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
1913                 /* Let the user know whether this device is unconfigured */
1914                 if (device->flags & CAM_DEV_UNCONFIGURED)
1915                         cdm->matches[j].result.device_result.flags =
1916                                 DEV_RESULT_UNCONFIGURED;
1917                 else
1918                         cdm->matches[j].result.device_result.flags =
1919                                 DEV_RESULT_NOFLAG;
1920         }
1921
1922         /*
1923          * If the user isn't interested in peripherals, don't descend
1924          * the tree any further.
1925          */
1926         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1927                 return(1);
1928
1929         /*
1930          * If there is a peripheral list generation recorded, make sure
1931          * it hasn't changed.
1932          */
1933         xpt_lock_buses();
1934         mtx_lock(&bus->eb_mtx);
1935         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1936          && (cdm->pos.cookie.bus == bus)
1937          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1938          && (cdm->pos.cookie.target == device->target)
1939          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1940          && (cdm->pos.cookie.device == device)
1941          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1942          && (cdm->pos.cookie.periph != NULL)) {
1943                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1944                     device->generation) {
1945                         mtx_unlock(&bus->eb_mtx);
1946                         xpt_unlock_buses();
1947                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1948                         return(0);
1949                 }
1950                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1951                 periph->refcount++;
1952         } else
1953                 periph = NULL;
1954         mtx_unlock(&bus->eb_mtx);
1955         xpt_unlock_buses();
1956
1957         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1958 }
1959
1960 static int
1961 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1962 {
1963         struct ccb_dev_match *cdm;
1964         dev_match_ret retval;
1965
1966         cdm = (struct ccb_dev_match *)arg;
1967
1968         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1969
1970         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1971                 cdm->status = CAM_DEV_MATCH_ERROR;
1972                 return(0);
1973         }
1974
1975         /*
1976          * If the copy flag is set, copy this peripheral out.
1977          */
1978         if (retval & DM_RET_COPY) {
1979                 int spaceleft, j;
1980                 size_t l;
1981
1982                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1983                         sizeof(struct dev_match_result));
1984
1985                 /*
1986                  * If we don't have enough space to put in another
1987                  * match result, save our position and tell the
1988                  * user there are more devices to check.
1989                  */
1990                 if (spaceleft < sizeof(struct dev_match_result)) {
1991                         bzero(&cdm->pos, sizeof(cdm->pos));
1992                         cdm->pos.position_type =
1993                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1994                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1995                                 CAM_DEV_POS_PERIPH;
1996
1997                         cdm->pos.cookie.bus = periph->path->bus;
1998                         cdm->pos.generations[CAM_BUS_GENERATION]=
1999                                 xsoftc.bus_generation;
2000                         cdm->pos.cookie.target = periph->path->target;
2001                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2002                                 periph->path->bus->generation;
2003                         cdm->pos.cookie.device = periph->path->device;
2004                         cdm->pos.generations[CAM_DEV_GENERATION] =
2005                                 periph->path->target->generation;
2006                         cdm->pos.cookie.periph = periph;
2007                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2008                                 periph->path->device->generation;
2009                         cdm->status = CAM_DEV_MATCH_MORE;
2010                         return(0);
2011                 }
2012
2013                 j = cdm->num_matches;
2014                 cdm->num_matches++;
2015                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2016                 cdm->matches[j].result.periph_result.path_id =
2017                         periph->path->bus->path_id;
2018                 cdm->matches[j].result.periph_result.target_id =
2019                         periph->path->target->target_id;
2020                 cdm->matches[j].result.periph_result.target_lun =
2021                         periph->path->device->lun_id;
2022                 cdm->matches[j].result.periph_result.unit_number =
2023                         periph->unit_number;
2024                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2025                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2026                         periph->periph_name, l);
2027         }
2028
2029         return(1);
2030 }
2031
2032 static int
2033 xptedtmatch(struct ccb_dev_match *cdm)
2034 {
2035         struct cam_eb *bus;
2036         int ret;
2037
2038         cdm->num_matches = 0;
2039
2040         /*
2041          * Check the bus list generation.  If it has changed, the user
2042          * needs to reset everything and start over.
2043          */
2044         xpt_lock_buses();
2045         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2046          && (cdm->pos.cookie.bus != NULL)) {
2047                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
2048                     xsoftc.bus_generation) {
2049                         xpt_unlock_buses();
2050                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2051                         return(0);
2052                 }
2053                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
2054                 bus->refcount++;
2055         } else
2056                 bus = NULL;
2057         xpt_unlock_buses();
2058
2059         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
2060
2061         /*
2062          * If we get back 0, that means that we had to stop before fully
2063          * traversing the EDT.  It also means that one of the subroutines
2064          * has set the status field to the proper value.  If we get back 1,
2065          * we've fully traversed the EDT and copied out any matching entries.
2066          */
2067         if (ret == 1)
2068                 cdm->status = CAM_DEV_MATCH_LAST;
2069
2070         return(ret);
2071 }
2072
2073 static int
2074 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2075 {
2076         struct cam_periph *periph;
2077         struct ccb_dev_match *cdm;
2078
2079         cdm = (struct ccb_dev_match *)arg;
2080
2081         xpt_lock_buses();
2082         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2083          && (cdm->pos.cookie.pdrv == pdrv)
2084          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2085          && (cdm->pos.cookie.periph != NULL)) {
2086                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2087                     (*pdrv)->generation) {
2088                         xpt_unlock_buses();
2089                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2090                         return(0);
2091                 }
2092                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
2093                 periph->refcount++;
2094         } else
2095                 periph = NULL;
2096         xpt_unlock_buses();
2097
2098         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
2099 }
2100
2101 static int
2102 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2103 {
2104         struct ccb_dev_match *cdm;
2105         dev_match_ret retval;
2106
2107         cdm = (struct ccb_dev_match *)arg;
2108
2109         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2110
2111         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2112                 cdm->status = CAM_DEV_MATCH_ERROR;
2113                 return(0);
2114         }
2115
2116         /*
2117          * If the copy flag is set, copy this peripheral out.
2118          */
2119         if (retval & DM_RET_COPY) {
2120                 int spaceleft, j;
2121                 size_t l;
2122
2123                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2124                         sizeof(struct dev_match_result));
2125
2126                 /*
2127                  * If we don't have enough space to put in another
2128                  * match result, save our position and tell the
2129                  * user there are more devices to check.
2130                  */
2131                 if (spaceleft < sizeof(struct dev_match_result)) {
2132                         struct periph_driver **pdrv;
2133
2134                         pdrv = NULL;
2135                         bzero(&cdm->pos, sizeof(cdm->pos));
2136                         cdm->pos.position_type =
2137                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2138                                 CAM_DEV_POS_PERIPH;
2139
2140                         /*
2141                          * This may look a bit non-sensical, but it is
2142                          * actually quite logical.  There are very few
2143                          * peripheral drivers, and bloating every peripheral
2144                          * structure with a pointer back to its parent
2145                          * peripheral driver linker set entry would cost
2146                          * more in the long run than doing this quick lookup.
2147                          */
2148                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2149                                 if (strcmp((*pdrv)->driver_name,
2150                                     periph->periph_name) == 0)
2151                                         break;
2152                         }
2153
2154                         if (*pdrv == NULL) {
2155                                 cdm->status = CAM_DEV_MATCH_ERROR;
2156                                 return(0);
2157                         }
2158
2159                         cdm->pos.cookie.pdrv = pdrv;
2160                         /*
2161                          * The periph generation slot does double duty, as
2162                          * does the periph pointer slot.  They are used for
2163                          * both edt and pdrv lookups and positioning.
2164                          */
2165                         cdm->pos.cookie.periph = periph;
2166                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2167                                 (*pdrv)->generation;
2168                         cdm->status = CAM_DEV_MATCH_MORE;
2169                         return(0);
2170                 }
2171
2172                 j = cdm->num_matches;
2173                 cdm->num_matches++;
2174                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2175                 cdm->matches[j].result.periph_result.path_id =
2176                         periph->path->bus->path_id;
2177
2178                 /*
2179                  * The transport layer peripheral doesn't have a target or
2180                  * lun.
2181                  */
2182                 if (periph->path->target)
2183                         cdm->matches[j].result.periph_result.target_id =
2184                                 periph->path->target->target_id;
2185                 else
2186                         cdm->matches[j].result.periph_result.target_id =
2187                                 CAM_TARGET_WILDCARD;
2188
2189                 if (periph->path->device)
2190                         cdm->matches[j].result.periph_result.target_lun =
2191                                 periph->path->device->lun_id;
2192                 else
2193                         cdm->matches[j].result.periph_result.target_lun =
2194                                 CAM_LUN_WILDCARD;
2195
2196                 cdm->matches[j].result.periph_result.unit_number =
2197                         periph->unit_number;
2198                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2199                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2200                         periph->periph_name, l);
2201         }
2202
2203         return(1);
2204 }
2205
2206 static int
2207 xptperiphlistmatch(struct ccb_dev_match *cdm)
2208 {
2209         int ret;
2210
2211         cdm->num_matches = 0;
2212
2213         /*
2214          * At this point in the edt traversal function, we check the bus
2215          * list generation to make sure that no buses have been added or
2216          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2217          * For the peripheral driver list traversal function, however, we
2218          * don't have to worry about new peripheral driver types coming or
2219          * going; they're in a linker set, and therefore can't change
2220          * without a recompile.
2221          */
2222
2223         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2224          && (cdm->pos.cookie.pdrv != NULL))
2225                 ret = xptpdrvtraverse(
2226                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2227                                 xptplistpdrvfunc, cdm);
2228         else
2229                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2230
2231         /*
2232          * If we get back 0, that means that we had to stop before fully
2233          * traversing the peripheral driver tree.  It also means that one of
2234          * the subroutines has set the status field to the proper value.  If
2235          * we get back 1, we've fully traversed the EDT and copied out any
2236          * matching entries.
2237          */
2238         if (ret == 1)
2239                 cdm->status = CAM_DEV_MATCH_LAST;
2240
2241         return(ret);
2242 }
2243
2244 static int
2245 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2246 {
2247         struct cam_eb *bus, *next_bus;
2248         int retval;
2249
2250         retval = 1;
2251         if (start_bus)
2252                 bus = start_bus;
2253         else {
2254                 xpt_lock_buses();
2255                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2256                 if (bus == NULL) {
2257                         xpt_unlock_buses();
2258                         return (retval);
2259                 }
2260                 bus->refcount++;
2261                 xpt_unlock_buses();
2262         }
2263         for (; bus != NULL; bus = next_bus) {
2264                 retval = tr_func(bus, arg);
2265                 if (retval == 0) {
2266                         xpt_release_bus(bus);
2267                         break;
2268                 }
2269                 xpt_lock_buses();
2270                 next_bus = TAILQ_NEXT(bus, links);
2271                 if (next_bus)
2272                         next_bus->refcount++;
2273                 xpt_unlock_buses();
2274                 xpt_release_bus(bus);
2275         }
2276         return(retval);
2277 }
2278
2279 static int
2280 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2281                   xpt_targetfunc_t *tr_func, void *arg)
2282 {
2283         struct cam_et *target, *next_target;
2284         int retval;
2285
2286         retval = 1;
2287         if (start_target)
2288                 target = start_target;
2289         else {
2290                 mtx_lock(&bus->eb_mtx);
2291                 target = TAILQ_FIRST(&bus->et_entries);
2292                 if (target == NULL) {
2293                         mtx_unlock(&bus->eb_mtx);
2294                         return (retval);
2295                 }
2296                 target->refcount++;
2297                 mtx_unlock(&bus->eb_mtx);
2298         }
2299         for (; target != NULL; target = next_target) {
2300                 retval = tr_func(target, arg);
2301                 if (retval == 0) {
2302                         xpt_release_target(target);
2303                         break;
2304                 }
2305                 mtx_lock(&bus->eb_mtx);
2306                 next_target = TAILQ_NEXT(target, links);
2307                 if (next_target)
2308                         next_target->refcount++;
2309                 mtx_unlock(&bus->eb_mtx);
2310                 xpt_release_target(target);
2311         }
2312         return(retval);
2313 }
2314
2315 static int
2316 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2317                   xpt_devicefunc_t *tr_func, void *arg)
2318 {
2319         struct cam_eb *bus;
2320         struct cam_ed *device, *next_device;
2321         int retval;
2322
2323         retval = 1;
2324         bus = target->bus;
2325         if (start_device)
2326                 device = start_device;
2327         else {
2328                 mtx_lock(&bus->eb_mtx);
2329                 device = TAILQ_FIRST(&target->ed_entries);
2330                 if (device == NULL) {
2331                         mtx_unlock(&bus->eb_mtx);
2332                         return (retval);
2333                 }
2334                 device->refcount++;
2335                 mtx_unlock(&bus->eb_mtx);
2336         }
2337         for (; device != NULL; device = next_device) {
2338                 mtx_lock(&device->device_mtx);
2339                 retval = tr_func(device, arg);
2340                 mtx_unlock(&device->device_mtx);
2341                 if (retval == 0) {
2342                         xpt_release_device(device);
2343                         break;
2344                 }
2345                 mtx_lock(&bus->eb_mtx);
2346                 next_device = TAILQ_NEXT(device, links);
2347                 if (next_device)
2348                         next_device->refcount++;
2349                 mtx_unlock(&bus->eb_mtx);
2350                 xpt_release_device(device);
2351         }
2352         return(retval);
2353 }
2354
2355 static int
2356 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2357                   xpt_periphfunc_t *tr_func, void *arg)
2358 {
2359         struct cam_eb *bus;
2360         struct cam_periph *periph, *next_periph;
2361         int retval;
2362
2363         retval = 1;
2364
2365         bus = device->target->bus;
2366         if (start_periph)
2367                 periph = start_periph;
2368         else {
2369                 xpt_lock_buses();
2370                 mtx_lock(&bus->eb_mtx);
2371                 periph = SLIST_FIRST(&device->periphs);
2372                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2373                         periph = SLIST_NEXT(periph, periph_links);
2374                 if (periph == NULL) {
2375                         mtx_unlock(&bus->eb_mtx);
2376                         xpt_unlock_buses();
2377                         return (retval);
2378                 }
2379                 periph->refcount++;
2380                 mtx_unlock(&bus->eb_mtx);
2381                 xpt_unlock_buses();
2382         }
2383         for (; periph != NULL; periph = next_periph) {
2384                 retval = tr_func(periph, arg);
2385                 if (retval == 0) {
2386                         cam_periph_release_locked(periph);
2387                         break;
2388                 }
2389                 xpt_lock_buses();
2390                 mtx_lock(&bus->eb_mtx);
2391                 next_periph = SLIST_NEXT(periph, periph_links);
2392                 while (next_periph != NULL &&
2393                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2394                         next_periph = SLIST_NEXT(next_periph, periph_links);
2395                 if (next_periph)
2396                         next_periph->refcount++;
2397                 mtx_unlock(&bus->eb_mtx);
2398                 xpt_unlock_buses();
2399                 cam_periph_release_locked(periph);
2400         }
2401         return(retval);
2402 }
2403
2404 static int
2405 xptpdrvtraverse(struct periph_driver **start_pdrv,
2406                 xpt_pdrvfunc_t *tr_func, void *arg)
2407 {
2408         struct periph_driver **pdrv;
2409         int retval;
2410
2411         retval = 1;
2412
2413         /*
2414          * We don't traverse the peripheral driver list like we do the
2415          * other lists, because it is a linker set, and therefore cannot be
2416          * changed during runtime.  If the peripheral driver list is ever
2417          * re-done to be something other than a linker set (i.e. it can
2418          * change while the system is running), the list traversal should
2419          * be modified to work like the other traversal functions.
2420          */
2421         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2422              *pdrv != NULL; pdrv++) {
2423                 retval = tr_func(pdrv, arg);
2424
2425                 if (retval == 0)
2426                         return(retval);
2427         }
2428
2429         return(retval);
2430 }
2431
2432 static int
2433 xptpdperiphtraverse(struct periph_driver **pdrv,
2434                     struct cam_periph *start_periph,
2435                     xpt_periphfunc_t *tr_func, void *arg)
2436 {
2437         struct cam_periph *periph, *next_periph;
2438         int retval;
2439
2440         retval = 1;
2441
2442         if (start_periph)
2443                 periph = start_periph;
2444         else {
2445                 xpt_lock_buses();
2446                 periph = TAILQ_FIRST(&(*pdrv)->units);
2447                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2448                         periph = TAILQ_NEXT(periph, unit_links);
2449                 if (periph == NULL) {
2450                         xpt_unlock_buses();
2451                         return (retval);
2452                 }
2453                 periph->refcount++;
2454                 xpt_unlock_buses();
2455         }
2456         for (; periph != NULL; periph = next_periph) {
2457                 cam_periph_lock(periph);
2458                 retval = tr_func(periph, arg);
2459                 cam_periph_unlock(periph);
2460                 if (retval == 0) {
2461                         cam_periph_release(periph);
2462                         break;
2463                 }
2464                 xpt_lock_buses();
2465                 next_periph = TAILQ_NEXT(periph, unit_links);
2466                 while (next_periph != NULL &&
2467                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2468                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2469                 if (next_periph)
2470                         next_periph->refcount++;
2471                 xpt_unlock_buses();
2472                 cam_periph_release(periph);
2473         }
2474         return(retval);
2475 }
2476
2477 static int
2478 xptdefbusfunc(struct cam_eb *bus, void *arg)
2479 {
2480         struct xpt_traverse_config *tr_config;
2481
2482         tr_config = (struct xpt_traverse_config *)arg;
2483
2484         if (tr_config->depth == XPT_DEPTH_BUS) {
2485                 xpt_busfunc_t *tr_func;
2486
2487                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2488
2489                 return(tr_func(bus, tr_config->tr_arg));
2490         } else
2491                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2492 }
2493
2494 static int
2495 xptdeftargetfunc(struct cam_et *target, void *arg)
2496 {
2497         struct xpt_traverse_config *tr_config;
2498
2499         tr_config = (struct xpt_traverse_config *)arg;
2500
2501         if (tr_config->depth == XPT_DEPTH_TARGET) {
2502                 xpt_targetfunc_t *tr_func;
2503
2504                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2505
2506                 return(tr_func(target, tr_config->tr_arg));
2507         } else
2508                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2509 }
2510
2511 static int
2512 xptdefdevicefunc(struct cam_ed *device, void *arg)
2513 {
2514         struct xpt_traverse_config *tr_config;
2515
2516         tr_config = (struct xpt_traverse_config *)arg;
2517
2518         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2519                 xpt_devicefunc_t *tr_func;
2520
2521                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2522
2523                 return(tr_func(device, tr_config->tr_arg));
2524         } else
2525                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2526 }
2527
2528 static int
2529 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2530 {
2531         struct xpt_traverse_config *tr_config;
2532         xpt_periphfunc_t *tr_func;
2533
2534         tr_config = (struct xpt_traverse_config *)arg;
2535
2536         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2537
2538         /*
2539          * Unlike the other default functions, we don't check for depth
2540          * here.  The peripheral driver level is the last level in the EDT,
2541          * so if we're here, we should execute the function in question.
2542          */
2543         return(tr_func(periph, tr_config->tr_arg));
2544 }
2545
2546 /*
2547  * Execute the given function for every bus in the EDT.
2548  */
2549 static int
2550 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2551 {
2552         struct xpt_traverse_config tr_config;
2553
2554         tr_config.depth = XPT_DEPTH_BUS;
2555         tr_config.tr_func = tr_func;
2556         tr_config.tr_arg = arg;
2557
2558         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2559 }
2560
2561 /*
2562  * Execute the given function for every device in the EDT.
2563  */
2564 static int
2565 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2566 {
2567         struct xpt_traverse_config tr_config;
2568
2569         tr_config.depth = XPT_DEPTH_DEVICE;
2570         tr_config.tr_func = tr_func;
2571         tr_config.tr_arg = arg;
2572
2573         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2574 }
2575
2576 static int
2577 xptsetasyncfunc(struct cam_ed *device, void *arg)
2578 {
2579         struct cam_path path;
2580         struct ccb_getdev cgd;
2581         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2582
2583         /*
2584          * Don't report unconfigured devices (Wildcard devs,
2585          * devices only for target mode, device instances
2586          * that have been invalidated but are waiting for
2587          * their last reference count to be released).
2588          */
2589         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2590                 return (1);
2591
2592         xpt_compile_path(&path,
2593                          NULL,
2594                          device->target->bus->path_id,
2595                          device->target->target_id,
2596                          device->lun_id);
2597         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2598         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2599         xpt_action((union ccb *)&cgd);
2600         csa->callback(csa->callback_arg,
2601                             AC_FOUND_DEVICE,
2602                             &path, &cgd);
2603         xpt_release_path(&path);
2604
2605         return(1);
2606 }
2607
2608 static int
2609 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2610 {
2611         struct cam_path path;
2612         struct ccb_pathinq cpi;
2613         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2614
2615         xpt_compile_path(&path, /*periph*/NULL,
2616                          bus->path_id,
2617                          CAM_TARGET_WILDCARD,
2618                          CAM_LUN_WILDCARD);
2619         xpt_path_lock(&path);
2620         xpt_path_inq(&cpi, &path);
2621         csa->callback(csa->callback_arg,
2622                             AC_PATH_REGISTERED,
2623                             &path, &cpi);
2624         xpt_path_unlock(&path);
2625         xpt_release_path(&path);
2626
2627         return(1);
2628 }
2629
2630 void
2631 xpt_action(union ccb *start_ccb)
2632 {
2633
2634         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2635             ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2636                 xpt_action_name(start_ccb->ccb_h.func_code)));
2637
2638         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2639         (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb);
2640 }
2641
2642 void
2643 xpt_action_default(union ccb *start_ccb)
2644 {
2645         struct cam_path *path;
2646         struct cam_sim *sim;
2647         struct mtx *mtx;
2648
2649         path = start_ccb->ccb_h.path;
2650         CAM_DEBUG(path, CAM_DEBUG_TRACE,
2651             ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2652                 xpt_action_name(start_ccb->ccb_h.func_code)));
2653
2654         switch (start_ccb->ccb_h.func_code) {
2655         case XPT_SCSI_IO:
2656         {
2657                 struct cam_ed *device;
2658
2659                 /*
2660                  * For the sake of compatibility with SCSI-1
2661                  * devices that may not understand the identify
2662                  * message, we include lun information in the
2663                  * second byte of all commands.  SCSI-1 specifies
2664                  * that luns are a 3 bit value and reserves only 3
2665                  * bits for lun information in the CDB.  Later
2666                  * revisions of the SCSI spec allow for more than 8
2667                  * luns, but have deprecated lun information in the
2668                  * CDB.  So, if the lun won't fit, we must omit.
2669                  *
2670                  * Also be aware that during initial probing for devices,
2671                  * the inquiry information is unknown but initialized to 0.
2672                  * This means that this code will be exercised while probing
2673                  * devices with an ANSI revision greater than 2.
2674                  */
2675                 device = path->device;
2676                 if (device->protocol_version <= SCSI_REV_2
2677                  && start_ccb->ccb_h.target_lun < 8
2678                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2679
2680                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2681                             start_ccb->ccb_h.target_lun << 5;
2682                 }
2683                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2684         }
2685         /* FALLTHROUGH */
2686         case XPT_TARGET_IO:
2687         case XPT_CONT_TARGET_IO:
2688                 start_ccb->csio.sense_resid = 0;
2689                 start_ccb->csio.resid = 0;
2690                 /* FALLTHROUGH */
2691         case XPT_ATA_IO:
2692                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2693                         start_ccb->ataio.resid = 0;
2694                 /* FALLTHROUGH */
2695         case XPT_NVME_IO:
2696                 /* FALLTHROUGH */
2697         case XPT_NVME_ADMIN:
2698                 /* FALLTHROUGH */
2699         case XPT_MMC_IO:
2700                 /* XXX just like nmve_io? */
2701         case XPT_RESET_DEV:
2702         case XPT_ENG_EXEC:
2703         case XPT_SMP_IO:
2704         {
2705                 struct cam_devq *devq;
2706
2707                 devq = path->bus->sim->devq;
2708                 mtx_lock(&devq->send_mtx);
2709                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2710                 if (xpt_schedule_devq(devq, path->device) != 0)
2711                         xpt_run_devq(devq);
2712                 mtx_unlock(&devq->send_mtx);
2713                 break;
2714         }
2715         case XPT_CALC_GEOMETRY:
2716                 /* Filter out garbage */
2717                 if (start_ccb->ccg.block_size == 0
2718                  || start_ccb->ccg.volume_size == 0) {
2719                         start_ccb->ccg.cylinders = 0;
2720                         start_ccb->ccg.heads = 0;
2721                         start_ccb->ccg.secs_per_track = 0;
2722                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2723                         break;
2724                 }
2725 #if defined(__sparc64__)
2726                 /*
2727                  * For sparc64, we may need adjust the geometry of large
2728                  * disks in order to fit the limitations of the 16-bit
2729                  * fields of the VTOC8 disk label.
2730                  */
2731                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2732                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2733                         break;
2734                 }
2735 #endif
2736                 goto call_sim;
2737         case XPT_ABORT:
2738         {
2739                 union ccb* abort_ccb;
2740
2741                 abort_ccb = start_ccb->cab.abort_ccb;
2742                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2743                         struct cam_ed *device;
2744                         struct cam_devq *devq;
2745
2746                         device = abort_ccb->ccb_h.path->device;
2747                         devq = device->sim->devq;
2748
2749                         mtx_lock(&devq->send_mtx);
2750                         if (abort_ccb->ccb_h.pinfo.index > 0) {
2751                                 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb);
2752                                 abort_ccb->ccb_h.status =
2753                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2754                                 xpt_freeze_devq_device(device, 1);
2755                                 mtx_unlock(&devq->send_mtx);
2756                                 xpt_done(abort_ccb);
2757                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2758                                 break;
2759                         }
2760                         mtx_unlock(&devq->send_mtx);
2761
2762                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2763                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2764                                 /*
2765                                  * We've caught this ccb en route to
2766                                  * the SIM.  Flag it for abort and the
2767                                  * SIM will do so just before starting
2768                                  * real work on the CCB.
2769                                  */
2770                                 abort_ccb->ccb_h.status =
2771                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2772                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2773                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2774                                 break;
2775                         }
2776                 }
2777                 if (XPT_FC_IS_QUEUED(abort_ccb)
2778                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2779                         /*
2780                          * It's already completed but waiting
2781                          * for our SWI to get to it.
2782                          */
2783                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2784                         break;
2785                 }
2786                 /*
2787                  * If we weren't able to take care of the abort request
2788                  * in the XPT, pass the request down to the SIM for processing.
2789                  */
2790         }
2791         /* FALLTHROUGH */
2792         case XPT_ACCEPT_TARGET_IO:
2793         case XPT_EN_LUN:
2794         case XPT_IMMED_NOTIFY:
2795         case XPT_NOTIFY_ACK:
2796         case XPT_RESET_BUS:
2797         case XPT_IMMEDIATE_NOTIFY:
2798         case XPT_NOTIFY_ACKNOWLEDGE:
2799         case XPT_GET_SIM_KNOB_OLD:
2800         case XPT_GET_SIM_KNOB:
2801         case XPT_SET_SIM_KNOB:
2802         case XPT_GET_TRAN_SETTINGS:
2803         case XPT_SET_TRAN_SETTINGS:
2804         case XPT_PATH_INQ:
2805 call_sim:
2806                 sim = path->bus->sim;
2807                 mtx = sim->mtx;
2808                 if (mtx && !mtx_owned(mtx))
2809                         mtx_lock(mtx);
2810                 else
2811                         mtx = NULL;
2812
2813                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2814                     ("Calling sim->sim_action(): func=%#x\n", start_ccb->ccb_h.func_code));
2815                 (*(sim->sim_action))(sim, start_ccb);
2816                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2817                     ("sim->sim_action returned: status=%#x\n", start_ccb->ccb_h.status));
2818                 if (mtx)
2819                         mtx_unlock(mtx);
2820                 break;
2821         case XPT_PATH_STATS:
2822                 start_ccb->cpis.last_reset = path->bus->last_reset;
2823                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2824                 break;
2825         case XPT_GDEV_TYPE:
2826         {
2827                 struct cam_ed *dev;
2828
2829                 dev = path->device;
2830                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2831                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2832                 } else {
2833                         struct ccb_getdev *cgd;
2834
2835                         cgd = &start_ccb->cgd;
2836                         cgd->protocol = dev->protocol;
2837                         cgd->inq_data = dev->inq_data;
2838                         cgd->ident_data = dev->ident_data;
2839                         cgd->inq_flags = dev->inq_flags;
2840                         cgd->ccb_h.status = CAM_REQ_CMP;
2841                         cgd->serial_num_len = dev->serial_num_len;
2842                         if ((dev->serial_num_len > 0)
2843                          && (dev->serial_num != NULL))
2844                                 bcopy(dev->serial_num, cgd->serial_num,
2845                                       dev->serial_num_len);
2846                 }
2847                 break;
2848         }
2849         case XPT_GDEV_STATS:
2850         {
2851                 struct ccb_getdevstats *cgds = &start_ccb->cgds;
2852                 struct cam_ed *dev = path->device;
2853                 struct cam_eb *bus = path->bus;
2854                 struct cam_et *tar = path->target;
2855                 struct cam_devq *devq = bus->sim->devq;
2856
2857                 mtx_lock(&devq->send_mtx);
2858                 cgds->dev_openings = dev->ccbq.dev_openings;
2859                 cgds->dev_active = dev->ccbq.dev_active;
2860                 cgds->allocated = dev->ccbq.allocated;
2861                 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2862                 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued;
2863                 cgds->last_reset = tar->last_reset;
2864                 cgds->maxtags = dev->maxtags;
2865                 cgds->mintags = dev->mintags;
2866                 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2867                         cgds->last_reset = bus->last_reset;
2868                 mtx_unlock(&devq->send_mtx);
2869                 cgds->ccb_h.status = CAM_REQ_CMP;
2870                 break;
2871         }
2872         case XPT_GDEVLIST:
2873         {
2874                 struct cam_periph       *nperiph;
2875                 struct periph_list      *periph_head;
2876                 struct ccb_getdevlist   *cgdl;
2877                 u_int                   i;
2878                 struct cam_ed           *device;
2879                 int                     found;
2880
2881
2882                 found = 0;
2883
2884                 /*
2885                  * Don't want anyone mucking with our data.
2886                  */
2887                 device = path->device;
2888                 periph_head = &device->periphs;
2889                 cgdl = &start_ccb->cgdl;
2890
2891                 /*
2892                  * Check and see if the list has changed since the user
2893                  * last requested a list member.  If so, tell them that the
2894                  * list has changed, and therefore they need to start over
2895                  * from the beginning.
2896                  */
2897                 if ((cgdl->index != 0) &&
2898                     (cgdl->generation != device->generation)) {
2899                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2900                         break;
2901                 }
2902
2903                 /*
2904                  * Traverse the list of peripherals and attempt to find
2905                  * the requested peripheral.
2906                  */
2907                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2908                      (nperiph != NULL) && (i <= cgdl->index);
2909                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2910                         if (i == cgdl->index) {
2911                                 strlcpy(cgdl->periph_name,
2912                                         nperiph->periph_name,
2913                                         sizeof(cgdl->periph_name));
2914                                 cgdl->unit_number = nperiph->unit_number;
2915                                 found = 1;
2916                         }
2917                 }
2918                 if (found == 0) {
2919                         cgdl->status = CAM_GDEVLIST_ERROR;
2920                         break;
2921                 }
2922
2923                 if (nperiph == NULL)
2924                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2925                 else
2926                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2927
2928                 cgdl->index++;
2929                 cgdl->generation = device->generation;
2930
2931                 cgdl->ccb_h.status = CAM_REQ_CMP;
2932                 break;
2933         }
2934         case XPT_DEV_MATCH:
2935         {
2936                 dev_pos_type position_type;
2937                 struct ccb_dev_match *cdm;
2938
2939                 cdm = &start_ccb->cdm;
2940
2941                 /*
2942                  * There are two ways of getting at information in the EDT.
2943                  * The first way is via the primary EDT tree.  It starts
2944                  * with a list of buses, then a list of targets on a bus,
2945                  * then devices/luns on a target, and then peripherals on a
2946                  * device/lun.  The "other" way is by the peripheral driver
2947                  * lists.  The peripheral driver lists are organized by
2948                  * peripheral driver.  (obviously)  So it makes sense to
2949                  * use the peripheral driver list if the user is looking
2950                  * for something like "da1", or all "da" devices.  If the
2951                  * user is looking for something on a particular bus/target
2952                  * or lun, it's generally better to go through the EDT tree.
2953                  */
2954
2955                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2956                         position_type = cdm->pos.position_type;
2957                 else {
2958                         u_int i;
2959
2960                         position_type = CAM_DEV_POS_NONE;
2961
2962                         for (i = 0; i < cdm->num_patterns; i++) {
2963                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2964                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2965                                         position_type = CAM_DEV_POS_EDT;
2966                                         break;
2967                                 }
2968                         }
2969
2970                         if (cdm->num_patterns == 0)
2971                                 position_type = CAM_DEV_POS_EDT;
2972                         else if (position_type == CAM_DEV_POS_NONE)
2973                                 position_type = CAM_DEV_POS_PDRV;
2974                 }
2975
2976                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2977                 case CAM_DEV_POS_EDT:
2978                         xptedtmatch(cdm);
2979                         break;
2980                 case CAM_DEV_POS_PDRV:
2981                         xptperiphlistmatch(cdm);
2982                         break;
2983                 default:
2984                         cdm->status = CAM_DEV_MATCH_ERROR;
2985                         break;
2986                 }
2987
2988                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2989                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2990                 else
2991                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2992
2993                 break;
2994         }
2995         case XPT_SASYNC_CB:
2996         {
2997                 struct ccb_setasync *csa;
2998                 struct async_node *cur_entry;
2999                 struct async_list *async_head;
3000                 u_int32_t added;
3001
3002                 csa = &start_ccb->csa;
3003                 added = csa->event_enable;
3004                 async_head = &path->device->asyncs;
3005
3006                 /*
3007                  * If there is already an entry for us, simply
3008                  * update it.
3009                  */
3010                 cur_entry = SLIST_FIRST(async_head);
3011                 while (cur_entry != NULL) {
3012                         if ((cur_entry->callback_arg == csa->callback_arg)
3013                          && (cur_entry->callback == csa->callback))
3014                                 break;
3015                         cur_entry = SLIST_NEXT(cur_entry, links);
3016                 }
3017
3018                 if (cur_entry != NULL) {
3019                         /*
3020                          * If the request has no flags set,
3021                          * remove the entry.
3022                          */
3023                         added &= ~cur_entry->event_enable;
3024                         if (csa->event_enable == 0) {
3025                                 SLIST_REMOVE(async_head, cur_entry,
3026                                              async_node, links);
3027                                 xpt_release_device(path->device);
3028                                 free(cur_entry, M_CAMXPT);
3029                         } else {
3030                                 cur_entry->event_enable = csa->event_enable;
3031                         }
3032                         csa->event_enable = added;
3033                 } else {
3034                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3035                                            M_NOWAIT);
3036                         if (cur_entry == NULL) {
3037                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3038                                 break;
3039                         }
3040                         cur_entry->event_enable = csa->event_enable;
3041                         cur_entry->event_lock = (path->bus->sim->mtx &&
3042                             mtx_owned(path->bus->sim->mtx)) ? 1 : 0;
3043                         cur_entry->callback_arg = csa->callback_arg;
3044                         cur_entry->callback = csa->callback;
3045                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3046                         xpt_acquire_device(path->device);
3047                 }
3048                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3049                 break;
3050         }
3051         case XPT_REL_SIMQ:
3052         {
3053                 struct ccb_relsim *crs;
3054                 struct cam_ed *dev;
3055
3056                 crs = &start_ccb->crs;
3057                 dev = path->device;
3058                 if (dev == NULL) {
3059
3060                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3061                         break;
3062                 }
3063
3064                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3065
3066                         /* Don't ever go below one opening */
3067                         if (crs->openings > 0) {
3068                                 xpt_dev_ccbq_resize(path, crs->openings);
3069                                 if (bootverbose) {
3070                                         xpt_print(path,
3071                                             "number of openings is now %d\n",
3072                                             crs->openings);
3073                                 }
3074                         }
3075                 }
3076
3077                 mtx_lock(&dev->sim->devq->send_mtx);
3078                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3079
3080                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3081
3082                                 /*
3083                                  * Just extend the old timeout and decrement
3084                                  * the freeze count so that a single timeout
3085                                  * is sufficient for releasing the queue.
3086                                  */
3087                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3088                                 callout_stop(&dev->callout);
3089                         } else {
3090
3091                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3092                         }
3093
3094                         callout_reset_sbt(&dev->callout,
3095                             SBT_1MS * crs->release_timeout, 0,
3096                             xpt_release_devq_timeout, dev, 0);
3097
3098                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3099
3100                 }
3101
3102                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3103
3104                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3105                                 /*
3106                                  * Decrement the freeze count so that a single
3107                                  * completion is still sufficient to unfreeze
3108                                  * the queue.
3109                                  */
3110                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3111                         } else {
3112
3113                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3114                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3115                         }
3116                 }
3117
3118                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3119
3120                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3121                          || (dev->ccbq.dev_active == 0)) {
3122
3123                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3124                         } else {
3125
3126                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3127                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3128                         }
3129                 }
3130                 mtx_unlock(&dev->sim->devq->send_mtx);
3131
3132                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3133                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3134                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3135                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3136                 break;
3137         }
3138         case XPT_DEBUG: {
3139                 struct cam_path *oldpath;
3140
3141                 /* Check that all request bits are supported. */
3142                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3143                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3144                         break;
3145                 }
3146
3147                 cam_dflags = CAM_DEBUG_NONE;
3148                 if (cam_dpath != NULL) {
3149                         oldpath = cam_dpath;
3150                         cam_dpath = NULL;
3151                         xpt_free_path(oldpath);
3152                 }
3153                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3154                         if (xpt_create_path(&cam_dpath, NULL,
3155                                             start_ccb->ccb_h.path_id,
3156                                             start_ccb->ccb_h.target_id,
3157                                             start_ccb->ccb_h.target_lun) !=
3158                                             CAM_REQ_CMP) {
3159                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3160                         } else {
3161                                 cam_dflags = start_ccb->cdbg.flags;
3162                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3163                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3164                                     cam_dflags);
3165                         }
3166                 } else
3167                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3168                 break;
3169         }
3170         case XPT_NOOP:
3171                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3172                         xpt_freeze_devq(path, 1);
3173                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3174                 break;
3175         case XPT_REPROBE_LUN:
3176                 xpt_async(AC_INQ_CHANGED, path, NULL);
3177                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3178                 xpt_done(start_ccb);
3179                 break;
3180         default:
3181         case XPT_SDEV_TYPE:
3182         case XPT_TERM_IO:
3183         case XPT_ENG_INQ:
3184                 /* XXX Implement */
3185                 xpt_print(start_ccb->ccb_h.path,
3186                     "%s: CCB type %#x %s not supported\n", __func__,
3187                     start_ccb->ccb_h.func_code,
3188                     xpt_action_name(start_ccb->ccb_h.func_code));
3189                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3190                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3191                         xpt_done(start_ccb);
3192                 }
3193                 break;
3194         }
3195         CAM_DEBUG(path, CAM_DEBUG_TRACE,
3196             ("xpt_action_default: func= %#x %s status %#x\n",
3197                 start_ccb->ccb_h.func_code,
3198                 xpt_action_name(start_ccb->ccb_h.func_code),
3199                 start_ccb->ccb_h.status));
3200 }
3201
3202 uint32_t
3203 xpt_poll_setup(union ccb *start_ccb)
3204 {
3205         u_int32_t timeout;
3206         struct    cam_sim *sim;
3207         struct    cam_devq *devq;
3208         struct    cam_ed *dev;
3209         struct mtx *mtx;
3210
3211         timeout = start_ccb->ccb_h.timeout * 10;
3212         sim = start_ccb->ccb_h.path->bus->sim;
3213         devq = sim->devq;
3214         mtx = sim->mtx;
3215         dev = start_ccb->ccb_h.path->device;
3216
3217         /*
3218          * Steal an opening so that no other queued requests
3219          * can get it before us while we simulate interrupts.
3220          */
3221         mtx_lock(&devq->send_mtx);
3222         dev->ccbq.dev_openings--;
3223         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3224             (--timeout > 0)) {
3225                 mtx_unlock(&devq->send_mtx);
3226                 DELAY(100);
3227                 if (mtx)
3228                         mtx_lock(mtx);
3229                 (*(sim->sim_poll))(sim);
3230                 if (mtx)
3231                         mtx_unlock(mtx);
3232                 camisr_runqueue();
3233                 mtx_lock(&devq->send_mtx);
3234         }
3235         dev->ccbq.dev_openings++;
3236         mtx_unlock(&devq->send_mtx);
3237
3238         return (timeout);
3239 }
3240
3241 void
3242 xpt_pollwait(union ccb *start_ccb, uint32_t timeout)
3243 {
3244         struct cam_sim  *sim;
3245         struct mtx      *mtx;
3246
3247         sim = start_ccb->ccb_h.path->bus->sim;
3248         mtx = sim->mtx;
3249
3250         while (--timeout > 0) {
3251                 if (mtx)
3252                         mtx_lock(mtx);
3253                 (*(sim->sim_poll))(sim);
3254                 if (mtx)
3255                         mtx_unlock(mtx);
3256                 camisr_runqueue();
3257                 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3258                     != CAM_REQ_INPROG)
3259                         break;
3260                 DELAY(100);
3261         }
3262
3263         if (timeout == 0) {
3264                 /*
3265                  * XXX Is it worth adding a sim_timeout entry
3266                  * point so we can attempt recovery?  If
3267                  * this is only used for dumps, I don't think
3268                  * it is.
3269                  */
3270                 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3271         }
3272 }
3273
3274 void
3275 xpt_polled_action(union ccb *start_ccb)
3276 {
3277         uint32_t        timeout;
3278         struct cam_ed   *dev;
3279
3280         timeout = start_ccb->ccb_h.timeout * 10;
3281         dev = start_ccb->ccb_h.path->device;
3282
3283         mtx_unlock(&dev->device_mtx);
3284
3285         timeout = xpt_poll_setup(start_ccb);
3286         if (timeout > 0) {
3287                 xpt_action(start_ccb);
3288                 xpt_pollwait(start_ccb, timeout);
3289         } else {
3290                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3291         }
3292
3293         mtx_lock(&dev->device_mtx);
3294 }
3295
3296 /*
3297  * Schedule a peripheral driver to receive a ccb when its
3298  * target device has space for more transactions.
3299  */
3300 void
3301 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3302 {
3303
3304         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3305         cam_periph_assert(periph, MA_OWNED);
3306         if (new_priority < periph->scheduled_priority) {
3307                 periph->scheduled_priority = new_priority;
3308                 xpt_run_allocq(periph, 0);
3309         }
3310 }
3311
3312
3313 /*
3314  * Schedule a device to run on a given queue.
3315  * If the device was inserted as a new entry on the queue,
3316  * return 1 meaning the device queue should be run. If we
3317  * were already queued, implying someone else has already
3318  * started the queue, return 0 so the caller doesn't attempt
3319  * to run the queue.
3320  */
3321 static int
3322 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3323                  u_int32_t new_priority)
3324 {
3325         int retval;
3326         u_int32_t old_priority;
3327
3328         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3329
3330
3331         old_priority = pinfo->priority;
3332
3333         /*
3334          * Are we already queued?
3335          */
3336         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3337                 /* Simply reorder based on new priority */
3338                 if (new_priority < old_priority) {
3339                         camq_change_priority(queue, pinfo->index,
3340                                              new_priority);
3341                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3342                                         ("changed priority to %d\n",
3343                                          new_priority));
3344                         retval = 1;
3345                 } else
3346                         retval = 0;
3347         } else {
3348                 /* New entry on the queue */
3349                 if (new_priority < old_priority)
3350                         pinfo->priority = new_priority;
3351
3352                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3353                                 ("Inserting onto queue\n"));
3354                 pinfo->generation = ++queue->generation;
3355                 camq_insert(queue, pinfo);
3356                 retval = 1;
3357         }
3358         return (retval);
3359 }
3360
3361 static void
3362 xpt_run_allocq_task(void *context, int pending)
3363 {
3364         struct cam_periph *periph = context;
3365
3366         cam_periph_lock(periph);
3367         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3368         xpt_run_allocq(periph, 1);
3369         cam_periph_unlock(periph);
3370         cam_periph_release(periph);
3371 }
3372
3373 static void
3374 xpt_run_allocq(struct cam_periph *periph, int sleep)
3375 {
3376         struct cam_ed   *device;
3377         union ccb       *ccb;
3378         uint32_t         prio;
3379
3380         cam_periph_assert(periph, MA_OWNED);
3381         if (periph->periph_allocating)
3382                 return;
3383         cam_periph_doacquire(periph);
3384         periph->periph_allocating = 1;
3385         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3386         device = periph->path->device;
3387         ccb = NULL;
3388 restart:
3389         while ((prio = min(periph->scheduled_priority,
3390             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3391             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3392              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3393
3394                 if (ccb == NULL &&
3395                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3396                         if (sleep) {
3397                                 ccb = xpt_get_ccb(periph);
3398                                 goto restart;
3399                         }
3400                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3401                                 break;
3402                         cam_periph_doacquire(periph);
3403                         periph->flags |= CAM_PERIPH_RUN_TASK;
3404                         taskqueue_enqueue(xsoftc.xpt_taskq,
3405                             &periph->periph_run_task);
3406                         break;
3407                 }
3408                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3409                 if (prio == periph->immediate_priority) {
3410                         periph->immediate_priority = CAM_PRIORITY_NONE;
3411                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3412                                         ("waking cam_periph_getccb()\n"));
3413                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3414                                           periph_links.sle);
3415                         wakeup(&periph->ccb_list);
3416                 } else {
3417                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3418                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3419                                         ("calling periph_start()\n"));
3420                         periph->periph_start(periph, ccb);
3421                 }
3422                 ccb = NULL;
3423         }
3424         if (ccb != NULL)
3425                 xpt_release_ccb(ccb);
3426         periph->periph_allocating = 0;
3427         cam_periph_release_locked(periph);
3428 }
3429
3430 static void
3431 xpt_run_devq(struct cam_devq *devq)
3432 {
3433         struct mtx *mtx;
3434
3435         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3436
3437         devq->send_queue.qfrozen_cnt++;
3438         while ((devq->send_queue.entries > 0)
3439             && (devq->send_openings > 0)
3440             && (devq->send_queue.qfrozen_cnt <= 1)) {
3441                 struct  cam_ed *device;
3442                 union ccb *work_ccb;
3443                 struct  cam_sim *sim;
3444                 struct xpt_proto *proto;
3445
3446                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3447                                                            CAMQ_HEAD);
3448                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3449                                 ("running device %p\n", device));
3450
3451                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3452                 if (work_ccb == NULL) {
3453                         printf("device on run queue with no ccbs???\n");
3454                         continue;
3455                 }
3456
3457                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3458
3459                         mtx_lock(&xsoftc.xpt_highpower_lock);
3460                         if (xsoftc.num_highpower <= 0) {
3461                                 /*
3462                                  * We got a high power command, but we
3463                                  * don't have any available slots.  Freeze
3464                                  * the device queue until we have a slot
3465                                  * available.
3466                                  */
3467                                 xpt_freeze_devq_device(device, 1);
3468                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3469                                                    highpowerq_entry);
3470
3471                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3472                                 continue;
3473                         } else {
3474                                 /*
3475                                  * Consume a high power slot while
3476                                  * this ccb runs.
3477                                  */
3478                                 xsoftc.num_highpower--;
3479                         }
3480                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3481                 }
3482                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3483                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3484                 devq->send_openings--;
3485                 devq->send_active++;
3486                 xpt_schedule_devq(devq, device);
3487                 mtx_unlock(&devq->send_mtx);
3488
3489                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3490                         /*
3491                          * The client wants to freeze the queue
3492                          * after this CCB is sent.
3493                          */
3494                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3495                 }
3496
3497                 /* In Target mode, the peripheral driver knows best... */
3498                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3499                         if ((device->inq_flags & SID_CmdQue) != 0
3500                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3501                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3502                         else
3503                                 /*
3504                                  * Clear this in case of a retried CCB that
3505                                  * failed due to a rejected tag.
3506                                  */
3507                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3508                 }
3509
3510                 KASSERT(device == work_ccb->ccb_h.path->device,
3511                     ("device (%p) / path->device (%p) mismatch",
3512                         device, work_ccb->ccb_h.path->device));
3513                 proto = xpt_proto_find(device->protocol);
3514                 if (proto && proto->ops->debug_out)
3515                         proto->ops->debug_out(work_ccb);
3516
3517                 /*
3518                  * Device queues can be shared among multiple SIM instances
3519                  * that reside on different buses.  Use the SIM from the
3520                  * queued device, rather than the one from the calling bus.
3521                  */
3522                 sim = device->sim;
3523                 mtx = sim->mtx;
3524                 if (mtx && !mtx_owned(mtx))
3525                         mtx_lock(mtx);
3526                 else
3527                         mtx = NULL;
3528                 work_ccb->ccb_h.qos.periph_data = cam_iosched_now();
3529                 (*(sim->sim_action))(sim, work_ccb);
3530                 if (mtx)
3531                         mtx_unlock(mtx);
3532                 mtx_lock(&devq->send_mtx);
3533         }
3534         devq->send_queue.qfrozen_cnt--;
3535 }
3536
3537 /*
3538  * This function merges stuff from the slave ccb into the master ccb, while
3539  * keeping important fields in the master ccb constant.
3540  */
3541 void
3542 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3543 {
3544
3545         /*
3546          * Pull fields that are valid for peripheral drivers to set
3547          * into the master CCB along with the CCB "payload".
3548          */
3549         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3550         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3551         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3552         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3553         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3554               sizeof(union ccb) - sizeof(struct ccb_hdr));
3555 }
3556
3557 void
3558 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3559                     u_int32_t priority, u_int32_t flags)
3560 {
3561
3562         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3563         ccb_h->pinfo.priority = priority;
3564         ccb_h->path = path;
3565         ccb_h->path_id = path->bus->path_id;
3566         if (path->target)
3567                 ccb_h->target_id = path->target->target_id;
3568         else
3569                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3570         if (path->device) {
3571                 ccb_h->target_lun = path->device->lun_id;
3572                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3573         } else {
3574                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3575         }
3576         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3577         ccb_h->flags = flags;
3578         ccb_h->xflags = 0;
3579 }
3580
3581 void
3582 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3583 {
3584         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3585 }
3586
3587 /* Path manipulation functions */
3588 cam_status
3589 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3590                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3591 {
3592         struct     cam_path *path;
3593         cam_status status;
3594
3595         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3596
3597         if (path == NULL) {
3598                 status = CAM_RESRC_UNAVAIL;
3599                 return(status);
3600         }
3601         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3602         if (status != CAM_REQ_CMP) {
3603                 free(path, M_CAMPATH);
3604                 path = NULL;
3605         }
3606         *new_path_ptr = path;
3607         return (status);
3608 }
3609
3610 cam_status
3611 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3612                          struct cam_periph *periph, path_id_t path_id,
3613                          target_id_t target_id, lun_id_t lun_id)
3614 {
3615
3616         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3617             lun_id));
3618 }
3619
3620 cam_status
3621 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3622                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3623 {
3624         struct       cam_eb *bus;
3625         struct       cam_et *target;
3626         struct       cam_ed *device;
3627         cam_status   status;
3628
3629         status = CAM_REQ_CMP;   /* Completed without error */
3630         target = NULL;          /* Wildcarded */
3631         device = NULL;          /* Wildcarded */
3632
3633         /*
3634          * We will potentially modify the EDT, so block interrupts
3635          * that may attempt to create cam paths.
3636          */
3637         bus = xpt_find_bus(path_id);
3638         if (bus == NULL) {
3639                 status = CAM_PATH_INVALID;
3640         } else {
3641                 xpt_lock_buses();
3642                 mtx_lock(&bus->eb_mtx);
3643                 target = xpt_find_target(bus, target_id);
3644                 if (target == NULL) {
3645                         /* Create one */
3646                         struct cam_et *new_target;
3647
3648                         new_target = xpt_alloc_target(bus, target_id);
3649                         if (new_target == NULL) {
3650                                 status = CAM_RESRC_UNAVAIL;
3651                         } else {
3652                                 target = new_target;
3653                         }
3654                 }
3655                 xpt_unlock_buses();
3656                 if (target != NULL) {
3657                         device = xpt_find_device(target, lun_id);
3658                         if (device == NULL) {
3659                                 /* Create one */
3660                                 struct cam_ed *new_device;
3661
3662                                 new_device =
3663                                     (*(bus->xport->ops->alloc_device))(bus,
3664                                                                        target,
3665                                                                        lun_id);
3666                                 if (new_device == NULL) {
3667                                         status = CAM_RESRC_UNAVAIL;
3668                                 } else {
3669                                         device = new_device;
3670                                 }
3671                         }
3672                 }
3673                 mtx_unlock(&bus->eb_mtx);
3674         }
3675
3676         /*
3677          * Only touch the user's data if we are successful.
3678          */
3679         if (status == CAM_REQ_CMP) {
3680                 new_path->periph = perph;
3681                 new_path->bus = bus;
3682                 new_path->target = target;
3683                 new_path->device = device;
3684                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3685         } else {
3686                 if (device != NULL)
3687                         xpt_release_device(device);
3688                 if (target != NULL)
3689                         xpt_release_target(target);
3690                 if (bus != NULL)
3691                         xpt_release_bus(bus);
3692         }
3693         return (status);
3694 }
3695
3696 cam_status
3697 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3698 {
3699         struct     cam_path *new_path;
3700
3701         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3702         if (new_path == NULL)
3703                 return(CAM_RESRC_UNAVAIL);
3704         xpt_copy_path(new_path, path);
3705         *new_path_ptr = new_path;
3706         return (CAM_REQ_CMP);
3707 }
3708
3709 void
3710 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3711 {
3712
3713         *new_path = *path;
3714         if (path->bus != NULL)
3715                 xpt_acquire_bus(path->bus);
3716         if (path->target != NULL)
3717                 xpt_acquire_target(path->target);
3718         if (path->device != NULL)
3719                 xpt_acquire_device(path->device);
3720 }
3721
3722 void
3723 xpt_release_path(struct cam_path *path)
3724 {
3725         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3726         if (path->device != NULL) {
3727                 xpt_release_device(path->device);
3728                 path->device = NULL;
3729         }
3730         if (path->target != NULL) {
3731                 xpt_release_target(path->target);
3732                 path->target = NULL;
3733         }
3734         if (path->bus != NULL) {
3735                 xpt_release_bus(path->bus);
3736                 path->bus = NULL;
3737         }
3738 }
3739
3740 void
3741 xpt_free_path(struct cam_path *path)
3742 {
3743
3744         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3745         xpt_release_path(path);
3746         free(path, M_CAMPATH);
3747 }
3748
3749 void
3750 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3751     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3752 {
3753
3754         xpt_lock_buses();
3755         if (bus_ref) {
3756                 if (path->bus)
3757                         *bus_ref = path->bus->refcount;
3758                 else
3759                         *bus_ref = 0;
3760         }
3761         if (periph_ref) {
3762                 if (path->periph)
3763                         *periph_ref = path->periph->refcount;
3764                 else
3765                         *periph_ref = 0;
3766         }
3767         xpt_unlock_buses();
3768         if (target_ref) {
3769                 if (path->target)
3770                         *target_ref = path->target->refcount;
3771                 else
3772                         *target_ref = 0;
3773         }
3774         if (device_ref) {
3775                 if (path->device)
3776                         *device_ref = path->device->refcount;
3777                 else
3778                         *device_ref = 0;
3779         }
3780 }
3781
3782 /*
3783  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3784  * in path1, 2 for match with wildcards in path2.
3785  */
3786 int
3787 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3788 {
3789         int retval = 0;
3790
3791         if (path1->bus != path2->bus) {
3792                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3793                         retval = 1;
3794                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3795                         retval = 2;
3796                 else
3797                         return (-1);
3798         }
3799         if (path1->target != path2->target) {
3800                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3801                         if (retval == 0)
3802                                 retval = 1;
3803                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3804                         retval = 2;
3805                 else
3806                         return (-1);
3807         }
3808         if (path1->device != path2->device) {
3809                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3810                         if (retval == 0)
3811                                 retval = 1;
3812                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3813                         retval = 2;
3814                 else
3815                         return (-1);
3816         }
3817         return (retval);
3818 }
3819
3820 int
3821 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3822 {
3823         int retval = 0;
3824
3825         if (path->bus != dev->target->bus) {
3826                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3827                         retval = 1;
3828                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3829                         retval = 2;
3830                 else
3831                         return (-1);
3832         }
3833         if (path->target != dev->target) {
3834                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3835                         if (retval == 0)
3836                                 retval = 1;
3837                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3838                         retval = 2;
3839                 else
3840                         return (-1);
3841         }
3842         if (path->device != dev) {
3843                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3844                         if (retval == 0)
3845                                 retval = 1;
3846                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3847                         retval = 2;
3848                 else
3849                         return (-1);
3850         }
3851         return (retval);
3852 }
3853
3854 void
3855 xpt_print_path(struct cam_path *path)
3856 {
3857         struct sbuf sb;
3858         char buffer[XPT_PRINT_LEN];
3859
3860         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3861         xpt_path_sbuf(path, &sb);
3862         sbuf_finish(&sb);
3863         printf("%s", sbuf_data(&sb));
3864         sbuf_delete(&sb);
3865 }
3866
3867 void
3868 xpt_print_device(struct cam_ed *device)
3869 {
3870
3871         if (device == NULL)
3872                 printf("(nopath): ");
3873         else {
3874                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3875                        device->sim->unit_number,
3876                        device->sim->bus_id,
3877                        device->target->target_id,
3878                        (uintmax_t)device->lun_id);
3879         }
3880 }
3881
3882 void
3883 xpt_print(struct cam_path *path, const char *fmt, ...)
3884 {
3885         va_list ap;
3886         struct sbuf sb;
3887         char buffer[XPT_PRINT_LEN];
3888
3889         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3890
3891         xpt_path_sbuf(path, &sb);
3892         va_start(ap, fmt);
3893         sbuf_vprintf(&sb, fmt, ap);
3894         va_end(ap);
3895
3896         sbuf_finish(&sb);
3897         printf("%s", sbuf_data(&sb));
3898         sbuf_delete(&sb);
3899 }
3900
3901 int
3902 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3903 {
3904         struct sbuf sb;
3905         int len;
3906
3907         sbuf_new(&sb, str, str_len, 0);
3908         len = xpt_path_sbuf(path, &sb);
3909         sbuf_finish(&sb);
3910         return (len);
3911 }
3912
3913 int
3914 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb)
3915 {
3916
3917         if (path == NULL)
3918                 sbuf_printf(sb, "(nopath): ");
3919         else {
3920                 if (path->periph != NULL)
3921                         sbuf_printf(sb, "(%s%d:", path->periph->periph_name,
3922                                     path->periph->unit_number);
3923                 else
3924                         sbuf_printf(sb, "(noperiph:");
3925
3926                 if (path->bus != NULL)
3927                         sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name,
3928                                     path->bus->sim->unit_number,
3929                                     path->bus->sim->bus_id);
3930                 else
3931                         sbuf_printf(sb, "nobus:");
3932
3933                 if (path->target != NULL)
3934                         sbuf_printf(sb, "%d:", path->target->target_id);
3935                 else
3936                         sbuf_printf(sb, "X:");
3937
3938                 if (path->device != NULL)
3939                         sbuf_printf(sb, "%jx): ",
3940                             (uintmax_t)path->device->lun_id);
3941                 else
3942                         sbuf_printf(sb, "X): ");
3943         }
3944
3945         return(sbuf_len(sb));
3946 }
3947
3948 path_id_t
3949 xpt_path_path_id(struct cam_path *path)
3950 {
3951         return(path->bus->path_id);
3952 }
3953
3954 target_id_t
3955 xpt_path_target_id(struct cam_path *path)
3956 {
3957         if (path->target != NULL)
3958                 return (path->target->target_id);
3959         else
3960                 return (CAM_TARGET_WILDCARD);
3961 }
3962
3963 lun_id_t
3964 xpt_path_lun_id(struct cam_path *path)
3965 {
3966         if (path->device != NULL)
3967                 return (path->device->lun_id);
3968         else
3969                 return (CAM_LUN_WILDCARD);
3970 }
3971
3972 struct cam_sim *
3973 xpt_path_sim(struct cam_path *path)
3974 {
3975
3976         return (path->bus->sim);
3977 }
3978
3979 struct cam_periph*
3980 xpt_path_periph(struct cam_path *path)
3981 {
3982
3983         return (path->periph);
3984 }
3985
3986 /*
3987  * Release a CAM control block for the caller.  Remit the cost of the structure
3988  * to the device referenced by the path.  If the this device had no 'credits'
3989  * and peripheral drivers have registered async callbacks for this notification
3990  * call them now.
3991  */
3992 void
3993 xpt_release_ccb(union ccb *free_ccb)
3994 {
3995         struct   cam_ed *device;
3996         struct   cam_periph *periph;
3997
3998         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3999         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
4000         device = free_ccb->ccb_h.path->device;
4001         periph = free_ccb->ccb_h.path->periph;
4002
4003         xpt_free_ccb(free_ccb);
4004         periph->periph_allocated--;
4005         cam_ccbq_release_opening(&device->ccbq);
4006         xpt_run_allocq(periph, 0);
4007 }
4008
4009 /* Functions accessed by SIM drivers */
4010
4011 static struct xpt_xport_ops xport_default_ops = {
4012         .alloc_device = xpt_alloc_device_default,
4013         .action = xpt_action_default,
4014         .async = xpt_dev_async_default,
4015 };
4016 static struct xpt_xport xport_default = {
4017         .xport = XPORT_UNKNOWN,
4018         .name = "unknown",
4019         .ops = &xport_default_ops,
4020 };
4021
4022 CAM_XPT_XPORT(xport_default);
4023
4024 /*
4025  * A sim structure, listing the SIM entry points and instance
4026  * identification info is passed to xpt_bus_register to hook the SIM
4027  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
4028  * for this new bus and places it in the array of buses and assigns
4029  * it a path_id.  The path_id may be influenced by "hard wiring"
4030  * information specified by the user.  Once interrupt services are
4031  * available, the bus will be probed.
4032  */
4033 int32_t
4034 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
4035 {
4036         struct cam_eb *new_bus;
4037         struct cam_eb *old_bus;
4038         struct ccb_pathinq cpi;
4039         struct cam_path *path;
4040         cam_status status;
4041
4042         sim->bus_id = bus;
4043         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4044                                           M_CAMXPT, M_NOWAIT|M_ZERO);
4045         if (new_bus == NULL) {
4046                 /* Couldn't satisfy request */
4047                 return (CAM_RESRC_UNAVAIL);
4048         }
4049
4050         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
4051         TAILQ_INIT(&new_bus->et_entries);
4052         cam_sim_hold(sim);
4053         new_bus->sim = sim;
4054         timevalclear(&new_bus->last_reset);
4055         new_bus->flags = 0;
4056         new_bus->refcount = 1;  /* Held until a bus_deregister event */
4057         new_bus->generation = 0;
4058
4059         xpt_lock_buses();
4060         sim->path_id = new_bus->path_id =
4061             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4062         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4063         while (old_bus != NULL
4064             && old_bus->path_id < new_bus->path_id)
4065                 old_bus = TAILQ_NEXT(old_bus, links);
4066         if (old_bus != NULL)
4067                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4068         else
4069                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
4070         xsoftc.bus_generation++;
4071         xpt_unlock_buses();
4072
4073         /*
4074          * Set a default transport so that a PATH_INQ can be issued to
4075          * the SIM.  This will then allow for probing and attaching of
4076          * a more appropriate transport.
4077          */
4078         new_bus->xport = &xport_default;
4079
4080         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
4081                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4082         if (status != CAM_REQ_CMP) {
4083                 xpt_release_bus(new_bus);
4084                 return (CAM_RESRC_UNAVAIL);
4085         }
4086
4087         xpt_path_inq(&cpi, path);
4088
4089         if (cpi.ccb_h.status == CAM_REQ_CMP) {
4090                 struct xpt_xport **xpt;
4091
4092                 SET_FOREACH(xpt, cam_xpt_xport_set) {
4093                         if ((*xpt)->xport == cpi.transport) {
4094                                 new_bus->xport = *xpt;
4095                                 break;
4096                         }
4097                 }
4098                 if (new_bus->xport == NULL) {
4099                         xpt_print(path,
4100                             "No transport found for %d\n", cpi.transport);
4101                         xpt_release_bus(new_bus);
4102                         free(path, M_CAMXPT);
4103                         return (CAM_RESRC_UNAVAIL);
4104                 }
4105         }
4106
4107         /* Notify interested parties */
4108         if (sim->path_id != CAM_XPT_PATH_ID) {
4109
4110                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
4111                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
4112                         union   ccb *scan_ccb;
4113
4114                         /* Initiate bus rescan. */
4115                         scan_ccb = xpt_alloc_ccb_nowait();
4116                         if (scan_ccb != NULL) {
4117                                 scan_ccb->ccb_h.path = path;
4118                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
4119                                 scan_ccb->crcn.flags = 0;
4120                                 xpt_rescan(scan_ccb);
4121                         } else {
4122                                 xpt_print(path,
4123                                           "Can't allocate CCB to scan bus\n");
4124                                 xpt_free_path(path);
4125                         }
4126                 } else
4127                         xpt_free_path(path);
4128         } else
4129                 xpt_free_path(path);
4130         return (CAM_SUCCESS);
4131 }
4132
4133 int32_t
4134 xpt_bus_deregister(path_id_t pathid)
4135 {
4136         struct cam_path bus_path;
4137         cam_status status;
4138
4139         status = xpt_compile_path(&bus_path, NULL, pathid,
4140                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4141         if (status != CAM_REQ_CMP)
4142                 return (status);
4143
4144         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4145         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4146
4147         /* Release the reference count held while registered. */
4148         xpt_release_bus(bus_path.bus);
4149         xpt_release_path(&bus_path);
4150
4151         return (CAM_REQ_CMP);
4152 }
4153
4154 static path_id_t
4155 xptnextfreepathid(void)
4156 {
4157         struct cam_eb *bus;
4158         path_id_t pathid;
4159         const char *strval;
4160
4161         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4162         pathid = 0;
4163         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4164 retry:
4165         /* Find an unoccupied pathid */
4166         while (bus != NULL && bus->path_id <= pathid) {
4167                 if (bus->path_id == pathid)
4168                         pathid++;
4169                 bus = TAILQ_NEXT(bus, links);
4170         }
4171
4172         /*
4173          * Ensure that this pathid is not reserved for
4174          * a bus that may be registered in the future.
4175          */
4176         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4177                 ++pathid;
4178                 /* Start the search over */
4179                 goto retry;
4180         }
4181         return (pathid);
4182 }
4183
4184 static path_id_t
4185 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4186 {
4187         path_id_t pathid;
4188         int i, dunit, val;
4189         char buf[32];
4190         const char *dname;
4191
4192         pathid = CAM_XPT_PATH_ID;
4193         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4194         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4195                 return (pathid);
4196         i = 0;
4197         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4198                 if (strcmp(dname, "scbus")) {
4199                         /* Avoid a bit of foot shooting. */
4200                         continue;
4201                 }
4202                 if (dunit < 0)          /* unwired?! */
4203                         continue;
4204                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4205                         if (sim_bus == val) {
4206                                 pathid = dunit;
4207                                 break;
4208                         }
4209                 } else if (sim_bus == 0) {
4210                         /* Unspecified matches bus 0 */
4211                         pathid = dunit;
4212                         break;
4213                 } else {
4214                         printf("Ambiguous scbus configuration for %s%d "
4215                                "bus %d, cannot wire down.  The kernel "
4216                                "config entry for scbus%d should "
4217                                "specify a controller bus.\n"
4218                                "Scbus will be assigned dynamically.\n",
4219                                sim_name, sim_unit, sim_bus, dunit);
4220                         break;
4221                 }
4222         }
4223
4224         if (pathid == CAM_XPT_PATH_ID)
4225                 pathid = xptnextfreepathid();
4226         return (pathid);
4227 }
4228
4229 static const char *
4230 xpt_async_string(u_int32_t async_code)
4231 {
4232
4233         switch (async_code) {
4234         case AC_BUS_RESET: return ("AC_BUS_RESET");
4235         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4236         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4237         case AC_SENT_BDR: return ("AC_SENT_BDR");
4238         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4239         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4240         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4241         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4242         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4243         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4244         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4245         case AC_CONTRACT: return ("AC_CONTRACT");
4246         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4247         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4248         }
4249         return ("AC_UNKNOWN");
4250 }
4251
4252 static int
4253 xpt_async_size(u_int32_t async_code)
4254 {
4255
4256         switch (async_code) {
4257         case AC_BUS_RESET: return (0);
4258         case AC_UNSOL_RESEL: return (0);
4259         case AC_SCSI_AEN: return (0);
4260         case AC_SENT_BDR: return (0);
4261         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4262         case AC_PATH_DEREGISTERED: return (0);
4263         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4264         case AC_LOST_DEVICE: return (0);
4265         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4266         case AC_INQ_CHANGED: return (0);
4267         case AC_GETDEV_CHANGED: return (0);
4268         case AC_CONTRACT: return (sizeof(struct ac_contract));
4269         case AC_ADVINFO_CHANGED: return (-1);
4270         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4271         }
4272         return (0);
4273 }
4274
4275 static int
4276 xpt_async_process_dev(struct cam_ed *device, void *arg)
4277 {
4278         union ccb *ccb = arg;
4279         struct cam_path *path = ccb->ccb_h.path;
4280         void *async_arg = ccb->casync.async_arg_ptr;
4281         u_int32_t async_code = ccb->casync.async_code;
4282         int relock;
4283
4284         if (path->device != device
4285          && path->device->lun_id != CAM_LUN_WILDCARD
4286          && device->lun_id != CAM_LUN_WILDCARD)
4287                 return (1);
4288
4289         /*
4290          * The async callback could free the device.
4291          * If it is a broadcast async, it doesn't hold
4292          * device reference, so take our own reference.
4293          */
4294         xpt_acquire_device(device);
4295
4296         /*
4297          * If async for specific device is to be delivered to
4298          * the wildcard client, take the specific device lock.
4299          * XXX: We may need a way for client to specify it.
4300          */
4301         if ((device->lun_id == CAM_LUN_WILDCARD &&
4302              path->device->lun_id != CAM_LUN_WILDCARD) ||
4303             (device->target->target_id == CAM_TARGET_WILDCARD &&
4304              path->target->target_id != CAM_TARGET_WILDCARD) ||
4305             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4306              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4307                 mtx_unlock(&device->device_mtx);
4308                 xpt_path_lock(path);
4309                 relock = 1;
4310         } else
4311                 relock = 0;
4312
4313         (*(device->target->bus->xport->ops->async))(async_code,
4314             device->target->bus, device->target, device, async_arg);
4315         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4316
4317         if (relock) {
4318                 xpt_path_unlock(path);
4319                 mtx_lock(&device->device_mtx);
4320         }
4321         xpt_release_device(device);
4322         return (1);
4323 }
4324
4325 static int
4326 xpt_async_process_tgt(struct cam_et *target, void *arg)
4327 {
4328         union ccb *ccb = arg;
4329         struct cam_path *path = ccb->ccb_h.path;
4330
4331         if (path->target != target
4332          && path->target->target_id != CAM_TARGET_WILDCARD
4333          && target->target_id != CAM_TARGET_WILDCARD)
4334                 return (1);
4335
4336         if (ccb->casync.async_code == AC_SENT_BDR) {
4337                 /* Update our notion of when the last reset occurred */
4338                 microtime(&target->last_reset);
4339         }
4340
4341         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4342 }
4343
4344 static void
4345 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4346 {
4347         struct cam_eb *bus;
4348         struct cam_path *path;
4349         void *async_arg;
4350         u_int32_t async_code;
4351
4352         path = ccb->ccb_h.path;
4353         async_code = ccb->casync.async_code;
4354         async_arg = ccb->casync.async_arg_ptr;
4355         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4356             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4357         bus = path->bus;
4358
4359         if (async_code == AC_BUS_RESET) {
4360                 /* Update our notion of when the last reset occurred */
4361                 microtime(&bus->last_reset);
4362         }
4363
4364         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4365
4366         /*
4367          * If this wasn't a fully wildcarded async, tell all
4368          * clients that want all async events.
4369          */
4370         if (bus != xpt_periph->path->bus) {
4371                 xpt_path_lock(xpt_periph->path);
4372                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4373                 xpt_path_unlock(xpt_periph->path);
4374         }
4375
4376         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4377                 xpt_release_devq(path, 1, TRUE);
4378         else
4379                 xpt_release_simq(path->bus->sim, TRUE);
4380         if (ccb->casync.async_arg_size > 0)
4381                 free(async_arg, M_CAMXPT);
4382         xpt_free_path(path);
4383         xpt_free_ccb(ccb);
4384 }
4385
4386 static void
4387 xpt_async_bcast(struct async_list *async_head,
4388                 u_int32_t async_code,
4389                 struct cam_path *path, void *async_arg)
4390 {
4391         struct async_node *cur_entry;
4392         struct mtx *mtx;
4393
4394         cur_entry = SLIST_FIRST(async_head);
4395         while (cur_entry != NULL) {
4396                 struct async_node *next_entry;
4397                 /*
4398                  * Grab the next list entry before we call the current
4399                  * entry's callback.  This is because the callback function
4400                  * can delete its async callback entry.
4401                  */
4402                 next_entry = SLIST_NEXT(cur_entry, links);
4403                 if ((cur_entry->event_enable & async_code) != 0) {
4404                         mtx = cur_entry->event_lock ?
4405                             path->device->sim->mtx : NULL;
4406                         if (mtx)
4407                                 mtx_lock(mtx);
4408                         cur_entry->callback(cur_entry->callback_arg,
4409                                             async_code, path,
4410                                             async_arg);
4411                         if (mtx)
4412                                 mtx_unlock(mtx);
4413                 }
4414                 cur_entry = next_entry;
4415         }
4416 }
4417
4418 void
4419 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4420 {
4421         union ccb *ccb;
4422         int size;
4423
4424         ccb = xpt_alloc_ccb_nowait();
4425         if (ccb == NULL) {
4426                 xpt_print(path, "Can't allocate CCB to send %s\n",
4427                     xpt_async_string(async_code));
4428                 return;
4429         }
4430
4431         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4432                 xpt_print(path, "Can't allocate path to send %s\n",
4433                     xpt_async_string(async_code));
4434                 xpt_free_ccb(ccb);
4435                 return;
4436         }
4437         ccb->ccb_h.path->periph = NULL;
4438         ccb->ccb_h.func_code = XPT_ASYNC;
4439         ccb->ccb_h.cbfcnp = xpt_async_process;
4440         ccb->ccb_h.flags |= CAM_UNLOCKED;
4441         ccb->casync.async_code = async_code;
4442         ccb->casync.async_arg_size = 0;
4443         size = xpt_async_size(async_code);
4444         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
4445             ("xpt_async: func %#x %s aync_code %d %s\n",
4446                 ccb->ccb_h.func_code,
4447                 xpt_action_name(ccb->ccb_h.func_code),
4448                 async_code,
4449                 xpt_async_string(async_code)));
4450         if (size > 0 && async_arg != NULL) {
4451                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4452                 if (ccb->casync.async_arg_ptr == NULL) {
4453                         xpt_print(path, "Can't allocate argument to send %s\n",
4454                             xpt_async_string(async_code));
4455                         xpt_free_path(ccb->ccb_h.path);
4456                         xpt_free_ccb(ccb);
4457                         return;
4458                 }
4459                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4460                 ccb->casync.async_arg_size = size;
4461         } else if (size < 0) {
4462                 ccb->casync.async_arg_ptr = async_arg;
4463                 ccb->casync.async_arg_size = size;
4464         }
4465         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4466                 xpt_freeze_devq(path, 1);
4467         else
4468                 xpt_freeze_simq(path->bus->sim, 1);
4469         xpt_done(ccb);
4470 }
4471
4472 static void
4473 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4474                       struct cam_et *target, struct cam_ed *device,
4475                       void *async_arg)
4476 {
4477
4478         /*
4479          * We only need to handle events for real devices.
4480          */
4481         if (target->target_id == CAM_TARGET_WILDCARD
4482          || device->lun_id == CAM_LUN_WILDCARD)
4483                 return;
4484
4485         printf("%s called\n", __func__);
4486 }
4487
4488 static uint32_t
4489 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4490 {
4491         struct cam_devq *devq;
4492         uint32_t freeze;
4493
4494         devq = dev->sim->devq;
4495         mtx_assert(&devq->send_mtx, MA_OWNED);
4496         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4497             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4498             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4499         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4500         /* Remove frozen device from sendq. */
4501         if (device_is_queued(dev))
4502                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4503         return (freeze);
4504 }
4505
4506 u_int32_t
4507 xpt_freeze_devq(struct cam_path *path, u_int count)
4508 {
4509         struct cam_ed   *dev = path->device;
4510         struct cam_devq *devq;
4511         uint32_t         freeze;
4512
4513         devq = dev->sim->devq;
4514         mtx_lock(&devq->send_mtx);
4515         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4516         freeze = xpt_freeze_devq_device(dev, count);
4517         mtx_unlock(&devq->send_mtx);
4518         return (freeze);
4519 }
4520
4521 u_int32_t
4522 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4523 {
4524         struct cam_devq *devq;
4525         uint32_t         freeze;
4526
4527         devq = sim->devq;
4528         mtx_lock(&devq->send_mtx);
4529         freeze = (devq->send_queue.qfrozen_cnt += count);
4530         mtx_unlock(&devq->send_mtx);
4531         return (freeze);
4532 }
4533
4534 static void
4535 xpt_release_devq_timeout(void *arg)
4536 {
4537         struct cam_ed *dev;
4538         struct cam_devq *devq;
4539
4540         dev = (struct cam_ed *)arg;
4541         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4542         devq = dev->sim->devq;
4543         mtx_assert(&devq->send_mtx, MA_OWNED);
4544         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4545                 xpt_run_devq(devq);
4546 }
4547
4548 void
4549 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4550 {
4551         struct cam_ed *dev;
4552         struct cam_devq *devq;
4553
4554         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4555             count, run_queue));
4556         dev = path->device;
4557         devq = dev->sim->devq;
4558         mtx_lock(&devq->send_mtx);
4559         if (xpt_release_devq_device(dev, count, run_queue))
4560                 xpt_run_devq(dev->sim->devq);
4561         mtx_unlock(&devq->send_mtx);
4562 }
4563
4564 static int
4565 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4566 {
4567
4568         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4569         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4570             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4571             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4572         if (count > dev->ccbq.queue.qfrozen_cnt) {
4573 #ifdef INVARIANTS
4574                 printf("xpt_release_devq(): requested %u > present %u\n",
4575                     count, dev->ccbq.queue.qfrozen_cnt);
4576 #endif
4577                 count = dev->ccbq.queue.qfrozen_cnt;
4578         }
4579         dev->ccbq.queue.qfrozen_cnt -= count;
4580         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4581                 /*
4582                  * No longer need to wait for a successful
4583                  * command completion.
4584                  */
4585                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4586                 /*
4587                  * Remove any timeouts that might be scheduled
4588                  * to release this queue.
4589                  */
4590                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4591                         callout_stop(&dev->callout);
4592                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4593                 }
4594                 /*
4595                  * Now that we are unfrozen schedule the
4596                  * device so any pending transactions are
4597                  * run.
4598                  */
4599                 xpt_schedule_devq(dev->sim->devq, dev);
4600         } else
4601                 run_queue = 0;
4602         return (run_queue);
4603 }
4604
4605 void
4606 xpt_release_simq(struct cam_sim *sim, int run_queue)
4607 {
4608         struct cam_devq *devq;
4609
4610         devq = sim->devq;
4611         mtx_lock(&devq->send_mtx);
4612         if (devq->send_queue.qfrozen_cnt <= 0) {
4613 #ifdef INVARIANTS
4614                 printf("xpt_release_simq: requested 1 > present %u\n",
4615                     devq->send_queue.qfrozen_cnt);
4616 #endif
4617         } else
4618                 devq->send_queue.qfrozen_cnt--;
4619         if (devq->send_queue.qfrozen_cnt == 0) {
4620                 /*
4621                  * If there is a timeout scheduled to release this
4622                  * sim queue, remove it.  The queue frozen count is
4623                  * already at 0.
4624                  */
4625                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4626                         callout_stop(&sim->callout);
4627                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4628                 }
4629                 if (run_queue) {
4630                         /*
4631                          * Now that we are unfrozen run the send queue.
4632                          */
4633                         xpt_run_devq(sim->devq);
4634                 }
4635         }
4636         mtx_unlock(&devq->send_mtx);
4637 }
4638
4639 /*
4640  * XXX Appears to be unused.
4641  */
4642 static void
4643 xpt_release_simq_timeout(void *arg)
4644 {
4645         struct cam_sim *sim;
4646
4647         sim = (struct cam_sim *)arg;
4648         xpt_release_simq(sim, /* run_queue */ TRUE);
4649 }
4650
4651 void
4652 xpt_done(union ccb *done_ccb)
4653 {
4654         struct cam_doneq *queue;
4655         int     run, hash;
4656
4657 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4658         if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4659             done_ccb->csio.bio != NULL)
4660                 biotrack(done_ccb->csio.bio, __func__);
4661 #endif
4662
4663         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4664             ("xpt_done: func= %#x %s status %#x\n",
4665                 done_ccb->ccb_h.func_code,
4666                 xpt_action_name(done_ccb->ccb_h.func_code),
4667                 done_ccb->ccb_h.status));
4668         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4669                 return;
4670
4671         /* Store the time the ccb was in the sim */
4672         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4673         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4674             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4675         queue = &cam_doneqs[hash];
4676         mtx_lock(&queue->cam_doneq_mtx);
4677         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4678         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4679         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4680         mtx_unlock(&queue->cam_doneq_mtx);
4681         if (run)
4682                 wakeup(&queue->cam_doneq);
4683 }
4684
4685 void
4686 xpt_done_direct(union ccb *done_ccb)
4687 {
4688
4689         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4690             ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4691         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4692                 return;
4693
4694         /* Store the time the ccb was in the sim */
4695         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4696         xpt_done_process(&done_ccb->ccb_h);
4697 }
4698
4699 union ccb *
4700 xpt_alloc_ccb()
4701 {
4702         union ccb *new_ccb;
4703
4704         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4705         return (new_ccb);
4706 }
4707
4708 union ccb *
4709 xpt_alloc_ccb_nowait()
4710 {
4711         union ccb *new_ccb;
4712
4713         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4714         return (new_ccb);
4715 }
4716
4717 void
4718 xpt_free_ccb(union ccb *free_ccb)
4719 {
4720         free(free_ccb, M_CAMCCB);
4721 }
4722
4723
4724
4725 /* Private XPT functions */
4726
4727 /*
4728  * Get a CAM control block for the caller. Charge the structure to the device
4729  * referenced by the path.  If we don't have sufficient resources to allocate
4730  * more ccbs, we return NULL.
4731  */
4732 static union ccb *
4733 xpt_get_ccb_nowait(struct cam_periph *periph)
4734 {
4735         union ccb *new_ccb;
4736
4737         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4738         if (new_ccb == NULL)
4739                 return (NULL);
4740         periph->periph_allocated++;
4741         cam_ccbq_take_opening(&periph->path->device->ccbq);
4742         return (new_ccb);
4743 }
4744
4745 static union ccb *
4746 xpt_get_ccb(struct cam_periph *periph)
4747 {
4748         union ccb *new_ccb;
4749
4750         cam_periph_unlock(periph);
4751         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4752         cam_periph_lock(periph);
4753         periph->periph_allocated++;
4754         cam_ccbq_take_opening(&periph->path->device->ccbq);
4755         return (new_ccb);
4756 }
4757
4758 union ccb *
4759 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4760 {
4761         struct ccb_hdr *ccb_h;
4762
4763         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4764         cam_periph_assert(periph, MA_OWNED);
4765         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4766             ccb_h->pinfo.priority != priority) {
4767                 if (priority < periph->immediate_priority) {
4768                         periph->immediate_priority = priority;
4769                         xpt_run_allocq(periph, 0);
4770                 } else
4771                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4772                             "cgticb", 0);
4773         }
4774         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4775         return ((union ccb *)ccb_h);
4776 }
4777
4778 static void
4779 xpt_acquire_bus(struct cam_eb *bus)
4780 {
4781
4782         xpt_lock_buses();
4783         bus->refcount++;
4784         xpt_unlock_buses();
4785 }
4786
4787 static void
4788 xpt_release_bus(struct cam_eb *bus)
4789 {
4790
4791         xpt_lock_buses();
4792         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4793         if (--bus->refcount > 0) {
4794                 xpt_unlock_buses();
4795                 return;
4796         }
4797         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4798         xsoftc.bus_generation++;
4799         xpt_unlock_buses();
4800         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4801             ("destroying bus, but target list is not empty"));
4802         cam_sim_release(bus->sim);
4803         mtx_destroy(&bus->eb_mtx);
4804         free(bus, M_CAMXPT);
4805 }
4806
4807 static struct cam_et *
4808 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4809 {
4810         struct cam_et *cur_target, *target;
4811
4812         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4813         mtx_assert(&bus->eb_mtx, MA_OWNED);
4814         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4815                                          M_NOWAIT|M_ZERO);
4816         if (target == NULL)
4817                 return (NULL);
4818
4819         TAILQ_INIT(&target->ed_entries);
4820         target->bus = bus;
4821         target->target_id = target_id;
4822         target->refcount = 1;
4823         target->generation = 0;
4824         target->luns = NULL;
4825         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4826         timevalclear(&target->last_reset);
4827         /*
4828          * Hold a reference to our parent bus so it
4829          * will not go away before we do.
4830          */
4831         bus->refcount++;
4832
4833         /* Insertion sort into our bus's target list */
4834         cur_target = TAILQ_FIRST(&bus->et_entries);
4835         while (cur_target != NULL && cur_target->target_id < target_id)
4836                 cur_target = TAILQ_NEXT(cur_target, links);
4837         if (cur_target != NULL) {
4838                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4839         } else {
4840                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4841         }
4842         bus->generation++;
4843         return (target);
4844 }
4845
4846 static void
4847 xpt_acquire_target(struct cam_et *target)
4848 {
4849         struct cam_eb *bus = target->bus;
4850
4851         mtx_lock(&bus->eb_mtx);
4852         target->refcount++;
4853         mtx_unlock(&bus->eb_mtx);
4854 }
4855
4856 static void
4857 xpt_release_target(struct cam_et *target)
4858 {
4859         struct cam_eb *bus = target->bus;
4860
4861         mtx_lock(&bus->eb_mtx);
4862         if (--target->refcount > 0) {
4863                 mtx_unlock(&bus->eb_mtx);
4864                 return;
4865         }
4866         TAILQ_REMOVE(&bus->et_entries, target, links);
4867         bus->generation++;
4868         mtx_unlock(&bus->eb_mtx);
4869         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4870             ("destroying target, but device list is not empty"));
4871         xpt_release_bus(bus);
4872         mtx_destroy(&target->luns_mtx);
4873         if (target->luns)
4874                 free(target->luns, M_CAMXPT);
4875         free(target, M_CAMXPT);
4876 }
4877
4878 static struct cam_ed *
4879 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4880                          lun_id_t lun_id)
4881 {
4882         struct cam_ed *device;
4883
4884         device = xpt_alloc_device(bus, target, lun_id);
4885         if (device == NULL)
4886                 return (NULL);
4887
4888         device->mintags = 1;
4889         device->maxtags = 1;
4890         return (device);
4891 }
4892
4893 static void
4894 xpt_destroy_device(void *context, int pending)
4895 {
4896         struct cam_ed   *device = context;
4897
4898         mtx_lock(&device->device_mtx);
4899         mtx_destroy(&device->device_mtx);
4900         free(device, M_CAMDEV);
4901 }
4902
4903 struct cam_ed *
4904 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4905 {
4906         struct cam_ed   *cur_device, *device;
4907         struct cam_devq *devq;
4908         cam_status status;
4909
4910         mtx_assert(&bus->eb_mtx, MA_OWNED);
4911         /* Make space for us in the device queue on our bus */
4912         devq = bus->sim->devq;
4913         mtx_lock(&devq->send_mtx);
4914         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4915         mtx_unlock(&devq->send_mtx);
4916         if (status != CAM_REQ_CMP)
4917                 return (NULL);
4918
4919         device = (struct cam_ed *)malloc(sizeof(*device),
4920                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4921         if (device == NULL)
4922                 return (NULL);
4923
4924         cam_init_pinfo(&device->devq_entry);
4925         device->target = target;
4926         device->lun_id = lun_id;
4927         device->sim = bus->sim;
4928         if (cam_ccbq_init(&device->ccbq,
4929                           bus->sim->max_dev_openings) != 0) {
4930                 free(device, M_CAMDEV);
4931                 return (NULL);
4932         }
4933         SLIST_INIT(&device->asyncs);
4934         SLIST_INIT(&device->periphs);
4935         device->generation = 0;
4936         device->flags = CAM_DEV_UNCONFIGURED;
4937         device->tag_delay_count = 0;
4938         device->tag_saved_openings = 0;
4939         device->refcount = 1;
4940         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4941         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4942         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4943         /*
4944          * Hold a reference to our parent bus so it
4945          * will not go away before we do.
4946          */
4947         target->refcount++;
4948
4949         cur_device = TAILQ_FIRST(&target->ed_entries);
4950         while (cur_device != NULL && cur_device->lun_id < lun_id)
4951                 cur_device = TAILQ_NEXT(cur_device, links);
4952         if (cur_device != NULL)
4953                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4954         else
4955                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4956         target->generation++;
4957         return (device);
4958 }
4959
4960 void
4961 xpt_acquire_device(struct cam_ed *device)
4962 {
4963         struct cam_eb *bus = device->target->bus;
4964
4965         mtx_lock(&bus->eb_mtx);
4966         device->refcount++;
4967         mtx_unlock(&bus->eb_mtx);
4968 }
4969
4970 void
4971 xpt_release_device(struct cam_ed *device)
4972 {
4973         struct cam_eb *bus = device->target->bus;
4974         struct cam_devq *devq;
4975
4976         mtx_lock(&bus->eb_mtx);
4977         if (--device->refcount > 0) {
4978                 mtx_unlock(&bus->eb_mtx);
4979                 return;
4980         }
4981
4982         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4983         device->target->generation++;
4984         mtx_unlock(&bus->eb_mtx);
4985
4986         /* Release our slot in the devq */
4987         devq = bus->sim->devq;
4988         mtx_lock(&devq->send_mtx);
4989         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4990         mtx_unlock(&devq->send_mtx);
4991
4992         KASSERT(SLIST_EMPTY(&device->periphs),
4993             ("destroying device, but periphs list is not empty"));
4994         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4995             ("destroying device while still queued for ccbs"));
4996
4997         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4998                 callout_stop(&device->callout);
4999
5000         xpt_release_target(device->target);
5001
5002         cam_ccbq_fini(&device->ccbq);
5003         /*
5004          * Free allocated memory.  free(9) does nothing if the
5005          * supplied pointer is NULL, so it is safe to call without
5006          * checking.
5007          */
5008         free(device->supported_vpds, M_CAMXPT);
5009         free(device->device_id, M_CAMXPT);
5010         free(device->ext_inq, M_CAMXPT);
5011         free(device->physpath, M_CAMXPT);
5012         free(device->rcap_buf, M_CAMXPT);
5013         free(device->serial_num, M_CAMXPT);
5014         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
5015 }
5016
5017 u_int32_t
5018 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
5019 {
5020         int     result;
5021         struct  cam_ed *dev;
5022
5023         dev = path->device;
5024         mtx_lock(&dev->sim->devq->send_mtx);
5025         result = cam_ccbq_resize(&dev->ccbq, newopenings);
5026         mtx_unlock(&dev->sim->devq->send_mtx);
5027         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5028          || (dev->inq_flags & SID_CmdQue) != 0)
5029                 dev->tag_saved_openings = newopenings;
5030         return (result);
5031 }
5032
5033 static struct cam_eb *
5034 xpt_find_bus(path_id_t path_id)
5035 {
5036         struct cam_eb *bus;
5037
5038         xpt_lock_buses();
5039         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
5040              bus != NULL;
5041              bus = TAILQ_NEXT(bus, links)) {
5042                 if (bus->path_id == path_id) {
5043                         bus->refcount++;
5044                         break;
5045                 }
5046         }
5047         xpt_unlock_buses();
5048         return (bus);
5049 }
5050
5051 static struct cam_et *
5052 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5053 {
5054         struct cam_et *target;
5055
5056         mtx_assert(&bus->eb_mtx, MA_OWNED);
5057         for (target = TAILQ_FIRST(&bus->et_entries);
5058              target != NULL;
5059              target = TAILQ_NEXT(target, links)) {
5060                 if (target->target_id == target_id) {
5061                         target->refcount++;
5062                         break;
5063                 }
5064         }
5065         return (target);
5066 }
5067
5068 static struct cam_ed *
5069 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5070 {
5071         struct cam_ed *device;
5072
5073         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
5074         for (device = TAILQ_FIRST(&target->ed_entries);
5075              device != NULL;
5076              device = TAILQ_NEXT(device, links)) {
5077                 if (device->lun_id == lun_id) {
5078                         device->refcount++;
5079                         break;
5080                 }
5081         }
5082         return (device);
5083 }
5084
5085 void
5086 xpt_start_tags(struct cam_path *path)
5087 {
5088         struct ccb_relsim crs;
5089         struct cam_ed *device;
5090         struct cam_sim *sim;
5091         int    newopenings;
5092
5093         device = path->device;
5094         sim = path->bus->sim;
5095         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5096         xpt_freeze_devq(path, /*count*/1);
5097         device->inq_flags |= SID_CmdQue;
5098         if (device->tag_saved_openings != 0)
5099                 newopenings = device->tag_saved_openings;
5100         else
5101                 newopenings = min(device->maxtags,
5102                                   sim->max_tagged_dev_openings);
5103         xpt_dev_ccbq_resize(path, newopenings);
5104         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5105         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5106         crs.ccb_h.func_code = XPT_REL_SIMQ;
5107         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5108         crs.openings
5109             = crs.release_timeout
5110             = crs.qfrozen_cnt
5111             = 0;
5112         xpt_action((union ccb *)&crs);
5113 }
5114
5115 void
5116 xpt_stop_tags(struct cam_path *path)
5117 {
5118         struct ccb_relsim crs;
5119         struct cam_ed *device;
5120         struct cam_sim *sim;
5121
5122         device = path->device;
5123         sim = path->bus->sim;
5124         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5125         device->tag_delay_count = 0;
5126         xpt_freeze_devq(path, /*count*/1);
5127         device->inq_flags &= ~SID_CmdQue;
5128         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
5129         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5130         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5131         crs.ccb_h.func_code = XPT_REL_SIMQ;
5132         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5133         crs.openings
5134             = crs.release_timeout
5135             = crs.qfrozen_cnt
5136             = 0;
5137         xpt_action((union ccb *)&crs);
5138 }
5139
5140 static void
5141 xpt_boot_delay(void *arg)
5142 {
5143
5144         xpt_release_boot();
5145 }
5146
5147 static void
5148 xpt_config(void *arg)
5149 {
5150         /*
5151          * Now that interrupts are enabled, go find our devices
5152          */
5153         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
5154                 printf("xpt_config: failed to create taskqueue thread.\n");
5155
5156         /* Setup debugging path */
5157         if (cam_dflags != CAM_DEBUG_NONE) {
5158                 if (xpt_create_path(&cam_dpath, NULL,
5159                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
5160                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
5161                         printf("xpt_config: xpt_create_path() failed for debug"
5162                                " target %d:%d:%d, debugging disabled\n",
5163                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
5164                         cam_dflags = CAM_DEBUG_NONE;
5165                 }
5166         } else
5167                 cam_dpath = NULL;
5168
5169         periphdriver_init(1);
5170         xpt_hold_boot();
5171         callout_init(&xsoftc.boot_callout, 1);
5172         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5173             xpt_boot_delay, NULL, 0);
5174         /* Fire up rescan thread. */
5175         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5176             "cam", "scanner")) {
5177                 printf("xpt_config: failed to create rescan thread.\n");
5178         }
5179 }
5180
5181 void
5182 xpt_hold_boot(void)
5183 {
5184         xpt_lock_buses();
5185         xsoftc.buses_to_config++;
5186         xpt_unlock_buses();
5187 }
5188
5189 void
5190 xpt_release_boot(void)
5191 {
5192         xpt_lock_buses();
5193         xsoftc.buses_to_config--;
5194         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
5195                 struct  xpt_task *task;
5196
5197                 xsoftc.buses_config_done = 1;
5198                 xpt_unlock_buses();
5199                 /* Call manually because we don't have any buses */
5200                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
5201                 if (task != NULL) {
5202                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
5203                         taskqueue_enqueue(taskqueue_thread, &task->task);
5204                 }
5205         } else
5206                 xpt_unlock_buses();
5207 }
5208
5209 /*
5210  * If the given device only has one peripheral attached to it, and if that
5211  * peripheral is the passthrough driver, announce it.  This insures that the
5212  * user sees some sort of announcement for every peripheral in their system.
5213  */
5214 static int
5215 xptpassannouncefunc(struct cam_ed *device, void *arg)
5216 {
5217         struct cam_periph *periph;
5218         int i;
5219
5220         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5221              periph = SLIST_NEXT(periph, periph_links), i++);
5222
5223         periph = SLIST_FIRST(&device->periphs);
5224         if ((i == 1)
5225          && (strncmp(periph->periph_name, "pass", 4) == 0))
5226                 xpt_announce_periph(periph, NULL);
5227
5228         return(1);
5229 }
5230
5231 static void
5232 xpt_finishconfig_task(void *context, int pending)
5233 {
5234
5235         periphdriver_init(2);
5236         /*
5237          * Check for devices with no "standard" peripheral driver
5238          * attached.  For any devices like that, announce the
5239          * passthrough driver so the user will see something.
5240          */
5241         if (!bootverbose)
5242                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5243
5244         /* Release our hook so that the boot can continue. */
5245         config_intrhook_disestablish(xsoftc.xpt_config_hook);
5246         free(xsoftc.xpt_config_hook, M_CAMXPT);
5247         xsoftc.xpt_config_hook = NULL;
5248
5249         free(context, M_CAMXPT);
5250 }
5251
5252 cam_status
5253 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5254                    struct cam_path *path)
5255 {
5256         struct ccb_setasync csa;
5257         cam_status status;
5258         int xptpath = 0;
5259
5260         if (path == NULL) {
5261                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5262                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5263                 if (status != CAM_REQ_CMP)
5264                         return (status);
5265                 xpt_path_lock(path);
5266                 xptpath = 1;
5267         }
5268
5269         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5270         csa.ccb_h.func_code = XPT_SASYNC_CB;
5271         csa.event_enable = event;
5272         csa.callback = cbfunc;
5273         csa.callback_arg = cbarg;
5274         xpt_action((union ccb *)&csa);
5275         status = csa.ccb_h.status;
5276
5277         CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5278             ("xpt_register_async: func %p\n", cbfunc));
5279
5280         if (xptpath) {
5281                 xpt_path_unlock(path);
5282                 xpt_free_path(path);
5283         }
5284
5285         if ((status == CAM_REQ_CMP) &&
5286             (csa.event_enable & AC_FOUND_DEVICE)) {
5287                 /*
5288                  * Get this peripheral up to date with all
5289                  * the currently existing devices.
5290                  */
5291                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5292         }
5293         if ((status == CAM_REQ_CMP) &&
5294             (csa.event_enable & AC_PATH_REGISTERED)) {
5295                 /*
5296                  * Get this peripheral up to date with all
5297                  * the currently existing buses.
5298                  */
5299                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5300         }
5301
5302         return (status);
5303 }
5304
5305 static void
5306 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5307 {
5308         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5309
5310         switch (work_ccb->ccb_h.func_code) {
5311         /* Common cases first */
5312         case XPT_PATH_INQ:              /* Path routing inquiry */
5313         {
5314                 struct ccb_pathinq *cpi;
5315
5316                 cpi = &work_ccb->cpi;
5317                 cpi->version_num = 1; /* XXX??? */
5318                 cpi->hba_inquiry = 0;
5319                 cpi->target_sprt = 0;
5320                 cpi->hba_misc = 0;
5321                 cpi->hba_eng_cnt = 0;
5322                 cpi->max_target = 0;
5323                 cpi->max_lun = 0;
5324                 cpi->initiator_id = 0;
5325                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5326                 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5327                 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5328                 cpi->unit_number = sim->unit_number;
5329                 cpi->bus_id = sim->bus_id;
5330                 cpi->base_transfer_speed = 0;
5331                 cpi->protocol = PROTO_UNSPECIFIED;
5332                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5333                 cpi->transport = XPORT_UNSPECIFIED;
5334                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5335                 cpi->ccb_h.status = CAM_REQ_CMP;
5336                 xpt_done(work_ccb);
5337                 break;
5338         }
5339         default:
5340                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5341                 xpt_done(work_ccb);
5342                 break;
5343         }
5344 }
5345
5346 /*
5347  * The xpt as a "controller" has no interrupt sources, so polling
5348  * is a no-op.
5349  */
5350 static void
5351 xptpoll(struct cam_sim *sim)
5352 {
5353 }
5354
5355 void
5356 xpt_lock_buses(void)
5357 {
5358         mtx_lock(&xsoftc.xpt_topo_lock);
5359 }
5360
5361 void
5362 xpt_unlock_buses(void)
5363 {
5364         mtx_unlock(&xsoftc.xpt_topo_lock);
5365 }
5366
5367 struct mtx *
5368 xpt_path_mtx(struct cam_path *path)
5369 {
5370
5371         return (&path->device->device_mtx);
5372 }
5373
5374 static void
5375 xpt_done_process(struct ccb_hdr *ccb_h)
5376 {
5377         struct cam_sim *sim = NULL;
5378         struct cam_devq *devq = NULL;
5379         struct mtx *mtx = NULL;
5380
5381 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5382         struct ccb_scsiio *csio;
5383
5384         if (ccb_h->func_code == XPT_SCSI_IO) {
5385                 csio = &((union ccb *)ccb_h)->csio;
5386                 if (csio->bio != NULL)
5387                         biotrack(csio->bio, __func__);
5388         }
5389 #endif
5390
5391         if (ccb_h->flags & CAM_HIGH_POWER) {
5392                 struct highpowerlist    *hphead;
5393                 struct cam_ed           *device;
5394
5395                 mtx_lock(&xsoftc.xpt_highpower_lock);
5396                 hphead = &xsoftc.highpowerq;
5397
5398                 device = STAILQ_FIRST(hphead);
5399
5400                 /*
5401                  * Increment the count since this command is done.
5402                  */
5403                 xsoftc.num_highpower++;
5404
5405                 /*
5406                  * Any high powered commands queued up?
5407                  */
5408                 if (device != NULL) {
5409
5410                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5411                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5412
5413                         mtx_lock(&device->sim->devq->send_mtx);
5414                         xpt_release_devq_device(device,
5415                                          /*count*/1, /*runqueue*/TRUE);
5416                         mtx_unlock(&device->sim->devq->send_mtx);
5417                 } else
5418                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5419         }
5420
5421         /*
5422          * Insulate against a race where the periph is destroyed
5423          * but CCBs are still not all processed.
5424          */
5425         if (ccb_h->path->bus)
5426                 sim = ccb_h->path->bus->sim;
5427
5428         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5429                 KASSERT(sim, ("sim missing for CAM_RELEASE_SIMQ request"));
5430                 xpt_release_simq(sim, /*run_queue*/FALSE);
5431                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5432         }
5433
5434         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5435          && (ccb_h->status & CAM_DEV_QFRZN)) {
5436                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5437                 ccb_h->status &= ~CAM_DEV_QFRZN;
5438         }
5439
5440         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5441                 struct cam_ed *dev = ccb_h->path->device;
5442
5443                 if (sim)
5444                         devq = sim->devq;
5445                 KASSERT(devq, ("sim missing for XPT_FC_USER_CCB request"));
5446
5447                 mtx_lock(&devq->send_mtx);
5448                 devq->send_active--;
5449                 devq->send_openings++;
5450                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5451
5452                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5453                   && (dev->ccbq.dev_active == 0))) {
5454                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5455                         xpt_release_devq_device(dev, /*count*/1,
5456                                          /*run_queue*/FALSE);
5457                 }
5458
5459                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5460                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5461                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5462                         xpt_release_devq_device(dev, /*count*/1,
5463                                          /*run_queue*/FALSE);
5464                 }
5465
5466                 if (!device_is_queued(dev))
5467                         (void)xpt_schedule_devq(devq, dev);
5468                 xpt_run_devq(devq);
5469                 mtx_unlock(&devq->send_mtx);
5470
5471                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5472                         mtx = xpt_path_mtx(ccb_h->path);
5473                         mtx_lock(mtx);
5474
5475                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5476                          && (--dev->tag_delay_count == 0))
5477                                 xpt_start_tags(ccb_h->path);
5478                 }
5479         }
5480
5481         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5482                 if (mtx == NULL) {
5483                         mtx = xpt_path_mtx(ccb_h->path);
5484                         mtx_lock(mtx);
5485                 }
5486         } else {
5487                 if (mtx != NULL) {
5488                         mtx_unlock(mtx);
5489                         mtx = NULL;
5490                 }
5491         }
5492
5493         /* Call the peripheral driver's callback */
5494         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5495         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5496         if (mtx != NULL)
5497                 mtx_unlock(mtx);
5498 }
5499
5500 void
5501 xpt_done_td(void *arg)
5502 {
5503         struct cam_doneq *queue = arg;
5504         struct ccb_hdr *ccb_h;
5505         STAILQ_HEAD(, ccb_hdr)  doneq;
5506
5507         STAILQ_INIT(&doneq);
5508         mtx_lock(&queue->cam_doneq_mtx);
5509         while (1) {
5510                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5511                         queue->cam_doneq_sleep = 1;
5512                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5513                             PRIBIO, "-", 0);
5514                         queue->cam_doneq_sleep = 0;
5515                 }
5516                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5517                 mtx_unlock(&queue->cam_doneq_mtx);
5518
5519                 THREAD_NO_SLEEPING();
5520                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5521                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5522                         xpt_done_process(ccb_h);
5523                 }
5524                 THREAD_SLEEPING_OK();
5525
5526                 mtx_lock(&queue->cam_doneq_mtx);
5527         }
5528 }
5529
5530 static void
5531 camisr_runqueue(void)
5532 {
5533         struct  ccb_hdr *ccb_h;
5534         struct cam_doneq *queue;
5535         int i;
5536
5537         /* Process global queues. */
5538         for (i = 0; i < cam_num_doneqs; i++) {
5539                 queue = &cam_doneqs[i];
5540                 mtx_lock(&queue->cam_doneq_mtx);
5541                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5542                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5543                         mtx_unlock(&queue->cam_doneq_mtx);
5544                         xpt_done_process(ccb_h);
5545                         mtx_lock(&queue->cam_doneq_mtx);
5546                 }
5547                 mtx_unlock(&queue->cam_doneq_mtx);
5548         }
5549 }
5550
5551 struct kv
5552 {
5553         uint32_t v;
5554         const char *name;
5555 };
5556
5557 static struct kv map[] = {
5558         { XPT_NOOP, "XPT_NOOP" },
5559         { XPT_SCSI_IO, "XPT_SCSI_IO" },
5560         { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5561         { XPT_GDEVLIST, "XPT_GDEVLIST" },
5562         { XPT_PATH_INQ, "XPT_PATH_INQ" },
5563         { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5564         { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5565         { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5566         { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5567         { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5568         { XPT_DEBUG, "XPT_DEBUG" },
5569         { XPT_PATH_STATS, "XPT_PATH_STATS" },
5570         { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5571         { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5572         { XPT_ASYNC, "XPT_ASYNC" },
5573         { XPT_ABORT, "XPT_ABORT" },
5574         { XPT_RESET_BUS, "XPT_RESET_BUS" },
5575         { XPT_RESET_DEV, "XPT_RESET_DEV" },
5576         { XPT_TERM_IO, "XPT_TERM_IO" },
5577         { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5578         { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5579         { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5580         { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5581         { XPT_ATA_IO, "XPT_ATA_IO" },
5582         { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5583         { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5584         { XPT_NVME_IO, "XPT_NVME_IO" },
5585         { XPT_MMC_IO, "XPT_MMC_IO" },
5586         { XPT_SMP_IO, "XPT_SMP_IO" },
5587         { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5588         { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" },
5589         { XPT_ENG_INQ, "XPT_ENG_INQ" },
5590         { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5591         { XPT_EN_LUN, "XPT_EN_LUN" },
5592         { XPT_TARGET_IO, "XPT_TARGET_IO" },
5593         { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5594         { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5595         { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5596         { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5597         { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5598         { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5599         { 0, 0 }
5600 };
5601
5602 const char *
5603 xpt_action_name(uint32_t action)
5604 {
5605         static char buffer[32]; /* Only for unknown messages -- racy */
5606         struct kv *walker = map;
5607
5608         while (walker->name != NULL) {
5609                 if (walker->v == action)
5610                         return (walker->name);
5611                 walker++;
5612         }
5613
5614         snprintf(buffer, sizeof(buffer), "%#x", action);
5615         return (buffer);
5616 }