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         cam_periph_doacquire(periph);
3387         periph->periph_allocating = 1;
3388         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3389         device = periph->path->device;
3390         ccb = NULL;
3391 restart:
3392         while ((prio = min(periph->scheduled_priority,
3393             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3394             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3395              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3396
3397                 if (ccb == NULL &&
3398                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3399                         if (sleep) {
3400                                 ccb = xpt_get_ccb(periph);
3401                                 goto restart;
3402                         }
3403                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3404                                 break;
3405                         cam_periph_doacquire(periph);
3406                         periph->flags |= CAM_PERIPH_RUN_TASK;
3407                         taskqueue_enqueue(xsoftc.xpt_taskq,
3408                             &periph->periph_run_task);
3409                         break;
3410                 }
3411                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3412                 if (prio == periph->immediate_priority) {
3413                         periph->immediate_priority = CAM_PRIORITY_NONE;
3414                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3415                                         ("waking cam_periph_getccb()\n"));
3416                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3417                                           periph_links.sle);
3418                         wakeup(&periph->ccb_list);
3419                 } else {
3420                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3421                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3422                                         ("calling periph_start()\n"));
3423                         periph->periph_start(periph, ccb);
3424                 }
3425                 ccb = NULL;
3426         }
3427         if (ccb != NULL)
3428                 xpt_release_ccb(ccb);
3429         periph->periph_allocating = 0;
3430         cam_periph_release_locked(periph);
3431 }
3432
3433 static void
3434 xpt_run_devq(struct cam_devq *devq)
3435 {
3436         struct mtx *mtx;
3437
3438         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3439
3440         devq->send_queue.qfrozen_cnt++;
3441         while ((devq->send_queue.entries > 0)
3442             && (devq->send_openings > 0)
3443             && (devq->send_queue.qfrozen_cnt <= 1)) {
3444                 struct  cam_ed *device;
3445                 union ccb *work_ccb;
3446                 struct  cam_sim *sim;
3447                 struct xpt_proto *proto;
3448
3449                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3450                                                            CAMQ_HEAD);
3451                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3452                                 ("running device %p\n", device));
3453
3454                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3455                 if (work_ccb == NULL) {
3456                         printf("device on run queue with no ccbs???\n");
3457                         continue;
3458                 }
3459
3460                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3461
3462                         mtx_lock(&xsoftc.xpt_highpower_lock);
3463                         if (xsoftc.num_highpower <= 0) {
3464                                 /*
3465                                  * We got a high power command, but we
3466                                  * don't have any available slots.  Freeze
3467                                  * the device queue until we have a slot
3468                                  * available.
3469                                  */
3470                                 xpt_freeze_devq_device(device, 1);
3471                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3472                                                    highpowerq_entry);
3473
3474                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3475                                 continue;
3476                         } else {
3477                                 /*
3478                                  * Consume a high power slot while
3479                                  * this ccb runs.
3480                                  */
3481                                 xsoftc.num_highpower--;
3482                         }
3483                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3484                 }
3485                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3486                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3487                 devq->send_openings--;
3488                 devq->send_active++;
3489                 xpt_schedule_devq(devq, device);
3490                 mtx_unlock(&devq->send_mtx);
3491
3492                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3493                         /*
3494                          * The client wants to freeze the queue
3495                          * after this CCB is sent.
3496                          */
3497                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3498                 }
3499
3500                 /* In Target mode, the peripheral driver knows best... */
3501                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3502                         if ((device->inq_flags & SID_CmdQue) != 0
3503                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3504                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3505                         else
3506                                 /*
3507                                  * Clear this in case of a retried CCB that
3508                                  * failed due to a rejected tag.
3509                                  */
3510                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3511                 }
3512
3513                 KASSERT(device == work_ccb->ccb_h.path->device,
3514                     ("device (%p) / path->device (%p) mismatch",
3515                         device, work_ccb->ccb_h.path->device));
3516                 proto = xpt_proto_find(device->protocol);
3517                 if (proto && proto->ops->debug_out)
3518                         proto->ops->debug_out(work_ccb);
3519
3520                 /*
3521                  * Device queues can be shared among multiple SIM instances
3522                  * that reside on different buses.  Use the SIM from the
3523                  * queued device, rather than the one from the calling bus.
3524                  */
3525                 sim = device->sim;
3526                 mtx = sim->mtx;
3527                 if (mtx && !mtx_owned(mtx))
3528                         mtx_lock(mtx);
3529                 else
3530                         mtx = NULL;
3531                 work_ccb->ccb_h.qos.periph_data = cam_iosched_now();
3532                 (*(sim->sim_action))(sim, work_ccb);
3533                 if (mtx)
3534                         mtx_unlock(mtx);
3535                 mtx_lock(&devq->send_mtx);
3536         }
3537         devq->send_queue.qfrozen_cnt--;
3538 }
3539
3540 /*
3541  * This function merges stuff from the slave ccb into the master ccb, while
3542  * keeping important fields in the master ccb constant.
3543  */
3544 void
3545 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3546 {
3547
3548         /*
3549          * Pull fields that are valid for peripheral drivers to set
3550          * into the master CCB along with the CCB "payload".
3551          */
3552         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3553         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3554         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3555         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3556         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3557               sizeof(union ccb) - sizeof(struct ccb_hdr));
3558 }
3559
3560 void
3561 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3562                     u_int32_t priority, u_int32_t flags)
3563 {
3564
3565         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3566         ccb_h->pinfo.priority = priority;
3567         ccb_h->path = path;
3568         ccb_h->path_id = path->bus->path_id;
3569         if (path->target)
3570                 ccb_h->target_id = path->target->target_id;
3571         else
3572                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3573         if (path->device) {
3574                 ccb_h->target_lun = path->device->lun_id;
3575                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3576         } else {
3577                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3578         }
3579         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3580         ccb_h->flags = flags;
3581         ccb_h->xflags = 0;
3582 }
3583
3584 void
3585 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3586 {
3587         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3588 }
3589
3590 /* Path manipulation functions */
3591 cam_status
3592 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3593                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3594 {
3595         struct     cam_path *path;
3596         cam_status status;
3597
3598         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3599
3600         if (path == NULL) {
3601                 status = CAM_RESRC_UNAVAIL;
3602                 return(status);
3603         }
3604         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3605         if (status != CAM_REQ_CMP) {
3606                 free(path, M_CAMPATH);
3607                 path = NULL;
3608         }
3609         *new_path_ptr = path;
3610         return (status);
3611 }
3612
3613 cam_status
3614 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3615                          struct cam_periph *periph, path_id_t path_id,
3616                          target_id_t target_id, lun_id_t lun_id)
3617 {
3618
3619         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3620             lun_id));
3621 }
3622
3623 cam_status
3624 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3625                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3626 {
3627         struct       cam_eb *bus;
3628         struct       cam_et *target;
3629         struct       cam_ed *device;
3630         cam_status   status;
3631
3632         status = CAM_REQ_CMP;   /* Completed without error */
3633         target = NULL;          /* Wildcarded */
3634         device = NULL;          /* Wildcarded */
3635
3636         /*
3637          * We will potentially modify the EDT, so block interrupts
3638          * that may attempt to create cam paths.
3639          */
3640         bus = xpt_find_bus(path_id);
3641         if (bus == NULL) {
3642                 status = CAM_PATH_INVALID;
3643         } else {
3644                 xpt_lock_buses();
3645                 mtx_lock(&bus->eb_mtx);
3646                 target = xpt_find_target(bus, target_id);
3647                 if (target == NULL) {
3648                         /* Create one */
3649                         struct cam_et *new_target;
3650
3651                         new_target = xpt_alloc_target(bus, target_id);
3652                         if (new_target == NULL) {
3653                                 status = CAM_RESRC_UNAVAIL;
3654                         } else {
3655                                 target = new_target;
3656                         }
3657                 }
3658                 xpt_unlock_buses();
3659                 if (target != NULL) {
3660                         device = xpt_find_device(target, lun_id);
3661                         if (device == NULL) {
3662                                 /* Create one */
3663                                 struct cam_ed *new_device;
3664
3665                                 new_device =
3666                                     (*(bus->xport->ops->alloc_device))(bus,
3667                                                                        target,
3668                                                                        lun_id);
3669                                 if (new_device == NULL) {
3670                                         status = CAM_RESRC_UNAVAIL;
3671                                 } else {
3672                                         device = new_device;
3673                                 }
3674                         }
3675                 }
3676                 mtx_unlock(&bus->eb_mtx);
3677         }
3678
3679         /*
3680          * Only touch the user's data if we are successful.
3681          */
3682         if (status == CAM_REQ_CMP) {
3683                 new_path->periph = perph;
3684                 new_path->bus = bus;
3685                 new_path->target = target;
3686                 new_path->device = device;
3687                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3688         } else {
3689                 if (device != NULL)
3690                         xpt_release_device(device);
3691                 if (target != NULL)
3692                         xpt_release_target(target);
3693                 if (bus != NULL)
3694                         xpt_release_bus(bus);
3695         }
3696         return (status);
3697 }
3698
3699 cam_status
3700 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3701 {
3702         struct     cam_path *new_path;
3703
3704         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3705         if (new_path == NULL)
3706                 return(CAM_RESRC_UNAVAIL);
3707         xpt_copy_path(new_path, path);
3708         *new_path_ptr = new_path;
3709         return (CAM_REQ_CMP);
3710 }
3711
3712 void
3713 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3714 {
3715
3716         *new_path = *path;
3717         if (path->bus != NULL)
3718                 xpt_acquire_bus(path->bus);
3719         if (path->target != NULL)
3720                 xpt_acquire_target(path->target);
3721         if (path->device != NULL)
3722                 xpt_acquire_device(path->device);
3723 }
3724
3725 void
3726 xpt_release_path(struct cam_path *path)
3727 {
3728         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3729         if (path->device != NULL) {
3730                 xpt_release_device(path->device);
3731                 path->device = NULL;
3732         }
3733         if (path->target != NULL) {
3734                 xpt_release_target(path->target);
3735                 path->target = NULL;
3736         }
3737         if (path->bus != NULL) {
3738                 xpt_release_bus(path->bus);
3739                 path->bus = NULL;
3740         }
3741 }
3742
3743 void
3744 xpt_free_path(struct cam_path *path)
3745 {
3746
3747         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3748         xpt_release_path(path);
3749         free(path, M_CAMPATH);
3750 }
3751
3752 void
3753 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3754     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3755 {
3756
3757         xpt_lock_buses();
3758         if (bus_ref) {
3759                 if (path->bus)
3760                         *bus_ref = path->bus->refcount;
3761                 else
3762                         *bus_ref = 0;
3763         }
3764         if (periph_ref) {
3765                 if (path->periph)
3766                         *periph_ref = path->periph->refcount;
3767                 else
3768                         *periph_ref = 0;
3769         }
3770         xpt_unlock_buses();
3771         if (target_ref) {
3772                 if (path->target)
3773                         *target_ref = path->target->refcount;
3774                 else
3775                         *target_ref = 0;
3776         }
3777         if (device_ref) {
3778                 if (path->device)
3779                         *device_ref = path->device->refcount;
3780                 else
3781                         *device_ref = 0;
3782         }
3783 }
3784
3785 /*
3786  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3787  * in path1, 2 for match with wildcards in path2.
3788  */
3789 int
3790 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3791 {
3792         int retval = 0;
3793
3794         if (path1->bus != path2->bus) {
3795                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3796                         retval = 1;
3797                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3798                         retval = 2;
3799                 else
3800                         return (-1);
3801         }
3802         if (path1->target != path2->target) {
3803                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3804                         if (retval == 0)
3805                                 retval = 1;
3806                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3807                         retval = 2;
3808                 else
3809                         return (-1);
3810         }
3811         if (path1->device != path2->device) {
3812                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3813                         if (retval == 0)
3814                                 retval = 1;
3815                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3816                         retval = 2;
3817                 else
3818                         return (-1);
3819         }
3820         return (retval);
3821 }
3822
3823 int
3824 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3825 {
3826         int retval = 0;
3827
3828         if (path->bus != dev->target->bus) {
3829                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3830                         retval = 1;
3831                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3832                         retval = 2;
3833                 else
3834                         return (-1);
3835         }
3836         if (path->target != dev->target) {
3837                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3838                         if (retval == 0)
3839                                 retval = 1;
3840                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3841                         retval = 2;
3842                 else
3843                         return (-1);
3844         }
3845         if (path->device != dev) {
3846                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3847                         if (retval == 0)
3848                                 retval = 1;
3849                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3850                         retval = 2;
3851                 else
3852                         return (-1);
3853         }
3854         return (retval);
3855 }
3856
3857 void
3858 xpt_print_path(struct cam_path *path)
3859 {
3860         struct sbuf sb;
3861         char buffer[XPT_PRINT_LEN];
3862
3863         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3864         xpt_path_sbuf(path, &sb);
3865         sbuf_finish(&sb);
3866         printf("%s", sbuf_data(&sb));
3867         sbuf_delete(&sb);
3868 }
3869
3870 void
3871 xpt_print_device(struct cam_ed *device)
3872 {
3873
3874         if (device == NULL)
3875                 printf("(nopath): ");
3876         else {
3877                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3878                        device->sim->unit_number,
3879                        device->sim->bus_id,
3880                        device->target->target_id,
3881                        (uintmax_t)device->lun_id);
3882         }
3883 }
3884
3885 void
3886 xpt_print(struct cam_path *path, const char *fmt, ...)
3887 {
3888         va_list ap;
3889         struct sbuf sb;
3890         char buffer[XPT_PRINT_LEN];
3891
3892         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3893
3894         xpt_path_sbuf(path, &sb);
3895         va_start(ap, fmt);
3896         sbuf_vprintf(&sb, fmt, ap);
3897         va_end(ap);
3898
3899         sbuf_finish(&sb);
3900         printf("%s", sbuf_data(&sb));
3901         sbuf_delete(&sb);
3902 }
3903
3904 int
3905 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3906 {
3907         struct sbuf sb;
3908         int len;
3909
3910         sbuf_new(&sb, str, str_len, 0);
3911         len = xpt_path_sbuf(path, &sb);
3912         sbuf_finish(&sb);
3913         return (len);
3914 }
3915
3916 int
3917 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb)
3918 {
3919
3920         if (path == NULL)
3921                 sbuf_printf(sb, "(nopath): ");
3922         else {
3923                 if (path->periph != NULL)
3924                         sbuf_printf(sb, "(%s%d:", path->periph->periph_name,
3925                                     path->periph->unit_number);
3926                 else
3927                         sbuf_printf(sb, "(noperiph:");
3928
3929                 if (path->bus != NULL)
3930                         sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name,
3931                                     path->bus->sim->unit_number,
3932                                     path->bus->sim->bus_id);
3933                 else
3934                         sbuf_printf(sb, "nobus:");
3935
3936                 if (path->target != NULL)
3937                         sbuf_printf(sb, "%d:", path->target->target_id);
3938                 else
3939                         sbuf_printf(sb, "X:");
3940
3941                 if (path->device != NULL)
3942                         sbuf_printf(sb, "%jx): ",
3943                             (uintmax_t)path->device->lun_id);
3944                 else
3945                         sbuf_printf(sb, "X): ");
3946         }
3947
3948         return(sbuf_len(sb));
3949 }
3950
3951 path_id_t
3952 xpt_path_path_id(struct cam_path *path)
3953 {
3954         return(path->bus->path_id);
3955 }
3956
3957 target_id_t
3958 xpt_path_target_id(struct cam_path *path)
3959 {
3960         if (path->target != NULL)
3961                 return (path->target->target_id);
3962         else
3963                 return (CAM_TARGET_WILDCARD);
3964 }
3965
3966 lun_id_t
3967 xpt_path_lun_id(struct cam_path *path)
3968 {
3969         if (path->device != NULL)
3970                 return (path->device->lun_id);
3971         else
3972                 return (CAM_LUN_WILDCARD);
3973 }
3974
3975 struct cam_sim *
3976 xpt_path_sim(struct cam_path *path)
3977 {
3978
3979         return (path->bus->sim);
3980 }
3981
3982 struct cam_periph*
3983 xpt_path_periph(struct cam_path *path)
3984 {
3985
3986         return (path->periph);
3987 }
3988
3989 /*
3990  * Release a CAM control block for the caller.  Remit the cost of the structure
3991  * to the device referenced by the path.  If the this device had no 'credits'
3992  * and peripheral drivers have registered async callbacks for this notification
3993  * call them now.
3994  */
3995 void
3996 xpt_release_ccb(union ccb *free_ccb)
3997 {
3998         struct   cam_ed *device;
3999         struct   cam_periph *periph;
4000
4001         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
4002         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
4003         device = free_ccb->ccb_h.path->device;
4004         periph = free_ccb->ccb_h.path->periph;
4005
4006         xpt_free_ccb(free_ccb);
4007         periph->periph_allocated--;
4008         cam_ccbq_release_opening(&device->ccbq);
4009         xpt_run_allocq(periph, 0);
4010 }
4011
4012 /* Functions accessed by SIM drivers */
4013
4014 static struct xpt_xport_ops xport_default_ops = {
4015         .alloc_device = xpt_alloc_device_default,
4016         .action = xpt_action_default,
4017         .async = xpt_dev_async_default,
4018 };
4019 static struct xpt_xport xport_default = {
4020         .xport = XPORT_UNKNOWN,
4021         .name = "unknown",
4022         .ops = &xport_default_ops,
4023 };
4024
4025 CAM_XPT_XPORT(xport_default);
4026
4027 /*
4028  * A sim structure, listing the SIM entry points and instance
4029  * identification info is passed to xpt_bus_register to hook the SIM
4030  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
4031  * for this new bus and places it in the array of buses and assigns
4032  * it a path_id.  The path_id may be influenced by "hard wiring"
4033  * information specified by the user.  Once interrupt services are
4034  * available, the bus will be probed.
4035  */
4036 int32_t
4037 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
4038 {
4039         struct cam_eb *new_bus;
4040         struct cam_eb *old_bus;
4041         struct ccb_pathinq cpi;
4042         struct cam_path *path;
4043         cam_status status;
4044
4045         sim->bus_id = bus;
4046         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4047                                           M_CAMXPT, M_NOWAIT|M_ZERO);
4048         if (new_bus == NULL) {
4049                 /* Couldn't satisfy request */
4050                 return (CAM_RESRC_UNAVAIL);
4051         }
4052
4053         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
4054         TAILQ_INIT(&new_bus->et_entries);
4055         cam_sim_hold(sim);
4056         new_bus->sim = sim;
4057         timevalclear(&new_bus->last_reset);
4058         new_bus->flags = 0;
4059         new_bus->refcount = 1;  /* Held until a bus_deregister event */
4060         new_bus->generation = 0;
4061
4062         xpt_lock_buses();
4063         sim->path_id = new_bus->path_id =
4064             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4065         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4066         while (old_bus != NULL
4067             && old_bus->path_id < new_bus->path_id)
4068                 old_bus = TAILQ_NEXT(old_bus, links);
4069         if (old_bus != NULL)
4070                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4071         else
4072                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
4073         xsoftc.bus_generation++;
4074         xpt_unlock_buses();
4075
4076         /*
4077          * Set a default transport so that a PATH_INQ can be issued to
4078          * the SIM.  This will then allow for probing and attaching of
4079          * a more appropriate transport.
4080          */
4081         new_bus->xport = &xport_default;
4082
4083         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
4084                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4085         if (status != CAM_REQ_CMP) {
4086                 xpt_release_bus(new_bus);
4087                 return (CAM_RESRC_UNAVAIL);
4088         }
4089
4090         xpt_path_inq(&cpi, path);
4091
4092         if (cpi.ccb_h.status == CAM_REQ_CMP) {
4093                 struct xpt_xport **xpt;
4094
4095                 SET_FOREACH(xpt, cam_xpt_xport_set) {
4096                         if ((*xpt)->xport == cpi.transport) {
4097                                 new_bus->xport = *xpt;
4098                                 break;
4099                         }
4100                 }
4101                 if (new_bus->xport == NULL) {
4102                         xpt_print(path,
4103                             "No transport found for %d\n", cpi.transport);
4104                         xpt_release_bus(new_bus);
4105                         free(path, M_CAMXPT);
4106                         return (CAM_RESRC_UNAVAIL);
4107                 }
4108         }
4109
4110         /* Notify interested parties */
4111         if (sim->path_id != CAM_XPT_PATH_ID) {
4112
4113                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
4114                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
4115                         union   ccb *scan_ccb;
4116
4117                         /* Initiate bus rescan. */
4118                         scan_ccb = xpt_alloc_ccb_nowait();
4119                         if (scan_ccb != NULL) {
4120                                 scan_ccb->ccb_h.path = path;
4121                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
4122                                 scan_ccb->crcn.flags = 0;
4123                                 xpt_rescan(scan_ccb);
4124                         } else {
4125                                 xpt_print(path,
4126                                           "Can't allocate CCB to scan bus\n");
4127                                 xpt_free_path(path);
4128                         }
4129                 } else
4130                         xpt_free_path(path);
4131         } else
4132                 xpt_free_path(path);
4133         return (CAM_SUCCESS);
4134 }
4135
4136 int32_t
4137 xpt_bus_deregister(path_id_t pathid)
4138 {
4139         struct cam_path bus_path;
4140         cam_status status;
4141
4142         status = xpt_compile_path(&bus_path, NULL, pathid,
4143                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4144         if (status != CAM_REQ_CMP)
4145                 return (status);
4146
4147         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4148         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4149
4150         /* Release the reference count held while registered. */
4151         xpt_release_bus(bus_path.bus);
4152         xpt_release_path(&bus_path);
4153
4154         return (CAM_REQ_CMP);
4155 }
4156
4157 static path_id_t
4158 xptnextfreepathid(void)
4159 {
4160         struct cam_eb *bus;
4161         path_id_t pathid;
4162         const char *strval;
4163
4164         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4165         pathid = 0;
4166         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4167 retry:
4168         /* Find an unoccupied pathid */
4169         while (bus != NULL && bus->path_id <= pathid) {
4170                 if (bus->path_id == pathid)
4171                         pathid++;
4172                 bus = TAILQ_NEXT(bus, links);
4173         }
4174
4175         /*
4176          * Ensure that this pathid is not reserved for
4177          * a bus that may be registered in the future.
4178          */
4179         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4180                 ++pathid;
4181                 /* Start the search over */
4182                 goto retry;
4183         }
4184         return (pathid);
4185 }
4186
4187 static path_id_t
4188 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4189 {
4190         path_id_t pathid;
4191         int i, dunit, val;
4192         char buf[32];
4193         const char *dname;
4194
4195         pathid = CAM_XPT_PATH_ID;
4196         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4197         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4198                 return (pathid);
4199         i = 0;
4200         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4201                 if (strcmp(dname, "scbus")) {
4202                         /* Avoid a bit of foot shooting. */
4203                         continue;
4204                 }
4205                 if (dunit < 0)          /* unwired?! */
4206                         continue;
4207                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4208                         if (sim_bus == val) {
4209                                 pathid = dunit;
4210                                 break;
4211                         }
4212                 } else if (sim_bus == 0) {
4213                         /* Unspecified matches bus 0 */
4214                         pathid = dunit;
4215                         break;
4216                 } else {
4217                         printf("Ambiguous scbus configuration for %s%d "
4218                                "bus %d, cannot wire down.  The kernel "
4219                                "config entry for scbus%d should "
4220                                "specify a controller bus.\n"
4221                                "Scbus will be assigned dynamically.\n",
4222                                sim_name, sim_unit, sim_bus, dunit);
4223                         break;
4224                 }
4225         }
4226
4227         if (pathid == CAM_XPT_PATH_ID)
4228                 pathid = xptnextfreepathid();
4229         return (pathid);
4230 }
4231
4232 static const char *
4233 xpt_async_string(u_int32_t async_code)
4234 {
4235
4236         switch (async_code) {
4237         case AC_BUS_RESET: return ("AC_BUS_RESET");
4238         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4239         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4240         case AC_SENT_BDR: return ("AC_SENT_BDR");
4241         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4242         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4243         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4244         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4245         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4246         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4247         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4248         case AC_CONTRACT: return ("AC_CONTRACT");
4249         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4250         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4251         }
4252         return ("AC_UNKNOWN");
4253 }
4254
4255 static int
4256 xpt_async_size(u_int32_t async_code)
4257 {
4258
4259         switch (async_code) {
4260         case AC_BUS_RESET: return (0);
4261         case AC_UNSOL_RESEL: return (0);
4262         case AC_SCSI_AEN: return (0);
4263         case AC_SENT_BDR: return (0);
4264         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4265         case AC_PATH_DEREGISTERED: return (0);
4266         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4267         case AC_LOST_DEVICE: return (0);
4268         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4269         case AC_INQ_CHANGED: return (0);
4270         case AC_GETDEV_CHANGED: return (0);
4271         case AC_CONTRACT: return (sizeof(struct ac_contract));
4272         case AC_ADVINFO_CHANGED: return (-1);
4273         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4274         }
4275         return (0);
4276 }
4277
4278 static int
4279 xpt_async_process_dev(struct cam_ed *device, void *arg)
4280 {
4281         union ccb *ccb = arg;
4282         struct cam_path *path = ccb->ccb_h.path;
4283         void *async_arg = ccb->casync.async_arg_ptr;
4284         u_int32_t async_code = ccb->casync.async_code;
4285         int relock;
4286
4287         if (path->device != device
4288          && path->device->lun_id != CAM_LUN_WILDCARD
4289          && device->lun_id != CAM_LUN_WILDCARD)
4290                 return (1);
4291
4292         /*
4293          * The async callback could free the device.
4294          * If it is a broadcast async, it doesn't hold
4295          * device reference, so take our own reference.
4296          */
4297         xpt_acquire_device(device);
4298
4299         /*
4300          * If async for specific device is to be delivered to
4301          * the wildcard client, take the specific device lock.
4302          * XXX: We may need a way for client to specify it.
4303          */
4304         if ((device->lun_id == CAM_LUN_WILDCARD &&
4305              path->device->lun_id != CAM_LUN_WILDCARD) ||
4306             (device->target->target_id == CAM_TARGET_WILDCARD &&
4307              path->target->target_id != CAM_TARGET_WILDCARD) ||
4308             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4309              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4310                 mtx_unlock(&device->device_mtx);
4311                 xpt_path_lock(path);
4312                 relock = 1;
4313         } else
4314                 relock = 0;
4315
4316         (*(device->target->bus->xport->ops->async))(async_code,
4317             device->target->bus, device->target, device, async_arg);
4318         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4319
4320         if (relock) {
4321                 xpt_path_unlock(path);
4322                 mtx_lock(&device->device_mtx);
4323         }
4324         xpt_release_device(device);
4325         return (1);
4326 }
4327
4328 static int
4329 xpt_async_process_tgt(struct cam_et *target, void *arg)
4330 {
4331         union ccb *ccb = arg;
4332         struct cam_path *path = ccb->ccb_h.path;
4333
4334         if (path->target != target
4335          && path->target->target_id != CAM_TARGET_WILDCARD
4336          && target->target_id != CAM_TARGET_WILDCARD)
4337                 return (1);
4338
4339         if (ccb->casync.async_code == AC_SENT_BDR) {
4340                 /* Update our notion of when the last reset occurred */
4341                 microtime(&target->last_reset);
4342         }
4343
4344         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4345 }
4346
4347 static void
4348 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4349 {
4350         struct cam_eb *bus;
4351         struct cam_path *path;
4352         void *async_arg;
4353         u_int32_t async_code;
4354
4355         path = ccb->ccb_h.path;
4356         async_code = ccb->casync.async_code;
4357         async_arg = ccb->casync.async_arg_ptr;
4358         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4359             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4360         bus = path->bus;
4361
4362         if (async_code == AC_BUS_RESET) {
4363                 /* Update our notion of when the last reset occurred */
4364                 microtime(&bus->last_reset);
4365         }
4366
4367         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4368
4369         /*
4370          * If this wasn't a fully wildcarded async, tell all
4371          * clients that want all async events.
4372          */
4373         if (bus != xpt_periph->path->bus) {
4374                 xpt_path_lock(xpt_periph->path);
4375                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4376                 xpt_path_unlock(xpt_periph->path);
4377         }
4378
4379         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4380                 xpt_release_devq(path, 1, TRUE);
4381         else
4382                 xpt_release_simq(path->bus->sim, TRUE);
4383         if (ccb->casync.async_arg_size > 0)
4384                 free(async_arg, M_CAMXPT);
4385         xpt_free_path(path);
4386         xpt_free_ccb(ccb);
4387 }
4388
4389 static void
4390 xpt_async_bcast(struct async_list *async_head,
4391                 u_int32_t async_code,
4392                 struct cam_path *path, void *async_arg)
4393 {
4394         struct async_node *cur_entry;
4395         struct mtx *mtx;
4396
4397         cur_entry = SLIST_FIRST(async_head);
4398         while (cur_entry != NULL) {
4399                 struct async_node *next_entry;
4400                 /*
4401                  * Grab the next list entry before we call the current
4402                  * entry's callback.  This is because the callback function
4403                  * can delete its async callback entry.
4404                  */
4405                 next_entry = SLIST_NEXT(cur_entry, links);
4406                 if ((cur_entry->event_enable & async_code) != 0) {
4407                         mtx = cur_entry->event_lock ?
4408                             path->device->sim->mtx : NULL;
4409                         if (mtx)
4410                                 mtx_lock(mtx);
4411                         cur_entry->callback(cur_entry->callback_arg,
4412                                             async_code, path,
4413                                             async_arg);
4414                         if (mtx)
4415                                 mtx_unlock(mtx);
4416                 }
4417                 cur_entry = next_entry;
4418         }
4419 }
4420
4421 void
4422 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4423 {
4424         union ccb *ccb;
4425         int size;
4426
4427         ccb = xpt_alloc_ccb_nowait();
4428         if (ccb == NULL) {
4429                 xpt_print(path, "Can't allocate CCB to send %s\n",
4430                     xpt_async_string(async_code));
4431                 return;
4432         }
4433
4434         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4435                 xpt_print(path, "Can't allocate path to send %s\n",
4436                     xpt_async_string(async_code));
4437                 xpt_free_ccb(ccb);
4438                 return;
4439         }
4440         ccb->ccb_h.path->periph = NULL;
4441         ccb->ccb_h.func_code = XPT_ASYNC;
4442         ccb->ccb_h.cbfcnp = xpt_async_process;
4443         ccb->ccb_h.flags |= CAM_UNLOCKED;
4444         ccb->casync.async_code = async_code;
4445         ccb->casync.async_arg_size = 0;
4446         size = xpt_async_size(async_code);
4447         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
4448             ("xpt_async: func %#x %s aync_code %d %s\n",
4449                 ccb->ccb_h.func_code,
4450                 xpt_action_name(ccb->ccb_h.func_code),
4451                 async_code,
4452                 xpt_async_string(async_code)));
4453         if (size > 0 && async_arg != NULL) {
4454                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4455                 if (ccb->casync.async_arg_ptr == NULL) {
4456                         xpt_print(path, "Can't allocate argument to send %s\n",
4457                             xpt_async_string(async_code));
4458                         xpt_free_path(ccb->ccb_h.path);
4459                         xpt_free_ccb(ccb);
4460                         return;
4461                 }
4462                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4463                 ccb->casync.async_arg_size = size;
4464         } else if (size < 0) {
4465                 ccb->casync.async_arg_ptr = async_arg;
4466                 ccb->casync.async_arg_size = size;
4467         }
4468         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4469                 xpt_freeze_devq(path, 1);
4470         else
4471                 xpt_freeze_simq(path->bus->sim, 1);
4472         xpt_done(ccb);
4473 }
4474
4475 static void
4476 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4477                       struct cam_et *target, struct cam_ed *device,
4478                       void *async_arg)
4479 {
4480
4481         /*
4482          * We only need to handle events for real devices.
4483          */
4484         if (target->target_id == CAM_TARGET_WILDCARD
4485          || device->lun_id == CAM_LUN_WILDCARD)
4486                 return;
4487
4488         printf("%s called\n", __func__);
4489 }
4490
4491 static uint32_t
4492 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4493 {
4494         struct cam_devq *devq;
4495         uint32_t freeze;
4496
4497         devq = dev->sim->devq;
4498         mtx_assert(&devq->send_mtx, MA_OWNED);
4499         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4500             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4501             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4502         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4503         /* Remove frozen device from sendq. */
4504         if (device_is_queued(dev))
4505                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4506         return (freeze);
4507 }
4508
4509 u_int32_t
4510 xpt_freeze_devq(struct cam_path *path, u_int count)
4511 {
4512         struct cam_ed   *dev = path->device;
4513         struct cam_devq *devq;
4514         uint32_t         freeze;
4515
4516         devq = dev->sim->devq;
4517         mtx_lock(&devq->send_mtx);
4518         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4519         freeze = xpt_freeze_devq_device(dev, count);
4520         mtx_unlock(&devq->send_mtx);
4521         return (freeze);
4522 }
4523
4524 u_int32_t
4525 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4526 {
4527         struct cam_devq *devq;
4528         uint32_t         freeze;
4529
4530         devq = sim->devq;
4531         mtx_lock(&devq->send_mtx);
4532         freeze = (devq->send_queue.qfrozen_cnt += count);
4533         mtx_unlock(&devq->send_mtx);
4534         return (freeze);
4535 }
4536
4537 static void
4538 xpt_release_devq_timeout(void *arg)
4539 {
4540         struct cam_ed *dev;
4541         struct cam_devq *devq;
4542
4543         dev = (struct cam_ed *)arg;
4544         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4545         devq = dev->sim->devq;
4546         mtx_assert(&devq->send_mtx, MA_OWNED);
4547         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4548                 xpt_run_devq(devq);
4549 }
4550
4551 void
4552 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4553 {
4554         struct cam_ed *dev;
4555         struct cam_devq *devq;
4556
4557         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4558             count, run_queue));
4559         dev = path->device;
4560         devq = dev->sim->devq;
4561         mtx_lock(&devq->send_mtx);
4562         if (xpt_release_devq_device(dev, count, run_queue))
4563                 xpt_run_devq(dev->sim->devq);
4564         mtx_unlock(&devq->send_mtx);
4565 }
4566
4567 static int
4568 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4569 {
4570
4571         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4572         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4573             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4574             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4575         if (count > dev->ccbq.queue.qfrozen_cnt) {
4576 #ifdef INVARIANTS
4577                 printf("xpt_release_devq(): requested %u > present %u\n",
4578                     count, dev->ccbq.queue.qfrozen_cnt);
4579 #endif
4580                 count = dev->ccbq.queue.qfrozen_cnt;
4581         }
4582         dev->ccbq.queue.qfrozen_cnt -= count;
4583         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4584                 /*
4585                  * No longer need to wait for a successful
4586                  * command completion.
4587                  */
4588                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4589                 /*
4590                  * Remove any timeouts that might be scheduled
4591                  * to release this queue.
4592                  */
4593                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4594                         callout_stop(&dev->callout);
4595                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4596                 }
4597                 /*
4598                  * Now that we are unfrozen schedule the
4599                  * device so any pending transactions are
4600                  * run.
4601                  */
4602                 xpt_schedule_devq(dev->sim->devq, dev);
4603         } else
4604                 run_queue = 0;
4605         return (run_queue);
4606 }
4607
4608 void
4609 xpt_release_simq(struct cam_sim *sim, int run_queue)
4610 {
4611         struct cam_devq *devq;
4612
4613         devq = sim->devq;
4614         mtx_lock(&devq->send_mtx);
4615         if (devq->send_queue.qfrozen_cnt <= 0) {
4616 #ifdef INVARIANTS
4617                 printf("xpt_release_simq: requested 1 > present %u\n",
4618                     devq->send_queue.qfrozen_cnt);
4619 #endif
4620         } else
4621                 devq->send_queue.qfrozen_cnt--;
4622         if (devq->send_queue.qfrozen_cnt == 0) {
4623                 /*
4624                  * If there is a timeout scheduled to release this
4625                  * sim queue, remove it.  The queue frozen count is
4626                  * already at 0.
4627                  */
4628                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4629                         callout_stop(&sim->callout);
4630                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4631                 }
4632                 if (run_queue) {
4633                         /*
4634                          * Now that we are unfrozen run the send queue.
4635                          */
4636                         xpt_run_devq(sim->devq);
4637                 }
4638         }
4639         mtx_unlock(&devq->send_mtx);
4640 }
4641
4642 /*
4643  * XXX Appears to be unused.
4644  */
4645 static void
4646 xpt_release_simq_timeout(void *arg)
4647 {
4648         struct cam_sim *sim;
4649
4650         sim = (struct cam_sim *)arg;
4651         xpt_release_simq(sim, /* run_queue */ TRUE);
4652 }
4653
4654 void
4655 xpt_done(union ccb *done_ccb)
4656 {
4657         struct cam_doneq *queue;
4658         int     run, hash;
4659
4660 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4661         if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4662             done_ccb->csio.bio != NULL)
4663                 biotrack(done_ccb->csio.bio, __func__);
4664 #endif
4665
4666         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4667             ("xpt_done: func= %#x %s status %#x\n",
4668                 done_ccb->ccb_h.func_code,
4669                 xpt_action_name(done_ccb->ccb_h.func_code),
4670                 done_ccb->ccb_h.status));
4671         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4672                 return;
4673
4674         /* Store the time the ccb was in the sim */
4675         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4676         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4677             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4678         queue = &cam_doneqs[hash];
4679         mtx_lock(&queue->cam_doneq_mtx);
4680         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4681         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4682         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4683         mtx_unlock(&queue->cam_doneq_mtx);
4684         if (run)
4685                 wakeup(&queue->cam_doneq);
4686 }
4687
4688 void
4689 xpt_done_direct(union ccb *done_ccb)
4690 {
4691
4692         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4693             ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4694         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4695                 return;
4696
4697         /* Store the time the ccb was in the sim */
4698         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4699         xpt_done_process(&done_ccb->ccb_h);
4700 }
4701
4702 union ccb *
4703 xpt_alloc_ccb()
4704 {
4705         union ccb *new_ccb;
4706
4707         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4708         return (new_ccb);
4709 }
4710
4711 union ccb *
4712 xpt_alloc_ccb_nowait()
4713 {
4714         union ccb *new_ccb;
4715
4716         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4717         return (new_ccb);
4718 }
4719
4720 void
4721 xpt_free_ccb(union ccb *free_ccb)
4722 {
4723         free(free_ccb, M_CAMCCB);
4724 }
4725
4726
4727
4728 /* Private XPT functions */
4729
4730 /*
4731  * Get a CAM control block for the caller. Charge the structure to the device
4732  * referenced by the path.  If we don't have sufficient resources to allocate
4733  * more ccbs, we return NULL.
4734  */
4735 static union ccb *
4736 xpt_get_ccb_nowait(struct cam_periph *periph)
4737 {
4738         union ccb *new_ccb;
4739
4740         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4741         if (new_ccb == NULL)
4742                 return (NULL);
4743         periph->periph_allocated++;
4744         cam_ccbq_take_opening(&periph->path->device->ccbq);
4745         return (new_ccb);
4746 }
4747
4748 static union ccb *
4749 xpt_get_ccb(struct cam_periph *periph)
4750 {
4751         union ccb *new_ccb;
4752
4753         cam_periph_unlock(periph);
4754         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4755         cam_periph_lock(periph);
4756         periph->periph_allocated++;
4757         cam_ccbq_take_opening(&periph->path->device->ccbq);
4758         return (new_ccb);
4759 }
4760
4761 union ccb *
4762 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4763 {
4764         struct ccb_hdr *ccb_h;
4765
4766         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4767         cam_periph_assert(periph, MA_OWNED);
4768         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4769             ccb_h->pinfo.priority != priority) {
4770                 if (priority < periph->immediate_priority) {
4771                         periph->immediate_priority = priority;
4772                         xpt_run_allocq(periph, 0);
4773                 } else
4774                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4775                             "cgticb", 0);
4776         }
4777         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4778         return ((union ccb *)ccb_h);
4779 }
4780
4781 static void
4782 xpt_acquire_bus(struct cam_eb *bus)
4783 {
4784
4785         xpt_lock_buses();
4786         bus->refcount++;
4787         xpt_unlock_buses();
4788 }
4789
4790 static void
4791 xpt_release_bus(struct cam_eb *bus)
4792 {
4793
4794         xpt_lock_buses();
4795         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4796         if (--bus->refcount > 0) {
4797                 xpt_unlock_buses();
4798                 return;
4799         }
4800         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4801         xsoftc.bus_generation++;
4802         xpt_unlock_buses();
4803         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4804             ("destroying bus, but target list is not empty"));
4805         cam_sim_release(bus->sim);
4806         mtx_destroy(&bus->eb_mtx);
4807         free(bus, M_CAMXPT);
4808 }
4809
4810 static struct cam_et *
4811 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4812 {
4813         struct cam_et *cur_target, *target;
4814
4815         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4816         mtx_assert(&bus->eb_mtx, MA_OWNED);
4817         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4818                                          M_NOWAIT|M_ZERO);
4819         if (target == NULL)
4820                 return (NULL);
4821
4822         TAILQ_INIT(&target->ed_entries);
4823         target->bus = bus;
4824         target->target_id = target_id;
4825         target->refcount = 1;
4826         target->generation = 0;
4827         target->luns = NULL;
4828         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4829         timevalclear(&target->last_reset);
4830         /*
4831          * Hold a reference to our parent bus so it
4832          * will not go away before we do.
4833          */
4834         bus->refcount++;
4835
4836         /* Insertion sort into our bus's target list */
4837         cur_target = TAILQ_FIRST(&bus->et_entries);
4838         while (cur_target != NULL && cur_target->target_id < target_id)
4839                 cur_target = TAILQ_NEXT(cur_target, links);
4840         if (cur_target != NULL) {
4841                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4842         } else {
4843                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4844         }
4845         bus->generation++;
4846         return (target);
4847 }
4848
4849 static void
4850 xpt_acquire_target(struct cam_et *target)
4851 {
4852         struct cam_eb *bus = target->bus;
4853
4854         mtx_lock(&bus->eb_mtx);
4855         target->refcount++;
4856         mtx_unlock(&bus->eb_mtx);
4857 }
4858
4859 static void
4860 xpt_release_target(struct cam_et *target)
4861 {
4862         struct cam_eb *bus = target->bus;
4863
4864         mtx_lock(&bus->eb_mtx);
4865         if (--target->refcount > 0) {
4866                 mtx_unlock(&bus->eb_mtx);
4867                 return;
4868         }
4869         TAILQ_REMOVE(&bus->et_entries, target, links);
4870         bus->generation++;
4871         mtx_unlock(&bus->eb_mtx);
4872         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4873             ("destroying target, but device list is not empty"));
4874         xpt_release_bus(bus);
4875         mtx_destroy(&target->luns_mtx);
4876         if (target->luns)
4877                 free(target->luns, M_CAMXPT);
4878         free(target, M_CAMXPT);
4879 }
4880
4881 static struct cam_ed *
4882 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4883                          lun_id_t lun_id)
4884 {
4885         struct cam_ed *device;
4886
4887         device = xpt_alloc_device(bus, target, lun_id);
4888         if (device == NULL)
4889                 return (NULL);
4890
4891         device->mintags = 1;
4892         device->maxtags = 1;
4893         return (device);
4894 }
4895
4896 static void
4897 xpt_destroy_device(void *context, int pending)
4898 {
4899         struct cam_ed   *device = context;
4900
4901         mtx_lock(&device->device_mtx);
4902         mtx_destroy(&device->device_mtx);
4903         free(device, M_CAMDEV);
4904 }
4905
4906 struct cam_ed *
4907 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4908 {
4909         struct cam_ed   *cur_device, *device;
4910         struct cam_devq *devq;
4911         cam_status status;
4912
4913         mtx_assert(&bus->eb_mtx, MA_OWNED);
4914         /* Make space for us in the device queue on our bus */
4915         devq = bus->sim->devq;
4916         mtx_lock(&devq->send_mtx);
4917         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4918         mtx_unlock(&devq->send_mtx);
4919         if (status != CAM_REQ_CMP)
4920                 return (NULL);
4921
4922         device = (struct cam_ed *)malloc(sizeof(*device),
4923                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4924         if (device == NULL)
4925                 return (NULL);
4926
4927         cam_init_pinfo(&device->devq_entry);
4928         device->target = target;
4929         device->lun_id = lun_id;
4930         device->sim = bus->sim;
4931         if (cam_ccbq_init(&device->ccbq,
4932                           bus->sim->max_dev_openings) != 0) {
4933                 free(device, M_CAMDEV);
4934                 return (NULL);
4935         }
4936         SLIST_INIT(&device->asyncs);
4937         SLIST_INIT(&device->periphs);
4938         device->generation = 0;
4939         device->flags = CAM_DEV_UNCONFIGURED;
4940         device->tag_delay_count = 0;
4941         device->tag_saved_openings = 0;
4942         device->refcount = 1;
4943         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4944         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4945         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4946         /*
4947          * Hold a reference to our parent bus so it
4948          * will not go away before we do.
4949          */
4950         target->refcount++;
4951
4952         cur_device = TAILQ_FIRST(&target->ed_entries);
4953         while (cur_device != NULL && cur_device->lun_id < lun_id)
4954                 cur_device = TAILQ_NEXT(cur_device, links);
4955         if (cur_device != NULL)
4956                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4957         else
4958                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4959         target->generation++;
4960         return (device);
4961 }
4962
4963 void
4964 xpt_acquire_device(struct cam_ed *device)
4965 {
4966         struct cam_eb *bus = device->target->bus;
4967
4968         mtx_lock(&bus->eb_mtx);
4969         device->refcount++;
4970         mtx_unlock(&bus->eb_mtx);
4971 }
4972
4973 void
4974 xpt_release_device(struct cam_ed *device)
4975 {
4976         struct cam_eb *bus = device->target->bus;
4977         struct cam_devq *devq;
4978
4979         mtx_lock(&bus->eb_mtx);
4980         if (--device->refcount > 0) {
4981                 mtx_unlock(&bus->eb_mtx);
4982                 return;
4983         }
4984
4985         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4986         device->target->generation++;
4987         mtx_unlock(&bus->eb_mtx);
4988
4989         /* Release our slot in the devq */
4990         devq = bus->sim->devq;
4991         mtx_lock(&devq->send_mtx);
4992         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4993         mtx_unlock(&devq->send_mtx);
4994
4995         KASSERT(SLIST_EMPTY(&device->periphs),
4996             ("destroying device, but periphs list is not empty"));
4997         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4998             ("destroying device while still queued for ccbs"));
4999
5000         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
5001                 callout_stop(&device->callout);
5002
5003         xpt_release_target(device->target);
5004
5005         cam_ccbq_fini(&device->ccbq);
5006         /*
5007          * Free allocated memory.  free(9) does nothing if the
5008          * supplied pointer is NULL, so it is safe to call without
5009          * checking.
5010          */
5011         free(device->supported_vpds, M_CAMXPT);
5012         free(device->device_id, M_CAMXPT);
5013         free(device->ext_inq, M_CAMXPT);
5014         free(device->physpath, M_CAMXPT);
5015         free(device->rcap_buf, M_CAMXPT);
5016         free(device->serial_num, M_CAMXPT);
5017         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
5018 }
5019
5020 u_int32_t
5021 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
5022 {
5023         int     result;
5024         struct  cam_ed *dev;
5025
5026         dev = path->device;
5027         mtx_lock(&dev->sim->devq->send_mtx);
5028         result = cam_ccbq_resize(&dev->ccbq, newopenings);
5029         mtx_unlock(&dev->sim->devq->send_mtx);
5030         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5031          || (dev->inq_flags & SID_CmdQue) != 0)
5032                 dev->tag_saved_openings = newopenings;
5033         return (result);
5034 }
5035
5036 static struct cam_eb *
5037 xpt_find_bus(path_id_t path_id)
5038 {
5039         struct cam_eb *bus;
5040
5041         xpt_lock_buses();
5042         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
5043              bus != NULL;
5044              bus = TAILQ_NEXT(bus, links)) {
5045                 if (bus->path_id == path_id) {
5046                         bus->refcount++;
5047                         break;
5048                 }
5049         }
5050         xpt_unlock_buses();
5051         return (bus);
5052 }
5053
5054 static struct cam_et *
5055 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5056 {
5057         struct cam_et *target;
5058
5059         mtx_assert(&bus->eb_mtx, MA_OWNED);
5060         for (target = TAILQ_FIRST(&bus->et_entries);
5061              target != NULL;
5062              target = TAILQ_NEXT(target, links)) {
5063                 if (target->target_id == target_id) {
5064                         target->refcount++;
5065                         break;
5066                 }
5067         }
5068         return (target);
5069 }
5070
5071 static struct cam_ed *
5072 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5073 {
5074         struct cam_ed *device;
5075
5076         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
5077         for (device = TAILQ_FIRST(&target->ed_entries);
5078              device != NULL;
5079              device = TAILQ_NEXT(device, links)) {
5080                 if (device->lun_id == lun_id) {
5081                         device->refcount++;
5082                         break;
5083                 }
5084         }
5085         return (device);
5086 }
5087
5088 void
5089 xpt_start_tags(struct cam_path *path)
5090 {
5091         struct ccb_relsim crs;
5092         struct cam_ed *device;
5093         struct cam_sim *sim;
5094         int    newopenings;
5095
5096         device = path->device;
5097         sim = path->bus->sim;
5098         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5099         xpt_freeze_devq(path, /*count*/1);
5100         device->inq_flags |= SID_CmdQue;
5101         if (device->tag_saved_openings != 0)
5102                 newopenings = device->tag_saved_openings;
5103         else
5104                 newopenings = min(device->maxtags,
5105                                   sim->max_tagged_dev_openings);
5106         xpt_dev_ccbq_resize(path, newopenings);
5107         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5108         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5109         crs.ccb_h.func_code = XPT_REL_SIMQ;
5110         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5111         crs.openings
5112             = crs.release_timeout
5113             = crs.qfrozen_cnt
5114             = 0;
5115         xpt_action((union ccb *)&crs);
5116 }
5117
5118 void
5119 xpt_stop_tags(struct cam_path *path)
5120 {
5121         struct ccb_relsim crs;
5122         struct cam_ed *device;
5123         struct cam_sim *sim;
5124
5125         device = path->device;
5126         sim = path->bus->sim;
5127         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5128         device->tag_delay_count = 0;
5129         xpt_freeze_devq(path, /*count*/1);
5130         device->inq_flags &= ~SID_CmdQue;
5131         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
5132         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5133         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5134         crs.ccb_h.func_code = XPT_REL_SIMQ;
5135         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5136         crs.openings
5137             = crs.release_timeout
5138             = crs.qfrozen_cnt
5139             = 0;
5140         xpt_action((union ccb *)&crs);
5141 }
5142
5143 static void
5144 xpt_boot_delay(void *arg)
5145 {
5146
5147         xpt_release_boot();
5148 }
5149
5150 static void
5151 xpt_config(void *arg)
5152 {
5153         /*
5154          * Now that interrupts are enabled, go find our devices
5155          */
5156         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
5157                 printf("xpt_config: failed to create taskqueue thread.\n");
5158
5159         /* Setup debugging path */
5160         if (cam_dflags != CAM_DEBUG_NONE) {
5161                 if (xpt_create_path(&cam_dpath, NULL,
5162                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
5163                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
5164                         printf("xpt_config: xpt_create_path() failed for debug"
5165                                " target %d:%d:%d, debugging disabled\n",
5166                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
5167                         cam_dflags = CAM_DEBUG_NONE;
5168                 }
5169         } else
5170                 cam_dpath = NULL;
5171
5172         periphdriver_init(1);
5173         xpt_hold_boot();
5174         callout_init(&xsoftc.boot_callout, 1);
5175         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5176             xpt_boot_delay, NULL, 0);
5177         /* Fire up rescan thread. */
5178         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5179             "cam", "scanner")) {
5180                 printf("xpt_config: failed to create rescan thread.\n");
5181         }
5182 }
5183
5184 void
5185 xpt_hold_boot(void)
5186 {
5187         xpt_lock_buses();
5188         xsoftc.buses_to_config++;
5189         xpt_unlock_buses();
5190 }
5191
5192 void
5193 xpt_release_boot(void)
5194 {
5195         xpt_lock_buses();
5196         xsoftc.buses_to_config--;
5197         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
5198                 struct  xpt_task *task;
5199
5200                 xsoftc.buses_config_done = 1;
5201                 xpt_unlock_buses();
5202                 /* Call manually because we don't have any buses */
5203                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
5204                 if (task != NULL) {
5205                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
5206                         taskqueue_enqueue(taskqueue_thread, &task->task);
5207                 }
5208         } else
5209                 xpt_unlock_buses();
5210 }
5211
5212 /*
5213  * If the given device only has one peripheral attached to it, and if that
5214  * peripheral is the passthrough driver, announce it.  This insures that the
5215  * user sees some sort of announcement for every peripheral in their system.
5216  */
5217 static int
5218 xptpassannouncefunc(struct cam_ed *device, void *arg)
5219 {
5220         struct cam_periph *periph;
5221         int i;
5222
5223         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5224              periph = SLIST_NEXT(periph, periph_links), i++);
5225
5226         periph = SLIST_FIRST(&device->periphs);
5227         if ((i == 1)
5228          && (strncmp(periph->periph_name, "pass", 4) == 0))
5229                 xpt_announce_periph(periph, NULL);
5230
5231         return(1);
5232 }
5233
5234 static void
5235 xpt_finishconfig_task(void *context, int pending)
5236 {
5237
5238         periphdriver_init(2);
5239         /*
5240          * Check for devices with no "standard" peripheral driver
5241          * attached.  For any devices like that, announce the
5242          * passthrough driver so the user will see something.
5243          */
5244         if (!bootverbose)
5245                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5246
5247         /* Release our hook so that the boot can continue. */
5248         config_intrhook_disestablish(xsoftc.xpt_config_hook);
5249         free(xsoftc.xpt_config_hook, M_CAMXPT);
5250         xsoftc.xpt_config_hook = NULL;
5251
5252         free(context, M_CAMXPT);
5253 }
5254
5255 cam_status
5256 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5257                    struct cam_path *path)
5258 {
5259         struct ccb_setasync csa;
5260         cam_status status;
5261         int xptpath = 0;
5262
5263         if (path == NULL) {
5264                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5265                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5266                 if (status != CAM_REQ_CMP)
5267                         return (status);
5268                 xpt_path_lock(path);
5269                 xptpath = 1;
5270         }
5271
5272         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5273         csa.ccb_h.func_code = XPT_SASYNC_CB;
5274         csa.event_enable = event;
5275         csa.callback = cbfunc;
5276         csa.callback_arg = cbarg;
5277         xpt_action((union ccb *)&csa);
5278         status = csa.ccb_h.status;
5279
5280         CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5281             ("xpt_register_async: func %p\n", cbfunc));
5282
5283         if (xptpath) {
5284                 xpt_path_unlock(path);
5285                 xpt_free_path(path);
5286         }
5287
5288         if ((status == CAM_REQ_CMP) &&
5289             (csa.event_enable & AC_FOUND_DEVICE)) {
5290                 /*
5291                  * Get this peripheral up to date with all
5292                  * the currently existing devices.
5293                  */
5294                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5295         }
5296         if ((status == CAM_REQ_CMP) &&
5297             (csa.event_enable & AC_PATH_REGISTERED)) {
5298                 /*
5299                  * Get this peripheral up to date with all
5300                  * the currently existing buses.
5301                  */
5302                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5303         }
5304
5305         return (status);
5306 }
5307
5308 static void
5309 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5310 {
5311         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5312
5313         switch (work_ccb->ccb_h.func_code) {
5314         /* Common cases first */
5315         case XPT_PATH_INQ:              /* Path routing inquiry */
5316         {
5317                 struct ccb_pathinq *cpi;
5318
5319                 cpi = &work_ccb->cpi;
5320                 cpi->version_num = 1; /* XXX??? */
5321                 cpi->hba_inquiry = 0;
5322                 cpi->target_sprt = 0;
5323                 cpi->hba_misc = 0;
5324                 cpi->hba_eng_cnt = 0;
5325                 cpi->max_target = 0;
5326                 cpi->max_lun = 0;
5327                 cpi->initiator_id = 0;
5328                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5329                 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5330                 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5331                 cpi->unit_number = sim->unit_number;
5332                 cpi->bus_id = sim->bus_id;
5333                 cpi->base_transfer_speed = 0;
5334                 cpi->protocol = PROTO_UNSPECIFIED;
5335                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5336                 cpi->transport = XPORT_UNSPECIFIED;
5337                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5338                 cpi->ccb_h.status = CAM_REQ_CMP;
5339                 xpt_done(work_ccb);
5340                 break;
5341         }
5342         default:
5343                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5344                 xpt_done(work_ccb);
5345                 break;
5346         }
5347 }
5348
5349 /*
5350  * The xpt as a "controller" has no interrupt sources, so polling
5351  * is a no-op.
5352  */
5353 static void
5354 xptpoll(struct cam_sim *sim)
5355 {
5356 }
5357
5358 void
5359 xpt_lock_buses(void)
5360 {
5361         mtx_lock(&xsoftc.xpt_topo_lock);
5362 }
5363
5364 void
5365 xpt_unlock_buses(void)
5366 {
5367         mtx_unlock(&xsoftc.xpt_topo_lock);
5368 }
5369
5370 struct mtx *
5371 xpt_path_mtx(struct cam_path *path)
5372 {
5373
5374         return (&path->device->device_mtx);
5375 }
5376
5377 static void
5378 xpt_done_process(struct ccb_hdr *ccb_h)
5379 {
5380         struct cam_sim *sim;
5381         struct cam_devq *devq;
5382         struct mtx *mtx = NULL;
5383
5384 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5385         struct ccb_scsiio *csio;
5386
5387         if (ccb_h->func_code == XPT_SCSI_IO) {
5388                 csio = &((union ccb *)ccb_h)->csio;
5389                 if (csio->bio != NULL)
5390                         biotrack(csio->bio, __func__);
5391         }
5392 #endif
5393
5394         if (ccb_h->flags & CAM_HIGH_POWER) {
5395                 struct highpowerlist    *hphead;
5396                 struct cam_ed           *device;
5397
5398                 mtx_lock(&xsoftc.xpt_highpower_lock);
5399                 hphead = &xsoftc.highpowerq;
5400
5401                 device = STAILQ_FIRST(hphead);
5402
5403                 /*
5404                  * Increment the count since this command is done.
5405                  */
5406                 xsoftc.num_highpower++;
5407
5408                 /*
5409                  * Any high powered commands queued up?
5410                  */
5411                 if (device != NULL) {
5412
5413                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5414                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5415
5416                         mtx_lock(&device->sim->devq->send_mtx);
5417                         xpt_release_devq_device(device,
5418                                          /*count*/1, /*runqueue*/TRUE);
5419                         mtx_unlock(&device->sim->devq->send_mtx);
5420                 } else
5421                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5422         }
5423
5424         sim = ccb_h->path->bus->sim;
5425
5426         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5427                 xpt_release_simq(sim, /*run_queue*/FALSE);
5428                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5429         }
5430
5431         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5432          && (ccb_h->status & CAM_DEV_QFRZN)) {
5433                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5434                 ccb_h->status &= ~CAM_DEV_QFRZN;
5435         }
5436
5437         devq = sim->devq;
5438         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5439                 struct cam_ed *dev = ccb_h->path->device;
5440
5441                 mtx_lock(&devq->send_mtx);
5442                 devq->send_active--;
5443                 devq->send_openings++;
5444                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5445
5446                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5447                   && (dev->ccbq.dev_active == 0))) {
5448                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5449                         xpt_release_devq_device(dev, /*count*/1,
5450                                          /*run_queue*/FALSE);
5451                 }
5452
5453                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5454                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5455                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5456                         xpt_release_devq_device(dev, /*count*/1,
5457                                          /*run_queue*/FALSE);
5458                 }
5459
5460                 if (!device_is_queued(dev))
5461                         (void)xpt_schedule_devq(devq, dev);
5462                 xpt_run_devq(devq);
5463                 mtx_unlock(&devq->send_mtx);
5464
5465                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5466                         mtx = xpt_path_mtx(ccb_h->path);
5467                         mtx_lock(mtx);
5468
5469                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5470                          && (--dev->tag_delay_count == 0))
5471                                 xpt_start_tags(ccb_h->path);
5472                 }
5473         }
5474
5475         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5476                 if (mtx == NULL) {
5477                         mtx = xpt_path_mtx(ccb_h->path);
5478                         mtx_lock(mtx);
5479                 }
5480         } else {
5481                 if (mtx != NULL) {
5482                         mtx_unlock(mtx);
5483                         mtx = NULL;
5484                 }
5485         }
5486
5487         /* Call the peripheral driver's callback */
5488         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5489         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5490         if (mtx != NULL)
5491                 mtx_unlock(mtx);
5492 }
5493
5494 void
5495 xpt_done_td(void *arg)
5496 {
5497         struct cam_doneq *queue = arg;
5498         struct ccb_hdr *ccb_h;
5499         STAILQ_HEAD(, ccb_hdr)  doneq;
5500
5501         STAILQ_INIT(&doneq);
5502         mtx_lock(&queue->cam_doneq_mtx);
5503         while (1) {
5504                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5505                         queue->cam_doneq_sleep = 1;
5506                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5507                             PRIBIO, "-", 0);
5508                         queue->cam_doneq_sleep = 0;
5509                 }
5510                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5511                 mtx_unlock(&queue->cam_doneq_mtx);
5512
5513                 THREAD_NO_SLEEPING();
5514                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5515                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5516                         xpt_done_process(ccb_h);
5517                 }
5518                 THREAD_SLEEPING_OK();
5519
5520                 mtx_lock(&queue->cam_doneq_mtx);
5521         }
5522 }
5523
5524 static void
5525 camisr_runqueue(void)
5526 {
5527         struct  ccb_hdr *ccb_h;
5528         struct cam_doneq *queue;
5529         int i;
5530
5531         /* Process global queues. */
5532         for (i = 0; i < cam_num_doneqs; i++) {
5533                 queue = &cam_doneqs[i];
5534                 mtx_lock(&queue->cam_doneq_mtx);
5535                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5536                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5537                         mtx_unlock(&queue->cam_doneq_mtx);
5538                         xpt_done_process(ccb_h);
5539                         mtx_lock(&queue->cam_doneq_mtx);
5540                 }
5541                 mtx_unlock(&queue->cam_doneq_mtx);
5542         }
5543 }
5544
5545 struct kv
5546 {
5547         uint32_t v;
5548         const char *name;
5549 };
5550
5551 static struct kv map[] = {
5552         { XPT_NOOP, "XPT_NOOP" },
5553         { XPT_SCSI_IO, "XPT_SCSI_IO" },
5554         { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5555         { XPT_GDEVLIST, "XPT_GDEVLIST" },
5556         { XPT_PATH_INQ, "XPT_PATH_INQ" },
5557         { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5558         { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5559         { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5560         { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5561         { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5562         { XPT_DEBUG, "XPT_DEBUG" },
5563         { XPT_PATH_STATS, "XPT_PATH_STATS" },
5564         { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5565         { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5566         { XPT_ASYNC, "XPT_ASYNC" },
5567         { XPT_ABORT, "XPT_ABORT" },
5568         { XPT_RESET_BUS, "XPT_RESET_BUS" },
5569         { XPT_RESET_DEV, "XPT_RESET_DEV" },
5570         { XPT_TERM_IO, "XPT_TERM_IO" },
5571         { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5572         { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5573         { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5574         { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5575         { XPT_ATA_IO, "XPT_ATA_IO" },
5576         { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5577         { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5578         { XPT_NVME_IO, "XPT_NVME_IO" },
5579         { XPT_MMC_IO, "XPT_MMC_IO" },
5580         { XPT_SMP_IO, "XPT_SMP_IO" },
5581         { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5582         { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" },
5583         { XPT_ENG_INQ, "XPT_ENG_INQ" },
5584         { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5585         { XPT_EN_LUN, "XPT_EN_LUN" },
5586         { XPT_TARGET_IO, "XPT_TARGET_IO" },
5587         { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5588         { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5589         { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5590         { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5591         { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5592         { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5593         { 0, 0 }
5594 };
5595
5596 const char *
5597 xpt_action_name(uint32_t action)
5598 {
5599         static char buffer[32]; /* Only for unknown messages -- racy */
5600         struct kv *walker = map;
5601
5602         while (walker->name != NULL) {
5603                 if (walker->v == action)
5604                         return (walker->name);
5605                 walker++;
5606         }
5607
5608         snprintf(buffer, sizeof(buffer), "%#x", action);
5609         return (buffer);
5610 }