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 ((error = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 934                 printf("xpt_init: xpt_bus_register failed with errno %d,"
 935                        " failing attach\n", error);
 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                 struct device_match_pattern *dp = &patterns[i].pattern.device_pattern;
1390                 struct periph_match_pattern *pp = &patterns[i].pattern.periph_pattern;
1391
1392                 /*
1393                  * If the pattern in question isn't for a bus node, we
1394                  * aren't interested.  However, we do indicate to the
1395                  * calling routine that we should continue descending the
1396                  * tree, since the user wants to match against lower-level
1397                  * EDT elements.
1398                  */
1399                 if (patterns[i].type == DEV_MATCH_DEVICE &&
1400                     (dp->flags & DEV_MATCH_PATH) != 0 &&
1401                     dp->path_id != bus->path_id)
1402                         continue;
1403                 if (patterns[i].type == DEV_MATCH_PERIPH &&
1404                     (pp->flags & PERIPH_MATCH_PATH) != 0 &&
1405                     pp->path_id != bus->path_id)
1406                         continue;
1407                 if (patterns[i].type != DEV_MATCH_BUS) {
1408                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1409                                 retval |= DM_RET_DESCEND;
1410                         continue;
1411                 }
1412
1413                 cur_pattern = &patterns[i].pattern.bus_pattern;
1414
1415                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1416                  && (cur_pattern->path_id != bus->path_id))
1417                         continue;
1418
1419                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1420                  && (cur_pattern->bus_id != bus->sim->bus_id))
1421                         continue;
1422
1423                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1424                  && (cur_pattern->unit_number != bus->sim->unit_number))
1425                         continue;
1426
1427                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1428                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1429                              DEV_IDLEN) != 0))
1430                         continue;
1431
1432                 /*
1433                  * If we get to this point, the user definitely wants
1434                  * information on this bus.  So tell the caller to copy the
1435                  * data out.
1436                  */
1437                 retval |= DM_RET_COPY;
1438
1439                 /*
1440                  * If the return action has been set to descend, then we
1441                  * know that we've already seen a non-bus matching
1442                  * expression, therefore we need to further descend the tree.
1443                  * This won't change by continuing around the loop, so we
1444                  * go ahead and return.  If we haven't seen a non-bus
1445                  * matching expression, we keep going around the loop until
1446                  * we exhaust the matching expressions.  We'll set the stop
1447                  * flag once we fall out of the loop.
1448                  */
1449                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1450                         return(retval);
1451         }
1452
1453         /*
1454          * If the return action hasn't been set to descend yet, that means
1455          * we haven't seen anything other than bus matching patterns.  So
1456          * tell the caller to stop descending the tree -- the user doesn't
1457          * want to match against lower level tree elements.
1458          */
1459         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1460                 retval |= DM_RET_STOP;
1461
1462         return(retval);
1463 }
1464
1465 static dev_match_ret
1466 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1467                struct cam_ed *device)
1468 {
1469         dev_match_ret retval;
1470         u_int i;
1471
1472         retval = DM_RET_NONE;
1473
1474         /*
1475          * If we aren't given something to match against, that's an error.
1476          */
1477         if (device == NULL)
1478                 return(DM_RET_ERROR);
1479
1480         /*
1481          * If there are no match entries, then this device matches no
1482          * matter what.
1483          */
1484         if ((patterns == NULL) || (num_patterns == 0))
1485                 return(DM_RET_DESCEND | DM_RET_COPY);
1486
1487         for (i = 0; i < num_patterns; i++) {
1488                 struct device_match_pattern *cur_pattern;
1489                 struct scsi_vpd_device_id *device_id_page;
1490                 struct periph_match_pattern *pp = &patterns[i].pattern.periph_pattern;
1491
1492                 /*
1493                  * If the pattern in question isn't for a device node, we
1494                  * aren't interested.
1495                  */
1496                 if (patterns[i].type == DEV_MATCH_PERIPH &&
1497                     (pp->flags & PERIPH_MATCH_TARGET) != 0 &&
1498                     pp->target_id != device->target->target_id)
1499                         continue;
1500                 if (patterns[i].type == DEV_MATCH_PERIPH &&
1501                     (pp->flags & PERIPH_MATCH_LUN) != 0 &&
1502                     pp->target_lun != device->lun_id)
1503                         continue;
1504                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1505                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1506                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1507                                 retval |= DM_RET_DESCEND;
1508                         continue;
1509                 }
1510
1511                 cur_pattern = &patterns[i].pattern.device_pattern;
1512
1513                 /* Error out if mutually exclusive options are specified. */
1514                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1515                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1516                         return(DM_RET_ERROR);
1517
1518                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1519                  && (cur_pattern->path_id != device->target->bus->path_id))
1520                         continue;
1521
1522                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1523                  && (cur_pattern->target_id != device->target->target_id))
1524                         continue;
1525
1526                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1527                  && (cur_pattern->target_lun != device->lun_id))
1528                         continue;
1529
1530                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1531                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1532                                     (caddr_t)&cur_pattern->data.inq_pat,
1533                                     1, sizeof(cur_pattern->data.inq_pat),
1534                                     scsi_static_inquiry_match) == NULL))
1535                         continue;
1536
1537                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1538                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1539                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1540                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1541                                       device->device_id_len
1542                                     - SVPD_DEVICE_ID_HDR_LEN,
1543                                       cur_pattern->data.devid_pat.id,
1544                                       cur_pattern->data.devid_pat.id_len) != 0))
1545                         continue;
1546
1547                 /*
1548                  * If we get to this point, the user definitely wants
1549                  * information on this device.  So tell the caller to copy
1550                  * the data out.
1551                  */
1552                 retval |= DM_RET_COPY;
1553
1554                 /*
1555                  * If the return action has been set to descend, then we
1556                  * know that we've already seen a peripheral matching
1557                  * expression, therefore we need to further descend the tree.
1558                  * This won't change by continuing around the loop, so we
1559                  * go ahead and return.  If we haven't seen a peripheral
1560                  * matching expression, we keep going around the loop until
1561                  * we exhaust the matching expressions.  We'll set the stop
1562                  * flag once we fall out of the loop.
1563                  */
1564                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1565                         return(retval);
1566         }
1567
1568         /*
1569          * If the return action hasn't been set to descend yet, that means
1570          * we haven't seen any peripheral matching patterns.  So tell the
1571          * caller to stop descending the tree -- the user doesn't want to
1572          * match against lower level tree elements.
1573          */
1574         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1575                 retval |= DM_RET_STOP;
1576
1577         return(retval);
1578 }
1579
1580 /*
1581  * Match a single peripheral against any number of match patterns.
1582  */
1583 static dev_match_ret
1584 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1585                struct cam_periph *periph)
1586 {
1587         dev_match_ret retval;
1588         u_int i;
1589
1590         /*
1591          * If we aren't given something to match against, that's an error.
1592          */
1593         if (periph == NULL)
1594                 return(DM_RET_ERROR);
1595
1596         /*
1597          * If there are no match entries, then this peripheral matches no
1598          * matter what.
1599          */
1600         if ((patterns == NULL) || (num_patterns == 0))
1601                 return(DM_RET_STOP | DM_RET_COPY);
1602
1603         /*
1604          * There aren't any nodes below a peripheral node, so there's no
1605          * reason to descend the tree any further.
1606          */
1607         retval = DM_RET_STOP;
1608
1609         for (i = 0; i < num_patterns; i++) {
1610                 struct periph_match_pattern *cur_pattern;
1611
1612                 /*
1613                  * If the pattern in question isn't for a peripheral, we
1614                  * aren't interested.
1615                  */
1616                 if (patterns[i].type != DEV_MATCH_PERIPH)
1617                         continue;
1618
1619                 cur_pattern = &patterns[i].pattern.periph_pattern;
1620
1621                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1622                  && (cur_pattern->path_id != periph->path->bus->path_id))
1623                         continue;
1624
1625                 /*
1626                  * For the target and lun id's, we have to make sure the
1627                  * target and lun pointers aren't NULL.  The xpt peripheral
1628                  * has a wildcard target and device.
1629                  */
1630                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1631                  && ((periph->path->target == NULL)
1632                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1633                         continue;
1634
1635                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1636                  && ((periph->path->device == NULL)
1637                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1638                         continue;
1639
1640                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1641                  && (cur_pattern->unit_number != periph->unit_number))
1642                         continue;
1643
1644                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1645                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1646                              DEV_IDLEN) != 0))
1647                         continue;
1648
1649                 /*
1650                  * If we get to this point, the user definitely wants
1651                  * information on this peripheral.  So tell the caller to
1652                  * copy the data out.
1653                  */
1654                 retval |= DM_RET_COPY;
1655
1656                 /*
1657                  * The return action has already been set to stop, since
1658                  * peripherals don't have any nodes below them in the EDT.
1659                  */
1660                 return(retval);
1661         }
1662
1663         /*
1664          * If we get to this point, the peripheral that was passed in
1665          * doesn't match any of the patterns.
1666          */
1667         return(retval);
1668 }
1669
1670 static int
1671 xptedtbusfunc(struct cam_eb *bus, void *arg)
1672 {
1673         struct ccb_dev_match *cdm;
1674         struct cam_et *target;
1675         dev_match_ret retval;
1676
1677         cdm = (struct ccb_dev_match *)arg;
1678
1679         /*
1680          * If our position is for something deeper in the tree, that means
1681          * that we've already seen this node.  So, we keep going down.
1682          */
1683         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1684          && (cdm->pos.cookie.bus == bus)
1685          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1686          && (cdm->pos.cookie.target != NULL))
1687                 retval = DM_RET_DESCEND;
1688         else
1689                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1690
1691         /*
1692          * If we got an error, bail out of the search.
1693          */
1694         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1695                 cdm->status = CAM_DEV_MATCH_ERROR;
1696                 return(0);
1697         }
1698
1699         /*
1700          * If the copy flag is set, copy this bus out.
1701          */
1702         if (retval & DM_RET_COPY) {
1703                 int spaceleft, j;
1704
1705                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1706                         sizeof(struct dev_match_result));
1707
1708                 /*
1709                  * If we don't have enough space to put in another
1710                  * match result, save our position and tell the
1711                  * user there are more devices to check.
1712                  */
1713                 if (spaceleft < sizeof(struct dev_match_result)) {
1714                         bzero(&cdm->pos, sizeof(cdm->pos));
1715                         cdm->pos.position_type =
1716                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1717
1718                         cdm->pos.cookie.bus = bus;
1719                         cdm->pos.generations[CAM_BUS_GENERATION]=
1720                                 xsoftc.bus_generation;
1721                         cdm->status = CAM_DEV_MATCH_MORE;
1722                         return(0);
1723                 }
1724                 j = cdm->num_matches;
1725                 cdm->num_matches++;
1726                 cdm->matches[j].type = DEV_MATCH_BUS;
1727                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1728                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1729                 cdm->matches[j].result.bus_result.unit_number =
1730                         bus->sim->unit_number;
1731                 strlcpy(cdm->matches[j].result.bus_result.dev_name,
1732                         bus->sim->sim_name,
1733                         sizeof(cdm->matches[j].result.bus_result.dev_name));
1734         }
1735
1736         /*
1737          * If the user is only interested in buses, there's no
1738          * reason to descend to the next level in the tree.
1739          */
1740         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1741                 return(1);
1742
1743         /*
1744          * If there is a target generation recorded, check it to
1745          * make sure the target list hasn't changed.
1746          */
1747         mtx_lock(&bus->eb_mtx);
1748         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1749          && (cdm->pos.cookie.bus == bus)
1750          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1751          && (cdm->pos.cookie.target != NULL)) {
1752                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1753                     bus->generation)) {
1754                         mtx_unlock(&bus->eb_mtx);
1755                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1756                         return (0);
1757                 }
1758                 target = (struct cam_et *)cdm->pos.cookie.target;
1759                 target->refcount++;
1760         } else
1761                 target = NULL;
1762         mtx_unlock(&bus->eb_mtx);
1763
1764         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1765 }
1766
1767 static int
1768 xptedttargetfunc(struct cam_et *target, void *arg)
1769 {
1770         struct ccb_dev_match *cdm;
1771         struct cam_eb *bus;
1772         struct cam_ed *device;
1773
1774         cdm = (struct ccb_dev_match *)arg;
1775         bus = target->bus;
1776
1777         /*
1778          * If there is a device list generation recorded, check it to
1779          * make sure the device list hasn't changed.
1780          */
1781         mtx_lock(&bus->eb_mtx);
1782         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1783          && (cdm->pos.cookie.bus == bus)
1784          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1785          && (cdm->pos.cookie.target == target)
1786          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1787          && (cdm->pos.cookie.device != NULL)) {
1788                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1789                     target->generation) {
1790                         mtx_unlock(&bus->eb_mtx);
1791                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1792                         return(0);
1793                 }
1794                 device = (struct cam_ed *)cdm->pos.cookie.device;
1795                 device->refcount++;
1796         } else
1797                 device = NULL;
1798         mtx_unlock(&bus->eb_mtx);
1799
1800         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1801 }
1802
1803 static int
1804 xptedtdevicefunc(struct cam_ed *device, void *arg)
1805 {
1806         struct cam_eb *bus;
1807         struct cam_periph *periph;
1808         struct ccb_dev_match *cdm;
1809         dev_match_ret retval;
1810
1811         cdm = (struct ccb_dev_match *)arg;
1812         bus = device->target->bus;
1813
1814         /*
1815          * If our position is for something deeper in the tree, that means
1816          * that we've already seen this node.  So, we keep going down.
1817          */
1818         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1819          && (cdm->pos.cookie.device == device)
1820          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1821          && (cdm->pos.cookie.periph != NULL))
1822                 retval = DM_RET_DESCEND;
1823         else
1824                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1825                                         device);
1826
1827         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1828                 cdm->status = CAM_DEV_MATCH_ERROR;
1829                 return(0);
1830         }
1831
1832         /*
1833          * If the copy flag is set, copy this device out.
1834          */
1835         if (retval & DM_RET_COPY) {
1836                 int spaceleft, j;
1837
1838                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1839                         sizeof(struct dev_match_result));
1840
1841                 /*
1842                  * If we don't have enough space to put in another
1843                  * match result, save our position and tell the
1844                  * user there are more devices to check.
1845                  */
1846                 if (spaceleft < sizeof(struct dev_match_result)) {
1847                         bzero(&cdm->pos, sizeof(cdm->pos));
1848                         cdm->pos.position_type =
1849                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1850                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1851
1852                         cdm->pos.cookie.bus = device->target->bus;
1853                         cdm->pos.generations[CAM_BUS_GENERATION]=
1854                                 xsoftc.bus_generation;
1855                         cdm->pos.cookie.target = device->target;
1856                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1857                                 device->target->bus->generation;
1858                         cdm->pos.cookie.device = device;
1859                         cdm->pos.generations[CAM_DEV_GENERATION] =
1860                                 device->target->generation;
1861                         cdm->status = CAM_DEV_MATCH_MORE;
1862                         return(0);
1863                 }
1864                 j = cdm->num_matches;
1865                 cdm->num_matches++;
1866                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1867                 cdm->matches[j].result.device_result.path_id =
1868                         device->target->bus->path_id;
1869                 cdm->matches[j].result.device_result.target_id =
1870                         device->target->target_id;
1871                 cdm->matches[j].result.device_result.target_lun =
1872                         device->lun_id;
1873                 cdm->matches[j].result.device_result.protocol =
1874                         device->protocol;
1875                 bcopy(&device->inq_data,
1876                       &cdm->matches[j].result.device_result.inq_data,
1877                       sizeof(struct scsi_inquiry_data));
1878                 bcopy(&device->ident_data,
1879                       &cdm->matches[j].result.device_result.ident_data,
1880                       sizeof(struct ata_params));
1881
1882                 /* Let the user know whether this device is unconfigured */
1883                 if (device->flags & CAM_DEV_UNCONFIGURED)
1884                         cdm->matches[j].result.device_result.flags =
1885                                 DEV_RESULT_UNCONFIGURED;
1886                 else
1887                         cdm->matches[j].result.device_result.flags =
1888                                 DEV_RESULT_NOFLAG;
1889         }
1890
1891         /*
1892          * If the user isn't interested in peripherals, don't descend
1893          * the tree any further.
1894          */
1895         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1896                 return(1);
1897
1898         /*
1899          * If there is a peripheral list generation recorded, make sure
1900          * it hasn't changed.
1901          */
1902         xpt_lock_buses();
1903         mtx_lock(&bus->eb_mtx);
1904         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1905          && (cdm->pos.cookie.bus == bus)
1906          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1907          && (cdm->pos.cookie.target == device->target)
1908          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1909          && (cdm->pos.cookie.device == device)
1910          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1911          && (cdm->pos.cookie.periph != NULL)) {
1912                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1913                     device->generation) {
1914                         mtx_unlock(&bus->eb_mtx);
1915                         xpt_unlock_buses();
1916                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1917                         return(0);
1918                 }
1919                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1920                 periph->refcount++;
1921         } else
1922                 periph = NULL;
1923         mtx_unlock(&bus->eb_mtx);
1924         xpt_unlock_buses();
1925
1926         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1927 }
1928
1929 static int
1930 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1931 {
1932         struct ccb_dev_match *cdm;
1933         dev_match_ret retval;
1934
1935         cdm = (struct ccb_dev_match *)arg;
1936
1937         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1938
1939         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1940                 cdm->status = CAM_DEV_MATCH_ERROR;
1941                 return(0);
1942         }
1943
1944         /*
1945          * If the copy flag is set, copy this peripheral out.
1946          */
1947         if (retval & DM_RET_COPY) {
1948                 int spaceleft, j;
1949                 size_t l;
1950
1951                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1952                         sizeof(struct dev_match_result));
1953
1954                 /*
1955                  * If we don't have enough space to put in another
1956                  * match result, save our position and tell the
1957                  * user there are more devices to check.
1958                  */
1959                 if (spaceleft < sizeof(struct dev_match_result)) {
1960                         bzero(&cdm->pos, sizeof(cdm->pos));
1961                         cdm->pos.position_type =
1962                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1963                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1964                                 CAM_DEV_POS_PERIPH;
1965
1966                         cdm->pos.cookie.bus = periph->path->bus;
1967                         cdm->pos.generations[CAM_BUS_GENERATION]=
1968                                 xsoftc.bus_generation;
1969                         cdm->pos.cookie.target = periph->path->target;
1970                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1971                                 periph->path->bus->generation;
1972                         cdm->pos.cookie.device = periph->path->device;
1973                         cdm->pos.generations[CAM_DEV_GENERATION] =
1974                                 periph->path->target->generation;
1975                         cdm->pos.cookie.periph = periph;
1976                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1977                                 periph->path->device->generation;
1978                         cdm->status = CAM_DEV_MATCH_MORE;
1979                         return(0);
1980                 }
1981
1982                 j = cdm->num_matches;
1983                 cdm->num_matches++;
1984                 cdm->matches[j].type = DEV_MATCH_PERIPH;
1985                 cdm->matches[j].result.periph_result.path_id =
1986                         periph->path->bus->path_id;
1987                 cdm->matches[j].result.periph_result.target_id =
1988                         periph->path->target->target_id;
1989                 cdm->matches[j].result.periph_result.target_lun =
1990                         periph->path->device->lun_id;
1991                 cdm->matches[j].result.periph_result.unit_number =
1992                         periph->unit_number;
1993                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
1994                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
1995                         periph->periph_name, l);
1996         }
1997
1998         return(1);
1999 }
2000
2001 static int
2002 xptedtmatch(struct ccb_dev_match *cdm)
2003 {
2004         struct cam_eb *bus;
2005         int ret;
2006
2007         cdm->num_matches = 0;
2008
2009         /*
2010          * Check the bus list generation.  If it has changed, the user
2011          * needs to reset everything and start over.
2012          */
2013         xpt_lock_buses();
2014         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2015          && (cdm->pos.cookie.bus != NULL)) {
2016                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
2017                     xsoftc.bus_generation) {
2018                         xpt_unlock_buses();
2019                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2020                         return(0);
2021                 }
2022                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
2023                 bus->refcount++;
2024         } else
2025                 bus = NULL;
2026         xpt_unlock_buses();
2027
2028         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
2029
2030         /*
2031          * If we get back 0, that means that we had to stop before fully
2032          * traversing the EDT.  It also means that one of the subroutines
2033          * has set the status field to the proper value.  If we get back 1,
2034          * we've fully traversed the EDT and copied out any matching entries.
2035          */
2036         if (ret == 1)
2037                 cdm->status = CAM_DEV_MATCH_LAST;
2038
2039         return(ret);
2040 }
2041
2042 static int
2043 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2044 {
2045         struct cam_periph *periph;
2046         struct ccb_dev_match *cdm;
2047
2048         cdm = (struct ccb_dev_match *)arg;
2049
2050         xpt_lock_buses();
2051         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2052          && (cdm->pos.cookie.pdrv == pdrv)
2053          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2054          && (cdm->pos.cookie.periph != NULL)) {
2055                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2056                     (*pdrv)->generation) {
2057                         xpt_unlock_buses();
2058                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2059                         return(0);
2060                 }
2061                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
2062                 periph->refcount++;
2063         } else
2064                 periph = NULL;
2065         xpt_unlock_buses();
2066
2067         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
2068 }
2069
2070 static int
2071 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2072 {
2073         struct ccb_dev_match *cdm;
2074         dev_match_ret retval;
2075
2076         cdm = (struct ccb_dev_match *)arg;
2077
2078         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2079
2080         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2081                 cdm->status = CAM_DEV_MATCH_ERROR;
2082                 return(0);
2083         }
2084
2085         /*
2086          * If the copy flag is set, copy this peripheral out.
2087          */
2088         if (retval & DM_RET_COPY) {
2089                 int spaceleft, j;
2090                 size_t l;
2091
2092                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2093                         sizeof(struct dev_match_result));
2094
2095                 /*
2096                  * If we don't have enough space to put in another
2097                  * match result, save our position and tell the
2098                  * user there are more devices to check.
2099                  */
2100                 if (spaceleft < sizeof(struct dev_match_result)) {
2101                         struct periph_driver **pdrv;
2102
2103                         pdrv = NULL;
2104                         bzero(&cdm->pos, sizeof(cdm->pos));
2105                         cdm->pos.position_type =
2106                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2107                                 CAM_DEV_POS_PERIPH;
2108
2109                         /*
2110                          * This may look a bit non-sensical, but it is
2111                          * actually quite logical.  There are very few
2112                          * peripheral drivers, and bloating every peripheral
2113                          * structure with a pointer back to its parent
2114                          * peripheral driver linker set entry would cost
2115                          * more in the long run than doing this quick lookup.
2116                          */
2117                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
2118                                 if (strcmp((*pdrv)->driver_name,
2119                                     periph->periph_name) == 0)
2120                                         break;
2121                         }
2122
2123                         if (*pdrv == NULL) {
2124                                 cdm->status = CAM_DEV_MATCH_ERROR;
2125                                 return(0);
2126                         }
2127
2128                         cdm->pos.cookie.pdrv = pdrv;
2129                         /*
2130                          * The periph generation slot does double duty, as
2131                          * does the periph pointer slot.  They are used for
2132                          * both edt and pdrv lookups and positioning.
2133                          */
2134                         cdm->pos.cookie.periph = periph;
2135                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2136                                 (*pdrv)->generation;
2137                         cdm->status = CAM_DEV_MATCH_MORE;
2138                         return(0);
2139                 }
2140
2141                 j = cdm->num_matches;
2142                 cdm->num_matches++;
2143                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2144                 cdm->matches[j].result.periph_result.path_id =
2145                         periph->path->bus->path_id;
2146
2147                 /*
2148                  * The transport layer peripheral doesn't have a target or
2149                  * lun.
2150                  */
2151                 if (periph->path->target)
2152                         cdm->matches[j].result.periph_result.target_id =
2153                                 periph->path->target->target_id;
2154                 else
2155                         cdm->matches[j].result.periph_result.target_id =
2156                                 CAM_TARGET_WILDCARD;
2157
2158                 if (periph->path->device)
2159                         cdm->matches[j].result.periph_result.target_lun =
2160                                 periph->path->device->lun_id;
2161                 else
2162                         cdm->matches[j].result.periph_result.target_lun =
2163                                 CAM_LUN_WILDCARD;
2164
2165                 cdm->matches[j].result.periph_result.unit_number =
2166                         periph->unit_number;
2167                 l = sizeof(cdm->matches[j].result.periph_result.periph_name);
2168                 strlcpy(cdm->matches[j].result.periph_result.periph_name,
2169                         periph->periph_name, l);
2170         }
2171
2172         return(1);
2173 }
2174
2175 static int
2176 xptperiphlistmatch(struct ccb_dev_match *cdm)
2177 {
2178         int ret;
2179
2180         cdm->num_matches = 0;
2181
2182         /*
2183          * At this point in the edt traversal function, we check the bus
2184          * list generation to make sure that no buses have been added or
2185          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2186          * For the peripheral driver list traversal function, however, we
2187          * don't have to worry about new peripheral driver types coming or
2188          * going; they're in a linker set, and therefore can't change
2189          * without a recompile.
2190          */
2191
2192         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2193          && (cdm->pos.cookie.pdrv != NULL))
2194                 ret = xptpdrvtraverse(
2195                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2196                                 xptplistpdrvfunc, cdm);
2197         else
2198                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2199
2200         /*
2201          * If we get back 0, that means that we had to stop before fully
2202          * traversing the peripheral driver tree.  It also means that one of
2203          * the subroutines has set the status field to the proper value.  If
2204          * we get back 1, we've fully traversed the EDT and copied out any
2205          * matching entries.
2206          */
2207         if (ret == 1)
2208                 cdm->status = CAM_DEV_MATCH_LAST;
2209
2210         return(ret);
2211 }
2212
2213 static int
2214 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2215 {
2216         struct cam_eb *bus, *next_bus;
2217         int retval;
2218
2219         retval = 1;
2220         if (start_bus)
2221                 bus = start_bus;
2222         else {
2223                 xpt_lock_buses();
2224                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2225                 if (bus == NULL) {
2226                         xpt_unlock_buses();
2227                         return (retval);
2228                 }
2229                 bus->refcount++;
2230                 xpt_unlock_buses();
2231         }
2232         for (; bus != NULL; bus = next_bus) {
2233                 retval = tr_func(bus, arg);
2234                 if (retval == 0) {
2235                         xpt_release_bus(bus);
2236                         break;
2237                 }
2238                 xpt_lock_buses();
2239                 next_bus = TAILQ_NEXT(bus, links);
2240                 if (next_bus)
2241                         next_bus->refcount++;
2242                 xpt_unlock_buses();
2243                 xpt_release_bus(bus);
2244         }
2245         return(retval);
2246 }
2247
2248 static int
2249 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2250                   xpt_targetfunc_t *tr_func, void *arg)
2251 {
2252         struct cam_et *target, *next_target;
2253         int retval;
2254
2255         retval = 1;
2256         if (start_target)
2257                 target = start_target;
2258         else {
2259                 mtx_lock(&bus->eb_mtx);
2260                 target = TAILQ_FIRST(&bus->et_entries);
2261                 if (target == NULL) {
2262                         mtx_unlock(&bus->eb_mtx);
2263                         return (retval);
2264                 }
2265                 target->refcount++;
2266                 mtx_unlock(&bus->eb_mtx);
2267         }
2268         for (; target != NULL; target = next_target) {
2269                 retval = tr_func(target, arg);
2270                 if (retval == 0) {
2271                         xpt_release_target(target);
2272                         break;
2273                 }
2274                 mtx_lock(&bus->eb_mtx);
2275                 next_target = TAILQ_NEXT(target, links);
2276                 if (next_target)
2277                         next_target->refcount++;
2278                 mtx_unlock(&bus->eb_mtx);
2279                 xpt_release_target(target);
2280         }
2281         return(retval);
2282 }
2283
2284 static int
2285 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2286                   xpt_devicefunc_t *tr_func, void *arg)
2287 {
2288         struct cam_eb *bus;
2289         struct cam_ed *device, *next_device;
2290         int retval;
2291
2292         retval = 1;
2293         bus = target->bus;
2294         if (start_device)
2295                 device = start_device;
2296         else {
2297                 mtx_lock(&bus->eb_mtx);
2298                 device = TAILQ_FIRST(&target->ed_entries);
2299                 if (device == NULL) {
2300                         mtx_unlock(&bus->eb_mtx);
2301                         return (retval);
2302                 }
2303                 device->refcount++;
2304                 mtx_unlock(&bus->eb_mtx);
2305         }
2306         for (; device != NULL; device = next_device) {
2307                 mtx_lock(&device->device_mtx);
2308                 retval = tr_func(device, arg);
2309                 mtx_unlock(&device->device_mtx);
2310                 if (retval == 0) {
2311                         xpt_release_device(device);
2312                         break;
2313                 }
2314                 mtx_lock(&bus->eb_mtx);
2315                 next_device = TAILQ_NEXT(device, links);
2316                 if (next_device)
2317                         next_device->refcount++;
2318                 mtx_unlock(&bus->eb_mtx);
2319                 xpt_release_device(device);
2320         }
2321         return(retval);
2322 }
2323
2324 static int
2325 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2326                   xpt_periphfunc_t *tr_func, void *arg)
2327 {
2328         struct cam_eb *bus;
2329         struct cam_periph *periph, *next_periph;
2330         int retval;
2331
2332         retval = 1;
2333
2334         bus = device->target->bus;
2335         if (start_periph)
2336                 periph = start_periph;
2337         else {
2338                 xpt_lock_buses();
2339                 mtx_lock(&bus->eb_mtx);
2340                 periph = SLIST_FIRST(&device->periphs);
2341                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2342                         periph = SLIST_NEXT(periph, periph_links);
2343                 if (periph == NULL) {
2344                         mtx_unlock(&bus->eb_mtx);
2345                         xpt_unlock_buses();
2346                         return (retval);
2347                 }
2348                 periph->refcount++;
2349                 mtx_unlock(&bus->eb_mtx);
2350                 xpt_unlock_buses();
2351         }
2352         for (; periph != NULL; periph = next_periph) {
2353                 retval = tr_func(periph, arg);
2354                 if (retval == 0) {
2355                         cam_periph_release_locked(periph);
2356                         break;
2357                 }
2358                 xpt_lock_buses();
2359                 mtx_lock(&bus->eb_mtx);
2360                 next_periph = SLIST_NEXT(periph, periph_links);
2361                 while (next_periph != NULL &&
2362                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2363                         next_periph = SLIST_NEXT(next_periph, periph_links);
2364                 if (next_periph)
2365                         next_periph->refcount++;
2366                 mtx_unlock(&bus->eb_mtx);
2367                 xpt_unlock_buses();
2368                 cam_periph_release_locked(periph);
2369         }
2370         return(retval);
2371 }
2372
2373 static int
2374 xptpdrvtraverse(struct periph_driver **start_pdrv,
2375                 xpt_pdrvfunc_t *tr_func, void *arg)
2376 {
2377         struct periph_driver **pdrv;
2378         int retval;
2379
2380         retval = 1;
2381
2382         /*
2383          * We don't traverse the peripheral driver list like we do the
2384          * other lists, because it is a linker set, and therefore cannot be
2385          * changed during runtime.  If the peripheral driver list is ever
2386          * re-done to be something other than a linker set (i.e. it can
2387          * change while the system is running), the list traversal should
2388          * be modified to work like the other traversal functions.
2389          */
2390         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2391              *pdrv != NULL; pdrv++) {
2392                 retval = tr_func(pdrv, arg);
2393
2394                 if (retval == 0)
2395                         return(retval);
2396         }
2397
2398         return(retval);
2399 }
2400
2401 static int
2402 xptpdperiphtraverse(struct periph_driver **pdrv,
2403                     struct cam_periph *start_periph,
2404                     xpt_periphfunc_t *tr_func, void *arg)
2405 {
2406         struct cam_periph *periph, *next_periph;
2407         int retval;
2408
2409         retval = 1;
2410
2411         if (start_periph)
2412                 periph = start_periph;
2413         else {
2414                 xpt_lock_buses();
2415                 periph = TAILQ_FIRST(&(*pdrv)->units);
2416                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2417                         periph = TAILQ_NEXT(periph, unit_links);
2418                 if (periph == NULL) {
2419                         xpt_unlock_buses();
2420                         return (retval);
2421                 }
2422                 periph->refcount++;
2423                 xpt_unlock_buses();
2424         }
2425         for (; periph != NULL; periph = next_periph) {
2426                 cam_periph_lock(periph);
2427                 retval = tr_func(periph, arg);
2428                 cam_periph_unlock(periph);
2429                 if (retval == 0) {
2430                         cam_periph_release(periph);
2431                         break;
2432                 }
2433                 xpt_lock_buses();
2434                 next_periph = TAILQ_NEXT(periph, unit_links);
2435                 while (next_periph != NULL &&
2436                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2437                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2438                 if (next_periph)
2439                         next_periph->refcount++;
2440                 xpt_unlock_buses();
2441                 cam_periph_release(periph);
2442         }
2443         return(retval);
2444 }
2445
2446 static int
2447 xptdefbusfunc(struct cam_eb *bus, void *arg)
2448 {
2449         struct xpt_traverse_config *tr_config;
2450
2451         tr_config = (struct xpt_traverse_config *)arg;
2452
2453         if (tr_config->depth == XPT_DEPTH_BUS) {
2454                 xpt_busfunc_t *tr_func;
2455
2456                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2457
2458                 return(tr_func(bus, tr_config->tr_arg));
2459         } else
2460                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2461 }
2462
2463 static int
2464 xptdeftargetfunc(struct cam_et *target, void *arg)
2465 {
2466         struct xpt_traverse_config *tr_config;
2467
2468         tr_config = (struct xpt_traverse_config *)arg;
2469
2470         if (tr_config->depth == XPT_DEPTH_TARGET) {
2471                 xpt_targetfunc_t *tr_func;
2472
2473                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2474
2475                 return(tr_func(target, tr_config->tr_arg));
2476         } else
2477                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2478 }
2479
2480 static int
2481 xptdefdevicefunc(struct cam_ed *device, void *arg)
2482 {
2483         struct xpt_traverse_config *tr_config;
2484
2485         tr_config = (struct xpt_traverse_config *)arg;
2486
2487         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2488                 xpt_devicefunc_t *tr_func;
2489
2490                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2491
2492                 return(tr_func(device, tr_config->tr_arg));
2493         } else
2494                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2495 }
2496
2497 static int
2498 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2499 {
2500         struct xpt_traverse_config *tr_config;
2501         xpt_periphfunc_t *tr_func;
2502
2503         tr_config = (struct xpt_traverse_config *)arg;
2504
2505         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2506
2507         /*
2508          * Unlike the other default functions, we don't check for depth
2509          * here.  The peripheral driver level is the last level in the EDT,
2510          * so if we're here, we should execute the function in question.
2511          */
2512         return(tr_func(periph, tr_config->tr_arg));
2513 }
2514
2515 /*
2516  * Execute the given function for every bus in the EDT.
2517  */
2518 static int
2519 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2520 {
2521         struct xpt_traverse_config tr_config;
2522
2523         tr_config.depth = XPT_DEPTH_BUS;
2524         tr_config.tr_func = tr_func;
2525         tr_config.tr_arg = arg;
2526
2527         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2528 }
2529
2530 /*
2531  * Execute the given function for every device in the EDT.
2532  */
2533 static int
2534 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2535 {
2536         struct xpt_traverse_config tr_config;
2537
2538         tr_config.depth = XPT_DEPTH_DEVICE;
2539         tr_config.tr_func = tr_func;
2540         tr_config.tr_arg = arg;
2541
2542         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2543 }
2544
2545 static int
2546 xptsetasyncfunc(struct cam_ed *device, void *arg)
2547 {
2548         struct cam_path path;
2549         struct ccb_getdev cgd;
2550         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2551
2552         /*
2553          * Don't report unconfigured devices (Wildcard devs,
2554          * devices only for target mode, device instances
2555          * that have been invalidated but are waiting for
2556          * their last reference count to be released).
2557          */
2558         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2559                 return (1);
2560
2561         memset(&cgd, 0, sizeof(cgd));
2562         xpt_compile_path(&path,
2563                          NULL,
2564                          device->target->bus->path_id,
2565                          device->target->target_id,
2566                          device->lun_id);
2567         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2568         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2569         xpt_action((union ccb *)&cgd);
2570         csa->callback(csa->callback_arg,
2571                             AC_FOUND_DEVICE,
2572                             &path, &cgd);
2573         xpt_release_path(&path);
2574
2575         return(1);
2576 }
2577
2578 static int
2579 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2580 {
2581         struct cam_path path;
2582         struct ccb_pathinq cpi;
2583         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2584
2585         xpt_compile_path(&path, /*periph*/NULL,
2586                          bus->path_id,
2587                          CAM_TARGET_WILDCARD,
2588                          CAM_LUN_WILDCARD);
2589         xpt_path_lock(&path);
2590         xpt_path_inq(&cpi, &path);
2591         csa->callback(csa->callback_arg,
2592                             AC_PATH_REGISTERED,
2593                             &path, &cpi);
2594         xpt_path_unlock(&path);
2595         xpt_release_path(&path);
2596
2597         return(1);
2598 }
2599
2600 void
2601 xpt_action(union ccb *start_ccb)
2602 {
2603
2604         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2605             ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2606                 xpt_action_name(start_ccb->ccb_h.func_code)));
2607
2608         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2609         (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb);
2610 }
2611
2612 void
2613 xpt_action_default(union ccb *start_ccb)
2614 {
2615         struct cam_path *path;
2616         struct cam_sim *sim;
2617         struct mtx *mtx;
2618
2619         path = start_ccb->ccb_h.path;
2620         CAM_DEBUG(path, CAM_DEBUG_TRACE,
2621             ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2622                 xpt_action_name(start_ccb->ccb_h.func_code)));
2623
2624         switch (start_ccb->ccb_h.func_code) {
2625         case XPT_SCSI_IO:
2626         {
2627                 struct cam_ed *device;
2628
2629                 /*
2630                  * For the sake of compatibility with SCSI-1
2631                  * devices that may not understand the identify
2632                  * message, we include lun information in the
2633                  * second byte of all commands.  SCSI-1 specifies
2634                  * that luns are a 3 bit value and reserves only 3
2635                  * bits for lun information in the CDB.  Later
2636                  * revisions of the SCSI spec allow for more than 8
2637                  * luns, but have deprecated lun information in the
2638                  * CDB.  So, if the lun won't fit, we must omit.
2639                  *
2640                  * Also be aware that during initial probing for devices,
2641                  * the inquiry information is unknown but initialized to 0.
2642                  * This means that this code will be exercised while probing
2643                  * devices with an ANSI revision greater than 2.
2644                  */
2645                 device = path->device;
2646                 if (device->protocol_version <= SCSI_REV_2
2647                  && start_ccb->ccb_h.target_lun < 8
2648                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2649                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2650                             start_ccb->ccb_h.target_lun << 5;
2651                 }
2652                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2653         }
2654         /* FALLTHROUGH */
2655         case XPT_TARGET_IO:
2656         case XPT_CONT_TARGET_IO:
2657                 start_ccb->csio.sense_resid = 0;
2658                 start_ccb->csio.resid = 0;
2659                 /* FALLTHROUGH */
2660         case XPT_ATA_IO:
2661                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2662                         start_ccb->ataio.resid = 0;
2663                 /* FALLTHROUGH */
2664         case XPT_NVME_IO:
2665         case XPT_NVME_ADMIN:
2666         case XPT_MMC_IO:
2667         case XPT_MMC_GET_TRAN_SETTINGS:
2668         case XPT_MMC_SET_TRAN_SETTINGS:
2669         case XPT_RESET_DEV:
2670         case XPT_ENG_EXEC:
2671         case XPT_SMP_IO:
2672         {
2673                 struct cam_devq *devq;
2674
2675                 devq = path->bus->sim->devq;
2676                 mtx_lock(&devq->send_mtx);
2677                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2678                 if (xpt_schedule_devq(devq, path->device) != 0)
2679                         xpt_run_devq(devq);
2680                 mtx_unlock(&devq->send_mtx);
2681                 break;
2682         }
2683         case XPT_CALC_GEOMETRY:
2684                 /* Filter out garbage */
2685                 if (start_ccb->ccg.block_size == 0
2686                  || start_ccb->ccg.volume_size == 0) {
2687                         start_ccb->ccg.cylinders = 0;
2688                         start_ccb->ccg.heads = 0;
2689                         start_ccb->ccg.secs_per_track = 0;
2690                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2691                         break;
2692                 }
2693                 goto call_sim;
2694         case XPT_ABORT:
2695         {
2696                 union ccb* abort_ccb;
2697
2698                 abort_ccb = start_ccb->cab.abort_ccb;
2699                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2700                         struct cam_ed *device;
2701                         struct cam_devq *devq;
2702
2703                         device = abort_ccb->ccb_h.path->device;
2704                         devq = device->sim->devq;
2705
2706                         mtx_lock(&devq->send_mtx);
2707                         if (abort_ccb->ccb_h.pinfo.index > 0) {
2708                                 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb);
2709                                 abort_ccb->ccb_h.status =
2710                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2711                                 xpt_freeze_devq_device(device, 1);
2712                                 mtx_unlock(&devq->send_mtx);
2713                                 xpt_done(abort_ccb);
2714                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2715                                 break;
2716                         }
2717                         mtx_unlock(&devq->send_mtx);
2718
2719                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2720                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2721                                 /*
2722                                  * We've caught this ccb en route to
2723                                  * the SIM.  Flag it for abort and the
2724                                  * SIM will do so just before starting
2725                                  * real work on the CCB.
2726                                  */
2727                                 abort_ccb->ccb_h.status =
2728                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2729                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2730                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2731                                 break;
2732                         }
2733                 }
2734                 if (XPT_FC_IS_QUEUED(abort_ccb)
2735                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2736                         /*
2737                          * It's already completed but waiting
2738                          * for our SWI to get to it.
2739                          */
2740                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2741                         break;
2742                 }
2743                 /*
2744                  * If we weren't able to take care of the abort request
2745                  * in the XPT, pass the request down to the SIM for processing.
2746                  */
2747         }
2748         /* FALLTHROUGH */
2749         case XPT_ACCEPT_TARGET_IO:
2750         case XPT_EN_LUN:
2751         case XPT_IMMED_NOTIFY:
2752         case XPT_NOTIFY_ACK:
2753         case XPT_RESET_BUS:
2754         case XPT_IMMEDIATE_NOTIFY:
2755         case XPT_NOTIFY_ACKNOWLEDGE:
2756         case XPT_GET_SIM_KNOB_OLD:
2757         case XPT_GET_SIM_KNOB:
2758         case XPT_SET_SIM_KNOB:
2759         case XPT_GET_TRAN_SETTINGS:
2760         case XPT_SET_TRAN_SETTINGS:
2761         case XPT_PATH_INQ:
2762 call_sim:
2763                 sim = path->bus->sim;
2764                 mtx = sim->mtx;
2765                 if (mtx && !mtx_owned(mtx))
2766                         mtx_lock(mtx);
2767                 else
2768                         mtx = NULL;
2769
2770                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2771                     ("Calling sim->sim_action(): func=%#x\n", start_ccb->ccb_h.func_code));
2772                 (*(sim->sim_action))(sim, start_ccb);
2773                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2774                     ("sim->sim_action returned: status=%#x\n", start_ccb->ccb_h.status));
2775                 if (mtx)
2776                         mtx_unlock(mtx);
2777                 break;
2778         case XPT_PATH_STATS:
2779                 start_ccb->cpis.last_reset = path->bus->last_reset;
2780                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2781                 break;
2782         case XPT_GDEV_TYPE:
2783         {
2784                 struct cam_ed *dev;
2785
2786                 dev = path->device;
2787                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2788                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2789                 } else {
2790                         struct ccb_getdev *cgd;
2791
2792                         cgd = &start_ccb->cgd;
2793                         cgd->protocol = dev->protocol;
2794                         cgd->inq_data = dev->inq_data;
2795                         cgd->ident_data = dev->ident_data;
2796                         cgd->inq_flags = dev->inq_flags;
2797                         cgd->ccb_h.status = CAM_REQ_CMP;
2798                         cgd->serial_num_len = dev->serial_num_len;
2799                         if ((dev->serial_num_len > 0)
2800                          && (dev->serial_num != NULL))
2801                                 bcopy(dev->serial_num, cgd->serial_num,
2802                                       dev->serial_num_len);
2803                 }
2804                 break;
2805         }
2806         case XPT_GDEV_STATS:
2807         {
2808                 struct ccb_getdevstats *cgds = &start_ccb->cgds;
2809                 struct cam_ed *dev = path->device;
2810                 struct cam_eb *bus = path->bus;
2811                 struct cam_et *tar = path->target;
2812                 struct cam_devq *devq = bus->sim->devq;
2813
2814                 mtx_lock(&devq->send_mtx);
2815                 cgds->dev_openings = dev->ccbq.dev_openings;
2816                 cgds->dev_active = dev->ccbq.dev_active;
2817                 cgds->allocated = dev->ccbq.allocated;
2818                 cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2819                 cgds->held = cgds->allocated - cgds->dev_active - cgds->queued;
2820                 cgds->last_reset = tar->last_reset;
2821                 cgds->maxtags = dev->maxtags;
2822                 cgds->mintags = dev->mintags;
2823                 if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2824                         cgds->last_reset = bus->last_reset;
2825                 mtx_unlock(&devq->send_mtx);
2826                 cgds->ccb_h.status = CAM_REQ_CMP;
2827                 break;
2828         }
2829         case XPT_GDEVLIST:
2830         {
2831                 struct cam_periph       *nperiph;
2832                 struct periph_list      *periph_head;
2833                 struct ccb_getdevlist   *cgdl;
2834                 u_int                   i;
2835                 struct cam_ed           *device;
2836                 int                     found;
2837
2838                 found = 0;
2839
2840                 /*
2841                  * Don't want anyone mucking with our data.
2842                  */
2843                 device = path->device;
2844                 periph_head = &device->periphs;
2845                 cgdl = &start_ccb->cgdl;
2846
2847                 /*
2848                  * Check and see if the list has changed since the user
2849                  * last requested a list member.  If so, tell them that the
2850                  * list has changed, and therefore they need to start over
2851                  * from the beginning.
2852                  */
2853                 if ((cgdl->index != 0) &&
2854                     (cgdl->generation != device->generation)) {
2855                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2856                         break;
2857                 }
2858
2859                 /*
2860                  * Traverse the list of peripherals and attempt to find
2861                  * the requested peripheral.
2862                  */
2863                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2864                      (nperiph != NULL) && (i <= cgdl->index);
2865                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2866                         if (i == cgdl->index) {
2867                                 strlcpy(cgdl->periph_name,
2868                                         nperiph->periph_name,
2869                                         sizeof(cgdl->periph_name));
2870                                 cgdl->unit_number = nperiph->unit_number;
2871                                 found = 1;
2872                         }
2873                 }
2874                 if (found == 0) {
2875                         cgdl->status = CAM_GDEVLIST_ERROR;
2876                         break;
2877                 }
2878
2879                 if (nperiph == NULL)
2880                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2881                 else
2882                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2883
2884                 cgdl->index++;
2885                 cgdl->generation = device->generation;
2886
2887                 cgdl->ccb_h.status = CAM_REQ_CMP;
2888                 break;
2889         }
2890         case XPT_DEV_MATCH:
2891         {
2892                 dev_pos_type position_type;
2893                 struct ccb_dev_match *cdm;
2894
2895                 cdm = &start_ccb->cdm;
2896
2897                 /*
2898                  * There are two ways of getting at information in the EDT.
2899                  * The first way is via the primary EDT tree.  It starts
2900                  * with a list of buses, then a list of targets on a bus,
2901                  * then devices/luns on a target, and then peripherals on a
2902                  * device/lun.  The "other" way is by the peripheral driver
2903                  * lists.  The peripheral driver lists are organized by
2904                  * peripheral driver.  (obviously)  So it makes sense to
2905                  * use the peripheral driver list if the user is looking
2906                  * for something like "da1", or all "da" devices.  If the
2907                  * user is looking for something on a particular bus/target
2908                  * or lun, it's generally better to go through the EDT tree.
2909                  */
2910
2911                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2912                         position_type = cdm->pos.position_type;
2913                 else {
2914                         u_int i;
2915
2916                         position_type = CAM_DEV_POS_NONE;
2917
2918                         for (i = 0; i < cdm->num_patterns; i++) {
2919                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2920                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2921                                         position_type = CAM_DEV_POS_EDT;
2922                                         break;
2923                                 }
2924                         }
2925
2926                         if (cdm->num_patterns == 0)
2927                                 position_type = CAM_DEV_POS_EDT;
2928                         else if (position_type == CAM_DEV_POS_NONE)
2929                                 position_type = CAM_DEV_POS_PDRV;
2930                 }
2931
2932                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2933                 case CAM_DEV_POS_EDT:
2934                         xptedtmatch(cdm);
2935                         break;
2936                 case CAM_DEV_POS_PDRV:
2937                         xptperiphlistmatch(cdm);
2938                         break;
2939                 default:
2940                         cdm->status = CAM_DEV_MATCH_ERROR;
2941                         break;
2942                 }
2943
2944                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2945                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2946                 else
2947                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2948
2949                 break;
2950         }
2951         case XPT_SASYNC_CB:
2952         {
2953                 struct ccb_setasync *csa;
2954                 struct async_node *cur_entry;
2955                 struct async_list *async_head;
2956                 u_int32_t added;
2957
2958                 csa = &start_ccb->csa;
2959                 added = csa->event_enable;
2960                 async_head = &path->device->asyncs;
2961
2962                 /*
2963                  * If there is already an entry for us, simply
2964                  * update it.
2965                  */
2966                 cur_entry = SLIST_FIRST(async_head);
2967                 while (cur_entry != NULL) {
2968                         if ((cur_entry->callback_arg == csa->callback_arg)
2969                          && (cur_entry->callback == csa->callback))
2970                                 break;
2971                         cur_entry = SLIST_NEXT(cur_entry, links);
2972                 }
2973
2974                 if (cur_entry != NULL) {
2975                         /*
2976                          * If the request has no flags set,
2977                          * remove the entry.
2978                          */
2979                         added &= ~cur_entry->event_enable;
2980                         if (csa->event_enable == 0) {
2981                                 SLIST_REMOVE(async_head, cur_entry,
2982                                              async_node, links);
2983                                 xpt_release_device(path->device);
2984                                 free(cur_entry, M_CAMXPT);
2985                         } else {
2986                                 cur_entry->event_enable = csa->event_enable;
2987                         }
2988                         csa->event_enable = added;
2989                 } else {
2990                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2991                                            M_NOWAIT);
2992                         if (cur_entry == NULL) {
2993                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2994                                 break;
2995                         }
2996                         cur_entry->event_enable = csa->event_enable;
2997                         cur_entry->event_lock = (path->bus->sim->mtx &&
2998                             mtx_owned(path->bus->sim->mtx)) ? 1 : 0;
2999                         cur_entry->callback_arg = csa->callback_arg;
3000                         cur_entry->callback = csa->callback;
3001                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3002                         xpt_acquire_device(path->device);
3003                 }
3004                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3005                 break;
3006         }
3007         case XPT_REL_SIMQ:
3008         {
3009                 struct ccb_relsim *crs;
3010                 struct cam_ed *dev;
3011
3012                 crs = &start_ccb->crs;
3013                 dev = path->device;
3014                 if (dev == NULL) {
3015                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3016                         break;
3017                 }
3018
3019                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3020                         /* Don't ever go below one opening */
3021                         if (crs->openings > 0) {
3022                                 xpt_dev_ccbq_resize(path, crs->openings);
3023                                 if (bootverbose) {
3024                                         xpt_print(path,
3025                                             "number of openings is now %d\n",
3026                                             crs->openings);
3027                                 }
3028                         }
3029                 }
3030
3031                 mtx_lock(&dev->sim->devq->send_mtx);
3032                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3033                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3034                                 /*
3035                                  * Just extend the old timeout and decrement
3036                                  * the freeze count so that a single timeout
3037                                  * is sufficient for releasing the queue.
3038                                  */
3039                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3040                                 callout_stop(&dev->callout);
3041                         } else {
3042                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3043                         }
3044
3045                         callout_reset_sbt(&dev->callout,
3046                             SBT_1MS * crs->release_timeout, 0,
3047                             xpt_release_devq_timeout, dev, 0);
3048
3049                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3050                 }
3051
3052                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3053                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3054                                 /*
3055                                  * Decrement the freeze count so that a single
3056                                  * completion is still sufficient to unfreeze
3057                                  * the queue.
3058                                  */
3059                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3060                         } else {
3061                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3062                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3063                         }
3064                 }
3065
3066                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3067                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3068                          || (dev->ccbq.dev_active == 0)) {
3069                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3070                         } else {
3071                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3072                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3073                         }
3074                 }
3075                 mtx_unlock(&dev->sim->devq->send_mtx);
3076
3077                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3078                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3079                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3080                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3081                 break;
3082         }
3083         case XPT_DEBUG: {
3084                 struct cam_path *oldpath;
3085
3086                 /* Check that all request bits are supported. */
3087                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3088                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3089                         break;
3090                 }
3091
3092                 cam_dflags = CAM_DEBUG_NONE;
3093                 if (cam_dpath != NULL) {
3094                         oldpath = cam_dpath;
3095                         cam_dpath = NULL;
3096                         xpt_free_path(oldpath);
3097                 }
3098                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3099                         if (xpt_create_path(&cam_dpath, NULL,
3100                                             start_ccb->ccb_h.path_id,
3101                                             start_ccb->ccb_h.target_id,
3102                                             start_ccb->ccb_h.target_lun) !=
3103                                             CAM_REQ_CMP) {
3104                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3105                         } else {
3106                                 cam_dflags = start_ccb->cdbg.flags;
3107                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3108                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3109                                     cam_dflags);
3110                         }
3111                 } else
3112                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3113                 break;
3114         }
3115         case XPT_NOOP:
3116                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3117                         xpt_freeze_devq(path, 1);
3118                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3119                 break;
3120         case XPT_REPROBE_LUN:
3121                 xpt_async(AC_INQ_CHANGED, path, NULL);
3122                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3123                 xpt_done(start_ccb);
3124                 break;
3125         case XPT_ASYNC:
3126                 /*
3127                  * Queue the async operation so it can be run from a sleepable
3128                  * context.
3129                  */
3130                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3131                 mtx_lock(&cam_async.cam_doneq_mtx);
3132                 STAILQ_INSERT_TAIL(&cam_async.cam_doneq, &start_ccb->ccb_h, sim_links.stqe);
3133                 start_ccb->ccb_h.pinfo.index = CAM_ASYNC_INDEX;
3134                 mtx_unlock(&cam_async.cam_doneq_mtx);
3135                 wakeup(&cam_async.cam_doneq);
3136                 break;
3137         default:
3138         case XPT_SDEV_TYPE:
3139         case XPT_TERM_IO:
3140         case XPT_ENG_INQ:
3141                 /* XXX Implement */
3142                 xpt_print(start_ccb->ccb_h.path,
3143                     "%s: CCB type %#x %s not supported\n", __func__,
3144                     start_ccb->ccb_h.func_code,
3145                     xpt_action_name(start_ccb->ccb_h.func_code));
3146                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3147                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3148                         xpt_done(start_ccb);
3149                 }
3150                 break;
3151         }
3152         CAM_DEBUG(path, CAM_DEBUG_TRACE,
3153             ("xpt_action_default: func= %#x %s status %#x\n",
3154                 start_ccb->ccb_h.func_code,
3155                 xpt_action_name(start_ccb->ccb_h.func_code),
3156                 start_ccb->ccb_h.status));
3157 }
3158
3159 /*
3160  * Call the sim poll routine to allow the sim to complete
3161  * any inflight requests, then call camisr_runqueue to
3162  * complete any CCB that the polling completed.
3163  */
3164 void
3165 xpt_sim_poll(struct cam_sim *sim)
3166 {
3167         struct mtx *mtx;
3168
3169         KASSERT(cam_sim_pollable(sim), ("%s: non-pollable sim", __func__));
3170         mtx = sim->mtx;
3171         if (mtx)
3172                 mtx_lock(mtx);
3173         (*(sim->sim_poll))(sim);
3174         if (mtx)
3175                 mtx_unlock(mtx);
3176         camisr_runqueue();
3177 }
3178
3179 uint32_t
3180 xpt_poll_setup(union ccb *start_ccb)
3181 {
3182         u_int32_t timeout;
3183         struct    cam_sim *sim;
3184         struct    cam_devq *devq;
3185         struct    cam_ed *dev;
3186
3187         timeout = start_ccb->ccb_h.timeout * 10;
3188         sim = start_ccb->ccb_h.path->bus->sim;
3189         devq = sim->devq;
3190         dev = start_ccb->ccb_h.path->device;
3191
3192         KASSERT(cam_sim_pollable(sim), ("%s: non-pollable sim", __func__));
3193
3194         /*
3195          * Steal an opening so that no other queued requests
3196          * can get it before us while we simulate interrupts.
3197          */
3198         mtx_lock(&devq->send_mtx);
3199         dev->ccbq.dev_openings--;
3200         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3201             (--timeout > 0)) {
3202                 mtx_unlock(&devq->send_mtx);
3203                 DELAY(100);
3204                 xpt_sim_poll(sim);
3205                 mtx_lock(&devq->send_mtx);
3206         }
3207         dev->ccbq.dev_openings++;
3208         mtx_unlock(&devq->send_mtx);
3209
3210         return (timeout);
3211 }
3212
3213 void
3214 xpt_pollwait(union ccb *start_ccb, uint32_t timeout)
3215 {
3216
3217         KASSERT(cam_sim_pollable(start_ccb->ccb_h.path->bus->sim),
3218             ("%s: non-pollable sim", __func__));
3219         while (--timeout > 0) {
3220                 xpt_sim_poll(start_ccb->ccb_h.path->bus->sim);
3221                 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK)
3222                     != CAM_REQ_INPROG)
3223                         break;
3224                 DELAY(100);
3225         }
3226
3227         if (timeout == 0) {
3228                 /*
3229                  * XXX Is it worth adding a sim_timeout entry
3230                  * point so we can attempt recovery?  If
3231                  * this is only used for dumps, I don't think
3232                  * it is.
3233                  */
3234                 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3235         }
3236 }
3237
3238 /*
3239  * Schedule a peripheral driver to receive a ccb when its
3240  * target device has space for more transactions.
3241  */
3242 void
3243 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3244 {
3245
3246         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3247         cam_periph_assert(periph, MA_OWNED);
3248         if (new_priority < periph->scheduled_priority) {
3249                 periph->scheduled_priority = new_priority;
3250                 xpt_run_allocq(periph, 0);
3251         }
3252 }
3253
3254 /*
3255  * Schedule a device to run on a given queue.
3256  * If the device was inserted as a new entry on the queue,
3257  * return 1 meaning the device queue should be run. If we
3258  * were already queued, implying someone else has already
3259  * started the queue, return 0 so the caller doesn't attempt
3260  * to run the queue.
3261  */
3262 static int
3263 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3264                  u_int32_t new_priority)
3265 {
3266         int retval;
3267         u_int32_t old_priority;
3268
3269         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3270
3271         old_priority = pinfo->priority;
3272
3273         /*
3274          * Are we already queued?
3275          */
3276         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3277                 /* Simply reorder based on new priority */
3278                 if (new_priority < old_priority) {
3279                         camq_change_priority(queue, pinfo->index,
3280                                              new_priority);
3281                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3282                                         ("changed priority to %d\n",
3283                                          new_priority));
3284                         retval = 1;
3285                 } else
3286                         retval = 0;
3287         } else {
3288                 /* New entry on the queue */
3289                 if (new_priority < old_priority)
3290                         pinfo->priority = new_priority;
3291
3292                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3293                                 ("Inserting onto queue\n"));
3294                 pinfo->generation = ++queue->generation;
3295                 camq_insert(queue, pinfo);
3296                 retval = 1;
3297         }
3298         return (retval);
3299 }
3300
3301 static void
3302 xpt_run_allocq_task(void *context, int pending)
3303 {
3304         struct cam_periph *periph = context;
3305
3306         cam_periph_lock(periph);
3307         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3308         xpt_run_allocq(periph, 1);
3309         cam_periph_unlock(periph);
3310         cam_periph_release(periph);
3311 }
3312
3313 static void
3314 xpt_run_allocq(struct cam_periph *periph, int sleep)
3315 {
3316         struct cam_ed   *device;
3317         union ccb       *ccb;
3318         uint32_t         prio;
3319
3320         cam_periph_assert(periph, MA_OWNED);
3321         if (periph->periph_allocating)
3322                 return;
3323         cam_periph_doacquire(periph);
3324         periph->periph_allocating = 1;
3325         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3326         device = periph->path->device;
3327         ccb = NULL;
3328 restart:
3329         while ((prio = min(periph->scheduled_priority,
3330             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3331             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3332              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3333                 if (ccb == NULL &&
3334                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3335                         if (sleep) {
3336                                 ccb = xpt_get_ccb(periph);
3337                                 goto restart;
3338                         }
3339                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3340                                 break;
3341                         cam_periph_doacquire(periph);
3342                         periph->flags |= CAM_PERIPH_RUN_TASK;
3343                         taskqueue_enqueue(xsoftc.xpt_taskq,
3344                             &periph->periph_run_task);
3345                         break;
3346                 }
3347                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3348                 if (prio == periph->immediate_priority) {
3349                         periph->immediate_priority = CAM_PRIORITY_NONE;
3350                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3351                                         ("waking cam_periph_getccb()\n"));
3352                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3353                                           periph_links.sle);
3354                         wakeup(&periph->ccb_list);
3355                 } else {
3356                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3357                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3358                                         ("calling periph_start()\n"));
3359                         periph->periph_start(periph, ccb);
3360                 }
3361                 ccb = NULL;
3362         }
3363         if (ccb != NULL)
3364                 xpt_release_ccb(ccb);
3365         periph->periph_allocating = 0;
3366         cam_periph_release_locked(periph);
3367 }
3368
3369 static void
3370 xpt_run_devq(struct cam_devq *devq)
3371 {
3372         struct mtx *mtx;
3373
3374         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3375
3376         devq->send_queue.qfrozen_cnt++;
3377         while ((devq->send_queue.entries > 0)
3378             && (devq->send_openings > 0)
3379             && (devq->send_queue.qfrozen_cnt <= 1)) {
3380                 struct  cam_ed *device;
3381                 union ccb *work_ccb;
3382                 struct  cam_sim *sim;
3383                 struct xpt_proto *proto;
3384
3385                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3386                                                            CAMQ_HEAD);
3387                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3388                                 ("running device %p\n", device));
3389
3390                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3391                 if (work_ccb == NULL) {
3392                         printf("device on run queue with no ccbs???\n");
3393                         continue;
3394                 }
3395
3396                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3397                         mtx_lock(&xsoftc.xpt_highpower_lock);
3398                         if (xsoftc.num_highpower <= 0) {
3399                                 /*
3400                                  * We got a high power command, but we
3401                                  * don't have any available slots.  Freeze
3402                                  * the device queue until we have a slot
3403                                  * available.
3404                                  */
3405                                 xpt_freeze_devq_device(device, 1);
3406                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3407                                                    highpowerq_entry);
3408
3409                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3410                                 continue;
3411                         } else {
3412                                 /*
3413                                  * Consume a high power slot while
3414                                  * this ccb runs.
3415                                  */
3416                                 xsoftc.num_highpower--;
3417                         }
3418                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3419                 }
3420                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3421                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3422                 devq->send_openings--;
3423                 devq->send_active++;
3424                 xpt_schedule_devq(devq, device);
3425                 mtx_unlock(&devq->send_mtx);
3426
3427                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3428                         /*
3429                          * The client wants to freeze the queue
3430                          * after this CCB is sent.
3431                          */
3432                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3433                 }
3434
3435                 /* In Target mode, the peripheral driver knows best... */
3436                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3437                         if ((device->inq_flags & SID_CmdQue) != 0
3438                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3439                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3440                         else
3441                                 /*
3442                                  * Clear this in case of a retried CCB that
3443                                  * failed due to a rejected tag.
3444                                  */
3445                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3446                 }
3447
3448                 KASSERT(device == work_ccb->ccb_h.path->device,
3449                     ("device (%p) / path->device (%p) mismatch",
3450                         device, work_ccb->ccb_h.path->device));
3451                 proto = xpt_proto_find(device->protocol);
3452                 if (proto && proto->ops->debug_out)
3453                         proto->ops->debug_out(work_ccb);
3454
3455                 /*
3456                  * Device queues can be shared among multiple SIM instances
3457                  * that reside on different buses.  Use the SIM from the
3458                  * queued device, rather than the one from the calling bus.
3459                  */
3460                 sim = device->sim;
3461                 mtx = sim->mtx;
3462                 if (mtx && !mtx_owned(mtx))
3463                         mtx_lock(mtx);
3464                 else
3465                         mtx = NULL;
3466                 work_ccb->ccb_h.qos.periph_data = cam_iosched_now();
3467                 (*(sim->sim_action))(sim, work_ccb);
3468                 if (mtx)
3469                         mtx_unlock(mtx);
3470                 mtx_lock(&devq->send_mtx);
3471         }
3472         devq->send_queue.qfrozen_cnt--;
3473 }
3474
3475 /*
3476  * This function merges stuff from the src ccb into the dst ccb, while keeping
3477  * important fields in the dst ccb constant.
3478  */
3479 void
3480 xpt_merge_ccb(union ccb *dst_ccb, union ccb *src_ccb)
3481 {
3482
3483         /*
3484          * Pull fields that are valid for peripheral drivers to set
3485          * into the dst CCB along with the CCB "payload".
3486          */
3487         dst_ccb->ccb_h.retry_count = src_ccb->ccb_h.retry_count;
3488         dst_ccb->ccb_h.func_code = src_ccb->ccb_h.func_code;
3489         dst_ccb->ccb_h.timeout = src_ccb->ccb_h.timeout;
3490         dst_ccb->ccb_h.flags = src_ccb->ccb_h.flags;
3491         bcopy(&(&src_ccb->ccb_h)[1], &(&dst_ccb->ccb_h)[1],
3492               sizeof(union ccb) - sizeof(struct ccb_hdr));
3493 }
3494
3495 void
3496 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3497                     u_int32_t priority, u_int32_t flags)
3498 {
3499
3500         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3501         ccb_h->pinfo.priority = priority;
3502         ccb_h->path = path;
3503         ccb_h->path_id = path->bus->path_id;
3504         if (path->target)
3505                 ccb_h->target_id = path->target->target_id;
3506         else
3507                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3508         if (path->device) {
3509                 ccb_h->target_lun = path->device->lun_id;
3510                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3511         } else {
3512                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3513         }
3514         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3515         ccb_h->flags = flags;
3516         ccb_h->xflags = 0;
3517 }
3518
3519 void
3520 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3521 {
3522         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3523 }
3524
3525 /* Path manipulation functions */
3526 cam_status
3527 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3528                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3529 {
3530         struct     cam_path *path;
3531         cam_status status;
3532
3533         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3534
3535         if (path == NULL) {
3536                 status = CAM_RESRC_UNAVAIL;
3537                 return(status);
3538         }
3539         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3540         if (status != CAM_REQ_CMP) {
3541                 free(path, M_CAMPATH);
3542                 path = NULL;
3543         }
3544         *new_path_ptr = path;
3545         return (status);
3546 }
3547
3548 cam_status
3549 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3550                          struct cam_periph *periph, path_id_t path_id,
3551                          target_id_t target_id, lun_id_t lun_id)
3552 {
3553
3554         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3555             lun_id));
3556 }
3557
3558 cam_status
3559 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3560                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3561 {
3562         struct       cam_eb *bus;
3563         struct       cam_et *target;
3564         struct       cam_ed *device;
3565         cam_status   status;
3566
3567         status = CAM_REQ_CMP;   /* Completed without error */
3568         target = NULL;          /* Wildcarded */
3569         device = NULL;          /* Wildcarded */
3570
3571         /*
3572          * We will potentially modify the EDT, so block interrupts
3573          * that may attempt to create cam paths.
3574          */
3575         bus = xpt_find_bus(path_id);
3576         if (bus == NULL) {
3577                 status = CAM_PATH_INVALID;
3578         } else {
3579                 xpt_lock_buses();
3580                 mtx_lock(&bus->eb_mtx);
3581                 target = xpt_find_target(bus, target_id);
3582                 if (target == NULL) {
3583                         /* Create one */
3584                         struct cam_et *new_target;
3585
3586                         new_target = xpt_alloc_target(bus, target_id);
3587                         if (new_target == NULL) {
3588                                 status = CAM_RESRC_UNAVAIL;
3589                         } else {
3590                                 target = new_target;
3591                         }
3592                 }
3593                 xpt_unlock_buses();
3594                 if (target != NULL) {
3595                         device = xpt_find_device(target, lun_id);
3596                         if (device == NULL) {
3597                                 /* Create one */
3598                                 struct cam_ed *new_device;
3599
3600                                 new_device =
3601                                     (*(bus->xport->ops->alloc_device))(bus,
3602                                                                        target,
3603                                                                        lun_id);
3604                                 if (new_device == NULL) {
3605                                         status = CAM_RESRC_UNAVAIL;
3606                                 } else {
3607                                         device = new_device;
3608                                 }
3609                         }
3610                 }
3611                 mtx_unlock(&bus->eb_mtx);
3612         }
3613
3614         /*
3615          * Only touch the user's data if we are successful.
3616          */
3617         if (status == CAM_REQ_CMP) {
3618                 new_path->periph = perph;
3619                 new_path->bus = bus;
3620                 new_path->target = target;
3621                 new_path->device = device;
3622                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3623         } else {
3624                 if (device != NULL)
3625                         xpt_release_device(device);
3626                 if (target != NULL)
3627                         xpt_release_target(target);
3628                 if (bus != NULL)
3629                         xpt_release_bus(bus);
3630         }
3631         return (status);
3632 }
3633
3634 int
3635 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3636 {
3637         struct     cam_path *new_path;
3638
3639         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3640         if (new_path == NULL)
3641                 return (ENOMEM);
3642         *new_path = *path;
3643         if (path->bus != NULL)
3644                 xpt_acquire_bus(path->bus);
3645         if (path->target != NULL)
3646                 xpt_acquire_target(path->target);
3647         if (path->device != NULL)
3648                 xpt_acquire_device(path->device);
3649         *new_path_ptr = new_path;
3650         return (0);
3651 }
3652
3653 void
3654 xpt_release_path(struct cam_path *path)
3655 {
3656         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3657         if (path->device != NULL) {
3658                 xpt_release_device(path->device);
3659                 path->device = NULL;
3660         }
3661         if (path->target != NULL) {
3662                 xpt_release_target(path->target);
3663                 path->target = NULL;
3664         }
3665         if (path->bus != NULL) {
3666                 xpt_release_bus(path->bus);
3667                 path->bus = NULL;
3668         }
3669 }
3670
3671 void
3672 xpt_free_path(struct cam_path *path)
3673 {
3674
3675         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3676         xpt_release_path(path);
3677         free(path, M_CAMPATH);
3678 }
3679
3680 void
3681 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3682     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3683 {
3684
3685         xpt_lock_buses();
3686         if (bus_ref) {
3687                 if (path->bus)
3688                         *bus_ref = path->bus->refcount;
3689                 else
3690                         *bus_ref = 0;
3691         }
3692         if (periph_ref) {
3693                 if (path->periph)
3694                         *periph_ref = path->periph->refcount;
3695                 else
3696                         *periph_ref = 0;
3697         }
3698         xpt_unlock_buses();
3699         if (target_ref) {
3700                 if (path->target)
3701                         *target_ref = path->target->refcount;
3702                 else
3703                         *target_ref = 0;
3704         }
3705         if (device_ref) {
3706                 if (path->device)
3707                         *device_ref = path->device->refcount;
3708                 else
3709                         *device_ref = 0;
3710         }
3711 }
3712
3713 /*
3714  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3715  * in path1, 2 for match with wildcards in path2.
3716  */
3717 int
3718 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3719 {
3720         int retval = 0;
3721
3722         if (path1->bus != path2->bus) {
3723                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3724                         retval = 1;
3725                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3726                         retval = 2;
3727                 else
3728                         return (-1);
3729         }
3730         if (path1->target != path2->target) {
3731                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3732                         if (retval == 0)
3733                                 retval = 1;
3734                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3735                         retval = 2;
3736                 else
3737                         return (-1);
3738         }
3739         if (path1->device != path2->device) {
3740                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3741                         if (retval == 0)
3742                                 retval = 1;
3743                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3744                         retval = 2;
3745                 else
3746                         return (-1);
3747         }
3748         return (retval);
3749 }
3750
3751 int
3752 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3753 {
3754         int retval = 0;
3755
3756         if (path->bus != dev->target->bus) {
3757                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3758                         retval = 1;
3759                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3760                         retval = 2;
3761                 else
3762                         return (-1);
3763         }
3764         if (path->target != dev->target) {
3765                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3766                         if (retval == 0)
3767                                 retval = 1;
3768                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3769                         retval = 2;
3770                 else
3771                         return (-1);
3772         }
3773         if (path->device != dev) {
3774                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3775                         if (retval == 0)
3776                                 retval = 1;
3777                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3778                         retval = 2;
3779                 else
3780                         return (-1);
3781         }
3782         return (retval);
3783 }
3784
3785 void
3786 xpt_print_path(struct cam_path *path)
3787 {
3788         struct sbuf sb;
3789         char buffer[XPT_PRINT_LEN];
3790
3791         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3792         xpt_path_sbuf(path, &sb);
3793         sbuf_finish(&sb);
3794         printf("%s", sbuf_data(&sb));
3795         sbuf_delete(&sb);
3796 }
3797
3798 void
3799 xpt_print_device(struct cam_ed *device)
3800 {
3801
3802         if (device == NULL)
3803                 printf("(nopath): ");
3804         else {
3805                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3806                        device->sim->unit_number,
3807                        device->sim->bus_id,
3808                        device->target->target_id,
3809                        (uintmax_t)device->lun_id);
3810         }
3811 }
3812
3813 void
3814 xpt_print(struct cam_path *path, const char *fmt, ...)
3815 {
3816         va_list ap;
3817         struct sbuf sb;
3818         char buffer[XPT_PRINT_LEN];
3819
3820         sbuf_new(&sb, buffer, XPT_PRINT_LEN, SBUF_FIXEDLEN);
3821
3822         xpt_path_sbuf(path, &sb);
3823         va_start(ap, fmt);
3824         sbuf_vprintf(&sb, fmt, ap);
3825         va_end(ap);
3826
3827         sbuf_finish(&sb);
3828         printf("%s", sbuf_data(&sb));
3829         sbuf_delete(&sb);
3830 }
3831
3832 int
3833 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3834 {
3835         struct sbuf sb;
3836         int len;
3837
3838         sbuf_new(&sb, str, str_len, 0);
3839         len = xpt_path_sbuf(path, &sb);
3840         sbuf_finish(&sb);
3841         return (len);
3842 }
3843
3844 int
3845 xpt_path_sbuf(struct cam_path *path, struct sbuf *sb)
3846 {
3847
3848         if (path == NULL)
3849                 sbuf_printf(sb, "(nopath): ");
3850         else {
3851                 if (path->periph != NULL)
3852                         sbuf_printf(sb, "(%s%d:", path->periph->periph_name,
3853                                     path->periph->unit_number);
3854                 else
3855                         sbuf_printf(sb, "(noperiph:");
3856
3857                 if (path->bus != NULL)
3858                         sbuf_printf(sb, "%s%d:%d:", path->bus->sim->sim_name,
3859                                     path->bus->sim->unit_number,
3860                                     path->bus->sim->bus_id);
3861                 else
3862                         sbuf_printf(sb, "nobus:");
3863
3864                 if (path->target != NULL)
3865                         sbuf_printf(sb, "%d:", path->target->target_id);
3866                 else
3867                         sbuf_printf(sb, "X:");
3868
3869                 if (path->device != NULL)
3870                         sbuf_printf(sb, "%jx): ",
3871                             (uintmax_t)path->device->lun_id);
3872                 else
3873                         sbuf_printf(sb, "X): ");
3874         }
3875
3876         return(sbuf_len(sb));
3877 }
3878
3879 path_id_t
3880 xpt_path_path_id(struct cam_path *path)
3881 {
3882         return(path->bus->path_id);
3883 }
3884
3885 target_id_t
3886 xpt_path_target_id(struct cam_path *path)
3887 {
3888         if (path->target != NULL)
3889                 return (path->target->target_id);
3890         else
3891                 return (CAM_TARGET_WILDCARD);
3892 }
3893
3894 lun_id_t
3895 xpt_path_lun_id(struct cam_path *path)
3896 {
3897         if (path->device != NULL)
3898                 return (path->device->lun_id);
3899         else
3900                 return (CAM_LUN_WILDCARD);
3901 }
3902
3903 struct cam_sim *
3904 xpt_path_sim(struct cam_path *path)
3905 {
3906
3907         return (path->bus->sim);
3908 }
3909
3910 struct cam_periph*
3911 xpt_path_periph(struct cam_path *path)
3912 {
3913
3914         return (path->periph);
3915 }
3916
3917 /*
3918  * Release a CAM control block for the caller.  Remit the cost of the structure
3919  * to the device referenced by the path.  If the this device had no 'credits'
3920  * and peripheral drivers have registered async callbacks for this notification
3921  * call them now.
3922  */
3923 void
3924 xpt_release_ccb(union ccb *free_ccb)
3925 {
3926         struct   cam_ed *device;
3927         struct   cam_periph *periph;
3928
3929         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3930         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3931         device = free_ccb->ccb_h.path->device;
3932         periph = free_ccb->ccb_h.path->periph;
3933
3934         xpt_free_ccb(free_ccb);
3935         periph->periph_allocated--;
3936         cam_ccbq_release_opening(&device->ccbq);
3937         xpt_run_allocq(periph, 0);
3938 }
3939
3940 /* Functions accessed by SIM drivers */
3941
3942 static struct xpt_xport_ops xport_default_ops = {
3943         .alloc_device = xpt_alloc_device_default,
3944         .action = xpt_action_default,
3945         .async = xpt_dev_async_default,
3946 };
3947 static struct xpt_xport xport_default = {
3948         .xport = XPORT_UNKNOWN,
3949         .name = "unknown",
3950         .ops = &xport_default_ops,
3951 };
3952
3953 CAM_XPT_XPORT(xport_default);
3954
3955 /*
3956  * A sim structure, listing the SIM entry points and instance
3957  * identification info is passed to xpt_bus_register to hook the SIM
3958  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
3959  * for this new bus and places it in the array of buses and assigns
3960  * it a path_id.  The path_id may be influenced by "hard wiring"
3961  * information specified by the user.  Once interrupt services are
3962  * available, the bus will be probed.
3963  */
3964 int
3965 xpt_bus_register(struct cam_sim *sim, device_t parent, uint32_t bus)
3966 {
3967         struct cam_eb *new_bus;
3968         struct cam_eb *old_bus;
3969         struct ccb_pathinq cpi;
3970         struct cam_path *path;
3971         cam_status status;
3972
3973         sim->bus_id = bus;
3974         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3975                                           M_CAMXPT, M_NOWAIT|M_ZERO);
3976         if (new_bus == NULL) {
3977                 /* Couldn't satisfy request */
3978                 return (ENOMEM);
3979         }
3980
3981         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
3982         TAILQ_INIT(&new_bus->et_entries);
3983         cam_sim_hold(sim);
3984         new_bus->sim = sim;
3985         timevalclear(&new_bus->last_reset);
3986         new_bus->flags = 0;
3987         new_bus->refcount = 1;  /* Held until a bus_deregister event */
3988         new_bus->generation = 0;
3989         new_bus->parent_dev = parent;
3990
3991         xpt_lock_buses();
3992         sim->path_id = new_bus->path_id =
3993             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3994         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3995         while (old_bus != NULL
3996             && old_bus->path_id < new_bus->path_id)
3997                 old_bus = TAILQ_NEXT(old_bus, links);
3998         if (old_bus != NULL)
3999                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4000         else
4001                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
4002         xsoftc.bus_generation++;
4003         xpt_unlock_buses();
4004
4005         /*
4006          * Set a default transport so that a PATH_INQ can be issued to
4007          * the SIM.  This will then allow for probing and attaching of
4008          * a more appropriate transport.
4009          */
4010         new_bus->xport = &xport_default;
4011
4012         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
4013                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4014         if (status != CAM_REQ_CMP) {
4015                 xpt_release_bus(new_bus);
4016                 return (ENOMEM);
4017         }
4018
4019         xpt_path_inq(&cpi, path);
4020
4021         if (cpi.ccb_h.status == CAM_REQ_CMP) {
4022                 struct xpt_xport **xpt;
4023
4024                 SET_FOREACH(xpt, cam_xpt_xport_set) {
4025                         if ((*xpt)->xport == cpi.transport) {
4026                                 new_bus->xport = *xpt;
4027                                 break;
4028                         }
4029                 }
4030                 if (new_bus->xport == NULL) {
4031                         xpt_print(path,
4032                             "No transport found for %d\n", cpi.transport);
4033                         xpt_release_bus(new_bus);
4034                         free(path, M_CAMXPT);
4035                         return (EINVAL);
4036                 }
4037         }
4038
4039         /* Notify interested parties */
4040         if (sim->path_id != CAM_XPT_PATH_ID) {
4041                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
4042                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
4043                         union   ccb *scan_ccb;
4044
4045                         /* Initiate bus rescan. */
4046                         scan_ccb = xpt_alloc_ccb_nowait();
4047                         if (scan_ccb != NULL) {
4048                                 scan_ccb->ccb_h.path = path;
4049                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
4050                                 scan_ccb->crcn.flags = 0;
4051                                 xpt_rescan(scan_ccb);
4052                         } else {
4053                                 xpt_print(path,
4054                                           "Can't allocate CCB to scan bus\n");
4055                                 xpt_free_path(path);
4056                         }
4057                 } else
4058                         xpt_free_path(path);
4059         } else
4060                 xpt_free_path(path);
4061         return (CAM_SUCCESS);
4062 }
4063
4064 int
4065 xpt_bus_deregister(path_id_t pathid)
4066 {
4067         struct cam_path bus_path;
4068         cam_status status;
4069
4070         status = xpt_compile_path(&bus_path, NULL, pathid,
4071                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4072         if (status != CAM_REQ_CMP)
4073                 return (ENOMEM);
4074
4075         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4076         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4077
4078         /* Release the reference count held while registered. */
4079         xpt_release_bus(bus_path.bus);
4080         xpt_release_path(&bus_path);
4081
4082         return (CAM_SUCCESS);
4083 }
4084
4085 static path_id_t
4086 xptnextfreepathid(void)
4087 {
4088         struct cam_eb *bus;
4089         path_id_t pathid;
4090         const char *strval;
4091
4092         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4093         pathid = 0;
4094         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4095 retry:
4096         /* Find an unoccupied pathid */
4097         while (bus != NULL && bus->path_id <= pathid) {
4098                 if (bus->path_id == pathid)
4099                         pathid++;
4100                 bus = TAILQ_NEXT(bus, links);
4101         }
4102
4103         /*
4104          * Ensure that this pathid is not reserved for
4105          * a bus that may be registered in the future.
4106          */
4107         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4108                 ++pathid;
4109                 /* Start the search over */
4110                 goto retry;
4111         }
4112         return (pathid);
4113 }
4114
4115 static path_id_t
4116 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4117 {
4118         path_id_t pathid;
4119         int i, dunit, val;
4120         char buf[32];
4121         const char *dname;
4122
4123         pathid = CAM_XPT_PATH_ID;
4124         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4125         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4126                 return (pathid);
4127         i = 0;
4128         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4129                 if (strcmp(dname, "scbus")) {
4130                         /* Avoid a bit of foot shooting. */
4131                         continue;
4132                 }
4133                 if (dunit < 0)          /* unwired?! */
4134                         continue;
4135                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4136                         if (sim_bus == val) {
4137                                 pathid = dunit;
4138                                 break;
4139                         }
4140                 } else if (sim_bus == 0) {
4141                         /* Unspecified matches bus 0 */
4142                         pathid = dunit;
4143                         break;
4144                 } else {
4145                         printf("Ambiguous scbus configuration for %s%d "
4146                                "bus %d, cannot wire down.  The kernel "
4147                                "config entry for scbus%d should "
4148                                "specify a controller bus.\n"
4149                                "Scbus will be assigned dynamically.\n",
4150                                sim_name, sim_unit, sim_bus, dunit);
4151                         break;
4152                 }
4153         }
4154
4155         if (pathid == CAM_XPT_PATH_ID)
4156                 pathid = xptnextfreepathid();
4157         return (pathid);
4158 }
4159
4160 static const char *
4161 xpt_async_string(u_int32_t async_code)
4162 {
4163
4164         switch (async_code) {
4165         case AC_BUS_RESET: return ("AC_BUS_RESET");
4166         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4167         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4168         case AC_SENT_BDR: return ("AC_SENT_BDR");
4169         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4170         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4171         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4172         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4173         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4174         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4175         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4176         case AC_CONTRACT: return ("AC_CONTRACT");
4177         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4178         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4179         }
4180         return ("AC_UNKNOWN");
4181 }
4182
4183 static int
4184 xpt_async_size(u_int32_t async_code)
4185 {
4186
4187         switch (async_code) {
4188         case AC_BUS_RESET: return (0);
4189         case AC_UNSOL_RESEL: return (0);
4190         case AC_SCSI_AEN: return (0);
4191         case AC_SENT_BDR: return (0);
4192         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4193         case AC_PATH_DEREGISTERED: return (0);
4194         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4195         case AC_LOST_DEVICE: return (0);
4196         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4197         case AC_INQ_CHANGED: return (0);
4198         case AC_GETDEV_CHANGED: return (0);
4199         case AC_CONTRACT: return (sizeof(struct ac_contract));
4200         case AC_ADVINFO_CHANGED: return (-1);
4201         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4202         }
4203         return (0);
4204 }
4205
4206 static int
4207 xpt_async_process_dev(struct cam_ed *device, void *arg)
4208 {
4209         union ccb *ccb = arg;
4210         struct cam_path *path = ccb->ccb_h.path;
4211         void *async_arg = ccb->casync.async_arg_ptr;
4212         u_int32_t async_code = ccb->casync.async_code;
4213         int relock;
4214
4215         if (path->device != device
4216          && path->device->lun_id != CAM_LUN_WILDCARD
4217          && device->lun_id != CAM_LUN_WILDCARD)
4218                 return (1);
4219
4220         /*
4221          * The async callback could free the device.
4222          * If it is a broadcast async, it doesn't hold
4223          * device reference, so take our own reference.
4224          */
4225         xpt_acquire_device(device);
4226
4227         /*
4228          * If async for specific device is to be delivered to
4229          * the wildcard client, take the specific device lock.
4230          * XXX: We may need a way for client to specify it.
4231          */
4232         if ((device->lun_id == CAM_LUN_WILDCARD &&
4233              path->device->lun_id != CAM_LUN_WILDCARD) ||
4234             (device->target->target_id == CAM_TARGET_WILDCARD &&
4235              path->target->target_id != CAM_TARGET_WILDCARD) ||
4236             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4237              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4238                 mtx_unlock(&device->device_mtx);
4239                 xpt_path_lock(path);
4240                 relock = 1;
4241         } else
4242                 relock = 0;
4243
4244         (*(device->target->bus->xport->ops->async))(async_code,
4245             device->target->bus, device->target, device, async_arg);
4246         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4247
4248         if (relock) {
4249                 xpt_path_unlock(path);
4250                 mtx_lock(&device->device_mtx);
4251         }
4252         xpt_release_device(device);
4253         return (1);
4254 }
4255
4256 static int
4257 xpt_async_process_tgt(struct cam_et *target, void *arg)
4258 {
4259         union ccb *ccb = arg;
4260         struct cam_path *path = ccb->ccb_h.path;
4261
4262         if (path->target != target
4263          && path->target->target_id != CAM_TARGET_WILDCARD
4264          && target->target_id != CAM_TARGET_WILDCARD)
4265                 return (1);
4266
4267         if (ccb->casync.async_code == AC_SENT_BDR) {
4268                 /* Update our notion of when the last reset occurred */
4269                 microtime(&target->last_reset);
4270         }
4271
4272         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4273 }
4274
4275 static void
4276 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4277 {
4278         struct cam_eb *bus;
4279         struct cam_path *path;
4280         void *async_arg;
4281         u_int32_t async_code;
4282
4283         path = ccb->ccb_h.path;
4284         async_code = ccb->casync.async_code;
4285         async_arg = ccb->casync.async_arg_ptr;
4286         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4287             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4288         bus = path->bus;
4289
4290         if (async_code == AC_BUS_RESET) {
4291                 /* Update our notion of when the last reset occurred */
4292                 microtime(&bus->last_reset);
4293         }
4294
4295         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4296
4297         /*
4298          * If this wasn't a fully wildcarded async, tell all
4299          * clients that want all async events.
4300          */
4301         if (bus != xpt_periph->path->bus) {
4302                 xpt_path_lock(xpt_periph->path);
4303                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4304                 xpt_path_unlock(xpt_periph->path);
4305         }
4306
4307         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4308                 xpt_release_devq(path, 1, TRUE);
4309         else
4310                 xpt_release_simq(path->bus->sim, TRUE);
4311         if (ccb->casync.async_arg_size > 0)
4312                 free(async_arg, M_CAMXPT);
4313         xpt_free_path(path);
4314         xpt_free_ccb(ccb);
4315 }
4316
4317 static void
4318 xpt_async_bcast(struct async_list *async_head,
4319                 u_int32_t async_code,
4320                 struct cam_path *path, void *async_arg)
4321 {
4322         struct async_node *cur_entry;
4323         struct mtx *mtx;
4324
4325         cur_entry = SLIST_FIRST(async_head);
4326         while (cur_entry != NULL) {
4327                 struct async_node *next_entry;
4328                 /*
4329                  * Grab the next list entry before we call the current
4330                  * entry's callback.  This is because the callback function
4331                  * can delete its async callback entry.
4332                  */
4333                 next_entry = SLIST_NEXT(cur_entry, links);
4334                 if ((cur_entry->event_enable & async_code) != 0) {
4335                         mtx = cur_entry->event_lock ?
4336                             path->device->sim->mtx : NULL;
4337                         if (mtx)
4338                                 mtx_lock(mtx);
4339                         cur_entry->callback(cur_entry->callback_arg,
4340                                             async_code, path,
4341                                             async_arg);
4342                         if (mtx)
4343                                 mtx_unlock(mtx);
4344                 }
4345                 cur_entry = next_entry;
4346         }
4347 }
4348
4349 void
4350 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4351 {
4352         union ccb *ccb;
4353         int size;
4354
4355         ccb = xpt_alloc_ccb_nowait();
4356         if (ccb == NULL) {
4357                 xpt_print(path, "Can't allocate CCB to send %s\n",
4358                     xpt_async_string(async_code));
4359                 return;
4360         }
4361
4362         if (xpt_clone_path(&ccb->ccb_h.path, path) != 0) {
4363                 xpt_print(path, "Can't allocate path to send %s\n",
4364                     xpt_async_string(async_code));
4365                 xpt_free_ccb(ccb);
4366                 return;
4367         }
4368         ccb->ccb_h.path->periph = NULL;
4369         ccb->ccb_h.func_code = XPT_ASYNC;
4370         ccb->ccb_h.cbfcnp = xpt_async_process;
4371         ccb->ccb_h.flags |= CAM_UNLOCKED;
4372         ccb->casync.async_code = async_code;
4373         ccb->casync.async_arg_size = 0;
4374         size = xpt_async_size(async_code);
4375         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
4376             ("xpt_async: func %#x %s aync_code %d %s\n",
4377                 ccb->ccb_h.func_code,
4378                 xpt_action_name(ccb->ccb_h.func_code),
4379                 async_code,
4380                 xpt_async_string(async_code)));
4381         if (size > 0 && async_arg != NULL) {
4382                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4383                 if (ccb->casync.async_arg_ptr == NULL) {
4384                         xpt_print(path, "Can't allocate argument to send %s\n",
4385                             xpt_async_string(async_code));
4386                         xpt_free_path(ccb->ccb_h.path);
4387                         xpt_free_ccb(ccb);
4388                         return;
4389                 }
4390                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4391                 ccb->casync.async_arg_size = size;
4392         } else if (size < 0) {
4393                 ccb->casync.async_arg_ptr = async_arg;
4394                 ccb->casync.async_arg_size = size;
4395         }
4396         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4397                 xpt_freeze_devq(path, 1);
4398         else
4399                 xpt_freeze_simq(path->bus->sim, 1);
4400         xpt_action(ccb);
4401 }
4402
4403 static void
4404 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4405                       struct cam_et *target, struct cam_ed *device,
4406                       void *async_arg)
4407 {
4408
4409         /*
4410          * We only need to handle events for real devices.
4411          */
4412         if (target->target_id == CAM_TARGET_WILDCARD
4413          || device->lun_id == CAM_LUN_WILDCARD)
4414                 return;
4415
4416         printf("%s called\n", __func__);
4417 }
4418
4419 static uint32_t
4420 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4421 {
4422         struct cam_devq *devq;
4423         uint32_t freeze;
4424
4425         devq = dev->sim->devq;
4426         mtx_assert(&devq->send_mtx, MA_OWNED);
4427         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4428             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4429             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4430         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4431         /* Remove frozen device from sendq. */
4432         if (device_is_queued(dev))
4433                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4434         return (freeze);
4435 }
4436
4437 u_int32_t
4438 xpt_freeze_devq(struct cam_path *path, u_int count)
4439 {
4440         struct cam_ed   *dev = path->device;
4441         struct cam_devq *devq;
4442         uint32_t         freeze;
4443
4444         devq = dev->sim->devq;
4445         mtx_lock(&devq->send_mtx);
4446         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4447         freeze = xpt_freeze_devq_device(dev, count);
4448         mtx_unlock(&devq->send_mtx);
4449         return (freeze);
4450 }
4451
4452 u_int32_t
4453 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4454 {
4455         struct cam_devq *devq;
4456         uint32_t         freeze;
4457
4458         devq = sim->devq;
4459         mtx_lock(&devq->send_mtx);
4460         freeze = (devq->send_queue.qfrozen_cnt += count);
4461         mtx_unlock(&devq->send_mtx);
4462         return (freeze);
4463 }
4464
4465 static void
4466 xpt_release_devq_timeout(void *arg)
4467 {
4468         struct cam_ed *dev;
4469         struct cam_devq *devq;
4470
4471         dev = (struct cam_ed *)arg;
4472         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4473         devq = dev->sim->devq;
4474         mtx_assert(&devq->send_mtx, MA_OWNED);
4475         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4476                 xpt_run_devq(devq);
4477 }
4478
4479 void
4480 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4481 {
4482         struct cam_ed *dev;
4483         struct cam_devq *devq;
4484
4485         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4486             count, run_queue));
4487         dev = path->device;
4488         devq = dev->sim->devq;
4489         mtx_lock(&devq->send_mtx);
4490         if (xpt_release_devq_device(dev, count, run_queue))
4491                 xpt_run_devq(dev->sim->devq);
4492         mtx_unlock(&devq->send_mtx);
4493 }
4494
4495 static int
4496 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4497 {
4498
4499         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4500         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4501             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4502             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4503         if (count > dev->ccbq.queue.qfrozen_cnt) {
4504 #ifdef INVARIANTS
4505                 printf("xpt_release_devq(): requested %u > present %u\n",
4506                     count, dev->ccbq.queue.qfrozen_cnt);
4507 #endif
4508                 count = dev->ccbq.queue.qfrozen_cnt;
4509         }
4510         dev->ccbq.queue.qfrozen_cnt -= count;
4511         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4512                 /*
4513                  * No longer need to wait for a successful
4514                  * command completion.
4515                  */
4516                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4517                 /*
4518                  * Remove any timeouts that might be scheduled
4519                  * to release this queue.
4520                  */
4521                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4522                         callout_stop(&dev->callout);
4523                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4524                 }
4525                 /*
4526                  * Now that we are unfrozen schedule the
4527                  * device so any pending transactions are
4528                  * run.
4529                  */
4530                 xpt_schedule_devq(dev->sim->devq, dev);
4531         } else
4532                 run_queue = 0;
4533         return (run_queue);
4534 }
4535
4536 void
4537 xpt_release_simq(struct cam_sim *sim, int run_queue)
4538 {
4539         struct cam_devq *devq;
4540
4541         devq = sim->devq;
4542         mtx_lock(&devq->send_mtx);
4543         if (devq->send_queue.qfrozen_cnt <= 0) {
4544 #ifdef INVARIANTS
4545                 printf("xpt_release_simq: requested 1 > present %u\n",
4546                     devq->send_queue.qfrozen_cnt);
4547 #endif
4548         } else
4549                 devq->send_queue.qfrozen_cnt--;
4550         if (devq->send_queue.qfrozen_cnt == 0) {
4551                 if (run_queue) {
4552                         /*
4553                          * Now that we are unfrozen run the send queue.
4554                          */
4555                         xpt_run_devq(sim->devq);
4556                 }
4557         }
4558         mtx_unlock(&devq->send_mtx);
4559 }
4560
4561 void
4562 xpt_done(union ccb *done_ccb)
4563 {
4564         struct cam_doneq *queue;
4565         int     run, hash;
4566
4567 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4568         if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4569             done_ccb->csio.bio != NULL)
4570                 biotrack(done_ccb->csio.bio, __func__);
4571 #endif
4572
4573         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4574             ("xpt_done: func= %#x %s status %#x\n",
4575                 done_ccb->ccb_h.func_code,
4576                 xpt_action_name(done_ccb->ccb_h.func_code),
4577                 done_ccb->ccb_h.status));
4578         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4579                 return;
4580
4581         /* Store the time the ccb was in the sim */
4582         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4583         done_ccb->ccb_h.status |= CAM_QOS_VALID;
4584         hash = (u_int)(done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4585             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4586         queue = &cam_doneqs[hash];
4587         mtx_lock(&queue->cam_doneq_mtx);
4588         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4589         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4590         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4591         mtx_unlock(&queue->cam_doneq_mtx);
4592         if (run && !dumping)
4593                 wakeup(&queue->cam_doneq);
4594 }
4595
4596 void
4597 xpt_done_direct(union ccb *done_ccb)
4598 {
4599
4600         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4601             ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4602         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4603                 return;
4604
4605         /* Store the time the ccb was in the sim */
4606         done_ccb->ccb_h.qos.periph_data = cam_iosched_delta_t(done_ccb->ccb_h.qos.periph_data);
4607         done_ccb->ccb_h.status |= CAM_QOS_VALID;
4608         xpt_done_process(&done_ccb->ccb_h);
4609 }
4610
4611 union ccb *
4612 xpt_alloc_ccb(void)
4613 {
4614         union ccb *new_ccb;
4615
4616         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4617         return (new_ccb);
4618 }
4619
4620 union ccb *
4621 xpt_alloc_ccb_nowait(void)
4622 {
4623         union ccb *new_ccb;
4624
4625         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4626         return (new_ccb);
4627 }
4628
4629 void
4630 xpt_free_ccb(union ccb *free_ccb)
4631 {
4632         struct cam_periph *periph;
4633
4634         if (free_ccb->ccb_h.alloc_flags & CAM_CCB_FROM_UMA) {
4635                 /*
4636                  * Looks like a CCB allocated from a periph UMA zone.
4637                  */
4638                 periph = free_ccb->ccb_h.path->periph;
4639                 uma_zfree(periph->ccb_zone, free_ccb);
4640         } else {
4641                 free(free_ccb, M_CAMCCB);
4642         }
4643 }
4644
4645 /* Private XPT functions */
4646
4647 /*
4648  * Get a CAM control block for the caller. Charge the structure to the device
4649  * referenced by the path.  If we don't have sufficient resources to allocate
4650  * more ccbs, we return NULL.
4651  */
4652 static union ccb *
4653 xpt_get_ccb_nowait(struct cam_periph *periph)
4654 {
4655         union ccb *new_ccb;
4656         int alloc_flags;
4657
4658         if (periph->ccb_zone != NULL) {
4659                 alloc_flags = CAM_CCB_FROM_UMA;
4660                 new_ccb = uma_zalloc(periph->ccb_zone, M_ZERO|M_NOWAIT);
4661         } else {
4662                 alloc_flags = 0;
4663                 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4664         }
4665         if (new_ccb == NULL)
4666                 return (NULL);
4667         new_ccb->ccb_h.alloc_flags = alloc_flags;
4668         periph->periph_allocated++;
4669         cam_ccbq_take_opening(&periph->path->device->ccbq);
4670         return (new_ccb);
4671 }
4672
4673 static union ccb *
4674 xpt_get_ccb(struct cam_periph *periph)
4675 {
4676         union ccb *new_ccb;
4677         int alloc_flags;
4678
4679         cam_periph_unlock(periph);
4680         if (periph->ccb_zone != NULL) {
4681                 alloc_flags = CAM_CCB_FROM_UMA;
4682                 new_ccb = uma_zalloc(periph->ccb_zone, M_ZERO|M_WAITOK);
4683         } else {
4684                 alloc_flags = 0;
4685                 new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4686         }
4687         new_ccb->ccb_h.alloc_flags = alloc_flags;
4688         cam_periph_lock(periph);
4689         periph->periph_allocated++;
4690         cam_ccbq_take_opening(&periph->path->device->ccbq);
4691         return (new_ccb);
4692 }
4693
4694 union ccb *
4695 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4696 {
4697         struct ccb_hdr *ccb_h;
4698
4699         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4700         cam_periph_assert(periph, MA_OWNED);
4701         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4702             ccb_h->pinfo.priority != priority) {
4703                 if (priority < periph->immediate_priority) {
4704                         periph->immediate_priority = priority;
4705                         xpt_run_allocq(periph, 0);
4706                 } else
4707                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4708                             "cgticb", 0);
4709         }
4710         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4711         return ((union ccb *)ccb_h);
4712 }
4713
4714 static void
4715 xpt_acquire_bus(struct cam_eb *bus)
4716 {
4717
4718         xpt_lock_buses();
4719         bus->refcount++;
4720         xpt_unlock_buses();
4721 }
4722
4723 static void
4724 xpt_release_bus(struct cam_eb *bus)
4725 {
4726
4727         xpt_lock_buses();
4728         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4729         if (--bus->refcount > 0) {
4730                 xpt_unlock_buses();
4731                 return;
4732         }
4733         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4734         xsoftc.bus_generation++;
4735         xpt_unlock_buses();
4736         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4737             ("destroying bus, but target list is not empty"));
4738         cam_sim_release(bus->sim);
4739         mtx_destroy(&bus->eb_mtx);
4740         free(bus, M_CAMXPT);
4741 }
4742
4743 static struct cam_et *
4744 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4745 {
4746         struct cam_et *cur_target, *target;
4747
4748         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4749         mtx_assert(&bus->eb_mtx, MA_OWNED);
4750         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4751                                          M_NOWAIT|M_ZERO);
4752         if (target == NULL)
4753                 return (NULL);
4754
4755         TAILQ_INIT(&target->ed_entries);
4756         target->bus = bus;
4757         target->target_id = target_id;
4758         target->refcount = 1;
4759         target->generation = 0;
4760         target->luns = NULL;
4761         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4762         timevalclear(&target->last_reset);
4763         /*
4764          * Hold a reference to our parent bus so it
4765          * will not go away before we do.
4766          */
4767         bus->refcount++;
4768
4769         /* Insertion sort into our bus's target list */
4770         cur_target = TAILQ_FIRST(&bus->et_entries);
4771         while (cur_target != NULL && cur_target->target_id < target_id)
4772                 cur_target = TAILQ_NEXT(cur_target, links);
4773         if (cur_target != NULL) {
4774                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4775         } else {
4776                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4777         }
4778         bus->generation++;
4779         return (target);
4780 }
4781
4782 static void
4783 xpt_acquire_target(struct cam_et *target)
4784 {
4785         struct cam_eb *bus = target->bus;
4786
4787         mtx_lock(&bus->eb_mtx);
4788         target->refcount++;
4789         mtx_unlock(&bus->eb_mtx);
4790 }
4791
4792 static void
4793 xpt_release_target(struct cam_et *target)
4794 {
4795         struct cam_eb *bus = target->bus;
4796
4797         mtx_lock(&bus->eb_mtx);
4798         if (--target->refcount > 0) {
4799                 mtx_unlock(&bus->eb_mtx);
4800                 return;
4801         }
4802         TAILQ_REMOVE(&bus->et_entries, target, links);
4803         bus->generation++;
4804         mtx_unlock(&bus->eb_mtx);
4805         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4806             ("destroying target, but device list is not empty"));
4807         xpt_release_bus(bus);
4808         mtx_destroy(&target->luns_mtx);
4809         if (target->luns)
4810                 free(target->luns, M_CAMXPT);
4811         free(target, M_CAMXPT);
4812 }
4813
4814 static struct cam_ed *
4815 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4816                          lun_id_t lun_id)
4817 {
4818         struct cam_ed *device;
4819
4820         device = xpt_alloc_device(bus, target, lun_id);
4821         if (device == NULL)
4822                 return (NULL);
4823
4824         device->mintags = 1;
4825         device->maxtags = 1;
4826         return (device);
4827 }
4828
4829 static void
4830 xpt_destroy_device(void *context, int pending)
4831 {
4832         struct cam_ed   *device = context;
4833
4834         mtx_lock(&device->device_mtx);
4835         mtx_destroy(&device->device_mtx);
4836         free(device, M_CAMDEV);
4837 }
4838
4839 struct cam_ed *
4840 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4841 {
4842         struct cam_ed   *cur_device, *device;
4843         struct cam_devq *devq;
4844         cam_status status;
4845
4846         mtx_assert(&bus->eb_mtx, MA_OWNED);
4847         /* Make space for us in the device queue on our bus */
4848         devq = bus->sim->devq;
4849         mtx_lock(&devq->send_mtx);
4850         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4851         mtx_unlock(&devq->send_mtx);
4852         if (status != CAM_REQ_CMP)
4853                 return (NULL);
4854
4855         device = (struct cam_ed *)malloc(sizeof(*device),
4856                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4857         if (device == NULL)
4858                 return (NULL);
4859
4860         cam_init_pinfo(&device->devq_entry);
4861         device->target = target;
4862         device->lun_id = lun_id;
4863         device->sim = bus->sim;
4864         if (cam_ccbq_init(&device->ccbq,
4865                           bus->sim->max_dev_openings) != 0) {
4866                 free(device, M_CAMDEV);
4867                 return (NULL);
4868         }
4869         SLIST_INIT(&device->asyncs);
4870         SLIST_INIT(&device->periphs);
4871         device->generation = 0;
4872         device->flags = CAM_DEV_UNCONFIGURED;
4873         device->tag_delay_count = 0;
4874         device->tag_saved_openings = 0;
4875         device->refcount = 1;
4876         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4877         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4878         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4879         /*
4880          * Hold a reference to our parent bus so it
4881          * will not go away before we do.
4882          */
4883         target->refcount++;
4884
4885         cur_device = TAILQ_FIRST(&target->ed_entries);
4886         while (cur_device != NULL && cur_device->lun_id < lun_id)
4887                 cur_device = TAILQ_NEXT(cur_device, links);
4888         if (cur_device != NULL)
4889                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4890         else
4891                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4892         target->generation++;
4893         return (device);
4894 }
4895
4896 void
4897 xpt_acquire_device(struct cam_ed *device)
4898 {
4899         struct cam_eb *bus = device->target->bus;
4900
4901         mtx_lock(&bus->eb_mtx);
4902         device->refcount++;
4903         mtx_unlock(&bus->eb_mtx);
4904 }
4905
4906 void
4907 xpt_release_device(struct cam_ed *device)
4908 {
4909         struct cam_eb *bus = device->target->bus;
4910         struct cam_devq *devq;
4911
4912         mtx_lock(&bus->eb_mtx);
4913         if (--device->refcount > 0) {
4914                 mtx_unlock(&bus->eb_mtx);
4915                 return;
4916         }
4917
4918         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4919         device->target->generation++;
4920         mtx_unlock(&bus->eb_mtx);
4921
4922         /* Release our slot in the devq */
4923         devq = bus->sim->devq;
4924         mtx_lock(&devq->send_mtx);
4925         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4926
4927         KASSERT(SLIST_EMPTY(&device->periphs),
4928             ("destroying device, but periphs list is not empty"));
4929         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4930             ("destroying device while still queued for ccbs"));
4931
4932         /* The send_mtx must be held when accessing the callout */
4933         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4934                 callout_stop(&device->callout);
4935
4936         mtx_unlock(&devq->send_mtx);
4937
4938         xpt_release_target(device->target);
4939
4940         cam_ccbq_fini(&device->ccbq);
4941         /*
4942          * Free allocated memory.  free(9) does nothing if the
4943          * supplied pointer is NULL, so it is safe to call without
4944          * checking.
4945          */
4946         free(device->supported_vpds, M_CAMXPT);
4947         free(device->device_id, M_CAMXPT);
4948         free(device->ext_inq, M_CAMXPT);
4949         free(device->physpath, M_CAMXPT);
4950         free(device->rcap_buf, M_CAMXPT);
4951         free(device->serial_num, M_CAMXPT);
4952         free(device->nvme_data, M_CAMXPT);
4953         free(device->nvme_cdata, M_CAMXPT);
4954         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4955 }
4956
4957 u_int32_t
4958 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4959 {
4960         int     result;
4961         struct  cam_ed *dev;
4962
4963         dev = path->device;
4964         mtx_lock(&dev->sim->devq->send_mtx);
4965         result = cam_ccbq_resize(&dev->ccbq, newopenings);
4966         mtx_unlock(&dev->sim->devq->send_mtx);
4967         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4968          || (dev->inq_flags & SID_CmdQue) != 0)
4969                 dev->tag_saved_openings = newopenings;
4970         return (result);
4971 }
4972
4973 static struct cam_eb *
4974 xpt_find_bus(path_id_t path_id)
4975 {
4976         struct cam_eb *bus;
4977
4978         xpt_lock_buses();
4979         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4980              bus != NULL;
4981              bus = TAILQ_NEXT(bus, links)) {
4982                 if (bus->path_id == path_id) {
4983                         bus->refcount++;
4984                         break;
4985                 }
4986         }
4987         xpt_unlock_buses();
4988         return (bus);
4989 }
4990
4991 static struct cam_et *
4992 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4993 {
4994         struct cam_et *target;
4995
4996         mtx_assert(&bus->eb_mtx, MA_OWNED);
4997         for (target = TAILQ_FIRST(&bus->et_entries);
4998              target != NULL;
4999              target = TAILQ_NEXT(target, links)) {
5000                 if (target->target_id == target_id) {
5001                         target->refcount++;
5002                         break;
5003                 }
5004         }
5005         return (target);
5006 }
5007
5008 static struct cam_ed *
5009 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
5010 {
5011         struct cam_ed *device;
5012
5013         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
5014         for (device = TAILQ_FIRST(&target->ed_entries);
5015              device != NULL;
5016              device = TAILQ_NEXT(device, links)) {
5017                 if (device->lun_id == lun_id) {
5018                         device->refcount++;
5019                         break;
5020                 }
5021         }
5022         return (device);
5023 }
5024
5025 void
5026 xpt_start_tags(struct cam_path *path)
5027 {
5028         struct ccb_relsim crs;
5029         struct cam_ed *device;
5030         struct cam_sim *sim;
5031         int    newopenings;
5032
5033         device = path->device;
5034         sim = path->bus->sim;
5035         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5036         xpt_freeze_devq(path, /*count*/1);
5037         device->inq_flags |= SID_CmdQue;
5038         if (device->tag_saved_openings != 0)
5039                 newopenings = device->tag_saved_openings;
5040         else
5041                 newopenings = min(device->maxtags,
5042                                   sim->max_tagged_dev_openings);
5043         xpt_dev_ccbq_resize(path, newopenings);
5044         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5045         memset(&crs, 0, sizeof(crs));
5046         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5047         crs.ccb_h.func_code = XPT_REL_SIMQ;
5048         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5049         crs.openings
5050             = crs.release_timeout
5051             = crs.qfrozen_cnt
5052             = 0;
5053         xpt_action((union ccb *)&crs);
5054 }
5055
5056 void
5057 xpt_stop_tags(struct cam_path *path)
5058 {
5059         struct ccb_relsim crs;
5060         struct cam_ed *device;
5061         struct cam_sim *sim;
5062
5063         device = path->device;
5064         sim = path->bus->sim;
5065         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5066         device->tag_delay_count = 0;
5067         xpt_freeze_devq(path, /*count*/1);
5068         device->inq_flags &= ~SID_CmdQue;
5069         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
5070         xpt_async(AC_GETDEV_CHANGED, path, NULL);
5071         memset(&crs, 0, sizeof(crs));
5072         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
5073         crs.ccb_h.func_code = XPT_REL_SIMQ;
5074         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5075         crs.openings
5076             = crs.release_timeout
5077             = crs.qfrozen_cnt
5078             = 0;
5079         xpt_action((union ccb *)&crs);
5080 }
5081
5082 /*
5083  * Assume all possible buses are detected by this time, so allow boot
5084  * as soon as they all are scanned.
5085  */
5086 static void
5087 xpt_boot_delay(void *arg)
5088 {
5089
5090         xpt_release_boot();
5091 }
5092
5093 /*
5094  * Now that all config hooks have completed, start boot_delay timer,
5095  * waiting for possibly still undetected buses (USB) to appear.
5096  */
5097 static void
5098 xpt_ch_done(void *arg)
5099 {
5100
5101         callout_init(&xsoftc.boot_callout, 1);
5102         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5103             xpt_boot_delay, NULL, 0);
5104 }
5105 SYSINIT(xpt_hw_delay, SI_SUB_INT_CONFIG_HOOKS, SI_ORDER_ANY, xpt_ch_done, NULL);
5106
5107 /*
5108  * Now that interrupts are enabled, go find our devices
5109  */
5110 static void
5111 xpt_config(void *arg)
5112 {
5113         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
5114                 printf("xpt_config: failed to create taskqueue thread.\n");
5115
5116         /* Setup debugging path */
5117         if (cam_dflags != CAM_DEBUG_NONE) {
5118                 if (xpt_create_path(&cam_dpath, NULL,
5119                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
5120                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
5121                         printf("xpt_config: xpt_create_path() failed for debug"
5122                                " target %d:%d:%d, debugging disabled\n",
5123                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
5124                         cam_dflags = CAM_DEBUG_NONE;
5125                 }
5126         } else
5127                 cam_dpath = NULL;
5128
5129         periphdriver_init(1);
5130         xpt_hold_boot();
5131
5132         /* Fire up rescan thread. */
5133         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5134             "cam", "scanner")) {
5135                 printf("xpt_config: failed to create rescan thread.\n");
5136         }
5137 }
5138
5139 void
5140 xpt_hold_boot_locked(void)
5141 {
5142
5143         if (xsoftc.buses_to_config++ == 0)
5144                 root_mount_hold_token("CAM", &xsoftc.xpt_rootmount);
5145 }
5146
5147 void
5148 xpt_hold_boot(void)
5149 {
5150
5151         xpt_lock_buses();
5152         xpt_hold_boot_locked();
5153         xpt_unlock_buses();
5154 }
5155
5156 void
5157 xpt_release_boot(void)
5158 {
5159
5160         xpt_lock_buses();
5161         if (--xsoftc.buses_to_config == 0) {
5162                 if (xsoftc.buses_config_done == 0) {
5163                         xsoftc.buses_config_done = 1;
5164                         xsoftc.buses_to_config++;
5165                         TASK_INIT(&xsoftc.boot_task, 0, xpt_finishconfig_task,
5166                             NULL);
5167                         taskqueue_enqueue(taskqueue_thread, &xsoftc.boot_task);
5168                 } else
5169                         root_mount_rel(&xsoftc.xpt_rootmount);
5170         }
5171         xpt_unlock_buses();
5172 }
5173
5174 /*
5175  * If the given device only has one peripheral attached to it, and if that
5176  * peripheral is the passthrough driver, announce it.  This insures that the
5177  * user sees some sort of announcement for every peripheral in their system.
5178  */
5179 static int
5180 xptpassannouncefunc(struct cam_ed *device, void *arg)
5181 {
5182         struct cam_periph *periph;
5183         int i;
5184
5185         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5186              periph = SLIST_NEXT(periph, periph_links), i++);
5187
5188         periph = SLIST_FIRST(&device->periphs);
5189         if ((i == 1)
5190          && (strncmp(periph->periph_name, "pass", 4) == 0))
5191                 xpt_announce_periph(periph, NULL);
5192
5193         return(1);
5194 }
5195
5196 static void
5197 xpt_finishconfig_task(void *context, int pending)
5198 {
5199
5200         periphdriver_init(2);
5201         /*
5202          * Check for devices with no "standard" peripheral driver
5203          * attached.  For any devices like that, announce the
5204          * passthrough driver so the user will see something.
5205          */
5206         if (!bootverbose)
5207                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5208
5209         xpt_release_boot();
5210 }
5211
5212 cam_status
5213 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5214                    struct cam_path *path)
5215 {
5216         struct ccb_setasync csa;
5217         cam_status status;
5218         int xptpath = 0;
5219
5220         if (path == NULL) {
5221                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5222                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5223                 if (status != CAM_REQ_CMP)
5224                         return (status);
5225                 xpt_path_lock(path);
5226                 xptpath = 1;
5227         }
5228
5229         memset(&csa, 0, sizeof(csa));
5230         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5231         csa.ccb_h.func_code = XPT_SASYNC_CB;
5232         csa.event_enable = event;
5233         csa.callback = cbfunc;
5234         csa.callback_arg = cbarg;
5235         xpt_action((union ccb *)&csa);
5236         status = csa.ccb_h.status;
5237
5238         CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5239             ("xpt_register_async: func %p\n", cbfunc));
5240
5241         if (xptpath) {
5242                 xpt_path_unlock(path);
5243                 xpt_free_path(path);
5244         }
5245
5246         if ((status == CAM_REQ_CMP) &&
5247             (csa.event_enable & AC_FOUND_DEVICE)) {
5248                 /*
5249                  * Get this peripheral up to date with all
5250                  * the currently existing devices.
5251                  */
5252                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5253         }
5254         if ((status == CAM_REQ_CMP) &&
5255             (csa.event_enable & AC_PATH_REGISTERED)) {
5256                 /*
5257                  * Get this peripheral up to date with all
5258                  * the currently existing buses.
5259                  */
5260                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5261         }
5262
5263         return (status);
5264 }
5265
5266 static void
5267 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5268 {
5269         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5270
5271         switch (work_ccb->ccb_h.func_code) {
5272         /* Common cases first */
5273         case XPT_PATH_INQ:              /* Path routing inquiry */
5274         {
5275                 struct ccb_pathinq *cpi;
5276
5277                 cpi = &work_ccb->cpi;
5278                 cpi->version_num = 1; /* XXX??? */
5279                 cpi->hba_inquiry = 0;
5280                 cpi->target_sprt = 0;
5281                 cpi->hba_misc = 0;
5282                 cpi->hba_eng_cnt = 0;
5283                 cpi->max_target = 0;
5284                 cpi->max_lun = 0;
5285                 cpi->initiator_id = 0;
5286                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5287                 strlcpy(cpi->hba_vid, "", HBA_IDLEN);
5288                 strlcpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5289                 cpi->unit_number = sim->unit_number;
5290                 cpi->bus_id = sim->bus_id;
5291                 cpi->base_transfer_speed = 0;
5292                 cpi->protocol = PROTO_UNSPECIFIED;
5293                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5294                 cpi->transport = XPORT_UNSPECIFIED;
5295                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5296                 cpi->ccb_h.status = CAM_REQ_CMP;
5297                 break;
5298         }
5299         default:
5300                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5301                 break;
5302         }
5303         xpt_done(work_ccb);
5304 }
5305
5306 /*
5307  * The xpt as a "controller" has no interrupt sources, so polling
5308  * is a no-op.
5309  */
5310 static void
5311 xptpoll(struct cam_sim *sim)
5312 {
5313 }
5314
5315 void
5316 xpt_lock_buses(void)
5317 {
5318         mtx_lock(&xsoftc.xpt_topo_lock);
5319 }
5320
5321 void
5322 xpt_unlock_buses(void)
5323 {
5324         mtx_unlock(&xsoftc.xpt_topo_lock);
5325 }
5326
5327 struct mtx *
5328 xpt_path_mtx(struct cam_path *path)
5329 {
5330
5331         return (&path->device->device_mtx);
5332 }
5333
5334 static void
5335 xpt_done_process(struct ccb_hdr *ccb_h)
5336 {
5337         struct cam_sim *sim = NULL;
5338         struct cam_devq *devq = NULL;
5339         struct mtx *mtx = NULL;
5340
5341 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5342         struct ccb_scsiio *csio;
5343
5344         if (ccb_h->func_code == XPT_SCSI_IO) {
5345                 csio = &((union ccb *)ccb_h)->csio;
5346                 if (csio->bio != NULL)
5347                         biotrack(csio->bio, __func__);
5348         }
5349 #endif
5350
5351         if (ccb_h->flags & CAM_HIGH_POWER) {
5352                 struct highpowerlist    *hphead;
5353                 struct cam_ed           *device;
5354
5355                 mtx_lock(&xsoftc.xpt_highpower_lock);
5356                 hphead = &xsoftc.highpowerq;
5357
5358                 device = STAILQ_FIRST(hphead);
5359
5360                 /*
5361                  * Increment the count since this command is done.
5362                  */
5363                 xsoftc.num_highpower++;
5364
5365                 /*
5366                  * Any high powered commands queued up?
5367                  */
5368                 if (device != NULL) {
5369                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5370                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5371
5372                         mtx_lock(&device->sim->devq->send_mtx);
5373                         xpt_release_devq_device(device,
5374                                          /*count*/1, /*runqueue*/TRUE);
5375                         mtx_unlock(&device->sim->devq->send_mtx);
5376                 } else
5377                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5378         }
5379
5380         /*
5381          * Insulate against a race where the periph is destroyed but CCBs are
5382          * still not all processed. This shouldn't happen, but allows us better
5383          * bug diagnostic when it does.
5384          */
5385         if (ccb_h->path->bus)
5386                 sim = ccb_h->path->bus->sim;
5387
5388         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5389                 KASSERT(sim, ("sim missing for CAM_RELEASE_SIMQ request"));
5390                 xpt_release_simq(sim, /*run_queue*/FALSE);
5391                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5392         }
5393
5394         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5395          && (ccb_h->status & CAM_DEV_QFRZN)) {
5396                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5397                 ccb_h->status &= ~CAM_DEV_QFRZN;
5398         }
5399
5400         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5401                 struct cam_ed *dev = ccb_h->path->device;
5402
5403                 if (sim)
5404                         devq = sim->devq;
5405                 KASSERT(devq, ("Periph disappeared with CCB %p %s request pending.",
5406                         ccb_h, xpt_action_name(ccb_h->func_code)));
5407
5408                 mtx_lock(&devq->send_mtx);
5409                 devq->send_active--;
5410                 devq->send_openings++;
5411                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5412
5413                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5414                   && (dev->ccbq.dev_active == 0))) {
5415                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5416                         xpt_release_devq_device(dev, /*count*/1,
5417                                          /*run_queue*/FALSE);
5418                 }
5419
5420                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5421                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5422                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5423                         xpt_release_devq_device(dev, /*count*/1,
5424                                          /*run_queue*/FALSE);
5425                 }
5426
5427                 if (!device_is_queued(dev))
5428                         (void)xpt_schedule_devq(devq, dev);
5429                 xpt_run_devq(devq);
5430                 mtx_unlock(&devq->send_mtx);
5431
5432                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5433                         mtx = xpt_path_mtx(ccb_h->path);
5434                         mtx_lock(mtx);
5435
5436                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5437                          && (--dev->tag_delay_count == 0))
5438                                 xpt_start_tags(ccb_h->path);
5439                 }
5440         }
5441
5442         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5443                 if (mtx == NULL) {
5444                         mtx = xpt_path_mtx(ccb_h->path);
5445                         mtx_lock(mtx);
5446                 }
5447         } else {
5448                 if (mtx != NULL) {
5449                         mtx_unlock(mtx);
5450                         mtx = NULL;
5451                 }
5452         }
5453
5454         /* Call the peripheral driver's callback */
5455         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5456         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5457         if (mtx != NULL)
5458                 mtx_unlock(mtx);
5459 }
5460
5461 /*
5462  * Parameterize instead and use xpt_done_td?
5463  */
5464 static void
5465 xpt_async_td(void *arg)
5466 {
5467         struct cam_doneq *queue = arg;
5468         struct ccb_hdr *ccb_h;
5469         STAILQ_HEAD(, ccb_hdr)  doneq;
5470
5471         STAILQ_INIT(&doneq);
5472         mtx_lock(&queue->cam_doneq_mtx);
5473         while (1) {
5474                 while (STAILQ_EMPTY(&queue->cam_doneq))
5475                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5476                             PRIBIO, "-", 0);
5477                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5478                 mtx_unlock(&queue->cam_doneq_mtx);
5479
5480                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5481                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5482                         xpt_done_process(ccb_h);
5483                 }
5484
5485                 mtx_lock(&queue->cam_doneq_mtx);
5486         }
5487 }
5488
5489 void
5490 xpt_done_td(void *arg)
5491 {
5492         struct cam_doneq *queue = arg;
5493         struct ccb_hdr *ccb_h;
5494         STAILQ_HEAD(, ccb_hdr)  doneq;
5495
5496         STAILQ_INIT(&doneq);
5497         mtx_lock(&queue->cam_doneq_mtx);
5498         while (1) {
5499                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5500                         queue->cam_doneq_sleep = 1;
5501                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5502                             PRIBIO, "-", 0);
5503                         queue->cam_doneq_sleep = 0;
5504                 }
5505                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5506                 mtx_unlock(&queue->cam_doneq_mtx);
5507
5508                 THREAD_NO_SLEEPING();
5509                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5510                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5511                         xpt_done_process(ccb_h);
5512                 }
5513                 THREAD_SLEEPING_OK();
5514
5515                 mtx_lock(&queue->cam_doneq_mtx);
5516         }
5517 }
5518
5519 static void
5520 camisr_runqueue(void)
5521 {
5522         struct  ccb_hdr *ccb_h;
5523         struct cam_doneq *queue;
5524         int i;
5525
5526         /* Process global queues. */
5527         for (i = 0; i < cam_num_doneqs; i++) {
5528                 queue = &cam_doneqs[i];
5529                 mtx_lock(&queue->cam_doneq_mtx);
5530                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5531                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5532                         mtx_unlock(&queue->cam_doneq_mtx);
5533                         xpt_done_process(ccb_h);
5534                         mtx_lock(&queue->cam_doneq_mtx);
5535                 }
5536                 mtx_unlock(&queue->cam_doneq_mtx);
5537         }
5538 }
5539
5540 /**
5541  * @brief Return the device_t associated with the path
5542  *
5543  * When a SIM is created, it registers a bus with a NEWBUS device_t. This is
5544  * stored in the internal cam_eb bus structure. There is no guarnatee any given
5545  * path will have a @c device_t associated with it (it's legal to call @c
5546  * xpt_bus_register with a @c NULL @c device_t.
5547  *
5548  * @param path          Path to return the device_t for.
5549  */
5550 device_t
5551 xpt_path_sim_device(const struct cam_path *path)
5552 {
5553         return (path->bus->parent_dev);
5554 }
5555
5556 struct kv
5557 {
5558         uint32_t v;
5559         const char *name;
5560 };
5561
5562 static struct kv map[] = {
5563         { XPT_NOOP, "XPT_NOOP" },
5564         { XPT_SCSI_IO, "XPT_SCSI_IO" },
5565         { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5566         { XPT_GDEVLIST, "XPT_GDEVLIST" },
5567         { XPT_PATH_INQ, "XPT_PATH_INQ" },
5568         { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5569         { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5570         { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5571         { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5572         { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5573         { XPT_DEBUG, "XPT_DEBUG" },
5574         { XPT_PATH_STATS, "XPT_PATH_STATS" },
5575         { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5576         { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5577         { XPT_ASYNC, "XPT_ASYNC" },
5578         { XPT_ABORT, "XPT_ABORT" },
5579         { XPT_RESET_BUS, "XPT_RESET_BUS" },
5580         { XPT_RESET_DEV, "XPT_RESET_DEV" },
5581         { XPT_TERM_IO, "XPT_TERM_IO" },
5582         { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5583         { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5584         { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5585         { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5586         { XPT_ATA_IO, "XPT_ATA_IO" },
5587         { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5588         { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5589         { XPT_NVME_IO, "XPT_NVME_IO" },
5590         { XPT_MMC_IO, "XPT_MMC_IO" },
5591         { XPT_SMP_IO, "XPT_SMP_IO" },
5592         { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5593         { XPT_NVME_ADMIN, "XPT_NVME_ADMIN" },
5594         { XPT_ENG_INQ, "XPT_ENG_INQ" },
5595         { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5596         { XPT_EN_LUN, "XPT_EN_LUN" },
5597         { XPT_TARGET_IO, "XPT_TARGET_IO" },
5598         { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5599         { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5600         { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5601         { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5602         { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5603         { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5604         { 0, 0 }
5605 };
5606
5607 const char *
5608 xpt_action_name(uint32_t action)
5609 {
5610         static char buffer[32]; /* Only for unknown messages -- racy */
5611         struct kv *walker = map;
5612
5613         while (walker->name != NULL) {
5614                 if (walker->v == action)
5615                         return (walker->name);
5616                 walker++;
5617         }
5618
5619         snprintf(buffer, sizeof(buffer), "%#x", action);
5620         return (buffer);
5621 }