sys/cam/cam_xpt.c

   1 /*-
   2  * Implementation of the Common Access Method Transport (XPT) layer.
   3  *
   4  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   5  *
   6  * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
   7  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions, and the following disclaimer,
  15  *    without modification, immediately at the beginning of the file.
  16  * 2. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include "opt_printf.h"
  33
  34 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD$");
  36
  37 #include <sys/param.h>
  38 #include <sys/bio.h>
  39 #include <sys/bus.h>
  40 #include <sys/systm.h>
  41 #include <sys/types.h>
  42 #include <sys/malloc.h>
  43 #include <sys/kernel.h>
  44 #include <sys/time.h>
  45 #include <sys/conf.h>
  46 #include <sys/fcntl.h>
  47 #include <sys/proc.h>
  48 #include <sys/sbuf.h>
  49 #include <sys/smp.h>
  50 #include <sys/taskqueue.h>
  51
  52 #include <sys/lock.h>
  53 #include <sys/mutex.h>
  54 #include <sys/sysctl.h>
  55 #include <sys/kthread.h>
  56
  57 #include <cam/cam.h>
  58 #include <cam/cam_ccb.h>
  59 #include <cam/cam_iosched.h>
  60 #include <cam/cam_periph.h>
  61 #include <cam/cam_queue.h>
  62 #include <cam/cam_sim.h>
  63 #include <cam/cam_xpt.h>
  64 #include <cam/cam_xpt_sim.h>
  65 #include <cam/cam_xpt_periph.h>
  66 #include <cam/cam_xpt_internal.h>
  67 #include <cam/cam_debug.h>
  68 #include <cam/cam_compat.h>
  69
  70 #include <cam/scsi/scsi_all.h>
  71 #include <cam/scsi/scsi_message.h>
  72 #include <cam/scsi/scsi_pass.h>
  73
  74 #include <machine/stdarg.h>     /* for xpt_print below */
  75
  76 #include "opt_cam.h"
  77
  78 /* Wild guess based on not wanting to grow the stack too much */
  79 #define XPT_PRINT_MAXLEN        512
  80 #ifdef PRINTF_BUFR_SIZE
  81 #define XPT_PRINT_LEN   PRINTF_BUFR_SIZE
  82 #else
  83 #define XPT_PRINT_LEN   128
  84 #endif
  85 _Static_assert(XPT_PRINT_LEN <= XPT_PRINT_MAXLEN, "XPT_PRINT_LEN is too large");
  86
  87 /*
  88  * This is the maximum number of high powered commands (e.g. start unit)
  89  * that can be outstanding at a particular time.
  90  */
  91 #ifndef CAM_MAX_HIGHPOWER
  92 #define CAM_MAX_HIGHPOWER  4
  93 #endif
  94
  95 /* Datastructures internal to the xpt layer */
  96 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
  97 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
  98 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
  99 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
 100
 101 struct xpt_softc {
 102         uint32_t                xpt_generation;
 103
 104         /* number of high powered commands that can go through right now */
 105         struct mtx              xpt_highpower_lock;
 106         STAILQ_HEAD(highpowerlist, cam_ed)      highpowerq;
 107         int                     num_highpower;
 108
 109         /* queue for handling async rescan requests. */
 110         TAILQ_HEAD(, ccb_hdr) ccb_scanq;
 111         int buses_to_config;
 112         int buses_config_done;
 113         int announce_nosbuf;
 114
 115         /*
 116          * Registered buses
 117          *
 118          * N.B., "busses" is an archaic spelling of "buses".  In new code
 119          * "buses" is preferred.
 120          */
 121         TAILQ_HEAD(,cam_eb)     xpt_busses;
 122         u_int                   bus_generation;
 123
 124         int                     boot_delay;
 125         struct callout          boot_callout;
 126         struct task             boot_task;
 127         struct root_hold_token  xpt_rootmount;
 128
 129         struct mtx              xpt_topo_lock;
 130         struct taskqueue        *xpt_taskq;
 131 };
 132
 133 typedef enum {
 134         DM_RET_COPY             = 0x01,
 135         DM_RET_FLAG_MASK        = 0x0f,
 136         DM_RET_NONE             = 0x00,
 137         DM_RET_STOP             = 0x10,
 138         DM_RET_DESCEND          = 0x20,
 139         DM_RET_ERROR            = 0x30,
 140         DM_RET_ACTION_MASK      = 0xf0
 141 } dev_match_ret;
 142
 143 typedef enum {
 144         XPT_DEPTH_BUS,
 145         XPT_DEPTH_TARGET,
 146         XPT_DEPTH_DEVICE,
 147         XPT_DEPTH_PERIPH
 148 } xpt_traverse_depth;
 149
 150 struct xpt_traverse_config {
 151         xpt_traverse_depth      depth;
 152         void                    *tr_func;
 153         void                    *tr_arg;
 154 };
 155
 156 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 157 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 158 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 159 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 160 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 161
 162 /* Transport layer configuration information */
 163 static struct xpt_softc xsoftc;
 164
 165 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
 166
 167 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
 168            &xsoftc.boot_delay, 0, "Bus registration wait time");
 169 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
 170             &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
 171 SYSCTL_INT(_kern_cam, OID_AUTO, announce_nosbuf, CTLFLAG_RWTUN,
 172             &xsoftc.announce_nosbuf, 0, "Don't use sbuf for announcements");
 173
 174 struct cam_doneq {
 175         struct mtx_padalign     cam_doneq_mtx;
 176         STAILQ_HEAD(, ccb_hdr)  cam_doneq;
 177         int                     cam_doneq_sleep;
 178 };
 179
 180 static struct cam_doneq cam_doneqs[MAXCPU];
 181 static u_int __read_mostly cam_num_doneqs;
 182 static struct proc *cam_proc;
 183 static struct cam_doneq cam_async;
 184
 185 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
 186            &cam_num_doneqs, 0, "Number of completion queues/threads");
 187
 188 struct cam_periph *xpt_periph;
 189
 190 static periph_init_t xpt_periph_init;
 191
 192 static struct periph_driver xpt_driver =
 193 {
 194         xpt_periph_init, "xpt",
 195         TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
 196         CAM_PERIPH_DRV_EARLY
 197 };
 198
 199 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 200
 201 static d_open_t xptopen;
 202 static d_close_t xptclose;
 203 static d_ioctl_t xptioctl;
 204 static d_ioctl_t xptdoioctl;
 205
 206 static struct cdevsw xpt_cdevsw = {
 207         .d_version =    D_VERSION,
 208         .d_flags =      0,
 209         .d_open =       xptopen,
 210         .d_close =      xptclose,
 211         .d_ioctl =      xptioctl,
 212         .d_name =       "xpt",
 213 };
 214
 215 /* Storage for debugging datastructures */
 216 struct cam_path *cam_dpath;
 217 u_int32_t __read_mostly cam_dflags = CAM_DEBUG_FLAGS;
 218 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN,
 219         &cam_dflags, 0, "Enabled debug flags");
 220 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
 221 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN,
 222         &cam_debug_delay, 0, "Delay in us after each debug message");
 223
 224 /* Our boot-time initialization hook */
 225 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 226
 227 static moduledata_t cam_moduledata = {
 228         "cam",
 229         cam_module_event_handler,
 230         NULL
 231 };
 232
 233 static int      xpt_init(void *);
 234
 235 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 236 MODULE_VERSION(cam, 1);
 237
 238 static void             xpt_async_bcast(struct async_list *async_head,
 239                                         u_int32_t async_code,
 240                                         struct cam_path *path,
 241                                         void *async_arg);
 242 static path_id_t xptnextfreepathid(void);
 243 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 244 static union ccb *xpt_get_ccb(struct cam_periph *periph);
 245 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
 246 static void      xpt_run_allocq(struct cam_periph *periph, int sleep);
 247 static void      xpt_run_allocq_task(void *context, int pending);
 248 static void      xpt_run_devq(struct cam_devq *devq);
 249 static callout_func_t xpt_release_devq_timeout;
 250 static void      xpt_acquire_bus(struct cam_eb *bus);
 251 static void      xpt_release_bus(struct cam_eb *bus);
 252 static uint32_t  xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
 253 static int       xpt_release_devq_device(struct cam_ed *dev, u_int count,
 254                     int run_queue);
 255 static struct cam_et*
 256                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 257 static void      xpt_acquire_target(struct cam_et *target);
 258 static void      xpt_release_target(struct cam_et *target);
 259 static struct cam_eb*
 260                  xpt_find_bus(path_id_t path_id);
 261 static struct cam_et*
 262                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 263 static struct cam_ed*
 264                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 265 static void      xpt_config(void *arg);
 266 static void      xpt_hold_boot_locked(void);
 267 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 268                                  u_int32_t new_priority);
 269 static xpt_devicefunc_t xptpassannouncefunc;
 270 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 271 static void      xptpoll(struct cam_sim *sim);
 272 static void      camisr_runqueue(void);
 273 static void      xpt_done_process(struct ccb_hdr *ccb_h);
 274 static void      xpt_done_td(void *);
 275 static void      xpt_async_td(void *);
 276 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 277                                     u_int num_patterns, struct cam_eb *bus);
 278 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 279                                        u_int num_patterns,
 280                                        struct cam_ed *device);
 281 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 282                                        u_int num_patterns,
 283                                        struct cam_periph *periph);
 284 static xpt_busfunc_t    xptedtbusfunc;
 285 static xpt_targetfunc_t xptedttargetfunc;
 286 static xpt_devicefunc_t xptedtdevicefunc;
 287 static xpt_periphfunc_t xptedtperiphfunc;
 288 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 289 static xpt_periphfunc_t xptplistperiphfunc;
 290 static int              xptedtmatch(struct ccb_dev_match *cdm);
 291 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 292 static int              xptbustraverse(struct cam_eb *start_bus,
 293                                        xpt_busfunc_t *tr_func, void *arg);
 294 static int              xpttargettraverse(struct cam_eb *bus,
 295                                           struct cam_et *start_target,
 296                                           xpt_targetfunc_t *tr_func, void *arg);
 297 static int              xptdevicetraverse(struct cam_et *target,
 298                                           struct cam_ed *start_device,
 299                                           xpt_devicefunc_t *tr_func, void *arg);
 300 static int              xptperiphtraverse(struct cam_ed *device,
 301                                           struct cam_periph *start_periph,
 302                                           xpt_periphfunc_t *tr_func, void *arg);
 303 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 304                                         xpt_pdrvfunc_t *tr_func, void *arg);
 305 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 306                                             struct cam_periph *start_periph,
 307                                             xpt_periphfunc_t *tr_func,
 308                                             void *arg);
 309 static xpt_busfunc_t    xptdefbusfunc;
 310 static xpt_targetfunc_t xptdeftargetfunc;
 311 static xpt_devicefunc_t xptdefdevicefunc;
 312 static xpt_periphfunc_t xptdefperiphfunc;
 313 static void             xpt_finishconfig_task(void *context, int pending);
 314 static void             xpt_dev_async_default(u_int32_t async_code,
 315                                               struct cam_eb *bus,
 316                                               struct cam_et *target,
 317                                               struct cam_ed *device,
 318                                               void *async_arg);
 319 static struct cam_ed *  xpt_alloc_device_default(struct cam_eb *bus,
 320                                                  struct cam_et *target,
 321                                                  lun_id_t lun_id);
 322 static xpt_devicefunc_t xptsetasyncfunc;
 323 static xpt_busfunc_t    xptsetasyncbusfunc;
 324 static cam_status       xptregister(struct cam_periph *periph,
 325                                     void *arg);
 326
 327 static __inline int
 328 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 329 {
 330         int     retval;
 331
 332         mtx_assert(&devq->send_mtx, MA_OWNED);
 333         if ((dev->ccbq.queue.entries > 0) &&
 334             (dev->ccbq.dev_openings > 0) &&
 335             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 336                 /*
 337                  * The priority of a device waiting for controller
 338                  * resources is that of the highest priority CCB
 339                  * enqueued.
 340                  */
 341                 retval =
 342                     xpt_schedule_dev(&devq->send_queue,
 343                                      &dev->devq_entry,
 344                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 345         } else {
 346                 retval = 0;
 347         }
 348         return (retval);
 349 }
 350
 351 static __inline int
 352 device_is_queued(struct cam_ed *device)
 353 {
 354         return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
 355 }
 356
 357 static void
 358 xpt_periph_init(void)
 359 {
 360         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 361 }
 362
 363 static int
 364 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 365 {
 366
 367         /*
 368          * Only allow read-write access.
 369          */
 370         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 371                 return(EPERM);
 372
 373         /*
 374          * We don't allow nonblocking access.
 375          */
 376         if ((flags & O_NONBLOCK) != 0) {
 377                 printf("%s: can't do nonblocking access\n", devtoname(dev));
 378                 return(ENODEV);
 379         }
 380
 381         return(0);
 382 }
 383
 384 static int
 385 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 386 {
 387
 388         return(0);
 389 }
 390
 391 /*
 392  * Don't automatically grab the xpt softc lock here even though this is going
 393  * through the xpt device.  The xpt device is really just a back door for
 394  * accessing other devices and SIMs, so the right thing to do is to grab
 395  * the appropriate SIM lock once the bus/SIM is located.
 396  */
 397 static int
 398 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 399 {
 400         int error;
 401
 402         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 403                 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
 404         }
 405         return (error);
 406 }
 407
 408 static int
 409 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 410 {
 411         int error;
 412
 413         error = 0;
 414
 415         switch(cmd) {
 416         /*
 417          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 418          * to accept CCB types that don't quite make sense to send through a
 419          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 420          * in the CAM spec.
 421          */
 422         case CAMIOCOMMAND: {
 423                 union ccb *ccb;
 424                 union ccb *inccb;
 425                 struct cam_eb *bus;
 426
 427                 inccb = (union ccb *)addr;
 428 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 429                 if (inccb->ccb_h.func_code == XPT_SCSI_IO)
 430                         inccb->csio.bio = NULL;
 431 #endif
 432
 433                 if (inccb->ccb_h.flags & CAM_UNLOCKED)
 434                         return (EINVAL);
 435
 436                 bus = xpt_find_bus(inccb->ccb_h.path_id);
 437                 if (bus == NULL)
 438                         return (EINVAL);
 439
 440                 switch (inccb->ccb_h.func_code) {
 441                 case XPT_SCAN_BUS:
 442                 case XPT_RESET_BUS:
 443                         if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
 444                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 445                                 xpt_release_bus(bus);
 446                                 return (EINVAL);
 447                         }
 448                         break;
 449                 case XPT_SCAN_TGT:
 450                         if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
 451                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 452                                 xpt_release_bus(bus);
 453                                 return (EINVAL);
 454                         }
 455                         break;
 456                 default:
 457                         break;
 458                 }
 459
 460                 switch(inccb->ccb_h.func_code) {
 461                 case XPT_SCAN_BUS:
 462                 case XPT_RESET_BUS:
 463                 case XPT_PATH_INQ:
 464                 case XPT_ENG_INQ:
 465                 case XPT_SCAN_LUN:
 466                 case XPT_SCAN_TGT:
 467
 468                         ccb = xpt_alloc_ccb();
 469
 470                         /*
 471                          * Create a path using the bus, target, and lun the
 472                          * user passed in.
 473                          */
 474                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 475                                             inccb->ccb_h.path_id,
 476                                             inccb->ccb_h.target_id,
 477                                             inccb->ccb_h.target_lun) !=
 478                                             CAM_REQ_CMP){
 479                                 error = EINVAL;
 480                                 xpt_free_ccb(ccb);
 481                                 break;
 482                         }
 483                         /* Ensure all of our fields are correct */
 484                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 485                                       inccb->ccb_h.pinfo.priority);
 486                         xpt_merge_ccb(ccb, inccb);
 487                         xpt_path_lock(ccb->ccb_h.path);
 488                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 489                         xpt_path_unlock(ccb->ccb_h.path);
 490                         bcopy(ccb, inccb, sizeof(union ccb));
 491                         xpt_free_path(ccb->ccb_h.path);
 492                         xpt_free_ccb(ccb);
 493                         break;
 494
 495                 case XPT_DEBUG: {
 496                         union ccb ccb;
 497
 498                         /*
 499                          * This is an immediate CCB, so it's okay to
 500                          * allocate it on the stack.
 501                          */
 502                         memset(&ccb, 0, sizeof(ccb));
 503
 504                         /*
 505                          * Create a path using the bus, target, and lun the
 506                          * user passed in.
 507                          */
 508                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 509                                             inccb->ccb_h.path_id,
 510                                             inccb->ccb_h.target_id,
 511                                             inccb->ccb_h.target_lun) !=
 512                                             CAM_REQ_CMP){
 513                                 error = EINVAL;
 514                                 break;
 515                         }
 516                         /* Ensure all of our fields are correct */
 517                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 518                                       inccb->ccb_h.pinfo.priority);
 519                         xpt_merge_ccb(&ccb, inccb);
 520                         xpt_action(&ccb);
 521                         bcopy(&ccb, inccb, sizeof(union ccb));
 522                         xpt_free_path(ccb.ccb_h.path);
 523                         break;
 524                 }
 525                 case XPT_DEV_MATCH: {
 526                         struct cam_periph_map_info mapinfo;
 527                         struct cam_path *old_path;
 528
 529                         /*
 530                          * We can't deal with physical addresses for this
 531                          * type of transaction.
 532                          */
 533                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 534                             CAM_DATA_VADDR) {
 535                                 error = EINVAL;
 536                                 break;
 537                         }
 538
 539                         /*
 540                          * Save this in case the caller had it set to
 541                          * something in particular.
 542                          */
 543                         old_path = inccb->ccb_h.path;
 544
 545                         /*
 546                          * We really don't need a path for the matching
 547                          * code.  The path is needed because of the
 548                          * debugging statements in xpt_action().  They
 549                          * assume that the CCB has a valid path.
 550                          */
 551                         inccb->ccb_h.path = xpt_periph->path;
 552
 553                         bzero(&mapinfo, sizeof(mapinfo));
 554
 555                         /*
 556                          * Map the pattern and match buffers into kernel
 557                          * virtual address space.
 558                          */
 559                         error = cam_periph_mapmem(inccb, &mapinfo, maxphys);
 560
 561                         if (error) {
 562                                 inccb->ccb_h.path = old_path;
 563                                 break;
 564                         }
 565
 566                         /*
 567                          * This is an immediate CCB, we can send it on directly.
 568                          */
 569                         xpt_action(inccb);
 570
 571                         /*
 572                          * Map the buffers back into user space.
 573                          */
 574                         cam_periph_unmapmem(inccb, &mapinfo);
 575
 576                         inccb->ccb_h.path = old_path;
 577
 578                         error = 0;
 579                         break;
 580                 }
 581                 default:
 582                         error = ENOTSUP;
 583                         break;
 584                 }
 585                 xpt_release_bus(bus);
 586                 break;
 587         }
 588         /*
 589          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 590          * with the periphal driver name and unit name filled in.  The other
 591          * fields don't really matter as input.  The passthrough driver name
 592          * ("pass"), and unit number are passed back in the ccb.  The current
 593          * device generation number, and the index into the device peripheral
 594          * driver list, and the status are also passed back.  Note that
 595          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 596          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 597          * (or rather should be) impossible for the device peripheral driver
 598          * list to change since we look at the whole thing in one pass, and
 599          * we do it with lock protection.
 600          *
 601          */
 602         case CAMGETPASSTHRU: {
 603                 union ccb *ccb;
 604                 struct cam_periph *periph;
 605                 struct periph_driver **p_drv;
 606                 char   *name;
 607                 u_int unit;
 608                 int base_periph_found;
 609
 610                 ccb = (union ccb *)addr;
 611                 unit = ccb->cgdl.unit_number;
 612                 name = ccb->cgdl.periph_name;
 613                 base_periph_found = 0;
 614 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 615                 if (ccb->ccb_h.func_code == XPT_SCSI_IO)
 616                         ccb->csio.bio = NULL;
 617 #endif
 618
 619                 /*
 620                  * Sanity check -- make sure we don't get a null peripheral
 621                  * driver name.
 622                  */
 623                 if (*ccb->cgdl.periph_name == '\0') {
 624                         error = EINVAL;
 625                         break;
 626                 }
 627
 628                 /* Keep the list from changing while we traverse it */
 629                 xpt_lock_buses();
 630
 631                 /* first find our driver in the list of drivers */
 632                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 633                         if (strcmp((*p_drv)->driver_name, name) == 0)
 634                                 break;
 635
 636                 if (*p_drv == NULL) {
 637                         xpt_unlock_buses();
 638                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 639                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 640                         *ccb->cgdl.periph_name = '\0';
 641                         ccb->cgdl.unit_number = 0;
 642                         error = ENOENT;
 643                         break;
 644                 }
 645
 646                 /*
 647                  * Run through every peripheral instance of this driver
 648                  * and check to see whether it matches the unit passed
 649                  * in by the user.  If it does, get out of the loops and
 650                  * find the passthrough driver associated with that
 651                  * peripheral driver.
 652                  */
 653                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 654                      periph = TAILQ_NEXT(periph, unit_links)) {
 655                         if (periph->unit_number == unit)
 656                                 break;
 657                 }
 658                 /*
 659                  * If we found the peripheral driver that the user passed
 660                  * in, go through all of the peripheral drivers for that
 661                  * particular device and look for a passthrough driver.
 662                  */
 663                 if (periph != NULL) {
 664                         struct cam_ed *device;
 665                         int i;
 666
 667                         base_periph_found = 1;
 668                         device = periph->path->device;
 669                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 670                              periph != NULL;
 671                              periph = SLIST_NEXT(periph, periph_links), i++) {
 672                                 /*
 673                                  * Check to see whether we have a
 674                                  * passthrough device or not.
 675                                  */
 676                                 if (strcmp(periph->periph_name, "pass") == 0) {
 677                                         /*
 678                                          * Fill in the getdevlist fields.
 679                                          */
 680                                         strlcpy(ccb->cgdl.periph_name,
 681                                                periph->periph_name,
 682                                                sizeof(ccb->cgdl.periph_name));
 683                                         ccb->cgdl.unit_number =
 684                                                 periph->unit_number;
 685                                         if (SLIST_NEXT(periph, periph_links))
 686                                                 ccb->cgdl.status =
 687                                                         CAM_GDEVLIST_MORE_DEVS;
 688                                         else
 689                                                 ccb->cgdl.status =
 690                                                        CAM_GDEVLIST_LAST_DEVICE;
 691                                         ccb->cgdl.generation =
 692                                                 device->generation;
 693                                         ccb->cgdl.index = i;
 694                                         /*
 695                                          * Fill in some CCB header fields
 696                                          * that the user may want.
 697                                          */
 698                                         ccb->ccb_h.path_id =
 699                                                 periph->path->bus->path_id;
 700                                         ccb->ccb_h.target_id =
 701                                                 periph->path->target->target_id;
 702                                         ccb->ccb_h.target_lun =
 703                                                 periph->path->device->lun_id;
 704                                         ccb->ccb_h.status = CAM_REQ_CMP;
 705                                         break;
 706                                 }
 707                         }
 708                 }
 709
 710                 /*
 711                  * If the periph is null here, one of two things has
 712                  * happened.  The first possibility is that we couldn't
 713                  * find the unit number of the particular peripheral driver
 714                  * that the user is asking about.  e.g. the user asks for
 715                  * the passthrough driver for "da11".  We find the list of
 716                  * "da" peripherals all right, but there is no unit 11.
 717                  * The other possibility is that we went through the list
 718                  * of peripheral drivers attached to the device structure,
 719                  * but didn't find one with the name "pass".  Either way,
 720                  * we return ENOENT, since we couldn't find something.
 721                  */
 722                 if (periph == NULL) {
 723                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 724                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 725                         *ccb->cgdl.periph_name = '\0';
 726                         ccb->cgdl.unit_number = 0;
 727                         error = ENOENT;
 728                         /*
 729                          * It is unfortunate that this is even necessary,
 730                          * but there are many, many clueless users out there.
 731                          * If this is true, the user is looking for the
 732                          * passthrough driver, but doesn't have one in his
 733                          * kernel.
 734                          */
 735                         if (base_periph_found == 1) {
 736                                 printf("xptioctl: pass driver is not in the "
 737                                        "kernel\n");
 738                                 printf("xptioctl: put \"device pass\" in "
 739                                        "your kernel config file\n");
 740                         }
 741                 }
 742                 xpt_unlock_buses();
 743                 break;
 744                 }
 745         default:
 746                 error = ENOTTY;
 747                 break;
 748         }
 749
 750         return(error);
 751 }
 752
 753 static int
 754 cam_module_event_handler(module_t mod, int what, void *arg)
 755 {
 756         int error;
 757
 758         switch (what) {
 759         case MOD_LOAD:
 760                 if ((error = xpt_init(NULL)) != 0)
 761                         return (error);
 762                 break;
 763         case MOD_UNLOAD:
 764                 return EBUSY;
 765         default:
 766                 return EOPNOTSUPP;
 767         }
 768
 769         return 0;
 770 }
 771
 772 static struct xpt_proto *
 773 xpt_proto_find(cam_proto proto)
 774 {
 775         struct xpt_proto **pp;
 776
 777         SET_FOREACH(pp, cam_xpt_proto_set) {
 778                 if ((*pp)->proto == proto)
 779                         return *pp;
 780         }
 781
 782         return NULL;
 783 }
 784
 785 static void
 786 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 787 {
 788
 789         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 790                 xpt_free_path(done_ccb->ccb_h.path);
 791                 xpt_free_ccb(done_ccb);
 792         } else {
 793                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 794                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 795         }
 796         xpt_release_boot();
 797 }
 798
 799 /* thread to handle bus rescans */
 800 static void
 801 xpt_scanner_thread(void *dummy)
 802 {
 803         union ccb       *ccb;
 804         struct mtx      *mtx;
 805         struct cam_ed   *device;
 806
 807         xpt_lock_buses();
 808         for (;;) {
 809                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 810                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 811                                "-", 0);
 812                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 813                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 814                         xpt_unlock_buses();
 815
 816                         /*
 817                          * We need to lock the device's mutex which we use as
 818                          * the path mutex. We can't do it directly because the
 819                          * cam_path in the ccb may wind up going away because
 820                          * the path lock may be dropped and the path retired in
 821                          * the completion callback. We do this directly to keep
 822                          * the reference counts in cam_path sane. We also have
 823                          * to copy the device pointer because ccb_h.path may
 824                          * be freed in the callback.
 825                          */
 826                         mtx = xpt_path_mtx(ccb->ccb_h.path);
 827                         device = ccb->ccb_h.path->device;
 828                         xpt_acquire_device(device);
 829                         mtx_lock(mtx);
 830                         xpt_action(ccb);
 831                         mtx_unlock(mtx);
 832                         xpt_release_device(device);
 833
 834                         xpt_lock_buses();
 835                 }
 836         }
 837 }
 838
 839 void
 840 xpt_rescan(union ccb *ccb)
 841 {
 842         struct ccb_hdr *hdr;
 843
 844         /* Prepare request */
 845         if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
 846             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 847                 ccb->ccb_h.func_code = XPT_SCAN_BUS;
 848         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 849             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 850                 ccb->ccb_h.func_code = XPT_SCAN_TGT;
 851         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 852             ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
 853                 ccb->ccb_h.func_code = XPT_SCAN_LUN;
 854         else {
 855                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 856                 xpt_free_path(ccb->ccb_h.path);
 857                 xpt_free_ccb(ccb);
 858                 return;
 859         }
 860         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
 861             ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code,
 862                 xpt_action_name(ccb->ccb_h.func_code)));
 863
 864         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 865         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 866         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 867         /* Don't make duplicate entries for the same paths. */
 868         xpt_lock_buses();
 869         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 870                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 871                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 872                                 wakeup(&xsoftc.ccb_scanq);
 873                                 xpt_unlock_buses();
 874                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 875                                 xpt_free_path(ccb->ccb_h.path);
 876                                 xpt_free_ccb(ccb);
 877                                 return;
 878                         }
 879                 }
 880         }
 881         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 882         xpt_hold_boot_locked();
 883         wakeup(&xsoftc.ccb_scanq);
 884         xpt_unlock_buses();
 885 }
 886
 887 /* Functions accessed by the peripheral drivers */
 888 static int
 889 xpt_init(void *dummy)
 890 {
 891         struct cam_sim *xpt_sim;
 892         struct cam_path *path;
 893         struct cam_devq *devq;
 894         cam_status status;
 895         int error, i;
 896
 897         TAILQ_INIT(&xsoftc.xpt_busses);
 898         TAILQ_INIT(&xsoftc.ccb_scanq);
 899         STAILQ_INIT(&xsoftc.highpowerq);
 900         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 901
 902         mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
 903         xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
 904             taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
 905
 906 #ifdef CAM_BOOT_DELAY
 907         /*
 908          * Override this value at compile time to assist our users
 909          * who don't use loader to boot a kernel.
 910          */
 911         xsoftc.boot_delay = CAM_BOOT_DELAY;
 912 #endif
 913
 914         /*
 915          * The xpt layer is, itself, the equivalent of a SIM.
 916          * Allow 16 ccbs in the ccb pool for it.  This should
 917          * give decent parallelism when we probe buses and
 918          * perform other XPT functions.
 919          */
 920         devq = cam_simq_alloc(16);
 921         xpt_sim = cam_sim_alloc(xptaction,
 922                                 xptpoll,
 923                                 "xpt",
 924                                 /*softc*/NULL,
 925                                 /*unit*/0,
 926                                 /*mtx*/NULL,
 927                                 /*max_dev_transactions*/0,
 928                                 /*max_tagged_dev_transactions*/0,
 929                                 devq);
 930         if (xpt_sim == NULL)
 931                 return (ENOMEM);
 932
 933         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 934                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 935                        " failing attach\n", status);
 936                 return (EINVAL);
 937         }
 938
 939         /*
 940          * Looking at the XPT from the SIM layer, the XPT is
 941          * the equivalent of a peripheral driver.  Allocate
 942          * a peripheral driver entry for us.
 943          */
 944         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 945                                       CAM_TARGET_WILDCARD,
 946                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 947                 printf("xpt_init: xpt_create_path failed with status %#x,"
 948                        " failing attach\n", status);
 949                 return (EINVAL);
 950         }
 951         xpt_path_lock(path);
 952         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 953                          path, NULL, 0, xpt_sim);
 954         xpt_path_unlock(path);
 955         xpt_free_path(path);
 956
 957         if (cam_num_doneqs < 1)
 958                 cam_num_doneqs = 1 + mp_ncpus / 6;
 959         else if (cam_num_doneqs > MAXCPU)
 960                 cam_num_doneqs = MAXCPU;
 961         for (i = 0; i < cam_num_doneqs; i++) {
 962                 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 963                     MTX_DEF);
 964                 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
 965                 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 966                     &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 967                 if (error != 0) {
 968                         cam_num_doneqs = i;
 969                         break;
 970                 }
 971         }
 972         if (cam_num_doneqs < 1) {
 973                 printf("xpt_init: Cannot init completion queues "
 974                        "- failing attach\n");
 975                 return (ENOMEM);
 976         }
 977
 978         mtx_init(&cam_async.cam_doneq_mtx, "CAM async", NULL, MTX_DEF);
 979         STAILQ_INIT(&cam_async.cam_doneq);
 980         if (kproc_kthread_add(xpt_async_td, &cam_async,
 981                 &cam_proc, NULL, 0, 0, "cam", "async") != 0) {
 982                 printf("xpt_init: Cannot init async thread "
 983                        "- failing attach\n");
 984                 return (ENOMEM);
 985         }
 986
 987         /*
 988          * Register a callback for when interrupts are enabled.
 989          */
 990         config_intrhook_oneshot(xpt_config, NULL);
 991
 992         return (0);
 993 }
 994
 995 static cam_status
 996 xptregister(struct cam_periph *periph, void *arg)
 997 {
 998         struct cam_sim *xpt_sim;
 999
1000         if (periph == NULL) {
1001                 printf("xptregister: periph was NULL!!\n");
1002                 return(CAM_REQ_CMP_ERR);
1003         }
1004
1005         xpt_sim = (struct cam_sim *)arg;
1006         xpt_sim->softc = periph;
1007         xpt_periph = periph;
1008         periph->softc = NULL;
1009
1010         return(CAM_REQ_CMP);
1011 }
1012
1013 int32_t
1014 xpt_add_periph(struct cam_periph *periph)
1015 {
1016         struct cam_ed *device;
1017         int32_t  status;
1018
1019         TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
1020         device = periph->path->device;
1021         status = CAM_REQ_CMP;
1022         if (device != NULL) {
1023                 mtx_lock(&device->target->bus->eb_mtx);
1024                 device->generation++;
1025                 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
1026                 mtx_unlock(&device->target->bus->eb_mtx);
1027                 atomic_add_32(&xsoftc.xpt_generation, 1);
1028         }
1029
1030         return (status);
1031 }
1032
1033 void
1034 xpt_remove_periph(struct cam_periph *periph)
1035 {
1036         struct cam_ed *device;
1037
1038         device = periph->path->device;
1039         if (device != NULL) {
1040                 mtx_lock(&device->target->bus->eb_mtx);
1041                 device->generation++;
1042                 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1043                 mtx_unlock(&device->target->bus->eb_mtx);
1044                 atomic_add_32(&xsoftc.xpt_generation, 1);
1045         }
1046 }
1047
1048 void
1049 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1050 {
1051         struct  cam_path *path = periph->path;
1052         struct  xpt_proto *proto;
1053
1054         cam_periph_assert(periph, MA_OWNED);
1055         periph->flags |= CAM_PERIPH_ANNOUNCED;
1056
1057         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1058                periph->periph_name, periph->unit_number,
1059                path->bus->sim->sim_name,
1060                path->bus->sim->unit_number,
1061                path->bus->sim->bus_id,
1062                path->bus->path_id,
1063                path->target->target_id,
1064                (uintmax_t)path->device->lun_id);
1065         printf("%s%d: ", periph->periph_name, periph->unit_number);
1066         proto = xpt_proto_find(path->device->protocol);
1067         if (proto)
1068                 proto->ops->announce(path->device);
1069         else
1070                 printf("%s%d: Unknown protocol device %d\n",
1071                     periph->periph_name, periph->unit_number,
1072                     path->device->protocol);
1073         if (path->device->serial_num_len > 0) {
1074                 /* Don't wrap the screen  - print only the first 60 chars */
1075                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1076                        periph->unit_number, path->device->serial_num);
1077         }
1078         /* Announce transport details. */
1079         path->bus->xport->ops->announce(periph);
1080         /* Announce command queueing. */
1081         if (path->device->inq_flags & SID_CmdQue
1082          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1083                 printf("%s%d: Command Queueing enabled\n",
1084                        periph->periph_name, periph->unit_number);
1085         }
1086         /* Announce caller's details if they've passed in. */
1087         if (announce_string != NULL)
1088                 printf("%s%d: %s\n", periph->periph_name,
1089                        periph->unit_number, announce_string);
1090 }
1091
1092 void
1093 xpt_announce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb,
1094     char *announce_string)
1095 {
1096         struct  cam_path *path = periph->path;
1097         struct  xpt_proto *proto;
1098
1099         cam_periph_assert(periph, MA_OWNED);
1100         periph->flags |= CAM_PERIPH_ANNOUNCED;
1101
1102         /* Fall back to the non-sbuf method if necessary */
1103         if (xsoftc.announce_nosbuf != 0) {
1104                 xpt_announce_periph(periph, announce_string);
1105                 return;
1106         }
1107         proto = xpt_proto_find(path->device->protocol);
1108         if (((proto != NULL) && (proto->ops->announce_sbuf == NULL)) ||
1109             (path->bus->xport->ops->announce_sbuf == NULL)) {
1110                 xpt_announce_periph(periph, announce_string);
1111                 return;
1112         }
1113
1114         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1115             periph->periph_name, periph->unit_number,
1116             path->bus->sim->sim_name,
1117             path->bus->sim->unit_number,
1118             path->bus->sim->bus_id,
1119             path->bus->path_id,
1120             path->target->target_id,
1121             (uintmax_t)path->device->lun_id);
1122         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1123
1124         if (proto)
1125                 proto->ops->announce_sbuf(path->device, sb);
1126         else
1127                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1128                     periph->periph_name, periph->unit_number,
1129                     path->device->protocol);
1130         if (path->device->serial_num_len > 0) {
1131                 /* Don't wrap the screen  - print only the first 60 chars */
1132                 sbuf_printf(sb, "%s%d: Serial Number %.60s\n",
1133                     periph->periph_name, periph->unit_number,
1134                     path->device->serial_num);
1135         }
1136         /* Announce transport details. */
1137         path->bus->xport->ops->announce_sbuf(periph, sb);
1138         /* Announce command queueing. */
1139         if (path->device->inq_flags & SID_CmdQue
1140          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1141                 sbuf_printf(sb, "%s%d: Command Queueing enabled\n",
1142                     periph->periph_name, periph->unit_number);
1143         }
1144         /* Announce caller's details if they've passed in. */
1145         if (announce_string != NULL)
1146                 sbuf_printf(sb, "%s%d: %s\n", periph->periph_name,
1147                     periph->unit_number, announce_string);
1148 }
1149
1150 void
1151 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1152 {
1153         if (quirks != 0) {
1154                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1155                     periph->unit_number, quirks, bit_string);
1156         }
1157 }
1158
1159 void
1160 xpt_announce_quirks_sbuf(struct cam_periph *periph, struct sbuf *sb,
1161                          int quirks, char *bit_string)
1162 {
1163         if (xsoftc.announce_nosbuf != 0) {
1164                 xpt_announce_quirks(periph, quirks, bit_string);
1165                 return;
1166         }
1167
1168         if (quirks != 0) {
1169                 sbuf_printf(sb, "%s%d: quirks=0x%b\n", periph->periph_name,
1170                     periph->unit_number, quirks, bit_string);
1171         }
1172 }
1173
1174 void
1175 xpt_denounce_periph(struct cam_periph *periph)
1176 {
1177         struct  cam_path *path = periph->path;
1178         struct  xpt_proto *proto;
1179
1180         cam_periph_assert(periph, MA_OWNED);
1181         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1182                periph->periph_name, periph->unit_number,
1183                path->bus->sim->sim_name,
1184                path->bus->sim->unit_number,
1185                path->bus->sim->bus_id,
1186                path->bus->path_id,
1187                path->target->target_id,
1188                (uintmax_t)path->device->lun_id);
1189         printf("%s%d: ", periph->periph_name, periph->unit_number);
1190         proto = xpt_proto_find(path->device->protocol);
1191         if (proto)
1192                 proto->ops->denounce(path->device);
1193         else
1194                 printf("%s%d: Unknown protocol device %d\n",
1195                     periph->periph_name, periph->unit_number,
1196                     path->device->protocol);
1197         if (path->device->serial_num_len > 0)
1198                 printf(" s/n %.60s", path->device->serial_num);
1199         printf(" detached\n");
1200 }
1201
1202 void
1203 xpt_denounce_periph_sbuf(struct cam_periph *periph, struct sbuf *sb)
1204 {
1205         struct cam_path *path = periph->path;
1206         struct xpt_proto *proto;
1207
1208         cam_periph_assert(periph, MA_OWNED);
1209
1210         /* Fall back to the non-sbuf method if necessary */
1211         if (xsoftc.announce_nosbuf != 0) {
1212                 xpt_denounce_periph(periph);
1213                 return;
1214         }
1215         proto = xpt_proto_find(path->device->protocol);
1216         if ((proto != NULL) && (proto->ops->denounce_sbuf == NULL)) {
1217                 xpt_denounce_periph(periph);
1218                 return;
1219         }
1220
1221         sbuf_printf(sb, "%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1222             periph->periph_name, periph->unit_number,
1223             path->bus->sim->sim_name,
1224             path->bus->sim->unit_number,
1225             path->bus->sim->bus_id,
1226             path->bus->path_id,
1227             path->target->target_id,
1228             (uintmax_t)path->device->lun_id);
1229         sbuf_printf(sb, "%s%d: ", periph->periph_name, periph->unit_number);
1230
1231         if (proto)
1232                 proto->ops->denounce_sbuf(path->device, sb);
1233         else
1234                 sbuf_printf(sb, "%s%d: Unknown protocol device %d\n",
1235                     periph->periph_name, periph->unit_number,
1236                     path->device->protocol);
1237         if (path->device->serial_num_len > 0)
1238                 sbuf_printf(sb, " s/n %.60s", path->device->serial_num);
1239         sbuf_printf(sb, " detached\n");
1240 }
1241
1242 int
1243 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1244 {
1245         int ret = -1, l, o;
1246         struct ccb_dev_advinfo cdai;
1247         struct scsi_vpd_device_id *did;
1248         struct scsi_vpd_id_descriptor *idd;
1249
1250         xpt_path_assert(path, MA_OWNED);
1251
1252         memset(&cdai, 0, sizeof(cdai));
1253         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1254         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1255         cdai.flags = CDAI_FLAG_NONE;
1256         cdai.bufsiz = len;
1257         cdai.buf = buf;
1258
1259         if (!strcmp(attr, "GEOM::ident"))
1260                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1261         else if (!strcmp(attr, "GEOM::physpath"))
1262                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1263         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1264                  strcmp(attr, "GEOM::lunname") == 0) {
1265                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1266                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1267                 cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT);
1268                 if (cdai.buf == NULL) {
1269                         ret = ENOMEM;
1270                         goto out;
1271                 }
1272         } else
1273                 goto out;
1274
1275         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1276         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1277                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1278         if (cdai.provsiz == 0)
1279                 goto out;
1280         switch(cdai.buftype) {
1281         case CDAI_TYPE_SCSI_DEVID:
1282                 did = (struct scsi_vpd_device_id *)cdai.buf;
1283                 if (strcmp(attr, "GEOM::lunid") == 0) {
1284                         idd = scsi_get_devid(did, cdai.provsiz,
1285                             scsi_devid_is_lun_naa);
1286                         if (idd == NULL)
1287                                 idd = scsi_get_devid(did, cdai.provsiz,
1288                                     scsi_devid_is_lun_eui64);
1289                         if (idd == NULL)
1290                                 idd = scsi_get_devid(did, cdai.provsiz,
1291                                     scsi_devid_is_lun_uuid);
1292                         if (idd == NULL)
1293                                 idd = scsi_get_devid(did, cdai.provsiz,
1294                                     scsi_devid_is_lun_md5);
1295                 } else
1296                         idd = NULL;
1297
1298                 if (idd == NULL)
1299                         idd = scsi_get_devid(did, cdai.provsiz,
1300                             scsi_devid_is_lun_t10);
1301                 if (idd == NULL)
1302                         idd = scsi_get_devid(did, cdai.provsiz,
1303                             scsi_devid_is_lun_name);
1304                 if (idd == NULL)
1305                         break;
1306
1307                 ret = 0;
1308                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) ==
1309                     SVPD_ID_CODESET_ASCII) {
1310                         if (idd->length < len) {
1311                                 for (l = 0; l < idd->length; l++)
1312                                         buf[l] = idd->identifier[l] ?
1313                                             idd->identifier[l] : ' ';
1314                                 buf[l] = 0;
1315                         } else
1316                                 ret = EFAULT;
1317                         break;
1318                 }
1319                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) ==
1320                     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                         break;
1328                 }
1329                 if ((idd->id_type & SVPD_ID_TYPE_MASK) ==
1330                     SVPD_ID_TYPE_UUID && idd->identifier[0] == 0x10) {
1331                         if ((idd->length - 2) * 2 + 4 >= len) {
1332                                 ret = EFAULT;
1333                                 break;
1334                         }
1335                         for (l = 2, o = 0; l < idd->length; l++) {
1336                                 if (l == 6 || l == 8 || l == 10 || l == 12)
1337                                     o += sprintf(buf + o, "-");
1338                                 o += sprintf(buf + o, "%02x",
1339                                     idd->identifier[l]);
1340                         }
1341                         break;
1342                 }
1343                 if (idd->length * 2 < len) {
1344                         for (l = 0; l < idd->length; l++)
1345                                 sprintf(buf + l * 2, "%02x",
1346                                     idd->identifier[l]);
1347                 } else
1348                                 ret = EFAULT;
1349                 break;
1350         default:
1351                 if (cdai.provsiz < len) {
1352                         cdai.buf[cdai.provsiz] = 0;
1353                         ret = 0;
1354                 } else
1355                         ret = EFAULT;
1356                 break;
1357         }
1358
1359 out:
1360         if ((char *)cdai.buf != buf)
1361                 free(cdai.buf, M_CAMXPT);
1362         return ret;
1363 }
1364
1365 static dev_match_ret
1366 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1367             struct cam_eb *bus)
1368 {
1369         dev_match_ret retval;
1370         u_int i;
1371
1372         retval = DM_RET_NONE;
1373
1374         /*
1375          * If we aren't given something to match against, that's an error.
1376          */
1377         if (bus == NULL)
1378                 return(DM_RET_ERROR);
1379
1380         /*
1381          * If there are no match entries, then this bus matches no
1382          * matter what.
1383          */
1384         if ((patterns == NULL) || (num_patterns == 0))
1385                 return(DM_RET_DESCEND | DM_RET_COPY);
1386
1387         for (i = 0; i < num_patterns; i++) {
1388                 struct bus_match_pattern *cur_pattern;
1389
1390                 /*
1391                  * If the pattern in question isn't for a bus node, we
1392                  * aren't interested.  However, we do indicate to the
1393                  * calling routine that we should continue descending the
1394                  * tree, since the user wants to match against lower-level
1395                  * EDT elements.
1396                  */
1397                 if (patterns[i].type != DEV_MATCH_BUS) {
1398                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1399                                 retval |= DM_RET_DESCEND;
1400                         continue;
1401                 }
1402
1403                 cur_pattern = &patterns[i].pattern.bus_pattern;
1404
1405                 /*
1406                  * If they want to match any bus node, we give them any
1407                  * device node.
1408                  */
1409                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1410                         /* set the copy flag */
1411                         retval |= DM_RET_COPY;
1412
1413                         /*
1414                          * If we've already decided on an action, go ahead
1415                          * and return.
1416                          */
1417                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1418                                 return(retval);
1419                 }
1420
1421                 /*
1422                  * Not sure why someone would do this...
1423                  */
1424                 if (cur_pattern->flags == BUS_MATCH_NONE)
1425                         continue;
1426
1427                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1428                  && (cur_pattern->path_id != bus->path_id))
1429                         continue;
1430
1431                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1432                  && (cur_pattern->bus_id != bus->sim->bus_id))
1433                         continue;
1434
1435                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1436                  && (cur_pattern->unit_number != bus->sim->unit_number))
1437                         continue;
1438
1439                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1440                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1441                              DEV_IDLEN) != 0))
1442                         continue;
1443
1444                 /*
1445                  * If we get to this point, the user definitely wants
1446                  * information on this bus.  So tell the caller to copy the
1447                  * data out.
1448                  */
1449                 retval |= DM_RET_COPY;
1450
1451                 /*
1452                  * If the return action has been set to descend, then we
1453                  * know that we've already seen a non-bus matching
1454                  * expression, therefore we need to further descend the tree.
1455                  * This won't change by continuing around the loop, so we
1456                  * go ahead and return.  If we haven't seen a non-bus
1457                  * matching expression, we keep going around the loop until
1458                  * we exhaust the matching expressions.  We'll set the stop
1459                  * flag once we fall out of the loop.
1460                  */
1461                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1462                         return(retval);
1463         }
1464
1465         /*
1466          * If the return action hasn't been set to descend yet, that means
1467          * we haven't seen anything other than bus matching patterns.  So
1468          * tell the caller to stop descending the tree -- the user doesn't
1469          * want to match against lower level tree elements.
1470          */
1471         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1472                 retval |= DM_RET_STOP;
1473
1474         return(retval);
1475 }
1476
1477 static dev_match_ret
1478 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1479                struct cam_ed *device)
1480 {
1481         dev_match_ret retval;
1482         u_int i;
1483
1484         retval = DM_RET_NONE;
1485
1486         /*
1487          * If we aren't given something to match against, that's an error.
1488          */
1489         if (device == NULL)
1490                 return(DM_RET_ERROR);
1491
1492         /*
1493          * If there are no match entries, then this device matches no
1494          * matter what.
1495          */
1496         if ((patterns == NULL) || (num_patterns == 0))
1497                 return(DM_RET_DESCEND | DM_RET_COPY);
1498
1499         for (i = 0; i < num_patterns; i++) {
1500                 struct device_match_pattern *cur_pattern;
1501                 struct scsi_vpd_device_id *device_id_page;
1502
1503                 /*
1504                  * If the pattern in question isn't for a device node, we
1505                  * aren't interested.
1506                  */
1507                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1508                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1509                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1510                                 retval |= DM_RET_DESCEND;
1511                         continue;
1512                 }
1513
1514                 cur_pattern = &patterns[i].pattern.device_pattern;
1515
1516                 /* Error out if mutually exclusive options are specified. */
1517                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1518                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1519                         return(DM_RET_ERROR);
1520
1521                 /*
1522                  * If they want to match any device node, we give them any
1523                  * device node.
1524                  */
1525                 if (cur_pattern->flags == DEV_MATCH_ANY)
1526                         goto copy_dev_node;
1527
1528                 /*
1529                  * Not sure why someone would do this...
1530                  */
1531                 if (cur_pattern->flags == DEV_MATCH_NONE)
1532                         continue;
1533
1534                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1535                  && (cur_pattern->path_id != device->target->bus->path_id))
1536                         continue;
1537
1538                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1539                  && (cur_pattern->target_id != device->target->target_id))
1540                         continue;
1541
1542                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1543                  && (cur_pattern->target_lun != device->lun_id))
1544                         continue;
1545
1546                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1547                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1548                                     (caddr_t)&cur_pattern->data.inq_pat,
1549                                     1, sizeof(cur_pattern->data.inq_pat),
1550                                     scsi_static_inquiry_match) == NULL))
1551                         continue;
1552
1553                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1554                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1555                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1556                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1557                                       device->device_id_len
1558                                     - SVPD_DEVICE_ID_HDR_LEN,
1559                                       cur_pattern->data.devid_pat.id,
1560                                       cur_pattern->data.devid_pat.id_len) != 0))
1561                         continue;
1562
1563 copy_dev_node:
1564                 /*
1565                  * If we get to this point, the user definitely wants
1566                  * information on this device.  So tell the caller to copy
1567                  * the data out.
1568                  */
1569                 retval |= DM_RET_COPY;
1570
1571                 /*
1572                  * If the return action has been set to descend, then we
1573                  * know that we've already seen a peripheral matching
1574                  * expression, therefore we need to further descend the tree.
1575                  * This won't change by continuing around the loop, so we
1576                  * go ahead and return.  If we haven't seen a peripheral
1577                  * matching expression, we keep going around the loop until
1578                  * we exhaust the matching expressions.  We'll set the stop
1579                  * flag once we fall out of the loop.
1580                  */
1581                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1582                         return(retval);
1583         }
1584
1585         /*
1586          * If the return action hasn't been set to descend yet, that means
1587          * we haven't seen any peripheral matching patterns.  So tell the
1588          * caller to stop descending the tree -- the user doesn't want to
1589          * match against lower level tree elements.
1590          */
1591         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1592                 retval |= DM_RET_STOP;
1593
1594         return(retval);
1595 }
1596
1597 /*
1598  * Match a single peripheral against any number of match patterns.
1599  */
1600 static dev_match_ret
1601 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1602                struct cam_periph *periph)
1603 {
1604         dev_match_ret retval;
1605         u_int i;
1606
1607         /*
1608          * If we aren't given something to match against, that's an error.
1609          */
1610         if (periph == NULL)
1611                 return(DM_RET_ERROR);
1612
1613         /*
1614          * If there are no match entries, then this peripheral matches no
1615          * matter what.
1616          */
1617         if ((patterns == NULL) || (num_patterns == 0))
1618                 return(DM_RET_STOP | DM_RET_COPY);
1619
1620         /*
1621          * There aren't any nodes below a peripheral node, so there's no
1622          * reason to descend the tree any further.
1623          */
1624         retval = DM_RET_STOP;
1625
1626         for (i = 0; i < num_patterns; i++) {
1627                 struct periph_match_pattern *cur_pattern;
1628
1629                 /*
1630                  * If the pattern in question isn't for a peripheral, we
1631                  * aren't interested.
1632                  */
1633                 if (patterns[i].type != DEV_MATCH_PERIPH)
1634                         continue;
1635
1636                 cur_pattern = &patterns[i].pattern.periph_pattern;
1637
1638                 /*
1639                  * If they want to match on anything, then we will do so.
1640                  */
1641                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1642                         /* set the copy flag */
1643                         retval |= DM_RET_COPY;
1644
1645                         /*
1646                          * We've already set the return action to stop,
1647                          * since there are no nodes below peripherals in
1648                          * the tree.
1649                          */
1650                         return(retval);
1651                 }
1652
1653                 /*
1654                  * Not sure why someone would do this...
1655                  */
1656                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1657                         continue;
1658
1659                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1660                  && (cur_pattern->path_id != periph->path->bus->path_id))
1661                         continue;
1662
1663                 /*
1664                  * For the target and lun id's, we have to make sure the
1665                  * target and lun pointers aren't NULL.  The xpt peripheral
1666                  * has a wildcard target and device.
1667                  */
1668                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1669                  && ((periph->path->target == NULL)
1670                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1671                         continue;
1672
1673                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1674                  && ((periph->path->device == NULL)
1675                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1676                         continue;
1677
1678                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1679                  && (cur_pattern->unit_number != periph->unit_number))
1680                         continue;
1681
1682                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1683                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1684                              DEV_IDLEN) != 0))
1685                         continue;
1686
1687                 /*
1688                  * If we get to this point, the user definitely wants
1689                  * information on this peripheral.  So tell the caller to
1690                  * copy the data out.
1691                  */
1692                 retval |= DM_RET_COPY;
1693
1694                 /*
1695                  * The return action has already been set to stop, since
1696                  * peripherals don't have any nodes below them in the EDT.
1697                  */
1698                 return(retval);
1699         }
1700
1701         /*
1702          * If we get to this point, the peripheral that was passed in
1703          * doesn't match any of the patterns.
1704          */
1705         return(retval);
1706 }
1707
1708 static int
1709 xptedtbusfunc(struct cam_eb *bus, void *arg)
1710 {
1711         struct ccb_dev_match *cdm;
1712         struct cam_et *target;
1713         dev_match_ret retval;
1714
1715         cdm = (struct ccb_dev_match *)arg;
1716
1717         /*
1718          * If our position is for something deeper in the tree, that means
1719          * that we've already seen this node.  So, we keep going down.
1720          */
1721         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1722          && (cdm->pos.cookie.bus == bus)
1723          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1724          && (cdm->pos.cookie.target != NULL))
1725                 retval = DM_RET_DESCEND;
1726         else
1727                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1728
1729         /*
1730          * If we got an error, bail out of the search.
1731          */
1732         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1733                 cdm->status = CAM_DEV_MATCH_ERROR;
1734                 return(0);
1735         }
1736
1737         /*
1738          * If the copy flag is set, copy this bus out.
1739          */
1740         if (retval & DM_RET_COPY) {
1741                 int spaceleft, j;
1742
1743                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1744                         sizeof(struct dev_match_result));
1745
1746                 /*
1747                  * If we don't have enough space to put in another
1748                  * match result, save our position and tell the
1749                  * user there are more devices to check.
1750                  */
1751                 if (spaceleft < sizeof(struct dev_match_result)) {
1752                         bzero(&cdm->pos, sizeof(cdm->pos));
1753                         cdm->pos.position_type =
1754                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1755
1756                         cdm->pos.cookie.bus = bus;
1757                         cdm->pos.generations[CAM_BUS_GENERATION]=
1758                                 xsoftc.bus_generation;
1759                         cdm->status = CAM_DEV_MATCH_MORE;
1760                         return(0);
1761                 }
1762                 j = cdm->num_matches;
1763                 cdm->num_matches++;
1764                 cdm->matches[j].type = DEV_MATCH_BUS;
1765                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1766                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1767                 cdm->matches[j].result.bus_result.unit_number =
1768                         bus->sim->unit_number;
1769                 strlcpy(cdm->matches[j].result.bus_result.dev_name,
1770                         bus->sim->sim_name,
1771                         sizeof(cdm->matches[j].result.bus_result.dev_name));
1772         }
1773
1774         /*
1775          * If the user is only interested in buses, there's no
1776          * reason to descend to the next level in the tree.
1777          */
1778         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1779                 return(1);
1780
1781         /*
1782          * If there is a target generation recorded, check it to
1783          * make sure the target list hasn't changed.
1784          */
1785         mtx_lock(&bus->eb_mtx);
1786         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1787          && (cdm->pos.cookie.bus == bus)
1788          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1789          && (cdm->pos.cookie.target != NULL)) {
1790                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1791                     bus->generation)) {
1792                         mtx_unlock(&bus->eb_mtx);
1793                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1794                         return (0);
1795                 }
1796                 target = (struct cam_et *)cdm->pos.cookie.target;
1797                 target->refcount++;
1798         } else
1799                 target = NULL;
1800         mtx_unlock(&bus->eb_mtx);
1801
1802         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1803 }
1804
1805 static int
1806 xptedttargetfunc(struct cam_et *target, void *arg)
1807 {
1808         struct ccb_dev_match *cdm;
1809         struct cam_eb *bus;
1810         struct cam_ed *device;
1811
1812         cdm = (struct ccb_dev_match *)arg;
1813         bus = target->bus;
1814
1815         /*
1816          * If there is a device list generation recorded, check it to
1817          * make sure the device list hasn't changed.
1818          */
1819         mtx_lock(&bus->eb_mtx);
1820         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1821          && (cdm->pos.cookie.bus == bus)
1822          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1823          && (cdm->pos.cookie.target == target)
1824          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1825          && (cdm->pos.cookie.device != NULL)) {
1826                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1827                     target->generation) {
1828                         mtx_unlock(&bus->eb_mtx);
1829                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1830                         return(0);
1831                 }
1832                 device = (struct cam_ed *)cdm->pos.cookie.device;
1833                 device->refcount++;
1834         } else
1835                 device = NULL;
1836         mtx_unlock(&bus->eb_mtx);
1837
1838         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1839 }
1840
1841 static int
1842 xptedtdevicefunc(struct cam_ed *device, void *arg)
1843 {
1844         struct cam_eb *bus;
1845         struct cam_periph *periph;
1846         struct ccb_dev_match *cdm;
1847         dev_match_ret retval;
1848
1849         cdm = (struct ccb_dev_match *)arg;
1850         bus = device->target->bus;
1851
1852         /*
1853          * If our position is for something deeper in the tree, that means
1854          * that we've already seen this node.  So, we keep going down.
1855          */
1856         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1857          && (cdm->pos.cookie.device == device)
1858          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1859          && (cdm->pos.cookie.periph != NULL))
1860                 retval = DM_RET_DESCEND;
1861         else
1862                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1863                                         device);
1864
1865         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1866                 cdm->status = CAM_DEV_MATCH_ERROR;
1867                 return(0);
1868         }
1869
1870         /*
1871          * If the copy flag is set, copy this device out.
1872          */
1873         if (retval & DM_RET_COPY) {
1874                 int spaceleft, j;
1875
1876                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1877                         sizeof(struct dev_match_result));
1878
1879                 /*
1880                  * If we don't have enough space to put in another
1881                  * match result, save our position and tell the
1882                  * user there are more devices to check.
1883                  */
1884                 if (spaceleft < sizeof(struct dev_match_result)) {
1885                         bzero(&cdm->pos, sizeof(cdm->pos));
1886                         cdm->pos.position_type =
1887                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1888                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1889
1890                         cdm->pos.cookie.bus = device->target->bus;
1891                         cdm->pos.generations[CAM_BUS_GENERATION]=
1892                                 xsoftc.bus_generation;
1893                         cdm->pos.cookie.target = device->target;
1894                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1895                                 device->target->bus->generation;
1896                         cdm->pos.cookie.device = device;
1897                         cdm->pos.generations[CAM_DEV_GENERATION] =
1898                                 device->target->generation;
1899                         cdm->status = CAM_DEV_MATCH_MORE;
1900                         return(0);
1901                 }
1902                 j = cdm->num_matches;
1903                 cdm->num_matches++;
1904                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1905                 cdm->matches[j].result.device_result.path_id =
1906                         device->target->bus->path_id;
1907                 cdm->matches[j].result.device_result.target_id =
1908                         device->target->target_id;
1909                 cdm->matches[j].result.device_result.target_lun =
1910                         device->lun_id;
1911                 cdm->matches[j].result.device_result.protocol =
1912                         device->protocol;
1913                 bcopy(&device->inq_data,
1914                       &cdm->matches[j].result.device_result.inq_data,
1915                       sizeof(struct scsi_inquiry_data));
1916                 bcopy(&device->ident_data,
1917                       &cdm->matches[j].result.device_result.ident_data,
1918                       sizeof(struct ata_params));
1919
1920                 /* Let the user know whether this device is unconfigured */
1921                 if (device->flags & CAM_DEV_UNCONFIGURED)
1922                         cdm->matches[j].result.device_result.flags =
1923                                 DEV_RESULT_UNCONFIGURED;
1924                 else
1925                         cdm->matches[j].result.device_result.flags =
1926                                 DEV_RESULT_NOFLAG;
1927         }
1928
1929         /*
1930          * If the user isn't interested in peripherals, don't descend
1931          * the tree any further.
1932          */
1933         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1934                 return(1);
1935
1936         /*
1937          * If there is a peripheral list generation recorded, make sure
1938          * it hasn't changed.
1939          */
1940         xpt_lock_buses();
1941         mtx_lock(&bus->eb_mtx);
1942         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1943          && (cdm->pos.cookie.bus == bus)
1944          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1945          && (cdm->pos.cookie.target == device->target)
1946          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1947          && (cdm->pos.cookie.device == device)
1948          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1949          && (cdm->pos.cookie.periph != NULL)) {
1950                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1951                     device->generation) {
1952                         mtx_unlock(&bus->eb_mtx);
1953                         xpt_unlock_buses();
1954                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1955                         return(0);
1956                 }
1957                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1958                 periph->refcount++;
1959         } else
1960                 periph = NULL;
1961         mtx_unlock(&bus->eb_mtx);
1962         xpt_unlock_buses();
1963
1964         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1965 }
1966
1967 static int
1968 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1969 {
1970         struct ccb_dev_match *cdm;
1971         dev_match_ret retval;
1972
1973         cdm = (struct ccb_dev_match *)arg;
1974
1975         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1976
1977         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1978                 cdm->status = CAM_DEV_MATCH_ERROR;
1979                 return(0);
1980         }
1981
1982         /*
1983          * If the copy flag is set, copy this peripheral out.
1984          */
1985         if (retval & DM_RET_COPY) {
1986                 int spaceleft, j;
1987                 size_t l;
1988
1989                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1990                         sizeof(struct dev_match_result));
1991
1992                 /*
1993                  * If we don't have enough space to put in another
1994                  * match result, save our position and tell the
1995                  * user there are more devices to check.
1996                  */
1997                 if (spaceleft < sizeof(struct dev_match_result)) {
1998                         bzero(&cdm->pos, sizeof(cdm->pos));
1999                         cdm->pos.position_type =
2000                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2001                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
2002                                 CAM_DEV_POS_PERIPH;
2003
2004                         cdm->pos.cookie.bus = periph->path->bus;
2005                         cdm->pos.generations[CAM_BUS_GENERATION]=
2006                                 xsoftc.bus_generation;
2007                         cdm->pos.cookie.target = periph->path->target;
2008                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2009                                 periph->path->bus->generation;
2010                         cdm->pos.cookie.device = periph->path->device;
2011                         cdm->pos.generations[CAM_DEV_GENERATION] =
2012                                 periph->path->target->generation;
2013                         cdm->pos.cookie.periph = periph;
2014                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2015                                 periph->path->device->generation;
2016                         cdm->status = CAM_DEV_MATCH_MORE;
2017                         return(0);
2018                 }
2019
2020                 j = cdm->num_matches;
2021                 cdm->num_matches++;
2022                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2023                 cdm->matches[j].result.periph_result.path_id =
2024                         periph->path->bus->path_id;
2025                 cdm->matches[j].result.periph_result.target_id =
2026                         periph->path->target->target_id;
2027                 cdm->matches[j].result.periph_result.target_lun =
2028                         periph->path->device->lun_id;
2029                 cdm->matches[j].result.periph_result.unit_number =
2030                         periph->unit_number;
2031                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2032                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2033                         periph->periph_name, l);
2034         }
2035
2036         return(1);
2037 }
2038
2039 static int
2040 xptedtmatch(struct ccb_dev_match *cdm)
2041 {
2042         struct cam_eb *bus;
2043         int ret;
2044
2045         cdm->num_matches = 0;
2046
2047         /*
2048          * Check the bus list generation.  If it has changed, the user
2049          * needs to reset everything and start over.
2050          */
2051         xpt_lock_buses();
2052         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2053          && (cdm->pos.cookie.bus != NULL)) {
2054                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
2055                     xsoftc.bus_generation) {
2056                         xpt_unlock_buses();
2057                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2058                         return(0);
2059                 }
2060                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
2061                 bus->refcount++;
2062         } else
2063                 bus = NULL;
2064         xpt_unlock_buses();
2065
2066         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
2067
2068         /*
2069          * If we get back 0, that means that we had to stop before fully
2070          * traversing the EDT.  It also means that one of the subroutines
2071          * has set the status field to the proper value.  If we get back 1,
2072          * we've fully traversed the EDT and copied out any matching entries.
2073          */
2074         if (ret == 1)
2075                 cdm->status = CAM_DEV_MATCH_LAST;
2076
2077         return(ret);
2078 }
2079
2080 static int
2081 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2082 {
2083         struct cam_periph *periph;
2084         struct ccb_dev_match *cdm;
2085
2086         cdm = (struct ccb_dev_match *)arg;
2087
2088         xpt_lock_buses();
2089         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2090          && (cdm->pos.cookie.pdrv == pdrv)
2091          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2092          && (cdm->pos.cookie.periph != NULL)) {
2093                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2094                     (*pdrv)->generation) {
2095                         xpt_unlock_buses();
2096                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2097                         return(0);
2098                 }
2099                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
2100                 periph->refcount++;
2101         } else
2102                 periph = NULL;
2103         xpt_unlock_buses();
2104
2105         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
2106 }
2107
2108 static int
2109 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2110 {
2111         struct ccb_dev_match *cdm;
2112         dev_match_ret retval;
2113
2114         cdm = (struct ccb_dev_match *)arg;
2115
2116         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2117
2118         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2119                 cdm->status = CAM_DEV_MATCH_ERROR;
2120                 return(0);
2121         }
2122
2123         /*
2124          * If the copy flag is set, copy this peripheral out.
2125          */
2126         if (retval & DM_RET_COPY) {
2127                 int spaceleft, j;
2128                 size_t l;
2129
2130                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2131                         sizeof(struct dev_match_result));
2132
2133                 /*
2134                  * If we don't have enough space to put in another
2135                  * match result, save our position and tell the
2136                  * user there are more devices to check.
2137                  */
2138                 if (spaceleft < sizeof(struct dev_match_result)) {
2139                         struct periph_driver **pdrv;
2140
2141                         pdrv = NULL;
2142                         bzero(&cdm->pos, sizeof(cdm->pos));
2143                         cdm->pos.position_type =
2144                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2145                                 CAM_DEV_POS_PERIPH;
2146
2147                         /*
2148                          * This may look a bit non-sensical, but it is
2149                          * actually quite logical.  There are very few
2150                          * peripheral drivers, and bloating every peripheral
2151                          * structure with a pointer back to its parent
2152                          * peripheral driver linker set entry would cost
2153                          * more in the long run than doing this quick lookup.
2154                          */
2155                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2156                                 if (strcmp((*pdrv)->driver_name,
2157                                     periph->periph_name) == 0)
2158                                         break;
2159                         }
2160
2161                         if (*pdrv == NULL) {
2162                                 cdm->status = CAM_DEV_MATCH_ERROR;
2163                                 return(0);
2164                         }
2165
2166                         cdm->pos.cookie.pdrv = pdrv;
2167                         /*
2168                          * The periph generation slot does double duty, as
2169                          * does the periph pointer slot.  They are used for
2170                          * both edt and pdrv lookups and positioning.
2171                          */
2172                         cdm->pos.cookie.periph = periph;
2173                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2174                                 (*pdrv)->generation;
2175                         cdm->status = CAM_DEV_MATCH_MORE;
2176                         return(0);
2177                 }
2178
2179                 j = cdm->num_matches;
2180                 cdm->num_matches++;
2181                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2182                 cdm->matches[j].result.periph_result.path_id =
2183                         periph->path->bus->path_id;
2184
2185                 /*
2186                  * The transport layer peripheral doesn't have a target or
2187                  * lun.
2188                  */
2189                 if (periph->path->target)
2190                         cdm->matches[j].result.periph_result.target_id =
2191                                 periph->path->target->target_id;
2192                 else
2193                         cdm->matches[j].result.periph_result.target_id =
2194                                 CAM_TARGET_WILDCARD;
2195
2196                 if (periph->path->device)
2197                         cdm->matches[j].result.periph_result.target_lun =
2198                                 periph->path->device->lun_id;
2199                 else
2200                         cdm->matches[j].result.periph_result.target_lun =
2201                                 CAM_LUN_WILDCARD;
2202
2203                 cdm->matches[j].result.periph_result.unit_number =
2204                         periph->unit_number;
2205                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2206                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2207                         periph->periph_name, l);
2208         }
2209
2210         return(1);
2211 }
2212
2213 static int
2214 xptperiphlistmatch(struct ccb_dev_match *cdm)
2215 {
2216         int ret;
2217
2218         cdm->num_matches = 0;
2219
2220         /*
2221          * At this point in the edt traversal function, we check the bus
2222          * list generation to make sure that no buses have been added or
2223          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2224          * For the peripheral driver list traversal function, however, we
2225          * don't have to worry about new peripheral driver types coming or
2226          * going; they're in a linker set, and therefore can't change
2227          * without a recompile.
2228          */
2229
2230         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2231          && (cdm->pos.cookie.pdrv != NULL))
2232                 ret = xptpdrvtraverse(
2233                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2234                                 xptplistpdrvfunc, cdm);
2235         else
2236                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2237
2238         /*
2239          * If we get back 0, that means that we had to stop before fully
2240          * traversing the peripheral driver tree.  It also means that one of
2241          * the subroutines has set the status field to the proper value.  If
2242          * we get back 1, we've fully traversed the EDT and copied out any
2243          * matching entries.
2244          */
2245         if (ret == 1)
2246                 cdm->status = CAM_DEV_MATCH_LAST;
2247
2248         return(ret);
2249 }
2250
2251 static int
2252 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2253 {
2254         struct cam_eb *bus, *next_bus;
2255         int retval;
2256
2257         retval = 1;
2258         if (start_bus)
2259                 bus = start_bus;
2260         else {
2261                 xpt_lock_buses();
2262                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2263                 if (bus == NULL) {
2264                         xpt_unlock_buses();
2265                         return (retval);
2266                 }
2267                 bus->refcount++;
2268                 xpt_unlock_buses();
2269         }
2270         for (; bus != NULL; bus = next_bus) {
2271                 retval = tr_func(bus, arg);
2272                 if (retval == 0) {
2273                         xpt_release_bus(bus);
2274                         break;
2275                 }
2276                 xpt_lock_buses();
2277                 next_bus = TAILQ_NEXT(bus, links);
2278                 if (next_bus)
2279                         next_bus->refcount++;
2280                 xpt_unlock_buses();
2281                 xpt_release_bus(bus);
2282         }
2283         return(retval);
2284 }
2285
2286 static int
2287 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2288                   xpt_targetfunc_t *tr_func, void *arg)
2289 {
2290         struct cam_et *target, *next_target;
2291         int retval;
2292
2293         retval = 1;
2294         if (start_target)
2295                 target = start_target;
2296         else {
2297                 mtx_lock(&bus->eb_mtx);
2298                 target = TAILQ_FIRST(&bus->et_entries);
2299                 if (target == NULL) {
2300                         mtx_unlock(&bus->eb_mtx);
2301                         return (retval);
2302                 }
2303                 target->refcount++;
2304                 mtx_unlock(&bus->eb_mtx);
2305         }
2306         for (; target != NULL; target = next_target) {
2307                 retval = tr_func(target, arg);
2308                 if (retval == 0) {
2309                         xpt_release_target(target);
2310                         break;
2311                 }
2312                 mtx_lock(&bus->eb_mtx);
2313                 next_target = TAILQ_NEXT(target, links);
2314                 if (next_target)
2315                         next_target->refcount++;
2316                 mtx_unlock(&bus->eb_mtx);
2317                 xpt_release_target(target);
2318         }
2319         return(retval);
2320 }
2321
2322 static int
2323 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2324                   xpt_devicefunc_t *tr_func, void *arg)
2325 {
2326         struct cam_eb *bus;
2327         struct cam_ed *device, *next_device;
2328         int retval;
2329
2330         retval = 1;
2331         bus = target->bus;
2332         if (start_device)
2333                 device = start_device;
2334         else {
2335                 mtx_lock(&bus->eb_mtx);
2336                 device = TAILQ_FIRST(&target->ed_entries);
2337                 if (device == NULL) {
2338                         mtx_unlock(&bus->eb_mtx);
2339                         return (retval);
2340                 }
2341                 device->refcount++;
2342                 mtx_unlock(&bus->eb_mtx);
2343         }
2344         for (; device != NULL; device = next_device) {
2345                 mtx_lock(&device->device_mtx);
2346                 retval = tr_func(device, arg);
2347                 mtx_unlock(&device->device_mtx);
2348                 if (retval == 0) {
2349                         xpt_release_device(device);
2350                         break;
2351                 }
2352                 mtx_lock(&bus->eb_mtx);
2353                 next_device = TAILQ_NEXT(device, links);
2354                 if (next_device)
2355                         next_device->refcount++;
2356                 mtx_unlock(&bus->eb_mtx);
2357                 xpt_release_device(device);
2358         }
2359         return(retval);
2360 }
2361
2362 static int
2363 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2364                   xpt_periphfunc_t *tr_func, void *arg)
2365 {
2366         struct cam_eb *bus;
2367         struct cam_periph *periph, *next_periph;
2368         int retval;
2369
2370         retval = 1;
2371
2372         bus = device->target->bus;
2373         if (start_periph)
2374                 periph = start_periph;
2375         else {
2376                 xpt_lock_buses();
2377                 mtx_lock(&bus->eb_mtx);
2378                 periph = SLIST_FIRST(&device->periphs);
2379                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2380                         periph = SLIST_NEXT(periph, periph_links);
2381                 if (periph == NULL) {
2382                         mtx_unlock(&bus->eb_mtx);
2383                         xpt_unlock_buses();
2384                         return (retval);
2385                 }
2386                 periph->refcount++;
2387                 mtx_unlock(&bus->eb_mtx);
2388                 xpt_unlock_buses();
2389         }
2390         for (; periph != NULL; periph = next_periph) {
2391                 retval = tr_func(periph, arg);
2392                 if (retval == 0) {
2393                         cam_periph_release_locked(periph);
2394                         break;
2395                 }
2396                 xpt_lock_buses();
2397                 mtx_lock(&bus->eb_mtx);
2398                 next_periph = SLIST_NEXT(periph, periph_links);
2399                 while (next_periph != NULL &&
2400                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2401                         next_periph = SLIST_NEXT(next_periph, periph_links);
2402                 if (next_periph)
2403                         next_periph->refcount++;
2404                 mtx_unlock(&bus->eb_mtx);
2405                 xpt_unlock_buses();
2406                 cam_periph_release_locked(periph);
2407         }
2408         return(retval);
2409 }
2410
2411 static int
2412 xptpdrvtraverse(struct periph_driver **start_pdrv,
2413                 xpt_pdrvfunc_t *tr_func, void *arg)
2414 {
2415         struct periph_driver **pdrv;
2416         int retval;
2417
2418         retval = 1;
2419
2420         /*
2421          * We don't traverse the peripheral driver list like we do the
2422          * other lists, because it is a linker set, and therefore cannot be
2423          * changed during runtime.  If the peripheral driver list is ever
2424          * re-done to be something other than a linker set (i.e. it can
2425          * change while the system is running), the list traversal should
2426          * be modified to work like the other traversal functions.
2427          */
2428         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2429              *pdrv != NULL; pdrv++) {
2430                 retval = tr_func(pdrv, arg);
2431
2432                 if (retval == 0)
2433                         return(retval);
2434         }
2435
2436         return(retval);
2437 }
2438
2439 static int
2440 xptpdperiphtraverse(struct periph_driver **pdrv,
2441                     struct cam_periph *start_periph,
2442                     xpt_periphfunc_t *tr_func, void *arg)
2443 {
2444         struct cam_periph *periph, *next_periph;
2445         int retval;
2446
2447         retval = 1;
2448
2449         if (start_periph)
2450                 periph = start_periph;
2451         else {
2452                 xpt_lock_buses();
2453                 periph = TAILQ_FIRST(&(*pdrv)->units);
2454                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2455                         periph = TAILQ_NEXT(periph, unit_links);
2456                 if (periph == NULL) {
2457                         xpt_unlock_buses();
2458                         return (retval);
2459                 }
2460                 periph->refcount++;
2461                 xpt_unlock_buses();
2462         }
2463         for (; periph != NULL; periph = next_periph) {
2464                 cam_periph_lock(periph);
2465                 retval = tr_func(periph, arg);
2466                 cam_periph_unlock(periph);
2467                 if (retval == 0) {
2468                         cam_periph_release(periph);
2469                         break;
2470                 }
2471                 xpt_lock_buses();
2472                 next_periph = TAILQ_NEXT(periph, unit_links);
2473                 while (next_periph != NULL &&
2474                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2475                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2476                 if (next_periph)
2477                         next_periph->refcount++;
2478                 xpt_unlock_buses();
2479                 cam_periph_release(periph);
2480         }
2481         return(retval);
2482 }
2483
2484 static int
2485 xptdefbusfunc(struct cam_eb *bus, void *arg)
2486 {
2487         struct xpt_traverse_config *tr_config;
2488
2489         tr_config = (struct xpt_traverse_config *)arg;
2490
2491         if (tr_config->depth == XPT_DEPTH_BUS) {
2492                 xpt_busfunc_t *tr_func;
2493
2494                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2495
2496                 return(tr_func(bus, tr_config->tr_arg));
2497         } else
2498                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2499 }
2500
2501 static int
2502 xptdeftargetfunc(struct cam_et *target, void *arg)
2503 {
2504         struct xpt_traverse_config *tr_config;
2505
2506         tr_config = (struct xpt_traverse_config *)arg;
2507
2508         if (tr_config->depth == XPT_DEPTH_TARGET) {
2509                 xpt_targetfunc_t *tr_func;
2510
2511                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2512
2513                 return(tr_func(target, tr_config->tr_arg));
2514         } else
2515                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2516 }
2517
2518 static int
2519 xptdefdevicefunc(struct cam_ed *device, void *arg)
2520 {
2521         struct xpt_traverse_config *tr_config;
2522
2523         tr_config = (struct xpt_traverse_config *)arg;
2524
2525         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2526                 xpt_devicefunc_t *tr_func;
2527
2528                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2529
2530                 return(tr_func(device, tr_config->tr_arg));
2531         } else
2532                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2533 }
2534
2535 static int
2536 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2537 {
2538         struct xpt_traverse_config *tr_config;
2539         xpt_periphfunc_t *tr_func;
2540
2541         tr_config = (struct xpt_traverse_config *)arg;
2542
2543         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2544
2545         /*
2546          * Unlike the other default functions, we don't check for depth
2547          * here.  The peripheral driver level is the last level in the EDT,
2548          * so if we're here, we should execute the function in question.
2549          */
2550         return(tr_func(periph, tr_config->tr_arg));
2551 }
2552
2553 /*
2554  * Execute the given function for every bus in the EDT.
2555  */
2556 static int
2557 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2558 {
2559         struct xpt_traverse_config tr_config;
2560
2561         tr_config.depth = XPT_DEPTH_BUS;
2562         tr_config.tr_func = tr_func;
2563         tr_config.tr_arg = arg;
2564
2565         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2566 }
2567
2568 /*
2569  * Execute the given function for every device in the EDT.
2570  */
2571 static int
2572 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2573 {
2574         struct xpt_traverse_config tr_config;
2575
2576         tr_config.depth = XPT_DEPTH_DEVICE;
2577         tr_config.tr_func = tr_func;
2578         tr_config.tr_arg = arg;
2579
2580         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2581 }
2582
2583 static int
2584 xptsetasyncfunc(struct cam_ed *device, void *arg)
2585 {
2586         struct cam_path path;
2587         struct ccb_getdev cgd;
2588         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2589
2590         /*
2591          * Don't report unconfigured devices (Wildcard devs,
2592          * devices only for target mode, device instances
2593          * that have been invalidated but are waiting for
2594          * their last reference count to be released).
2595          */
2596         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2597                 return (1);
2598
2599         memset(&cgd, 0, sizeof(cgd));
2600         xpt_compile_path(&path,
2601                          NULL,
2602                          device->target->bus->path_id,
2603                          device->target->target_id,
2604                          device->lun_id);
2605         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2606         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2607         xpt_action((union ccb *)&cgd);
2608         csa->callback(csa->callback_arg,
2609                             AC_FOUND_DEVICE,
2610                             &path, &cgd);
2611         xpt_release_path(&path);
2612
2613         return(1);
2614 }
2615
2616 static int
2617 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2618 {
2619         struct cam_path path;
2620         struct ccb_pathinq cpi;
2621         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2622
2623         xpt_compile_path(&path, /*periph*/NULL,
2624                          bus->path_id,
2625                          CAM_TARGET_WILDCARD,
2626                          CAM_LUN_WILDCARD);
2627         xpt_path_lock(&path);
2628         xpt_path_inq(&cpi, &path);
2629         csa->callback(csa->callback_arg,
2630                             AC_PATH_REGISTERED,
2631                             &path, &cpi);
2632         xpt_path_unlock(&path);
2633         xpt_release_path(&path);
2634
2635         return(1);
2636 }
2637
2638 void
2639 xpt_action(union ccb *start_ccb)
2640 {
2641
2642         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2643             ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2644                 xpt_action_name(start_ccb->ccb_h.func_code)));
2645
2646         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2647         (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb);
2648 }
2649
2650 void
2651 xpt_action_default(union ccb *start_ccb)
2652 {
2653         struct cam_path *path;
2654         struct cam_sim *sim;
2655         struct mtx *mtx;
2656
2657         path = start_ccb->ccb_h.path;
2658         CAM_DEBUG(path, CAM_DEBUG_TRACE,
2659             ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2660                 xpt_action_name(start_ccb->ccb_h.func_code)));
2661
2662         switch (start_ccb->ccb_h.func_code) {
2663         case XPT_SCSI_IO:
2664         {
2665                 struct cam_ed *device;
2666
2667                 /*
2668                  * For the sake of compatibility with SCSI-1
2669                  * devices that may not understand the identify
2670                  * message, we include lun information in the
2671                  * second byte of all commands.  SCSI-1 specifies
2672                  * that luns are a 3 bit value and reserves only 3
2673                  * bits for lun information in the CDB.  Later
2674                  * revisions of the SCSI spec allow for more than 8
2675                  * luns, but have deprecated lun information in the
2676                  * CDB.  So, if the lun won't fit, we must omit.
2677                  *
2678                  * Also be aware that during initial probing for devices,
2679                  * the inquiry information is unknown but initialized to 0.
2680                  * This means that this code will be exercised while probing
2681                  * devices with an ANSI revision greater than 2.
2682                  */
2683                 device = path->device;
2684                 if (device->protocol_version <= SCSI_REV_2
2685                  && start_ccb->ccb_h.target_lun < 8
2686                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2687                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2688                             start_ccb->ccb_h.target_lun << 5;
2689                 }
2690                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2691         }
2692         /* FALLTHROUGH */
2693         case XPT_TARGET_IO:
2694         case XPT_CONT_TARGET_IO:
2695                 start_ccb->csio.sense_resid = 0;
2696                 start_ccb->csio.resid = 0;
2697                 /* FALLTHROUGH */
2698         case XPT_ATA_IO:
2699                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2700                         start_ccb->ataio.resid = 0;
2701                 /* FALLTHROUGH */
2702         case XPT_NVME_IO:
2703         case XPT_NVME_ADMIN:
2704         case XPT_MMC_IO:
2705         case XPT_MMC_GET_TRAN_SETTINGS:
2706         case XPT_MMC_SET_TRAN_SETTINGS:
2707         case XPT_RESET_DEV:
2708         case XPT_ENG_EXEC:
2709         case XPT_SMP_IO:
2710         {
2711                 struct cam_devq *devq;
2712
2713                 devq = path->bus->sim->devq;
2714                 mtx_lock(&devq->send_mtx);
2715                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2716                 if (xpt_schedule_devq(devq, path->device) != 0)
2717                         xpt_run_devq(devq);
2718                 mtx_unlock(&devq->send_mtx);
2719                 break;
2720         }
2721         case XPT_CALC_GEOMETRY:
2722                 /* Filter out garbage */
2723                 if (start_ccb->ccg.block_size == 0
2724                  || start_ccb->ccg.volume_size == 0) {
2725                         start_ccb->ccg.cylinders = 0;
2726                         start_ccb->ccg.heads = 0;
2727                         start_ccb->ccg.secs_per_track = 0;
2728                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2729                         break;
2730                 }
2731                 goto call_sim;
2732         case XPT_ABORT:
2733         {
2734                 union ccb* abort_ccb;
2735
2736                 abort_ccb = start_ccb->cab.abort_ccb;
2737                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2738                         struct cam_ed *device;
2739                         struct cam_devq *devq;
2740
2741                         device = abort_ccb->ccb_h.path->device;
2742                         devq = device->sim->devq;
2743
2744                         mtx_lock(&devq->send_mtx);
2745                         if (abort_ccb->ccb_h.pinfo.index > 0) {
2746                                 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb);
2747                                 abort_ccb->ccb_h.status =
2748                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2749                                 xpt_freeze_devq_device(device, 1);
2750                                 mtx_unlock(&devq->send_mtx);
2751                                 xpt_done(abort_ccb);
2752                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2753                                 break;
2754                         }
2755                         mtx_unlock(&devq->send_mtx);
2756
2757                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2758                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2759                                 /*
2760                                  * We've caught this ccb en route to
2761                                  * the SIM.  Flag it for abort and the
2762                                  * SIM will do so just before starting
2763                                  * real work on the CCB.
2764                                  */
2765                                 abort_ccb->ccb_h.status =
2766                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2767                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2768                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2769                                 break;
2770                         }
2771                 }
2772                 if (XPT_FC_IS_QUEUED(abort_ccb)
2773                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2774                         /*
2775                          * It's already completed but waiting
2776                          * for our SWI to get to it.
2777                          */
2778                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2779                         break;
2780                 }
2781                 /*
2782                  * If we weren't able to take care of the abort request
2783                  * in the XPT, pass the request down to the SIM for processing.
2784                  */
2785         }
2786         /* FALLTHROUGH */
2787         case XPT_ACCEPT_TARGET_IO:
2788         case XPT_EN_LUN:
2789         case XPT_IMMED_NOTIFY:
2790         case XPT_NOTIFY_ACK:
2791         case XPT_RESET_BUS:
2792         case XPT_IMMEDIATE_NOTIFY:
2793         case XPT_NOTIFY_ACKNOWLEDGE:
2794         case XPT_GET_SIM_KNOB_OLD:
2795         case XPT_GET_SIM_KNOB:
2796         case XPT_SET_SIM_KNOB:
2797         case XPT_GET_TRAN_SETTINGS:
2798         case XPT_SET_TRAN_SETTINGS:
2799         case XPT_PATH_INQ:
2800 call_sim:
2801                 sim = path->bus->sim;
2802                 mtx = sim->mtx;
2803                 if (mtx && !mtx_owned(mtx))
2804                         mtx_lock(mtx);
2805                 else
2806                         mtx = NULL;
2807
2808                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2809                     ("Calling sim->sim_action(): func=%#x\n", start_ccb->ccb_h.func_code));
2810                 (*(sim->sim_action))(sim, start_ccb);
2811                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2812                     ("sim->sim_action returned: status=%#x\n", start_ccb->ccb_h.status));
2813                 if (mtx)
2814                         mtx_unlock(mtx);
2815                 break;
2816         case XPT_PATH_STATS:
2817                 start_ccb->cpis.last_reset = path->bus->last_reset;
2818                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2819                 break;
2820         case XPT_GDEV_TYPE:
2821         {
2822                 struct cam_ed *dev;
2823
2824                 dev = path->device;
2825                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2826                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2827                 } else {
2828                         struct ccb_getdev *cgd;
2829
2830                         cgd = &start_ccb->cgd;
2831                         cgd->protocol = dev->protocol;
2832                         cgd->inq_data = dev->inq_data;
2833                         cgd->ident_data = dev->ident_data;
2834                         cgd->inq_flags = dev->inq_flags;
2835                         cgd->ccb_h.status = CAM_REQ_CMP;
2836                         cgd->serial_num_len = dev->serial_num_len;
2837                         if ((dev->serial_num_len > 0)
2838                          && (dev->serial_num != NULL))
2839                                 bcopy(dev->serial_num, cgd->serial_num,
2840                                       dev->serial_num_len);
2841                 }
2842                 break;
2843         }
2844         case XPT_GDEV_STATS:
2845         {
2846                 struct ccb_getdevstats *cgds = &start_ccb->cgds;
2847                 struct cam_ed *dev = path->device;
2848                 struct cam_eb *bus = path->bus;
2849                 struct cam_et *tar = path->target;
2850                 struct cam_devq *devq = bus->sim->devq;
2851
2852                 mtx_lock(&devq->send_mtx);
2853                 cgds->dev_openings = dev->ccbq.dev_openings;
2854                 cgds->dev_active = dev->ccbq.dev_active;
2855                 cgds->allocated = dev->ccbq.allocated;
2856                 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2857                 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued;
2858                 cgds->last_reset = tar->last_reset;
2859                 cgds->maxtags = dev->maxtags;
2860                 cgds->mintags = dev->mintags;
2861                 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2862                         cgds->last_reset = bus->last_reset;
2863                 mtx_unlock(&devq->send_mtx);
2864                 cgds->ccb_h.status = CAM_REQ_CMP;
2865                 break;
2866         }
2867         case XPT_GDEVLIST:
2868         {
2869                 struct cam_periph       *nperiph;
2870                 struct periph_list      *periph_head;
2871                 struct ccb_getdevlist   *cgdl;
2872                 u_int                   i;
2873                 struct cam_ed           *device;
2874                 int                     found;
2875
2876                 found = 0;
2877
2878                 /*
2879                  * Don't want anyone mucking with our data.
2880                  */
2881                 device = path->device;
2882                 periph_head = &device->periphs;
2883                 cgdl = &start_ccb->cgdl;
2884
2885                 /*
2886                  * Check and see if the list has changed since the user
2887                  * last requested a list member.  If so, tell them that the
2888                  * list has changed, and therefore they need to start over
2889                  * from the beginning.
2890                  */
2891                 if ((cgdl->index != 0) &&
2892                     (cgdl->generation != device->generation)) {
2893                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2894                         break;
2895                 }
2896
2897                 /*
2898                  * Traverse the list of peripherals and attempt to find
2899                  * the requested peripheral.
2900                  */
2901                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2902                      (nperiph != NULL) && (i <= cgdl->index);
2903                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2904                         if (i == cgdl->index) {
2905                                 strlcpy(cgdl->periph_name,
2906                                         nperiph->periph_name,
2907                                         sizeof(cgdl->periph_name));
2908                                 cgdl->unit_number = nperiph->unit_number;
2909                                 found = 1;
2910                         }
2911                 }
2912                 if (found == 0) {
2913                         cgdl->status = CAM_GDEVLIST_ERROR;
2914                         break;
2915                 }
2916
2917                 if (nperiph == NULL)
2918                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2919                 else
2920                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2921
2922                 cgdl->index++;
2923                 cgdl->generation = device->generation;
2924
2925                 cgdl->ccb_h.status = CAM_REQ_CMP;
2926                 break;
2927         }
2928         case XPT_DEV_MATCH:
2929         {
2930                 dev_pos_type position_type;
2931                 struct ccb_dev_match *cdm;
2932
2933                 cdm = &start_ccb->cdm;
2934
2935                 /*
2936                  * There are two ways of getting at information in the EDT.
2937                  * The first way is via the primary EDT tree.  It starts
2938                  * with a list of buses, then a list of targets on a bus,
2939                  * then devices/luns on a target, and then peripherals on a
2940                  * device/lun.  The "other" way is by the peripheral driver
2941                  * lists.  The peripheral driver lists are organized by
2942                  * peripheral driver.  (obviously)  So it makes sense to
2943                  * use the peripheral driver list if the user is looking
2944                  * for something like "da1", or all "da" devices.  If the
2945                  * user is looking for something on a particular bus/target
2946                  * or lun, it's generally better to go through the EDT tree.
2947                  */
2948
2949                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2950                         position_type = cdm->pos.position_type;
2951                 else {
2952                         u_int i;
2953
2954                         position_type = CAM_DEV_POS_NONE;
2955
2956                         for (i = 0; i < cdm->num_patterns; i++) {
2957                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2958                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2959                                         position_type = CAM_DEV_POS_EDT;
2960                                         break;
2961                                 }
2962                         }
2963
2964                         if (cdm->num_patterns == 0)
2965                                 position_type = CAM_DEV_POS_EDT;
2966                         else if (position_type == CAM_DEV_POS_NONE)
2967                                 position_type = CAM_DEV_POS_PDRV;
2968                 }
2969
2970                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2971                 case CAM_DEV_POS_EDT:
2972                         xptedtmatch(cdm);
2973                         break;
2974                 case CAM_DEV_POS_PDRV:
2975                         xptperiphlistmatch(cdm);
2976                         break;
2977                 default:
2978                         cdm->status = CAM_DEV_MATCH_ERROR;
2979                         break;
2980                 }
2981
2982                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2983                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2984                 else
2985                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2986
2987                 break;
2988         }
2989         case XPT_SASYNC_CB:
2990         {
2991                 struct ccb_setasync *csa;
2992                 struct async_node *cur_entry;
2993                 struct async_list *async_head;
2994                 u_int32_t added;
2995
2996                 csa = &start_ccb->csa;
2997                 added = csa->event_enable;
2998                 async_head = &path->device->asyncs;
2999
3000                 /*
3001                  * If there is already an entry for us, simply
3002                  * update it.
3003                  */
3004                 cur_entry = SLIST_FIRST(async_head);
3005                 while (cur_entry != NULL) {
3006                         if ((cur_entry->callback_arg == csa->callback_arg)
3007                          && (cur_entry->callback == csa->callback))
3008                                 break;
3009                         cur_entry = SLIST_NEXT(cur_entry, links);
3010                 }
3011
3012                 if (cur_entry != NULL) {
3013                         /*
3014                          * If the request has no flags set,
3015                          * remove the entry.
3016                          */
3017                         added &= ~cur_entry->event_enable;
3018                         if (csa->event_enable == 0) {
3019                                 SLIST_REMOVE(async_head, cur_entry,
3020                                              async_node, links);
3021                                 xpt_release_device(path->device);
3022                                 free(cur_entry, M_CAMXPT);
3023                         } else {
3024                                 cur_entry->event_enable = csa->event_enable;
3025                         }
3026                         csa->event_enable = added;
3027                 } else {
3028                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
3029                                            M_NOWAIT);
3030                         if (cur_entry == NULL) {
3031                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
3032                                 break;
3033                         }
3034                         cur_entry->event_enable = csa->event_enable;
3035                         cur_entry->event_lock = (path->bus->sim->mtx &&
3036                             mtx_owned(path->bus->sim->mtx)) ? 1 : 0;
3037                         cur_entry->callback_arg = csa->callback_arg;
3038                         cur_entry->callback = csa->callback;
3039                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3040                         xpt_acquire_device(path->device);
3041                 }
3042                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3043                 break;
3044         }
3045         case XPT_REL_SIMQ:
3046         {
3047                 struct ccb_relsim *crs;
3048                 struct cam_ed *dev;
3049
3050                 crs = &start_ccb->crs;
3051                 dev = path->device;
3052                 if (dev == NULL) {
3053                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3054                         break;
3055                 }
3056
3057                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3058                         /* Don't ever go below one opening */
3059                         if (crs->openings > 0) {
3060                                 xpt_dev_ccbq_resize(path, crs->openings);
3061                                 if (bootverbose) {
3062                                         xpt_print(path,
3063                                             "number of openings is now %d\n",
3064                                             crs->openings);
3065                                 }
3066                         }
3067                 }
3068
3069                 mtx_lock(&dev->sim->devq->send_mtx);
3070                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3071                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3072                                 /*
3073                                  * Just extend the old timeout and decrement
3074                                  * the freeze count so that a single timeout
3075                                  * is sufficient for releasing the queue.
3076                                  */
3077                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3078                                 callout_stop(&dev->callout);
3079                         } else {
3080                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3081                         }
3082
3083                         callout_reset_sbt(&dev->callout,
3084                             SBT_1MS * crs->release_timeout, 0,
3085                             xpt_release_devq_timeout, dev, 0);
3086
3087                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3088                 }
3089
3090                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3091                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3092                                 /*
3093                                  * Decrement the freeze count so that a single
3094                                  * completion is still sufficient to unfreeze
3095                                  * the queue.
3096                                  */
3097                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3098                         } else {
3099                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3100                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3101                         }
3102                 }
3103
3104                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3105                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3106                          || (dev->ccbq.dev_active == 0)) {
3107                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3108                         } else {
3109                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3110                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3111                         }
3112                 }
3113                 mtx_unlock(&dev->sim->devq->send_mtx);
3114
3115                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3116                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3117                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3118                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3119                 break;
3120         }
3121         case XPT_DEBUG: {
3122                 struct cam_path *oldpath;
3123
3124                 /* Check that all request bits are supported. */
3125                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3126                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3127                         break;
3128                 }
3129
3130                 cam_dflags = CAM_DEBUG_NONE;
3131                 if (cam_dpath != NULL) {
3132                         oldpath = cam_dpath;
3133                         cam_dpath = NULL;
3134                         xpt_free_path(oldpath);
3135                 }
3136                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3137                         if (xpt_create_path(&cam_dpath, NULL,
3138                                             start_ccb->ccb_h.path_id,
3139                                             start_ccb->ccb_h.target_id,
3140                                             start_ccb->ccb_h.target_lun) !=
3141                                             CAM_REQ_CMP) {
3142                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3143                         } else {
3144                                 cam_dflags = start_ccb->cdbg.flags;
3145                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3146                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3147                                     cam_dflags);
3148                         }
3149                 } else
3150                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3151                 break;
3152         }
3153         case XPT_NOOP:
3154                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3155                         xpt_freeze_devq(path, 1);
3156                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3157                 break;
3158         case XPT_REPROBE_LUN:
3159                 xpt_async(AC_INQ_CHANGED, path, NULL);
3160                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3161                 xpt_done(start_ccb);
3162                 break;
3163         case XPT_ASYNC:
3164                 /*
3165                  * Queue the async operation so it can be run from a sleepable
3166                  * context.
3167                  */
3168                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3169                 mtx_lock(&cam_async.cam_doneq_mtx);
3170                 STAILQ_INSERT_TAIL(&cam_async.cam_doneq, &start_ccb->ccb_h, sim_links.stqe);
3171                 start_ccb->ccb_h.pinfo.index = CAM_ASYNC_INDEX;
3172                 mtx_unlock(&cam_async.cam_doneq_mtx);
3173                 wakeup(&cam_async.cam_doneq);
3174                 break;
3175         default:
3176         case XPT_SDEV_TYPE:
3177         case XPT_TERM_IO:
3178         case XPT_ENG_INQ:
3179                 /* XXX Implement */
3180                 xpt_print(start_ccb->ccb_h.path,
3181                     "%s: CCB type %#x %s not supported\n", __func__,
3182                     start_ccb->ccb_h.func_code,
3183                     xpt_action_name(start_ccb->ccb_h.func_code));
3184                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3185                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3186                         xpt_done(start_ccb);
3187                 }
3188                 break;
3189         }
3190         CAM_DEBUG(path, CAM_DEBUG_TRACE,
3191             ("xpt_action_default: func= %#x %s status %#x\n",
3192                 start_ccb->ccb_h.func_code,
3193                 xpt_action_name(start_ccb->ccb_h.func_code),
3194                 start_ccb->ccb_h.status));
3195 }
3196
3197 /*
3198  * Call the sim poll routine to allow the sim to complete
3199  * any inflight requests, then call camisr_runqueue to
3200  * complete any CCB that the polling completed.
3201  */
3202 void
3203 xpt_sim_poll(struct cam_sim *sim)
3204 {
3205         struct mtx *mtx;
3206
3207         KASSERT(cam_sim_pollable(sim), ("%s: non-pollable sim", __func__));
3208         mtx = sim->mtx;
3209         if (mtx)
3210                 mtx_lock(mtx);
3211         (*(sim->sim_poll))(sim);
3212         if (mtx)
3213                 mtx_unlock(mtx);
3214         camisr_runqueue();
3215 }
3216
3217 uint32_t
3218 xpt_poll_setup(union ccb *start_ccb)
3219 {
3220         u_int32_t timeout;
3221         struct    cam_sim *sim;
3222         struct    cam_devq *devq;
3223         struct    cam_ed *dev;
3224
3225         timeout = start_ccb->ccb_h.timeout * 10;
3226         sim = start_ccb->ccb_h.path->bus->sim;
3227         devq = sim->devq;
3228         dev = start_ccb->ccb_h.path->device;
3229
3230         KASSERT(cam_sim_pollable(sim), ("%s: non-pollable sim", __func__));
3231
3232         /*
3233          * Steal an opening so that no other queued requests
3234          * can get it before us while we simulate interrupts.
3235          */
3236         mtx_lock(&devq->send_mtx);
3237         dev->ccbq.dev_openings--;
3238         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3239             (--timeout > 0)) {
3240                 mtx_unlock(&devq->send_mtx);
3241                 DELAY(100);
3242                 xpt_sim_poll(sim);
3243                 mtx_lock(&devq->send_mtx);
3244         }
3245         dev->ccbq.dev_openings++;
3246         mtx_unlock(&devq->send_mtx);
3247
3248         return (timeout);
3249 }
3250
3251 void
3252 xpt_pollwait(union ccb *start_ccb, uint32_t timeout)
3253 {
3254
3255         KASSERT(cam_sim_pollable(start_ccb->ccb_h.path->bus->sim),
3256             ("%s: non-pollable sim", __func__));
3257         while (--timeout > 0) {
3258                 xpt_sim_poll(start_ccb->ccb_h.path->bus->sim);
3259                 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3260                     != CAM_REQ_INPROG)
3261                         break;
3262                 DELAY(100);
3263         }
3264
3265         if (timeout == 0) {
3266                 /*
3267                  * XXX Is it worth adding a sim_timeout entry
3268                  * point so we can attempt recovery?  If
3269                  * this is only used for dumps, I don't think
3270                  * it is.
3271                  */
3272                 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3273         }
3274 }
3275
3276 /*
3277  * Schedule a peripheral driver to receive a ccb when its
3278  * target device has space for more transactions.
3279  */
3280 void
3281 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3282 {
3283
3284         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3285         cam_periph_assert(periph, MA_OWNED);
3286         if (new_priority < periph->scheduled_priority) {
3287                 periph->scheduled_priority = new_priority;
3288                 xpt_run_allocq(periph, 0);
3289         }
3290 }
3291
3292 /*
3293  * Schedule a device to run on a given queue.
3294  * If the device was inserted as a new entry on the queue,
3295  * return 1 meaning the device queue should be run. If we
3296  * were already queued, implying someone else has already
3297  * started the queue, return 0 so the caller doesn't attempt
3298  * to run the queue.
3299  */
3300 static int
3301 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3302                  u_int32_t new_priority)
3303 {
3304         int retval;
3305         u_int32_t old_priority;
3306
3307         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3308
3309         old_priority = pinfo->priority;
3310
3311         /*
3312          * Are we already queued?
3313          */
3314         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3315                 /* Simply reorder based on new priority */
3316                 if (new_priority < old_priority) {
3317                         camq_change_priority(queue, pinfo->index,
3318                                              new_priority);
3319                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3320                                         ("changed priority to %d\n",
3321                                          new_priority));
3322                         retval = 1;
3323                 } else
3324                         retval = 0;
3325         } else {
3326                 /* New entry on the queue */
3327                 if (new_priority < old_priority)
3328                         pinfo->priority = new_priority;
3329
3330                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3331                                 ("Inserting onto queue\n"));
3332                 pinfo->generation = ++queue->generation;
3333                 camq_insert(queue, pinfo);
3334                 retval = 1;
3335         }
3336         return (retval);
3337 }
3338
3339 static void
3340 xpt_run_allocq_task(void *context, int pending)
3341 {
3342         struct cam_periph *periph = context;
3343
3344         cam_periph_lock(periph);
3345         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3346         xpt_run_allocq(periph, 1);
3347         cam_periph_unlock(periph);
3348         cam_periph_release(periph);
3349 }
3350
3351 static void
3352 xpt_run_allocq(struct cam_periph *periph, int sleep)
3353 {
3354         struct cam_ed   *device;
3355         union ccb       *ccb;
3356         uint32_t         prio;
3357
3358         cam_periph_assert(periph, MA_OWNED);
3359         if (periph->periph_allocating)
3360                 return;
3361         cam_periph_doacquire(periph);
3362         periph->periph_allocating = 1;
3363         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3364         device = periph->path->device;
3365         ccb = NULL;
3366 restart:
3367         while ((prio = min(periph->scheduled_priority,
3368             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3369             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3370              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3371                 if (ccb == NULL &&
3372                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3373                         if (sleep) {
3374                                 ccb = xpt_get_ccb(periph);
3375                                 goto restart;
3376                         }
3377                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3378                                 break;
3379                         cam_periph_doacquire(periph);
3380                         periph->flags |= CAM_PERIPH_RUN_TASK;
3381                         taskqueue_enqueue(xsoftc.xpt_taskq,
3382                             &periph->periph_run_task);
3383                         break;
3384                 }
3385                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3386                 if (prio == periph->immediate_priority) {
3387                         periph->immediate_priority = CAM_PRIORITY_NONE;
3388                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3389                                         ("waking cam_periph_getccb()\n"));
3390                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3391                                           periph_links.sle);
3392                         wakeup(&periph->ccb_list);
3393                 } else {
3394                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3395                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3396                                         ("calling periph_start()\n"));
3397                         periph->periph_start(periph, ccb);
3398                 }
3399                 ccb = NULL;
3400         }
3401         if (ccb != NULL)
3402                 xpt_release_ccb(ccb);
3403         periph->periph_allocating = 0;
3404         cam_periph_release_locked(periph);
3405 }
3406
3407 static void
3408 xpt_run_devq(struct cam_devq *devq)
3409 {
3410         struct mtx *mtx;
3411
3412         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3413
3414         devq->send_queue.qfrozen_cnt++;
3415         while ((devq->send_queue.entries > 0)
3416             && (devq->send_openings > 0)
3417             && (devq->send_queue.qfrozen_cnt <= 1)) {
3418                 struct  cam_ed *device;
3419                 union ccb *work_ccb;
3420                 struct  cam_sim *sim;
3421                 struct xpt_proto *proto;
3422
3423                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3424                                                            CAMQ_HEAD);
3425                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3426                                 ("running device %p\n", device));
3427
3428                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3429                 if (work_ccb == NULL) {
3430                         printf("device on run queue with no ccbs???\n");
3431                         continue;
3432                 }
3433
3434                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3435                         mtx_lock(&xsoftc.xpt_highpower_lock);
3436                         if (xsoftc.num_highpower <= 0) {
3437                                 /*
3438                                  * We got a high power command, but we
3439                                  * don't have any available slots.  Freeze
3440                                  * the device queue until we have a slot
3441                                  * available.
3442                                  */
3443                                 xpt_freeze_devq_device(device, 1);
3444                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3445                                                    highpowerq_entry);
3446
3447                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3448                                 continue;
3449                         } else {
3450                                 /*
3451                                  * Consume a high power slot while
3452                                  * this ccb runs.
3453                                  */
3454                                 xsoftc.num_highpower--;
3455                         }
3456                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3457                 }
3458                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3459                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3460                 devq->send_openings--;
3461                 devq->send_active++;
3462                 xpt_schedule_devq(devq, device);
3463                 mtx_unlock(&devq->send_mtx);
3464
3465                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3466                         /*
3467                          * The client wants to freeze the queue
3468                          * after this CCB is sent.
3469                          */
3470                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3471                 }
3472
3473                 /* In Target mode, the peripheral driver knows best... */
3474                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3475                         if ((device->inq_flags & SID_CmdQue) != 0
3476                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3477                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3478                         else
3479                                 /*
3480                                  * Clear this in case of a retried CCB that
3481                                  * failed due to a rejected tag.
3482                                  */
3483                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3484                 }
3485
3486                 KASSERT(device == work_ccb->ccb_h.path->device,
3487                     ("device (%p) / path->device (%p) mismatch",
3488                         device, work_ccb->ccb_h.path->device));
3489                 proto = xpt_proto_find(device->protocol);
3490                 if (proto && proto->ops->debug_out)
3491                         proto->ops->debug_out(work_ccb);
3492
3493                 /*
3494                  * Device queues can be shared among multiple SIM instances
3495                  * that reside on different buses.  Use the SIM from the
3496                  * queued device, rather than the one from the calling bus.
3497                  */
3498                 sim = device->sim;
3499                 mtx = sim->mtx;
3500                 if (mtx && !mtx_owned(mtx))
3501                         mtx_lock(mtx);
3502                 else
3503                         mtx = NULL;
3504                 work_ccb->ccb_h.qos.periph_data = cam_iosched_now();
3505                 (*(sim->sim_action))(sim, work_ccb);
3506                 if (mtx)
3507                         mtx_unlock(mtx);
3508                 mtx_lock(&devq->send_mtx);
3509         }
3510         devq->send_queue.qfrozen_cnt--;
3511 }
3512
3513 /*
3514  * This function merges stuff from the src ccb into the dst ccb, while keeping
3515  * important fields in the dst ccb constant.
3516  */
3517 void
3518 xpt_merge_ccb(union ccb *dst_ccb, union ccb *src_ccb)
3519 {
3520
3521         /*
3522          * Pull fields that are valid for peripheral drivers to set
3523          * into the dst CCB along with the CCB "payload".
3524          */
3525         dst_ccb->ccb_h.retry_count = src_ccb->ccb_h.retry_count;
3526         dst_ccb->ccb_h.func_code = src_ccb->ccb_h.func_code;
3527         dst_ccb->ccb_h.timeout = src_ccb->ccb_h.timeout;
3528         dst_ccb->ccb_h.flags = src_ccb->ccb_h.flags;
3529         bcopy(&(&src_ccb->ccb_h)[1], &(&dst_ccb->ccb_h)[1],
3530               sizeof(union ccb) - sizeof(struct ccb_hdr));
3531 }
3532
3533 void
3534 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3535                     u_int32_t priority, u_int32_t flags)
3536 {
3537
3538         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3539         ccb_h->pinfo.priority = priority;
3540         ccb_h->path = path;
3541         ccb_h->path_id = path->bus->path_id;
3542         if (path->target)
3543                 ccb_h->target_id = path->target->target_id;
3544         else
3545                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3546         if (path->device) {
3547                 ccb_h->target_lun = path->device->lun_id;
3548                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3549         } else {
3550                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3551         }
3552         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3553         ccb_h->flags = flags;
3554         ccb_h->xflags = 0;
3555 }
3556
3557 void
3558 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3559 {
3560         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3561 }
3562
3563 /* Path manipulation functions */
3564 cam_status
3565 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3566                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3567 {
3568         struct     cam_path *path;
3569         cam_status status;
3570
3571         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3572
3573         if (path == NULL) {
3574                 status = CAM_RESRC_UNAVAIL;
3575                 return(status);
3576         }
3577         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3578         if (status != CAM_REQ_CMP) {
3579                 free(path, M_CAMPATH);
3580                 path = NULL;
3581         }
3582         *new_path_ptr = path;
3583         return (status);
3584 }
3585
3586 cam_status
3587 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3588                          struct cam_periph *periph, path_id_t path_id,
3589                          target_id_t target_id, lun_id_t lun_id)
3590 {
3591
3592         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3593             lun_id));
3594 }
3595
3596 cam_status
3597 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3598                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3599 {
3600         struct       cam_eb *bus;
3601         struct       cam_et *target;
3602         struct       cam_ed *device;
3603         cam_status   status;
3604
3605         status = CAM_REQ_CMP;   /* Completed without error */
3606         target = NULL;          /* Wildcarded */
3607         device = NULL;          /* Wildcarded */
3608
3609         /*
3610          * We will potentially modify the EDT, so block interrupts
3611          * that may attempt to create cam paths.
3612          */
3613         bus = xpt_find_bus(path_id);
3614         if (bus == NULL) {
3615                 status = CAM_PATH_INVALID;
3616         } else {
3617                 xpt_lock_buses();
3618                 mtx_lock(&bus->eb_mtx);
3619                 target = xpt_find_target(bus, target_id);
3620                 if (target == NULL) {
3621                         /* Create one */
3622                         struct cam_et *new_target;
3623
3624                         new_target = xpt_alloc_target(bus, target_id);
3625                         if (new_target == NULL) {
3626                                 status = CAM_RESRC_UNAVAIL;
3627                         } else {
3628                                 target = new_target;
3629                         }
3630                 }
3631                 xpt_unlock_buses();
3632                 if (target != NULL) {
3633                         device = xpt_find_device(target, lun_id);
3634                         if (device == NULL) {
3635                                 /* Create one */
3636                                 struct cam_ed *new_device;
3637
3638                                 new_device =
3639                                     (*(bus->xport->ops->alloc_device))(bus,
3640                                                                        target,
3641                                                                        lun_id);
3642                                 if (new_device == NULL) {
3643                                         status = CAM_RESRC_UNAVAIL;
3644                                 } else {
3645                                         device = new_device;
3646                                 }
3647                         }
3648                 }
3649                 mtx_unlock(&bus->eb_mtx);
3650         }
3651
3652         /*
3653          * Only touch the user's data if we are successful.
3654          */
3655         if (status == CAM_REQ_CMP) {
3656                 new_path->periph = perph;
3657                 new_path->bus = bus;
3658                 new_path->target = target;
3659                 new_path->device = device;
3660                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3661         } else {
3662                 if (device != NULL)
3663                         xpt_release_device(device);
3664                 if (target != NULL)
3665                         xpt_release_target(target);
3666                 if (bus != NULL)
3667                         xpt_release_bus(bus);
3668         }
3669         return (status);
3670 }
3671
3672 cam_status
3673 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3674 {
3675         struct     cam_path *new_path;
3676
3677         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3678         if (new_path == NULL)
3679                 return(CAM_RESRC_UNAVAIL);
3680         *new_path = *path;
3681         if (path->bus != NULL)
3682                 xpt_acquire_bus(path->bus);
3683         if (path->target != NULL)
3684                 xpt_acquire_target(path->target);
3685         if (path->device != NULL)
3686                 xpt_acquire_device(path->device);
3687         *new_path_ptr = new_path;
3688         return (CAM_REQ_CMP);
3689 }
3690
3691 void
3692 xpt_release_path(struct cam_path *path)
3693 {
3694         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3695         if (path->device != NULL) {
3696                 xpt_release_device(path->device);
3697                 path->device = NULL;
3698         }
3699         if (path->target != NULL) {
3700                 xpt_release_target(path->target);
3701                 path->target = NULL;
3702         }
3703         if (path->bus != NULL) {
3704                 xpt_release_bus(path->bus);
3705                 path->bus = NULL;
3706         }
3707 }
3708
3709 void
3710 xpt_free_path(struct cam_path *path)
3711 {
3712
3713         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3714         xpt_release_path(path);
3715         free(path, M_CAMPATH);
3716 }
3717
3718 void
3719 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3720     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3721 {
3722
3723         xpt_lock_buses();
3724         if (bus_ref) {
3725                 if (path->bus)
3726                         *bus_ref = path->bus->refcount;
3727                 else
3728                         *bus_ref = 0;
3729         }
3730         if (periph_ref) {
3731                 if (path->periph)
3732                         *periph_ref = path->periph->refcount;
3733                 else
3734                         *periph_ref = 0;
3735         }
3736         xpt_unlock_buses();
3737         if (target_ref) {
3738                 if (path->target)
3739                         *target_ref = path->target->refcount;
3740                 else
3741                         *target_ref = 0;
3742         }
3743         if (device_ref) {
3744                 if (path->device)
3745                         *device_ref = path->device->refcount;
3746                 else
3747                         *device_ref = 0;
3748         }
3749 }
3750
3751 /*
3752  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3753  * in path1, 2 for match with wildcards in path2.
3754  */
3755 int
3756 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3757 {
3758         int retval = 0;
3759
3760         if (path1->bus != path2->bus) {
3761                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3762                         retval = 1;
3763                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3764                         retval = 2;
3765                 else
3766                         return (-1);
3767         }
3768         if (path1->target != path2->target) {
3769                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3770                         if (retval == 0)
3771                                 retval = 1;
3772                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3773                         retval = 2;
3774                 else
3775                         return (-1);
3776         }
3777         if (path1->device != path2->device) {
3778                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3779                         if (retval == 0)
3780                                 retval = 1;
3781                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3782                         retval = 2;
3783                 else
3784                         return (-1);
3785         }
3786         return (retval);
3787 }
3788
3789 int
3790 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3791 {
3792         int retval = 0;
3793
3794         if (path->bus != dev->target->bus) {
3795                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3796                         retval = 1;
3797                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3798                         retval = 2;
3799                 else
3800                         return (-1);
3801         }
3802         if (path->target != dev->target) {
3803                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3804                         if (retval == 0)
3805                                 retval = 1;
3806                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3807                         retval = 2;
3808                 else
3809                         return (-1);
3810         }
3811         if (path->device != dev) {
3812                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3813                         if (retval == 0)
3814                                 retval = 1;
3815                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3816                         retval = 2;
3817                 else
3818                         return (-1);
3819         }
3820         return (retval);
3821 }
3822
3823 void
3824 xpt_print_path(struct cam_path *path)
3825 {
3826         struct sbuf sb;
3827         char buffer[XPT_PRINT_LEN];
3828
3829         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3830         xpt_path_sbuf(path, &sb);
3831         sbuf_finish(&sb);
3832         printf("%s", sbuf_data(&sb));
3833         sbuf_delete(&sb);
3834 }
3835
3836 void
3837 xpt_print_device(struct cam_ed *device)
3838 {
3839
3840         if (device == NULL)
3841                 printf("(nopath): ");
3842         else {
3843                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3844                        device->sim->unit_number,
3845                        device->sim->bus_id,
3846                        device->target->target_id,
3847                        (uintmax_t)device->lun_id);
3848         }
3849 }
3850
3851 void
3852 xpt_print(struct cam_path *path, const char *fmt, ...)
3853 {
3854         va_list ap;
3855         struct sbuf sb;
3856         char buffer[XPT_PRINT_LEN];
3857
3858         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3859
3860         xpt_path_sbuf(path, &sb);
3861         va_start(ap, fmt);
3862         sbuf_vprintf(&sb, fmt, ap);
3863         va_end(ap);
3864
3865         sbuf_finish(&sb);
3866         printf("%s", sbuf_data(&sb));
3867         sbuf_delete(&sb);
3868 }
3869
3870 int
3871 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3872 {
3873         struct sbuf sb;
3874         int len;
3875
3876         sbuf_new(&sb, str, str_len, 0);
3877         len = xpt_path_sbuf(path, &sb);
3878         sbuf_finish(&sb);
3879         return (len);
3880 }
3881
3882 int
3883 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb)
3884 {
3885
3886         if (path == NULL)
3887                 sbuf_printf(sb, "(nopath): ");
3888         else {
3889                 if (path->periph != NULL)
3890                         sbuf_printf(sb, "(%s%d:", path->periph->periph_name,
3891                                     path->periph->unit_number);
3892                 else
3893                         sbuf_printf(sb, "(noperiph:");
3894
3895                 if (path->bus != NULL)
3896                         sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name,
3897                                     path->bus->sim->unit_number,
3898                                     path->bus->sim->bus_id);
3899                 else
3900                         sbuf_printf(sb, "nobus:");
3901
3902                 if (path->target != NULL)
3903                         sbuf_printf(sb, "%d:", path->target->target_id);
3904                 else
3905                         sbuf_printf(sb, "X:");
3906
3907                 if (path->device != NULL)
3908                         sbuf_printf(sb, "%jx): ",
3909                             (uintmax_t)path->device->lun_id);
3910                 else
3911                         sbuf_printf(sb, "X): ");
3912         }
3913
3914         return(sbuf_len(sb));
3915 }
3916
3917 path_id_t
3918 xpt_path_path_id(struct cam_path *path)
3919 {
3920         return(path->bus->path_id);
3921 }
3922
3923 target_id_t
3924 xpt_path_target_id(struct cam_path *path)
3925 {
3926         if (path->target != NULL)
3927                 return (path->target->target_id);
3928         else
3929                 return (CAM_TARGET_WILDCARD);
3930 }
3931
3932 lun_id_t
3933 xpt_path_lun_id(struct cam_path *path)
3934 {
3935         if (path->device != NULL)
3936                 return (path->device->lun_id);
3937         else
3938                 return (CAM_LUN_WILDCARD);
3939 }
3940
3941 struct cam_sim *
3942 xpt_path_sim(struct cam_path *path)
3943 {
3944
3945         return (path->bus->sim);
3946 }
3947
3948 struct cam_periph*
3949 xpt_path_periph(struct cam_path *path)
3950 {
3951
3952         return (path->periph);
3953 }
3954
3955 /*
3956  * Release a CAM control block for the caller.  Remit the cost of the structure
3957  * to the device referenced by the path.  If the this device had no 'credits'
3958  * and peripheral drivers have registered async callbacks for this notification
3959  * call them now.
3960  */
3961 void
3962 xpt_release_ccb(union ccb *free_ccb)
3963 {
3964         struct   cam_ed *device;
3965         struct   cam_periph *periph;
3966
3967         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3968         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3969         device = free_ccb->ccb_h.path->device;
3970         periph = free_ccb->ccb_h.path->periph;
3971
3972         xpt_free_ccb(free_ccb);
3973         periph->periph_allocated--;
3974         cam_ccbq_release_opening(&device->ccbq);
3975         xpt_run_allocq(periph, 0);
3976 }
3977
3978 /* Functions accessed by SIM drivers */
3979
3980 static struct xpt_xport_ops xport_default_ops = {
3981         .alloc_device = xpt_alloc_device_default,
3982         .action = xpt_action_default,
3983         .async = xpt_dev_async_default,
3984 };
3985 static struct xpt_xport xport_default = {
3986         .xport = XPORT_UNKNOWN,
3987         .name = "unknown",
3988         .ops = &xport_default_ops,
3989 };
3990
3991 CAM_XPT_XPORT(xport_default);
3992
3993 /*
3994  * A sim structure, listing the SIM entry points and instance
3995  * identification info is passed to xpt_bus_register to hook the SIM
3996  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
3997  * for this new bus and places it in the array of buses and assigns
3998  * it a path_id.  The path_id may be influenced by "hard wiring"
3999  * information specified by the user.  Once interrupt services are
4000  * available, the bus will be probed.
4001  */
4002 int32_t
4003 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
4004 {
4005         struct cam_eb *new_bus;
4006         struct cam_eb *old_bus;
4007         struct ccb_pathinq cpi;
4008         struct cam_path *path;
4009         cam_status status;
4010
4011         sim->bus_id = bus;
4012         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
4013                                           M_CAMXPT, M_NOWAIT|M_ZERO);
4014         if (new_bus == NULL) {
4015                 /* Couldn't satisfy request */
4016                 return (CAM_RESRC_UNAVAIL);
4017         }
4018
4019         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
4020         TAILQ_INIT(&new_bus->et_entries);
4021         cam_sim_hold(sim);
4022         new_bus->sim = sim;
4023         timevalclear(&new_bus->last_reset);
4024         new_bus->flags = 0;
4025         new_bus->refcount = 1;  /* Held until a bus_deregister event */
4026         new_bus->generation = 0;
4027
4028         xpt_lock_buses();
4029         sim->path_id = new_bus->path_id =
4030             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4031         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4032         while (old_bus != NULL
4033             && old_bus->path_id < new_bus->path_id)
4034                 old_bus = TAILQ_NEXT(old_bus, links);
4035         if (old_bus != NULL)
4036                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4037         else
4038                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
4039         xsoftc.bus_generation++;
4040         xpt_unlock_buses();
4041
4042         /*
4043          * Set a default transport so that a PATH_INQ can be issued to
4044          * the SIM.  This will then allow for probing and attaching of
4045          * a more appropriate transport.
4046          */
4047         new_bus->xport = &xport_default;
4048
4049         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
4050                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4051         if (status != CAM_REQ_CMP) {
4052                 xpt_release_bus(new_bus);
4053                 return (CAM_RESRC_UNAVAIL);
4054         }
4055
4056         xpt_path_inq(&cpi, path);
4057
4058         if (cpi.ccb_h.status == CAM_REQ_CMP) {
4059                 struct xpt_xport **xpt;
4060
4061                 SET_FOREACH(xpt, cam_xpt_xport_set) {
4062                         if ((*xpt)->xport == cpi.transport) {
4063                                 new_bus->xport = *xpt;
4064                                 break;
4065                         }
4066                 }
4067                 if (new_bus->xport == NULL) {
4068                         xpt_print(path,
4069                             "No transport found for %d\n", cpi.transport);
4070                         xpt_release_bus(new_bus);
4071                         free(path, M_CAMXPT);
4072                         return (CAM_RESRC_UNAVAIL);
4073                 }
4074         }
4075
4076         /* Notify interested parties */
4077         if (sim->path_id != CAM_XPT_PATH_ID) {
4078                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
4079                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
4080                         union   ccb *scan_ccb;
4081
4082                         /* Initiate bus rescan. */
4083                         scan_ccb = xpt_alloc_ccb_nowait();
4084                         if (scan_ccb != NULL) {
4085                                 scan_ccb->ccb_h.path = path;
4086                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
4087                                 scan_ccb->crcn.flags = 0;
4088                                 xpt_rescan(scan_ccb);
4089                         } else {
4090                                 xpt_print(path,
4091                                           "Can't allocate CCB to scan bus\n");
4092                                 xpt_free_path(path);
4093                         }
4094                 } else
4095                         xpt_free_path(path);
4096         } else
4097                 xpt_free_path(path);
4098         return (CAM_SUCCESS);
4099 }
4100
4101 int32_t
4102 xpt_bus_deregister(path_id_t pathid)
4103 {
4104         struct cam_path bus_path;
4105         cam_status status;
4106
4107         status = xpt_compile_path(&bus_path, NULL, pathid,
4108                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4109         if (status != CAM_REQ_CMP)
4110                 return (status);
4111
4112         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4113         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4114
4115         /* Release the reference count held while registered. */
4116         xpt_release_bus(bus_path.bus);
4117         xpt_release_path(&bus_path);
4118
4119         return (CAM_REQ_CMP);
4120 }
4121
4122 static path_id_t
4123 xptnextfreepathid(void)
4124 {
4125         struct cam_eb *bus;
4126         path_id_t pathid;
4127         const char *strval;
4128
4129         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4130         pathid = 0;
4131         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4132 retry:
4133         /* Find an unoccupied pathid */
4134         while (bus != NULL && bus->path_id <= pathid) {
4135                 if (bus->path_id == pathid)
4136                         pathid++;
4137                 bus = TAILQ_NEXT(bus, links);
4138         }
4139
4140         /*
4141          * Ensure that this pathid is not reserved for
4142          * a bus that may be registered in the future.
4143          */
4144         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4145                 ++pathid;
4146                 /* Start the search over */
4147                 goto retry;
4148         }
4149         return (pathid);
4150 }
4151
4152 static path_id_t
4153 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4154 {
4155         path_id_t pathid;
4156         int i, dunit, val;
4157         char buf[32];
4158         const char *dname;
4159
4160         pathid = CAM_XPT_PATH_ID;
4161         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4162         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4163                 return (pathid);
4164         i = 0;
4165         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4166                 if (strcmp(dname, "scbus")) {
4167                         /* Avoid a bit of foot shooting. */
4168                         continue;
4169                 }
4170                 if (dunit < 0)          /* unwired?! */
4171                         continue;
4172                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4173                         if (sim_bus == val) {
4174                                 pathid = dunit;
4175                                 break;
4176                         }
4177                 } else if (sim_bus == 0) {
4178                         /* Unspecified matches bus 0 */
4179                         pathid = dunit;
4180                         break;
4181                 } else {
4182                         printf("Ambiguous scbus configuration for %s%d "
4183                                "bus %d, cannot wire down.  The kernel "
4184                                "config entry for scbus%d should "
4185                                "specify a controller bus.\n"
4186                                "Scbus will be assigned dynamically.\n",
4187                                sim_name, sim_unit, sim_bus, dunit);
4188                         break;
4189                 }
4190         }
4191
4192         if (pathid == CAM_XPT_PATH_ID)
4193                 pathid = xptnextfreepathid();
4194         return (pathid);
4195 }
4196
4197 static const char *
4198 xpt_async_string(u_int32_t async_code)
4199 {
4200
4201         switch (async_code) {
4202         case AC_BUS_RESET: return ("AC_BUS_RESET");
4203         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4204         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4205         case AC_SENT_BDR: return ("AC_SENT_BDR");
4206         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4207         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4208         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4209         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4210         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4211         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4212         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4213         case AC_CONTRACT: return ("AC_CONTRACT");
4214         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4215         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4216         }
4217         return ("AC_UNKNOWN");
4218 }
4219
4220 static int
4221 xpt_async_size(u_int32_t async_code)
4222 {
4223
4224         switch (async_code) {
4225         case AC_BUS_RESET: return (0);
4226         case AC_UNSOL_RESEL: return (0);
4227         case AC_SCSI_AEN: return (0);
4228         case AC_SENT_BDR: return (0);
4229         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4230         case AC_PATH_DEREGISTERED: return (0);
4231         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4232         case AC_LOST_DEVICE: return (0);
4233         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4234         case AC_INQ_CHANGED: return (0);
4235         case AC_GETDEV_CHANGED: return (0);
4236         case AC_CONTRACT: return (sizeof(struct ac_contract));
4237         case AC_ADVINFO_CHANGED: return (-1);
4238         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4239         }
4240         return (0);
4241 }
4242
4243 static int
4244 xpt_async_process_dev(struct cam_ed *device, void *arg)
4245 {
4246         union ccb *ccb = arg;
4247         struct cam_path *path = ccb->ccb_h.path;
4248         void *async_arg = ccb->casync.async_arg_ptr;
4249         u_int32_t async_code = ccb->casync.async_code;
4250         int relock;
4251
4252         if (path->device != device
4253          && path->device->lun_id != CAM_LUN_WILDCARD
4254          && device->lun_id != CAM_LUN_WILDCARD)
4255                 return (1);
4256
4257         /*
4258          * The async callback could free the device.
4259          * If it is a broadcast async, it doesn't hold
4260          * device reference, so take our own reference.
4261          */
4262         xpt_acquire_device(device);
4263
4264         /*
4265          * If async for specific device is to be delivered to
4266          * the wildcard client, take the specific device lock.
4267          * XXX: We may need a way for client to specify it.
4268          */
4269         if ((device->lun_id == CAM_LUN_WILDCARD &&
4270              path->device->lun_id != CAM_LUN_WILDCARD) ||
4271             (device->target->target_id == CAM_TARGET_WILDCARD &&
4272              path->target->target_id != CAM_TARGET_WILDCARD) ||
4273             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4274              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4275                 mtx_unlock(&device->device_mtx);
4276                 xpt_path_lock(path);
4277                 relock = 1;
4278         } else
4279                 relock = 0;
4280
4281         (*(device->target->bus->xport->ops->async))(async_code,
4282             device->target->bus, device->target, device, async_arg);
4283         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4284
4285         if (relock) {
4286                 xpt_path_unlock(path);
4287                 mtx_lock(&device->device_mtx);
4288         }
4289         xpt_release_device(device);
4290         return (1);
4291 }
4292
4293 static int
4294 xpt_async_process_tgt(struct cam_et *target, void *arg)
4295 {
4296         union ccb *ccb = arg;
4297         struct cam_path *path = ccb->ccb_h.path;
4298
4299         if (path->target != target
4300          && path->target->target_id != CAM_TARGET_WILDCARD
4301          && target->target_id != CAM_TARGET_WILDCARD)
4302                 return (1);
4303
4304         if (ccb->casync.async_code == AC_SENT_BDR) {
4305                 /* Update our notion of when the last reset occurred */
4306                 microtime(&target->last_reset);
4307         }
4308
4309         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4310 }
4311
4312 static void
4313 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4314 {
4315         struct cam_eb *bus;
4316         struct cam_path *path;
4317         void *async_arg;
4318         u_int32_t async_code;
4319
4320         path = ccb->ccb_h.path;
4321         async_code = ccb->casync.async_code;
4322         async_arg = ccb->casync.async_arg_ptr;
4323         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4324             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4325         bus = path->bus;
4326
4327         if (async_code == AC_BUS_RESET) {
4328                 /* Update our notion of when the last reset occurred */
4329                 microtime(&bus->last_reset);
4330         }
4331
4332         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4333
4334         /*
4335          * If this wasn't a fully wildcarded async, tell all
4336          * clients that want all async events.
4337          */
4338         if (bus != xpt_periph->path->bus) {
4339                 xpt_path_lock(xpt_periph->path);
4340                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4341                 xpt_path_unlock(xpt_periph->path);
4342         }
4343
4344         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4345                 xpt_release_devq(path, 1, TRUE);
4346         else
4347                 xpt_release_simq(path->bus->sim, TRUE);
4348         if (ccb->casync.async_arg_size > 0)
4349                 free(async_arg, M_CAMXPT);
4350         xpt_free_path(path);
4351         xpt_free_ccb(ccb);
4352 }
4353
4354 static void
4355 xpt_async_bcast(struct async_list *async_head,
4356                 u_int32_t async_code,
4357                 struct cam_path *path, void *async_arg)
4358 {
4359         struct async_node *cur_entry;
4360         struct mtx *mtx;
4361
4362         cur_entry = SLIST_FIRST(async_head);
4363         while (cur_entry != NULL) {
4364                 struct async_node *next_entry;
4365                 /*
4366                  * Grab the next list entry before we call the current
4367                  * entry's callback.  This is because the callback function
4368                  * can delete its async callback entry.
4369                  */
4370                 next_entry = SLIST_NEXT(cur_entry, links);
4371                 if ((cur_entry->event_enable & async_code) != 0) {
4372                         mtx = cur_entry->event_lock ?
4373                             path->device->sim->mtx : NULL;
4374                         if (mtx)
4375                                 mtx_lock(mtx);
4376                         cur_entry->callback(cur_entry->callback_arg,
4377                                             async_code, path,
4378                                             async_arg);
4379                         if (mtx)
4380                                 mtx_unlock(mtx);
4381                 }
4382                 cur_entry = next_entry;
4383         }
4384 }
4385
4386 void
4387 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4388 {
4389         union ccb *ccb;
4390         int size;
4391
4392         ccb = xpt_alloc_ccb_nowait();
4393         if (ccb == NULL) {
4394                 xpt_print(path, "Can't allocate CCB to send %s\n",
4395                     xpt_async_string(async_code));
4396                 return;
4397         }
4398
4399         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4400                 xpt_print(path, "Can't allocate path to send %s\n",
4401                     xpt_async_string(async_code));
4402                 xpt_free_ccb(ccb);
4403                 return;
4404         }
4405         ccb->ccb_h.path->periph = NULL;
4406         ccb->ccb_h.func_code = XPT_ASYNC;
4407         ccb->ccb_h.cbfcnp = xpt_async_process;
4408         ccb->ccb_h.flags |= CAM_UNLOCKED;
4409         ccb->casync.async_code = async_code;
4410         ccb->casync.async_arg_size = 0;
4411         size = xpt_async_size(async_code);
4412         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
4413             ("xpt_async: func %#x %s aync_code %d %s\n",
4414                 ccb->ccb_h.func_code,
4415                 xpt_action_name(ccb->ccb_h.func_code),
4416                 async_code,
4417                 xpt_async_string(async_code)));
4418         if (size > 0 && async_arg != NULL) {
4419                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4420                 if (ccb->casync.async_arg_ptr == NULL) {
4421                         xpt_print(path, "Can't allocate argument to send %s\n",
4422                             xpt_async_string(async_code));
4423                         xpt_free_path(ccb->ccb_h.path);
4424                         xpt_free_ccb(ccb);
4425                         return;
4426                 }
4427                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4428                 ccb->casync.async_arg_size = size;
4429         } else if (size < 0) {
4430                 ccb->casync.async_arg_ptr = async_arg;
4431                 ccb->casync.async_arg_size = size;
4432         }
4433         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4434                 xpt_freeze_devq(path, 1);
4435         else
4436                 xpt_freeze_simq(path->bus->sim, 1);
4437         xpt_action(ccb);
4438 }
4439
4440 static void
4441 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4442                       struct cam_et *target, struct cam_ed *device,
4443                       void *async_arg)
4444 {
4445
4446         /*
4447          * We only need to handle events for real devices.
4448          */
4449         if (target->target_id == CAM_TARGET_WILDCARD
4450          || device->lun_id == CAM_LUN_WILDCARD)
4451                 return;
4452
4453         printf("%s called\n", __func__);
4454 }
4455
4456 static uint32_t
4457 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4458 {
4459         struct cam_devq *devq;
4460         uint32_t freeze;
4461
4462         devq = dev->sim->devq;
4463         mtx_assert(&devq->send_mtx, MA_OWNED);
4464         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4465             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4466             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4467         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4468         /* Remove frozen device from sendq. */
4469         if (device_is_queued(dev))
4470                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4471         return (freeze);
4472 }
4473
4474 u_int32_t
4475 xpt_freeze_devq(struct cam_path *path, u_int count)
4476 {
4477         struct cam_ed   *dev = path->device;
4478         struct cam_devq *devq;
4479         uint32_t         freeze;
4480
4481         devq = dev->sim->devq;
4482         mtx_lock(&devq->send_mtx);
4483         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4484         freeze = xpt_freeze_devq_device(dev, count);
4485         mtx_unlock(&devq->send_mtx);
4486         return (freeze);
4487 }
4488
4489 u_int32_t
4490 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4491 {
4492         struct cam_devq *devq;
4493         uint32_t         freeze;
4494
4495         devq = sim->devq;
4496         mtx_lock(&devq->send_mtx);
4497         freeze = (devq->send_queue.qfrozen_cnt += count);
4498         mtx_unlock(&devq->send_mtx);
4499         return (freeze);
4500 }
4501
4502 static void
4503 xpt_release_devq_timeout(void *arg)
4504 {
4505         struct cam_ed *dev;
4506         struct cam_devq *devq;
4507
4508         dev = (struct cam_ed *)arg;
4509         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4510         devq = dev->sim->devq;
4511         mtx_assert(&devq->send_mtx, MA_OWNED);
4512         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4513                 xpt_run_devq(devq);
4514 }
4515
4516 void
4517 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4518 {
4519         struct cam_ed *dev;
4520         struct cam_devq *devq;
4521
4522         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4523             count, run_queue));
4524         dev = path->device;
4525         devq = dev->sim->devq;
4526         mtx_lock(&devq->send_mtx);
4527         if (xpt_release_devq_device(dev, count, run_queue))
4528                 xpt_run_devq(dev->sim->devq);
4529         mtx_unlock(&devq->send_mtx);
4530 }
4531
4532 static int
4533 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4534 {
4535
4536         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4537         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4538             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4539             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4540         if (count > dev->ccbq.queue.qfrozen_cnt) {
4541 #ifdef INVARIANTS
4542                 printf("xpt_release_devq(): requested %u > present %u\n",
4543                     count, dev->ccbq.queue.qfrozen_cnt);
4544 #endif
4545                 count = dev->ccbq.queue.qfrozen_cnt;
4546         }
4547         dev->ccbq.queue.qfrozen_cnt -= count;
4548         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4549                 /*
4550                  * No longer need to wait for a successful
4551                  * command completion.
4552                  */
4553                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4554                 /*
4555                  * Remove any timeouts that might be scheduled
4556                  * to release this queue.
4557                  */
4558                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4559                         callout_stop(&dev->callout);
4560                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4561                 }
4562                 /*
4563                  * Now that we are unfrozen schedule the
4564                  * device so any pending transactions are
4565                  * run.
4566                  */
4567                 xpt_schedule_devq(dev->sim->devq, dev);
4568         } else
4569                 run_queue = 0;
4570         return (run_queue);
4571 }
4572
4573 void
4574 xpt_release_simq(struct cam_sim *sim, int run_queue)
4575 {
4576         struct cam_devq *devq;
4577
4578         devq = sim->devq;
4579         mtx_lock(&devq->send_mtx);
4580         if (devq->send_queue.qfrozen_cnt <= 0) {
4581 #ifdef INVARIANTS
4582                 printf("xpt_release_simq: requested 1 > present %u\n",
4583                     devq->send_queue.qfrozen_cnt);
4584 #endif
4585         } else
4586                 devq->send_queue.qfrozen_cnt--;
4587         if (devq->send_queue.qfrozen_cnt == 0) {
4588                 if (run_queue) {
4589                         /*
4590                          * Now that we are unfrozen run the send queue.
4591                          */
4592                         xpt_run_devq(sim->devq);
4593                 }
4594         }
4595         mtx_unlock(&devq->send_mtx);
4596 }
4597
4598 void
4599 xpt_done(union ccb *done_ccb)
4600 {
4601         struct cam_doneq *queue;
4602         int     run, hash;
4603
4604 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4605         if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4606             done_ccb->csio.bio != NULL)
4607                 biotrack(done_ccb->csio.bio, __func__);
4608 #endif
4609
4610         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4611             ("xpt_done: func= %#x %s status %#x\n",
4612                 done_ccb->ccb_h.func_code,
4613                 xpt_action_name(done_ccb->ccb_h.func_code),
4614                 done_ccb->ccb_h.status));
4615         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4616                 return;
4617
4618         /* Store the time the ccb was in the sim */
4619         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4620         hash = (u_int)(done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4621             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4622         queue = &cam_doneqs[hash];
4623         mtx_lock(&queue->cam_doneq_mtx);
4624         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4625         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4626         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4627         mtx_unlock(&queue->cam_doneq_mtx);
4628         if (run)
4629                 wakeup(&queue->cam_doneq);
4630 }
4631
4632 void
4633 xpt_done_direct(union ccb *done_ccb)
4634 {
4635
4636         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4637             ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4638         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4639                 return;
4640
4641         /* Store the time the ccb was in the sim */
4642         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4643         xpt_done_process(&done_ccb->ccb_h);
4644 }
4645
4646 union ccb *
4647 xpt_alloc_ccb(void)
4648 {
4649         union ccb *new_ccb;
4650
4651         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4652         return (new_ccb);
4653 }
4654
4655 union ccb *
4656 xpt_alloc_ccb_nowait(void)
4657 {
4658         union ccb *new_ccb;
4659
4660         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4661         return (new_ccb);
4662 }
4663
4664 void
4665 xpt_free_ccb(union ccb *free_ccb)
4666 {
4667         struct cam_periph *periph;
4668
4669         if (free_ccb->ccb_h.alloc_flags & CAM_CCB_FROM_UMA) {
4670                 /*
4671                  * Looks like a CCB allocated from a periph UMA zone.
4672                  */
4673                 periph = free_ccb->ccb_h.path->periph;
4674                 uma_zfree(periph->ccb_zone, free_ccb);
4675         } else {
4676                 free(free_ccb, M_CAMCCB);
4677         }
4678 }
4679
4680 /* Private XPT functions */
4681
4682 /*
4683  * Get a CAM control block for the caller. Charge the structure to the device
4684  * referenced by the path.  If we don't have sufficient resources to allocate
4685  * more ccbs, we return NULL.
4686  */
4687 static union ccb *
4688 xpt_get_ccb_nowait(struct cam_periph *periph)
4689 {
4690         union ccb *new_ccb;
4691         int alloc_flags;
4692
4693         if (periph->ccb_zone != NULL) {
4694                 alloc_flags = CAM_CCB_FROM_UMA;
4695                 new_ccb = uma_zalloc(periph->ccb_zone, M_ZERO|M_NOWAIT);
4696         } else {
4697                 alloc_flags = 0;
4698                 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4699         }
4700         if (new_ccb == NULL)
4701                 return (NULL);
4702         new_ccb->ccb_h.alloc_flags = alloc_flags;
4703         periph->periph_allocated++;
4704         cam_ccbq_take_opening(&periph->path->device->ccbq);
4705         return (new_ccb);
4706 }
4707
4708 static union ccb *
4709 xpt_get_ccb(struct cam_periph *periph)
4710 {
4711         union ccb *new_ccb;
4712         int alloc_flags;
4713
4714         cam_periph_unlock(periph);
4715         if (periph->ccb_zone != NULL) {
4716                 alloc_flags = CAM_CCB_FROM_UMA;
4717                 new_ccb = uma_zalloc(periph->ccb_zone, M_ZERO|M_WAITOK);
4718         } else {
4719                 alloc_flags = 0;
4720                 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4721         }
4722         new_ccb->ccb_h.alloc_flags = alloc_flags;
4723         cam_periph_lock(periph);
4724         periph->periph_allocated++;
4725         cam_ccbq_take_opening(&periph->path->device->ccbq);
4726         return (new_ccb);
4727 }
4728
4729 union ccb *
4730 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4731 {
4732         struct ccb_hdr *ccb_h;
4733
4734         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4735         cam_periph_assert(periph, MA_OWNED);
4736         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4737             ccb_h->pinfo.priority != priority) {
4738                 if (priority < periph->immediate_priority) {
4739                         periph->immediate_priority = priority;
4740                         xpt_run_allocq(periph, 0);
4741                 } else
4742                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4743                             "cgticb", 0);
4744         }
4745         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4746         return ((union ccb *)ccb_h);
4747 }
4748
4749 static void
4750 xpt_acquire_bus(struct cam_eb *bus)
4751 {
4752
4753         xpt_lock_buses();
4754         bus->refcount++;
4755         xpt_unlock_buses();
4756 }
4757
4758 static void
4759 xpt_release_bus(struct cam_eb *bus)
4760 {
4761
4762         xpt_lock_buses();
4763         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4764         if (--bus->refcount > 0) {
4765                 xpt_unlock_buses();
4766                 return;
4767         }
4768         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4769         xsoftc.bus_generation++;
4770         xpt_unlock_buses();
4771         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4772             ("destroying bus, but target list is not empty"));
4773         cam_sim_release(bus->sim);
4774         mtx_destroy(&bus->eb_mtx);
4775         free(bus, M_CAMXPT);
4776 }
4777
4778 static struct cam_et *
4779 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4780 {
4781         struct cam_et *cur_target, *target;
4782
4783         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4784         mtx_assert(&bus->eb_mtx, MA_OWNED);
4785         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4786                                          M_NOWAIT|M_ZERO);
4787         if (target == NULL)
4788                 return (NULL);
4789
4790         TAILQ_INIT(&target->ed_entries);
4791         target->bus = bus;
4792         target->target_id = target_id;
4793         target->refcount = 1;
4794         target->generation = 0;
4795         target->luns = NULL;
4796         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4797         timevalclear(&target->last_reset);
4798         /*
4799          * Hold a reference to our parent bus so it
4800          * will not go away before we do.
4801          */
4802         bus->refcount++;
4803
4804         /* Insertion sort into our bus's target list */
4805         cur_target = TAILQ_FIRST(&bus->et_entries);
4806         while (cur_target != NULL && cur_target->target_id < target_id)
4807                 cur_target = TAILQ_NEXT(cur_target, links);
4808         if (cur_target != NULL) {
4809                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4810         } else {
4811                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4812         }
4813         bus->generation++;
4814         return (target);
4815 }
4816
4817 static void
4818 xpt_acquire_target(struct cam_et *target)
4819 {
4820         struct cam_eb *bus = target->bus;
4821
4822         mtx_lock(&bus->eb_mtx);
4823         target->refcount++;
4824         mtx_unlock(&bus->eb_mtx);
4825 }
4826
4827 static void
4828 xpt_release_target(struct cam_et *target)
4829 {
4830         struct cam_eb *bus = target->bus;
4831
4832         mtx_lock(&bus->eb_mtx);
4833         if (--target->refcount > 0) {
4834                 mtx_unlock(&bus->eb_mtx);
4835                 return;
4836         }
4837         TAILQ_REMOVE(&bus->et_entries, target, links);
4838         bus->generation++;
4839         mtx_unlock(&bus->eb_mtx);
4840         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4841             ("destroying target, but device list is not empty"));
4842         xpt_release_bus(bus);
4843         mtx_destroy(&target->luns_mtx);
4844         if (target->luns)
4845                 free(target->luns, M_CAMXPT);
4846         free(target, M_CAMXPT);
4847 }
4848
4849 static struct cam_ed *
4850 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4851                          lun_id_t lun_id)
4852 {
4853         struct cam_ed *device;
4854
4855         device = xpt_alloc_device(bus, target, lun_id);
4856         if (device == NULL)
4857                 return (NULL);
4858
4859         device->mintags = 1;
4860         device->maxtags = 1;
4861         return (device);
4862 }
4863
4864 static void
4865 xpt_destroy_device(void *context, int pending)
4866 {
4867         struct cam_ed   *device = context;
4868
4869         mtx_lock(&device->device_mtx);
4870         mtx_destroy(&device->device_mtx);
4871         free(device, M_CAMDEV);
4872 }
4873
4874 struct cam_ed *
4875 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4876 {
4877         struct cam_ed   *cur_device, *device;
4878         struct cam_devq *devq;
4879         cam_status status;
4880
4881         mtx_assert(&bus->eb_mtx, MA_OWNED);
4882         /* Make space for us in the device queue on our bus */
4883         devq = bus->sim->devq;
4884         mtx_lock(&devq->send_mtx);
4885         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4886         mtx_unlock(&devq->send_mtx);
4887         if (status != CAM_REQ_CMP)
4888                 return (NULL);
4889
4890         device = (struct cam_ed *)malloc(sizeof(*device),
4891                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4892         if (device == NULL)
4893                 return (NULL);
4894
4895         cam_init_pinfo(&device->devq_entry);
4896         device->target = target;
4897         device->lun_id = lun_id;
4898         device->sim = bus->sim;
4899         if (cam_ccbq_init(&device->ccbq,
4900                           bus->sim->max_dev_openings) != 0) {
4901                 free(device, M_CAMDEV);
4902                 return (NULL);
4903         }
4904         SLIST_INIT(&device->asyncs);
4905         SLIST_INIT(&device->periphs);
4906         device->generation = 0;
4907         device->flags = CAM_DEV_UNCONFIGURED;
4908         device->tag_delay_count = 0;
4909         device->tag_saved_openings = 0;
4910         device->refcount = 1;
4911         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4912         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4913         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4914         /*
4915          * Hold a reference to our parent bus so it
4916          * will not go away before we do.
4917          */
4918         target->refcount++;
4919
4920         cur_device = TAILQ_FIRST(&target->ed_entries);
4921         while (cur_device != NULL && cur_device->lun_id < lun_id)
4922                 cur_device = TAILQ_NEXT(cur_device, links);
4923         if (cur_device != NULL)
4924                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4925         else
4926                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4927         target->generation++;
4928         return (device);
4929 }
4930
4931 void
4932 xpt_acquire_device(struct cam_ed *device)
4933 {
4934         struct cam_eb *bus = device->target->bus;
4935
4936         mtx_lock(&bus->eb_mtx);
4937         device->refcount++;
4938         mtx_unlock(&bus->eb_mtx);
4939 }
4940
4941 void
4942 xpt_release_device(struct cam_ed *device)
4943 {
4944         struct cam_eb *bus = device->target->bus;
4945         struct cam_devq *devq;
4946
4947         mtx_lock(&bus->eb_mtx);
4948         if (--device->refcount > 0) {
4949                 mtx_unlock(&bus->eb_mtx);
4950                 return;
4951         }
4952
4953         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4954         device->target->generation++;
4955         mtx_unlock(&bus->eb_mtx);
4956
4957         /* Release our slot in the devq */
4958         devq = bus->sim->devq;
4959         mtx_lock(&devq->send_mtx);
4960         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4961
4962         KASSERT(SLIST_EMPTY(&device->periphs),
4963             ("destroying device, but periphs list is not empty"));
4964         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4965             ("destroying device while still queued for ccbs"));
4966
4967         /* The send_mtx must be held when accessing the callout */
4968         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4969                 callout_stop(&device->callout);
4970
4971         mtx_unlock(&devq->send_mtx);
4972
4973         xpt_release_target(device->target);
4974
4975         cam_ccbq_fini(&device->ccbq);
4976         /*
4977          * Free allocated memory.  free(9) does nothing if the
4978          * supplied pointer is NULL, so it is safe to call without
4979          * checking.
4980          */
4981         free(device->supported_vpds, M_CAMXPT);
4982         free(device->device_id, M_CAMXPT);
4983         free(device->ext_inq, M_CAMXPT);
4984         free(device->physpath, M_CAMXPT);
4985         free(device->rcap_buf, M_CAMXPT);
4986         free(device->serial_num, M_CAMXPT);
4987         free(device->nvme_data, M_CAMXPT);
4988         free(device->nvme_cdata, M_CAMXPT);
4989         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4990 }
4991
4992 u_int32_t
4993 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4994 {
4995         int     result;
4996         struct  cam_ed *dev;
4997
4998         dev = path->device;
4999         mtx_lock(&dev->sim->devq->send_mtx);
5000         result = cam_ccbq_resize(&dev->ccbq, newopenings);
5001         mtx_unlock(&dev->sim->devq->send_mtx);
5002         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5003          || (dev->inq_flags & SID_CmdQue) != 0)
5004                 dev->tag_saved_openings = newopenings;
5005         return (result);
5006 }
5007
5008 static struct cam_eb *
5009 xpt_find_bus(path_id_t path_id)
5010 {
5011         struct cam_eb *bus;
5012
5013         xpt_lock_buses();
5014         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
5015              bus != NULL;
5016              bus = TAILQ_NEXT(bus, links)) {
5017                 if (bus->path_id == path_id) {
5018                         bus->refcount++;
5019                         break;
5020                 }
5021         }
5022         xpt_unlock_buses();
5023         return (bus);
5024 }
5025
5026 static struct cam_et *
5027 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
5028 {
5029         struct cam_et *target;
5030
5031         mtx_assert(&bus->eb_mtx, MA_OWNED);
5032         for (target = TAILQ_FIRST(&bus->et_entries);
5033              target != NULL;
5034              target = TAILQ_NEXT(target, links)) {
5035                 if (target->target_id == target_id) {
5036                         target->refcount++;
5037                         break;
5038                 }
5039         }
5040         return (target);
5041 }
5042
5043 static struct cam_ed *
5044 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5045 {
5046         struct cam_ed *device;
5047
5048         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
5049         for (device = TAILQ_FIRST(&target->ed_entries);
5050              device != NULL;
5051              device = TAILQ_NEXT(device, links)) {
5052                 if (device->lun_id == lun_id) {
5053                         device->refcount++;
5054                         break;
5055                 }
5056         }
5057         return (device);
5058 }
5059
5060 void
5061 xpt_start_tags(struct cam_path *path)
5062 {
5063         struct ccb_relsim crs;
5064         struct cam_ed *device;
5065         struct cam_sim *sim;
5066         int    newopenings;
5067
5068         device = path->device;
5069         sim = path->bus->sim;
5070         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5071         xpt_freeze_devq(path, /*count*/1);
5072         device->inq_flags |= SID_CmdQue;
5073         if (device->tag_saved_openings != 0)
5074                 newopenings = device->tag_saved_openings;
5075         else
5076                 newopenings = min(device->maxtags,
5077                                   sim->max_tagged_dev_openings);
5078         xpt_dev_ccbq_resize(path, newopenings);
5079         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5080         memset(&crs, 0, sizeof(crs));
5081         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5082         crs.ccb_h.func_code = XPT_REL_SIMQ;
5083         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5084         crs.openings
5085             = crs.release_timeout
5086             = crs.qfrozen_cnt
5087             = 0;
5088         xpt_action((union ccb *)&crs);
5089 }
5090
5091 void
5092 xpt_stop_tags(struct cam_path *path)
5093 {
5094         struct ccb_relsim crs;
5095         struct cam_ed *device;
5096         struct cam_sim *sim;
5097
5098         device = path->device;
5099         sim = path->bus->sim;
5100         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5101         device->tag_delay_count = 0;
5102         xpt_freeze_devq(path, /*count*/1);
5103         device->inq_flags &= ~SID_CmdQue;
5104         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
5105         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5106         memset(&crs, 0, sizeof(crs));
5107         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5108         crs.ccb_h.func_code = XPT_REL_SIMQ;
5109         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5110         crs.openings
5111             = crs.release_timeout
5112             = crs.qfrozen_cnt
5113             = 0;
5114         xpt_action((union ccb *)&crs);
5115 }
5116
5117 /*
5118  * Assume all possible buses are detected by this time, so allow boot
5119  * as soon as they all are scanned.
5120  */
5121 static void
5122 xpt_boot_delay(void *arg)
5123 {
5124
5125         xpt_release_boot();
5126 }
5127
5128 /*
5129  * Now that all config hooks have completed, start boot_delay timer,
5130  * waiting for possibly still undetected buses (USB) to appear.
5131  */
5132 static void
5133 xpt_ch_done(void *arg)
5134 {
5135
5136         callout_init(&xsoftc.boot_callout, 1);
5137         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5138             xpt_boot_delay, NULL, 0);
5139 }
5140 SYSINIT(xpt_hw_delay, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_ANY, xpt_ch_done, NULL);
5141
5142 /*
5143  * Now that interrupts are enabled, go find our devices
5144  */
5145 static void
5146 xpt_config(void *arg)
5147 {
5148         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
5149                 printf("xpt_config: failed to create taskqueue thread.\n");
5150
5151         /* Setup debugging path */
5152         if (cam_dflags != CAM_DEBUG_NONE) {
5153                 if (xpt_create_path(&cam_dpath, NULL,
5154                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
5155                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
5156                         printf("xpt_config: xpt_create_path() failed for debug"
5157                                " target %d:%d:%d, debugging disabled\n",
5158                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
5159                         cam_dflags = CAM_DEBUG_NONE;
5160                 }
5161         } else
5162                 cam_dpath = NULL;
5163
5164         periphdriver_init(1);
5165         xpt_hold_boot();
5166
5167         /* Fire up rescan thread. */
5168         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5169             "cam", "scanner")) {
5170                 printf("xpt_config: failed to create rescan thread.\n");
5171         }
5172 }
5173
5174 void
5175 xpt_hold_boot_locked(void)
5176 {
5177
5178         if (xsoftc.buses_to_config++ == 0)
5179                 root_mount_hold_token("CAM", &xsoftc.xpt_rootmount);
5180 }
5181
5182 void
5183 xpt_hold_boot(void)
5184 {
5185
5186         xpt_lock_buses();
5187         xpt_hold_boot_locked();
5188         xpt_unlock_buses();
5189 }
5190
5191 void
5192 xpt_release_boot(void)
5193 {
5194
5195         xpt_lock_buses();
5196         if (--xsoftc.buses_to_config == 0) {
5197                 if (xsoftc.buses_config_done == 0) {
5198                         xsoftc.buses_config_done = 1;
5199                         xsoftc.buses_to_config++;
5200                         TASK_INIT(&xsoftc.boot_task, 0, xpt_finishconfig_task,
5201                             NULL);
5202                         taskqueue_enqueue(taskqueue_thread, &xsoftc.boot_task);
5203                 } else
5204                         root_mount_rel(&xsoftc.xpt_rootmount);
5205         }
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         xpt_release_boot();
5245 }
5246
5247 cam_status
5248 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5249                    struct cam_path *path)
5250 {
5251         struct ccb_setasync csa;
5252         cam_status status;
5253         int xptpath = 0;
5254
5255         if (path == NULL) {
5256                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5257                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5258                 if (status != CAM_REQ_CMP)
5259                         return (status);
5260                 xpt_path_lock(path);
5261                 xptpath = 1;
5262         }
5263
5264         memset(&csa, 0, sizeof(csa));
5265         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5266         csa.ccb_h.func_code = XPT_SASYNC_CB;
5267         csa.event_enable = event;
5268         csa.callback = cbfunc;
5269         csa.callback_arg = cbarg;
5270         xpt_action((union ccb *)&csa);
5271         status = csa.ccb_h.status;
5272
5273         CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5274             ("xpt_register_async: func %p\n", cbfunc));
5275
5276         if (xptpath) {
5277                 xpt_path_unlock(path);
5278                 xpt_free_path(path);
5279         }
5280
5281         if ((status == CAM_REQ_CMP) &&
5282             (csa.event_enable & AC_FOUND_DEVICE)) {
5283                 /*
5284                  * Get this peripheral up to date with all
5285                  * the currently existing devices.
5286                  */
5287                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5288         }
5289         if ((status == CAM_REQ_CMP) &&
5290             (csa.event_enable & AC_PATH_REGISTERED)) {
5291                 /*
5292                  * Get this peripheral up to date with all
5293                  * the currently existing buses.
5294                  */
5295                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5296         }
5297
5298         return (status);
5299 }
5300
5301 static void
5302 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5303 {
5304         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5305
5306         switch (work_ccb->ccb_h.func_code) {
5307         /* Common cases first */
5308         case XPT_PATH_INQ:              /* Path routing inquiry */
5309         {
5310                 struct ccb_pathinq *cpi;
5311
5312                 cpi = &work_ccb->cpi;
5313                 cpi->version_num = 1; /* XXX??? */
5314                 cpi->hba_inquiry = 0;
5315                 cpi->target_sprt = 0;
5316                 cpi->hba_misc = 0;
5317                 cpi->hba_eng_cnt = 0;
5318                 cpi->max_target = 0;
5319                 cpi->max_lun = 0;
5320                 cpi->initiator_id = 0;
5321                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5322                 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5323                 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5324                 cpi->unit_number = sim->unit_number;
5325                 cpi->bus_id = sim->bus_id;
5326                 cpi->base_transfer_speed = 0;
5327                 cpi->protocol = PROTO_UNSPECIFIED;
5328                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5329                 cpi->transport = XPORT_UNSPECIFIED;
5330                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5331                 cpi->ccb_h.status = CAM_REQ_CMP;
5332                 break;
5333         }
5334         default:
5335                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5336                 break;
5337         }
5338         xpt_done(work_ccb);
5339 }
5340
5341 /*
5342  * The xpt as a "controller" has no interrupt sources, so polling
5343  * is a no-op.
5344  */
5345 static void
5346 xptpoll(struct cam_sim *sim)
5347 {
5348 }
5349
5350 void
5351 xpt_lock_buses(void)
5352 {
5353         mtx_lock(&xsoftc.xpt_topo_lock);
5354 }
5355
5356 void
5357 xpt_unlock_buses(void)
5358 {
5359         mtx_unlock(&xsoftc.xpt_topo_lock);
5360 }
5361
5362 struct mtx *
5363 xpt_path_mtx(struct cam_path *path)
5364 {
5365
5366         return (&path->device->device_mtx);
5367 }
5368
5369 static void
5370 xpt_done_process(struct ccb_hdr *ccb_h)
5371 {
5372         struct cam_sim *sim = NULL;
5373         struct cam_devq *devq = NULL;
5374         struct mtx *mtx = NULL;
5375
5376 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5377         struct ccb_scsiio *csio;
5378
5379         if (ccb_h->func_code == XPT_SCSI_IO) {
5380                 csio = &((union ccb *)ccb_h)->csio;
5381                 if (csio->bio != NULL)
5382                         biotrack(csio->bio, __func__);
5383         }
5384 #endif
5385
5386         if (ccb_h->flags & CAM_HIGH_POWER) {
5387                 struct highpowerlist    *hphead;
5388                 struct cam_ed           *device;
5389
5390                 mtx_lock(&xsoftc.xpt_highpower_lock);
5391                 hphead = &xsoftc.highpowerq;
5392
5393                 device = STAILQ_FIRST(hphead);
5394
5395                 /*
5396                  * Increment the count since this command is done.
5397                  */
5398                 xsoftc.num_highpower++;
5399
5400                 /*
5401                  * Any high powered commands queued up?
5402                  */
5403                 if (device != NULL) {
5404                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5405                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5406
5407                         mtx_lock(&device->sim->devq->send_mtx);
5408                         xpt_release_devq_device(device,
5409                                          /*count*/1, /*runqueue*/TRUE);
5410                         mtx_unlock(&device->sim->devq->send_mtx);
5411                 } else
5412                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5413         }
5414
5415         /*
5416          * Insulate against a race where the periph is destroyed but CCBs are
5417          * still not all processed. This shouldn't happen, but allows us better
5418          * bug diagnostic when it does.
5419          */
5420         if (ccb_h->path->bus)
5421                 sim = ccb_h->path->bus->sim;
5422
5423         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5424                 KASSERT(sim, ("sim missing for CAM_RELEASE_SIMQ request"));
5425                 xpt_release_simq(sim, /*run_queue*/FALSE);
5426                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5427         }
5428
5429         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5430          && (ccb_h->status & CAM_DEV_QFRZN)) {
5431                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5432                 ccb_h->status &= ~CAM_DEV_QFRZN;
5433         }
5434
5435         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5436                 struct cam_ed *dev = ccb_h->path->device;
5437
5438                 if (sim)
5439                         devq = sim->devq;
5440                 KASSERT(devq, ("Periph disappeared with CCB %p %s request pending.",
5441                         ccb_h, xpt_action_name(ccb_h->func_code)));
5442
5443                 mtx_lock(&devq->send_mtx);
5444                 devq->send_active--;
5445                 devq->send_openings++;
5446                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5447
5448                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5449                   && (dev->ccbq.dev_active == 0))) {
5450                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5451                         xpt_release_devq_device(dev, /*count*/1,
5452                                          /*run_queue*/FALSE);
5453                 }
5454
5455                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5456                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5457                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5458                         xpt_release_devq_device(dev, /*count*/1,
5459                                          /*run_queue*/FALSE);
5460                 }
5461
5462                 if (!device_is_queued(dev))
5463                         (void)xpt_schedule_devq(devq, dev);
5464                 xpt_run_devq(devq);
5465                 mtx_unlock(&devq->send_mtx);
5466
5467                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5468                         mtx = xpt_path_mtx(ccb_h->path);
5469                         mtx_lock(mtx);
5470
5471                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5472                          && (--dev->tag_delay_count == 0))
5473                                 xpt_start_tags(ccb_h->path);
5474                 }
5475         }
5476
5477         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5478                 if (mtx == NULL) {
5479                         mtx = xpt_path_mtx(ccb_h->path);
5480                         mtx_lock(mtx);
5481                 }
5482         } else {
5483                 if (mtx != NULL) {
5484                         mtx_unlock(mtx);
5485                         mtx = NULL;
5486                 }
5487         }
5488
5489         /* Call the peripheral driver's callback */
5490         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5491         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5492         if (mtx != NULL)
5493                 mtx_unlock(mtx);
5494 }
5495
5496 /*
5497  * Parameterize instead and use xpt_done_td?
5498  */
5499 static void
5500 xpt_async_td(void *arg)
5501 {
5502         struct cam_doneq *queue = arg;
5503         struct ccb_hdr *ccb_h;
5504         STAILQ_HEAD(, ccb_hdr)  doneq;
5505
5506         STAILQ_INIT(&doneq);
5507         mtx_lock(&queue->cam_doneq_mtx);
5508         while (1) {
5509                 while (STAILQ_EMPTY(&queue->cam_doneq))
5510                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5511                             PRIBIO, "-", 0);
5512                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5513                 mtx_unlock(&queue->cam_doneq_mtx);
5514
5515                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5516                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5517                         xpt_done_process(ccb_h);
5518                 }
5519
5520                 mtx_lock(&queue->cam_doneq_mtx);
5521         }
5522 }
5523
5524 void
5525 xpt_done_td(void *arg)
5526 {
5527         struct cam_doneq *queue = arg;
5528         struct ccb_hdr *ccb_h;
5529         STAILQ_HEAD(, ccb_hdr)  doneq;
5530
5531         STAILQ_INIT(&doneq);
5532         mtx_lock(&queue->cam_doneq_mtx);
5533         while (1) {
5534                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5535                         queue->cam_doneq_sleep = 1;
5536                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5537                             PRIBIO, "-", 0);
5538                         queue->cam_doneq_sleep = 0;
5539                 }
5540                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5541                 mtx_unlock(&queue->cam_doneq_mtx);
5542
5543                 THREAD_NO_SLEEPING();
5544                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5545                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5546                         xpt_done_process(ccb_h);
5547                 }
5548                 THREAD_SLEEPING_OK();
5549
5550                 mtx_lock(&queue->cam_doneq_mtx);
5551         }
5552 }
5553
5554 static void
5555 camisr_runqueue(void)
5556 {
5557         struct  ccb_hdr *ccb_h;
5558         struct cam_doneq *queue;
5559         int i;
5560
5561         /* Process global queues. */
5562         for (i = 0; i < cam_num_doneqs; i++) {
5563                 queue = &cam_doneqs[i];
5564                 mtx_lock(&queue->cam_doneq_mtx);
5565                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5566                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5567                         mtx_unlock(&queue->cam_doneq_mtx);
5568                         xpt_done_process(ccb_h);
5569                         mtx_lock(&queue->cam_doneq_mtx);
5570                 }
5571                 mtx_unlock(&queue->cam_doneq_mtx);
5572         }
5573 }
5574
5575 struct kv
5576 {
5577         uint32_t v;
5578         const char *name;
5579 };
5580
5581 static struct kv map[] = {
5582         { XPT_NOOP, "XPT_NOOP" },
5583         { XPT_SCSI_IO, "XPT_SCSI_IO" },
5584         { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5585         { XPT_GDEVLIST, "XPT_GDEVLIST" },
5586         { XPT_PATH_INQ, "XPT_PATH_INQ" },
5587         { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5588         { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5589         { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5590         { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5591         { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5592         { XPT_DEBUG, "XPT_DEBUG" },
5593         { XPT_PATH_STATS, "XPT_PATH_STATS" },
5594         { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5595         { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5596         { XPT_ASYNC, "XPT_ASYNC" },
5597         { XPT_ABORT, "XPT_ABORT" },
5598         { XPT_RESET_BUS, "XPT_RESET_BUS" },
5599         { XPT_RESET_DEV, "XPT_RESET_DEV" },
5600         { XPT_TERM_IO, "XPT_TERM_IO" },
5601         { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5602         { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5603         { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5604         { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5605         { XPT_ATA_IO, "XPT_ATA_IO" },
5606         { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5607         { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5608         { XPT_NVME_IO, "XPT_NVME_IO" },
5609         { XPT_MMC_IO, "XPT_MMC_IO" },
5610         { XPT_SMP_IO, "XPT_SMP_IO" },
5611         { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5612         { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" },
5613         { XPT_ENG_INQ, "XPT_ENG_INQ" },
5614         { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5615         { XPT_EN_LUN, "XPT_EN_LUN" },
5616         { XPT_TARGET_IO, "XPT_TARGET_IO" },
5617         { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5618         { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5619         { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5620         { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5621         { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5622         { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5623         { 0, 0 }
5624 };
5625
5626 const char *
5627 xpt_action_name(uint32_t action)
5628 {
5629         static char buffer[32]; /* Only for unknown messages -- racy */
5630         struct kv *walker = map;
5631
5632         while (walker->name != NULL) {
5633                 if (walker->v == action)
5634                         return (walker->name);
5635                 walker++;
5636         }
5637
5638         snprintf(buffer, sizeof(buffer), "%#x", action);
5639         return (buffer);
5640 }