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_path_inq(&cpi, &path);
2624         csa->callback(csa->callback_arg,
2625                             AC_PATH_REGISTERED,
2626                             &path, &cpi);
2627         xpt_path_unlock(&path);
2628         xpt_release_path(&path);
2629
2630         return(1);
2631 }
2632
2633 void
2634 xpt_action(union ccb *start_ccb)
2635 {
2636
2637         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2638             ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2639                 xpt_action_name(start_ccb->ccb_h.func_code)));
2640
2641         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2642         (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb);
2643 }
2644
2645 void
2646 xpt_action_default(union ccb *start_ccb)
2647 {
2648         struct cam_path *path;
2649         struct cam_sim *sim;
2650         struct mtx *mtx;
2651
2652         path = start_ccb->ccb_h.path;
2653         CAM_DEBUG(path, CAM_DEBUG_TRACE,
2654             ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2655                 xpt_action_name(start_ccb->ccb_h.func_code)));
2656
2657         switch (start_ccb->ccb_h.func_code) {
2658         case XPT_SCSI_IO:
2659         {
2660                 struct cam_ed *device;
2661
2662                 /*
2663                  * For the sake of compatibility with SCSI-1
2664                  * devices that may not understand the identify
2665                  * message, we include lun information in the
2666                  * second byte of all commands.  SCSI-1 specifies
2667                  * that luns are a 3 bit value and reserves only 3
2668                  * bits for lun information in the CDB.  Later
2669                  * revisions of the SCSI spec allow for more than 8
2670                  * luns, but have deprecated lun information in the
2671                  * CDB.  So, if the lun won't fit, we must omit.
2672                  *
2673                  * Also be aware that during initial probing for devices,
2674                  * the inquiry information is unknown but initialized to 0.
2675                  * This means that this code will be exercised while probing
2676                  * devices with an ANSI revision greater than 2.
2677                  */
2678                 device = path->device;
2679                 if (device->protocol_version <= SCSI_REV_2
2680                  && start_ccb->ccb_h.target_lun < 8
2681                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2682
2683                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2684                             start_ccb->ccb_h.target_lun << 5;
2685                 }
2686                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2687         }
2688         /* FALLTHROUGH */
2689         case XPT_TARGET_IO:
2690         case XPT_CONT_TARGET_IO:
2691                 start_ccb->csio.sense_resid = 0;
2692                 start_ccb->csio.resid = 0;
2693                 /* FALLTHROUGH */
2694         case XPT_ATA_IO:
2695                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2696                         start_ccb->ataio.resid = 0;
2697                 /* FALLTHROUGH */
2698         case XPT_NVME_IO:
2699                 /* FALLTHROUGH */
2700         case XPT_NVME_ADMIN:
2701                 /* FALLTHROUGH */
2702         case XPT_MMC_IO:
2703                 /* XXX just like nmve_io? */
2704         case XPT_RESET_DEV:
2705         case XPT_ENG_EXEC:
2706         case XPT_SMP_IO:
2707         {
2708                 struct cam_devq *devq;
2709
2710                 devq = path->bus->sim->devq;
2711                 mtx_lock(&devq->send_mtx);
2712                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2713                 if (xpt_schedule_devq(devq, path->device) != 0)
2714                         xpt_run_devq(devq);
2715                 mtx_unlock(&devq->send_mtx);
2716                 break;
2717         }
2718         case XPT_CALC_GEOMETRY:
2719                 /* Filter out garbage */
2720                 if (start_ccb->ccg.block_size == 0
2721                  || start_ccb->ccg.volume_size == 0) {
2722                         start_ccb->ccg.cylinders = 0;
2723                         start_ccb->ccg.heads = 0;
2724                         start_ccb->ccg.secs_per_track = 0;
2725                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2726                         break;
2727                 }
2728 #if defined(__sparc64__)
2729                 /*
2730                  * For sparc64, we may need adjust the geometry of large
2731                  * disks in order to fit the limitations of the 16-bit
2732                  * fields of the VTOC8 disk label.
2733                  */
2734                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2735                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2736                         break;
2737                 }
2738 #endif
2739                 goto call_sim;
2740         case XPT_ABORT:
2741         {
2742                 union ccb* abort_ccb;
2743
2744                 abort_ccb = start_ccb->cab.abort_ccb;
2745                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2746                         struct cam_ed *device;
2747                         struct cam_devq *devq;
2748
2749                         device = abort_ccb->ccb_h.path->device;
2750                         devq = device->sim->devq;
2751
2752                         mtx_lock(&devq->send_mtx);
2753                         if (abort_ccb->ccb_h.pinfo.index > 0) {
2754                                 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb);
2755                                 abort_ccb->ccb_h.status =
2756                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2757                                 xpt_freeze_devq_device(device, 1);
2758                                 mtx_unlock(&devq->send_mtx);
2759                                 xpt_done(abort_ccb);
2760                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2761                                 break;
2762                         }
2763                         mtx_unlock(&devq->send_mtx);
2764
2765                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2766                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2767                                 /*
2768                                  * We've caught this ccb en route to
2769                                  * the SIM.  Flag it for abort and the
2770                                  * SIM will do so just before starting
2771                                  * real work on the CCB.
2772                                  */
2773                                 abort_ccb->ccb_h.status =
2774                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2775                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2776                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2777                                 break;
2778                         }
2779                 }
2780                 if (XPT_FC_IS_QUEUED(abort_ccb)
2781                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2782                         /*
2783                          * It's already completed but waiting
2784                          * for our SWI to get to it.
2785                          */
2786                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2787                         break;
2788                 }
2789                 /*
2790                  * If we weren't able to take care of the abort request
2791                  * in the XPT, pass the request down to the SIM for processing.
2792                  */
2793         }
2794         /* FALLTHROUGH */
2795         case XPT_ACCEPT_TARGET_IO:
2796         case XPT_EN_LUN:
2797         case XPT_IMMED_NOTIFY:
2798         case XPT_NOTIFY_ACK:
2799         case XPT_RESET_BUS:
2800         case XPT_IMMEDIATE_NOTIFY:
2801         case XPT_NOTIFY_ACKNOWLEDGE:
2802         case XPT_GET_SIM_KNOB_OLD:
2803         case XPT_GET_SIM_KNOB:
2804         case XPT_SET_SIM_KNOB:
2805         case XPT_GET_TRAN_SETTINGS:
2806         case XPT_SET_TRAN_SETTINGS:
2807         case XPT_PATH_INQ:
2808 call_sim:
2809                 sim = path->bus->sim;
2810                 mtx = sim->mtx;
2811                 if (mtx && !mtx_owned(mtx))
2812                         mtx_lock(mtx);
2813                 else
2814                         mtx = NULL;
2815
2816                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2817                     ("Calling sim->sim_action(): func=%#x\n", start_ccb->ccb_h.func_code));
2818                 (*(sim->sim_action))(sim, start_ccb);
2819                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2820                     ("sim->sim_action returned: status=%#x\n", start_ccb->ccb_h.status));
2821                 if (mtx)
2822                         mtx_unlock(mtx);
2823                 break;
2824         case XPT_PATH_STATS:
2825                 start_ccb->cpis.last_reset = path->bus->last_reset;
2826                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2827                 break;
2828         case XPT_GDEV_TYPE:
2829         {
2830                 struct cam_ed *dev;
2831
2832                 dev = path->device;
2833                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2834                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2835                 } else {
2836                         struct ccb_getdev *cgd;
2837
2838                         cgd = &start_ccb->cgd;
2839                         cgd->protocol = dev->protocol;
2840                         cgd->inq_data = dev->inq_data;
2841                         cgd->ident_data = dev->ident_data;
2842                         cgd->inq_flags = dev->inq_flags;
2843                         cgd->ccb_h.status = CAM_REQ_CMP;
2844                         cgd->serial_num_len = dev->serial_num_len;
2845                         if ((dev->serial_num_len > 0)
2846                          && (dev->serial_num != NULL))
2847                                 bcopy(dev->serial_num, cgd->serial_num,
2848                                       dev->serial_num_len);
2849                 }
2850                 break;
2851         }
2852         case XPT_GDEV_STATS:
2853         {
2854                 struct ccb_getdevstats *cgds = &start_ccb->cgds;
2855                 struct cam_ed *dev = path->device;
2856                 struct cam_eb *bus = path->bus;
2857                 struct cam_et *tar = path->target;
2858                 struct cam_devq *devq = bus->sim->devq;
2859
2860                 mtx_lock(&devq->send_mtx);
2861                 cgds->dev_openings = dev->ccbq.dev_openings;
2862                 cgds->dev_active = dev->ccbq.dev_active;
2863                 cgds->allocated = dev->ccbq.allocated;
2864                 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2865                 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued;
2866                 cgds->last_reset = tar->last_reset;
2867                 cgds->maxtags = dev->maxtags;
2868                 cgds->mintags = dev->mintags;
2869                 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2870                         cgds->last_reset = bus->last_reset;
2871                 mtx_unlock(&devq->send_mtx);
2872                 cgds->ccb_h.status = CAM_REQ_CMP;
2873                 break;
2874         }
2875         case XPT_GDEVLIST:
2876         {
2877                 struct cam_periph       *nperiph;
2878                 struct periph_list      *periph_head;
2879                 struct ccb_getdevlist   *cgdl;
2880                 u_int                   i;
2881                 struct cam_ed           *device;
2882                 int                     found;
2883
2884
2885                 found = 0;
2886
2887                 /*
2888                  * Don't want anyone mucking with our data.
2889                  */
2890                 device = path->device;
2891                 periph_head = &device->periphs;
2892                 cgdl = &start_ccb->cgdl;
2893
2894                 /*
2895                  * Check and see if the list has changed since the user
2896                  * last requested a list member.  If so, tell them that the
2897                  * list has changed, and therefore they need to start over
2898                  * from the beginning.
2899                  */
2900                 if ((cgdl->index != 0) &&
2901                     (cgdl->generation != device->generation)) {
2902                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2903                         break;
2904                 }
2905
2906                 /*
2907                  * Traverse the list of peripherals and attempt to find
2908                  * the requested peripheral.
2909                  */
2910                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2911                      (nperiph != NULL) && (i <= cgdl->index);
2912                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2913                         if (i == cgdl->index) {
2914                                 strlcpy(cgdl->periph_name,
2915                                         nperiph->periph_name,
2916                                         sizeof(cgdl->periph_name));
2917                                 cgdl->unit_number = nperiph->unit_number;
2918                                 found = 1;
2919                         }
2920                 }
2921                 if (found == 0) {
2922                         cgdl->status = CAM_GDEVLIST_ERROR;
2923                         break;
2924                 }
2925
2926                 if (nperiph == NULL)
2927                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2928                 else
2929                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2930
2931                 cgdl->index++;
2932                 cgdl->generation = device->generation;
2933
2934                 cgdl->ccb_h.status = CAM_REQ_CMP;
2935                 break;
2936         }
2937         case XPT_DEV_MATCH:
2938         {
2939                 dev_pos_type position_type;
2940                 struct ccb_dev_match *cdm;
2941
2942                 cdm = &start_ccb->cdm;
2943
2944                 /*
2945                  * There are two ways of getting at information in the EDT.
2946                  * The first way is via the primary EDT tree.  It starts
2947                  * with a list of buses, then a list of targets on a bus,
2948                  * then devices/luns on a target, and then peripherals on a
2949                  * device/lun.  The "other" way is by the peripheral driver
2950                  * lists.  The peripheral driver lists are organized by
2951                  * peripheral driver.  (obviously)  So it makes sense to
2952                  * use the peripheral driver list if the user is looking
2953                  * for something like "da1", or all "da" devices.  If the
2954                  * user is looking for something on a particular bus/target
2955                  * or lun, it's generally better to go through the EDT tree.
2956                  */
2957
2958                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2959                         position_type = cdm->pos.position_type;
2960                 else {
2961                         u_int i;
2962
2963                         position_type = CAM_DEV_POS_NONE;
2964
2965                         for (i = 0; i < cdm->num_patterns; i++) {
2966                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2967                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2968                                         position_type = CAM_DEV_POS_EDT;
2969                                         break;
2970                                 }
2971                         }
2972
2973                         if (cdm->num_patterns == 0)
2974                                 position_type = CAM_DEV_POS_EDT;
2975                         else if (position_type == CAM_DEV_POS_NONE)
2976                                 position_type = CAM_DEV_POS_PDRV;
2977                 }
2978
2979                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2980                 case CAM_DEV_POS_EDT:
2981                         xptedtmatch(cdm);
2982                         break;
2983                 case CAM_DEV_POS_PDRV:
2984                         xptperiphlistmatch(cdm);
2985                         break;
2986                 default:
2987                         cdm->status = CAM_DEV_MATCH_ERROR;
2988                         break;
2989                 }
2990
2991                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2992                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2993                 else
2994                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2995
2996                 break;
2997         }
2998         case XPT_SASYNC_CB:
2999         {
3000                 struct ccb_setasync *csa;
3001                 struct async_node *cur_entry;
3002                 struct async_list *async_head;
3003                 u_int32_t added;
3004
3005                 csa = &start_ccb->csa;
3006                 added = csa->event_enable;
3007                 async_head = &path->device->asyncs;
3008
3009                 /*
3010                  * If there is already an entry for us, simply
3011                  * update it.
3012                  */
3013                 cur_entry = SLIST_FIRST(async_head);
3014                 while (cur_entry != NULL) {
3015                         if ((cur_entry->callback_arg == csa->callback_arg)
3016                          && (cur_entry->callback == csa->callback))
3017                                 break;
3018                         cur_entry = SLIST_NEXT(cur_entry, links);
3019                 }
3020
3021                 if (cur_entry != NULL) {
3022                         /*
3023                          * If the request has no flags set,
3024                          * remove the entry.
3025                          */
3026                         added &= ~cur_entry->event_enable;
3027                         if (csa->event_enable == 0) {
3028                                 SLIST_REMOVE(async_head, cur_entry,
3029                                              async_node, links);
3030                                 xpt_release_device(path->device);
3031                                 free(cur_entry, M_CAMXPT);
3032                         } else {
3033                                 cur_entry->event_enable = csa->event_enable;
3034                         }
3035                         csa->event_enable = added;
3036                 } else {
3037                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3038                                            M_NOWAIT);
3039                         if (cur_entry == NULL) {
3040                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3041                                 break;
3042                         }
3043                         cur_entry->event_enable = csa->event_enable;
3044                         cur_entry->event_lock = (path->bus->sim->mtx &&
3045                             mtx_owned(path->bus->sim->mtx)) ? 1 : 0;
3046                         cur_entry->callback_arg = csa->callback_arg;
3047                         cur_entry->callback = csa->callback;
3048                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3049                         xpt_acquire_device(path->device);
3050                 }
3051                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3052                 break;
3053         }
3054         case XPT_REL_SIMQ:
3055         {
3056                 struct ccb_relsim *crs;
3057                 struct cam_ed *dev;
3058
3059                 crs = &start_ccb->crs;
3060                 dev = path->device;
3061                 if (dev == NULL) {
3062
3063                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3064                         break;
3065                 }
3066
3067                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3068
3069                         /* Don't ever go below one opening */
3070                         if (crs->openings > 0) {
3071                                 xpt_dev_ccbq_resize(path, crs->openings);
3072                                 if (bootverbose) {
3073                                         xpt_print(path,
3074                                             "number of openings is now %d\n",
3075                                             crs->openings);
3076                                 }
3077                         }
3078                 }
3079
3080                 mtx_lock(&dev->sim->devq->send_mtx);
3081                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3082
3083                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3084
3085                                 /*
3086                                  * Just extend the old timeout and decrement
3087                                  * the freeze count so that a single timeout
3088                                  * is sufficient for releasing the queue.
3089                                  */
3090                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3091                                 callout_stop(&dev->callout);
3092                         } else {
3093
3094                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3095                         }
3096
3097                         callout_reset_sbt(&dev->callout,
3098                             SBT_1MS * crs->release_timeout, 0,
3099                             xpt_release_devq_timeout, dev, 0);
3100
3101                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3102
3103                 }
3104
3105                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3106
3107                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3108                                 /*
3109                                  * Decrement the freeze count so that a single
3110                                  * completion is still sufficient to unfreeze
3111                                  * the queue.
3112                                  */
3113                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3114                         } else {
3115
3116                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3117                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3118                         }
3119                 }
3120
3121                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3122
3123                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3124                          || (dev->ccbq.dev_active == 0)) {
3125
3126                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3127                         } else {
3128
3129                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3130                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3131                         }
3132                 }
3133                 mtx_unlock(&dev->sim->devq->send_mtx);
3134
3135                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3136                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3137                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3138                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3139                 break;
3140         }
3141         case XPT_DEBUG: {
3142                 struct cam_path *oldpath;
3143
3144                 /* Check that all request bits are supported. */
3145                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3146                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3147                         break;
3148                 }
3149
3150                 cam_dflags = CAM_DEBUG_NONE;
3151                 if (cam_dpath != NULL) {
3152                         oldpath = cam_dpath;
3153                         cam_dpath = NULL;
3154                         xpt_free_path(oldpath);
3155                 }
3156                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3157                         if (xpt_create_path(&cam_dpath, NULL,
3158                                             start_ccb->ccb_h.path_id,
3159                                             start_ccb->ccb_h.target_id,
3160                                             start_ccb->ccb_h.target_lun) !=
3161                                             CAM_REQ_CMP) {
3162                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3163                         } else {
3164                                 cam_dflags = start_ccb->cdbg.flags;
3165                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3166                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3167                                     cam_dflags);
3168                         }
3169                 } else
3170                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3171                 break;
3172         }
3173         case XPT_NOOP:
3174                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3175                         xpt_freeze_devq(path, 1);
3176                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3177                 break;
3178         case XPT_REPROBE_LUN:
3179                 xpt_async(AC_INQ_CHANGED, path, NULL);
3180                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3181                 xpt_done(start_ccb);
3182                 break;
3183         default:
3184         case XPT_SDEV_TYPE:
3185         case XPT_TERM_IO:
3186         case XPT_ENG_INQ:
3187                 /* XXX Implement */
3188                 xpt_print(start_ccb->ccb_h.path,
3189                     "%s: CCB type %#x %s not supported\n", __func__,
3190                     start_ccb->ccb_h.func_code,
3191                     xpt_action_name(start_ccb->ccb_h.func_code));
3192                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3193                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3194                         xpt_done(start_ccb);
3195                 }
3196                 break;
3197         }
3198         CAM_DEBUG(path, CAM_DEBUG_TRACE,
3199             ("xpt_action_default: func= %#x %s status %#x\n",
3200                 start_ccb->ccb_h.func_code,
3201                 xpt_action_name(start_ccb->ccb_h.func_code),
3202                 start_ccb->ccb_h.status));
3203 }
3204
3205 uint32_t
3206 xpt_poll_setup(union ccb *start_ccb)
3207 {
3208         u_int32_t timeout;
3209         struct    cam_sim *sim;
3210         struct    cam_devq *devq;
3211         struct    cam_ed *dev;
3212         struct mtx *mtx;
3213
3214         timeout = start_ccb->ccb_h.timeout * 10;
3215         sim = start_ccb->ccb_h.path->bus->sim;
3216         devq = sim->devq;
3217         mtx = sim->mtx;
3218         dev = start_ccb->ccb_h.path->device;
3219
3220         /*
3221          * Steal an opening so that no other queued requests
3222          * can get it before us while we simulate interrupts.
3223          */
3224         mtx_lock(&devq->send_mtx);
3225         dev->ccbq.dev_openings--;
3226         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3227             (--timeout > 0)) {
3228                 mtx_unlock(&devq->send_mtx);
3229                 DELAY(100);
3230                 if (mtx)
3231                         mtx_lock(mtx);
3232                 (*(sim->sim_poll))(sim);
3233                 if (mtx)
3234                         mtx_unlock(mtx);
3235                 camisr_runqueue();
3236                 mtx_lock(&devq->send_mtx);
3237         }
3238         dev->ccbq.dev_openings++;
3239         mtx_unlock(&devq->send_mtx);
3240
3241         return (timeout);
3242 }
3243
3244 void
3245 xpt_pollwait(union ccb *start_ccb, uint32_t timeout)
3246 {
3247         struct cam_sim  *sim;
3248         struct mtx      *mtx;
3249
3250         sim = start_ccb->ccb_h.path->bus->sim;
3251         mtx = sim->mtx;
3252
3253         while (--timeout > 0) {
3254                 if (mtx)
3255                         mtx_lock(mtx);
3256                 (*(sim->sim_poll))(sim);
3257                 if (mtx)
3258                         mtx_unlock(mtx);
3259                 camisr_runqueue();
3260                 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3261                     != CAM_REQ_INPROG)
3262                         break;
3263                 DELAY(100);
3264         }
3265
3266         if (timeout == 0) {
3267                 /*
3268                  * XXX Is it worth adding a sim_timeout entry
3269                  * point so we can attempt recovery?  If
3270                  * this is only used for dumps, I don't think
3271                  * it is.
3272                  */
3273                 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3274         }
3275 }
3276
3277 void
3278 xpt_polled_action(union ccb *start_ccb)
3279 {
3280         uint32_t        timeout;
3281         struct cam_ed   *dev;
3282
3283         timeout = start_ccb->ccb_h.timeout * 10;
3284         dev = start_ccb->ccb_h.path->device;
3285
3286         mtx_unlock(&dev->device_mtx);
3287
3288         timeout = xpt_poll_setup(start_ccb);
3289         if (timeout > 0) {
3290                 xpt_action(start_ccb);
3291                 xpt_pollwait(start_ccb, timeout);
3292         } else {
3293                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3294         }
3295
3296         mtx_lock(&dev->device_mtx);
3297 }
3298
3299 /*
3300  * Schedule a peripheral driver to receive a ccb when its
3301  * target device has space for more transactions.
3302  */
3303 void
3304 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3305 {
3306
3307         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3308         cam_periph_assert(periph, MA_OWNED);
3309         if (new_priority < periph->scheduled_priority) {
3310                 periph->scheduled_priority = new_priority;
3311                 xpt_run_allocq(periph, 0);
3312         }
3313 }
3314
3315
3316 /*
3317  * Schedule a device to run on a given queue.
3318  * If the device was inserted as a new entry on the queue,
3319  * return 1 meaning the device queue should be run. If we
3320  * were already queued, implying someone else has already
3321  * started the queue, return 0 so the caller doesn't attempt
3322  * to run the queue.
3323  */
3324 static int
3325 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3326                  u_int32_t new_priority)
3327 {
3328         int retval;
3329         u_int32_t old_priority;
3330
3331         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3332
3333
3334         old_priority = pinfo->priority;
3335
3336         /*
3337          * Are we already queued?
3338          */
3339         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3340                 /* Simply reorder based on new priority */
3341                 if (new_priority < old_priority) {
3342                         camq_change_priority(queue, pinfo->index,
3343                                              new_priority);
3344                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3345                                         ("changed priority to %d\n",
3346                                          new_priority));
3347                         retval = 1;
3348                 } else
3349                         retval = 0;
3350         } else {
3351                 /* New entry on the queue */
3352                 if (new_priority < old_priority)
3353                         pinfo->priority = new_priority;
3354
3355                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3356                                 ("Inserting onto queue\n"));
3357                 pinfo->generation = ++queue->generation;
3358                 camq_insert(queue, pinfo);
3359                 retval = 1;
3360         }
3361         return (retval);
3362 }
3363
3364 static void
3365 xpt_run_allocq_task(void *context, int pending)
3366 {
3367         struct cam_periph *periph = context;
3368
3369         cam_periph_lock(periph);
3370         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3371         xpt_run_allocq(periph, 1);
3372         cam_periph_unlock(periph);
3373         cam_periph_release(periph);
3374 }
3375
3376 static void
3377 xpt_run_allocq(struct cam_periph *periph, int sleep)
3378 {
3379         struct cam_ed   *device;
3380         union ccb       *ccb;
3381         uint32_t         prio;
3382
3383         cam_periph_assert(periph, MA_OWNED);
3384         if (periph->periph_allocating)
3385                 return;
3386         periph->periph_allocating = 1;
3387         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3388         device = periph->path->device;
3389         ccb = NULL;
3390 restart:
3391         while ((prio = min(periph->scheduled_priority,
3392             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3393             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3394              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3395
3396                 if (ccb == NULL &&
3397                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3398                         if (sleep) {
3399                                 ccb = xpt_get_ccb(periph);
3400                                 goto restart;
3401                         }
3402                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3403                                 break;
3404                         cam_periph_doacquire(periph);
3405                         periph->flags |= CAM_PERIPH_RUN_TASK;
3406                         taskqueue_enqueue(xsoftc.xpt_taskq,
3407                             &periph->periph_run_task);
3408                         break;
3409                 }
3410                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3411                 if (prio == periph->immediate_priority) {
3412                         periph->immediate_priority = CAM_PRIORITY_NONE;
3413                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3414                                         ("waking cam_periph_getccb()\n"));
3415                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3416                                           periph_links.sle);
3417                         wakeup(&periph->ccb_list);
3418                 } else {
3419                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3420                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3421                                         ("calling periph_start()\n"));
3422                         periph->periph_start(periph, ccb);
3423                 }
3424                 ccb = NULL;
3425         }
3426         if (ccb != NULL)
3427                 xpt_release_ccb(ccb);
3428         periph->periph_allocating = 0;
3429 }
3430
3431 static void
3432 xpt_run_devq(struct cam_devq *devq)
3433 {
3434         struct mtx *mtx;
3435
3436         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3437
3438         devq->send_queue.qfrozen_cnt++;
3439         while ((devq->send_queue.entries > 0)
3440             && (devq->send_openings > 0)
3441             && (devq->send_queue.qfrozen_cnt <= 1)) {
3442                 struct  cam_ed *device;
3443                 union ccb *work_ccb;
3444                 struct  cam_sim *sim;
3445                 struct xpt_proto *proto;
3446
3447                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3448                                                            CAMQ_HEAD);
3449                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3450                                 ("running device %p\n", device));
3451
3452                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3453                 if (work_ccb == NULL) {
3454                         printf("device on run queue with no ccbs???\n");
3455                         continue;
3456                 }
3457
3458                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3459
3460                         mtx_lock(&xsoftc.xpt_highpower_lock);
3461                         if (xsoftc.num_highpower <= 0) {
3462                                 /*
3463                                  * We got a high power command, but we
3464                                  * don't have any available slots.  Freeze
3465                                  * the device queue until we have a slot
3466                                  * available.
3467                                  */
3468                                 xpt_freeze_devq_device(device, 1);
3469                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3470                                                    highpowerq_entry);
3471
3472                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3473                                 continue;
3474                         } else {
3475                                 /*
3476                                  * Consume a high power slot while
3477                                  * this ccb runs.
3478                                  */
3479                                 xsoftc.num_highpower--;
3480                         }
3481                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3482                 }
3483                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3484                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3485                 devq->send_openings--;
3486                 devq->send_active++;
3487                 xpt_schedule_devq(devq, device);
3488                 mtx_unlock(&devq->send_mtx);
3489
3490                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3491                         /*
3492                          * The client wants to freeze the queue
3493                          * after this CCB is sent.
3494                          */
3495                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3496                 }
3497
3498                 /* In Target mode, the peripheral driver knows best... */
3499                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3500                         if ((device->inq_flags & SID_CmdQue) != 0
3501                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3502                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3503                         else
3504                                 /*
3505                                  * Clear this in case of a retried CCB that
3506                                  * failed due to a rejected tag.
3507                                  */
3508                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3509                 }
3510
3511                 KASSERT(device == work_ccb->ccb_h.path->device,
3512                     ("device (%p) / path->device (%p) mismatch",
3513                         device, work_ccb->ccb_h.path->device));
3514                 proto = xpt_proto_find(device->protocol);
3515                 if (proto && proto->ops->debug_out)
3516                         proto->ops->debug_out(work_ccb);
3517
3518                 /*
3519                  * Device queues can be shared among multiple SIM instances
3520                  * that reside on different buses.  Use the SIM from the
3521                  * queued device, rather than the one from the calling bus.
3522                  */
3523                 sim = device->sim;
3524                 mtx = sim->mtx;
3525                 if (mtx && !mtx_owned(mtx))
3526                         mtx_lock(mtx);
3527                 else
3528                         mtx = NULL;
3529                 work_ccb->ccb_h.qos.periph_data = cam_iosched_now();
3530                 (*(sim->sim_action))(sim, work_ccb);
3531                 if (mtx)
3532                         mtx_unlock(mtx);
3533                 mtx_lock(&devq->send_mtx);
3534         }
3535         devq->send_queue.qfrozen_cnt--;
3536 }
3537
3538 /*
3539  * This function merges stuff from the slave ccb into the master ccb, while
3540  * keeping important fields in the master ccb constant.
3541  */
3542 void
3543 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3544 {
3545
3546         /*
3547          * Pull fields that are valid for peripheral drivers to set
3548          * into the master CCB along with the CCB "payload".
3549          */
3550         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3551         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3552         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3553         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3554         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3555               sizeof(union ccb) - sizeof(struct ccb_hdr));
3556 }
3557
3558 void
3559 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3560                     u_int32_t priority, u_int32_t flags)
3561 {
3562
3563         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3564         ccb_h->pinfo.priority = priority;
3565         ccb_h->path = path;
3566         ccb_h->path_id = path->bus->path_id;
3567         if (path->target)
3568                 ccb_h->target_id = path->target->target_id;
3569         else
3570                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3571         if (path->device) {
3572                 ccb_h->target_lun = path->device->lun_id;
3573                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3574         } else {
3575                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3576         }
3577         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3578         ccb_h->flags = flags;
3579         ccb_h->xflags = 0;
3580 }
3581
3582 void
3583 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3584 {
3585         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3586 }
3587
3588 /* Path manipulation functions */
3589 cam_status
3590 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3591                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3592 {
3593         struct     cam_path *path;
3594         cam_status status;
3595
3596         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3597
3598         if (path == NULL) {
3599                 status = CAM_RESRC_UNAVAIL;
3600                 return(status);
3601         }
3602         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3603         if (status != CAM_REQ_CMP) {
3604                 free(path, M_CAMPATH);
3605                 path = NULL;
3606         }
3607         *new_path_ptr = path;
3608         return (status);
3609 }
3610
3611 cam_status
3612 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3613                          struct cam_periph *periph, path_id_t path_id,
3614                          target_id_t target_id, lun_id_t lun_id)
3615 {
3616
3617         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3618             lun_id));
3619 }
3620
3621 cam_status
3622 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3623                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3624 {
3625         struct       cam_eb *bus;
3626         struct       cam_et *target;
3627         struct       cam_ed *device;
3628         cam_status   status;
3629
3630         status = CAM_REQ_CMP;   /* Completed without error */
3631         target = NULL;          /* Wildcarded */
3632         device = NULL;          /* Wildcarded */
3633
3634         /*
3635          * We will potentially modify the EDT, so block interrupts
3636          * that may attempt to create cam paths.
3637          */
3638         bus = xpt_find_bus(path_id);
3639         if (bus == NULL) {
3640                 status = CAM_PATH_INVALID;
3641         } else {
3642                 xpt_lock_buses();
3643                 mtx_lock(&bus->eb_mtx);
3644                 target = xpt_find_target(bus, target_id);
3645                 if (target == NULL) {
3646                         /* Create one */
3647                         struct cam_et *new_target;
3648
3649                         new_target = xpt_alloc_target(bus, target_id);
3650                         if (new_target == NULL) {
3651                                 status = CAM_RESRC_UNAVAIL;
3652                         } else {
3653                                 target = new_target;
3654                         }
3655                 }
3656                 xpt_unlock_buses();
3657                 if (target != NULL) {
3658                         device = xpt_find_device(target, lun_id);
3659                         if (device == NULL) {
3660                                 /* Create one */
3661                                 struct cam_ed *new_device;
3662
3663                                 new_device =
3664                                     (*(bus->xport->ops->alloc_device))(bus,
3665                                                                        target,
3666                                                                        lun_id);
3667                                 if (new_device == NULL) {
3668                                         status = CAM_RESRC_UNAVAIL;
3669                                 } else {
3670                                         device = new_device;
3671                                 }
3672                         }
3673                 }
3674                 mtx_unlock(&bus->eb_mtx);
3675         }
3676
3677         /*
3678          * Only touch the user's data if we are successful.
3679          */
3680         if (status == CAM_REQ_CMP) {
3681                 new_path->periph = perph;
3682                 new_path->bus = bus;
3683                 new_path->target = target;
3684                 new_path->device = device;
3685                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3686         } else {
3687                 if (device != NULL)
3688                         xpt_release_device(device);
3689                 if (target != NULL)
3690                         xpt_release_target(target);
3691                 if (bus != NULL)
3692                         xpt_release_bus(bus);
3693         }
3694         return (status);
3695 }
3696
3697 cam_status
3698 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3699 {
3700         struct     cam_path *new_path;
3701
3702         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3703         if (new_path == NULL)
3704                 return(CAM_RESRC_UNAVAIL);
3705         xpt_copy_path(new_path, path);
3706         *new_path_ptr = new_path;
3707         return (CAM_REQ_CMP);
3708 }
3709
3710 void
3711 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3712 {
3713
3714         *new_path = *path;
3715         if (path->bus != NULL)
3716                 xpt_acquire_bus(path->bus);
3717         if (path->target != NULL)
3718                 xpt_acquire_target(path->target);
3719         if (path->device != NULL)
3720                 xpt_acquire_device(path->device);
3721 }
3722
3723 void
3724 xpt_release_path(struct cam_path *path)
3725 {
3726         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3727         if (path->device != NULL) {
3728                 xpt_release_device(path->device);
3729                 path->device = NULL;
3730         }
3731         if (path->target != NULL) {
3732                 xpt_release_target(path->target);
3733                 path->target = NULL;
3734         }
3735         if (path->bus != NULL) {
3736                 xpt_release_bus(path->bus);
3737                 path->bus = NULL;
3738         }
3739 }
3740
3741 void
3742 xpt_free_path(struct cam_path *path)
3743 {
3744
3745         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3746         xpt_release_path(path);
3747         free(path, M_CAMPATH);
3748 }
3749
3750 void
3751 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3752     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3753 {
3754
3755         xpt_lock_buses();
3756         if (bus_ref) {
3757                 if (path->bus)
3758                         *bus_ref = path->bus->refcount;
3759                 else
3760                         *bus_ref = 0;
3761         }
3762         if (periph_ref) {
3763                 if (path->periph)
3764                         *periph_ref = path->periph->refcount;
3765                 else
3766                         *periph_ref = 0;
3767         }
3768         xpt_unlock_buses();
3769         if (target_ref) {
3770                 if (path->target)
3771                         *target_ref = path->target->refcount;
3772                 else
3773                         *target_ref = 0;
3774         }
3775         if (device_ref) {
3776                 if (path->device)
3777                         *device_ref = path->device->refcount;
3778                 else
3779                         *device_ref = 0;
3780         }
3781 }
3782
3783 /*
3784  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3785  * in path1, 2 for match with wildcards in path2.
3786  */
3787 int
3788 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3789 {
3790         int retval = 0;
3791
3792         if (path1->bus != path2->bus) {
3793                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3794                         retval = 1;
3795                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3796                         retval = 2;
3797                 else
3798                         return (-1);
3799         }
3800         if (path1->target != path2->target) {
3801                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3802                         if (retval == 0)
3803                                 retval = 1;
3804                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3805                         retval = 2;
3806                 else
3807                         return (-1);
3808         }
3809         if (path1->device != path2->device) {
3810                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3811                         if (retval == 0)
3812                                 retval = 1;
3813                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3814                         retval = 2;
3815                 else
3816                         return (-1);
3817         }
3818         return (retval);
3819 }
3820
3821 int
3822 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3823 {
3824         int retval = 0;
3825
3826         if (path->bus != dev->target->bus) {
3827                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3828                         retval = 1;
3829                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3830                         retval = 2;
3831                 else
3832                         return (-1);
3833         }
3834         if (path->target != dev->target) {
3835                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3836                         if (retval == 0)
3837                                 retval = 1;
3838                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3839                         retval = 2;
3840                 else
3841                         return (-1);
3842         }
3843         if (path->device != dev) {
3844                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3845                         if (retval == 0)
3846                                 retval = 1;
3847                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3848                         retval = 2;
3849                 else
3850                         return (-1);
3851         }
3852         return (retval);
3853 }
3854
3855 void
3856 xpt_print_path(struct cam_path *path)
3857 {
3858         struct sbuf sb;
3859         char buffer[XPT_PRINT_LEN];
3860
3861         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3862         xpt_path_sbuf(path, &sb);
3863         sbuf_finish(&sb);
3864         printf("%s", sbuf_data(&sb));
3865         sbuf_delete(&sb);
3866 }
3867
3868 void
3869 xpt_print_device(struct cam_ed *device)
3870 {
3871
3872         if (device == NULL)
3873                 printf("(nopath): ");
3874         else {
3875                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3876                        device->sim->unit_number,
3877                        device->sim->bus_id,
3878                        device->target->target_id,
3879                        (uintmax_t)device->lun_id);
3880         }
3881 }
3882
3883 void
3884 xpt_print(struct cam_path *path, const char *fmt, ...)
3885 {
3886         va_list ap;
3887         struct sbuf sb;
3888         char buffer[XPT_PRINT_LEN];
3889
3890         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3891
3892         xpt_path_sbuf(path, &sb);
3893         va_start(ap, fmt);
3894         sbuf_vprintf(&sb, fmt, ap);
3895         va_end(ap);
3896
3897         sbuf_finish(&sb);
3898         printf("%s", sbuf_data(&sb));
3899         sbuf_delete(&sb);
3900 }
3901
3902 int
3903 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3904 {
3905         struct sbuf sb;
3906         int len;
3907
3908         sbuf_new(&sb, str, str_len, 0);
3909         len = xpt_path_sbuf(path, &sb);
3910         sbuf_finish(&sb);
3911         return (len);
3912 }
3913
3914 int
3915 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb)
3916 {
3917
3918         if (path == NULL)
3919                 sbuf_printf(sb, "(nopath): ");
3920         else {
3921                 if (path->periph != NULL)
3922                         sbuf_printf(sb, "(%s%d:", path->periph->periph_name,
3923                                     path->periph->unit_number);
3924                 else
3925                         sbuf_printf(sb, "(noperiph:");
3926
3927                 if (path->bus != NULL)
3928                         sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name,
3929                                     path->bus->sim->unit_number,
3930                                     path->bus->sim->bus_id);
3931                 else
3932                         sbuf_printf(sb, "nobus:");
3933
3934                 if (path->target != NULL)
3935                         sbuf_printf(sb, "%d:", path->target->target_id);
3936                 else
3937                         sbuf_printf(sb, "X:");
3938
3939                 if (path->device != NULL)
3940                         sbuf_printf(sb, "%jx): ",
3941                             (uintmax_t)path->device->lun_id);
3942                 else
3943                         sbuf_printf(sb, "X): ");
3944         }
3945
3946         return(sbuf_len(sb));
3947 }
3948
3949 path_id_t
3950 xpt_path_path_id(struct cam_path *path)
3951 {
3952         return(path->bus->path_id);
3953 }
3954
3955 target_id_t
3956 xpt_path_target_id(struct cam_path *path)
3957 {
3958         if (path->target != NULL)
3959                 return (path->target->target_id);
3960         else
3961                 return (CAM_TARGET_WILDCARD);
3962 }
3963
3964 lun_id_t
3965 xpt_path_lun_id(struct cam_path *path)
3966 {
3967         if (path->device != NULL)
3968                 return (path->device->lun_id);
3969         else
3970                 return (CAM_LUN_WILDCARD);
3971 }
3972
3973 struct cam_sim *
3974 xpt_path_sim(struct cam_path *path)
3975 {
3976
3977         return (path->bus->sim);
3978 }
3979
3980 struct cam_periph*
3981 xpt_path_periph(struct cam_path *path)
3982 {
3983
3984         return (path->periph);
3985 }
3986
3987 /*
3988  * Release a CAM control block for the caller.  Remit the cost of the structure
3989  * to the device referenced by the path.  If the this device had no 'credits'
3990  * and peripheral drivers have registered async callbacks for this notification
3991  * call them now.
3992  */
3993 void
3994 xpt_release_ccb(union ccb *free_ccb)
3995 {
3996         struct   cam_ed *device;
3997         struct   cam_periph *periph;
3998
3999         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
4000         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
4001         device = free_ccb->ccb_h.path->device;
4002         periph = free_ccb->ccb_h.path->periph;
4003
4004         xpt_free_ccb(free_ccb);
4005         periph->periph_allocated--;
4006         cam_ccbq_release_opening(&device->ccbq);
4007         xpt_run_allocq(periph, 0);
4008 }
4009
4010 /* Functions accessed by SIM drivers */
4011
4012 static struct xpt_xport_ops xport_default_ops = {
4013         .alloc_device = xpt_alloc_device_default,
4014         .action = xpt_action_default,
4015         .async = xpt_dev_async_default,
4016 };
4017 static struct xpt_xport xport_default = {
4018         .xport = XPORT_UNKNOWN,
4019         .name = "unknown",
4020         .ops = &xport_default_ops,
4021 };
4022
4023 CAM_XPT_XPORT(xport_default);
4024
4025 /*
4026  * A sim structure, listing the SIM entry points and instance
4027  * identification info is passed to xpt_bus_register to hook the SIM
4028  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
4029  * for this new bus and places it in the array of buses and assigns
4030  * it a path_id.  The path_id may be influenced by "hard wiring"
4031  * information specified by the user.  Once interrupt services are
4032  * available, the bus will be probed.
4033  */
4034 int32_t
4035 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
4036 {
4037         struct cam_eb *new_bus;
4038         struct cam_eb *old_bus;
4039         struct ccb_pathinq cpi;
4040         struct cam_path *path;
4041         cam_status status;
4042
4043         sim->bus_id = bus;
4044         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4045                                           M_CAMXPT, M_NOWAIT|M_ZERO);
4046         if (new_bus == NULL) {
4047                 /* Couldn't satisfy request */
4048                 return (CAM_RESRC_UNAVAIL);
4049         }
4050
4051         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
4052         TAILQ_INIT(&new_bus->et_entries);
4053         cam_sim_hold(sim);
4054         new_bus->sim = sim;
4055         timevalclear(&new_bus->last_reset);
4056         new_bus->flags = 0;
4057         new_bus->refcount = 1;  /* Held until a bus_deregister event */
4058         new_bus->generation = 0;
4059
4060         xpt_lock_buses();
4061         sim->path_id = new_bus->path_id =
4062             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4063         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4064         while (old_bus != NULL
4065             && old_bus->path_id < new_bus->path_id)
4066                 old_bus = TAILQ_NEXT(old_bus, links);
4067         if (old_bus != NULL)
4068                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4069         else
4070                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
4071         xsoftc.bus_generation++;
4072         xpt_unlock_buses();
4073
4074         /*
4075          * Set a default transport so that a PATH_INQ can be issued to
4076          * the SIM.  This will then allow for probing and attaching of
4077          * a more appropriate transport.
4078          */
4079         new_bus->xport = &xport_default;
4080
4081         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
4082                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4083         if (status != CAM_REQ_CMP) {
4084                 xpt_release_bus(new_bus);
4085                 return (CAM_RESRC_UNAVAIL);
4086         }
4087
4088         xpt_path_inq(&cpi, path);
4089
4090         if (cpi.ccb_h.status == CAM_REQ_CMP) {
4091                 struct xpt_xport **xpt;
4092
4093                 SET_FOREACH(xpt, cam_xpt_xport_set) {
4094                         if ((*xpt)->xport == cpi.transport) {
4095                                 new_bus->xport = *xpt;
4096                                 break;
4097                         }
4098                 }
4099                 if (new_bus->xport == NULL) {
4100                         xpt_print(path,
4101                             "No transport found for %d\n", cpi.transport);
4102                         xpt_release_bus(new_bus);
4103                         free(path, M_CAMXPT);
4104                         return (CAM_RESRC_UNAVAIL);
4105                 }
4106         }
4107
4108         /* Notify interested parties */
4109         if (sim->path_id != CAM_XPT_PATH_ID) {
4110
4111                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
4112                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
4113                         union   ccb *scan_ccb;
4114
4115                         /* Initiate bus rescan. */
4116                         scan_ccb = xpt_alloc_ccb_nowait();
4117                         if (scan_ccb != NULL) {
4118                                 scan_ccb->ccb_h.path = path;
4119                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
4120                                 scan_ccb->crcn.flags = 0;
4121                                 xpt_rescan(scan_ccb);
4122                         } else {
4123                                 xpt_print(path,
4124                                           "Can't allocate CCB to scan bus\n");
4125                                 xpt_free_path(path);
4126                         }
4127                 } else
4128                         xpt_free_path(path);
4129         } else
4130                 xpt_free_path(path);
4131         return (CAM_SUCCESS);
4132 }
4133
4134 int32_t
4135 xpt_bus_deregister(path_id_t pathid)
4136 {
4137         struct cam_path bus_path;
4138         cam_status status;
4139
4140         status = xpt_compile_path(&bus_path, NULL, pathid,
4141                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4142         if (status != CAM_REQ_CMP)
4143                 return (status);
4144
4145         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4146         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4147
4148         /* Release the reference count held while registered. */
4149         xpt_release_bus(bus_path.bus);
4150         xpt_release_path(&bus_path);
4151
4152         return (CAM_REQ_CMP);
4153 }
4154
4155 static path_id_t
4156 xptnextfreepathid(void)
4157 {
4158         struct cam_eb *bus;
4159         path_id_t pathid;
4160         const char *strval;
4161
4162         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4163         pathid = 0;
4164         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4165 retry:
4166         /* Find an unoccupied pathid */
4167         while (bus != NULL && bus->path_id <= pathid) {
4168                 if (bus->path_id == pathid)
4169                         pathid++;
4170                 bus = TAILQ_NEXT(bus, links);
4171         }
4172
4173         /*
4174          * Ensure that this pathid is not reserved for
4175          * a bus that may be registered in the future.
4176          */
4177         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4178                 ++pathid;
4179                 /* Start the search over */
4180                 goto retry;
4181         }
4182         return (pathid);
4183 }
4184
4185 static path_id_t
4186 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4187 {
4188         path_id_t pathid;
4189         int i, dunit, val;
4190         char buf[32];
4191         const char *dname;
4192
4193         pathid = CAM_XPT_PATH_ID;
4194         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4195         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4196                 return (pathid);
4197         i = 0;
4198         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4199                 if (strcmp(dname, "scbus")) {
4200                         /* Avoid a bit of foot shooting. */
4201                         continue;
4202                 }
4203                 if (dunit < 0)          /* unwired?! */
4204                         continue;
4205                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4206                         if (sim_bus == val) {
4207                                 pathid = dunit;
4208                                 break;
4209                         }
4210                 } else if (sim_bus == 0) {
4211                         /* Unspecified matches bus 0 */
4212                         pathid = dunit;
4213                         break;
4214                 } else {
4215                         printf("Ambiguous scbus configuration for %s%d "
4216                                "bus %d, cannot wire down.  The kernel "
4217                                "config entry for scbus%d should "
4218                                "specify a controller bus.\n"
4219                                "Scbus will be assigned dynamically.\n",
4220                                sim_name, sim_unit, sim_bus, dunit);
4221                         break;
4222                 }
4223         }
4224
4225         if (pathid == CAM_XPT_PATH_ID)
4226                 pathid = xptnextfreepathid();
4227         return (pathid);
4228 }
4229
4230 static const char *
4231 xpt_async_string(u_int32_t async_code)
4232 {
4233
4234         switch (async_code) {
4235         case AC_BUS_RESET: return ("AC_BUS_RESET");
4236         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4237         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4238         case AC_SENT_BDR: return ("AC_SENT_BDR");
4239         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4240         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4241         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4242         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4243         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4244         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4245         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4246         case AC_CONTRACT: return ("AC_CONTRACT");
4247         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4248         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4249         }
4250         return ("AC_UNKNOWN");
4251 }
4252
4253 static int
4254 xpt_async_size(u_int32_t async_code)
4255 {
4256
4257         switch (async_code) {
4258         case AC_BUS_RESET: return (0);
4259         case AC_UNSOL_RESEL: return (0);
4260         case AC_SCSI_AEN: return (0);
4261         case AC_SENT_BDR: return (0);
4262         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4263         case AC_PATH_DEREGISTERED: return (0);
4264         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4265         case AC_LOST_DEVICE: return (0);
4266         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4267         case AC_INQ_CHANGED: return (0);
4268         case AC_GETDEV_CHANGED: return (0);
4269         case AC_CONTRACT: return (sizeof(struct ac_contract));
4270         case AC_ADVINFO_CHANGED: return (-1);
4271         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4272         }
4273         return (0);
4274 }
4275
4276 static int
4277 xpt_async_process_dev(struct cam_ed *device, void *arg)
4278 {
4279         union ccb *ccb = arg;
4280         struct cam_path *path = ccb->ccb_h.path;
4281         void *async_arg = ccb->casync.async_arg_ptr;
4282         u_int32_t async_code = ccb->casync.async_code;
4283         int relock;
4284
4285         if (path->device != device
4286          && path->device->lun_id != CAM_LUN_WILDCARD
4287          && device->lun_id != CAM_LUN_WILDCARD)
4288                 return (1);
4289
4290         /*
4291          * The async callback could free the device.
4292          * If it is a broadcast async, it doesn't hold
4293          * device reference, so take our own reference.
4294          */
4295         xpt_acquire_device(device);
4296
4297         /*
4298          * If async for specific device is to be delivered to
4299          * the wildcard client, take the specific device lock.
4300          * XXX: We may need a way for client to specify it.
4301          */
4302         if ((device->lun_id == CAM_LUN_WILDCARD &&
4303              path->device->lun_id != CAM_LUN_WILDCARD) ||
4304             (device->target->target_id == CAM_TARGET_WILDCARD &&
4305              path->target->target_id != CAM_TARGET_WILDCARD) ||
4306             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4307              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4308                 mtx_unlock(&device->device_mtx);
4309                 xpt_path_lock(path);
4310                 relock = 1;
4311         } else
4312                 relock = 0;
4313
4314         (*(device->target->bus->xport->ops->async))(async_code,
4315             device->target->bus, device->target, device, async_arg);
4316         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4317
4318         if (relock) {
4319                 xpt_path_unlock(path);
4320                 mtx_lock(&device->device_mtx);
4321         }
4322         xpt_release_device(device);
4323         return (1);
4324 }
4325
4326 static int
4327 xpt_async_process_tgt(struct cam_et *target, void *arg)
4328 {
4329         union ccb *ccb = arg;
4330         struct cam_path *path = ccb->ccb_h.path;
4331
4332         if (path->target != target
4333          && path->target->target_id != CAM_TARGET_WILDCARD
4334          && target->target_id != CAM_TARGET_WILDCARD)
4335                 return (1);
4336
4337         if (ccb->casync.async_code == AC_SENT_BDR) {
4338                 /* Update our notion of when the last reset occurred */
4339                 microtime(&target->last_reset);
4340         }
4341
4342         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4343 }
4344
4345 static void
4346 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4347 {
4348         struct cam_eb *bus;
4349         struct cam_path *path;
4350         void *async_arg;
4351         u_int32_t async_code;
4352
4353         path = ccb->ccb_h.path;
4354         async_code = ccb->casync.async_code;
4355         async_arg = ccb->casync.async_arg_ptr;
4356         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4357             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4358         bus = path->bus;
4359
4360         if (async_code == AC_BUS_RESET) {
4361                 /* Update our notion of when the last reset occurred */
4362                 microtime(&bus->last_reset);
4363         }
4364
4365         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4366
4367         /*
4368          * If this wasn't a fully wildcarded async, tell all
4369          * clients that want all async events.
4370          */
4371         if (bus != xpt_periph->path->bus) {
4372                 xpt_path_lock(xpt_periph->path);
4373                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4374                 xpt_path_unlock(xpt_periph->path);
4375         }
4376
4377         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4378                 xpt_release_devq(path, 1, TRUE);
4379         else
4380                 xpt_release_simq(path->bus->sim, TRUE);
4381         if (ccb->casync.async_arg_size > 0)
4382                 free(async_arg, M_CAMXPT);
4383         xpt_free_path(path);
4384         xpt_free_ccb(ccb);
4385 }
4386
4387 static void
4388 xpt_async_bcast(struct async_list *async_head,
4389                 u_int32_t async_code,
4390                 struct cam_path *path, void *async_arg)
4391 {
4392         struct async_node *cur_entry;
4393         struct mtx *mtx;
4394
4395         cur_entry = SLIST_FIRST(async_head);
4396         while (cur_entry != NULL) {
4397                 struct async_node *next_entry;
4398                 /*
4399                  * Grab the next list entry before we call the current
4400                  * entry's callback.  This is because the callback function
4401                  * can delete its async callback entry.
4402                  */
4403                 next_entry = SLIST_NEXT(cur_entry, links);
4404                 if ((cur_entry->event_enable & async_code) != 0) {
4405                         mtx = cur_entry->event_lock ?
4406                             path->device->sim->mtx : NULL;
4407                         if (mtx)
4408                                 mtx_lock(mtx);
4409                         cur_entry->callback(cur_entry->callback_arg,
4410                                             async_code, path,
4411                                             async_arg);
4412                         if (mtx)
4413                                 mtx_unlock(mtx);
4414                 }
4415                 cur_entry = next_entry;
4416         }
4417 }
4418
4419 void
4420 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4421 {
4422         union ccb *ccb;
4423         int size;
4424
4425         ccb = xpt_alloc_ccb_nowait();
4426         if (ccb == NULL) {
4427                 xpt_print(path, "Can't allocate CCB to send %s\n",
4428                     xpt_async_string(async_code));
4429                 return;
4430         }
4431
4432         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4433                 xpt_print(path, "Can't allocate path to send %s\n",
4434                     xpt_async_string(async_code));
4435                 xpt_free_ccb(ccb);
4436                 return;
4437         }
4438         ccb->ccb_h.path->periph = NULL;
4439         ccb->ccb_h.func_code = XPT_ASYNC;
4440         ccb->ccb_h.cbfcnp = xpt_async_process;
4441         ccb->ccb_h.flags |= CAM_UNLOCKED;
4442         ccb->casync.async_code = async_code;
4443         ccb->casync.async_arg_size = 0;
4444         size = xpt_async_size(async_code);
4445         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
4446             ("xpt_async: func %#x %s aync_code %d %s\n",
4447                 ccb->ccb_h.func_code,
4448                 xpt_action_name(ccb->ccb_h.func_code),
4449                 async_code,
4450                 xpt_async_string(async_code)));
4451         if (size > 0 && async_arg != NULL) {
4452                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4453                 if (ccb->casync.async_arg_ptr == NULL) {
4454                         xpt_print(path, "Can't allocate argument to send %s\n",
4455                             xpt_async_string(async_code));
4456                         xpt_free_path(ccb->ccb_h.path);
4457                         xpt_free_ccb(ccb);
4458                         return;
4459                 }
4460                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4461                 ccb->casync.async_arg_size = size;
4462         } else if (size < 0) {
4463                 ccb->casync.async_arg_ptr = async_arg;
4464                 ccb->casync.async_arg_size = size;
4465         }
4466         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4467                 xpt_freeze_devq(path, 1);
4468         else
4469                 xpt_freeze_simq(path->bus->sim, 1);
4470         xpt_done(ccb);
4471 }
4472
4473 static void
4474 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4475                       struct cam_et *target, struct cam_ed *device,
4476                       void *async_arg)
4477 {
4478
4479         /*
4480          * We only need to handle events for real devices.
4481          */
4482         if (target->target_id == CAM_TARGET_WILDCARD
4483          || device->lun_id == CAM_LUN_WILDCARD)
4484                 return;
4485
4486         printf("%s called\n", __func__);
4487 }
4488
4489 static uint32_t
4490 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4491 {
4492         struct cam_devq *devq;
4493         uint32_t freeze;
4494
4495         devq = dev->sim->devq;
4496         mtx_assert(&devq->send_mtx, MA_OWNED);
4497         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4498             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4499             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4500         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4501         /* Remove frozen device from sendq. */
4502         if (device_is_queued(dev))
4503                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4504         return (freeze);
4505 }
4506
4507 u_int32_t
4508 xpt_freeze_devq(struct cam_path *path, u_int count)
4509 {
4510         struct cam_ed   *dev = path->device;
4511         struct cam_devq *devq;
4512         uint32_t         freeze;
4513
4514         devq = dev->sim->devq;
4515         mtx_lock(&devq->send_mtx);
4516         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4517         freeze = xpt_freeze_devq_device(dev, count);
4518         mtx_unlock(&devq->send_mtx);
4519         return (freeze);
4520 }
4521
4522 u_int32_t
4523 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4524 {
4525         struct cam_devq *devq;
4526         uint32_t         freeze;
4527
4528         devq = sim->devq;
4529         mtx_lock(&devq->send_mtx);
4530         freeze = (devq->send_queue.qfrozen_cnt += count);
4531         mtx_unlock(&devq->send_mtx);
4532         return (freeze);
4533 }
4534
4535 static void
4536 xpt_release_devq_timeout(void *arg)
4537 {
4538         struct cam_ed *dev;
4539         struct cam_devq *devq;
4540
4541         dev = (struct cam_ed *)arg;
4542         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4543         devq = dev->sim->devq;
4544         mtx_assert(&devq->send_mtx, MA_OWNED);
4545         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4546                 xpt_run_devq(devq);
4547 }
4548
4549 void
4550 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4551 {
4552         struct cam_ed *dev;
4553         struct cam_devq *devq;
4554
4555         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4556             count, run_queue));
4557         dev = path->device;
4558         devq = dev->sim->devq;
4559         mtx_lock(&devq->send_mtx);
4560         if (xpt_release_devq_device(dev, count, run_queue))
4561                 xpt_run_devq(dev->sim->devq);
4562         mtx_unlock(&devq->send_mtx);
4563 }
4564
4565 static int
4566 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4567 {
4568
4569         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4570         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4571             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4572             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4573         if (count > dev->ccbq.queue.qfrozen_cnt) {
4574 #ifdef INVARIANTS
4575                 printf("xpt_release_devq(): requested %u > present %u\n",
4576                     count, dev->ccbq.queue.qfrozen_cnt);
4577 #endif
4578                 count = dev->ccbq.queue.qfrozen_cnt;
4579         }
4580         dev->ccbq.queue.qfrozen_cnt -= count;
4581         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4582                 /*
4583                  * No longer need to wait for a successful
4584                  * command completion.
4585                  */
4586                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4587                 /*
4588                  * Remove any timeouts that might be scheduled
4589                  * to release this queue.
4590                  */
4591                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4592                         callout_stop(&dev->callout);
4593                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4594                 }
4595                 /*
4596                  * Now that we are unfrozen schedule the
4597                  * device so any pending transactions are
4598                  * run.
4599                  */
4600                 xpt_schedule_devq(dev->sim->devq, dev);
4601         } else
4602                 run_queue = 0;
4603         return (run_queue);
4604 }
4605
4606 void
4607 xpt_release_simq(struct cam_sim *sim, int run_queue)
4608 {
4609         struct cam_devq *devq;
4610
4611         devq = sim->devq;
4612         mtx_lock(&devq->send_mtx);
4613         if (devq->send_queue.qfrozen_cnt <= 0) {
4614 #ifdef INVARIANTS
4615                 printf("xpt_release_simq: requested 1 > present %u\n",
4616                     devq->send_queue.qfrozen_cnt);
4617 #endif
4618         } else
4619                 devq->send_queue.qfrozen_cnt--;
4620         if (devq->send_queue.qfrozen_cnt == 0) {
4621                 /*
4622                  * If there is a timeout scheduled to release this
4623                  * sim queue, remove it.  The queue frozen count is
4624                  * already at 0.
4625                  */
4626                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4627                         callout_stop(&sim->callout);
4628                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4629                 }
4630                 if (run_queue) {
4631                         /*
4632                          * Now that we are unfrozen run the send queue.
4633                          */
4634                         xpt_run_devq(sim->devq);
4635                 }
4636         }
4637         mtx_unlock(&devq->send_mtx);
4638 }
4639
4640 /*
4641  * XXX Appears to be unused.
4642  */
4643 static void
4644 xpt_release_simq_timeout(void *arg)
4645 {
4646         struct cam_sim *sim;
4647
4648         sim = (struct cam_sim *)arg;
4649         xpt_release_simq(sim, /* run_queue */ TRUE);
4650 }
4651
4652 void
4653 xpt_done(union ccb *done_ccb)
4654 {
4655         struct cam_doneq *queue;
4656         int     run, hash;
4657
4658 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4659         if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4660             done_ccb->csio.bio != NULL)
4661                 biotrack(done_ccb->csio.bio, __func__);
4662 #endif
4663
4664         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4665             ("xpt_done: func= %#x %s status %#x\n",
4666                 done_ccb->ccb_h.func_code,
4667                 xpt_action_name(done_ccb->ccb_h.func_code),
4668                 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         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4675             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4676         queue = &cam_doneqs[hash];
4677         mtx_lock(&queue->cam_doneq_mtx);
4678         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4679         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4680         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4681         mtx_unlock(&queue->cam_doneq_mtx);
4682         if (run)
4683                 wakeup(&queue->cam_doneq);
4684 }
4685
4686 void
4687 xpt_done_direct(union ccb *done_ccb)
4688 {
4689
4690         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4691             ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4692         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4693                 return;
4694
4695         /* Store the time the ccb was in the sim */
4696         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4697         xpt_done_process(&done_ccb->ccb_h);
4698 }
4699
4700 union ccb *
4701 xpt_alloc_ccb()
4702 {
4703         union ccb *new_ccb;
4704
4705         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4706         return (new_ccb);
4707 }
4708
4709 union ccb *
4710 xpt_alloc_ccb_nowait()
4711 {
4712         union ccb *new_ccb;
4713
4714         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4715         return (new_ccb);
4716 }
4717
4718 void
4719 xpt_free_ccb(union ccb *free_ccb)
4720 {
4721         free(free_ccb, M_CAMCCB);
4722 }
4723
4724
4725
4726 /* Private XPT functions */
4727
4728 /*
4729  * Get a CAM control block for the caller. Charge the structure to the device
4730  * referenced by the path.  If we don't have sufficient resources to allocate
4731  * more ccbs, we return NULL.
4732  */
4733 static union ccb *
4734 xpt_get_ccb_nowait(struct cam_periph *periph)
4735 {
4736         union ccb *new_ccb;
4737
4738         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4739         if (new_ccb == NULL)
4740                 return (NULL);
4741         periph->periph_allocated++;
4742         cam_ccbq_take_opening(&periph->path->device->ccbq);
4743         return (new_ccb);
4744 }
4745
4746 static union ccb *
4747 xpt_get_ccb(struct cam_periph *periph)
4748 {
4749         union ccb *new_ccb;
4750
4751         cam_periph_unlock(periph);
4752         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4753         cam_periph_lock(periph);
4754         periph->periph_allocated++;
4755         cam_ccbq_take_opening(&periph->path->device->ccbq);
4756         return (new_ccb);
4757 }
4758
4759 union ccb *
4760 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4761 {
4762         struct ccb_hdr *ccb_h;
4763
4764         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4765         cam_periph_assert(periph, MA_OWNED);
4766         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4767             ccb_h->pinfo.priority != priority) {
4768                 if (priority < periph->immediate_priority) {
4769                         periph->immediate_priority = priority;
4770                         xpt_run_allocq(periph, 0);
4771                 } else
4772                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4773                             "cgticb", 0);
4774         }
4775         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4776         return ((union ccb *)ccb_h);
4777 }
4778
4779 static void
4780 xpt_acquire_bus(struct cam_eb *bus)
4781 {
4782
4783         xpt_lock_buses();
4784         bus->refcount++;
4785         xpt_unlock_buses();
4786 }
4787
4788 static void
4789 xpt_release_bus(struct cam_eb *bus)
4790 {
4791
4792         xpt_lock_buses();
4793         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4794         if (--bus->refcount > 0) {
4795                 xpt_unlock_buses();
4796                 return;
4797         }
4798         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4799         xsoftc.bus_generation++;
4800         xpt_unlock_buses();
4801         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4802             ("destroying bus, but target list is not empty"));
4803         cam_sim_release(bus->sim);
4804         mtx_destroy(&bus->eb_mtx);
4805         free(bus, M_CAMXPT);
4806 }
4807
4808 static struct cam_et *
4809 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4810 {
4811         struct cam_et *cur_target, *target;
4812
4813         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4814         mtx_assert(&bus->eb_mtx, MA_OWNED);
4815         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4816                                          M_NOWAIT|M_ZERO);
4817         if (target == NULL)
4818                 return (NULL);
4819
4820         TAILQ_INIT(&target->ed_entries);
4821         target->bus = bus;
4822         target->target_id = target_id;
4823         target->refcount = 1;
4824         target->generation = 0;
4825         target->luns = NULL;
4826         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4827         timevalclear(&target->last_reset);
4828         /*
4829          * Hold a reference to our parent bus so it
4830          * will not go away before we do.
4831          */
4832         bus->refcount++;
4833
4834         /* Insertion sort into our bus's target list */
4835         cur_target = TAILQ_FIRST(&bus->et_entries);
4836         while (cur_target != NULL && cur_target->target_id < target_id)
4837                 cur_target = TAILQ_NEXT(cur_target, links);
4838         if (cur_target != NULL) {
4839                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4840         } else {
4841                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4842         }
4843         bus->generation++;
4844         return (target);
4845 }
4846
4847 static void
4848 xpt_acquire_target(struct cam_et *target)
4849 {
4850         struct cam_eb *bus = target->bus;
4851
4852         mtx_lock(&bus->eb_mtx);
4853         target->refcount++;
4854         mtx_unlock(&bus->eb_mtx);
4855 }
4856
4857 static void
4858 xpt_release_target(struct cam_et *target)
4859 {
4860         struct cam_eb *bus = target->bus;
4861
4862         mtx_lock(&bus->eb_mtx);
4863         if (--target->refcount > 0) {
4864                 mtx_unlock(&bus->eb_mtx);
4865                 return;
4866         }
4867         TAILQ_REMOVE(&bus->et_entries, target, links);
4868         bus->generation++;
4869         mtx_unlock(&bus->eb_mtx);
4870         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4871             ("destroying target, but device list is not empty"));
4872         xpt_release_bus(bus);
4873         mtx_destroy(&target->luns_mtx);
4874         if (target->luns)
4875                 free(target->luns, M_CAMXPT);
4876         free(target, M_CAMXPT);
4877 }
4878
4879 static struct cam_ed *
4880 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4881                          lun_id_t lun_id)
4882 {
4883         struct cam_ed *device;
4884
4885         device = xpt_alloc_device(bus, target, lun_id);
4886         if (device == NULL)
4887                 return (NULL);
4888
4889         device->mintags = 1;
4890         device->maxtags = 1;
4891         return (device);
4892 }
4893
4894 static void
4895 xpt_destroy_device(void *context, int pending)
4896 {
4897         struct cam_ed   *device = context;
4898
4899         mtx_lock(&device->device_mtx);
4900         mtx_destroy(&device->device_mtx);
4901         free(device, M_CAMDEV);
4902 }
4903
4904 struct cam_ed *
4905 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4906 {
4907         struct cam_ed   *cur_device, *device;
4908         struct cam_devq *devq;
4909         cam_status status;
4910
4911         mtx_assert(&bus->eb_mtx, MA_OWNED);
4912         /* Make space for us in the device queue on our bus */
4913         devq = bus->sim->devq;
4914         mtx_lock(&devq->send_mtx);
4915         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4916         mtx_unlock(&devq->send_mtx);
4917         if (status != CAM_REQ_CMP)
4918                 return (NULL);
4919
4920         device = (struct cam_ed *)malloc(sizeof(*device),
4921                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4922         if (device == NULL)
4923                 return (NULL);
4924
4925         cam_init_pinfo(&device->devq_entry);
4926         device->target = target;
4927         device->lun_id = lun_id;
4928         device->sim = bus->sim;
4929         if (cam_ccbq_init(&device->ccbq,
4930                           bus->sim->max_dev_openings) != 0) {
4931                 free(device, M_CAMDEV);
4932                 return (NULL);
4933         }
4934         SLIST_INIT(&device->asyncs);
4935         SLIST_INIT(&device->periphs);
4936         device->generation = 0;
4937         device->flags = CAM_DEV_UNCONFIGURED;
4938         device->tag_delay_count = 0;
4939         device->tag_saved_openings = 0;
4940         device->refcount = 1;
4941         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4942         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4943         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4944         /*
4945          * Hold a reference to our parent bus so it
4946          * will not go away before we do.
4947          */
4948         target->refcount++;
4949
4950         cur_device = TAILQ_FIRST(&target->ed_entries);
4951         while (cur_device != NULL && cur_device->lun_id < lun_id)
4952                 cur_device = TAILQ_NEXT(cur_device, links);
4953         if (cur_device != NULL)
4954                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4955         else
4956                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4957         target->generation++;
4958         return (device);
4959 }
4960
4961 void
4962 xpt_acquire_device(struct cam_ed *device)
4963 {
4964         struct cam_eb *bus = device->target->bus;
4965
4966         mtx_lock(&bus->eb_mtx);
4967         device->refcount++;
4968         mtx_unlock(&bus->eb_mtx);
4969 }
4970
4971 void
4972 xpt_release_device(struct cam_ed *device)
4973 {
4974         struct cam_eb *bus = device->target->bus;
4975         struct cam_devq *devq;
4976
4977         mtx_lock(&bus->eb_mtx);
4978         if (--device->refcount > 0) {
4979                 mtx_unlock(&bus->eb_mtx);
4980                 return;
4981         }
4982
4983         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4984         device->target->generation++;
4985         mtx_unlock(&bus->eb_mtx);
4986
4987         /* Release our slot in the devq */
4988         devq = bus->sim->devq;
4989         mtx_lock(&devq->send_mtx);
4990         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4991         mtx_unlock(&devq->send_mtx);
4992
4993         KASSERT(SLIST_EMPTY(&device->periphs),
4994             ("destroying device, but periphs list is not empty"));
4995         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4996             ("destroying device while still queued for ccbs"));
4997
4998         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4999                 callout_stop(&device->callout);
5000
5001         xpt_release_target(device->target);
5002
5003         cam_ccbq_fini(&device->ccbq);
5004         /*
5005          * Free allocated memory.  free(9) does nothing if the
5006          * supplied pointer is NULL, so it is safe to call without
5007          * checking.
5008          */
5009         free(device->supported_vpds, M_CAMXPT);
5010         free(device->device_id, M_CAMXPT);
5011         free(device->ext_inq, M_CAMXPT);
5012         free(device->physpath, M_CAMXPT);
5013         free(device->rcap_buf, M_CAMXPT);
5014         free(device->serial_num, M_CAMXPT);
5015         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
5016 }
5017
5018 u_int32_t
5019 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
5020 {
5021         int     result;
5022         struct  cam_ed *dev;
5023
5024         dev = path->device;
5025         mtx_lock(&dev->sim->devq->send_mtx);
5026         result = cam_ccbq_resize(&dev->ccbq, newopenings);
5027         mtx_unlock(&dev->sim->devq->send_mtx);
5028         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5029          || (dev->inq_flags & SID_CmdQue) != 0)
5030                 dev->tag_saved_openings = newopenings;
5031         return (result);
5032 }
5033
5034 static struct cam_eb *
5035 xpt_find_bus(path_id_t path_id)
5036 {
5037         struct cam_eb *bus;
5038
5039         xpt_lock_buses();
5040         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
5041              bus != NULL;
5042              bus = TAILQ_NEXT(bus, links)) {
5043                 if (bus->path_id == path_id) {
5044                         bus->refcount++;
5045                         break;
5046                 }
5047         }
5048         xpt_unlock_buses();
5049         return (bus);
5050 }
5051
5052 static struct cam_et *
5053 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5054 {
5055         struct cam_et *target;
5056
5057         mtx_assert(&bus->eb_mtx, MA_OWNED);
5058         for (target = TAILQ_FIRST(&bus->et_entries);
5059              target != NULL;
5060              target = TAILQ_NEXT(target, links)) {
5061                 if (target->target_id == target_id) {
5062                         target->refcount++;
5063                         break;
5064                 }
5065         }
5066         return (target);
5067 }
5068
5069 static struct cam_ed *
5070 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5071 {
5072         struct cam_ed *device;
5073
5074         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
5075         for (device = TAILQ_FIRST(&target->ed_entries);
5076              device != NULL;
5077              device = TAILQ_NEXT(device, links)) {
5078                 if (device->lun_id == lun_id) {
5079                         device->refcount++;
5080                         break;
5081                 }
5082         }
5083         return (device);
5084 }
5085
5086 void
5087 xpt_start_tags(struct cam_path *path)
5088 {
5089         struct ccb_relsim crs;
5090         struct cam_ed *device;
5091         struct cam_sim *sim;
5092         int    newopenings;
5093
5094         device = path->device;
5095         sim = path->bus->sim;
5096         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5097         xpt_freeze_devq(path, /*count*/1);
5098         device->inq_flags |= SID_CmdQue;
5099         if (device->tag_saved_openings != 0)
5100                 newopenings = device->tag_saved_openings;
5101         else
5102                 newopenings = min(device->maxtags,
5103                                   sim->max_tagged_dev_openings);
5104         xpt_dev_ccbq_resize(path, newopenings);
5105         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5106         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5107         crs.ccb_h.func_code = XPT_REL_SIMQ;
5108         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5109         crs.openings
5110             = crs.release_timeout
5111             = crs.qfrozen_cnt
5112             = 0;
5113         xpt_action((union ccb *)&crs);
5114 }
5115
5116 void
5117 xpt_stop_tags(struct cam_path *path)
5118 {
5119         struct ccb_relsim crs;
5120         struct cam_ed *device;
5121         struct cam_sim *sim;
5122
5123         device = path->device;
5124         sim = path->bus->sim;
5125         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5126         device->tag_delay_count = 0;
5127         xpt_freeze_devq(path, /*count*/1);
5128         device->inq_flags &= ~SID_CmdQue;
5129         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
5130         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5131         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5132         crs.ccb_h.func_code = XPT_REL_SIMQ;
5133         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5134         crs.openings
5135             = crs.release_timeout
5136             = crs.qfrozen_cnt
5137             = 0;
5138         xpt_action((union ccb *)&crs);
5139 }
5140
5141 static void
5142 xpt_boot_delay(void *arg)
5143 {
5144
5145         xpt_release_boot();
5146 }
5147
5148 static void
5149 xpt_config(void *arg)
5150 {
5151         /*
5152          * Now that interrupts are enabled, go find our devices
5153          */
5154         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
5155                 printf("xpt_config: failed to create taskqueue thread.\n");
5156
5157         /* Setup debugging path */
5158         if (cam_dflags != CAM_DEBUG_NONE) {
5159                 if (xpt_create_path(&cam_dpath, NULL,
5160                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
5161                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
5162                         printf("xpt_config: xpt_create_path() failed for debug"
5163                                " target %d:%d:%d, debugging disabled\n",
5164                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
5165                         cam_dflags = CAM_DEBUG_NONE;
5166                 }
5167         } else
5168                 cam_dpath = NULL;
5169
5170         periphdriver_init(1);
5171         xpt_hold_boot();
5172         callout_init(&xsoftc.boot_callout, 1);
5173         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5174             xpt_boot_delay, NULL, 0);
5175         /* Fire up rescan thread. */
5176         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5177             "cam", "scanner")) {
5178                 printf("xpt_config: failed to create rescan thread.\n");
5179         }
5180 }
5181
5182 void
5183 xpt_hold_boot(void)
5184 {
5185         xpt_lock_buses();
5186         xsoftc.buses_to_config++;
5187         xpt_unlock_buses();
5188 }
5189
5190 void
5191 xpt_release_boot(void)
5192 {
5193         xpt_lock_buses();
5194         xsoftc.buses_to_config--;
5195         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
5196                 struct  xpt_task *task;
5197
5198                 xsoftc.buses_config_done = 1;
5199                 xpt_unlock_buses();
5200                 /* Call manually because we don't have any buses */
5201                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
5202                 if (task != NULL) {
5203                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
5204                         taskqueue_enqueue(taskqueue_thread, &task->task);
5205                 }
5206         } else
5207                 xpt_unlock_buses();
5208 }
5209
5210 /*
5211  * If the given device only has one peripheral attached to it, and if that
5212  * peripheral is the passthrough driver, announce it.  This insures that the
5213  * user sees some sort of announcement for every peripheral in their system.
5214  */
5215 static int
5216 xptpassannouncefunc(struct cam_ed *device, void *arg)
5217 {
5218         struct cam_periph *periph;
5219         int i;
5220
5221         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5222              periph = SLIST_NEXT(periph, periph_links), i++);
5223
5224         periph = SLIST_FIRST(&device->periphs);
5225         if ((i == 1)
5226          && (strncmp(periph->periph_name, "pass", 4) == 0))
5227                 xpt_announce_periph(periph, NULL);
5228
5229         return(1);
5230 }
5231
5232 static void
5233 xpt_finishconfig_task(void *context, int pending)
5234 {
5235
5236         periphdriver_init(2);
5237         /*
5238          * Check for devices with no "standard" peripheral driver
5239          * attached.  For any devices like that, announce the
5240          * passthrough driver so the user will see something.
5241          */
5242         if (!bootverbose)
5243                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5244
5245         /* Release our hook so that the boot can continue. */
5246         config_intrhook_disestablish(xsoftc.xpt_config_hook);
5247         free(xsoftc.xpt_config_hook, M_CAMXPT);
5248         xsoftc.xpt_config_hook = NULL;
5249
5250         free(context, M_CAMXPT);
5251 }
5252
5253 cam_status
5254 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5255                    struct cam_path *path)
5256 {
5257         struct ccb_setasync csa;
5258         cam_status status;
5259         int xptpath = 0;
5260
5261         if (path == NULL) {
5262                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5263                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5264                 if (status != CAM_REQ_CMP)
5265                         return (status);
5266                 xpt_path_lock(path);
5267                 xptpath = 1;
5268         }
5269
5270         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5271         csa.ccb_h.func_code = XPT_SASYNC_CB;
5272         csa.event_enable = event;
5273         csa.callback = cbfunc;
5274         csa.callback_arg = cbarg;
5275         xpt_action((union ccb *)&csa);
5276         status = csa.ccb_h.status;
5277
5278         CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5279             ("xpt_register_async: func %p\n", cbfunc));
5280
5281         if (xptpath) {
5282                 xpt_path_unlock(path);
5283                 xpt_free_path(path);
5284         }
5285
5286         if ((status == CAM_REQ_CMP) &&
5287             (csa.event_enable & AC_FOUND_DEVICE)) {
5288                 /*
5289                  * Get this peripheral up to date with all
5290                  * the currently existing devices.
5291                  */
5292                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5293         }
5294         if ((status == CAM_REQ_CMP) &&
5295             (csa.event_enable & AC_PATH_REGISTERED)) {
5296                 /*
5297                  * Get this peripheral up to date with all
5298                  * the currently existing buses.
5299                  */
5300                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5301         }
5302
5303         return (status);
5304 }
5305
5306 static void
5307 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5308 {
5309         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5310
5311         switch (work_ccb->ccb_h.func_code) {
5312         /* Common cases first */
5313         case XPT_PATH_INQ:              /* Path routing inquiry */
5314         {
5315                 struct ccb_pathinq *cpi;
5316
5317                 cpi = &work_ccb->cpi;
5318                 cpi->version_num = 1; /* XXX??? */
5319                 cpi->hba_inquiry = 0;
5320                 cpi->target_sprt = 0;
5321                 cpi->hba_misc = 0;
5322                 cpi->hba_eng_cnt = 0;
5323                 cpi->max_target = 0;
5324                 cpi->max_lun = 0;
5325                 cpi->initiator_id = 0;
5326                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5327                 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5328                 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5329                 cpi->unit_number = sim->unit_number;
5330                 cpi->bus_id = sim->bus_id;
5331                 cpi->base_transfer_speed = 0;
5332                 cpi->protocol = PROTO_UNSPECIFIED;
5333                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5334                 cpi->transport = XPORT_UNSPECIFIED;
5335                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5336                 cpi->ccb_h.status = CAM_REQ_CMP;
5337                 xpt_done(work_ccb);
5338                 break;
5339         }
5340         default:
5341                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5342                 xpt_done(work_ccb);
5343                 break;
5344         }
5345 }
5346
5347 /*
5348  * The xpt as a "controller" has no interrupt sources, so polling
5349  * is a no-op.
5350  */
5351 static void
5352 xptpoll(struct cam_sim *sim)
5353 {
5354 }
5355
5356 void
5357 xpt_lock_buses(void)
5358 {
5359         mtx_lock(&xsoftc.xpt_topo_lock);
5360 }
5361
5362 void
5363 xpt_unlock_buses(void)
5364 {
5365         mtx_unlock(&xsoftc.xpt_topo_lock);
5366 }
5367
5368 struct mtx *
5369 xpt_path_mtx(struct cam_path *path)
5370 {
5371
5372         return (&path->device->device_mtx);
5373 }
5374
5375 static void
5376 xpt_done_process(struct ccb_hdr *ccb_h)
5377 {
5378         struct cam_sim *sim;
5379         struct cam_devq *devq;
5380         struct mtx *mtx = NULL;
5381
5382 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5383         struct ccb_scsiio *csio;
5384
5385         if (ccb_h->func_code == XPT_SCSI_IO) {
5386                 csio = &((union ccb *)ccb_h)->csio;
5387                 if (csio->bio != NULL)
5388                         biotrack(csio->bio, __func__);
5389         }
5390 #endif
5391
5392         if (ccb_h->flags & CAM_HIGH_POWER) {
5393                 struct highpowerlist    *hphead;
5394                 struct cam_ed           *device;
5395
5396                 mtx_lock(&xsoftc.xpt_highpower_lock);
5397                 hphead = &xsoftc.highpowerq;
5398
5399                 device = STAILQ_FIRST(hphead);
5400
5401                 /*
5402                  * Increment the count since this command is done.
5403                  */
5404                 xsoftc.num_highpower++;
5405
5406                 /*
5407                  * Any high powered commands queued up?
5408                  */
5409                 if (device != NULL) {
5410
5411                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5412                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5413
5414                         mtx_lock(&device->sim->devq->send_mtx);
5415                         xpt_release_devq_device(device,
5416                                          /*count*/1, /*runqueue*/TRUE);
5417                         mtx_unlock(&device->sim->devq->send_mtx);
5418                 } else
5419                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5420         }
5421
5422         sim = ccb_h->path->bus->sim;
5423
5424         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5425                 xpt_release_simq(sim, /*run_queue*/FALSE);
5426                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5427         }
5428
5429         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5430          && (ccb_h->status & CAM_DEV_QFRZN)) {
5431                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5432                 ccb_h->status &= ~CAM_DEV_QFRZN;
5433         }
5434
5435         devq = sim->devq;
5436         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5437                 struct cam_ed *dev = ccb_h->path->device;
5438
5439                 mtx_lock(&devq->send_mtx);
5440                 devq->send_active--;
5441                 devq->send_openings++;
5442                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5443
5444                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5445                   && (dev->ccbq.dev_active == 0))) {
5446                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5447                         xpt_release_devq_device(dev, /*count*/1,
5448                                          /*run_queue*/FALSE);
5449                 }
5450
5451                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5452                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5453                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5454                         xpt_release_devq_device(dev, /*count*/1,
5455                                          /*run_queue*/FALSE);
5456                 }
5457
5458                 if (!device_is_queued(dev))
5459                         (void)xpt_schedule_devq(devq, dev);
5460                 xpt_run_devq(devq);
5461                 mtx_unlock(&devq->send_mtx);
5462
5463                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5464                         mtx = xpt_path_mtx(ccb_h->path);
5465                         mtx_lock(mtx);
5466
5467                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5468                          && (--dev->tag_delay_count == 0))
5469                                 xpt_start_tags(ccb_h->path);
5470                 }
5471         }
5472
5473         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5474                 if (mtx == NULL) {
5475                         mtx = xpt_path_mtx(ccb_h->path);
5476                         mtx_lock(mtx);
5477                 }
5478         } else {
5479                 if (mtx != NULL) {
5480                         mtx_unlock(mtx);
5481                         mtx = NULL;
5482                 }
5483         }
5484
5485         /* Call the peripheral driver's callback */
5486         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5487         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5488         if (mtx != NULL)
5489                 mtx_unlock(mtx);
5490 }
5491
5492 void
5493 xpt_done_td(void *arg)
5494 {
5495         struct cam_doneq *queue = arg;
5496         struct ccb_hdr *ccb_h;
5497         STAILQ_HEAD(, ccb_hdr)  doneq;
5498
5499         STAILQ_INIT(&doneq);
5500         mtx_lock(&queue->cam_doneq_mtx);
5501         while (1) {
5502                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5503                         queue->cam_doneq_sleep = 1;
5504                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5505                             PRIBIO, "-", 0);
5506                         queue->cam_doneq_sleep = 0;
5507                 }
5508                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5509                 mtx_unlock(&queue->cam_doneq_mtx);
5510
5511                 THREAD_NO_SLEEPING();
5512                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5513                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5514                         xpt_done_process(ccb_h);
5515                 }
5516                 THREAD_SLEEPING_OK();
5517
5518                 mtx_lock(&queue->cam_doneq_mtx);
5519         }
5520 }
5521
5522 static void
5523 camisr_runqueue(void)
5524 {
5525         struct  ccb_hdr *ccb_h;
5526         struct cam_doneq *queue;
5527         int i;
5528
5529         /* Process global queues. */
5530         for (i = 0; i < cam_num_doneqs; i++) {
5531                 queue = &cam_doneqs[i];
5532                 mtx_lock(&queue->cam_doneq_mtx);
5533                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5534                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5535                         mtx_unlock(&queue->cam_doneq_mtx);
5536                         xpt_done_process(ccb_h);
5537                         mtx_lock(&queue->cam_doneq_mtx);
5538                 }
5539                 mtx_unlock(&queue->cam_doneq_mtx);
5540         }
5541 }
5542
5543 struct kv
5544 {
5545         uint32_t v;
5546         const char *name;
5547 };
5548
5549 static struct kv map[] = {
5550         { XPT_NOOP, "XPT_NOOP" },
5551         { XPT_SCSI_IO, "XPT_SCSI_IO" },
5552         { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5553         { XPT_GDEVLIST, "XPT_GDEVLIST" },
5554         { XPT_PATH_INQ, "XPT_PATH_INQ" },
5555         { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5556         { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5557         { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5558         { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5559         { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5560         { XPT_DEBUG, "XPT_DEBUG" },
5561         { XPT_PATH_STATS, "XPT_PATH_STATS" },
5562         { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5563         { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5564         { XPT_ASYNC, "XPT_ASYNC" },
5565         { XPT_ABORT, "XPT_ABORT" },
5566         { XPT_RESET_BUS, "XPT_RESET_BUS" },
5567         { XPT_RESET_DEV, "XPT_RESET_DEV" },
5568         { XPT_TERM_IO, "XPT_TERM_IO" },
5569         { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5570         { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5571         { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5572         { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5573         { XPT_ATA_IO, "XPT_ATA_IO" },
5574         { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5575         { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5576         { XPT_NVME_IO, "XPT_NVME_IO" },
5577         { XPT_MMC_IO, "XPT_MMC_IO" },
5578         { XPT_SMP_IO, "XPT_SMP_IO" },
5579         { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5580         { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" },
5581         { XPT_ENG_INQ, "XPT_ENG_INQ" },
5582         { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5583         { XPT_EN_LUN, "XPT_EN_LUN" },
5584         { XPT_TARGET_IO, "XPT_TARGET_IO" },
5585         { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5586         { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5587         { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5588         { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5589         { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5590         { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5591         { 0, 0 }
5592 };
5593
5594 const char *
5595 xpt_action_name(uint32_t action)
5596 {
5597         static char buffer[32]; /* Only for unknown messages -- racy */
5598         struct kv *walker = map;
5599
5600         while (walker->name != NULL) {
5601                 if (walker->v == action)
5602                         return (walker->name);
5603                 walker++;
5604         }
5605
5606         snprintf(buffer, sizeof(buffer), "%#x", action);
5607         return (buffer);
5608 }