeze_devq_device(device, 1);
2760                                 mtx_unlock(&devq->send_mtx);
2761                                 xpt_done(abort_ccb);
2762                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2763                                 break;
2764                         }
2765                         mtx_unlock(&devq->send_mtx);
2766
2767                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2768                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2769                                 /*
2770                                  * We've caught this ccb en route to
2771                                  * the SIM.  Flag it for abort and the
2772                                  * SIM will do so just before starting
2773                                  * real work on the CCB.
2774                                  */
2775                                 abort_ccb->ccb_h.status =
2776                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2777                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2778                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2779                                 break;
2780                         }
2781                 }
2782                 if (XPT_FC_IS_QUEUED(abort_ccb)
2783                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2784                         /*
2785                          * It's already completed but waiting
2786                          * for our SWI to get to it.
2787                          */
2788                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2789                         break;
2790                 }
2791                 /*
2792                  * If we weren't able to take care of the abort request
2793                  * in the XPT, pass the request down to the SIM for processing.
2794                  */
2795         }
2796         /* FALLTHROUGH */
2797         case XPT_ACCEPT_TARGET_IO:
2798         case XPT_EN_LUN:
2799         case XPT_IMMED_NOTIFY:
2800         case XPT_NOTIFY_ACK:
2801         case XPT_RESET_BUS:
2802         case XPT_IMMEDIATE_NOTIFY:
2803         case XPT_NOTIFY_ACKNOWLEDGE:
2804         case XPT_GET_SIM_KNOB_OLD:
2805         case XPT_GET_SIM_KNOB:
2806         case XPT_SET_SIM_KNOB:
2807         case XPT_GET_TRAN_SETTINGS:
2808         case XPT_SET_TRAN_SETTINGS:
2809         case XPT_PATH_INQ:
2810 call_sim:
2811                 sim = path->bus->sim;
2812                 mtx = sim->mtx;
2813                 if (mtx && !mtx_owned(mtx))
2814                         mtx_lock(mtx);
2815                 else
2816                         mtx = NULL;
2817
2818                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2819                     ("Calling sim->sim_action(): func=%#x\n", start_ccb->ccb_h.func_code));
2820                 (*(sim->sim_action))(sim, start_ccb);
2821                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2822                     ("sim->sim_action returned: status=%#x\n", start_ccb->ccb_h.status));
2823                 if (mtx)
2824                         mtx_unlock(mtx);
2825                 break;
2826         case XPT_PATH_STATS:
2827                 start_ccb->cpis.last_reset = path->bus->last_reset;
2828                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2829                 break;
2830         case XPT_GDEV_TYPE:
2831         {
2832                 struct cam_ed *dev;
2833
2834                 dev = path->device;
2835                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2836                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2837                 } else {
2838                         struct ccb_getdev *cgd;
2839
2840                         cgd = &start_ccb->cgd;
2841                         cgd->protocol = dev->protocol;
2842                         cgd->inq_data = dev->inq_data;
2843                         cgd->ident_data = dev->ident_data;
2844                         cgd->inq_flags = dev->inq_flags;
2845                         cgd->ccb_h.status = CAM_REQ_CMP;
2846                         cgd->serial_num_len = dev->serial_num_len;
2847                         if ((dev->serial_num_len > 0)
2848                          && (dev->serial_num != NULL))
2849                                 bcopy(dev->serial_num, cgd->serial_num,
2850                                       dev->serial_num_len);
2851                 }
2852                 break;
2853         }
2854         case XPT_GDEV_STATS:
2855         {
2856                 struct ccb_getdevstats *cgds = &start_ccb->cgds;
2857                 struct cam_ed *dev = path->device;
2858                 struct cam_eb *bus = path->bus;
2859                 struct cam_et *tar = path->target;
2860                 struct cam_devq *devq = bus->sim->devq;
2861
2862                 mtx_lock(&devq->send_mtx);
2863                 cgds->dev_openings = dev->ccbq.dev_openings;
2864                 cgds->dev_active = dev->ccbq.dev_active;
2865                 cgds->allocated = dev->ccbq.allocated;
2866                 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2867                 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued;
2868                 cgds->last_reset = tar->last_reset;
2869                 cgds->maxtags = dev->maxtags;
2870                 cgds->mintags = dev->mintags;
2871                 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2872                         cgds->last_reset = bus->last_reset;
2873                 mtx_unlock(&devq->send_mtx);
2874                 cgds->ccb_h.status = CAM_REQ_CMP;
2875                 break;
2876         }
2877         case XPT_GDEVLIST:
2878         {
2879                 struct cam_periph       *nperiph;
2880                 struct periph_list      *periph_head;
2881                 struct ccb_getdevlist   *cgdl;
2882                 u_int                   i;
2883                 struct cam_ed           *device;
2884                 int                     found;
2885
2886
2887                 found = 0;
2888
2889                 /*
2890                  * Don't want anyone mucking with our data.
2891                  */
2892                 device = path->device;
2893                 periph_head = &device->periphs;
2894                 cgdl = &start_ccb->cgdl;
2895
2896                 /*
2897                  * Check and see if the list has changed since the user
2898                  * last requested a list member.  If so, tell them that the
2899                  * list has changed, and therefore they need to start over
2900                  * from the beginning.
2901                  */
2902                 if ((cgdl->index != 0) &&
2903                     (cgdl->generation != device->generation)) {
2904                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2905                         break;
2906                 }
2907
2908                 /*
2909                  * Traverse the list of peripherals and attempt to find
2910                  * the requested peripheral.
2911                  */
2912                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2913                      (nperiph != NULL) && (i <= cgdl->index);
2914                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2915                         if (i == cgdl->index) {
2916                                 strlcpy(cgdl->periph_name,
2917                                         nperiph->periph_name,
2918                                         sizeof(cgdl->periph_name));
2919                                 cgdl->unit_number = nperiph->unit_number;
2920                                 found = 1;
2921                         }
2922                 }
2923                 if (found == 0) {
2924                         cgdl->status = CAM_GDEVLIST_ERROR;
2925                         break;
2926                 }
2927
2928                 if (nperiph == NULL)
2929                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2930                 else
2931                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2932
2933                 cgdl->index++;
2934                 cgdl->generation = device->generation;
2935
2936                 cgdl->ccb_h.status = CAM_REQ_CMP;
2937                 break;
2938         }
2939         case XPT_DEV_MATCH:
2940         {
2941                 dev_pos_type position_type;
2942                 struct ccb_dev_match *cdm;
2943
2944                 cdm = &start_ccb->cdm;
2945
2946                 /*
2947                  * There are two ways of getting at information in the EDT.
2948                  * The first way is via the primary EDT tree.  It starts
2949                  * with a list of buses, then a list of targets on a bus,
2950                  * then devices/luns on a target, and then peripherals on a
2951                  * device/lun.  The "other" way is by the peripheral driver
2952                  * lists.  The peripheral driver lists are organized by
2953                  * peripheral driver.  (obviously)  So it makes sense to
2954                  * use the peripheral driver list if the user is looking
2955                  * for something like "da1", or all "da" devices.  If the
2956                  * user is looking for something on a particular bus/target
2957                  * or lun, it's generally better to go through the EDT tree.
2958                  */
2959
2960                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2961                         position_type = cdm->pos.position_type;
2962                 else {
2963                         u_int i;
2964
2965                         position_type = CAM_DEV_POS_NONE;
2966
2967                         for (i = 0; i < cdm->num_patterns; i++) {
2968                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2969                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2970                                         position_type = CAM_DEV_POS_EDT;
2971                                         break;
2972                                 }
2973                         }
2974
2975                         if (cdm->num_patterns == 0)
2976                                 position_type = CAM_DEV_POS_EDT;
2977                         else if (position_type == CAM_DEV_POS_NONE)
2978                                 position_type = CAM_DEV_POS_PDRV;
2979                 }
2980
2981                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2982                 case CAM_DEV_POS_EDT:
2983                         xptedtmatch(cdm);
2984                         break;
2985                 case CAM_DEV_POS_PDRV:
2986                         xptperiphlistmatch(cdm);
2987                         break;
2988                 default:
2989                         cdm->status = CAM_DEV_MATCH_ERROR;
2990                         break;
2991                 }
2992
2993                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2994                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2995                 else
2996                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2997
2998                 break;
2999         }
3000         case XPT_SASYNC_CB:
3001         {
3002                 struct ccb_setasync *csa;
3003                 struct async_node *cur_entry;
3004                 struct async_list *async_head;
3005                 u_int32_t added;
3006
3007                 csa = &start_ccb->csa;
3008                 added = csa->event_enable;
3009                 async_head = &path->device->asyncs;
3010
3011                 /*
3012                  * If there is already an entry for us, simply
3013                  * update it.
3014                  */
3015                 cur_entry = SLIST_FIRST(async_head);
3016                 while (cur_entry != NULL) {
3017                         if ((cur_entry->callback_arg == csa->callback_arg)
3018                          && (cur_entry->callback == csa->callback))
3019                                 break;
3020                         cur_entry = SLIST_NEXT(cur_entry, links);
3021                 }
3022
3023                 if (cur_entry != NULL) {
3024                         /*
3025                          * If the request has no flags set,
3026                          * remove the entry.
3027                          */
3028                         added &= ~cur_entry->event_enable;
3029                         if (csa->event_enable == 0) {
3030                                 SLIST_REMOVE(async_head, cur_entry,
3031                                              async_node, links);
3032                                 xpt_release_device(path->device);
3033                                 free(cur_entry, M_CAMXPT);
3034                         } else {
3035                                 cur_entry->event_enable = csa->event_enable;
3036                         }
3037                         csa->event_enable = added;
3038                 } else {
3039                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3040                                            M_NOWAIT);
3041                         if (cur_entry == NULL) {
3042                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3043                                 break;
3044                         }
3045                         cur_entry->event_enable = csa->event_enable;
3046                         cur_entry->event_lock = (path->bus->sim->mtx &&
3047                             mtx_owned(path->bus->sim->mtx)) ? 1 : 0;
3048                         cur_entry->callback_arg = csa->callback_arg;
3049                         cur_entry->callback = csa->callback;
3050                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3051                         xpt_acquire_device(path->device);
3052                 }
3053                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3054                 break;
3055         }
3056         case XPT_REL_SIMQ:
3057         {
3058                 struct ccb_relsim *crs;
3059                 struct cam_ed *dev;
3060
3061                 crs = &start_ccb->crs;
3062                 dev = path->device;
3063                 if (dev == NULL) {
3064
3065                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3066                         break;
3067                 }
3068
3069                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3070
3071                         /* Don't ever go below one opening */
3072                         if (crs->openings > 0) {
3073                                 xpt_dev_ccbq_resize(path, crs->openings);
3074                                 if (bootverbose) {
3075                                         xpt_print(path,
3076                                             "number of openings is now %d\n",
3077                                             crs->openings);
3078                                 }
3079                         }
3080                 }
3081
3082                 mtx_lock(&dev->sim->devq->send_mtx);
3083                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3084
3085                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3086
3087                                 /*
3088                                  * Just extend the old timeout and decrement
3089                                  * the freeze count so that a single timeout
3090                                  * is sufficient for releasing the queue.
3091                                  */
3092                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3093                                 callout_stop(&dev->callout);
3094                         } else {
3095
3096                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3097                         }
3098
3099                         callout_reset_sbt(&dev->callout,
3100                             SBT_1MS * crs->release_timeout, 0,
3101                             xpt_release_devq_timeout, dev, 0);
3102
3103                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3104
3105                 }
3106
3107                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3108
3109                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3110                                 /*
3111                                  * Decrement the freeze count so that a single
3112                                  * completion is still sufficient to unfreeze
3113                                  * the queue.
3114                                  */
3115                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3116                         } else {
3117
3118                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3119                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3120                         }
3121                 }
3122
3123                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3124
3125                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3126                          || (dev->ccbq.dev_active == 0)) {
3127
3128                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3129                         } else {
3130
3131                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3132                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3133                         }
3134                 }
3135                 mtx_unlock(&dev->sim->devq->send_mtx);
3136
3137                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3138                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3139                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3140                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3141                 break;
3142         }
3143         case XPT_DEBUG: {
3144                 struct cam_path *oldpath;
3145
3146                 /* Check that all request bits are supported. */
3147                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3148                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3149                         break;
3150                 }
3151
3152                 cam_dflags = CAM_DEBUG_NONE;
3153                 if (cam_dpath != NULL) {
3154                         oldpath = cam_dpath;
3155                         cam_dpath = NULL;
3156                         xpt_free_path(oldpath);
3157                 }
3158                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3159                         if (xpt_create_path(&cam_dpath, NULL,
3160                                             start_ccb->ccb_h.path_id,
3161                                             start_ccb->ccb_h.target_id,
3162                                             start_ccb->ccb_h.target_lun) !=
3163                                             CAM_REQ_CMP) {
3164                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3165                         } else {
3166                                 cam_dflags = start_ccb->cdbg.flags;
3167                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3168                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3169                                     cam_dflags);
3170                         }
3171                 } else
3172                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3173                 break;
3174         }
3175         case XPT_NOOP:
3176                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3177                         xpt_freeze_devq(path, 1);
3178                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3179                 break;
3180         case XPT_REPROBE_LUN:
3181                 xpt_async(AC_INQ_CHANGED, path, NULL);
3182                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3183                 xpt_done(start_ccb);
3184                 break;
3185         default:
3186         case XPT_SDEV_TYPE:
3187         case XPT_TERM_IO:
3188         case XPT_ENG_INQ:
3189                 /* XXX Implement */
3190                 xpt_print(start_ccb->ccb_h.path,
3191                     "%s: CCB type %#x %s not supported\n", __func__,
3192                     start_ccb->ccb_h.func_code,
3193                     xpt_action_name(start_ccb->ccb_h.func_code));
3194                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3195                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3196                         xpt_done(start_ccb);
3197                 }
3198                 break;
3199         }
3200         CAM_DEBUG(path, CAM_DEBUG_TRACE,
3201             ("xpt_action_default: func= %#x %s status %#x\n",
3202                 start_ccb->ccb_h.func_code,
3203                 xpt_action_name(start_ccb->ccb_h.func_code),
3204                 start_ccb->ccb_h.status));
3205 }
3206
3207 void
3208 xpt_polled_action(union ccb *start_ccb)
3209 {
3210         u_int32_t timeout;
3211         struct    cam_sim *sim;
3212         struct    cam_devq *devq;
3213         struct    cam_ed *dev;
3214         struct mtx *mtx;
3215
3216         timeout = start_ccb->ccb_h.timeout * 10;
3217         sim = start_ccb->ccb_h.path->bus->sim;
3218         devq = sim->devq;
3219         mtx = sim->mtx;
3220         dev = start_ccb->ccb_h.path->device;
3221
3222         mtx_unlock(&dev->device_mtx);
3223
3224         /*
3225          * Steal an opening so that no other queued requests
3226          * can get it before us while we simulate interrupts.
3227          */
3228         mtx_lock(&devq->send_mtx);
3229         dev->ccbq.dev_openings--;
3230         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3231             (--timeout > 0)) {
3232                 mtx_unlock(&devq->send_mtx);
3233                 DELAY(100);
3234                 if (mtx)
3235                         mtx_lock(mtx);
3236                 (*(sim->sim_poll))(sim);
3237                 if (mtx)
3238                         mtx_unlock(mtx);
3239                 camisr_runqueue();
3240                 mtx_lock(&devq->send_mtx);
3241         }
3242         dev->ccbq.dev_openings++;
3243         mtx_unlock(&devq->send_mtx);
3244
3245         if (timeout != 0) {
3246                 xpt_action(start_ccb);
3247                 while(--timeout > 0) {
3248                         if (mtx)
3249                                 mtx_lock(mtx);
3250                         (*(sim->sim_poll))(sim);
3251                         if (mtx)
3252                                 mtx_unlock(mtx);
3253                         camisr_runqueue();
3254                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3255                             != CAM_REQ_INPROG)
3256                                 break;
3257                         DELAY(100);
3258                 }
3259                 if (timeout == 0) {
3260                         /*
3261                          * XXX Is it worth adding a sim_timeout entry
3262                          * point so we can attempt recovery?  If
3263                          * this is only used for dumps, I don't think
3264                          * it is.
3265                          */
3266                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3267                 }
3268         } else {
3269                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3270         }
3271
3272         mtx_lock(&dev->device_mtx);
3273 }
3274
3275 /*
3276  * Schedule a peripheral driver to receive a ccb when its
3277  * target device has space for more transactions.
3278  */
3279 void
3280 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3281 {
3282
3283         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3284         cam_periph_assert(periph, MA_OWNED);
3285         if (new_priority < periph->scheduled_priority) {
3286                 periph->scheduled_priority = new_priority;
3287                 xpt_run_allocq(periph, 0);
3288         }
3289 }
3290
3291
3292 /*
3293  * Schedule a device to run on a given queue.
3294  * If the device was inserted as a new entry on the queue,
3295  * return 1 meaning the device queue should be run. If we
3296  * were already queued, implying someone else has already
3297  * started the queue, return 0 so the caller doesn't attempt
3298  * to run the queue.
3299  */
3300 static int
3301 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3302                  u_int32_t new_priority)
3303 {
3304         int retval;
3305         u_int32_t old_priority;
3306
3307         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3308
3309         old_priority = pinfo->priority;
3310
3311         /*
3312          * Are we already queued?
3313          */
3314         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3315                 /* Simply reorder based on new priority */
3316                 if (new_priority < old_priority) {
3317                         camq_change_priority(queue, pinfo->index,
3318                                              new_priority);
3319                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3320                                         ("changed priority to %d\n",
3321                                          new_priority));
3322                         retval = 1;
3323                 } else
3324                         retval = 0;
3325         } else {
3326                 /* New entry on the queue */
3327                 if (new_priority < old_priority)
3328                         pinfo->priority = new_priority;
3329
3330                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3331                                 ("Inserting onto queue\n"));
3332                 pinfo->generation = ++queue->generation;
3333                 camq_insert(queue, pinfo);
3334                 retval = 1;
3335         }
3336         return (retval);
3337 }
3338
3339 static void
3340 xpt_run_allocq_task(void *context, int pending)
3341 {
3342         struct cam_periph *periph = context;
3343
3344         cam_periph_lock(periph);
3345         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3346         xpt_run_allocq(periph, 1);
3347         cam_periph_unlock(periph);
3348         cam_periph_release(periph);
3349 }
3350
3351 static void
3352 xpt_run_allocq(struct cam_periph *periph, int sleep)
3353 {
3354         struct cam_ed   *device;
3355         union ccb       *ccb;
3356         uint32_t         prio;
3357
3358         cam_periph_assert(periph, MA_OWNED);
3359         if (periph->periph_allocating)
3360                 return;
3361         periph->periph_allocating = 1;
3362         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3363         device = periph->path->device;
3364         ccb = NULL;
3365 restart:
3366         while ((prio = min(periph->scheduled_priority,
3367             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3368             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3369              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3370
3371                 if (ccb == NULL &&
3372                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3373                         if (sleep) {
3374                                 ccb = xpt_get_ccb(periph);
3375                                 goto restart;
3376                         }
3377                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3378                                 break;
3379                         cam_periph_doacquire(periph);
3380                         periph->flags |= CAM_PERIPH_RUN_TASK;
3381                         taskqueue_enqueue(xsoftc.xpt_taskq,
3382                             &periph->periph_run_task);
3383                         break;
3384                 }
3385                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3386                 if (prio == periph->immediate_priority) {
3387                         periph->immediate_priority = CAM_PRIORITY_NONE;
3388                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3389                                         ("waking cam_periph_getccb()\n"));
3390                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3391                                           periph_links.sle);
3392                         wakeup(&periph->ccb_list);
3393                 } else {
3394                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3395                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3396                                         ("calling periph_start()\n"));
3397                         periph->periph_start(periph, ccb);
3398                 }
3399                 ccb = NULL;
3400         }
3401         if (ccb != NULL)
3402                 xpt_release_ccb(ccb);
3403         periph->periph_allocating = 0;
3404 }
3405
3406 static void
3407 xpt_run_devq(struct cam_devq *devq)
3408 {
3409         struct mtx *mtx;
3410
3411         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3412
3413         devq->send_queue.qfrozen_cnt++;
3414         while ((devq->send_queue.entries > 0)
3415             && (devq->send_openings > 0)
3416             && (devq->send_queue.qfrozen_cnt <= 1)) {
3417                 struct  cam_ed *device;
3418                 union ccb *work_ccb;
3419                 struct  cam_sim *sim;
3420                 struct xpt_proto *proto;
3421
3422                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3423                                                            CAMQ_HEAD);
3424                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3425                                 ("running device %p\n", device));
3426
3427                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3428                 if (work_ccb == NULL) {
3429                         printf("device on run queue with no ccbs???\n");
3430                         continue;
3431                 }
3432
3433                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3434
3435                         mtx_lock(&xsoftc.xpt_highpower_lock);
3436                         if (xsoftc.num_highpower <= 0) {
3437                                 /*
3438                                  * We got a high power command, but we
3439                                  * don't have any available slots.  Freeze
3440                                  * the device queue until we have a slot
3441                                  * available.
3442                                  */
3443                                 xpt_freeze_devq_device(device, 1);
3444                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3445                                                    highpowerq_entry);
3446
3447                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3448                                 continue;
3449                         } else {
3450                                 /*
3451                                  * Consume a high power slot while
3452                                  * this ccb runs.
3453                                  */
3454                                 xsoftc.num_highpower--;
3455                         }
3456                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3457                 }
3458                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3459                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3460                 devq->send_openings--;
3461                 devq->send_active++;
3462                 xpt_schedule_devq(devq, device);
3463                 mtx_unlock(&devq->send_mtx);
3464
3465                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3466                         /*
3467                          * The client wants to freeze the queue
3468                          * after this CCB is sent.
3469                          */
3470                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3471                 }
3472
3473                 /* In Target mode, the peripheral driver knows best... */
3474                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3475                         if ((device->inq_flags & SID_CmdQue) != 0
3476                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3477                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3478                         else
3479                                 /*
3480                                  * Clear this in case of a retried CCB that
3481                                  * failed due to a rejected tag.
3482                                  */
3483                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3484                 }
3485
3486                 KASSERT(device == work_ccb->ccb_h.path->device,
3487                     ("device (%p) / path->device (%p) mismatch",
3488                         device, work_ccb->ccb_h.path->device));
3489                 proto = xpt_proto_find(device->protocol);
3490                 if (proto && proto->ops->debug_out)
3491                         proto->ops->debug_out(work_ccb);
3492
3493                 /*
3494                  * Device queues can be shared among multiple SIM instances
3495                  * that reside on different buses.  Use the SIM from the
3496                  * queued device, rather than the one from the calling bus.
3497                  */
3498                 sim = device->sim;
3499                 mtx = sim->mtx;
3500                 if (mtx && !mtx_owned(mtx))
3501                         mtx_lock(mtx);
3502                 else
3503                         mtx = NULL;
3504                 work_ccb->ccb_h.qos.periph_data = cam_iosched_now();
3505                 (*(sim->sim_action))(sim, work_ccb);
3506                 if (mtx)
3507                         mtx_unlock(mtx);
3508                 mtx_lock(&devq->send_mtx);
3509         }
3510         devq->send_queue.qfrozen_cnt--;
3511 }
3512
3513 /*
3514  * This function merges stuff from the slave ccb into the master ccb, while
3515  * keeping important fields in the master ccb constant.
3516  */
3517 void
3518 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3519 {
3520
3521         /*
3522          * Pull fields that are valid for peripheral drivers to set
3523          * into the master CCB along with the CCB "payload".
3524          */
3525         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3526         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3527         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3528         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3529         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3530               sizeof(union ccb) - sizeof(struct ccb_hdr));
3531 }
3532
3533 void
3534 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3535                     u_int32_t priority, u_int32_t flags)
3536 {
3537
3538         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3539         ccb_h->pinfo.priority = priority;
3540         ccb_h->path = path;
3541         ccb_h->path_id = path->bus->path_id;
3542         if (path->target)
3543                 ccb_h->target_id = path->target->target_id;
3544         else
3545                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3546         if (path->device) {
3547                 ccb_h->target_lun = path->device->lun_id;
3548                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3549         } else {
3550                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3551         }
3552         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3553         ccb_h->flags = flags;
3554         ccb_h->xflags = 0;
3555 }
3556
3557 void
3558 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3559 {
3560         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3561 }
3562
3563 /* Path manipulation functions */
3564 cam_status
3565 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3566                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3567 {
3568         struct     cam_path *path;
3569         cam_status status;
3570
3571         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3572
3573         if (path == NULL) {
3574                 status = CAM_RESRC_UNAVAIL;
3575                 return(status);
3576         }
3577         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3578         if (status != CAM_REQ_CMP) {
3579                 free(path, M_CAMPATH);
3580                 path = NULL;
3581         }
3582         *new_path_ptr = path;
3583         return (status);
3584 }
3585
3586 cam_status
3587 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3588                          struct cam_periph *periph, path_id_t path_id,
3589                          target_id_t target_id, lun_id_t lun_id)
3590 {
3591
3592         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3593             lun_id));
3594 }
3595
3596 cam_status
3597 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3598                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3599 {
3600         struct       cam_eb *bus;
3601         struct       cam_et *target;
3602         struct       cam_ed *device;
3603         cam_status   status;
3604
3605         status = CAM_REQ_CMP;   /* Completed without error */
3606         target = NULL;          /* Wildcarded */
3607         device = NULL;          /* Wildcarded */
3608
3609         /*
3610          * We will potentially modify the EDT, so block interrupts
3611          * that may attempt to create cam paths.
3612          */
3613         bus = xpt_find_bus(path_id);
3614         if (bus == NULL) {
3615                 status = CAM_PATH_INVALID;
3616         } else {
3617                 xpt_lock_buses();
3618                 mtx_lock(&bus->eb_mtx);
3619                 target = xpt_find_target(bus, target_id);
3620                 if (target == NULL) {
3621                         /* Create one */
3622                         struct cam_et *new_target;
3623
3624                         new_target = xpt_alloc_target(bus, target_id);
3625                         if (new_target == NULL) {
3626                                 status = CAM_RESRC_UNAVAIL;
3627                         } else {
3628                                 target = new_target;
3629                         }
3630                 }
3631                 xpt_unlock_buses();
3632                 if (target != NULL) {
3633                         device = xpt_find_device(target, lun_id);
3634                         if (device == NULL) {
3635                                 /* Create one */
3636                                 struct cam_ed *new_device;
3637
3638                                 new_device =
3639                                     (*(bus->xport->ops->alloc_device))(bus,
3640                                                                        target,
3641                                                                        lun_id);
3642                                 if (new_device == NULL) {
3643                                         status = CAM_RESRC_UNAVAIL;
3644                                 } else {
3645                                         device = new_device;
3646                                 }
3647                         }
3648                 }
3649                 mtx_unlock(&bus->eb_mtx);
3650         }
3651
3652         /*
3653          * Only touch the user's data if we are successful.
3654          */
3655         if (status == CAM_REQ_CMP) {
3656                 new_path->periph = perph;
3657                 new_path->bus = bus;
3658                 new_path->target = target;
3659                 new_path->device = device;
3660                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3661         } else {
3662                 if (device != NULL)
3663                         xpt_release_device(device);
3664                 if (target != NULL)
3665                         xpt_release_target(target);
3666                 if (bus != NULL)
3667                         xpt_release_bus(bus);
3668         }
3669         return (status);
3670 }
3671
3672 cam_status
3673 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3674 {
3675         struct     cam_path *new_path;
3676
3677         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3678         if (new_path == NULL)
3679                 return(CAM_RESRC_UNAVAIL);
3680         xpt_copy_path(new_path, path);
3681         *new_path_ptr = new_path;
3682         return (CAM_REQ_CMP);
3683 }
3684
3685 void
3686 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3687 {
3688
3689         *new_path = *path;
3690         if (path->bus != NULL)
3691                 xpt_acquire_bus(path->bus);
3692         if (path->target != NULL)
3693                 xpt_acquire_target(path->target);
3694         if (path->device != NULL)
3695                 xpt_acquire_device(path->device);
3696 }
3697
3698 void
3699 xpt_release_path(struct cam_path *path)
3700 {
3701         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3702         if (path->device != NULL) {
3703                 xpt_release_device(path->device);
3704                 path->device = NULL;
3705         }
3706         if (path->target != NULL) {
3707                 xpt_release_target(path->target);
3708                 path->target = NULL;
3709         }
3710         if (path->bus != NULL) {
3711                 xpt_release_bus(path->bus);
3712                 path->bus = NULL;
3713         }
3714 }
3715
3716 void
3717 xpt_free_path(struct cam_path *path)
3718 {
3719
3720         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3721         xpt_release_path(path);
3722         free(path, M_CAMPATH);
3723 }
3724
3725 void
3726 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3727     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3728 {
3729
3730         xpt_lock_buses();
3731         if (bus_ref) {
3732                 if (path->bus)
3733                         *bus_ref = path->bus->refcount;
3734                 else
3735                         *bus_ref = 0;
3736         }
3737         if (periph_ref) {
3738                 if (path->periph)
3739                         *periph_ref = path->periph->refcount;
3740                 else
3741                         *periph_ref = 0;
3742         }
3743         xpt_unlock_buses();
3744         if (target_ref) {
3745                 if (path->target)
3746                         *target_ref = path->target->refcount;
3747                 else
3748                         *target_ref = 0;
3749         }
3750         if (device_ref) {
3751                 if (path->device)
3752                         *device_ref = path->device->refcount;
3753                 else
3754                         *device_ref = 0;
3755         }
3756 }
3757
3758 /*
3759  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3760  * in path1, 2 for match with wildcards in path2.
3761  */
3762 int
3763 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3764 {
3765         int retval = 0;
3766
3767         if (path1->bus != path2->bus) {
3768                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3769                         retval = 1;
3770                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3771                         retval = 2;
3772                 else
3773                         return (-1);
3774         }
3775         if (path1->target != path2->target) {
3776                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3777                         if (retval == 0)
3778                                 retval = 1;
3779                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3780                         retval = 2;
3781                 else
3782                         return (-1);
3783         }
3784         if (path1->device != path2->device) {
3785                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3786                         if (retval == 0)
3787                                 retval = 1;
3788                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3789                         retval = 2;
3790                 else
3791                         return (-1);
3792         }
3793         return (retval);
3794 }
3795
3796 int
3797 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3798 {
3799         int retval = 0;
3800
3801         if (path->bus != dev->target->bus) {
3802                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3803                         retval = 1;
3804                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3805                         retval = 2;
3806                 else
3807                         return (-1);
3808         }
3809         if (path->target != dev->target) {
3810                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3811                         if (retval == 0)
3812                                 retval = 1;
3813                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3814                         retval = 2;
3815                 else
3816                         return (-1);
3817         }
3818         if (path->device != dev) {
3819                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3820                         if (retval == 0)
3821                                 retval = 1;
3822                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3823                         retval = 2;
3824                 else
3825                         return (-1);
3826         }
3827         return (retval);
3828 }
3829
3830 void
3831 xpt_print_path(struct cam_path *path)
3832 {
3833         struct sbuf sb;
3834         char buffer[XPT_PRINT_LEN];
3835
3836         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3837         xpt_path_sbuf(path, &sb);
3838         sbuf_finish(&sb);
3839         printf("%s", sbuf_data(&sb));
3840         sbuf_delete(&sb);
3841 }
3842
3843 void
3844 xpt_print_device(struct cam_ed *device)
3845 {
3846
3847         if (device == NULL)
3848                 printf("(nopath): ");
3849         else {
3850                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3851                        device->sim->unit_number,
3852                        device->sim->bus_id,
3853                        device->target->target_id,
3854                        (uintmax_t)device->lun_id);
3855         }
3856 }
3857
3858 void
3859 xpt_print(struct cam_path *path, const char *fmt, ...)
3860 {
3861         va_list ap;
3862         struct sbuf sb;
3863         char buffer[XPT_PRINT_LEN];
3864
3865         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3866
3867         xpt_path_sbuf(path, &sb);
3868         va_start(ap, fmt);
3869         sbuf_vprintf(&sb, fmt, ap);
3870         va_end(ap);
3871
3872         sbuf_finish(&sb);
3873         printf("%s", sbuf_data(&sb));
3874         sbuf_delete(&sb);
3875 }
3876
3877 int
3878 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3879 {
3880         struct sbuf sb;
3881         int len;
3882
3883         sbuf_new(&sb, str, str_len, 0);
3884         len = xpt_path_sbuf(path, &sb);
3885         sbuf_finish(&sb);
3886         return (len);
3887 }
3888
3889 int
3890 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb)
3891 {
3892
3893         if (path == NULL)
3894                 sbuf_printf(sb, "(nopath): ");
3895         else {
3896                 if (path->periph != NULL)
3897                         sbuf_printf(sb, "(%s%d:", path->periph->periph_name,
3898                                     path->periph->unit_number);
3899                 else
3900                         sbuf_printf(sb, "(noperiph:");
3901
3902                 if (path->bus != NULL)
3903                         sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name,
3904                                     path->bus->sim->unit_number,
3905                                     path->bus->sim->bus_id);
3906                 else
3907                         sbuf_printf(sb, "nobus:");
3908
3909                 if (path->target != NULL)
3910                         sbuf_printf(sb, "%d:", path->target->target_id);
3911                 else
3912                         sbuf_printf(sb, "X:");
3913
3914                 if (path->device != NULL)
3915                         sbuf_printf(sb, "%jx): ",
3916                             (uintmax_t)path->device->lun_id);
3917                 else
3918                         sbuf_printf(sb, "X): ");
3919         }
3920
3921         return(sbuf_len(sb));
3922 }
3923
3924 path_id_t
3925 xpt_path_path_id(struct cam_path *path)
3926 {
3927         return(path->bus->path_id);
3928 }
3929
3930 target_id_t
3931 xpt_path_target_id(struct cam_path *path)
3932 {
3933         if (path->target != NULL)
3934                 return (path->target->target_id);
3935         else
3936                 return (CAM_TARGET_WILDCARD);
3937 }
3938
3939 lun_id_t
3940 xpt_path_lun_id(struct cam_path *path)
3941 {
3942         if (path->device != NULL)
3943                 return (path->device->lun_id);
3944         else
3945                 return (CAM_LUN_WILDCARD);
3946 }
3947
3948 struct cam_sim *
3949 xpt_path_sim(struct cam_path *path)
3950 {
3951
3952         return (path->bus->sim);
3953 }
3954
3955 struct cam_periph*
3956 xpt_path_periph(struct cam_path *path)
3957 {
3958
3959         return (path->periph);
3960 }
3961
3962 /*
3963  * Release a CAM control block for the caller.  Remit the cost of the structure
3964  * to the device referenced by the path.  If the this device had no 'credits'
3965  * and peripheral drivers have registered async callbacks for this notification
3966  * call them now.
3967  */
3968 void
3969 xpt_release_ccb(union ccb *free_ccb)
3970 {
3971         struct   cam_ed *device;
3972         struct   cam_periph *periph;
3973
3974         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3975         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3976         device = free_ccb->ccb_h.path->device;
3977         periph = free_ccb->ccb_h.path->periph;
3978
3979         xpt_free_ccb(free_ccb);
3980         periph->periph_allocated--;
3981         cam_ccbq_release_opening(&device->ccbq);
3982         xpt_run_allocq(periph, 0);
3983 }
3984
3985 /* Functions accessed by SIM drivers */
3986
3987 static struct xpt_xport_ops xport_default_ops = {
3988         .alloc_device = xpt_alloc_device_default,
3989         .action = xpt_action_default,
3990         .async = xpt_dev_async_default,
3991 };
3992 static struct xpt_xport xport_default = {
3993         .xport = XPORT_UNKNOWN,
3994         .name = "unknown",
3995         .ops = &xport_default_ops,
3996 };
3997
3998 CAM_XPT_XPORT(xport_default);
3999
4000 /*
4001  * A sim structure, listing the SIM entry points and instance
4002  * identification info is passed to xpt_bus_register to hook the SIM
4003  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
4004  * for this new bus and places it in the array of buses and assigns
4005  * it a path_id.  The path_id may be influenced by "hard wiring"
4006  * information specified by the user.  Once interrupt services are
4007  * available, the bus will be probed.
4008  */
4009 int32_t
4010 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
4011 {
4012         struct cam_eb *new_bus;
4013         struct cam_eb *old_bus;
4014         struct ccb_pathinq cpi;
4015         struct cam_path *path;
4016         cam_status status;
4017
4018         sim->bus_id = bus;
4019         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4020                                           M_CAMXPT, M_NOWAIT|M_ZERO);
4021         if (new_bus == NULL) {
4022                 /* Couldn't satisfy request */
4023                 return (CAM_RESRC_UNAVAIL);
4024         }
4025
4026         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
4027         TAILQ_INIT(&new_bus->et_entries);
4028         cam_sim_hold(sim);
4029         new_bus->sim = sim;
4030         timevalclear(&new_bus->last_reset);
4031         new_bus->flags = 0;
4032         new_bus->refcount = 1;  /* Held until a bus_deregister event */
4033         new_bus->generation = 0;
4034
4035         xpt_lock_buses();
4036         sim->path_id = new_bus->path_id =
4037             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4038         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4039         while (old_bus != NULL
4040             && old_bus->path_id < new_bus->path_id)
4041                 old_bus = TAILQ_NEXT(old_bus, links);
4042         if (old_bus != NULL)
4043                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4044         else
4045                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
4046         xsoftc.bus_generation++;
4047         xpt_unlock_buses();
4048
4049         /*
4050          * Set a default transport so that a PATH_INQ can be issued to
4051          * the SIM.  This will then allow for probing and attaching of
4052          * a more appropriate transport.
4053          */
4054         new_bus->xport = &xport_default;
4055
4056         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
4057                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4058         if (status != CAM_REQ_CMP) {
4059                 xpt_release_bus(new_bus);
4060                 return (CAM_RESRC_UNAVAIL);
4061         }
4062
4063         xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
4064         cpi.ccb_h.func_code = XPT_PATH_INQ;
4065         xpt_action((union ccb *)&cpi);
4066
4067         if (cpi.ccb_h.status == CAM_REQ_CMP) {
4068                 struct xpt_xport **xpt;
4069
4070                 SET_FOREACH(xpt, cam_xpt_xport_set) {
4071                         if ((*xpt)->xport == cpi.transport) {
4072                                 new_bus->xport = *xpt;
4073                                 break;
4074                         }
4075                 }
4076                 if (new_bus->xport == NULL) {
4077                         xpt_print(path,
4078                             "No transport found for %d\n", cpi.transport);
4079                         xpt_release_bus(new_bus);
4080                         free(path, M_CAMXPT);
4081                         return (CAM_RESRC_UNAVAIL);
4082                 }
4083         }
4084
4085         /* Notify interested parties */
4086         if (sim->path_id != CAM_XPT_PATH_ID) {
4087
4088                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
4089                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
4090                         union   ccb *scan_ccb;
4091
4092                         /* Initiate bus rescan. */
4093                         scan_ccb = xpt_alloc_ccb_nowait();
4094                         if (scan_ccb != NULL) {
4095                                 scan_ccb->ccb_h.path = path;
4096                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
4097                                 scan_ccb->crcn.flags = 0;
4098                                 xpt_rescan(scan_ccb);
4099                         } else {
4100                                 xpt_print(path,
4101                                           "Can't allocate CCB to scan bus\n");
4102                                 xpt_free_path(path);
4103                         }
4104                 } else
4105                         xpt_free_path(path);
4106         } else
4107                 xpt_free_path(path);
4108         return (CAM_SUCCESS);
4109 }
4110
4111 int32_t
4112 xpt_bus_deregister(path_id_t pathid)
4113 {
4114         struct cam_path bus_path;
4115         cam_status status;
4116
4117         status = xpt_compile_path(&bus_path, NULL, pathid,
4118                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4119         if (status != CAM_REQ_CMP)
4120                 return (status);
4121
4122         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4123         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4124
4125         /* Release the reference count held while registered. */
4126         xpt_release_bus(bus_path.bus);
4127         xpt_release_path(&bus_path);
4128
4129         return (CAM_REQ_CMP);
4130 }
4131
4132 static path_id_t
4133 xptnextfreepathid(void)
4134 {
4135         struct cam_eb *bus;
4136         path_id_t pathid;
4137         const char *strval;
4138
4139         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4140         pathid = 0;
4141         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4142 retry:
4143         /* Find an unoccupied pathid */
4144         while (bus != NULL && bus->path_id <= pathid) {
4145                 if (bus->path_id == pathid)
4146                         pathid++;
4147                 bus = TAILQ_NEXT(bus, links);
4148         }
4149
4150         /*
4151          * Ensure that this pathid is not reserved for
4152          * a bus that may be registered in the future.
4153          */
4154         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4155                 ++pathid;
4156                 /* Start the search over */
4157                 goto retry;
4158         }
4159         return (pathid);
4160 }
4161
4162 static path_id_t
4163 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4164 {
4165         path_id_t pathid;
4166         int i, dunit, val;
4167         char buf[32];
4168         const char *dname;
4169
4170         pathid = CAM_XPT_PATH_ID;
4171         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4172         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4173                 return (pathid);
4174         i = 0;
4175         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4176                 if (strcmp(dname, "scbus")) {
4177                         /* Avoid a bit of foot shooting. */
4178                         continue;
4179                 }
4180                 if (dunit < 0)          /* unwired?! */
4181                         continue;
4182                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4183                         if (sim_bus == val) {
4184                                 pathid = dunit;
4185                                 break;
4186                         }
4187                 } else if (sim_bus == 0) {
4188                         /* Unspecified matches bus 0 */
4189                         pathid = dunit;
4190                         break;
4191                 } else {
4192                         printf("Ambiguous scbus configuration for %s%d "
4193                                "bus %d, cannot wire down.  The kernel "
4194                                "config entry for scbus%d should "
4195                                "specify a controller bus.\n"
4196                                "Scbus will be assigned dynamically.\n",
4197                                sim_name, sim_unit, sim_bus, dunit);
4198                         break;
4199                 }
4200         }
4201
4202         if (pathid == CAM_XPT_PATH_ID)
4203                 pathid = xptnextfreepathid();
4204         return (pathid);
4205 }
4206
4207 static const char *
4208 xpt_async_string(u_int32_t async_code)
4209 {
4210
4211         switch (async_code) {
4212         case AC_BUS_RESET: return ("AC_BUS_RESET");
4213         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4214         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4215         case AC_SENT_BDR: return ("AC_SENT_BDR");
4216         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4217         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4218         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4219         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4220         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4221         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4222         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4223         case AC_CONTRACT: return ("AC_CONTRACT");
4224         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4225         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4226         }
4227         return ("AC_UNKNOWN");
4228 }
4229
4230 static int
4231 xpt_async_size(u_int32_t async_code)
4232 {
4233
4234         switch (async_code) {
4235         case AC_BUS_RESET: return (0);
4236         case AC_UNSOL_RESEL: return (0);
4237         case AC_SCSI_AEN: return (0);
4238         case AC_SENT_BDR: return (0);
4239         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4240         case AC_PATH_DEREGISTERED: return (0);
4241         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4242         case AC_LOST_DEVICE: return (0);
4243         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4244         case AC_INQ_CHANGED: return (0);
4245         case AC_GETDEV_CHANGED: return (0);
4246         case AC_CONTRACT: return (sizeof(struct ac_contract));
4247         case AC_ADVINFO_CHANGED: return (-1);
4248         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4249         }
4250         return (0);
4251 }
4252
4253 static int
4254 xpt_async_process_dev(struct cam_ed *device, void *arg)
4255 {
4256         union ccb *ccb = arg;
4257         struct cam_path *path = ccb->ccb_h.path;
4258         void *async_arg = ccb->casync.async_arg_ptr;
4259         u_int32_t async_code = ccb->casync.async_code;
4260         int relock;
4261
4262         if (path->device != device
4263          && path->device->lun_id != CAM_LUN_WILDCARD
4264          && device->lun_id != CAM_LUN_WILDCARD)
4265                 return (1);
4266
4267         /*
4268          * The async callback could free the device.
4269          * If it is a broadcast async, it doesn't hold
4270          * device reference, so take our own reference.
4271          */
4272         xpt_acquire_device(device);
4273
4274         /*
4275          * If async for specific device is to be delivered to
4276          * the wildcard client, take the specific device lock.
4277          * XXX: We may need a way for client to specify it.
4278          */
4279         if ((device->lun_id == CAM_LUN_WILDCARD &&
4280              path->device->lun_id != CAM_LUN_WILDCARD) ||
4281             (device->target->target_id == CAM_TARGET_WILDCARD &&
4282              path->target->target_id != CAM_TARGET_WILDCARD) ||
4283             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4284              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4285                 mtx_unlock(&device->device_mtx);
4286                 xpt_path_lock(path);
4287                 relock = 1;
4288         } else
4289                 relock = 0;
4290
4291         (*(device->target->bus->xport->ops->async))(async_code,
4292             device->target->bus, device->target, device, async_arg);
4293         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4294
4295         if (relock) {
4296                 xpt_path_unlock(path);
4297                 mtx_lock(&device->device_mtx);
4298         }
4299         xpt_release_device(device);
4300         return (1);
4301 }
4302
4303 static int
4304 xpt_async_process_tgt(struct cam_et *target, void *arg)
4305 {
4306         union ccb *ccb = arg;
4307         struct cam_path *path = ccb->ccb_h.path;
4308
4309         if (path->target != target
4310          && path->target->target_id != CAM_TARGET_WILDCARD
4311          && target->target_id != CAM_TARGET_WILDCARD)
4312                 return (1);
4313
4314         if (ccb->casync.async_code == AC_SENT_BDR) {
4315                 /* Update our notion of when the last reset occurred */
4316                 microtime(&target->last_reset);
4317         }
4318
4319         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4320 }
4321
4322 static void
4323 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4324 {
4325         struct cam_eb *bus;
4326         struct cam_path *path;
4327         void *async_arg;
4328         u_int32_t async_code;
4329
4330         path = ccb->ccb_h.path;
4331         async_code = ccb->casync.async_code;
4332         async_arg = ccb->casync.async_arg_ptr;
4333         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4334             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4335         bus = path->bus;
4336
4337         if (async_code == AC_BUS_RESET) {
4338                 /* Update our notion of when the last reset occurred */
4339                 microtime(&bus->last_reset);
4340         }
4341
4342         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4343
4344         /*
4345          * If this wasn't a fully wildcarded async, tell all
4346          * clients that want all async events.
4347          */
4348         if (bus != xpt_periph->path->bus) {
4349                 xpt_path_lock(xpt_periph->path);
4350                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4351                 xpt_path_unlock(xpt_periph->path);
4352         }
4353
4354         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4355                 xpt_release_devq(path, 1, TRUE);
4356         else
4357                 xpt_release_simq(path->bus->sim, TRUE);
4358         if (ccb->casync.async_arg_size > 0)
4359                 free(async_arg, M_CAMXPT);
4360         xpt_free_path(path);
4361         xpt_free_ccb(ccb);
4362 }
4363
4364 static void
4365 xpt_async_bcast(struct async_list *async_head,
4366                 u_int32_t async_code,
4367                 struct cam_path *path, void *async_arg)
4368 {
4369         struct async_node *cur_entry;
4370         struct mtx *mtx;
4371
4372         cur_entry = SLIST_FIRST(async_head);
4373         while (cur_entry != NULL) {
4374                 struct async_node *next_entry;
4375                 /*
4376                  * Grab the next list entry before we call the current
4377                  * entry's callback.  This is because the callback function
4378                  * can delete its async callback entry.
4379                  */
4380                 next_entry = SLIST_NEXT(cur_entry, links);
4381                 if ((cur_entry->event_enable & async_code) != 0) {
4382                         mtx = cur_entry->event_lock ?
4383                             path->device->sim->mtx : NULL;
4384                         if (mtx)
4385                                 mtx_lock(mtx);
4386                         cur_entry->callback(cur_entry->callback_arg,
4387                                             async_code, path,
4388                                             async_arg);
4389                         if (mtx)
4390                                 mtx_unlock(mtx);
4391                 }
4392                 cur_entry = next_entry;
4393         }
4394 }
4395
4396 void
4397 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4398 {
4399         union ccb *ccb;
4400         int size;
4401
4402         ccb = xpt_alloc_ccb_nowait();
4403         if (ccb == NULL) {
4404                 xpt_print(path, "Can't allocate CCB to send %s\n",
4405                     xpt_async_string(async_code));
4406                 return;
4407         }
4408
4409         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4410                 xpt_print(path, "Can't allocate path to send %s\n",
4411                     xpt_async_string(async_code));
4412                 xpt_free_ccb(ccb);
4413                 return;
4414         }
4415         ccb->ccb_h.path->periph = NULL;
4416         ccb->ccb_h.func_code = XPT_ASYNC;
4417         ccb->ccb_h.cbfcnp = xpt_async_process;
4418         ccb->ccb_h.flags |= CAM_UNLOCKED;
4419         ccb->casync.async_code = async_code;
4420         ccb->casync.async_arg_size = 0;
4421         size = xpt_async_size(async_code);
4422         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
4423             ("xpt_async: func %#x %s aync_code %d %s\n",
4424                 ccb->ccb_h.func_code,
4425                 xpt_action_name(ccb->ccb_h.func_code),
4426                 async_code,
4427                 xpt_async_string(async_code)));
4428         if (size > 0 && async_arg != NULL) {
4429                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4430                 if (ccb->casync.async_arg_ptr == NULL) {
4431                         xpt_print(path, "Can't allocate argument to send %s\n",
4432                             xpt_async_string(async_code));
4433                         xpt_free_path(ccb->ccb_h.path);
4434                         xpt_free_ccb(ccb);
4435                         return;
4436                 }
4437                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4438                 ccb->casync.async_arg_size = size;
4439         } else if (size < 0) {
4440                 ccb->casync.async_arg_ptr = async_arg;
4441                 ccb->casync.async_arg_size = size;
4442         }
4443         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4444                 xpt_freeze_devq(path, 1);
4445         else
4446                 xpt_freeze_simq(path->bus->sim, 1);
4447         xpt_done(ccb);
4448 }
4449
4450 static void
4451 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4452                       struct cam_et *target, struct cam_ed *device,
4453                       void *async_arg)
4454 {
4455
4456         /*
4457          * We only need to handle events for real devices.
4458          */
4459         if (target->target_id == CAM_TARGET_WILDCARD
4460          || device->lun_id == CAM_LUN_WILDCARD)
4461                 return;
4462
4463         printf("%s called\n", __func__);
4464 }
4465
4466 static uint32_t
4467 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4468 {
4469         struct cam_devq *devq;
4470         uint32_t freeze;
4471
4472         devq = dev->sim->devq;
4473         mtx_assert(&devq->send_mtx, MA_OWNED);
4474         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4475             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4476             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4477         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4478         /* Remove frozen device from sendq. */
4479         if (device_is_queued(dev))
4480                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4481         return (freeze);
4482 }
4483
4484 u_int32_t
4485 xpt_freeze_devq(struct cam_path *path, u_int count)
4486 {
4487         struct cam_ed   *dev = path->device;
4488         struct cam_devq *devq;
4489         uint32_t         freeze;
4490
4491         devq = dev->sim->devq;
4492         mtx_lock(&devq->send_mtx);
4493         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4494         freeze = xpt_freeze_devq_device(dev, count);
4495         mtx_unlock(&devq->send_mtx);
4496         return (freeze);
4497 }
4498
4499 u_int32_t
4500 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4501 {
4502         struct cam_devq *devq;
4503         uint32_t         freeze;
4504
4505         devq = sim->devq;
4506         mtx_lock(&devq->send_mtx);
4507         freeze = (devq->send_queue.qfrozen_cnt += count);
4508         mtx_unlock(&devq->send_mtx);
4509         return (freeze);
4510 }
4511
4512 static void
4513 xpt_release_devq_timeout(void *arg)
4514 {
4515         struct cam_ed *dev;
4516         struct cam_devq *devq;
4517
4518         dev = (struct cam_ed *)arg;
4519         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4520         devq = dev->sim->devq;
4521         mtx_assert(&devq->send_mtx, MA_OWNED);
4522         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4523                 xpt_run_devq(devq);
4524 }
4525
4526 void
4527 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4528 {
4529         struct cam_ed *dev;
4530         struct cam_devq *devq;
4531
4532         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4533             count, run_queue));
4534         dev = path->device;
4535         devq = dev->sim->devq;
4536         mtx_lock(&devq->send_mtx);
4537         if (xpt_release_devq_device(dev, count, run_queue))
4538                 xpt_run_devq(dev->sim->devq);
4539         mtx_unlock(&devq->send_mtx);
4540 }
4541
4542 static int
4543 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4544 {
4545
4546         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4547         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4548             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4549             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4550         if (count > dev->ccbq.queue.qfrozen_cnt) {
4551 #ifdef INVARIANTS
4552                 printf("xpt_release_devq(): requested %u > present %u\n",
4553                     count, dev->ccbq.queue.qfrozen_cnt);
4554 #endif
4555                 count = dev->ccbq.queue.qfrozen_cnt;
4556         }
4557         dev->ccbq.queue.qfrozen_cnt -= count;
4558         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4559                 /*
4560                  * No longer need to wait for a successful
4561                  * command completion.
4562                  */
4563                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4564                 /*
4565                  * Remove any timeouts that might be scheduled
4566                  * to release this queue.
4567                  */
4568                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4569                         callout_stop(&dev->callout);
4570                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4571                 }
4572                 /*
4573                  * Now that we are unfrozen schedule the
4574                  * device so any pending transactions are
4575                  * run.
4576                  */
4577                 xpt_schedule_devq(dev->sim->devq, dev);
4578         } else
4579                 run_queue = 0;
4580         return (run_queue);
4581 }
4582
4583 void
4584 xpt_release_simq(struct cam_sim *sim, int run_queue)
4585 {
4586         struct cam_devq *devq;
4587
4588         devq = sim->devq;
4589         mtx_lock(&devq->send_mtx);
4590         if (devq->send_queue.qfrozen_cnt <= 0) {
4591 #ifdef INVARIANTS
4592                 printf("xpt_release_simq: requested 1 > present %u\n",
4593                     devq->send_queue.qfrozen_cnt);
4594 #endif
4595         } else
4596                 devq->send_queue.qfrozen_cnt--;
4597         if (devq->send_queue.qfrozen_cnt == 0) {
4598                 /*
4599                  * If there is a timeout scheduled to release this
4600                  * sim queue, remove it.  The queue frozen count is
4601                  * already at 0.
4602                  */
4603                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4604                         callout_stop(&sim->callout);
4605                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4606                 }
4607                 if (run_queue) {
4608                         /*
4609                          * Now that we are unfrozen run the send queue.
4610                          */
4611                         xpt_run_devq(sim->devq);
4612                 }
4613         }
4614         mtx_unlock(&devq->send_mtx);
4615 }
4616
4617 /*
4618  * XXX Appears to be unused.
4619  */
4620 static void
4621 xpt_release_simq_timeout(void *arg)
4622 {
4623         struct cam_sim *sim;
4624
4625         sim = (struct cam_sim *)arg;
4626         xpt_release_simq(sim, /* run_queue */ TRUE);
4627 }
4628
4629 void
4630 xpt_done(union ccb *done_ccb)
4631 {
4632         struct cam_doneq *queue;
4633         int     run, hash;
4634
4635 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4636         if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4637             done_ccb->csio.bio != NULL)
4638                 biotrack(done_ccb->csio.bio, __func__);
4639 #endif
4640
4641         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4642             ("xpt_done: func= %#x %s status %#x\n",
4643                 done_ccb->ccb_h.func_code,
4644                 xpt_action_name(done_ccb->ccb_h.func_code),
4645                 done_ccb->ccb_h.status));
4646         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4647                 return;
4648
4649         /* Store the time the ccb was in the sim */
4650         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4651         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4652             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4653         queue = &cam_doneqs[hash];
4654         mtx_lock(&queue->cam_doneq_mtx);
4655         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4656         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4657         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4658         mtx_unlock(&queue->cam_doneq_mtx);
4659         if (run)
4660                 wakeup(&queue->cam_doneq);
4661 }
4662
4663 void
4664 xpt_done_direct(union ccb *done_ccb)
4665 {
4666
4667         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4668             ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4669         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4670                 return;
4671
4672         /* Store the time the ccb was in the sim */
4673         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4674         xpt_done_process(&done_ccb->ccb_h);
4675 }
4676
4677 union ccb *
4678 xpt_alloc_ccb()
4679 {
4680         union ccb *new_ccb;
4681
4682         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4683         return (new_ccb);
4684 }
4685
4686 union ccb *
4687 xpt_alloc_ccb_nowait()
4688 {
4689         union ccb *new_ccb;
4690
4691         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4692         return (new_ccb);
4693 }
4694
4695 void
4696 xpt_free_ccb(union ccb *free_ccb)
4697 {
4698         free(free_ccb, M_CAMCCB);
4699 }
4700
4701
4702
4703 /* Private XPT functions */
4704
4705 /*
4706  * Get a CAM control block for the caller. Charge the structure to the device
4707  * referenced by the path.  If we don't have sufficient resources to allocate
4708  * more ccbs, we return NULL.
4709  */
4710 static union ccb *
4711 xpt_get_ccb_nowait(struct cam_periph *periph)
4712 {
4713         union ccb *new_ccb;
4714
4715         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4716         if (new_ccb == NULL)
4717                 return (NULL);
4718         periph->periph_allocated++;
4719         cam_ccbq_take_opening(&periph->path->device->ccbq);
4720         return (new_ccb);
4721 }
4722
4723 static union ccb *
4724 xpt_get_ccb(struct cam_periph *periph)
4725 {
4726         union ccb *new_ccb;
4727
4728         cam_periph_unlock(periph);
4729         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4730         cam_periph_lock(periph);
4731         periph->periph_allocated++;
4732         cam_ccbq_take_opening(&periph->path->device->ccbq);
4733         return (new_ccb);
4734 }
4735
4736 union ccb *
4737 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4738 {
4739         struct ccb_hdr *ccb_h;
4740
4741         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4742         cam_periph_assert(periph, MA_OWNED);
4743         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4744             ccb_h->pinfo.priority != priority) {
4745                 if (priority < periph->immediate_priority) {
4746                         periph->immediate_priority = priority;
4747                         xpt_run_allocq(periph, 0);
4748                 } else
4749                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4750                             "cgticb", 0);
4751         }
4752         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4753         return ((union ccb *)ccb_h);
4754 }
4755
4756 static void
4757 xpt_acquire_bus(struct cam_eb *bus)
4758 {
4759
4760         xpt_lock_buses();
4761         bus->refcount++;
4762         xpt_unlock_buses();
4763 }
4764
4765 static void
4766 xpt_release_bus(struct cam_eb *bus)
4767 {
4768
4769         xpt_lock_buses();
4770         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4771         if (--bus->refcount > 0) {
4772                 xpt_unlock_buses();
4773                 return;
4774         }
4775         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4776         xsoftc.bus_generation++;
4777         xpt_unlock_buses();
4778         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4779             ("destroying bus, but target list is not empty"));
4780         cam_sim_release(bus->sim);
4781         mtx_destroy(&bus->eb_mtx);
4782         free(bus, M_CAMXPT);
4783 }
4784
4785 static struct cam_et *
4786 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4787 {
4788         struct cam_et *cur_target, *target;
4789
4790         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4791         mtx_assert(&bus->eb_mtx, MA_OWNED);
4792         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4793                                          M_NOWAIT|M_ZERO);
4794         if (target == NULL)
4795                 return (NULL);
4796
4797         TAILQ_INIT(&target->ed_entries);
4798         target->bus = bus;
4799         target->target_id = target_id;
4800         target->refcount = 1;
4801         target->generation = 0;
4802         target->luns = NULL;
4803         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4804         timevalclear(&target->last_reset);
4805         /*
4806          * Hold a reference to our parent bus so it
4807          * will not go away before we do.
4808          */
4809         bus->refcount++;
4810
4811         /* Insertion sort into our bus's target list */
4812         cur_target = TAILQ_FIRST(&bus->et_entries);
4813         while (cur_target != NULL && cur_target->target_id < target_id)
4814                 cur_target = TAILQ_NEXT(cur_target, links);
4815         if (cur_target != NULL) {
4816                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4817         } else {
4818                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4819         }
4820         bus->generation++;
4821         return (target);
4822 }
4823
4824 static void
4825 xpt_acquire_target(struct cam_et *target)
4826 {
4827         struct cam_eb *bus = target->bus;
4828
4829         mtx_lock(&bus->eb_mtx);
4830         target->refcount++;
4831         mtx_unlock(&bus->eb_mtx);
4832 }
4833
4834 static void
4835 xpt_release_target(struct cam_et *target)
4836 {
4837         struct cam_eb *bus = target->bus;
4838
4839         mtx_lock(&bus->eb_mtx);
4840         if (--target->refcount > 0) {
4841                 mtx_unlock(&bus->eb_mtx);
4842                 return;
4843         }
4844         TAILQ_REMOVE(&bus->et_entries, target, links);
4845         bus->generation++;
4846         mtx_unlock(&bus->eb_mtx);
4847         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4848             ("destroying target, but device list is not empty"));
4849         xpt_release_bus(bus);
4850         mtx_destroy(&target->luns_mtx);
4851         if (target->luns)
4852                 free(target->luns, M_CAMXPT);
4853         free(target, M_CAMXPT);
4854 }
4855
4856 static struct cam_ed *
4857 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4858                          lun_id_t lun_id)
4859 {
4860         struct cam_ed *device;
4861
4862         device = xpt_alloc_device(bus, target, lun_id);
4863         if (device == NULL)
4864                 return (NULL);
4865
4866         device->mintags = 1;
4867         device->maxtags = 1;
4868         return (device);
4869 }
4870
4871 static void
4872 xpt_destroy_device(void *context, int pending)
4873 {
4874         struct cam_ed   *device = context;
4875
4876         mtx_lock(&device->device_mtx);
4877         mtx_destroy(&device->device_mtx);
4878         free(device, M_CAMDEV);
4879 }
4880
4881 struct cam_ed *
4882 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4883 {
4884         struct cam_ed   *cur_device, *device;
4885         struct cam_devq *devq;
4886         cam_status status;
4887
4888         mtx_assert(&bus->eb_mtx, MA_OWNED);
4889         /* Make space for us in the device queue on our bus */
4890         devq = bus->sim->devq;
4891         mtx_lock(&devq->send_mtx);
4892         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4893         mtx_unlock(&devq->send_mtx);
4894         if (status != CAM_REQ_CMP)
4895                 return (NULL);
4896
4897         device = (struct cam_ed *)malloc(sizeof(*device),
4898                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4899         if (device == NULL)
4900                 return (NULL);
4901
4902         cam_init_pinfo(&device->devq_entry);
4903         device->target = target;
4904         device->lun_id = lun_id;
4905         device->sim = bus->sim;
4906         if (cam_ccbq_init(&device->ccbq,
4907                           bus->sim->max_dev_openings) != 0) {
4908                 free(device, M_CAMDEV);
4909                 return (NULL);
4910         }
4911         SLIST_INIT(&device->asyncs);
4912         SLIST_INIT(&device->periphs);
4913         device->generation = 0;
4914         device->flags = CAM_DEV_UNCONFIGURED;
4915         device->tag_delay_count = 0;
4916         device->tag_saved_openings = 0;
4917         device->refcount = 1;
4918         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4919         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4920         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4921         /*
4922          * Hold a reference to our parent bus so it
4923          * will not go away before we do.
4924          */
4925         target->refcount++;
4926
4927         cur_device = TAILQ_FIRST(&target->ed_entries);
4928         while (cur_device != NULL && cur_device->lun_id < lun_id)
4929                 cur_device = TAILQ_NEXT(cur_device, links);
4930         if (cur_device != NULL)
4931                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4932         else
4933                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4934         target->generation++;
4935         return (device);
4936 }
4937
4938 void
4939 xpt_acquire_device(struct cam_ed *device)
4940 {
4941         struct cam_eb *bus = device->target->bus;
4942
4943         mtx_lock(&bus->eb_mtx);
4944         device->refcount++;
4945         mtx_unlock(&bus->eb_mtx);
4946 }
4947
4948 void
4949 xpt_release_device(struct cam_ed *device)
4950 {
4951         struct cam_eb *bus = device->target->bus;
4952         struct cam_devq *devq;
4953
4954         mtx_lock(&bus->eb_mtx);
4955         if (--device->refcount > 0) {
4956                 mtx_unlock(&bus->eb_mtx);
4957                 return;
4958         }
4959
4960         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4961         device->target->generation++;
4962         mtx_unlock(&bus->eb_mtx);
4963
4964         /* Release our slot in the devq */
4965         devq = bus->sim->devq;
4966         mtx_lock(&devq->send_mtx);
4967         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4968         mtx_unlock(&devq->send_mtx);
4969
4970         KASSERT(SLIST_EMPTY(&device->periphs),
4971             ("destroying device, but periphs list is not empty"));
4972         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4973             ("destroying device while still queued for ccbs"));
4974
4975         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4976                 callout_stop(&device->callout);
4977
4978         xpt_release_target(device->target);
4979
4980         cam_ccbq_fini(&device->ccbq);
4981         /*
4982          * Free allocated memory.  free(9) does nothing if the
4983          * supplied pointer is NULL, so it is safe to call without
4984          * checking.
4985          */
4986         free(device->supported_vpds, M_CAMXPT);
4987         free(device->device_id, M_CAMXPT);
4988         free(device->ext_inq, M_CAMXPT);
4989         free(device->physpath, M_CAMXPT);
4990         free(device->rcap_buf, M_CAMXPT);
4991         free(device->serial_num, M_CAMXPT);
4992         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4993 }
4994
4995 u_int32_t
4996 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4997 {
4998         int     result;
4999         struct  cam_ed *dev;
5000
5001         dev = path->device;
5002         mtx_lock(&dev->sim->devq->send_mtx);
5003         result = cam_ccbq_resize(&dev->ccbq, newopenings);
5004         mtx_unlock(&dev->sim->devq->send_mtx);
5005         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5006          || (dev->inq_flags & SID_CmdQue) != 0)
5007                 dev->tag_saved_openings = newopenings;
5008         return (result);
5009 }
5010
5011 static struct cam_eb *
5012 xpt_find_bus(path_id_t path_id)
5013 {
5014         struct cam_eb *bus;
5015
5016         xpt_lock_buses();
5017         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
5018              bus != NULL;
5019              bus = TAILQ_NEXT(bus, links)) {
5020                 if (bus->path_id == path_id) {
5021                         bus->refcount++;
5022                         break;
5023                 }
5024         }
5025         xpt_unlock_buses();
5026         return (bus);
5027 }
5028
5029 static struct cam_et *
5030 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5031 {
5032         struct cam_et *target;
5033
5034         mtx_assert(&bus->eb_mtx, MA_OWNED);
5035         for (target = TAILQ_FIRST(&bus->et_entries);
5036              target != NULL;
5037              target = TAILQ_NEXT(target, links)) {
5038                 if (target->target_id == target_id) {
5039                         target->refcount++;
5040                         break;
5041                 }
5042         }
5043         return (target);
5044 }
5045
5046 static struct cam_ed *
5047 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5048 {
5049         struct cam_ed *device;
5050
5051         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
5052         for (device = TAILQ_FIRST(&target->ed_entries);
5053              device != NULL;
5054              device = TAILQ_NEXT(device, links)) {
5055                 if (device->lun_id == lun_id) {
5056                         device->refcount++;
5057                         break;
5058                 }
5059         }
5060         return (device);
5061 }
5062
5063 void
5064 xpt_start_tags(struct cam_path *path)
5065 {
5066         struct ccb_relsim crs;
5067         struct cam_ed *device;
5068         struct cam_sim *sim;
5069         int    newopenings;
5070
5071         device = path->device;
5072         sim = path->bus->sim;
5073         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5074         xpt_freeze_devq(path, /*count*/1);
5075         device->inq_flags |= SID_CmdQue;
5076         if (device->tag_saved_openings != 0)
5077                 newopenings = device->tag_saved_openings;
5078         else
5079                 newopenings = min(device->maxtags,
5080                                   sim->max_tagged_dev_openings);
5081         xpt_dev_ccbq_resize(path, newopenings);
5082         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5083         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5084         crs.ccb_h.func_code = XPT_REL_SIMQ;
5085         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5086         crs.openings
5087             = crs.release_timeout
5088             = crs.qfrozen_cnt
5089             = 0;
5090         xpt_action((union ccb *)&crs);
5091 }
5092
5093 void
5094 xpt_stop_tags(struct cam_path *path)
5095 {
5096         struct ccb_relsim crs;
5097         struct cam_ed *device;
5098         struct cam_sim *sim;
5099
5100         device = path->device;
5101         sim = path->bus->sim;
5102         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5103         device->tag_delay_count = 0;
5104         xpt_freeze_devq(path, /*count*/1);
5105         device->inq_flags &= ~SID_CmdQue;
5106         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
5107         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5108         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5109         crs.ccb_h.func_code = XPT_REL_SIMQ;
5110         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5111         crs.openings
5112             = crs.release_timeout
5113             = crs.qfrozen_cnt
5114             = 0;
5115         xpt_action((union ccb *)&crs);
5116 }
5117
5118 static void
5119 xpt_boot_delay(void *arg)
5120 {
5121
5122         xpt_release_boot();
5123 }
5124
5125 static void
5126 xpt_config(void *arg)
5127 {
5128         /*
5129          * Now that interrupts are enabled, go find our devices
5130          */
5131         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
5132                 printf("xpt_config: failed to create taskqueue thread.\n");
5133
5134         /* Setup debugging path */
5135         if (cam_dflags != CAM_DEBUG_NONE) {
5136                 if (xpt_create_path(&cam_dpath, NULL,
5137                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
5138                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
5139                         printf("xpt_config: xpt_create_path() failed for debug"
5140                                " target %d:%d:%d, debugging disabled\n",
5141                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
5142                         cam_dflags = CAM_DEBUG_NONE;
5143                 }
5144         } else
5145                 cam_dpath = NULL;
5146
5147         periphdriver_init(1);
5148         xpt_hold_boot();
5149         callout_init(&xsoftc.boot_callout, 1);
5150         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5151             xpt_boot_delay, NULL, 0);
5152         /* Fire up rescan thread. */
5153         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5154             "cam", "scanner")) {
5155                 printf("xpt_config: failed to create rescan thread.\n");
5156         }
5157 }
5158
5159 void
5160 xpt_hold_boot(void)
5161 {
5162         xpt_lock_buses();
5163         xsoftc.buses_to_config++;
5164         xpt_unlock_buses();
5165 }
5166
5167 void
5168 xpt_release_boot(void)
5169 {
5170         xpt_lock_buses();
5171         xsoftc.buses_to_config--;
5172         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
5173                 struct  xpt_task *task;
5174
5175                 xsoftc.buses_config_done = 1;
5176                 xpt_unlock_buses();
5177                 /* Call manually because we don't have any buses */
5178                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
5179                 if (task != NULL) {
5180                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
5181                         taskqueue_enqueue(taskqueue_thread, &task->task);
5182                 }
5183         } else
5184                 xpt_unlock_buses();
5185 }
5186
5187 /*
5188  * If the given device only has one peripheral attached to it, and if that
5189  * peripheral is the passthrough driver, announce it.  This insures that the
5190  * user sees some sort of announcement for every peripheral in their system.
5191  */
5192 static int
5193 xptpassannouncefunc(struct cam_ed *device, void *arg)
5194 {
5195         struct cam_periph *periph;
5196         int i;
5197
5198         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5199              periph = SLIST_NEXT(periph, periph_links), i++);
5200
5201         periph = SLIST_FIRST(&device->periphs);
5202         if ((i == 1)
5203          && (strncmp(periph->periph_name, "pass", 4) == 0))
5204                 xpt_announce_periph(periph, NULL);
5205
5206         return(1);
5207 }
5208
5209 static void
5210 xpt_finishconfig_task(void *context, int pending)
5211 {
5212
5213         periphdriver_init(2);
5214         /*
5215          * Check for devices with no "standard" peripheral driver
5216          * attached.  For any devices like that, announce the
5217          * passthrough driver so the user will see something.
5218          */
5219         if (!bootverbose)
5220                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5221
5222         /* Release our hook so that the boot can continue. */
5223         config_intrhook_disestablish(xsoftc.xpt_config_hook);
5224         free(xsoftc.xpt_config_hook, M_CAMXPT);
5225         xsoftc.xpt_config_hook = NULL;
5226
5227         free(context, M_CAMXPT);
5228 }
5229
5230 cam_status
5231 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5232                    struct cam_path *path)
5233 {
5234         struct ccb_setasync csa;
5235         cam_status status;
5236         int xptpath = 0;
5237
5238         if (path == NULL) {
5239                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5240                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5241                 if (status != CAM_REQ_CMP)
5242                         return (status);
5243                 xpt_path_lock(path);
5244                 xptpath = 1;
5245         }
5246
5247         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5248         csa.ccb_h.func_code = XPT_SASYNC_CB;
5249         csa.event_enable = event;
5250         csa.callback = cbfunc;
5251         csa.callback_arg = cbarg;
5252         xpt_action((union ccb *)&csa);
5253         status = csa.ccb_h.status;
5254
5255         CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5256             ("xpt_register_async: func %p\n", cbfunc));
5257
5258         if (xptpath) {
5259                 xpt_path_unlock(path);
5260                 xpt_free_path(path);
5261         }
5262
5263         if ((status == CAM_REQ_CMP) &&
5264             (csa.event_enable & AC_FOUND_DEVICE)) {
5265                 /*
5266                  * Get this peripheral up to date with all
5267                  * the currently existing devices.
5268                  */
5269                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5270         }
5271         if ((status == CAM_REQ_CMP) &&
5272             (csa.event_enable & AC_PATH_REGISTERED)) {
5273                 /*
5274                  * Get this peripheral up to date with all
5275                  * the currently existing buses.
5276                  */
5277                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5278         }
5279
5280         return (status);
5281 }
5282
5283 static void
5284 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5285 {
5286         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5287
5288         switch (work_ccb->ccb_h.func_code) {
5289         /* Common cases first */
5290         case XPT_PATH_INQ:              /* Path routing inquiry */
5291         {
5292                 struct ccb_pathinq *cpi;
5293
5294                 cpi = &work_ccb->cpi;
5295                 cpi->version_num = 1; /* XXX??? */
5296                 cpi->hba_inquiry = 0;
5297                 cpi->target_sprt = 0;
5298                 cpi->hba_misc = 0;
5299                 cpi->hba_eng_cnt = 0;
5300                 cpi->max_target = 0;
5301                 cpi->max_lun = 0;
5302                 cpi->initiator_id = 0;
5303                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5304                 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5305                 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5306                 cpi->unit_number = sim->unit_number;
5307                 cpi->bus_id = sim->bus_id;
5308                 cpi->base_transfer_speed = 0;
5309                 cpi->protocol = PROTO_UNSPECIFIED;
5310                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5311                 cpi->transport = XPORT_UNSPECIFIED;
5312                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5313                 cpi->ccb_h.status = CAM_REQ_CMP;
5314                 xpt_done(work_ccb);
5315                 break;
5316         }
5317         default:
5318                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5319                 xpt_done(work_ccb);
5320                 break;
5321         }
5322 }
5323
5324 /*
5325  * The xpt as a "controller" has no interrupt sources, so polling
5326  * is a no-op.
5327  */
5328 static void
5329 xptpoll(struct cam_sim *sim)
5330 {
5331 }
5332
5333 void
5334 xpt_lock_buses(void)
5335 {
5336         mtx_lock(&xsoftc.xpt_topo_lock);
5337 }
5338
5339 void
5340 xpt_unlock_buses(void)
5341 {
5342         mtx_unlock(&xsoftc.xpt_topo_lock);
5343 }
5344
5345 struct mtx *
5346 xpt_path_mtx(struct cam_path *path)
5347 {
5348
5349         return (&path->device->device_mtx);
5350 }
5351
5352 static void
5353 xpt_done_process(struct ccb_hdr *ccb_h)
5354 {
5355         struct cam_sim *sim;
5356         struct cam_devq *devq;
5357         struct mtx *mtx = NULL;
5358
5359 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5360         struct ccb_scsiio *csio;
5361
5362         if (ccb_h->func_code == XPT_SCSI_IO) {
5363                 csio = &((union ccb *)ccb_h)->csio;
5364                 if (csio->bio != NULL)
5365                         biotrack(csio->bio, __func__);
5366         }
5367 #endif
5368
5369         if (ccb_h->flags & CAM_HIGH_POWER) {
5370                 struct highpowerlist    *hphead;
5371                 struct cam_ed           *device;
5372
5373                 mtx_lock(&xsoftc.xpt_highpower_lock);
5374                 hphead = &xsoftc.highpowerq;
5375
5376                 device = STAILQ_FIRST(hphead);
5377
5378                 /*
5379                  * Increment the count since this command is done.
5380                  */
5381                 xsoftc.num_highpower++;
5382
5383                 /*
5384                  * Any high powered commands queued up?
5385                  */
5386                 if (device != NULL) {
5387
5388                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5389                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5390
5391                         mtx_lock(&device->sim->devq->send_mtx);
5392                         xpt_release_devq_device(device,
5393                                          /*count*/1, /*runqueue*/TRUE);
5394                         mtx_unlock(&device->sim->devq->send_mtx);
5395                 } else
5396                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5397         }
5398
5399         sim = ccb_h->path->bus->sim;
5400
5401         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5402                 xpt_release_simq(sim, /*run_queue*/FALSE);
5403                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5404         }
5405
5406         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5407          && (ccb_h->status & CAM_DEV_QFRZN)) {
5408                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5409                 ccb_h->status &= ~CAM_DEV_QFRZN;
5410         }
5411
5412         devq = sim->devq;
5413         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5414                 struct cam_ed *dev = ccb_h->path->device;
5415
5416                 mtx_lock(&devq->send_mtx);
5417                 devq->send_active--;
5418                 devq->send_openings++;
5419                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5420
5421                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5422                   && (dev->ccbq.dev_active == 0))) {
5423                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5424                         xpt_release_devq_device(dev, /*count*/1,
5425                                          /*run_queue*/FALSE);
5426                 }
5427
5428                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5429                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5430                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5431                         xpt_release_devq_device(dev, /*count*/1,
5432                                          /*run_queue*/FALSE);
5433                 }
5434
5435                 if (!device_is_queued(dev))
5436                         (void)xpt_schedule_devq(devq, dev);
5437                 xpt_run_devq(devq);
5438                 mtx_unlock(&devq->send_mtx);
5439
5440                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5441                         mtx = xpt_path_mtx(ccb_h->path);
5442                         mtx_lock(mtx);
5443
5444                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5445                          && (--dev->tag_delay_count == 0))
5446                                 xpt_start_tags(ccb_h->path);
5447                 }
5448         }
5449
5450         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5451                 if (mtx == NULL) {
5452                         mtx = xpt_path_mtx(ccb_h->path);
5453                         mtx_lock(mtx);
5454                 }
5455         } else {
5456                 if (mtx != NULL) {
5457                         mtx_unlock(mtx);
5458                         mtx = NULL;
5459                 }
5460         }
5461
5462         /* Call the peripheral driver's callback */
5463         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5464         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5465         if (mtx != NULL)
5466                 mtx_unlock(mtx);
5467 }
5468
5469 void
5470 xpt_done_td(void *arg)
5471 {
5472         struct cam_doneq *queue = arg;
5473         struct ccb_hdr *ccb_h;
5474         STAILQ_HEAD(, ccb_hdr)  doneq;
5475
5476         STAILQ_INIT(&doneq);
5477         mtx_lock(&queue->cam_doneq_mtx);
5478         while (1) {
5479                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5480                         queue->cam_doneq_sleep = 1;
5481                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5482                             PRIBIO, "-", 0);
5483                         queue->cam_doneq_sleep = 0;
5484                 }
5485                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5486                 mtx_unlock(&queue->cam_doneq_mtx);
5487
5488                 THREAD_NO_SLEEPING();
5489                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5490                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5491                         xpt_done_process(ccb_h);
5492                 }
5493                 THREAD_SLEEPING_OK();
5494
5495                 mtx_lock(&queue->cam_doneq_mtx);
5496         }
5497 }
5498
5499 static void
5500 camisr_runqueue(void)
5501 {
5502         struct  ccb_hdr *ccb_h;
5503         struct cam_doneq *queue;
5504         int i;
5505
5506         /* Process global queues. */
5507         for (i = 0; i < cam_num_doneqs; i++) {
5508                 queue = &cam_doneqs[i];
5509                 mtx_lock(&queue->cam_doneq_mtx);
5510                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5511                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5512                         mtx_unlock(&queue->cam_doneq_mtx);
5513                         xpt_done_process(ccb_h);
5514                         mtx_lock(&queue->cam_doneq_mtx);
5515                 }
5516                 mtx_unlock(&queue->cam_doneq_mtx);
5517         }
5518 }
5519
5520 struct kv
5521 {
5522         uint32_t v;
5523         const char *name;
5524 };
5525
5526 static struct kv map[] = {
5527         { XPT_NOOP, "XPT_NOOP" },
5528         { XPT_SCSI_IO, "XPT_SCSI_IO" },
5529         { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5530         { XPT_GDEVLIST, "XPT_GDEVLIST" },
5531         { XPT_PATH_INQ, "XPT_PATH_INQ" },
5532         { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5533         { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5534         { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5535         { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5536         { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5537         { XPT_DEBUG, "XPT_DEBUG" },
5538         { XPT_PATH_STATS, "XPT_PATH_STATS" },
5539         { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5540         { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5541         { XPT_ASYNC, "XPT_ASYNC" },
5542         { XPT_ABORT, "XPT_ABORT" },
5543         { XPT_RESET_BUS, "XPT_RESET_BUS" },
5544         { XPT_RESET_DEV, "XPT_RESET_DEV" },
5545         { XPT_TERM_IO, "XPT_TERM_IO" },
5546         { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5547         { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5548         { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5549         { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5550         { XPT_ATA_IO, "XPT_ATA_IO" },
5551         { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5552         { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5553         { XPT_NVME_IO, "XPT_NVME_IO" },
5554         { XPT_MMC_IO, "XPT_MMC_IO" },
5555         { XPT_SMP_IO, "XPT_SMP_IO" },
5556         { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5557         { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" },
5558         { XPT_ENG_INQ, "XPT_ENG_INQ" },
5559         { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5560         { XPT_EN_LUN, "XPT_EN_LUN" },
5561         { XPT_TARGET_IO, "XPT_TARGET_IO" },
5562         { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5563         { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5564         { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5565         { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5566         { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5567         { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5568         { 0, 0 }
5569 };
5570
5571 const char *
5572 xpt_action_name(uint32_t action)
5573 {
5574         static char buffer[32]; /* Only for unknown messages -- racy */
5575         struct kv *walker = map;
5576
5577         while (walker->name != NULL) {
5578                 if (walker->v == action)
5579                         return (walker->name);
5580                 walker++;
5581         }
5582
5583         snprintf(buffer, sizeof(buffer), "%#x", action);
5584         return (buffer);
5585 }