sys/cam/cam_xpt.c

   1 /*-
   2  * Implementation of the Common Access Method Transport (XPT) layer.
   3  *
   4  * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
   5  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions, and the following disclaimer,
  13  *    without modification, immediately at the beginning of the file.
  14  * 2. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  21  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/param.h>
  34 #include <sys/bio.h>
  35 #include <sys/bus.h>
  36 #include <sys/systm.h>
  37 #include <sys/types.h>
  38 #include <sys/malloc.h>
  39 #include <sys/kernel.h>
  40 #include <sys/time.h>
  41 #include <sys/conf.h>
  42 #include <sys/fcntl.h>
  43 #include <sys/interrupt.h>
  44 #include <sys/proc.h>
  45 #include <sys/sbuf.h>
  46 #include <sys/smp.h>
  47 #include <sys/taskqueue.h>
  48
  49 #include <sys/lock.h>
  50 #include <sys/mutex.h>
  51 #include <sys/sysctl.h>
  52 #include <sys/kthread.h>
  53
  54 #include <cam/cam.h>
  55 #include <cam/cam_ccb.h>
  56 #include <cam/cam_periph.h>
  57 #include <cam/cam_queue.h>
  58 #include <cam/cam_sim.h>
  59 #include <cam/cam_xpt.h>
  60 #include <cam/cam_xpt_sim.h>
  61 #include <cam/cam_xpt_periph.h>
  62 #include <cam/cam_xpt_internal.h>
  63 #include <cam/cam_debug.h>
  64 #include <cam/cam_compat.h>
  65
  66 #include <cam/scsi/scsi_all.h>
  67 #include <cam/scsi/scsi_message.h>
  68 #include <cam/scsi/scsi_pass.h>
  69
  70 #include <machine/md_var.h>     /* geometry translation */
  71 #include <machine/stdarg.h>     /* for xpt_print below */
  72
  73 #include "opt_cam.h"
  74
  75 /*
  76  * This is the maximum number of high powered commands (e.g. start unit)
  77  * that can be outstanding at a particular time.
  78  */
  79 #ifndef CAM_MAX_HIGHPOWER
  80 #define CAM_MAX_HIGHPOWER  4
  81 #endif
  82
  83 /* Datastructures internal to the xpt layer */
  84 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers");
  85 MALLOC_DEFINE(M_CAMDEV, "CAM DEV", "CAM devices");
  86 MALLOC_DEFINE(M_CAMCCB, "CAM CCB", "CAM CCBs");
  87 MALLOC_DEFINE(M_CAMPATH, "CAM path", "CAM paths");
  88
  89 /* Object for defering XPT actions to a taskqueue */
  90 struct xpt_task {
  91         struct task     task;
  92         void            *data1;
  93         uintptr_t       data2;
  94 };
  95
  96 struct xpt_softc {
  97         uint32_t                xpt_generation;
  98
  99         /* number of high powered commands that can go through right now */
 100         struct mtx              xpt_highpower_lock;
 101         STAILQ_HEAD(highpowerlist, cam_ed)      highpowerq;
 102         int                     num_highpower;
 103
 104         /* queue for handling async rescan requests. */
 105         TAILQ_HEAD(, ccb_hdr) ccb_scanq;
 106         int buses_to_config;
 107         int buses_config_done;
 108
 109         /* Registered busses */
 110         TAILQ_HEAD(,cam_eb)     xpt_busses;
 111         u_int                   bus_generation;
 112
 113         struct intr_config_hook *xpt_config_hook;
 114
 115         int                     boot_delay;
 116         struct callout          boot_callout;
 117
 118         struct mtx              xpt_topo_lock;
 119         struct mtx              xpt_lock;
 120         struct taskqueue        *xpt_taskq;
 121 };
 122
 123 typedef enum {
 124         DM_RET_COPY             = 0x01,
 125         DM_RET_FLAG_MASK        = 0x0f,
 126         DM_RET_NONE             = 0x00,
 127         DM_RET_STOP             = 0x10,
 128         DM_RET_DESCEND          = 0x20,
 129         DM_RET_ERROR            = 0x30,
 130         DM_RET_ACTION_MASK      = 0xf0
 131 } dev_match_ret;
 132
 133 typedef enum {
 134         XPT_DEPTH_BUS,
 135         XPT_DEPTH_TARGET,
 136         XPT_DEPTH_DEVICE,
 137         XPT_DEPTH_PERIPH
 138 } xpt_traverse_depth;
 139
 140 struct xpt_traverse_config {
 141         xpt_traverse_depth      depth;
 142         void                    *tr_func;
 143         void                    *tr_arg;
 144 };
 145
 146 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 147 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 148 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 149 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 150 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 151
 152 /* Transport layer configuration information */
 153 static struct xpt_softc xsoftc;
 154
 155 MTX_SYSINIT(xpt_topo_init, &xsoftc.xpt_topo_lock, "XPT topology lock", MTX_DEF);
 156
 157 SYSCTL_INT(_kern_cam, OID_AUTO, boot_delay, CTLFLAG_RDTUN,
 158            &xsoftc.boot_delay, 0, "Bus registration wait time");
 159 SYSCTL_UINT(_kern_cam, OID_AUTO, xpt_generation, CTLFLAG_RD,
 160             &xsoftc.xpt_generation, 0, "CAM peripheral generation count");
 161
 162 struct cam_doneq {
 163         struct mtx_padalign     cam_doneq_mtx;
 164         STAILQ_HEAD(, ccb_hdr)  cam_doneq;
 165         int                     cam_doneq_sleep;
 166 };
 167
 168 static struct cam_doneq cam_doneqs[MAXCPU];
 169 static int cam_num_doneqs;
 170 static struct proc *cam_proc;
 171
 172 SYSCTL_INT(_kern_cam, OID_AUTO, num_doneqs, CTLFLAG_RDTUN,
 173            &cam_num_doneqs, 0, "Number of completion queues/threads");
 174
 175 struct cam_periph *xpt_periph;
 176
 177 static periph_init_t xpt_periph_init;
 178
 179 static struct periph_driver xpt_driver =
 180 {
 181         xpt_periph_init, "xpt",
 182         TAILQ_HEAD_INITIALIZER(xpt_driver.units), /* generation */ 0,
 183         CAM_PERIPH_DRV_EARLY
 184 };
 185
 186 PERIPHDRIVER_DECLARE(xpt, xpt_driver);
 187
 188 static d_open_t xptopen;
 189 static d_close_t xptclose;
 190 static d_ioctl_t xptioctl;
 191 static d_ioctl_t xptdoioctl;
 192
 193 static struct cdevsw xpt_cdevsw = {
 194         .d_version =    D_VERSION,
 195         .d_flags =      0,
 196         .d_open =       xptopen,
 197         .d_close =      xptclose,
 198         .d_ioctl =      xptioctl,
 199         .d_name =       "xpt",
 200 };
 201
 202 /* Storage for debugging datastructures */
 203 struct cam_path *cam_dpath;
 204 u_int32_t cam_dflags = CAM_DEBUG_FLAGS;
 205 SYSCTL_UINT(_kern_cam, OID_AUTO, dflags, CTLFLAG_RWTUN,
 206         &cam_dflags, 0, "Enabled debug flags");
 207 u_int32_t cam_debug_delay = CAM_DEBUG_DELAY;
 208 SYSCTL_UINT(_kern_cam, OID_AUTO, debug_delay, CTLFLAG_RWTUN,
 209         &cam_debug_delay, 0, "Delay in us after each debug message");
 210
 211 /* Our boot-time initialization hook */
 212 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *);
 213
 214 static moduledata_t cam_moduledata = {
 215         "cam",
 216         cam_module_event_handler,
 217         NULL
 218 };
 219
 220 static int      xpt_init(void *);
 221
 222 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND);
 223 MODULE_VERSION(cam, 1);
 224
 225
 226 static void             xpt_async_bcast(struct async_list *async_head,
 227                                         u_int32_t async_code,
 228                                         struct cam_path *path,
 229                                         void *async_arg);
 230 static path_id_t xptnextfreepathid(void);
 231 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 232 static union ccb *xpt_get_ccb(struct cam_periph *periph);
 233 static union ccb *xpt_get_ccb_nowait(struct cam_periph *periph);
 234 static void      xpt_run_allocq(struct cam_periph *periph, int sleep);
 235 static void      xpt_run_allocq_task(void *context, int pending);
 236 static void      xpt_run_devq(struct cam_devq *devq);
 237 static timeout_t xpt_release_devq_timeout;
 238 static void      xpt_release_simq_timeout(void *arg) __unused;
 239 static void      xpt_acquire_bus(struct cam_eb *bus);
 240 static void      xpt_release_bus(struct cam_eb *bus);
 241 static uint32_t  xpt_freeze_devq_device(struct cam_ed *dev, u_int count);
 242 static int       xpt_release_devq_device(struct cam_ed *dev, u_int count,
 243                     int run_queue);
 244 static struct cam_et*
 245                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 246 static void      xpt_acquire_target(struct cam_et *target);
 247 static void      xpt_release_target(struct cam_et *target);
 248 static struct cam_eb*
 249                  xpt_find_bus(path_id_t path_id);
 250 static struct cam_et*
 251                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 252 static struct cam_ed*
 253                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 254 static void      xpt_config(void *arg);
 255 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 256                                  u_int32_t new_priority);
 257 static xpt_devicefunc_t xptpassannouncefunc;
 258 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 259 static void      xptpoll(struct cam_sim *sim);
 260 static void      camisr_runqueue(void);
 261 static void      xpt_done_process(struct ccb_hdr *ccb_h);
 262 static void      xpt_done_td(void *);
 263 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 264                                     u_int num_patterns, struct cam_eb *bus);
 265 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 266                                        u_int num_patterns,
 267                                        struct cam_ed *device);
 268 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 269                                        u_int num_patterns,
 270                                        struct cam_periph *periph);
 271 static xpt_busfunc_t    xptedtbusfunc;
 272 static xpt_targetfunc_t xptedttargetfunc;
 273 static xpt_devicefunc_t xptedtdevicefunc;
 274 static xpt_periphfunc_t xptedtperiphfunc;
 275 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 276 static xpt_periphfunc_t xptplistperiphfunc;
 277 static int              xptedtmatch(struct ccb_dev_match *cdm);
 278 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 279 static int              xptbustraverse(struct cam_eb *start_bus,
 280                                        xpt_busfunc_t *tr_func, void *arg);
 281 static int              xpttargettraverse(struct cam_eb *bus,
 282                                           struct cam_et *start_target,
 283                                           xpt_targetfunc_t *tr_func, void *arg);
 284 static int              xptdevicetraverse(struct cam_et *target,
 285                                           struct cam_ed *start_device,
 286                                           xpt_devicefunc_t *tr_func, void *arg);
 287 static int              xptperiphtraverse(struct cam_ed *device,
 288                                           struct cam_periph *start_periph,
 289                                           xpt_periphfunc_t *tr_func, void *arg);
 290 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 291                                         xpt_pdrvfunc_t *tr_func, void *arg);
 292 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 293                                             struct cam_periph *start_periph,
 294                                             xpt_periphfunc_t *tr_func,
 295                                             void *arg);
 296 static xpt_busfunc_t    xptdefbusfunc;
 297 static xpt_targetfunc_t xptdeftargetfunc;
 298 static xpt_devicefunc_t xptdefdevicefunc;
 299 static xpt_periphfunc_t xptdefperiphfunc;
 300 static void             xpt_finishconfig_task(void *context, int pending);
 301 static void             xpt_dev_async_default(u_int32_t async_code,
 302                                               struct cam_eb *bus,
 303                                               struct cam_et *target,
 304                                               struct cam_ed *device,
 305                                               void *async_arg);
 306 static struct cam_ed *  xpt_alloc_device_default(struct cam_eb *bus,
 307                                                  struct cam_et *target,
 308                                                  lun_id_t lun_id);
 309 static xpt_devicefunc_t xptsetasyncfunc;
 310 static xpt_busfunc_t    xptsetasyncbusfunc;
 311 static cam_status       xptregister(struct cam_periph *periph,
 312                                     void *arg);
 313 static const char *     xpt_action_name(uint32_t action);
 314 static __inline int device_is_queued(struct cam_ed *device);
 315
 316 static __inline int
 317 xpt_schedule_devq(struct cam_devq *devq, struct cam_ed *dev)
 318 {
 319         int     retval;
 320
 321         mtx_assert(&devq->send_mtx, MA_OWNED);
 322         if ((dev->ccbq.queue.entries > 0) &&
 323             (dev->ccbq.dev_openings > 0) &&
 324             (dev->ccbq.queue.qfrozen_cnt == 0)) {
 325                 /*
 326                  * The priority of a device waiting for controller
 327                  * resources is that of the highest priority CCB
 328                  * enqueued.
 329                  */
 330                 retval =
 331                     xpt_schedule_dev(&devq->send_queue,
 332                                      &dev->devq_entry,
 333                                      CAMQ_GET_PRIO(&dev->ccbq.queue));
 334         } else {
 335                 retval = 0;
 336         }
 337         return (retval);
 338 }
 339
 340 static __inline int
 341 device_is_queued(struct cam_ed *device)
 342 {
 343         return (device->devq_entry.index != CAM_UNQUEUED_INDEX);
 344 }
 345
 346 static void
 347 xpt_periph_init()
 348 {
 349         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 350 }
 351
 352 static int
 353 xptopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 354 {
 355
 356         /*
 357          * Only allow read-write access.
 358          */
 359         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 360                 return(EPERM);
 361
 362         /*
 363          * We don't allow nonblocking access.
 364          */
 365         if ((flags & O_NONBLOCK) != 0) {
 366                 printf("%s: can't do nonblocking access\n", devtoname(dev));
 367                 return(ENODEV);
 368         }
 369
 370         return(0);
 371 }
 372
 373 static int
 374 xptclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 375 {
 376
 377         return(0);
 378 }
 379
 380 /*
 381  * Don't automatically grab the xpt softc lock here even though this is going
 382  * through the xpt device.  The xpt device is really just a back door for
 383  * accessing other devices and SIMs, so the right thing to do is to grab
 384  * the appropriate SIM lock once the bus/SIM is located.
 385  */
 386 static int
 387 xptioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 388 {
 389         int error;
 390
 391         if ((error = xptdoioctl(dev, cmd, addr, flag, td)) == ENOTTY) {
 392                 error = cam_compat_ioctl(dev, cmd, addr, flag, td, xptdoioctl);
 393         }
 394         return (error);
 395 }
 396
 397 static int
 398 xptdoioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 399 {
 400         int error;
 401
 402         error = 0;
 403
 404         switch(cmd) {
 405         /*
 406          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 407          * to accept CCB types that don't quite make sense to send through a
 408          * passthrough driver. XPT_PATH_INQ is an exception to this, as stated
 409          * in the CAM spec.
 410          */
 411         case CAMIOCOMMAND: {
 412                 union ccb *ccb;
 413                 union ccb *inccb;
 414                 struct cam_eb *bus;
 415
 416                 inccb = (union ccb *)addr;
 417 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 418                 if (inccb->ccb_h.func_code == XPT_SCSI_IO)
 419                         inccb->csio.bio = NULL;
 420 #endif
 421
 422                 bus = xpt_find_bus(inccb->ccb_h.path_id);
 423                 if (bus == NULL)
 424                         return (EINVAL);
 425
 426                 switch (inccb->ccb_h.func_code) {
 427                 case XPT_SCAN_BUS:
 428                 case XPT_RESET_BUS:
 429                         if (inccb->ccb_h.target_id != CAM_TARGET_WILDCARD ||
 430                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 431                                 xpt_release_bus(bus);
 432                                 return (EINVAL);
 433                         }
 434                         break;
 435                 case XPT_SCAN_TGT:
 436                         if (inccb->ccb_h.target_id == CAM_TARGET_WILDCARD ||
 437                             inccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
 438                                 xpt_release_bus(bus);
 439                                 return (EINVAL);
 440                         }
 441                         break;
 442                 default:
 443                         break;
 444                 }
 445
 446                 switch(inccb->ccb_h.func_code) {
 447                 case XPT_SCAN_BUS:
 448                 case XPT_RESET_BUS:
 449                 case XPT_PATH_INQ:
 450                 case XPT_ENG_INQ:
 451                 case XPT_SCAN_LUN:
 452                 case XPT_SCAN_TGT:
 453
 454                         ccb = xpt_alloc_ccb();
 455
 456                         /*
 457                          * Create a path using the bus, target, and lun the
 458                          * user passed in.
 459                          */
 460                         if (xpt_create_path(&ccb->ccb_h.path, NULL,
 461                                             inccb->ccb_h.path_id,
 462                                             inccb->ccb_h.target_id,
 463                                             inccb->ccb_h.target_lun) !=
 464                                             CAM_REQ_CMP){
 465                                 error = EINVAL;
 466                                 xpt_free_ccb(ccb);
 467                                 break;
 468                         }
 469                         /* Ensure all of our fields are correct */
 470                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
 471                                       inccb->ccb_h.pinfo.priority);
 472                         xpt_merge_ccb(ccb, inccb);
 473                         xpt_path_lock(ccb->ccb_h.path);
 474                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
 475                         xpt_path_unlock(ccb->ccb_h.path);
 476                         bcopy(ccb, inccb, sizeof(union ccb));
 477                         xpt_free_path(ccb->ccb_h.path);
 478                         xpt_free_ccb(ccb);
 479                         break;
 480
 481                 case XPT_DEBUG: {
 482                         union ccb ccb;
 483
 484                         /*
 485                          * This is an immediate CCB, so it's okay to
 486                          * allocate it on the stack.
 487                          */
 488
 489                         /*
 490                          * Create a path using the bus, target, and lun the
 491                          * user passed in.
 492                          */
 493                         if (xpt_create_path(&ccb.ccb_h.path, NULL,
 494                                             inccb->ccb_h.path_id,
 495                                             inccb->ccb_h.target_id,
 496                                             inccb->ccb_h.target_lun) !=
 497                                             CAM_REQ_CMP){
 498                                 error = EINVAL;
 499                                 break;
 500                         }
 501                         /* Ensure all of our fields are correct */
 502                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
 503                                       inccb->ccb_h.pinfo.priority);
 504                         xpt_merge_ccb(&ccb, inccb);
 505                         xpt_action(&ccb);
 506                         bcopy(&ccb, inccb, sizeof(union ccb));
 507                         xpt_free_path(ccb.ccb_h.path);
 508                         break;
 509
 510                 }
 511                 case XPT_DEV_MATCH: {
 512                         struct cam_periph_map_info mapinfo;
 513                         struct cam_path *old_path;
 514
 515                         /*
 516                          * We can't deal with physical addresses for this
 517                          * type of transaction.
 518                          */
 519                         if ((inccb->ccb_h.flags & CAM_DATA_MASK) !=
 520                             CAM_DATA_VADDR) {
 521                                 error = EINVAL;
 522                                 break;
 523                         }
 524
 525                         /*
 526                          * Save this in case the caller had it set to
 527                          * something in particular.
 528                          */
 529                         old_path = inccb->ccb_h.path;
 530
 531                         /*
 532                          * We really don't need a path for the matching
 533                          * code.  The path is needed because of the
 534                          * debugging statements in xpt_action().  They
 535                          * assume that the CCB has a valid path.
 536                          */
 537                         inccb->ccb_h.path = xpt_periph->path;
 538
 539                         bzero(&mapinfo, sizeof(mapinfo));
 540
 541                         /*
 542                          * Map the pattern and match buffers into kernel
 543                          * virtual address space.
 544                          */
 545                         error = cam_periph_mapmem(inccb, &mapinfo, MAXPHYS);
 546
 547                         if (error) {
 548                                 inccb->ccb_h.path = old_path;
 549                                 break;
 550                         }
 551
 552                         /*
 553                          * This is an immediate CCB, we can send it on directly.
 554                          */
 555                         xpt_action(inccb);
 556
 557                         /*
 558                          * Map the buffers back into user space.
 559                          */
 560                         cam_periph_unmapmem(inccb, &mapinfo);
 561
 562                         inccb->ccb_h.path = old_path;
 563
 564                         error = 0;
 565                         break;
 566                 }
 567                 default:
 568                         error = ENOTSUP;
 569                         break;
 570                 }
 571                 xpt_release_bus(bus);
 572                 break;
 573         }
 574         /*
 575          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
 576          * with the periphal driver name and unit name filled in.  The other
 577          * fields don't really matter as input.  The passthrough driver name
 578          * ("pass"), and unit number are passed back in the ccb.  The current
 579          * device generation number, and the index into the device peripheral
 580          * driver list, and the status are also passed back.  Note that
 581          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
 582          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
 583          * (or rather should be) impossible for the device peripheral driver
 584          * list to change since we look at the whole thing in one pass, and
 585          * we do it with lock protection.
 586          *
 587          */
 588         case CAMGETPASSTHRU: {
 589                 union ccb *ccb;
 590                 struct cam_periph *periph;
 591                 struct periph_driver **p_drv;
 592                 char   *name;
 593                 u_int unit;
 594                 int base_periph_found;
 595
 596                 ccb = (union ccb *)addr;
 597                 unit = ccb->cgdl.unit_number;
 598                 name = ccb->cgdl.periph_name;
 599                 base_periph_found = 0;
 600 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
 601                 if (ccb->ccb_h.func_code == XPT_SCSI_IO)
 602                         ccb->csio.bio = NULL;
 603 #endif
 604
 605                 /*
 606                  * Sanity check -- make sure we don't get a null peripheral
 607                  * driver name.
 608                  */
 609                 if (*ccb->cgdl.periph_name == '\0') {
 610                         error = EINVAL;
 611                         break;
 612                 }
 613
 614                 /* Keep the list from changing while we traverse it */
 615                 xpt_lock_buses();
 616
 617                 /* first find our driver in the list of drivers */
 618                 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++)
 619                         if (strcmp((*p_drv)->driver_name, name) == 0)
 620                                 break;
 621
 622                 if (*p_drv == NULL) {
 623                         xpt_unlock_buses();
 624                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 625                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 626                         *ccb->cgdl.periph_name = '\0';
 627                         ccb->cgdl.unit_number = 0;
 628                         error = ENOENT;
 629                         break;
 630                 }
 631
 632                 /*
 633                  * Run through every peripheral instance of this driver
 634                  * and check to see whether it matches the unit passed
 635                  * in by the user.  If it does, get out of the loops and
 636                  * find the passthrough driver associated with that
 637                  * peripheral driver.
 638                  */
 639                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
 640                      periph = TAILQ_NEXT(periph, unit_links)) {
 641
 642                         if (periph->unit_number == unit)
 643                                 break;
 644                 }
 645                 /*
 646                  * If we found the peripheral driver that the user passed
 647                  * in, go through all of the peripheral drivers for that
 648                  * particular device and look for a passthrough driver.
 649                  */
 650                 if (periph != NULL) {
 651                         struct cam_ed *device;
 652                         int i;
 653
 654                         base_periph_found = 1;
 655                         device = periph->path->device;
 656                         for (i = 0, periph = SLIST_FIRST(&device->periphs);
 657                              periph != NULL;
 658                              periph = SLIST_NEXT(periph, periph_links), i++) {
 659                                 /*
 660                                  * Check to see whether we have a
 661                                  * passthrough device or not.
 662                                  */
 663                                 if (strcmp(periph->periph_name, "pass") == 0) {
 664                                         /*
 665                                          * Fill in the getdevlist fields.
 666                                          */
 667                                         strcpy(ccb->cgdl.periph_name,
 668                                                periph->periph_name);
 669                                         ccb->cgdl.unit_number =
 670                                                 periph->unit_number;
 671                                         if (SLIST_NEXT(periph, periph_links))
 672                                                 ccb->cgdl.status =
 673                                                         CAM_GDEVLIST_MORE_DEVS;
 674                                         else
 675                                                 ccb->cgdl.status =
 676                                                        CAM_GDEVLIST_LAST_DEVICE;
 677                                         ccb->cgdl.generation =
 678                                                 device->generation;
 679                                         ccb->cgdl.index = i;
 680                                         /*
 681                                          * Fill in some CCB header fields
 682                                          * that the user may want.
 683                                          */
 684                                         ccb->ccb_h.path_id =
 685                                                 periph->path->bus->path_id;
 686                                         ccb->ccb_h.target_id =
 687                                                 periph->path->target->target_id;
 688                                         ccb->ccb_h.target_lun =
 689                                                 periph->path->device->lun_id;
 690                                         ccb->ccb_h.status = CAM_REQ_CMP;
 691                                         break;
 692                                 }
 693                         }
 694                 }
 695
 696                 /*
 697                  * If the periph is null here, one of two things has
 698                  * happened.  The first possibility is that we couldn't
 699                  * find the unit number of the particular peripheral driver
 700                  * that the user is asking about.  e.g. the user asks for
 701                  * the passthrough driver for "da11".  We find the list of
 702                  * "da" peripherals all right, but there is no unit 11.
 703                  * The other possibility is that we went through the list
 704                  * of peripheral drivers attached to the device structure,
 705                  * but didn't find one with the name "pass".  Either way,
 706                  * we return ENOENT, since we couldn't find something.
 707                  */
 708                 if (periph == NULL) {
 709                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 710                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
 711                         *ccb->cgdl.periph_name = '\0';
 712                         ccb->cgdl.unit_number = 0;
 713                         error = ENOENT;
 714                         /*
 715                          * It is unfortunate that this is even necessary,
 716                          * but there are many, many clueless users out there.
 717                          * If this is true, the user is looking for the
 718                          * passthrough driver, but doesn't have one in his
 719                          * kernel.
 720                          */
 721                         if (base_periph_found == 1) {
 722                                 printf("xptioctl: pass driver is not in the "
 723                                        "kernel\n");
 724                                 printf("xptioctl: put \"device pass\" in "
 725                                        "your kernel config file\n");
 726                         }
 727                 }
 728                 xpt_unlock_buses();
 729                 break;
 730                 }
 731         default:
 732                 error = ENOTTY;
 733                 break;
 734         }
 735
 736         return(error);
 737 }
 738
 739 static int
 740 cam_module_event_handler(module_t mod, int what, void *arg)
 741 {
 742         int error;
 743
 744         switch (what) {
 745         case MOD_LOAD:
 746                 if ((error = xpt_init(NULL)) != 0)
 747                         return (error);
 748                 break;
 749         case MOD_UNLOAD:
 750                 return EBUSY;
 751         default:
 752                 return EOPNOTSUPP;
 753         }
 754
 755         return 0;
 756 }
 757
 758 static struct xpt_proto *
 759 xpt_proto_find(cam_proto proto)
 760 {
 761         struct xpt_proto **pp;
 762
 763         SET_FOREACH(pp, cam_xpt_proto_set) {
 764                 if ((*pp)->proto == proto)
 765                         return *pp;
 766         }
 767
 768         return NULL;
 769 }
 770
 771 static void
 772 xpt_rescan_done(struct cam_periph *periph, union ccb *done_ccb)
 773 {
 774
 775         if (done_ccb->ccb_h.ppriv_ptr1 == NULL) {
 776                 xpt_free_path(done_ccb->ccb_h.path);
 777                 xpt_free_ccb(done_ccb);
 778         } else {
 779                 done_ccb->ccb_h.cbfcnp = done_ccb->ccb_h.ppriv_ptr1;
 780                 (*done_ccb->ccb_h.cbfcnp)(periph, done_ccb);
 781         }
 782         xpt_release_boot();
 783 }
 784
 785 /* thread to handle bus rescans */
 786 static void
 787 xpt_scanner_thread(void *dummy)
 788 {
 789         union ccb       *ccb;
 790         struct cam_path  path;
 791
 792         xpt_lock_buses();
 793         for (;;) {
 794                 if (TAILQ_EMPTY(&xsoftc.ccb_scanq))
 795                         msleep(&xsoftc.ccb_scanq, &xsoftc.xpt_topo_lock, PRIBIO,
 796                                "-", 0);
 797                 if ((ccb = (union ccb *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) {
 798                         TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 799                         xpt_unlock_buses();
 800
 801                         /*
 802                          * Since lock can be dropped inside and path freed
 803                          * by completion callback even before return here,
 804                          * take our own path copy for reference.
 805                          */
 806                         xpt_copy_path(&path, ccb->ccb_h.path);
 807                         xpt_path_lock(&path);
 808                         xpt_action(ccb);
 809                         xpt_path_unlock(&path);
 810                         xpt_release_path(&path);
 811
 812                         xpt_lock_buses();
 813                 }
 814         }
 815 }
 816
 817 void
 818 xpt_rescan(union ccb *ccb)
 819 {
 820         struct ccb_hdr *hdr;
 821
 822         /* Prepare request */
 823         if (ccb->ccb_h.path->target->target_id == CAM_TARGET_WILDCARD &&
 824             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 825                 ccb->ccb_h.func_code = XPT_SCAN_BUS;
 826         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 827             ccb->ccb_h.path->device->lun_id == CAM_LUN_WILDCARD)
 828                 ccb->ccb_h.func_code = XPT_SCAN_TGT;
 829         else if (ccb->ccb_h.path->target->target_id != CAM_TARGET_WILDCARD &&
 830             ccb->ccb_h.path->device->lun_id != CAM_LUN_WILDCARD)
 831                 ccb->ccb_h.func_code = XPT_SCAN_LUN;
 832         else {
 833                 xpt_print(ccb->ccb_h.path, "illegal scan path\n");
 834                 xpt_free_path(ccb->ccb_h.path);
 835                 xpt_free_ccb(ccb);
 836                 return;
 837         }
 838         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
 839             ("xpt_rescan: func %#x %s\n", ccb->ccb_h.func_code,
 840                 xpt_action_name(ccb->ccb_h.func_code)));
 841
 842         ccb->ccb_h.ppriv_ptr1 = ccb->ccb_h.cbfcnp;
 843         ccb->ccb_h.cbfcnp = xpt_rescan_done;
 844         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, CAM_PRIORITY_XPT);
 845         /* Don't make duplicate entries for the same paths. */
 846         xpt_lock_buses();
 847         if (ccb->ccb_h.ppriv_ptr1 == NULL) {
 848                 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) {
 849                         if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) {
 850                                 wakeup(&xsoftc.ccb_scanq);
 851                                 xpt_unlock_buses();
 852                                 xpt_print(ccb->ccb_h.path, "rescan already queued\n");
 853                                 xpt_free_path(ccb->ccb_h.path);
 854                                 xpt_free_ccb(ccb);
 855                                 return;
 856                         }
 857                 }
 858         }
 859         TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe);
 860         xsoftc.buses_to_config++;
 861         wakeup(&xsoftc.ccb_scanq);
 862         xpt_unlock_buses();
 863 }
 864
 865 /* Functions accessed by the peripheral drivers */
 866 static int
 867 xpt_init(void *dummy)
 868 {
 869         struct cam_sim *xpt_sim;
 870         struct cam_path *path;
 871         struct cam_devq *devq;
 872         cam_status status;
 873         int error, i;
 874
 875         TAILQ_INIT(&xsoftc.xpt_busses);
 876         TAILQ_INIT(&xsoftc.ccb_scanq);
 877         STAILQ_INIT(&xsoftc.highpowerq);
 878         xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
 879
 880         mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
 881         mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
 882         xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
 883             taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
 884
 885 #ifdef CAM_BOOT_DELAY
 886         /*
 887          * Override this value at compile time to assist our users
 888          * who don't use loader to boot a kernel.
 889          */
 890         xsoftc.boot_delay = CAM_BOOT_DELAY;
 891 #endif
 892         /*
 893          * The xpt layer is, itself, the equivalent of a SIM.
 894          * Allow 16 ccbs in the ccb pool for it.  This should
 895          * give decent parallelism when we probe busses and
 896          * perform other XPT functions.
 897          */
 898         devq = cam_simq_alloc(16);
 899         xpt_sim = cam_sim_alloc(xptaction,
 900                                 xptpoll,
 901                                 "xpt",
 902                                 /*softc*/NULL,
 903                                 /*unit*/0,
 904                                 /*mtx*/&xsoftc.xpt_lock,
 905                                 /*max_dev_transactions*/0,
 906                                 /*max_tagged_dev_transactions*/0,
 907                                 devq);
 908         if (xpt_sim == NULL)
 909                 return (ENOMEM);
 910
 911         mtx_lock(&xsoftc.xpt_lock);
 912         if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
 913                 mtx_unlock(&xsoftc.xpt_lock);
 914                 printf("xpt_init: xpt_bus_register failed with status %#x,"
 915                        " failing attach\n", status);
 916                 return (EINVAL);
 917         }
 918         mtx_unlock(&xsoftc.xpt_lock);
 919
 920         /*
 921          * Looking at the XPT from the SIM layer, the XPT is
 922          * the equivalent of a peripheral driver.  Allocate
 923          * a peripheral driver entry for us.
 924          */
 925         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
 926                                       CAM_TARGET_WILDCARD,
 927                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
 928                 printf("xpt_init: xpt_create_path failed with status %#x,"
 929                        " failing attach\n", status);
 930                 return (EINVAL);
 931         }
 932         xpt_path_lock(path);
 933         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
 934                          path, NULL, 0, xpt_sim);
 935         xpt_path_unlock(path);
 936         xpt_free_path(path);
 937
 938         if (cam_num_doneqs < 1)
 939                 cam_num_doneqs = 1 + mp_ncpus / 6;
 940         else if (cam_num_doneqs > MAXCPU)
 941                 cam_num_doneqs = MAXCPU;
 942         for (i = 0; i < cam_num_doneqs; i++) {
 943                 mtx_init(&cam_doneqs[i].cam_doneq_mtx, "CAM doneq", NULL,
 944                     MTX_DEF);
 945                 STAILQ_INIT(&cam_doneqs[i].cam_doneq);
 946                 error = kproc_kthread_add(xpt_done_td, &cam_doneqs[i],
 947                     &cam_proc, NULL, 0, 0, "cam", "doneq%d", i);
 948                 if (error != 0) {
 949                         cam_num_doneqs = i;
 950                         break;
 951                 }
 952         }
 953         if (cam_num_doneqs < 1) {
 954                 printf("xpt_init: Cannot init completion queues "
 955                        "- failing attach\n");
 956                 return (ENOMEM);
 957         }
 958         /*
 959          * Register a callback for when interrupts are enabled.
 960          */
 961         xsoftc.xpt_config_hook =
 962             (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
 963                                               M_CAMXPT, M_NOWAIT | M_ZERO);
 964         if (xsoftc.xpt_config_hook == NULL) {
 965                 printf("xpt_init: Cannot malloc config hook "
 966                        "- failing attach\n");
 967                 return (ENOMEM);
 968         }
 969         xsoftc.xpt_config_hook->ich_func = xpt_config;
 970         if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) {
 971                 free (xsoftc.xpt_config_hook, M_CAMXPT);
 972                 printf("xpt_init: config_intrhook_establish failed "
 973                        "- failing attach\n");
 974         }
 975
 976         return (0);
 977 }
 978
 979 static cam_status
 980 xptregister(struct cam_periph *periph, void *arg)
 981 {
 982         struct cam_sim *xpt_sim;
 983
 984         if (periph == NULL) {
 985                 printf("xptregister: periph was NULL!!\n");
 986                 return(CAM_REQ_CMP_ERR);
 987         }
 988
 989         xpt_sim = (struct cam_sim *)arg;
 990         xpt_sim->softc = periph;
 991         xpt_periph = periph;
 992         periph->softc = NULL;
 993
 994         return(CAM_REQ_CMP);
 995 }
 996
 997 int32_t
 998 xpt_add_periph(struct cam_periph *periph)
 999 {
1000         struct cam_ed *device;
1001         int32_t  status;
1002
1003         TASK_INIT(&periph->periph_run_task, 0, xpt_run_allocq_task, periph);
1004         device = periph->path->device;
1005         status = CAM_REQ_CMP;
1006         if (device != NULL) {
1007                 mtx_lock(&device->target->bus->eb_mtx);
1008                 device->generation++;
1009                 SLIST_INSERT_HEAD(&device->periphs, periph, periph_links);
1010                 mtx_unlock(&device->target->bus->eb_mtx);
1011                 atomic_add_32(&xsoftc.xpt_generation, 1);
1012         }
1013
1014         return (status);
1015 }
1016
1017 void
1018 xpt_remove_periph(struct cam_periph *periph)
1019 {
1020         struct cam_ed *device;
1021
1022         device = periph->path->device;
1023         if (device != NULL) {
1024                 mtx_lock(&device->target->bus->eb_mtx);
1025                 device->generation++;
1026                 SLIST_REMOVE(&device->periphs, periph, cam_periph, periph_links);
1027                 mtx_unlock(&device->target->bus->eb_mtx);
1028                 atomic_add_32(&xsoftc.xpt_generation, 1);
1029         }
1030 }
1031
1032
1033 void
1034 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1035 {
1036         struct  cam_path *path = periph->path;
1037         struct  xpt_proto *proto;
1038
1039         cam_periph_assert(periph, MA_OWNED);
1040         periph->flags |= CAM_PERIPH_ANNOUNCED;
1041
1042         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1043                periph->periph_name, periph->unit_number,
1044                path->bus->sim->sim_name,
1045                path->bus->sim->unit_number,
1046                path->bus->sim->bus_id,
1047                path->bus->path_id,
1048                path->target->target_id,
1049                (uintmax_t)path->device->lun_id);
1050         printf("%s%d: ", periph->periph_name, periph->unit_number);
1051         proto = xpt_proto_find(path->device->protocol);
1052         if (proto)
1053                 proto->ops->announce(path->device);
1054         else
1055                 printf("%s%d: Unknown protocol device %d\n",
1056                     periph->periph_name, periph->unit_number,
1057                     path->device->protocol);
1058         if (path->device->serial_num_len > 0) {
1059                 /* Don't wrap the screen  - print only the first 60 chars */
1060                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1061                        periph->unit_number, path->device->serial_num);
1062         }
1063         /* Announce transport details. */
1064         path->bus->xport->ops->announce(periph);
1065         /* Announce command queueing. */
1066         if (path->device->inq_flags & SID_CmdQue
1067          || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1068                 printf("%s%d: Command Queueing enabled\n",
1069                        periph->periph_name, periph->unit_number);
1070         }
1071         /* Announce caller's details if they've passed in. */
1072         if (announce_string != NULL)
1073                 printf("%s%d: %s\n", periph->periph_name,
1074                        periph->unit_number, announce_string);
1075 }
1076
1077 void
1078 xpt_announce_quirks(struct cam_periph *periph, int quirks, char *bit_string)
1079 {
1080         if (quirks != 0) {
1081                 printf("%s%d: quirks=0x%b\n", periph->periph_name,
1082                     periph->unit_number, quirks, bit_string);
1083         }
1084 }
1085
1086 void
1087 xpt_denounce_periph(struct cam_periph *periph)
1088 {
1089         struct  cam_path *path = periph->path;
1090         struct  xpt_proto *proto;
1091
1092         cam_periph_assert(periph, MA_OWNED);
1093         printf("%s%d at %s%d bus %d scbus%d target %d lun %jx\n",
1094                periph->periph_name, periph->unit_number,
1095                path->bus->sim->sim_name,
1096                path->bus->sim->unit_number,
1097                path->bus->sim->bus_id,
1098                path->bus->path_id,
1099                path->target->target_id,
1100                (uintmax_t)path->device->lun_id);
1101         printf("%s%d: ", periph->periph_name, periph->unit_number);
1102         proto = xpt_proto_find(path->device->protocol);
1103         if (proto)
1104                 proto->ops->denounce(path->device);
1105         else
1106                 printf("%s%d: Unknown protocol device %d\n",
1107                     periph->periph_name, periph->unit_number,
1108                     path->device->protocol);
1109         if (path->device->serial_num_len > 0)
1110                 printf(" s/n %.60s", path->device->serial_num);
1111         printf(" detached\n");
1112 }
1113
1114
1115 int
1116 xpt_getattr(char *buf, size_t len, const char *attr, struct cam_path *path)
1117 {
1118         int ret = -1, l;
1119         struct ccb_dev_advinfo cdai;
1120         struct scsi_vpd_id_descriptor *idd;
1121
1122         xpt_path_assert(path, MA_OWNED);
1123
1124         memset(&cdai, 0, sizeof(cdai));
1125         xpt_setup_ccb(&cdai.ccb_h, path, CAM_PRIORITY_NORMAL);
1126         cdai.ccb_h.func_code = XPT_DEV_ADVINFO;
1127         cdai.flags = CDAI_FLAG_NONE;
1128         cdai.bufsiz = len;
1129
1130         if (!strcmp(attr, "GEOM::ident"))
1131                 cdai.buftype = CDAI_TYPE_SERIAL_NUM;
1132         else if (!strcmp(attr, "GEOM::physpath"))
1133                 cdai.buftype = CDAI_TYPE_PHYS_PATH;
1134         else if (strcmp(attr, "GEOM::lunid") == 0 ||
1135                  strcmp(attr, "GEOM::lunname") == 0) {
1136                 cdai.buftype = CDAI_TYPE_SCSI_DEVID;
1137                 cdai.bufsiz = CAM_SCSI_DEVID_MAXLEN;
1138         } else
1139                 goto out;
1140
1141         cdai.buf = malloc(cdai.bufsiz, M_CAMXPT, M_NOWAIT|M_ZERO);
1142         if (cdai.buf == NULL) {
1143                 ret = ENOMEM;
1144                 goto out;
1145         }
1146         xpt_action((union ccb *)&cdai); /* can only be synchronous */
1147         if ((cdai.ccb_h.status & CAM_DEV_QFRZN) != 0)
1148                 cam_release_devq(cdai.ccb_h.path, 0, 0, 0, FALSE);
1149         if (cdai.provsiz == 0)
1150                 goto out;
1151         if (cdai.buftype == CDAI_TYPE_SCSI_DEVID) {
1152                 if (strcmp(attr, "GEOM::lunid") == 0) {
1153                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1154                             cdai.provsiz, scsi_devid_is_lun_naa);
1155                         if (idd == NULL)
1156                                 idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1157                                     cdai.provsiz, scsi_devid_is_lun_eui64);
1158                 } else
1159                         idd = NULL;
1160                 if (idd == NULL)
1161                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1162                             cdai.provsiz, scsi_devid_is_lun_t10);
1163                 if (idd == NULL)
1164                         idd = scsi_get_devid((struct scsi_vpd_device_id *)cdai.buf,
1165                             cdai.provsiz, scsi_devid_is_lun_name);
1166                 if (idd == NULL)
1167                         goto out;
1168                 ret = 0;
1169                 if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_ASCII) {
1170                         if (idd->length < len) {
1171                                 for (l = 0; l < idd->length; l++)
1172                                         buf[l] = idd->identifier[l] ?
1173                                             idd->identifier[l] : ' ';
1174                                 buf[l] = 0;
1175                         } else
1176                                 ret = EFAULT;
1177                 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1178                         l = strnlen(idd->identifier, idd->length);
1179                         if (l < len) {
1180                                 bcopy(idd->identifier, buf, l);
1181                                 buf[l] = 0;
1182                         } else
1183                                 ret = EFAULT;
1184                 } else {
1185                         if (idd->length * 2 < len) {
1186                                 for (l = 0; l < idd->length; l++)
1187                                         sprintf(buf + l * 2, "%02x",
1188                                             idd->identifier[l]);
1189                         } else
1190                                 ret = EFAULT;
1191                 }
1192         } else {
1193                 ret = 0;
1194                 if (strlcpy(buf, cdai.buf, len) >= len)
1195                         ret = EFAULT;
1196         }
1197
1198 out:
1199         if (cdai.buf != NULL)
1200                 free(cdai.buf, M_CAMXPT);
1201         return ret;
1202 }
1203
1204 static dev_match_ret
1205 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1206             struct cam_eb *bus)
1207 {
1208         dev_match_ret retval;
1209         u_int i;
1210
1211         retval = DM_RET_NONE;
1212
1213         /*
1214          * If we aren't given something to match against, that's an error.
1215          */
1216         if (bus == NULL)
1217                 return(DM_RET_ERROR);
1218
1219         /*
1220          * If there are no match entries, then this bus matches no
1221          * matter what.
1222          */
1223         if ((patterns == NULL) || (num_patterns == 0))
1224                 return(DM_RET_DESCEND | DM_RET_COPY);
1225
1226         for (i = 0; i < num_patterns; i++) {
1227                 struct bus_match_pattern *cur_pattern;
1228
1229                 /*
1230                  * If the pattern in question isn't for a bus node, we
1231                  * aren't interested.  However, we do indicate to the
1232                  * calling routine that we should continue descending the
1233                  * tree, since the user wants to match against lower-level
1234                  * EDT elements.
1235                  */
1236                 if (patterns[i].type != DEV_MATCH_BUS) {
1237                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1238                                 retval |= DM_RET_DESCEND;
1239                         continue;
1240                 }
1241
1242                 cur_pattern = &patterns[i].pattern.bus_pattern;
1243
1244                 /*
1245                  * If they want to match any bus node, we give them any
1246                  * device node.
1247                  */
1248                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1249                         /* set the copy flag */
1250                         retval |= DM_RET_COPY;
1251
1252                         /*
1253                          * If we've already decided on an action, go ahead
1254                          * and return.
1255                          */
1256                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1257                                 return(retval);
1258                 }
1259
1260                 /*
1261                  * Not sure why someone would do this...
1262                  */
1263                 if (cur_pattern->flags == BUS_MATCH_NONE)
1264                         continue;
1265
1266                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1267                  && (cur_pattern->path_id != bus->path_id))
1268                         continue;
1269
1270                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1271                  && (cur_pattern->bus_id != bus->sim->bus_id))
1272                         continue;
1273
1274                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1275                  && (cur_pattern->unit_number != bus->sim->unit_number))
1276                         continue;
1277
1278                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1279                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1280                              DEV_IDLEN) != 0))
1281                         continue;
1282
1283                 /*
1284                  * If we get to this point, the user definitely wants
1285                  * information on this bus.  So tell the caller to copy the
1286                  * data out.
1287                  */
1288                 retval |= DM_RET_COPY;
1289
1290                 /*
1291                  * If the return action has been set to descend, then we
1292                  * know that we've already seen a non-bus matching
1293                  * expression, therefore we need to further descend the tree.
1294                  * This won't change by continuing around the loop, so we
1295                  * go ahead and return.  If we haven't seen a non-bus
1296                  * matching expression, we keep going around the loop until
1297                  * we exhaust the matching expressions.  We'll set the stop
1298                  * flag once we fall out of the loop.
1299                  */
1300                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1301                         return(retval);
1302         }
1303
1304         /*
1305          * If the return action hasn't been set to descend yet, that means
1306          * we haven't seen anything other than bus matching patterns.  So
1307          * tell the caller to stop descending the tree -- the user doesn't
1308          * want to match against lower level tree elements.
1309          */
1310         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1311                 retval |= DM_RET_STOP;
1312
1313         return(retval);
1314 }
1315
1316 static dev_match_ret
1317 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1318                struct cam_ed *device)
1319 {
1320         dev_match_ret retval;
1321         u_int i;
1322
1323         retval = DM_RET_NONE;
1324
1325         /*
1326          * If we aren't given something to match against, that's an error.
1327          */
1328         if (device == NULL)
1329                 return(DM_RET_ERROR);
1330
1331         /*
1332          * If there are no match entries, then this device matches no
1333          * matter what.
1334          */
1335         if ((patterns == NULL) || (num_patterns == 0))
1336                 return(DM_RET_DESCEND | DM_RET_COPY);
1337
1338         for (i = 0; i < num_patterns; i++) {
1339                 struct device_match_pattern *cur_pattern;
1340                 struct scsi_vpd_device_id *device_id_page;
1341
1342                 /*
1343                  * If the pattern in question isn't for a device node, we
1344                  * aren't interested.
1345                  */
1346                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1347                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1348                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1349                                 retval |= DM_RET_DESCEND;
1350                         continue;
1351                 }
1352
1353                 cur_pattern = &patterns[i].pattern.device_pattern;
1354
1355                 /* Error out if mutually exclusive options are specified. */
1356                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1357                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1358                         return(DM_RET_ERROR);
1359
1360                 /*
1361                  * If they want to match any device node, we give them any
1362                  * device node.
1363                  */
1364                 if (cur_pattern->flags == DEV_MATCH_ANY)
1365                         goto copy_dev_node;
1366
1367                 /*
1368                  * Not sure why someone would do this...
1369                  */
1370                 if (cur_pattern->flags == DEV_MATCH_NONE)
1371                         continue;
1372
1373                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1374                  && (cur_pattern->path_id != device->target->bus->path_id))
1375                         continue;
1376
1377                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1378                  && (cur_pattern->target_id != device->target->target_id))
1379                         continue;
1380
1381                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1382                  && (cur_pattern->target_lun != device->lun_id))
1383                         continue;
1384
1385                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1386                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1387                                     (caddr_t)&cur_pattern->data.inq_pat,
1388                                     1, sizeof(cur_pattern->data.inq_pat),
1389                                     scsi_static_inquiry_match) == NULL))
1390                         continue;
1391
1392                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1393                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1394                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1395                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1396                                       device->device_id_len
1397                                     - SVPD_DEVICE_ID_HDR_LEN,
1398                                       cur_pattern->data.devid_pat.id,
1399                                       cur_pattern->data.devid_pat.id_len) != 0))
1400                         continue;
1401
1402 copy_dev_node:
1403                 /*
1404                  * If we get to this point, the user definitely wants
1405                  * information on this device.  So tell the caller to copy
1406                  * the data out.
1407                  */
1408                 retval |= DM_RET_COPY;
1409
1410                 /*
1411                  * If the return action has been set to descend, then we
1412                  * know that we've already seen a peripheral matching
1413                  * expression, therefore we need to further descend the tree.
1414                  * This won't change by continuing around the loop, so we
1415                  * go ahead and return.  If we haven't seen a peripheral
1416                  * matching expression, we keep going around the loop until
1417                  * we exhaust the matching expressions.  We'll set the stop
1418                  * flag once we fall out of the loop.
1419                  */
1420                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1421                         return(retval);
1422         }
1423
1424         /*
1425          * If the return action hasn't been set to descend yet, that means
1426          * we haven't seen any peripheral matching patterns.  So tell the
1427          * caller to stop descending the tree -- the user doesn't want to
1428          * match against lower level tree elements.
1429          */
1430         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1431                 retval |= DM_RET_STOP;
1432
1433         return(retval);
1434 }
1435
1436 /*
1437  * Match a single peripheral against any number of match patterns.
1438  */
1439 static dev_match_ret
1440 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1441                struct cam_periph *periph)
1442 {
1443         dev_match_ret retval;
1444         u_int i;
1445
1446         /*
1447          * If we aren't given something to match against, that's an error.
1448          */
1449         if (periph == NULL)
1450                 return(DM_RET_ERROR);
1451
1452         /*
1453          * If there are no match entries, then this peripheral matches no
1454          * matter what.
1455          */
1456         if ((patterns == NULL) || (num_patterns == 0))
1457                 return(DM_RET_STOP | DM_RET_COPY);
1458
1459         /*
1460          * There aren't any nodes below a peripheral node, so there's no
1461          * reason to descend the tree any further.
1462          */
1463         retval = DM_RET_STOP;
1464
1465         for (i = 0; i < num_patterns; i++) {
1466                 struct periph_match_pattern *cur_pattern;
1467
1468                 /*
1469                  * If the pattern in question isn't for a peripheral, we
1470                  * aren't interested.
1471                  */
1472                 if (patterns[i].type != DEV_MATCH_PERIPH)
1473                         continue;
1474
1475                 cur_pattern = &patterns[i].pattern.periph_pattern;
1476
1477                 /*
1478                  * If they want to match on anything, then we will do so.
1479                  */
1480                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1481                         /* set the copy flag */
1482                         retval |= DM_RET_COPY;
1483
1484                         /*
1485                          * We've already set the return action to stop,
1486                          * since there are no nodes below peripherals in
1487                          * the tree.
1488                          */
1489                         return(retval);
1490                 }
1491
1492                 /*
1493                  * Not sure why someone would do this...
1494                  */
1495                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1496                         continue;
1497
1498                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1499                  && (cur_pattern->path_id != periph->path->bus->path_id))
1500                         continue;
1501
1502                 /*
1503                  * For the target and lun id's, we have to make sure the
1504                  * target and lun pointers aren't NULL.  The xpt peripheral
1505                  * has a wildcard target and device.
1506                  */
1507                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1508                  && ((periph->path->target == NULL)
1509                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1510                         continue;
1511
1512                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1513                  && ((periph->path->device == NULL)
1514                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1515                         continue;
1516
1517                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1518                  && (cur_pattern->unit_number != periph->unit_number))
1519                         continue;
1520
1521                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1522                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1523                              DEV_IDLEN) != 0))
1524                         continue;
1525
1526                 /*
1527                  * If we get to this point, the user definitely wants
1528                  * information on this peripheral.  So tell the caller to
1529                  * copy the data out.
1530                  */
1531                 retval |= DM_RET_COPY;
1532
1533                 /*
1534                  * The return action has already been set to stop, since
1535                  * peripherals don't have any nodes below them in the EDT.
1536                  */
1537                 return(retval);
1538         }
1539
1540         /*
1541          * If we get to this point, the peripheral that was passed in
1542          * doesn't match any of the patterns.
1543          */
1544         return(retval);
1545 }
1546
1547 static int
1548 xptedtbusfunc(struct cam_eb *bus, void *arg)
1549 {
1550         struct ccb_dev_match *cdm;
1551         struct cam_et *target;
1552         dev_match_ret retval;
1553
1554         cdm = (struct ccb_dev_match *)arg;
1555
1556         /*
1557          * If our position is for something deeper in the tree, that means
1558          * that we've already seen this node.  So, we keep going down.
1559          */
1560         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1561          && (cdm->pos.cookie.bus == bus)
1562          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1563          && (cdm->pos.cookie.target != NULL))
1564                 retval = DM_RET_DESCEND;
1565         else
1566                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1567
1568         /*
1569          * If we got an error, bail out of the search.
1570          */
1571         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1572                 cdm->status = CAM_DEV_MATCH_ERROR;
1573                 return(0);
1574         }
1575
1576         /*
1577          * If the copy flag is set, copy this bus out.
1578          */
1579         if (retval & DM_RET_COPY) {
1580                 int spaceleft, j;
1581
1582                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1583                         sizeof(struct dev_match_result));
1584
1585                 /*
1586                  * If we don't have enough space to put in another
1587                  * match result, save our position and tell the
1588                  * user there are more devices to check.
1589                  */
1590                 if (spaceleft < sizeof(struct dev_match_result)) {
1591                         bzero(&cdm->pos, sizeof(cdm->pos));
1592                         cdm->pos.position_type =
1593                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1594
1595                         cdm->pos.cookie.bus = bus;
1596                         cdm->pos.generations[CAM_BUS_GENERATION]=
1597                                 xsoftc.bus_generation;
1598                         cdm->status = CAM_DEV_MATCH_MORE;
1599                         return(0);
1600                 }
1601                 j = cdm->num_matches;
1602                 cdm->num_matches++;
1603                 cdm->matches[j].type = DEV_MATCH_BUS;
1604                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1605                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1606                 cdm->matches[j].result.bus_result.unit_number =
1607                         bus->sim->unit_number;
1608                 strncpy(cdm->matches[j].result.bus_result.dev_name,
1609                         bus->sim->sim_name, DEV_IDLEN);
1610         }
1611
1612         /*
1613          * If the user is only interested in busses, there's no
1614          * reason to descend to the next level in the tree.
1615          */
1616         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1617                 return(1);
1618
1619         /*
1620          * If there is a target generation recorded, check it to
1621          * make sure the target list hasn't changed.
1622          */
1623         mtx_lock(&bus->eb_mtx);
1624         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1625          && (cdm->pos.cookie.bus == bus)
1626          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1627          && (cdm->pos.cookie.target != NULL)) {
1628                 if ((cdm->pos.generations[CAM_TARGET_GENERATION] !=
1629                     bus->generation)) {
1630                         mtx_unlock(&bus->eb_mtx);
1631                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1632                         return (0);
1633                 }
1634                 target = (struct cam_et *)cdm->pos.cookie.target;
1635                 target->refcount++;
1636         } else
1637                 target = NULL;
1638         mtx_unlock(&bus->eb_mtx);
1639
1640         return (xpttargettraverse(bus, target, xptedttargetfunc, arg));
1641 }
1642
1643 static int
1644 xptedttargetfunc(struct cam_et *target, void *arg)
1645 {
1646         struct ccb_dev_match *cdm;
1647         struct cam_eb *bus;
1648         struct cam_ed *device;
1649
1650         cdm = (struct ccb_dev_match *)arg;
1651         bus = target->bus;
1652
1653         /*
1654          * If there is a device list generation recorded, check it to
1655          * make sure the device list hasn't changed.
1656          */
1657         mtx_lock(&bus->eb_mtx);
1658         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1659          && (cdm->pos.cookie.bus == bus)
1660          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1661          && (cdm->pos.cookie.target == target)
1662          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1663          && (cdm->pos.cookie.device != NULL)) {
1664                 if (cdm->pos.generations[CAM_DEV_GENERATION] !=
1665                     target->generation) {
1666                         mtx_unlock(&bus->eb_mtx);
1667                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1668                         return(0);
1669                 }
1670                 device = (struct cam_ed *)cdm->pos.cookie.device;
1671                 device->refcount++;
1672         } else
1673                 device = NULL;
1674         mtx_unlock(&bus->eb_mtx);
1675
1676         return (xptdevicetraverse(target, device, xptedtdevicefunc, arg));
1677 }
1678
1679 static int
1680 xptedtdevicefunc(struct cam_ed *device, void *arg)
1681 {
1682         struct cam_eb *bus;
1683         struct cam_periph *periph;
1684         struct ccb_dev_match *cdm;
1685         dev_match_ret retval;
1686
1687         cdm = (struct ccb_dev_match *)arg;
1688         bus = device->target->bus;
1689
1690         /*
1691          * If our position is for something deeper in the tree, that means
1692          * that we've already seen this node.  So, we keep going down.
1693          */
1694         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1695          && (cdm->pos.cookie.device == device)
1696          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1697          && (cdm->pos.cookie.periph != NULL))
1698                 retval = DM_RET_DESCEND;
1699         else
1700                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1701                                         device);
1702
1703         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1704                 cdm->status = CAM_DEV_MATCH_ERROR;
1705                 return(0);
1706         }
1707
1708         /*
1709          * If the copy flag is set, copy this device out.
1710          */
1711         if (retval & DM_RET_COPY) {
1712                 int spaceleft, j;
1713
1714                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1715                         sizeof(struct dev_match_result));
1716
1717                 /*
1718                  * If we don't have enough space to put in another
1719                  * match result, save our position and tell the
1720                  * user there are more devices to check.
1721                  */
1722                 if (spaceleft < sizeof(struct dev_match_result)) {
1723                         bzero(&cdm->pos, sizeof(cdm->pos));
1724                         cdm->pos.position_type =
1725                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1726                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1727
1728                         cdm->pos.cookie.bus = device->target->bus;
1729                         cdm->pos.generations[CAM_BUS_GENERATION]=
1730                                 xsoftc.bus_generation;
1731                         cdm->pos.cookie.target = device->target;
1732                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1733                                 device->target->bus->generation;
1734                         cdm->pos.cookie.device = device;
1735                         cdm->pos.generations[CAM_DEV_GENERATION] =
1736                                 device->target->generation;
1737                         cdm->status = CAM_DEV_MATCH_MORE;
1738                         return(0);
1739                 }
1740                 j = cdm->num_matches;
1741                 cdm->num_matches++;
1742                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1743                 cdm->matches[j].result.device_result.path_id =
1744                         device->target->bus->path_id;
1745                 cdm->matches[j].result.device_result.target_id =
1746                         device->target->target_id;
1747                 cdm->matches[j].result.device_result.target_lun =
1748                         device->lun_id;
1749                 cdm->matches[j].result.device_result.protocol =
1750                         device->protocol;
1751                 bcopy(&device->inq_data,
1752                       &cdm->matches[j].result.device_result.inq_data,
1753                       sizeof(struct scsi_inquiry_data));
1754                 bcopy(&device->ident_data,
1755                       &cdm->matches[j].result.device_result.ident_data,
1756                       sizeof(struct ata_params));
1757
1758                 /* Let the user know whether this device is unconfigured */
1759                 if (device->flags & CAM_DEV_UNCONFIGURED)
1760                         cdm->matches[j].result.device_result.flags =
1761                                 DEV_RESULT_UNCONFIGURED;
1762                 else
1763                         cdm->matches[j].result.device_result.flags =
1764                                 DEV_RESULT_NOFLAG;
1765         }
1766
1767         /*
1768          * If the user isn't interested in peripherals, don't descend
1769          * the tree any further.
1770          */
1771         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1772                 return(1);
1773
1774         /*
1775          * If there is a peripheral list generation recorded, make sure
1776          * it hasn't changed.
1777          */
1778         xpt_lock_buses();
1779         mtx_lock(&bus->eb_mtx);
1780         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1781          && (cdm->pos.cookie.bus == bus)
1782          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1783          && (cdm->pos.cookie.target == device->target)
1784          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1785          && (cdm->pos.cookie.device == device)
1786          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1787          && (cdm->pos.cookie.periph != NULL)) {
1788                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1789                     device->generation) {
1790                         mtx_unlock(&bus->eb_mtx);
1791                         xpt_unlock_buses();
1792                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1793                         return(0);
1794                 }
1795                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1796                 periph->refcount++;
1797         } else
1798                 periph = NULL;
1799         mtx_unlock(&bus->eb_mtx);
1800         xpt_unlock_buses();
1801
1802         return (xptperiphtraverse(device, periph, xptedtperiphfunc, arg));
1803 }
1804
1805 static int
1806 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1807 {
1808         struct ccb_dev_match *cdm;
1809         dev_match_ret retval;
1810
1811         cdm = (struct ccb_dev_match *)arg;
1812
1813         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1814
1815         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1816                 cdm->status = CAM_DEV_MATCH_ERROR;
1817                 return(0);
1818         }
1819
1820         /*
1821          * If the copy flag is set, copy this peripheral out.
1822          */
1823         if (retval & DM_RET_COPY) {
1824                 int spaceleft, j;
1825
1826                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1827                         sizeof(struct dev_match_result));
1828
1829                 /*
1830                  * If we don't have enough space to put in another
1831                  * match result, save our position and tell the
1832                  * user there are more devices to check.
1833                  */
1834                 if (spaceleft < sizeof(struct dev_match_result)) {
1835                         bzero(&cdm->pos, sizeof(cdm->pos));
1836                         cdm->pos.position_type =
1837                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1838                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1839                                 CAM_DEV_POS_PERIPH;
1840
1841                         cdm->pos.cookie.bus = periph->path->bus;
1842                         cdm->pos.generations[CAM_BUS_GENERATION]=
1843                                 xsoftc.bus_generation;
1844                         cdm->pos.cookie.target = periph->path->target;
1845                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1846                                 periph->path->bus->generation;
1847                         cdm->pos.cookie.device = periph->path->device;
1848                         cdm->pos.generations[CAM_DEV_GENERATION] =
1849                                 periph->path->target->generation;
1850                         cdm->pos.cookie.periph = periph;
1851                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1852                                 periph->path->device->generation;
1853                         cdm->status = CAM_DEV_MATCH_MORE;
1854                         return(0);
1855                 }
1856
1857                 j = cdm->num_matches;
1858                 cdm->num_matches++;
1859                 cdm->matches[j].type = DEV_MATCH_PERIPH;
1860                 cdm->matches[j].result.periph_result.path_id =
1861                         periph->path->bus->path_id;
1862                 cdm->matches[j].result.periph_result.target_id =
1863                         periph->path->target->target_id;
1864                 cdm->matches[j].result.periph_result.target_lun =
1865                         periph->path->device->lun_id;
1866                 cdm->matches[j].result.periph_result.unit_number =
1867                         periph->unit_number;
1868                 strncpy(cdm->matches[j].result.periph_result.periph_name,
1869                         periph->periph_name, DEV_IDLEN);
1870         }
1871
1872         return(1);
1873 }
1874
1875 static int
1876 xptedtmatch(struct ccb_dev_match *cdm)
1877 {
1878         struct cam_eb *bus;
1879         int ret;
1880
1881         cdm->num_matches = 0;
1882
1883         /*
1884          * Check the bus list generation.  If it has changed, the user
1885          * needs to reset everything and start over.
1886          */
1887         xpt_lock_buses();
1888         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1889          && (cdm->pos.cookie.bus != NULL)) {
1890                 if (cdm->pos.generations[CAM_BUS_GENERATION] !=
1891                     xsoftc.bus_generation) {
1892                         xpt_unlock_buses();
1893                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1894                         return(0);
1895                 }
1896                 bus = (struct cam_eb *)cdm->pos.cookie.bus;
1897                 bus->refcount++;
1898         } else
1899                 bus = NULL;
1900         xpt_unlock_buses();
1901
1902         ret = xptbustraverse(bus, xptedtbusfunc, cdm);
1903
1904         /*
1905          * If we get back 0, that means that we had to stop before fully
1906          * traversing the EDT.  It also means that one of the subroutines
1907          * has set the status field to the proper value.  If we get back 1,
1908          * we've fully traversed the EDT and copied out any matching entries.
1909          */
1910         if (ret == 1)
1911                 cdm->status = CAM_DEV_MATCH_LAST;
1912
1913         return(ret);
1914 }
1915
1916 static int
1917 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
1918 {
1919         struct cam_periph *periph;
1920         struct ccb_dev_match *cdm;
1921
1922         cdm = (struct ccb_dev_match *)arg;
1923
1924         xpt_lock_buses();
1925         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1926          && (cdm->pos.cookie.pdrv == pdrv)
1927          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1928          && (cdm->pos.cookie.periph != NULL)) {
1929                 if (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1930                     (*pdrv)->generation) {
1931                         xpt_unlock_buses();
1932                         cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1933                         return(0);
1934                 }
1935                 periph = (struct cam_periph *)cdm->pos.cookie.periph;
1936                 periph->refcount++;
1937         } else
1938                 periph = NULL;
1939         xpt_unlock_buses();
1940
1941         return (xptpdperiphtraverse(pdrv, periph, xptplistperiphfunc, arg));
1942 }
1943
1944 static int
1945 xptplistperiphfunc(struct cam_periph *periph, void *arg)
1946 {
1947         struct ccb_dev_match *cdm;
1948         dev_match_ret retval;
1949
1950         cdm = (struct ccb_dev_match *)arg;
1951
1952         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1953
1954         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1955                 cdm->status = CAM_DEV_MATCH_ERROR;
1956                 return(0);
1957         }
1958
1959         /*
1960          * If the copy flag is set, copy this peripheral out.
1961          */
1962         if (retval & DM_RET_COPY) {
1963                 int spaceleft, j;
1964
1965                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1966                         sizeof(struct dev_match_result));
1967
1968                 /*
1969                  * If we don't have enough space to put in another
1970                  * match result, save our position and tell the
1971                  * user there are more devices to check.
1972                  */
1973                 if (spaceleft < sizeof(struct dev_match_result)) {
1974                         struct periph_driver **pdrv;
1975
1976                         pdrv = NULL;
1977                         bzero(&cdm->pos, sizeof(cdm->pos));
1978                         cdm->pos.position_type =
1979                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
1980                                 CAM_DEV_POS_PERIPH;
1981
1982                         /*
1983                          * This may look a bit non-sensical, but it is
1984                          * actually quite logical.  There are very few
1985                          * peripheral drivers, and bloating every peripheral
1986                          * structure with a pointer back to its parent
1987                          * peripheral driver linker set entry would cost
1988                          * more in the long run than doing this quick lookup.
1989                          */
1990                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
1991                                 if (strcmp((*pdrv)->driver_name,
1992                                     periph->periph_name) == 0)
1993                                         break;
1994                         }
1995
1996                         if (*pdrv == NULL) {
1997                                 cdm->status = CAM_DEV_MATCH_ERROR;
1998                                 return(0);
1999                         }
2000
2001                         cdm->pos.cookie.pdrv = pdrv;
2002                         /*
2003                          * The periph generation slot does double duty, as
2004                          * does the periph pointer slot.  They are used for
2005                          * both edt and pdrv lookups and positioning.
2006                          */
2007                         cdm->pos.cookie.periph = periph;
2008                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2009                                 (*pdrv)->generation;
2010                         cdm->status = CAM_DEV_MATCH_MORE;
2011                         return(0);
2012                 }
2013
2014                 j = cdm->num_matches;
2015                 cdm->num_matches++;
2016                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2017                 cdm->matches[j].result.periph_result.path_id =
2018                         periph->path->bus->path_id;
2019
2020                 /*
2021                  * The transport layer peripheral doesn't have a target or
2022                  * lun.
2023                  */
2024                 if (periph->path->target)
2025                         cdm->matches[j].result.periph_result.target_id =
2026                                 periph->path->target->target_id;
2027                 else
2028                         cdm->matches[j].result.periph_result.target_id =
2029                                 CAM_TARGET_WILDCARD;
2030
2031                 if (periph->path->device)
2032                         cdm->matches[j].result.periph_result.target_lun =
2033                                 periph->path->device->lun_id;
2034                 else
2035                         cdm->matches[j].result.periph_result.target_lun =
2036                                 CAM_LUN_WILDCARD;
2037
2038                 cdm->matches[j].result.periph_result.unit_number =
2039                         periph->unit_number;
2040                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2041                         periph->periph_name, DEV_IDLEN);
2042         }
2043
2044         return(1);
2045 }
2046
2047 static int
2048 xptperiphlistmatch(struct ccb_dev_match *cdm)
2049 {
2050         int ret;
2051
2052         cdm->num_matches = 0;
2053
2054         /*
2055          * At this point in the edt traversal function, we check the bus
2056          * list generation to make sure that no busses have been added or
2057          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2058          * For the peripheral driver list traversal function, however, we
2059          * don't have to worry about new peripheral driver types coming or
2060          * going; they're in a linker set, and therefore can't change
2061          * without a recompile.
2062          */
2063
2064         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2065          && (cdm->pos.cookie.pdrv != NULL))
2066                 ret = xptpdrvtraverse(
2067                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2068                                 xptplistpdrvfunc, cdm);
2069         else
2070                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2071
2072         /*
2073          * If we get back 0, that means that we had to stop before fully
2074          * traversing the peripheral driver tree.  It also means that one of
2075          * the subroutines has set the status field to the proper value.  If
2076          * we get back 1, we've fully traversed the EDT and copied out any
2077          * matching entries.
2078          */
2079         if (ret == 1)
2080                 cdm->status = CAM_DEV_MATCH_LAST;
2081
2082         return(ret);
2083 }
2084
2085 static int
2086 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2087 {
2088         struct cam_eb *bus, *next_bus;
2089         int retval;
2090
2091         retval = 1;
2092         if (start_bus)
2093                 bus = start_bus;
2094         else {
2095                 xpt_lock_buses();
2096                 bus = TAILQ_FIRST(&xsoftc.xpt_busses);
2097                 if (bus == NULL) {
2098                         xpt_unlock_buses();
2099                         return (retval);
2100                 }
2101                 bus->refcount++;
2102                 xpt_unlock_buses();
2103         }
2104         for (; bus != NULL; bus = next_bus) {
2105                 retval = tr_func(bus, arg);
2106                 if (retval == 0) {
2107                         xpt_release_bus(bus);
2108                         break;
2109                 }
2110                 xpt_lock_buses();
2111                 next_bus = TAILQ_NEXT(bus, links);
2112                 if (next_bus)
2113                         next_bus->refcount++;
2114                 xpt_unlock_buses();
2115                 xpt_release_bus(bus);
2116         }
2117         return(retval);
2118 }
2119
2120 static int
2121 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2122                   xpt_targetfunc_t *tr_func, void *arg)
2123 {
2124         struct cam_et *target, *next_target;
2125         int retval;
2126
2127         retval = 1;
2128         if (start_target)
2129                 target = start_target;
2130         else {
2131                 mtx_lock(&bus->eb_mtx);
2132                 target = TAILQ_FIRST(&bus->et_entries);
2133                 if (target == NULL) {
2134                         mtx_unlock(&bus->eb_mtx);
2135                         return (retval);
2136                 }
2137                 target->refcount++;
2138                 mtx_unlock(&bus->eb_mtx);
2139         }
2140         for (; target != NULL; target = next_target) {
2141                 retval = tr_func(target, arg);
2142                 if (retval == 0) {
2143                         xpt_release_target(target);
2144                         break;
2145                 }
2146                 mtx_lock(&bus->eb_mtx);
2147                 next_target = TAILQ_NEXT(target, links);
2148                 if (next_target)
2149                         next_target->refcount++;
2150                 mtx_unlock(&bus->eb_mtx);
2151                 xpt_release_target(target);
2152         }
2153         return(retval);
2154 }
2155
2156 static int
2157 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2158                   xpt_devicefunc_t *tr_func, void *arg)
2159 {
2160         struct cam_eb *bus;
2161         struct cam_ed *device, *next_device;
2162         int retval;
2163
2164         retval = 1;
2165         bus = target->bus;
2166         if (start_device)
2167                 device = start_device;
2168         else {
2169                 mtx_lock(&bus->eb_mtx);
2170                 device = TAILQ_FIRST(&target->ed_entries);
2171                 if (device == NULL) {
2172                         mtx_unlock(&bus->eb_mtx);
2173                         return (retval);
2174                 }
2175                 device->refcount++;
2176                 mtx_unlock(&bus->eb_mtx);
2177         }
2178         for (; device != NULL; device = next_device) {
2179                 mtx_lock(&device->device_mtx);
2180                 retval = tr_func(device, arg);
2181                 mtx_unlock(&device->device_mtx);
2182                 if (retval == 0) {
2183                         xpt_release_device(device);
2184                         break;
2185                 }
2186                 mtx_lock(&bus->eb_mtx);
2187                 next_device = TAILQ_NEXT(device, links);
2188                 if (next_device)
2189                         next_device->refcount++;
2190                 mtx_unlock(&bus->eb_mtx);
2191                 xpt_release_device(device);
2192         }
2193         return(retval);
2194 }
2195
2196 static int
2197 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2198                   xpt_periphfunc_t *tr_func, void *arg)
2199 {
2200         struct cam_eb *bus;
2201         struct cam_periph *periph, *next_periph;
2202         int retval;
2203
2204         retval = 1;
2205
2206         bus = device->target->bus;
2207         if (start_periph)
2208                 periph = start_periph;
2209         else {
2210                 xpt_lock_buses();
2211                 mtx_lock(&bus->eb_mtx);
2212                 periph = SLIST_FIRST(&device->periphs);
2213                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2214                         periph = SLIST_NEXT(periph, periph_links);
2215                 if (periph == NULL) {
2216                         mtx_unlock(&bus->eb_mtx);
2217                         xpt_unlock_buses();
2218                         return (retval);
2219                 }
2220                 periph->refcount++;
2221                 mtx_unlock(&bus->eb_mtx);
2222                 xpt_unlock_buses();
2223         }
2224         for (; periph != NULL; periph = next_periph) {
2225                 retval = tr_func(periph, arg);
2226                 if (retval == 0) {
2227                         cam_periph_release_locked(periph);
2228                         break;
2229                 }
2230                 xpt_lock_buses();
2231                 mtx_lock(&bus->eb_mtx);
2232                 next_periph = SLIST_NEXT(periph, periph_links);
2233                 while (next_periph != NULL &&
2234                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2235                         next_periph = SLIST_NEXT(next_periph, periph_links);
2236                 if (next_periph)
2237                         next_periph->refcount++;
2238                 mtx_unlock(&bus->eb_mtx);
2239                 xpt_unlock_buses();
2240                 cam_periph_release_locked(periph);
2241         }
2242         return(retval);
2243 }
2244
2245 static int
2246 xptpdrvtraverse(struct periph_driver **start_pdrv,
2247                 xpt_pdrvfunc_t *tr_func, void *arg)
2248 {
2249         struct periph_driver **pdrv;
2250         int retval;
2251
2252         retval = 1;
2253
2254         /*
2255          * We don't traverse the peripheral driver list like we do the
2256          * other lists, because it is a linker set, and therefore cannot be
2257          * changed during runtime.  If the peripheral driver list is ever
2258          * re-done to be something other than a linker set (i.e. it can
2259          * change while the system is running), the list traversal should
2260          * be modified to work like the other traversal functions.
2261          */
2262         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2263              *pdrv != NULL; pdrv++) {
2264                 retval = tr_func(pdrv, arg);
2265
2266                 if (retval == 0)
2267                         return(retval);
2268         }
2269
2270         return(retval);
2271 }
2272
2273 static int
2274 xptpdperiphtraverse(struct periph_driver **pdrv,
2275                     struct cam_periph *start_periph,
2276                     xpt_periphfunc_t *tr_func, void *arg)
2277 {
2278         struct cam_periph *periph, *next_periph;
2279         int retval;
2280
2281         retval = 1;
2282
2283         if (start_periph)
2284                 periph = start_periph;
2285         else {
2286                 xpt_lock_buses();
2287                 periph = TAILQ_FIRST(&(*pdrv)->units);
2288                 while (periph != NULL && (periph->flags & CAM_PERIPH_FREE) != 0)
2289                         periph = TAILQ_NEXT(periph, unit_links);
2290                 if (periph == NULL) {
2291                         xpt_unlock_buses();
2292                         return (retval);
2293                 }
2294                 periph->refcount++;
2295                 xpt_unlock_buses();
2296         }
2297         for (; periph != NULL; periph = next_periph) {
2298                 cam_periph_lock(periph);
2299                 retval = tr_func(periph, arg);
2300                 cam_periph_unlock(periph);
2301                 if (retval == 0) {
2302                         cam_periph_release(periph);
2303                         break;
2304                 }
2305                 xpt_lock_buses();
2306                 next_periph = TAILQ_NEXT(periph, unit_links);
2307                 while (next_periph != NULL &&
2308                     (next_periph->flags & CAM_PERIPH_FREE) != 0)
2309                         next_periph = TAILQ_NEXT(next_periph, unit_links);
2310                 if (next_periph)
2311                         next_periph->refcount++;
2312                 xpt_unlock_buses();
2313                 cam_periph_release(periph);
2314         }
2315         return(retval);
2316 }
2317
2318 static int
2319 xptdefbusfunc(struct cam_eb *bus, void *arg)
2320 {
2321         struct xpt_traverse_config *tr_config;
2322
2323         tr_config = (struct xpt_traverse_config *)arg;
2324
2325         if (tr_config->depth == XPT_DEPTH_BUS) {
2326                 xpt_busfunc_t *tr_func;
2327
2328                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2329
2330                 return(tr_func(bus, tr_config->tr_arg));
2331         } else
2332                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2333 }
2334
2335 static int
2336 xptdeftargetfunc(struct cam_et *target, void *arg)
2337 {
2338         struct xpt_traverse_config *tr_config;
2339
2340         tr_config = (struct xpt_traverse_config *)arg;
2341
2342         if (tr_config->depth == XPT_DEPTH_TARGET) {
2343                 xpt_targetfunc_t *tr_func;
2344
2345                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2346
2347                 return(tr_func(target, tr_config->tr_arg));
2348         } else
2349                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2350 }
2351
2352 static int
2353 xptdefdevicefunc(struct cam_ed *device, void *arg)
2354 {
2355         struct xpt_traverse_config *tr_config;
2356
2357         tr_config = (struct xpt_traverse_config *)arg;
2358
2359         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2360                 xpt_devicefunc_t *tr_func;
2361
2362                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2363
2364                 return(tr_func(device, tr_config->tr_arg));
2365         } else
2366                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2367 }
2368
2369 static int
2370 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2371 {
2372         struct xpt_traverse_config *tr_config;
2373         xpt_periphfunc_t *tr_func;
2374
2375         tr_config = (struct xpt_traverse_config *)arg;
2376
2377         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2378
2379         /*
2380          * Unlike the other default functions, we don't check for depth
2381          * here.  The peripheral driver level is the last level in the EDT,
2382          * so if we're here, we should execute the function in question.
2383          */
2384         return(tr_func(periph, tr_config->tr_arg));
2385 }
2386
2387 /*
2388  * Execute the given function for every bus in the EDT.
2389  */
2390 static int
2391 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2392 {
2393         struct xpt_traverse_config tr_config;
2394
2395         tr_config.depth = XPT_DEPTH_BUS;
2396         tr_config.tr_func = tr_func;
2397         tr_config.tr_arg = arg;
2398
2399         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2400 }
2401
2402 /*
2403  * Execute the given function for every device in the EDT.
2404  */
2405 static int
2406 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2407 {
2408         struct xpt_traverse_config tr_config;
2409
2410         tr_config.depth = XPT_DEPTH_DEVICE;
2411         tr_config.tr_func = tr_func;
2412         tr_config.tr_arg = arg;
2413
2414         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2415 }
2416
2417 static int
2418 xptsetasyncfunc(struct cam_ed *device, void *arg)
2419 {
2420         struct cam_path path;
2421         struct ccb_getdev cgd;
2422         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2423
2424         /*
2425          * Don't report unconfigured devices (Wildcard devs,
2426          * devices only for target mode, device instances
2427          * that have been invalidated but are waiting for
2428          * their last reference count to be released).
2429          */
2430         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2431                 return (1);
2432
2433         xpt_compile_path(&path,
2434                          NULL,
2435                          device->target->bus->path_id,
2436                          device->target->target_id,
2437                          device->lun_id);
2438         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2439         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2440         xpt_action((union ccb *)&cgd);
2441         csa->callback(csa->callback_arg,
2442                             AC_FOUND_DEVICE,
2443                             &path, &cgd);
2444         xpt_release_path(&path);
2445
2446         return(1);
2447 }
2448
2449 static int
2450 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2451 {
2452         struct cam_path path;
2453         struct ccb_pathinq cpi;
2454         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2455
2456         xpt_compile_path(&path, /*periph*/NULL,
2457                          bus->path_id,
2458                          CAM_TARGET_WILDCARD,
2459                          CAM_LUN_WILDCARD);
2460         xpt_path_lock(&path);
2461         xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2462         cpi.ccb_h.func_code = XPT_PATH_INQ;
2463         xpt_action((union ccb *)&cpi);
2464         csa->callback(csa->callback_arg,
2465                             AC_PATH_REGISTERED,
2466                             &path, &cpi);
2467         xpt_path_unlock(&path);
2468         xpt_release_path(&path);
2469
2470         return(1);
2471 }
2472
2473 void
2474 xpt_action(union ccb *start_ccb)
2475 {
2476
2477         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
2478             ("xpt_action: func %#x %s\n", start_ccb->ccb_h.func_code,
2479                 xpt_action_name(start_ccb->ccb_h.func_code)));
2480
2481         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2482         (*(start_ccb->ccb_h.path->bus->xport->ops->action))(start_ccb);
2483 }
2484
2485 void
2486 xpt_action_default(union ccb *start_ccb)
2487 {
2488         struct cam_path *path;
2489         struct cam_sim *sim;
2490         int lock;
2491
2492         path = start_ccb->ccb_h.path;
2493         CAM_DEBUG(path, CAM_DEBUG_TRACE,
2494             ("xpt_action_default: func %#x %s\n", start_ccb->ccb_h.func_code,
2495                 xpt_action_name(start_ccb->ccb_h.func_code)));
2496
2497         switch (start_ccb->ccb_h.func_code) {
2498         case XPT_SCSI_IO:
2499         {
2500                 struct cam_ed *device;
2501
2502                 /*
2503                  * For the sake of compatibility with SCSI-1
2504                  * devices that may not understand the identify
2505                  * message, we include lun information in the
2506                  * second byte of all commands.  SCSI-1 specifies
2507                  * that luns are a 3 bit value and reserves only 3
2508                  * bits for lun information in the CDB.  Later
2509                  * revisions of the SCSI spec allow for more than 8
2510                  * luns, but have deprecated lun information in the
2511                  * CDB.  So, if the lun won't fit, we must omit.
2512                  *
2513                  * Also be aware that during initial probing for devices,
2514                  * the inquiry information is unknown but initialized to 0.
2515                  * This means that this code will be exercised while probing
2516                  * devices with an ANSI revision greater than 2.
2517                  */
2518                 device = path->device;
2519                 if (device->protocol_version <= SCSI_REV_2
2520                  && start_ccb->ccb_h.target_lun < 8
2521                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2522
2523                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2524                             start_ccb->ccb_h.target_lun << 5;
2525                 }
2526                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2527         }
2528         /* FALLTHROUGH */
2529         case XPT_TARGET_IO:
2530         case XPT_CONT_TARGET_IO:
2531                 start_ccb->csio.sense_resid = 0;
2532                 start_ccb->csio.resid = 0;
2533                 /* FALLTHROUGH */
2534         case XPT_ATA_IO:
2535                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2536                         start_ccb->ataio.resid = 0;
2537                 /* FALLTHROUGH */
2538         case XPT_NVME_IO:
2539                 if (start_ccb->ccb_h.func_code == XPT_NVME_IO)
2540                         start_ccb->nvmeio.resid = 0;
2541                 /* FALLTHROUGH */
2542         case XPT_RESET_DEV:
2543         case XPT_ENG_EXEC:
2544         case XPT_SMP_IO:
2545         {
2546                 struct cam_devq *devq;
2547
2548                 devq = path->bus->sim->devq;
2549                 mtx_lock(&devq->send_mtx);
2550                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2551                 if (xpt_schedule_devq(devq, path->device) != 0)
2552                         xpt_run_devq(devq);
2553                 mtx_unlock(&devq->send_mtx);
2554                 break;
2555         }
2556         case XPT_CALC_GEOMETRY:
2557                 /* Filter out garbage */
2558                 if (start_ccb->ccg.block_size == 0
2559                  || start_ccb->ccg.volume_size == 0) {
2560                         start_ccb->ccg.cylinders = 0;
2561                         start_ccb->ccg.heads = 0;
2562                         start_ccb->ccg.secs_per_track = 0;
2563                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2564                         break;
2565                 }
2566 #if defined(PC98) || defined(__sparc64__)
2567                 /*
2568                  * In a PC-98 system, geometry translation depens on
2569                  * the "real" device geometry obtained from mode page 4.
2570                  * SCSI geometry translation is performed in the
2571                  * initialization routine of the SCSI BIOS and the result
2572                  * stored in host memory.  If the translation is available
2573                  * in host memory, use it.  If not, rely on the default
2574                  * translation the device driver performs.
2575                  * For sparc64, we may need adjust the geometry of large
2576                  * disks in order to fit the limitations of the 16-bit
2577                  * fields of the VTOC8 disk label.
2578                  */
2579                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2580                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2581                         break;
2582                 }
2583 #endif
2584                 goto call_sim;
2585         case XPT_ABORT:
2586         {
2587                 union ccb* abort_ccb;
2588
2589                 abort_ccb = start_ccb->cab.abort_ccb;
2590                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2591                         struct cam_ed *device;
2592                         struct cam_devq *devq;
2593
2594                         device = abort_ccb->ccb_h.path->device;
2595                         devq = device->sim->devq;
2596
2597                         mtx_lock(&devq->send_mtx);
2598                         if (abort_ccb->ccb_h.pinfo.index > 0) {
2599                                 cam_ccbq_remove_ccb(&device->ccbq, abort_ccb);
2600                                 abort_ccb->ccb_h.status =
2601                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2602                                 xpt_freeze_devq_device(device, 1);
2603                                 mtx_unlock(&devq->send_mtx);
2604                                 xpt_done(abort_ccb);
2605                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2606                                 break;
2607                         }
2608                         mtx_unlock(&devq->send_mtx);
2609
2610                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2611                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2612                                 /*
2613                                  * We've caught this ccb en route to
2614                                  * the SIM.  Flag it for abort and the
2615                                  * SIM will do so just before starting
2616                                  * real work on the CCB.
2617                                  */
2618                                 abort_ccb->ccb_h.status =
2619                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2620                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2621                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2622                                 break;
2623                         }
2624                 }
2625                 if (XPT_FC_IS_QUEUED(abort_ccb)
2626                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2627                         /*
2628                          * It's already completed but waiting
2629                          * for our SWI to get to it.
2630                          */
2631                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2632                         break;
2633                 }
2634                 /*
2635                  * If we weren't able to take care of the abort request
2636                  * in the XPT, pass the request down to the SIM for processing.
2637                  */
2638         }
2639         /* FALLTHROUGH */
2640         case XPT_ACCEPT_TARGET_IO:
2641         case XPT_EN_LUN:
2642         case XPT_IMMED_NOTIFY:
2643         case XPT_NOTIFY_ACK:
2644         case XPT_RESET_BUS:
2645         case XPT_IMMEDIATE_NOTIFY:
2646         case XPT_NOTIFY_ACKNOWLEDGE:
2647         case XPT_GET_SIM_KNOB_OLD:
2648         case XPT_GET_SIM_KNOB:
2649         case XPT_SET_SIM_KNOB:
2650         case XPT_GET_TRAN_SETTINGS:
2651         case XPT_SET_TRAN_SETTINGS:
2652         case XPT_PATH_INQ:
2653 call_sim:
2654                 sim = path->bus->sim;
2655                 lock = (mtx_owned(sim->mtx) == 0);
2656                 if (lock)
2657                         CAM_SIM_LOCK(sim);
2658                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2659                     ("sim->sim_action: func=%#x\n", start_ccb->ccb_h.func_code));
2660                 (*(sim->sim_action))(sim, start_ccb);
2661                 CAM_DEBUG(path, CAM_DEBUG_TRACE,
2662                     ("sim->sim_action: status=%#x\n", start_ccb->ccb_h.status));
2663                 if (lock)
2664                         CAM_SIM_UNLOCK(sim);
2665                 break;
2666         case XPT_PATH_STATS:
2667                 start_ccb->cpis.last_reset = path->bus->last_reset;
2668                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2669                 break;
2670         case XPT_GDEV_TYPE:
2671         {
2672                 struct cam_ed *dev;
2673
2674                 dev = path->device;
2675                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2676                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2677                 } else {
2678                         struct ccb_getdev *cgd;
2679
2680                         cgd = &start_ccb->cgd;
2681                         cgd->protocol = dev->protocol;
2682                         cgd->inq_data = dev->inq_data;
2683                         cgd->ident_data = dev->ident_data;
2684                         cgd->inq_flags = dev->inq_flags;
2685                         cgd->nvme_data = dev->nvme_data;
2686                         cgd->nvme_cdata = dev->nvme_cdata;
2687                         cgd->ccb_h.status = CAM_REQ_CMP;
2688                         cgd->serial_num_len = dev->serial_num_len;
2689                         if ((dev->serial_num_len > 0)
2690                          && (dev->serial_num != NULL))
2691                                 bcopy(dev->serial_num, cgd->serial_num,
2692                                       dev->serial_num_len);
2693                 }
2694                 break;
2695         }
2696         case XPT_GDEV_STATS:
2697         {
2698                 struct cam_ed *dev;
2699
2700                 dev = path->device;
2701                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2702                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2703                 } else {
2704                         struct ccb_getdevstats *cgds;
2705                         struct cam_eb *bus;
2706                         struct cam_et *tar;
2707                         struct cam_devq *devq;
2708
2709                         cgds = &start_ccb->cgds;
2710                         bus = path->bus;
2711                         tar = path->target;
2712                         devq = bus->sim->devq;
2713                         mtx_lock(&devq->send_mtx);
2714                         cgds->dev_openings = dev->ccbq.dev_openings;
2715                         cgds->dev_active = dev->ccbq.dev_active;
2716                         cgds->allocated = dev->ccbq.allocated;
2717                         cgds->queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2718                         cgds->held = cgds->allocated - cgds->dev_active -
2719                             cgds->queued;
2720                         cgds->last_reset = tar->last_reset;
2721                         cgds->maxtags = dev->maxtags;
2722                         cgds->mintags = dev->mintags;
2723                         if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2724                                 cgds->last_reset = bus->last_reset;
2725                         mtx_unlock(&devq->send_mtx);
2726                         cgds->ccb_h.status = CAM_REQ_CMP;
2727                 }
2728                 break;
2729         }
2730         case XPT_GDEVLIST:
2731         {
2732                 struct cam_periph       *nperiph;
2733                 struct periph_list      *periph_head;
2734                 struct ccb_getdevlist   *cgdl;
2735                 u_int                   i;
2736                 struct cam_ed           *device;
2737                 int                     found;
2738
2739
2740                 found = 0;
2741
2742                 /*
2743                  * Don't want anyone mucking with our data.
2744                  */
2745                 device = path->device;
2746                 periph_head = &device->periphs;
2747                 cgdl = &start_ccb->cgdl;
2748
2749                 /*
2750                  * Check and see if the list has changed since the user
2751                  * last requested a list member.  If so, tell them that the
2752                  * list has changed, and therefore they need to start over
2753                  * from the beginning.
2754                  */
2755                 if ((cgdl->index != 0) &&
2756                     (cgdl->generation != device->generation)) {
2757                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2758                         break;
2759                 }
2760
2761                 /*
2762                  * Traverse the list of peripherals and attempt to find
2763                  * the requested peripheral.
2764                  */
2765                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2766                      (nperiph != NULL) && (i <= cgdl->index);
2767                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2768                         if (i == cgdl->index) {
2769                                 strncpy(cgdl->periph_name,
2770                                         nperiph->periph_name,
2771                                         DEV_IDLEN);
2772                                 cgdl->unit_number = nperiph->unit_number;
2773                                 found = 1;
2774                         }
2775                 }
2776                 if (found == 0) {
2777                         cgdl->status = CAM_GDEVLIST_ERROR;
2778                         break;
2779                 }
2780
2781                 if (nperiph == NULL)
2782                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2783                 else
2784                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2785
2786                 cgdl->index++;
2787                 cgdl->generation = device->generation;
2788
2789                 cgdl->ccb_h.status = CAM_REQ_CMP;
2790                 break;
2791         }
2792         case XPT_DEV_MATCH:
2793         {
2794                 dev_pos_type position_type;
2795                 struct ccb_dev_match *cdm;
2796
2797                 cdm = &start_ccb->cdm;
2798
2799                 /*
2800                  * There are two ways of getting at information in the EDT.
2801                  * The first way is via the primary EDT tree.  It starts
2802                  * with a list of busses, then a list of targets on a bus,
2803                  * then devices/luns on a target, and then peripherals on a
2804                  * device/lun.  The "other" way is by the peripheral driver
2805                  * lists.  The peripheral driver lists are organized by
2806                  * peripheral driver.  (obviously)  So it makes sense to
2807                  * use the peripheral driver list if the user is looking
2808                  * for something like "da1", or all "da" devices.  If the
2809                  * user is looking for something on a particular bus/target
2810                  * or lun, it's generally better to go through the EDT tree.
2811                  */
2812
2813                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2814                         position_type = cdm->pos.position_type;
2815                 else {
2816                         u_int i;
2817
2818                         position_type = CAM_DEV_POS_NONE;
2819
2820                         for (i = 0; i < cdm->num_patterns; i++) {
2821                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2822                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2823                                         position_type = CAM_DEV_POS_EDT;
2824                                         break;
2825                                 }
2826                         }
2827
2828                         if (cdm->num_patterns == 0)
2829                                 position_type = CAM_DEV_POS_EDT;
2830                         else if (position_type == CAM_DEV_POS_NONE)
2831                                 position_type = CAM_DEV_POS_PDRV;
2832                 }
2833
2834                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2835                 case CAM_DEV_POS_EDT:
2836                         xptedtmatch(cdm);
2837                         break;
2838                 case CAM_DEV_POS_PDRV:
2839                         xptperiphlistmatch(cdm);
2840                         break;
2841                 default:
2842                         cdm->status = CAM_DEV_MATCH_ERROR;
2843                         break;
2844                 }
2845
2846                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2847                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2848                 else
2849                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2850
2851                 break;
2852         }
2853         case XPT_SASYNC_CB:
2854         {
2855                 struct ccb_setasync *csa;
2856                 struct async_node *cur_entry;
2857                 struct async_list *async_head;
2858                 u_int32_t added;
2859
2860                 csa = &start_ccb->csa;
2861                 added = csa->event_enable;
2862                 async_head = &path->device->asyncs;
2863
2864                 /*
2865                  * If there is already an entry for us, simply
2866                  * update it.
2867                  */
2868                 cur_entry = SLIST_FIRST(async_head);
2869                 while (cur_entry != NULL) {
2870                         if ((cur_entry->callback_arg == csa->callback_arg)
2871                          && (cur_entry->callback == csa->callback))
2872                                 break;
2873                         cur_entry = SLIST_NEXT(cur_entry, links);
2874                 }
2875
2876                 if (cur_entry != NULL) {
2877                         /*
2878                          * If the request has no flags set,
2879                          * remove the entry.
2880                          */
2881                         added &= ~cur_entry->event_enable;
2882                         if (csa->event_enable == 0) {
2883                                 SLIST_REMOVE(async_head, cur_entry,
2884                                              async_node, links);
2885                                 xpt_release_device(path->device);
2886                                 free(cur_entry, M_CAMXPT);
2887                         } else {
2888                                 cur_entry->event_enable = csa->event_enable;
2889                         }
2890                         csa->event_enable = added;
2891                 } else {
2892                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2893                                            M_NOWAIT);
2894                         if (cur_entry == NULL) {
2895                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2896                                 break;
2897                         }
2898                         cur_entry->event_enable = csa->event_enable;
2899                         cur_entry->event_lock =
2900                             mtx_owned(path->bus->sim->mtx) ? 1 : 0;
2901                         cur_entry->callback_arg = csa->callback_arg;
2902                         cur_entry->callback = csa->callback;
2903                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
2904                         xpt_acquire_device(path->device);
2905                 }
2906                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2907                 break;
2908         }
2909         case XPT_REL_SIMQ:
2910         {
2911                 struct ccb_relsim *crs;
2912                 struct cam_ed *dev;
2913
2914                 crs = &start_ccb->crs;
2915                 dev = path->device;
2916                 if (dev == NULL) {
2917
2918                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
2919                         break;
2920                 }
2921
2922                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
2923
2924                         /* Don't ever go below one opening */
2925                         if (crs->openings > 0) {
2926                                 xpt_dev_ccbq_resize(path, crs->openings);
2927                                 if (bootverbose) {
2928                                         xpt_print(path,
2929                                             "number of openings is now %d\n",
2930                                             crs->openings);
2931                                 }
2932                         }
2933                 }
2934
2935                 mtx_lock(&dev->sim->devq->send_mtx);
2936                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
2937
2938                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
2939
2940                                 /*
2941                                  * Just extend the old timeout and decrement
2942                                  * the freeze count so that a single timeout
2943                                  * is sufficient for releasing the queue.
2944                                  */
2945                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2946                                 callout_stop(&dev->callout);
2947                         } else {
2948
2949                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2950                         }
2951
2952                         callout_reset_sbt(&dev->callout,
2953                             SBT_1MS * crs->release_timeout, 0,
2954                             xpt_release_devq_timeout, dev, 0);
2955
2956                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
2957
2958                 }
2959
2960                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
2961
2962                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
2963                                 /*
2964                                  * Decrement the freeze count so that a single
2965                                  * completion is still sufficient to unfreeze
2966                                  * the queue.
2967                                  */
2968                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2969                         } else {
2970
2971                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
2972                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2973                         }
2974                 }
2975
2976                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
2977
2978                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
2979                          || (dev->ccbq.dev_active == 0)) {
2980
2981                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2982                         } else {
2983
2984                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
2985                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2986                         }
2987                 }
2988                 mtx_unlock(&dev->sim->devq->send_mtx);
2989
2990                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
2991                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
2992                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
2993                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2994                 break;
2995         }
2996         case XPT_DEBUG: {
2997                 struct cam_path *oldpath;
2998
2999                 /* Check that all request bits are supported. */
3000                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3001                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3002                         break;
3003                 }
3004
3005                 cam_dflags = CAM_DEBUG_NONE;
3006                 if (cam_dpath != NULL) {
3007                         oldpath = cam_dpath;
3008                         cam_dpath = NULL;
3009                         xpt_free_path(oldpath);
3010                 }
3011                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3012                         if (xpt_create_path(&cam_dpath, NULL,
3013                                             start_ccb->ccb_h.path_id,
3014                                             start_ccb->ccb_h.target_id,
3015                                             start_ccb->ccb_h.target_lun) !=
3016                                             CAM_REQ_CMP) {
3017                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3018                         } else {
3019                                 cam_dflags = start_ccb->cdbg.flags;
3020                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3021                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3022                                     cam_dflags);
3023                         }
3024                 } else
3025                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3026                 break;
3027         }
3028         case XPT_NOOP:
3029                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3030                         xpt_freeze_devq(path, 1);
3031                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3032                 break;
3033         case XPT_REPROBE_LUN:
3034                 xpt_async(AC_INQ_CHANGED, path, NULL);
3035                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3036                 xpt_done(start_ccb);
3037                 break;
3038         default:
3039         case XPT_SDEV_TYPE:
3040         case XPT_TERM_IO:
3041         case XPT_ENG_INQ:
3042                 /* XXX Implement */
3043                 xpt_print_path(start_ccb->ccb_h.path);
3044                 printf("%s: CCB type %#x %s not supported\n", __func__,
3045                     start_ccb->ccb_h.func_code,
3046                     xpt_action_name(start_ccb->ccb_h.func_code));
3047                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3048                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3049                         xpt_done(start_ccb);
3050                 }
3051                 break;
3052         }
3053         CAM_DEBUG(path, CAM_DEBUG_TRACE,
3054             ("xpt_action_default: func= %#x %s status %#x\n",
3055                 start_ccb->ccb_h.func_code,
3056                 xpt_action_name(start_ccb->ccb_h.func_code),
3057                 start_ccb->ccb_h.status));
3058 }
3059
3060 void
3061 xpt_polled_action(union ccb *start_ccb)
3062 {
3063         u_int32_t timeout;
3064         struct    cam_sim *sim;
3065         struct    cam_devq *devq;
3066         struct    cam_ed *dev;
3067
3068         timeout = start_ccb->ccb_h.timeout * 10;
3069         sim = start_ccb->ccb_h.path->bus->sim;
3070         devq = sim->devq;
3071         dev = start_ccb->ccb_h.path->device;
3072
3073         mtx_unlock(&dev->device_mtx);
3074
3075         /*
3076          * Steal an opening so that no other queued requests
3077          * can get it before us while we simulate interrupts.
3078          */
3079         mtx_lock(&devq->send_mtx);
3080         dev->ccbq.dev_openings--;
3081         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) &&
3082             (--timeout > 0)) {
3083                 mtx_unlock(&devq->send_mtx);
3084                 DELAY(100);
3085                 CAM_SIM_LOCK(sim);
3086                 (*(sim->sim_poll))(sim);
3087                 CAM_SIM_UNLOCK(sim);
3088                 camisr_runqueue();
3089                 mtx_lock(&devq->send_mtx);
3090         }
3091         dev->ccbq.dev_openings++;
3092         mtx_unlock(&devq->send_mtx);
3093
3094         if (timeout != 0) {
3095                 xpt_action(start_ccb);
3096                 while(--timeout > 0) {
3097                         CAM_SIM_LOCK(sim);
3098                         (*(sim->sim_poll))(sim);
3099                         CAM_SIM_UNLOCK(sim);
3100                         camisr_runqueue();
3101                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3102                             != CAM_REQ_INPROG)
3103                                 break;
3104                         DELAY(100);
3105                 }
3106                 if (timeout == 0) {
3107                         /*
3108                          * XXX Is it worth adding a sim_timeout entry
3109                          * point so we can attempt recovery?  If
3110                          * this is only used for dumps, I don't think
3111                          * it is.
3112                          */
3113                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3114                 }
3115         } else {
3116                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3117         }
3118
3119         mtx_lock(&dev->device_mtx);
3120 }
3121
3122 /*
3123  * Schedule a peripheral driver to receive a ccb when its
3124  * target device has space for more transactions.
3125  */
3126 void
3127 xpt_schedule(struct cam_periph *periph, u_int32_t new_priority)
3128 {
3129
3130         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3131         cam_periph_assert(periph, MA_OWNED);
3132         if (new_priority < periph->scheduled_priority) {
3133                 periph->scheduled_priority = new_priority;
3134                 xpt_run_allocq(periph, 0);
3135         }
3136 }
3137
3138
3139 /*
3140  * Schedule a device to run on a given queue.
3141  * If the device was inserted as a new entry on the queue,
3142  * return 1 meaning the device queue should be run. If we
3143  * were already queued, implying someone else has already
3144  * started the queue, return 0 so the caller doesn't attempt
3145  * to run the queue.
3146  */
3147 static int
3148 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3149                  u_int32_t new_priority)
3150 {
3151         int retval;
3152         u_int32_t old_priority;
3153
3154         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3155
3156         old_priority = pinfo->priority;
3157
3158         /*
3159          * Are we already queued?
3160          */
3161         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3162                 /* Simply reorder based on new priority */
3163                 if (new_priority < old_priority) {
3164                         camq_change_priority(queue, pinfo->index,
3165                                              new_priority);
3166                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3167                                         ("changed priority to %d\n",
3168                                          new_priority));
3169                         retval = 1;
3170                 } else
3171                         retval = 0;
3172         } else {
3173                 /* New entry on the queue */
3174                 if (new_priority < old_priority)
3175                         pinfo->priority = new_priority;
3176
3177                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3178                                 ("Inserting onto queue\n"));
3179                 pinfo->generation = ++queue->generation;
3180                 camq_insert(queue, pinfo);
3181                 retval = 1;
3182         }
3183         return (retval);
3184 }
3185
3186 static void
3187 xpt_run_allocq_task(void *context, int pending)
3188 {
3189         struct cam_periph *periph = context;
3190
3191         cam_periph_lock(periph);
3192         periph->flags &= ~CAM_PERIPH_RUN_TASK;
3193         xpt_run_allocq(periph, 1);
3194         cam_periph_unlock(periph);
3195         cam_periph_release(periph);
3196 }
3197
3198 static void
3199 xpt_run_allocq(struct cam_periph *periph, int sleep)
3200 {
3201         struct cam_ed   *device;
3202         union ccb       *ccb;
3203         uint32_t         prio;
3204
3205         cam_periph_assert(periph, MA_OWNED);
3206         if (periph->periph_allocating)
3207                 return;
3208         periph->periph_allocating = 1;
3209         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_allocq(%p)\n", periph));
3210         device = periph->path->device;
3211         ccb = NULL;
3212 restart:
3213         while ((prio = min(periph->scheduled_priority,
3214             periph->immediate_priority)) != CAM_PRIORITY_NONE &&
3215             (periph->periph_allocated - (ccb != NULL ? 1 : 0) <
3216              device->ccbq.total_openings || prio <= CAM_PRIORITY_OOB)) {
3217
3218                 if (ccb == NULL &&
3219                     (ccb = xpt_get_ccb_nowait(periph)) == NULL) {
3220                         if (sleep) {
3221                                 ccb = xpt_get_ccb(periph);
3222                                 goto restart;
3223                         }
3224                         if (periph->flags & CAM_PERIPH_RUN_TASK)
3225                                 break;
3226                         cam_periph_doacquire(periph);
3227                         periph->flags |= CAM_PERIPH_RUN_TASK;
3228                         taskqueue_enqueue(xsoftc.xpt_taskq,
3229                             &periph->periph_run_task);
3230                         break;
3231                 }
3232                 xpt_setup_ccb(&ccb->ccb_h, periph->path, prio);
3233                 if (prio == periph->immediate_priority) {
3234                         periph->immediate_priority = CAM_PRIORITY_NONE;
3235                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3236                                         ("waking cam_periph_getccb()\n"));
3237                         SLIST_INSERT_HEAD(&periph->ccb_list, &ccb->ccb_h,
3238                                           periph_links.sle);
3239                         wakeup(&periph->ccb_list);
3240                 } else {
3241                         periph->scheduled_priority = CAM_PRIORITY_NONE;
3242                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3243                                         ("calling periph_start()\n"));
3244                         periph->periph_start(periph, ccb);
3245                 }
3246                 ccb = NULL;
3247         }
3248         if (ccb != NULL)
3249                 xpt_release_ccb(ccb);
3250         periph->periph_allocating = 0;
3251 }
3252
3253 static void
3254 xpt_run_devq(struct cam_devq *devq)
3255 {
3256         int lock;
3257
3258         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3259
3260         devq->send_queue.qfrozen_cnt++;
3261         while ((devq->send_queue.entries > 0)
3262             && (devq->send_openings > 0)
3263             && (devq->send_queue.qfrozen_cnt <= 1)) {
3264                 struct  cam_ed *device;
3265                 union ccb *work_ccb;
3266                 struct  cam_sim *sim;
3267                 struct xpt_proto *proto;
3268
3269                 device = (struct cam_ed *)camq_remove(&devq->send_queue,
3270                                                            CAMQ_HEAD);
3271                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3272                                 ("running device %p\n", device));
3273
3274                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3275                 if (work_ccb == NULL) {
3276                         printf("device on run queue with no ccbs???\n");
3277                         continue;
3278                 }
3279
3280                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3281
3282                         mtx_lock(&xsoftc.xpt_highpower_lock);
3283                         if (xsoftc.num_highpower <= 0) {
3284                                 /*
3285                                  * We got a high power command, but we
3286                                  * don't have any available slots.  Freeze
3287                                  * the device queue until we have a slot
3288                                  * available.
3289                                  */
3290                                 xpt_freeze_devq_device(device, 1);
3291                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, device,
3292                                                    highpowerq_entry);
3293
3294                                 mtx_unlock(&xsoftc.xpt_highpower_lock);
3295                                 continue;
3296                         } else {
3297                                 /*
3298                                  * Consume a high power slot while
3299                                  * this ccb runs.
3300                                  */
3301                                 xsoftc.num_highpower--;
3302                         }
3303                         mtx_unlock(&xsoftc.xpt_highpower_lock);
3304                 }
3305                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3306                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3307                 devq->send_openings--;
3308                 devq->send_active++;
3309                 xpt_schedule_devq(devq, device);
3310                 mtx_unlock(&devq->send_mtx);
3311
3312                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3313                         /*
3314                          * The client wants to freeze the queue
3315                          * after this CCB is sent.
3316                          */
3317                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3318                 }
3319
3320                 /* In Target mode, the peripheral driver knows best... */
3321                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3322                         if ((device->inq_flags & SID_CmdQue) != 0
3323                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3324                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3325                         else
3326                                 /*
3327                                  * Clear this in case of a retried CCB that
3328                                  * failed due to a rejected tag.
3329                                  */
3330                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3331                 }
3332
3333                 KASSERT(device == work_ccb->ccb_h.path->device,
3334                     ("device (%p) / path->device (%p) mismatch",
3335                         device, work_ccb->ccb_h.path->device));
3336                 proto = xpt_proto_find(device->protocol);
3337                 if (proto && proto->ops->debug_out)
3338                         proto->ops->debug_out(work_ccb);
3339
3340                 /*
3341                  * Device queues can be shared among multiple SIM instances
3342                  * that reside on different busses.  Use the SIM from the
3343                  * queued device, rather than the one from the calling bus.
3344                  */
3345                 sim = device->sim;
3346                 lock = (mtx_owned(sim->mtx) == 0);
3347                 if (lock)
3348                         CAM_SIM_LOCK(sim);
3349                 work_ccb->ccb_h.qos.sim_data = sbinuptime(); // xxx uintprt_t too small 32bit platforms
3350                 (*(sim->sim_action))(sim, work_ccb);
3351                 if (lock)
3352                         CAM_SIM_UNLOCK(sim);
3353                 mtx_lock(&devq->send_mtx);
3354         }
3355         devq->send_queue.qfrozen_cnt--;
3356 }
3357
3358 /*
3359  * This function merges stuff from the slave ccb into the master ccb, while
3360  * keeping important fields in the master ccb constant.
3361  */
3362 void
3363 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3364 {
3365
3366         /*
3367          * Pull fields that are valid for peripheral drivers to set
3368          * into the master CCB along with the CCB "payload".
3369          */
3370         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3371         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3372         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3373         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3374         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3375               sizeof(union ccb) - sizeof(struct ccb_hdr));
3376 }
3377
3378 void
3379 xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, struct cam_path *path,
3380                     u_int32_t priority, u_int32_t flags)
3381 {
3382
3383         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3384         ccb_h->pinfo.priority = priority;
3385         ccb_h->path = path;
3386         ccb_h->path_id = path->bus->path_id;
3387         if (path->target)
3388                 ccb_h->target_id = path->target->target_id;
3389         else
3390                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3391         if (path->device) {
3392                 ccb_h->target_lun = path->device->lun_id;
3393                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3394         } else {
3395                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3396         }
3397         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3398         ccb_h->flags = flags;
3399         ccb_h->xflags = 0;
3400 }
3401
3402 void
3403 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3404 {
3405         xpt_setup_ccb_flags(ccb_h, path, priority, /*flags*/ 0);
3406 }
3407
3408 /* Path manipulation functions */
3409 cam_status
3410 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3411                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3412 {
3413         struct     cam_path *path;
3414         cam_status status;
3415
3416         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3417
3418         if (path == NULL) {
3419                 status = CAM_RESRC_UNAVAIL;
3420                 return(status);
3421         }
3422         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3423         if (status != CAM_REQ_CMP) {
3424                 free(path, M_CAMPATH);
3425                 path = NULL;
3426         }
3427         *new_path_ptr = path;
3428         return (status);
3429 }
3430
3431 cam_status
3432 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3433                          struct cam_periph *periph, path_id_t path_id,
3434                          target_id_t target_id, lun_id_t lun_id)
3435 {
3436
3437         return (xpt_create_path(new_path_ptr, periph, path_id, target_id,
3438             lun_id));
3439 }
3440
3441 cam_status
3442 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3443                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3444 {
3445         struct       cam_eb *bus;
3446         struct       cam_et *target;
3447         struct       cam_ed *device;
3448         cam_status   status;
3449
3450         status = CAM_REQ_CMP;   /* Completed without error */
3451         target = NULL;          /* Wildcarded */
3452         device = NULL;          /* Wildcarded */
3453
3454         /*
3455          * We will potentially modify the EDT, so block interrupts
3456          * that may attempt to create cam paths.
3457          */
3458         bus = xpt_find_bus(path_id);
3459         if (bus == NULL) {
3460                 status = CAM_PATH_INVALID;
3461         } else {
3462                 xpt_lock_buses();
3463                 mtx_lock(&bus->eb_mtx);
3464                 target = xpt_find_target(bus, target_id);
3465                 if (target == NULL) {
3466                         /* Create one */
3467                         struct cam_et *new_target;
3468
3469                         new_target = xpt_alloc_target(bus, target_id);
3470                         if (new_target == NULL) {
3471                                 status = CAM_RESRC_UNAVAIL;
3472                         } else {
3473                                 target = new_target;
3474                         }
3475                 }
3476                 xpt_unlock_buses();
3477                 if (target != NULL) {
3478                         device = xpt_find_device(target, lun_id);
3479                         if (device == NULL) {
3480                                 /* Create one */
3481                                 struct cam_ed *new_device;
3482
3483                                 new_device =
3484                                     (*(bus->xport->ops->alloc_device))(bus,
3485                                                                        target,
3486                                                                        lun_id);
3487                                 if (new_device == NULL) {
3488                                         status = CAM_RESRC_UNAVAIL;
3489                                 } else {
3490                                         device = new_device;
3491                                 }
3492                         }
3493                 }
3494                 mtx_unlock(&bus->eb_mtx);
3495         }
3496
3497         /*
3498          * Only touch the user's data if we are successful.
3499          */
3500         if (status == CAM_REQ_CMP) {
3501                 new_path->periph = perph;
3502                 new_path->bus = bus;
3503                 new_path->target = target;
3504                 new_path->device = device;
3505                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3506         } else {
3507                 if (device != NULL)
3508                         xpt_release_device(device);
3509                 if (target != NULL)
3510                         xpt_release_target(target);
3511                 if (bus != NULL)
3512                         xpt_release_bus(bus);
3513         }
3514         return (status);
3515 }
3516
3517 cam_status
3518 xpt_clone_path(struct cam_path **new_path_ptr, struct cam_path *path)
3519 {
3520         struct     cam_path *new_path;
3521
3522         new_path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3523         if (new_path == NULL)
3524                 return(CAM_RESRC_UNAVAIL);
3525         xpt_copy_path(new_path, path);
3526         *new_path_ptr = new_path;
3527         return (CAM_REQ_CMP);
3528 }
3529
3530 void
3531 xpt_copy_path(struct cam_path *new_path, struct cam_path *path)
3532 {
3533
3534         *new_path = *path;
3535         if (path->bus != NULL)
3536                 xpt_acquire_bus(path->bus);
3537         if (path->target != NULL)
3538                 xpt_acquire_target(path->target);
3539         if (path->device != NULL)
3540                 xpt_acquire_device(path->device);
3541 }
3542
3543 void
3544 xpt_release_path(struct cam_path *path)
3545 {
3546         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3547         if (path->device != NULL) {
3548                 xpt_release_device(path->device);
3549                 path->device = NULL;
3550         }
3551         if (path->target != NULL) {
3552                 xpt_release_target(path->target);
3553                 path->target = NULL;
3554         }
3555         if (path->bus != NULL) {
3556                 xpt_release_bus(path->bus);
3557                 path->bus = NULL;
3558         }
3559 }
3560
3561 void
3562 xpt_free_path(struct cam_path *path)
3563 {
3564
3565         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3566         xpt_release_path(path);
3567         free(path, M_CAMPATH);
3568 }
3569
3570 void
3571 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3572     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3573 {
3574
3575         xpt_lock_buses();
3576         if (bus_ref) {
3577                 if (path->bus)
3578                         *bus_ref = path->bus->refcount;
3579                 else
3580                         *bus_ref = 0;
3581         }
3582         if (periph_ref) {
3583                 if (path->periph)
3584                         *periph_ref = path->periph->refcount;
3585                 else
3586                         *periph_ref = 0;
3587         }
3588         xpt_unlock_buses();
3589         if (target_ref) {
3590                 if (path->target)
3591                         *target_ref = path->target->refcount;
3592                 else
3593                         *target_ref = 0;
3594         }
3595         if (device_ref) {
3596                 if (path->device)
3597                         *device_ref = path->device->refcount;
3598                 else
3599                         *device_ref = 0;
3600         }
3601 }
3602
3603 /*
3604  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3605  * in path1, 2 for match with wildcards in path2.
3606  */
3607 int
3608 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3609 {
3610         int retval = 0;
3611
3612         if (path1->bus != path2->bus) {
3613                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3614                         retval = 1;
3615                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3616                         retval = 2;
3617                 else
3618                         return (-1);
3619         }
3620         if (path1->target != path2->target) {
3621                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3622                         if (retval == 0)
3623                                 retval = 1;
3624                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3625                         retval = 2;
3626                 else
3627                         return (-1);
3628         }
3629         if (path1->device != path2->device) {
3630                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3631                         if (retval == 0)
3632                                 retval = 1;
3633                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3634                         retval = 2;
3635                 else
3636                         return (-1);
3637         }
3638         return (retval);
3639 }
3640
3641 int
3642 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3643 {
3644         int retval = 0;
3645
3646         if (path->bus != dev->target->bus) {
3647                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3648                         retval = 1;
3649                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3650                         retval = 2;
3651                 else
3652                         return (-1);
3653         }
3654         if (path->target != dev->target) {
3655                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3656                         if (retval == 0)
3657                                 retval = 1;
3658                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3659                         retval = 2;
3660                 else
3661                         return (-1);
3662         }
3663         if (path->device != dev) {
3664                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3665                         if (retval == 0)
3666                                 retval = 1;
3667                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3668                         retval = 2;
3669                 else
3670                         return (-1);
3671         }
3672         return (retval);
3673 }
3674
3675 void
3676 xpt_print_path(struct cam_path *path)
3677 {
3678
3679         if (path == NULL)
3680                 printf("(nopath): ");
3681         else {
3682                 if (path->periph != NULL)
3683                         printf("(%s%d:", path->periph->periph_name,
3684                                path->periph->unit_number);
3685                 else
3686                         printf("(noperiph:");
3687
3688                 if (path->bus != NULL)
3689                         printf("%s%d:%d:", path->bus->sim->sim_name,
3690                                path->bus->sim->unit_number,
3691                                path->bus->sim->bus_id);
3692                 else
3693                         printf("nobus:");
3694
3695                 if (path->target != NULL)
3696                         printf("%d:", path->target->target_id);
3697                 else
3698                         printf("X:");
3699
3700                 if (path->device != NULL)
3701                         printf("%jx): ", (uintmax_t)path->device->lun_id);
3702                 else
3703                         printf("X): ");
3704         }
3705 }
3706
3707 void
3708 xpt_print_device(struct cam_ed *device)
3709 {
3710
3711         if (device == NULL)
3712                 printf("(nopath): ");
3713         else {
3714                 printf("(noperiph:%s%d:%d:%d:%jx): ", device->sim->sim_name,
3715                        device->sim->unit_number,
3716                        device->sim->bus_id,
3717                        device->target->target_id,
3718                        (uintmax_t)device->lun_id);
3719         }
3720 }
3721
3722 void
3723 xpt_print(struct cam_path *path, const char *fmt, ...)
3724 {
3725         va_list ap;
3726         xpt_print_path(path);
3727         va_start(ap, fmt);
3728         vprintf(fmt, ap);
3729         va_end(ap);
3730 }
3731
3732 int
3733 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3734 {
3735         struct sbuf sb;
3736
3737         sbuf_new(&sb, str, str_len, 0);
3738
3739         if (path == NULL)
3740                 sbuf_printf(&sb, "(nopath): ");
3741         else {
3742                 if (path->periph != NULL)
3743                         sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
3744                                     path->periph->unit_number);
3745                 else
3746                         sbuf_printf(&sb, "(noperiph:");
3747
3748                 if (path->bus != NULL)
3749                         sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
3750                                     path->bus->sim->unit_number,
3751                                     path->bus->sim->bus_id);
3752                 else
3753                         sbuf_printf(&sb, "nobus:");
3754
3755                 if (path->target != NULL)
3756                         sbuf_printf(&sb, "%d:", path->target->target_id);
3757                 else
3758                         sbuf_printf(&sb, "X:");
3759
3760                 if (path->device != NULL)
3761                         sbuf_printf(&sb, "%jx): ",
3762                             (uintmax_t)path->device->lun_id);
3763                 else
3764                         sbuf_printf(&sb, "X): ");
3765         }
3766         sbuf_finish(&sb);
3767
3768         return(sbuf_len(&sb));
3769 }
3770
3771 path_id_t
3772 xpt_path_path_id(struct cam_path *path)
3773 {
3774         return(path->bus->path_id);
3775 }
3776
3777 target_id_t
3778 xpt_path_target_id(struct cam_path *path)
3779 {
3780         if (path->target != NULL)
3781                 return (path->target->target_id);
3782         else
3783                 return (CAM_TARGET_WILDCARD);
3784 }
3785
3786 lun_id_t
3787 xpt_path_lun_id(struct cam_path *path)
3788 {
3789         if (path->device != NULL)
3790                 return (path->device->lun_id);
3791         else
3792                 return (CAM_LUN_WILDCARD);
3793 }
3794
3795 struct cam_sim *
3796 xpt_path_sim(struct cam_path *path)
3797 {
3798
3799         return (path->bus->sim);
3800 }
3801
3802 struct cam_periph*
3803 xpt_path_periph(struct cam_path *path)
3804 {
3805
3806         return (path->periph);
3807 }
3808
3809 /*
3810  * Release a CAM control block for the caller.  Remit the cost of the structure
3811  * to the device referenced by the path.  If the this device had no 'credits'
3812  * and peripheral drivers have registered async callbacks for this notification
3813  * call them now.
3814  */
3815 void
3816 xpt_release_ccb(union ccb *free_ccb)
3817 {
3818         struct   cam_ed *device;
3819         struct   cam_periph *periph;
3820
3821         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3822         xpt_path_assert(free_ccb->ccb_h.path, MA_OWNED);
3823         device = free_ccb->ccb_h.path->device;
3824         periph = free_ccb->ccb_h.path->periph;
3825
3826         xpt_free_ccb(free_ccb);
3827         periph->periph_allocated--;
3828         cam_ccbq_release_opening(&device->ccbq);
3829         xpt_run_allocq(periph, 0);
3830 }
3831
3832 /* Functions accessed by SIM drivers */
3833
3834 static struct xpt_xport_ops xport_default_ops = {
3835         .alloc_device = xpt_alloc_device_default,
3836         .action = xpt_action_default,
3837         .async = xpt_dev_async_default,
3838 };
3839 static struct xpt_xport xport_default = {
3840         .xport = XPORT_UNKNOWN,
3841         .name = "unknown",
3842         .ops = &xport_default_ops,
3843 };
3844
3845 CAM_XPT_XPORT(xport_default);
3846
3847 /*
3848  * A sim structure, listing the SIM entry points and instance
3849  * identification info is passed to xpt_bus_register to hook the SIM
3850  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
3851  * for this new bus and places it in the array of busses and assigns
3852  * it a path_id.  The path_id may be influenced by "hard wiring"
3853  * information specified by the user.  Once interrupt services are
3854  * available, the bus will be probed.
3855  */
3856 int32_t
3857 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
3858 {
3859         struct cam_eb *new_bus;
3860         struct cam_eb *old_bus;
3861         struct ccb_pathinq cpi;
3862         struct cam_path *path;
3863         cam_status status;
3864
3865         mtx_assert(sim->mtx, MA_OWNED);
3866
3867         sim->bus_id = bus;
3868         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3869                                           M_CAMXPT, M_NOWAIT|M_ZERO);
3870         if (new_bus == NULL) {
3871                 /* Couldn't satisfy request */
3872                 return (CAM_RESRC_UNAVAIL);
3873         }
3874
3875         mtx_init(&new_bus->eb_mtx, "CAM bus lock", NULL, MTX_DEF);
3876         TAILQ_INIT(&new_bus->et_entries);
3877         cam_sim_hold(sim);
3878         new_bus->sim = sim;
3879         timevalclear(&new_bus->last_reset);
3880         new_bus->flags = 0;
3881         new_bus->refcount = 1;  /* Held until a bus_deregister event */
3882         new_bus->generation = 0;
3883
3884         xpt_lock_buses();
3885         sim->path_id = new_bus->path_id =
3886             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3887         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3888         while (old_bus != NULL
3889             && old_bus->path_id < new_bus->path_id)
3890                 old_bus = TAILQ_NEXT(old_bus, links);
3891         if (old_bus != NULL)
3892                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3893         else
3894                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
3895         xsoftc.bus_generation++;
3896         xpt_unlock_buses();
3897
3898         /*
3899          * Set a default transport so that a PATH_INQ can be issued to
3900          * the SIM.  This will then allow for probing and attaching of
3901          * a more appropriate transport.
3902          */
3903         new_bus->xport = &xport_default;
3904
3905         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
3906                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3907         if (status != CAM_REQ_CMP) {
3908                 xpt_release_bus(new_bus);
3909                 free(path, M_CAMXPT);
3910                 return (CAM_RESRC_UNAVAIL);
3911         }
3912
3913         xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3914         cpi.ccb_h.func_code = XPT_PATH_INQ;
3915         xpt_action((union ccb *)&cpi);
3916
3917         if (cpi.ccb_h.status == CAM_REQ_CMP) {
3918                 struct xpt_xport **xpt;
3919
3920                 SET_FOREACH(xpt, cam_xpt_xport_set) {
3921                         if ((*xpt)->xport == cpi.transport) {
3922                                 new_bus->xport = *xpt;
3923                                 break;
3924                         }
3925                 }
3926                 if (new_bus->xport == NULL) {
3927                         xpt_print_path(path);
3928                         printf("No transport found for %d\n", cpi.transport);
3929                         xpt_release_bus(new_bus);
3930                         free(path, M_CAMXPT);
3931                         return (CAM_RESRC_UNAVAIL);
3932                 }
3933         }
3934
3935         /* Notify interested parties */
3936         if (sim->path_id != CAM_XPT_PATH_ID) {
3937
3938                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
3939                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
3940                         union   ccb *scan_ccb;
3941
3942                         /* Initiate bus rescan. */
3943                         scan_ccb = xpt_alloc_ccb_nowait();
3944                         if (scan_ccb != NULL) {
3945                                 scan_ccb->ccb_h.path = path;
3946                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
3947                                 scan_ccb->crcn.flags = 0;
3948                                 xpt_rescan(scan_ccb);
3949                         } else {
3950                                 xpt_print(path,
3951                                           "Can't allocate CCB to scan bus\n");
3952                                 xpt_free_path(path);
3953                         }
3954                 } else
3955                         xpt_free_path(path);
3956         } else
3957                 xpt_free_path(path);
3958         return (CAM_SUCCESS);
3959 }
3960
3961 int32_t
3962 xpt_bus_deregister(path_id_t pathid)
3963 {
3964         struct cam_path bus_path;
3965         cam_status status;
3966
3967         status = xpt_compile_path(&bus_path, NULL, pathid,
3968                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3969         if (status != CAM_REQ_CMP)
3970                 return (status);
3971
3972         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
3973         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
3974
3975         /* Release the reference count held while registered. */
3976         xpt_release_bus(bus_path.bus);
3977         xpt_release_path(&bus_path);
3978
3979         return (CAM_REQ_CMP);
3980 }
3981
3982 static path_id_t
3983 xptnextfreepathid(void)
3984 {
3985         struct cam_eb *bus;
3986         path_id_t pathid;
3987         const char *strval;
3988
3989         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
3990         pathid = 0;
3991         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3992 retry:
3993         /* Find an unoccupied pathid */
3994         while (bus != NULL && bus->path_id <= pathid) {
3995                 if (bus->path_id == pathid)
3996                         pathid++;
3997                 bus = TAILQ_NEXT(bus, links);
3998         }
3999
4000         /*
4001          * Ensure that this pathid is not reserved for
4002          * a bus that may be registered in the future.
4003          */
4004         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4005                 ++pathid;
4006                 /* Start the search over */
4007                 goto retry;
4008         }
4009         return (pathid);
4010 }
4011
4012 static path_id_t
4013 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4014 {
4015         path_id_t pathid;
4016         int i, dunit, val;
4017         char buf[32];
4018         const char *dname;
4019
4020         pathid = CAM_XPT_PATH_ID;
4021         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4022         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4023                 return (pathid);
4024         i = 0;
4025         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4026                 if (strcmp(dname, "scbus")) {
4027                         /* Avoid a bit of foot shooting. */
4028                         continue;
4029                 }
4030                 if (dunit < 0)          /* unwired?! */
4031                         continue;
4032                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4033                         if (sim_bus == val) {
4034                                 pathid = dunit;
4035                                 break;
4036                         }
4037                 } else if (sim_bus == 0) {
4038                         /* Unspecified matches bus 0 */
4039                         pathid = dunit;
4040                         break;
4041                 } else {
4042                         printf("Ambiguous scbus configuration for %s%d "
4043                                "bus %d, cannot wire down.  The kernel "
4044                                "config entry for scbus%d should "
4045                                "specify a controller bus.\n"
4046                                "Scbus will be assigned dynamically.\n",
4047                                sim_name, sim_unit, sim_bus, dunit);
4048                         break;
4049                 }
4050         }
4051
4052         if (pathid == CAM_XPT_PATH_ID)
4053                 pathid = xptnextfreepathid();
4054         return (pathid);
4055 }
4056
4057 static const char *
4058 xpt_async_string(u_int32_t async_code)
4059 {
4060
4061         switch (async_code) {
4062         case AC_BUS_RESET: return ("AC_BUS_RESET");
4063         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4064         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4065         case AC_SENT_BDR: return ("AC_SENT_BDR");
4066         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4067         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4068         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4069         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4070         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4071         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4072         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4073         case AC_CONTRACT: return ("AC_CONTRACT");
4074         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4075         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4076         }
4077         return ("AC_UNKNOWN");
4078 }
4079
4080 static int
4081 xpt_async_size(u_int32_t async_code)
4082 {
4083
4084         switch (async_code) {
4085         case AC_BUS_RESET: return (0);
4086         case AC_UNSOL_RESEL: return (0);
4087         case AC_SCSI_AEN: return (0);
4088         case AC_SENT_BDR: return (0);
4089         case AC_PATH_REGISTERED: return (sizeof(struct ccb_pathinq));
4090         case AC_PATH_DEREGISTERED: return (0);
4091         case AC_FOUND_DEVICE: return (sizeof(struct ccb_getdev));
4092         case AC_LOST_DEVICE: return (0);
4093         case AC_TRANSFER_NEG: return (sizeof(struct ccb_trans_settings));
4094         case AC_INQ_CHANGED: return (0);
4095         case AC_GETDEV_CHANGED: return (0);
4096         case AC_CONTRACT: return (sizeof(struct ac_contract));
4097         case AC_ADVINFO_CHANGED: return (-1);
4098         case AC_UNIT_ATTENTION: return (sizeof(struct ccb_scsiio));
4099         }
4100         return (0);
4101 }
4102
4103 static int
4104 xpt_async_process_dev(struct cam_ed *device, void *arg)
4105 {
4106         union ccb *ccb = arg;
4107         struct cam_path *path = ccb->ccb_h.path;
4108         void *async_arg = ccb->casync.async_arg_ptr;
4109         u_int32_t async_code = ccb->casync.async_code;
4110         int relock;
4111
4112         if (path->device != device
4113          && path->device->lun_id != CAM_LUN_WILDCARD
4114          && device->lun_id != CAM_LUN_WILDCARD)
4115                 return (1);
4116
4117         /*
4118          * The async callback could free the device.
4119          * If it is a broadcast async, it doesn't hold
4120          * device reference, so take our own reference.
4121          */
4122         xpt_acquire_device(device);
4123
4124         /*
4125          * If async for specific device is to be delivered to
4126          * the wildcard client, take the specific device lock.
4127          * XXX: We may need a way for client to specify it.
4128          */
4129         if ((device->lun_id == CAM_LUN_WILDCARD &&
4130              path->device->lun_id != CAM_LUN_WILDCARD) ||
4131             (device->target->target_id == CAM_TARGET_WILDCARD &&
4132              path->target->target_id != CAM_TARGET_WILDCARD) ||
4133             (device->target->bus->path_id == CAM_BUS_WILDCARD &&
4134              path->target->bus->path_id != CAM_BUS_WILDCARD)) {
4135                 mtx_unlock(&device->device_mtx);
4136                 xpt_path_lock(path);
4137                 relock = 1;
4138         } else
4139                 relock = 0;
4140
4141         (*(device->target->bus->xport->ops->async))(async_code,
4142             device->target->bus, device->target, device, async_arg);
4143         xpt_async_bcast(&device->asyncs, async_code, path, async_arg);
4144
4145         if (relock) {
4146                 xpt_path_unlock(path);
4147                 mtx_lock(&device->device_mtx);
4148         }
4149         xpt_release_device(device);
4150         return (1);
4151 }
4152
4153 static int
4154 xpt_async_process_tgt(struct cam_et *target, void *arg)
4155 {
4156         union ccb *ccb = arg;
4157         struct cam_path *path = ccb->ccb_h.path;
4158
4159         if (path->target != target
4160          && path->target->target_id != CAM_TARGET_WILDCARD
4161          && target->target_id != CAM_TARGET_WILDCARD)
4162                 return (1);
4163
4164         if (ccb->casync.async_code == AC_SENT_BDR) {
4165                 /* Update our notion of when the last reset occurred */
4166                 microtime(&target->last_reset);
4167         }
4168
4169         return (xptdevicetraverse(target, NULL, xpt_async_process_dev, ccb));
4170 }
4171
4172 static void
4173 xpt_async_process(struct cam_periph *periph, union ccb *ccb)
4174 {
4175         struct cam_eb *bus;
4176         struct cam_path *path;
4177         void *async_arg;
4178         u_int32_t async_code;
4179
4180         path = ccb->ccb_h.path;
4181         async_code = ccb->casync.async_code;
4182         async_arg = ccb->casync.async_arg_ptr;
4183         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4184             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4185         bus = path->bus;
4186
4187         if (async_code == AC_BUS_RESET) {
4188                 /* Update our notion of when the last reset occurred */
4189                 microtime(&bus->last_reset);
4190         }
4191
4192         xpttargettraverse(bus, NULL, xpt_async_process_tgt, ccb);
4193
4194         /*
4195          * If this wasn't a fully wildcarded async, tell all
4196          * clients that want all async events.
4197          */
4198         if (bus != xpt_periph->path->bus) {
4199                 xpt_path_lock(xpt_periph->path);
4200                 xpt_async_process_dev(xpt_periph->path->device, ccb);
4201                 xpt_path_unlock(xpt_periph->path);
4202         }
4203
4204         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4205                 xpt_release_devq(path, 1, TRUE);
4206         else
4207                 xpt_release_simq(path->bus->sim, TRUE);
4208         if (ccb->casync.async_arg_size > 0)
4209                 free(async_arg, M_CAMXPT);
4210         xpt_free_path(path);
4211         xpt_free_ccb(ccb);
4212 }
4213
4214 static void
4215 xpt_async_bcast(struct async_list *async_head,
4216                 u_int32_t async_code,
4217                 struct cam_path *path, void *async_arg)
4218 {
4219         struct async_node *cur_entry;
4220         int lock;
4221
4222         cur_entry = SLIST_FIRST(async_head);
4223         while (cur_entry != NULL) {
4224                 struct async_node *next_entry;
4225                 /*
4226                  * Grab the next list entry before we call the current
4227                  * entry's callback.  This is because the callback function
4228                  * can delete its async callback entry.
4229                  */
4230                 next_entry = SLIST_NEXT(cur_entry, links);
4231                 if ((cur_entry->event_enable & async_code) != 0) {
4232                         lock = cur_entry->event_lock;
4233                         if (lock)
4234                                 CAM_SIM_LOCK(path->device->sim);
4235                         cur_entry->callback(cur_entry->callback_arg,
4236                                             async_code, path,
4237                                             async_arg);
4238                         if (lock)
4239                                 CAM_SIM_UNLOCK(path->device->sim);
4240                 }
4241                 cur_entry = next_entry;
4242         }
4243 }
4244
4245 void
4246 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4247 {
4248         union ccb *ccb;
4249         int size;
4250
4251         ccb = xpt_alloc_ccb_nowait();
4252         if (ccb == NULL) {
4253                 xpt_print(path, "Can't allocate CCB to send %s\n",
4254                     xpt_async_string(async_code));
4255                 return;
4256         }
4257
4258         if (xpt_clone_path(&ccb->ccb_h.path, path) != CAM_REQ_CMP) {
4259                 xpt_print(path, "Can't allocate path to send %s\n",
4260                     xpt_async_string(async_code));
4261                 xpt_free_ccb(ccb);
4262                 return;
4263         }
4264         ccb->ccb_h.path->periph = NULL;
4265         ccb->ccb_h.func_code = XPT_ASYNC;
4266         ccb->ccb_h.cbfcnp = xpt_async_process;
4267         ccb->ccb_h.flags |= CAM_UNLOCKED;
4268         ccb->casync.async_code = async_code;
4269         ccb->casync.async_arg_size = 0;
4270         size = xpt_async_size(async_code);
4271         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE,
4272             ("xpt_async: func %#x %s aync_code %d %s\n",
4273                 ccb->ccb_h.func_code,
4274                 xpt_action_name(ccb->ccb_h.func_code),
4275                 async_code,
4276                 xpt_async_string(async_code)));
4277         if (size > 0 && async_arg != NULL) {
4278                 ccb->casync.async_arg_ptr = malloc(size, M_CAMXPT, M_NOWAIT);
4279                 if (ccb->casync.async_arg_ptr == NULL) {
4280                         xpt_print(path, "Can't allocate argument to send %s\n",
4281                             xpt_async_string(async_code));
4282                         xpt_free_path(ccb->ccb_h.path);
4283                         xpt_free_ccb(ccb);
4284                         return;
4285                 }
4286                 memcpy(ccb->casync.async_arg_ptr, async_arg, size);
4287                 ccb->casync.async_arg_size = size;
4288         } else if (size < 0) {
4289                 ccb->casync.async_arg_ptr = async_arg;
4290                 ccb->casync.async_arg_size = size;
4291         }
4292         if (path->device != NULL && path->device->lun_id != CAM_LUN_WILDCARD)
4293                 xpt_freeze_devq(path, 1);
4294         else
4295                 xpt_freeze_simq(path->bus->sim, 1);
4296         xpt_done(ccb);
4297 }
4298
4299 static void
4300 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4301                       struct cam_et *target, struct cam_ed *device,
4302                       void *async_arg)
4303 {
4304
4305         /*
4306          * We only need to handle events for real devices.
4307          */
4308         if (target->target_id == CAM_TARGET_WILDCARD
4309          || device->lun_id == CAM_LUN_WILDCARD)
4310                 return;
4311
4312         printf("%s called\n", __func__);
4313 }
4314
4315 static uint32_t
4316 xpt_freeze_devq_device(struct cam_ed *dev, u_int count)
4317 {
4318         struct cam_devq *devq;
4319         uint32_t freeze;
4320
4321         devq = dev->sim->devq;
4322         mtx_assert(&devq->send_mtx, MA_OWNED);
4323         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4324             ("xpt_freeze_devq_device(%d) %u->%u\n", count,
4325             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4326         freeze = (dev->ccbq.queue.qfrozen_cnt += count);
4327         /* Remove frozen device from sendq. */
4328         if (device_is_queued(dev))
4329                 camq_remove(&devq->send_queue, dev->devq_entry.index);
4330         return (freeze);
4331 }
4332
4333 u_int32_t
4334 xpt_freeze_devq(struct cam_path *path, u_int count)
4335 {
4336         struct cam_ed   *dev = path->device;
4337         struct cam_devq *devq;
4338         uint32_t         freeze;
4339
4340         devq = dev->sim->devq;
4341         mtx_lock(&devq->send_mtx);
4342         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq(%d)\n", count));
4343         freeze = xpt_freeze_devq_device(dev, count);
4344         mtx_unlock(&devq->send_mtx);
4345         return (freeze);
4346 }
4347
4348 u_int32_t
4349 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4350 {
4351         struct cam_devq *devq;
4352         uint32_t         freeze;
4353
4354         devq = sim->devq;
4355         mtx_lock(&devq->send_mtx);
4356         freeze = (devq->send_queue.qfrozen_cnt += count);
4357         mtx_unlock(&devq->send_mtx);
4358         return (freeze);
4359 }
4360
4361 static void
4362 xpt_release_devq_timeout(void *arg)
4363 {
4364         struct cam_ed *dev;
4365         struct cam_devq *devq;
4366
4367         dev = (struct cam_ed *)arg;
4368         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4369         devq = dev->sim->devq;
4370         mtx_assert(&devq->send_mtx, MA_OWNED);
4371         if (xpt_release_devq_device(dev, /*count*/1, /*run_queue*/TRUE))
4372                 xpt_run_devq(devq);
4373 }
4374
4375 void
4376 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4377 {
4378         struct cam_ed *dev;
4379         struct cam_devq *devq;
4380
4381         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4382             count, run_queue));
4383         dev = path->device;
4384         devq = dev->sim->devq;
4385         mtx_lock(&devq->send_mtx);
4386         if (xpt_release_devq_device(dev, count, run_queue))
4387                 xpt_run_devq(dev->sim->devq);
4388         mtx_unlock(&devq->send_mtx);
4389 }
4390
4391 static int
4392 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4393 {
4394
4395         mtx_assert(&dev->sim->devq->send_mtx, MA_OWNED);
4396         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4397             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4398             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4399         if (count > dev->ccbq.queue.qfrozen_cnt) {
4400 #ifdef INVARIANTS
4401                 printf("xpt_release_devq(): requested %u > present %u\n",
4402                     count, dev->ccbq.queue.qfrozen_cnt);
4403 #endif
4404                 count = dev->ccbq.queue.qfrozen_cnt;
4405         }
4406         dev->ccbq.queue.qfrozen_cnt -= count;
4407         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4408                 /*
4409                  * No longer need to wait for a successful
4410                  * command completion.
4411                  */
4412                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4413                 /*
4414                  * Remove any timeouts that might be scheduled
4415                  * to release this queue.
4416                  */
4417                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4418                         callout_stop(&dev->callout);
4419                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4420                 }
4421                 /*
4422                  * Now that we are unfrozen schedule the
4423                  * device so any pending transactions are
4424                  * run.
4425                  */
4426                 xpt_schedule_devq(dev->sim->devq, dev);
4427         } else
4428                 run_queue = 0;
4429         return (run_queue);
4430 }
4431
4432 void
4433 xpt_release_simq(struct cam_sim *sim, int run_queue)
4434 {
4435         struct cam_devq *devq;
4436
4437         devq = sim->devq;
4438         mtx_lock(&devq->send_mtx);
4439         if (devq->send_queue.qfrozen_cnt <= 0) {
4440 #ifdef INVARIANTS
4441                 printf("xpt_release_simq: requested 1 > present %u\n",
4442                     devq->send_queue.qfrozen_cnt);
4443 #endif
4444         } else
4445                 devq->send_queue.qfrozen_cnt--;
4446         if (devq->send_queue.qfrozen_cnt == 0) {
4447                 /*
4448                  * If there is a timeout scheduled to release this
4449                  * sim queue, remove it.  The queue frozen count is
4450                  * already at 0.
4451                  */
4452                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4453                         callout_stop(&sim->callout);
4454                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4455                 }
4456                 if (run_queue) {
4457                         /*
4458                          * Now that we are unfrozen run the send queue.
4459                          */
4460                         xpt_run_devq(sim->devq);
4461                 }
4462         }
4463         mtx_unlock(&devq->send_mtx);
4464 }
4465
4466 /*
4467  * XXX Appears to be unused.
4468  */
4469 static void
4470 xpt_release_simq_timeout(void *arg)
4471 {
4472         struct cam_sim *sim;
4473
4474         sim = (struct cam_sim *)arg;
4475         xpt_release_simq(sim, /* run_queue */ TRUE);
4476 }
4477
4478 void
4479 xpt_done(union ccb *done_ccb)
4480 {
4481         struct cam_doneq *queue;
4482         int     run, hash;
4483
4484 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
4485         if (done_ccb->ccb_h.func_code == XPT_SCSI_IO &&
4486             done_ccb->csio.bio != NULL)
4487                 biotrack(done_ccb->csio.bio, __func__);
4488 #endif
4489
4490         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4491             ("xpt_done: func= %#x %s status %#x\n",
4492                 done_ccb->ccb_h.func_code,
4493                 xpt_action_name(done_ccb->ccb_h.func_code),
4494                 done_ccb->ccb_h.status));
4495         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4496                 return;
4497
4498         /* Store the time the ccb was in the sim */
4499         done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data;
4500         hash = (done_ccb->ccb_h.path_id + done_ccb->ccb_h.target_id +
4501             done_ccb->ccb_h.target_lun) % cam_num_doneqs;
4502         queue = &cam_doneqs[hash];
4503         mtx_lock(&queue->cam_doneq_mtx);
4504         run = (queue->cam_doneq_sleep && STAILQ_EMPTY(&queue->cam_doneq));
4505         STAILQ_INSERT_TAIL(&queue->cam_doneq, &done_ccb->ccb_h, sim_links.stqe);
4506         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4507         mtx_unlock(&queue->cam_doneq_mtx);
4508         if (run)
4509                 wakeup(&queue->cam_doneq);
4510 }
4511
4512 void
4513 xpt_done_direct(union ccb *done_ccb)
4514 {
4515
4516         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4517             ("xpt_done_direct: status %#x\n", done_ccb->ccb_h.status));
4518         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) == 0)
4519                 return;
4520
4521         /* Store the time the ccb was in the sim */
4522         done_ccb->ccb_h.qos.sim_data = sbinuptime() - done_ccb->ccb_h.qos.sim_data;
4523         xpt_done_process(&done_ccb->ccb_h);
4524 }
4525
4526 union ccb *
4527 xpt_alloc_ccb()
4528 {
4529         union ccb *new_ccb;
4530
4531         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4532         return (new_ccb);
4533 }
4534
4535 union ccb *
4536 xpt_alloc_ccb_nowait()
4537 {
4538         union ccb *new_ccb;
4539
4540         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4541         return (new_ccb);
4542 }
4543
4544 void
4545 xpt_free_ccb(union ccb *free_ccb)
4546 {
4547         free(free_ccb, M_CAMCCB);
4548 }
4549
4550
4551
4552 /* Private XPT functions */
4553
4554 /*
4555  * Get a CAM control block for the caller. Charge the structure to the device
4556  * referenced by the path.  If we don't have sufficient resources to allocate
4557  * more ccbs, we return NULL.
4558  */
4559 static union ccb *
4560 xpt_get_ccb_nowait(struct cam_periph *periph)
4561 {
4562         union ccb *new_ccb;
4563
4564         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4565         if (new_ccb == NULL)
4566                 return (NULL);
4567         periph->periph_allocated++;
4568         cam_ccbq_take_opening(&periph->path->device->ccbq);
4569         return (new_ccb);
4570 }
4571
4572 static union ccb *
4573 xpt_get_ccb(struct cam_periph *periph)
4574 {
4575         union ccb *new_ccb;
4576
4577         cam_periph_unlock(periph);
4578         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4579         cam_periph_lock(periph);
4580         periph->periph_allocated++;
4581         cam_ccbq_take_opening(&periph->path->device->ccbq);
4582         return (new_ccb);
4583 }
4584
4585 union ccb *
4586 cam_periph_getccb(struct cam_periph *periph, u_int32_t priority)
4587 {
4588         struct ccb_hdr *ccb_h;
4589
4590         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("cam_periph_getccb\n"));
4591         cam_periph_assert(periph, MA_OWNED);
4592         while ((ccb_h = SLIST_FIRST(&periph->ccb_list)) == NULL ||
4593             ccb_h->pinfo.priority != priority) {
4594                 if (priority < periph->immediate_priority) {
4595                         periph->immediate_priority = priority;
4596                         xpt_run_allocq(periph, 0);
4597                 } else
4598                         cam_periph_sleep(periph, &periph->ccb_list, PRIBIO,
4599                             "cgticb", 0);
4600         }
4601         SLIST_REMOVE_HEAD(&periph->ccb_list, periph_links.sle);
4602         return ((union ccb *)ccb_h);
4603 }
4604
4605 static void
4606 xpt_acquire_bus(struct cam_eb *bus)
4607 {
4608
4609         xpt_lock_buses();
4610         bus->refcount++;
4611         xpt_unlock_buses();
4612 }
4613
4614 static void
4615 xpt_release_bus(struct cam_eb *bus)
4616 {
4617
4618         xpt_lock_buses();
4619         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4620         if (--bus->refcount > 0) {
4621                 xpt_unlock_buses();
4622                 return;
4623         }
4624         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4625         xsoftc.bus_generation++;
4626         xpt_unlock_buses();
4627         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4628             ("destroying bus, but target list is not empty"));
4629         cam_sim_release(bus->sim);
4630         mtx_destroy(&bus->eb_mtx);
4631         free(bus, M_CAMXPT);
4632 }
4633
4634 static struct cam_et *
4635 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4636 {
4637         struct cam_et *cur_target, *target;
4638
4639         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4640         mtx_assert(&bus->eb_mtx, MA_OWNED);
4641         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4642                                          M_NOWAIT|M_ZERO);
4643         if (target == NULL)
4644                 return (NULL);
4645
4646         TAILQ_INIT(&target->ed_entries);
4647         target->bus = bus;
4648         target->target_id = target_id;
4649         target->refcount = 1;
4650         target->generation = 0;
4651         target->luns = NULL;
4652         mtx_init(&target->luns_mtx, "CAM LUNs lock", NULL, MTX_DEF);
4653         timevalclear(&target->last_reset);
4654         /*
4655          * Hold a reference to our parent bus so it
4656          * will not go away before we do.
4657          */
4658         bus->refcount++;
4659
4660         /* Insertion sort into our bus's target list */
4661         cur_target = TAILQ_FIRST(&bus->et_entries);
4662         while (cur_target != NULL && cur_target->target_id < target_id)
4663                 cur_target = TAILQ_NEXT(cur_target, links);
4664         if (cur_target != NULL) {
4665                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4666         } else {
4667                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4668         }
4669         bus->generation++;
4670         return (target);
4671 }
4672
4673 static void
4674 xpt_acquire_target(struct cam_et *target)
4675 {
4676         struct cam_eb *bus = target->bus;
4677
4678         mtx_lock(&bus->eb_mtx);
4679         target->refcount++;
4680         mtx_unlock(&bus->eb_mtx);
4681 }
4682
4683 static void
4684 xpt_release_target(struct cam_et *target)
4685 {
4686         struct cam_eb *bus = target->bus;
4687
4688         mtx_lock(&bus->eb_mtx);
4689         if (--target->refcount > 0) {
4690                 mtx_unlock(&bus->eb_mtx);
4691                 return;
4692         }
4693         TAILQ_REMOVE(&bus->et_entries, target, links);
4694         bus->generation++;
4695         mtx_unlock(&bus->eb_mtx);
4696         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4697             ("destroying target, but device list is not empty"));
4698         xpt_release_bus(bus);
4699         mtx_destroy(&target->luns_mtx);
4700         if (target->luns)
4701                 free(target->luns, M_CAMXPT);
4702         free(target, M_CAMXPT);
4703 }
4704
4705 static struct cam_ed *
4706 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4707                          lun_id_t lun_id)
4708 {
4709         struct cam_ed *device;
4710
4711         device = xpt_alloc_device(bus, target, lun_id);
4712         if (device == NULL)
4713                 return (NULL);
4714
4715         device->mintags = 1;
4716         device->maxtags = 1;
4717         return (device);
4718 }
4719
4720 static void
4721 xpt_destroy_device(void *context, int pending)
4722 {
4723         struct cam_ed   *device = context;
4724
4725         mtx_lock(&device->device_mtx);
4726         mtx_destroy(&device->device_mtx);
4727         free(device, M_CAMDEV);
4728 }
4729
4730 struct cam_ed *
4731 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4732 {
4733         struct cam_ed   *cur_device, *device;
4734         struct cam_devq *devq;
4735         cam_status status;
4736
4737         mtx_assert(&bus->eb_mtx, MA_OWNED);
4738         /* Make space for us in the device queue on our bus */
4739         devq = bus->sim->devq;
4740         mtx_lock(&devq->send_mtx);
4741         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4742         mtx_unlock(&devq->send_mtx);
4743         if (status != CAM_REQ_CMP)
4744                 return (NULL);
4745
4746         device = (struct cam_ed *)malloc(sizeof(*device),
4747                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4748         if (device == NULL)
4749                 return (NULL);
4750
4751         cam_init_pinfo(&device->devq_entry);
4752         device->target = target;
4753         device->lun_id = lun_id;
4754         device->sim = bus->sim;
4755         if (cam_ccbq_init(&device->ccbq,
4756                           bus->sim->max_dev_openings) != 0) {
4757                 free(device, M_CAMDEV);
4758                 return (NULL);
4759         }
4760         SLIST_INIT(&device->asyncs);
4761         SLIST_INIT(&device->periphs);
4762         device->generation = 0;
4763         device->flags = CAM_DEV_UNCONFIGURED;
4764         device->tag_delay_count = 0;
4765         device->tag_saved_openings = 0;
4766         device->refcount = 1;
4767         mtx_init(&device->device_mtx, "CAM device lock", NULL, MTX_DEF);
4768         callout_init_mtx(&device->callout, &devq->send_mtx, 0);
4769         TASK_INIT(&device->device_destroy_task, 0, xpt_destroy_device, device);
4770         /*
4771          * Hold a reference to our parent bus so it
4772          * will not go away before we do.
4773          */
4774         target->refcount++;
4775
4776         cur_device = TAILQ_FIRST(&target->ed_entries);
4777         while (cur_device != NULL && cur_device->lun_id < lun_id)
4778                 cur_device = TAILQ_NEXT(cur_device, links);
4779         if (cur_device != NULL)
4780                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4781         else
4782                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4783         target->generation++;
4784         return (device);
4785 }
4786
4787 void
4788 xpt_acquire_device(struct cam_ed *device)
4789 {
4790         struct cam_eb *bus = device->target->bus;
4791
4792         mtx_lock(&bus->eb_mtx);
4793         device->refcount++;
4794         mtx_unlock(&bus->eb_mtx);
4795 }
4796
4797 void
4798 xpt_release_device(struct cam_ed *device)
4799 {
4800         struct cam_eb *bus = device->target->bus;
4801         struct cam_devq *devq;
4802
4803         mtx_lock(&bus->eb_mtx);
4804         if (--device->refcount > 0) {
4805                 mtx_unlock(&bus->eb_mtx);
4806                 return;
4807         }
4808
4809         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4810         device->target->generation++;
4811         mtx_unlock(&bus->eb_mtx);
4812
4813         /* Release our slot in the devq */
4814         devq = bus->sim->devq;
4815         mtx_lock(&devq->send_mtx);
4816         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4817         mtx_unlock(&devq->send_mtx);
4818
4819         KASSERT(SLIST_EMPTY(&device->periphs),
4820             ("destroying device, but periphs list is not empty"));
4821         KASSERT(device->devq_entry.index == CAM_UNQUEUED_INDEX,
4822             ("destroying device while still queued for ccbs"));
4823
4824         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4825                 callout_stop(&device->callout);
4826
4827         xpt_release_target(device->target);
4828
4829         cam_ccbq_fini(&device->ccbq);
4830         /*
4831          * Free allocated memory.  free(9) does nothing if the
4832          * supplied pointer is NULL, so it is safe to call without
4833          * checking.
4834          */
4835         free(device->supported_vpds, M_CAMXPT);
4836         free(device->device_id, M_CAMXPT);
4837         free(device->ext_inq, M_CAMXPT);
4838         free(device->physpath, M_CAMXPT);
4839         free(device->rcap_buf, M_CAMXPT);
4840         free(device->serial_num, M_CAMXPT);
4841         taskqueue_enqueue(xsoftc.xpt_taskq, &device->device_destroy_task);
4842 }
4843
4844 u_int32_t
4845 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4846 {
4847         int     result;
4848         struct  cam_ed *dev;
4849
4850         dev = path->device;
4851         mtx_lock(&dev->sim->devq->send_mtx);
4852         result = cam_ccbq_resize(&dev->ccbq, newopenings);
4853         mtx_unlock(&dev->sim->devq->send_mtx);
4854         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4855          || (dev->inq_flags & SID_CmdQue) != 0)
4856                 dev->tag_saved_openings = newopenings;
4857         return (result);
4858 }
4859
4860 static struct cam_eb *
4861 xpt_find_bus(path_id_t path_id)
4862 {
4863         struct cam_eb *bus;
4864
4865         xpt_lock_buses();
4866         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4867              bus != NULL;
4868              bus = TAILQ_NEXT(bus, links)) {
4869                 if (bus->path_id == path_id) {
4870                         bus->refcount++;
4871                         break;
4872                 }
4873         }
4874         xpt_unlock_buses();
4875         return (bus);
4876 }
4877
4878 static struct cam_et *
4879 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4880 {
4881         struct cam_et *target;
4882
4883         mtx_assert(&bus->eb_mtx, MA_OWNED);
4884         for (target = TAILQ_FIRST(&bus->et_entries);
4885              target != NULL;
4886              target = TAILQ_NEXT(target, links)) {
4887                 if (target->target_id == target_id) {
4888                         target->refcount++;
4889                         break;
4890                 }
4891         }
4892         return (target);
4893 }
4894
4895 static struct cam_ed *
4896 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4897 {
4898         struct cam_ed *device;
4899
4900         mtx_assert(&target->bus->eb_mtx, MA_OWNED);
4901         for (device = TAILQ_FIRST(&target->ed_entries);
4902              device != NULL;
4903              device = TAILQ_NEXT(device, links)) {
4904                 if (device->lun_id == lun_id) {
4905                         device->refcount++;
4906                         break;
4907                 }
4908         }
4909         return (device);
4910 }
4911
4912 void
4913 xpt_start_tags(struct cam_path *path)
4914 {
4915         struct ccb_relsim crs;
4916         struct cam_ed *device;
4917         struct cam_sim *sim;
4918         int    newopenings;
4919
4920         device = path->device;
4921         sim = path->bus->sim;
4922         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4923         xpt_freeze_devq(path, /*count*/1);
4924         device->inq_flags |= SID_CmdQue;
4925         if (device->tag_saved_openings != 0)
4926                 newopenings = device->tag_saved_openings;
4927         else
4928                 newopenings = min(device->maxtags,
4929                                   sim->max_tagged_dev_openings);
4930         xpt_dev_ccbq_resize(path, newopenings);
4931         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4932         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4933         crs.ccb_h.func_code = XPT_REL_SIMQ;
4934         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4935         crs.openings
4936             = crs.release_timeout
4937             = crs.qfrozen_cnt
4938             = 0;
4939         xpt_action((union ccb *)&crs);
4940 }
4941
4942 void
4943 xpt_stop_tags(struct cam_path *path)
4944 {
4945         struct ccb_relsim crs;
4946         struct cam_ed *device;
4947         struct cam_sim *sim;
4948
4949         device = path->device;
4950         sim = path->bus->sim;
4951         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4952         device->tag_delay_count = 0;
4953         xpt_freeze_devq(path, /*count*/1);
4954         device->inq_flags &= ~SID_CmdQue;
4955         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
4956         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4957         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4958         crs.ccb_h.func_code = XPT_REL_SIMQ;
4959         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4960         crs.openings
4961             = crs.release_timeout
4962             = crs.qfrozen_cnt
4963             = 0;
4964         xpt_action((union ccb *)&crs);
4965 }
4966
4967 static void
4968 xpt_boot_delay(void *arg)
4969 {
4970
4971         xpt_release_boot();
4972 }
4973
4974 static void
4975 xpt_config(void *arg)
4976 {
4977         /*
4978          * Now that interrupts are enabled, go find our devices
4979          */
4980         if (taskqueue_start_threads(&xsoftc.xpt_taskq, 1, PRIBIO, "CAM taskq"))
4981                 printf("xpt_config: failed to create taskqueue thread.\n");
4982
4983         /* Setup debugging path */
4984         if (cam_dflags != CAM_DEBUG_NONE) {
4985                 if (xpt_create_path(&cam_dpath, NULL,
4986                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
4987                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
4988                         printf("xpt_config: xpt_create_path() failed for debug"
4989                                " target %d:%d:%d, debugging disabled\n",
4990                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
4991                         cam_dflags = CAM_DEBUG_NONE;
4992                 }
4993         } else
4994                 cam_dpath = NULL;
4995
4996         periphdriver_init(1);
4997         xpt_hold_boot();
4998         callout_init(&xsoftc.boot_callout, 1);
4999         callout_reset_sbt(&xsoftc.boot_callout, SBT_1MS * xsoftc.boot_delay, 0,
5000             xpt_boot_delay, NULL, 0);
5001         /* Fire up rescan thread. */
5002         if (kproc_kthread_add(xpt_scanner_thread, NULL, &cam_proc, NULL, 0, 0,
5003             "cam", "scanner")) {
5004                 printf("xpt_config: failed to create rescan thread.\n");
5005         }
5006 }
5007
5008 void
5009 xpt_hold_boot(void)
5010 {
5011         xpt_lock_buses();
5012         xsoftc.buses_to_config++;
5013         xpt_unlock_buses();
5014 }
5015
5016 void
5017 xpt_release_boot(void)
5018 {
5019         xpt_lock_buses();
5020         xsoftc.buses_to_config--;
5021         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
5022                 struct  xpt_task *task;
5023
5024                 xsoftc.buses_config_done = 1;
5025                 xpt_unlock_buses();
5026                 /* Call manually because we don't have any busses */
5027                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
5028                 if (task != NULL) {
5029                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
5030                         taskqueue_enqueue(taskqueue_thread, &task->task);
5031                 }
5032         } else
5033                 xpt_unlock_buses();
5034 }
5035
5036 /*
5037  * If the given device only has one peripheral attached to it, and if that
5038  * peripheral is the passthrough driver, announce it.  This insures that the
5039  * user sees some sort of announcement for every peripheral in their system.
5040  */
5041 static int
5042 xptpassannouncefunc(struct cam_ed *device, void *arg)
5043 {
5044         struct cam_periph *periph;
5045         int i;
5046
5047         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
5048              periph = SLIST_NEXT(periph, periph_links), i++);
5049
5050         periph = SLIST_FIRST(&device->periphs);
5051         if ((i == 1)
5052          && (strncmp(periph->periph_name, "pass", 4) == 0))
5053                 xpt_announce_periph(periph, NULL);
5054
5055         return(1);
5056 }
5057
5058 static void
5059 xpt_finishconfig_task(void *context, int pending)
5060 {
5061
5062         periphdriver_init(2);
5063         /*
5064          * Check for devices with no "standard" peripheral driver
5065          * attached.  For any devices like that, announce the
5066          * passthrough driver so the user will see something.
5067          */
5068         if (!bootverbose)
5069                 xpt_for_all_devices(xptpassannouncefunc, NULL);
5070
5071         /* Release our hook so that the boot can continue. */
5072         config_intrhook_disestablish(xsoftc.xpt_config_hook);
5073         free(xsoftc.xpt_config_hook, M_CAMXPT);
5074         xsoftc.xpt_config_hook = NULL;
5075
5076         free(context, M_CAMXPT);
5077 }
5078
5079 cam_status
5080 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
5081                    struct cam_path *path)
5082 {
5083         struct ccb_setasync csa;
5084         cam_status status;
5085         int xptpath = 0;
5086
5087         if (path == NULL) {
5088                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
5089                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
5090                 if (status != CAM_REQ_CMP)
5091                         return (status);
5092                 xpt_path_lock(path);
5093                 xptpath = 1;
5094         }
5095
5096         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
5097         csa.ccb_h.func_code = XPT_SASYNC_CB;
5098         csa.event_enable = event;
5099         csa.callback = cbfunc;
5100         csa.callback_arg = cbarg;
5101         xpt_action((union ccb *)&csa);
5102         status = csa.ccb_h.status;
5103
5104         CAM_DEBUG(csa.ccb_h.path, CAM_DEBUG_TRACE,
5105             ("xpt_register_async: func %p\n", cbfunc));
5106
5107         if (xptpath) {
5108                 xpt_path_unlock(path);
5109                 xpt_free_path(path);
5110         }
5111
5112         if ((status == CAM_REQ_CMP) &&
5113             (csa.event_enable & AC_FOUND_DEVICE)) {
5114                 /*
5115                  * Get this peripheral up to date with all
5116                  * the currently existing devices.
5117                  */
5118                 xpt_for_all_devices(xptsetasyncfunc, &csa);
5119         }
5120         if ((status == CAM_REQ_CMP) &&
5121             (csa.event_enable & AC_PATH_REGISTERED)) {
5122                 /*
5123                  * Get this peripheral up to date with all
5124                  * the currently existing busses.
5125                  */
5126                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
5127         }
5128
5129         return (status);
5130 }
5131
5132 static void
5133 xptaction(struct cam_sim *sim, union ccb *work_ccb)
5134 {
5135         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
5136
5137         switch (work_ccb->ccb_h.func_code) {
5138         /* Common cases first */
5139         case XPT_PATH_INQ:              /* Path routing inquiry */
5140         {
5141                 struct ccb_pathinq *cpi;
5142
5143                 cpi = &work_ccb->cpi;
5144                 cpi->version_num = 1; /* XXX??? */
5145                 cpi->hba_inquiry = 0;
5146                 cpi->target_sprt = 0;
5147                 cpi->hba_misc = 0;
5148                 cpi->hba_eng_cnt = 0;
5149                 cpi->max_target = 0;
5150                 cpi->max_lun = 0;
5151                 cpi->initiator_id = 0;
5152                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
5153                 strncpy(cpi->hba_vid, "", HBA_IDLEN);
5154                 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
5155                 cpi->unit_number = sim->unit_number;
5156                 cpi->bus_id = sim->bus_id;
5157                 cpi->base_transfer_speed = 0;
5158                 cpi->protocol = PROTO_UNSPECIFIED;
5159                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
5160                 cpi->transport = XPORT_UNSPECIFIED;
5161                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
5162                 cpi->ccb_h.status = CAM_REQ_CMP;
5163                 xpt_done(work_ccb);
5164                 break;
5165         }
5166         default:
5167                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
5168                 xpt_done(work_ccb);
5169                 break;
5170         }
5171 }
5172
5173 /*
5174  * The xpt as a "controller" has no interrupt sources, so polling
5175  * is a no-op.
5176  */
5177 static void
5178 xptpoll(struct cam_sim *sim)
5179 {
5180 }
5181
5182 void
5183 xpt_lock_buses(void)
5184 {
5185         mtx_lock(&xsoftc.xpt_topo_lock);
5186 }
5187
5188 void
5189 xpt_unlock_buses(void)
5190 {
5191         mtx_unlock(&xsoftc.xpt_topo_lock);
5192 }
5193
5194 struct mtx *
5195 xpt_path_mtx(struct cam_path *path)
5196 {
5197
5198         return (&path->device->device_mtx);
5199 }
5200
5201 static void
5202 xpt_done_process(struct ccb_hdr *ccb_h)
5203 {
5204         struct cam_sim *sim;
5205         struct cam_devq *devq;
5206         struct mtx *mtx = NULL;
5207
5208 #if defined(BUF_TRACKING) || defined(FULL_BUF_TRACKING)
5209         struct ccb_scsiio *csio;
5210
5211         if (ccb_h->func_code == XPT_SCSI_IO) {
5212                 csio = &((union ccb *)ccb_h)->csio;
5213                 if (csio->bio != NULL)
5214                         biotrack(csio->bio, __func__);
5215         }
5216 #endif
5217
5218         if (ccb_h->flags & CAM_HIGH_POWER) {
5219                 struct highpowerlist    *hphead;
5220                 struct cam_ed           *device;
5221
5222                 mtx_lock(&xsoftc.xpt_highpower_lock);
5223                 hphead = &xsoftc.highpowerq;
5224
5225                 device = STAILQ_FIRST(hphead);
5226
5227                 /*
5228                  * Increment the count since this command is done.
5229                  */
5230                 xsoftc.num_highpower++;
5231
5232                 /*
5233                  * Any high powered commands queued up?
5234                  */
5235                 if (device != NULL) {
5236
5237                         STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5238                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5239
5240                         mtx_lock(&device->sim->devq->send_mtx);
5241                         xpt_release_devq_device(device,
5242                                          /*count*/1, /*runqueue*/TRUE);
5243                         mtx_unlock(&device->sim->devq->send_mtx);
5244                 } else
5245                         mtx_unlock(&xsoftc.xpt_highpower_lock);
5246         }
5247
5248         sim = ccb_h->path->bus->sim;
5249
5250         if (ccb_h->status & CAM_RELEASE_SIMQ) {
5251                 xpt_release_simq(sim, /*run_queue*/FALSE);
5252                 ccb_h->status &= ~CAM_RELEASE_SIMQ;
5253         }
5254
5255         if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5256          && (ccb_h->status & CAM_DEV_QFRZN)) {
5257                 xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE);
5258                 ccb_h->status &= ~CAM_DEV_QFRZN;
5259         }
5260
5261         devq = sim->devq;
5262         if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5263                 struct cam_ed *dev = ccb_h->path->device;
5264
5265                 mtx_lock(&devq->send_mtx);
5266                 devq->send_active--;
5267                 devq->send_openings++;
5268                 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5269
5270                 if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5271                   && (dev->ccbq.dev_active == 0))) {
5272                         dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5273                         xpt_release_devq_device(dev, /*count*/1,
5274                                          /*run_queue*/FALSE);
5275                 }
5276
5277                 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5278                   && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5279                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5280                         xpt_release_devq_device(dev, /*count*/1,
5281                                          /*run_queue*/FALSE);
5282                 }
5283
5284                 if (!device_is_queued(dev))
5285                         (void)xpt_schedule_devq(devq, dev);
5286                 xpt_run_devq(devq);
5287                 mtx_unlock(&devq->send_mtx);
5288
5289                 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0) {
5290                         mtx = xpt_path_mtx(ccb_h->path);
5291                         mtx_lock(mtx);
5292
5293                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5294                          && (--dev->tag_delay_count == 0))
5295                                 xpt_start_tags(ccb_h->path);
5296                 }
5297         }
5298
5299         if ((ccb_h->flags & CAM_UNLOCKED) == 0) {
5300                 if (mtx == NULL) {
5301                         mtx = xpt_path_mtx(ccb_h->path);
5302                         mtx_lock(mtx);
5303                 }
5304         } else {
5305                 if (mtx != NULL) {
5306                         mtx_unlock(mtx);
5307                         mtx = NULL;
5308                 }
5309         }
5310
5311         /* Call the peripheral driver's callback */
5312         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5313         (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5314         if (mtx != NULL)
5315                 mtx_unlock(mtx);
5316 }
5317
5318 void
5319 xpt_done_td(void *arg)
5320 {
5321         struct cam_doneq *queue = arg;
5322         struct ccb_hdr *ccb_h;
5323         STAILQ_HEAD(, ccb_hdr)  doneq;
5324
5325         STAILQ_INIT(&doneq);
5326         mtx_lock(&queue->cam_doneq_mtx);
5327         while (1) {
5328                 while (STAILQ_EMPTY(&queue->cam_doneq)) {
5329                         queue->cam_doneq_sleep = 1;
5330                         msleep(&queue->cam_doneq, &queue->cam_doneq_mtx,
5331                             PRIBIO, "-", 0);
5332                         queue->cam_doneq_sleep = 0;
5333                 }
5334                 STAILQ_CONCAT(&doneq, &queue->cam_doneq);
5335                 mtx_unlock(&queue->cam_doneq_mtx);
5336
5337                 THREAD_NO_SLEEPING();
5338                 while ((ccb_h = STAILQ_FIRST(&doneq)) != NULL) {
5339                         STAILQ_REMOVE_HEAD(&doneq, sim_links.stqe);
5340                         xpt_done_process(ccb_h);
5341                 }
5342                 THREAD_SLEEPING_OK();
5343
5344                 mtx_lock(&queue->cam_doneq_mtx);
5345         }
5346 }
5347
5348 static void
5349 camisr_runqueue(void)
5350 {
5351         struct  ccb_hdr *ccb_h;
5352         struct cam_doneq *queue;
5353         int i;
5354
5355         /* Process global queues. */
5356         for (i = 0; i < cam_num_doneqs; i++) {
5357                 queue = &cam_doneqs[i];
5358                 mtx_lock(&queue->cam_doneq_mtx);
5359                 while ((ccb_h = STAILQ_FIRST(&queue->cam_doneq)) != NULL) {
5360                         STAILQ_REMOVE_HEAD(&queue->cam_doneq, sim_links.stqe);
5361                         mtx_unlock(&queue->cam_doneq_mtx);
5362                         xpt_done_process(ccb_h);
5363                         mtx_lock(&queue->cam_doneq_mtx);
5364                 }
5365                 mtx_unlock(&queue->cam_doneq_mtx);
5366         }
5367 }
5368
5369 struct kv
5370 {
5371         uint32_t v;
5372         const char *name;
5373 };
5374
5375 static struct kv map[] = {
5376         { XPT_NOOP, "XPT_NOOP" },
5377         { XPT_SCSI_IO, "XPT_SCSI_IO" },
5378         { XPT_GDEV_TYPE, "XPT_GDEV_TYPE" },
5379         { XPT_GDEVLIST, "XPT_GDEVLIST" },
5380         { XPT_PATH_INQ, "XPT_PATH_INQ" },
5381         { XPT_REL_SIMQ, "XPT_REL_SIMQ" },
5382         { XPT_SASYNC_CB, "XPT_SASYNC_CB" },
5383         { XPT_SDEV_TYPE, "XPT_SDEV_TYPE" },
5384         { XPT_SCAN_BUS, "XPT_SCAN_BUS" },
5385         { XPT_DEV_MATCH, "XPT_DEV_MATCH" },
5386         { XPT_DEBUG, "XPT_DEBUG" },
5387         { XPT_PATH_STATS, "XPT_PATH_STATS" },
5388         { XPT_GDEV_STATS, "XPT_GDEV_STATS" },
5389         { XPT_DEV_ADVINFO, "XPT_DEV_ADVINFO" },
5390         { XPT_ASYNC, "XPT_ASYNC" },
5391         { XPT_ABORT, "XPT_ABORT" },
5392         { XPT_RESET_BUS, "XPT_RESET_BUS" },
5393         { XPT_RESET_DEV, "XPT_RESET_DEV" },
5394         { XPT_TERM_IO, "XPT_TERM_IO" },
5395         { XPT_SCAN_LUN, "XPT_SCAN_LUN" },
5396         { XPT_GET_TRAN_SETTINGS, "XPT_GET_TRAN_SETTINGS" },
5397         { XPT_SET_TRAN_SETTINGS, "XPT_SET_TRAN_SETTINGS" },
5398         { XPT_CALC_GEOMETRY, "XPT_CALC_GEOMETRY" },
5399         { XPT_ATA_IO, "XPT_ATA_IO" },
5400         { XPT_GET_SIM_KNOB, "XPT_GET_SIM_KNOB" },
5401         { XPT_SET_SIM_KNOB, "XPT_SET_SIM_KNOB" },
5402         { XPT_NVME_IO, "XPT_NVME_IO" },
5403         { XPT_MMCSD_IO, "XPT_MMCSD_IO" },
5404         { XPT_SMP_IO, "XPT_SMP_IO" },
5405         { XPT_SCAN_TGT, "XPT_SCAN_TGT" },
5406         { XPT_ENG_INQ, "XPT_ENG_INQ" },
5407         { XPT_ENG_EXEC, "XPT_ENG_EXEC" },
5408         { XPT_EN_LUN, "XPT_EN_LUN" },
5409         { XPT_TARGET_IO, "XPT_TARGET_IO" },
5410         { XPT_ACCEPT_TARGET_IO, "XPT_ACCEPT_TARGET_IO" },
5411         { XPT_CONT_TARGET_IO, "XPT_CONT_TARGET_IO" },
5412         { XPT_IMMED_NOTIFY, "XPT_IMMED_NOTIFY" },
5413         { XPT_NOTIFY_ACK, "XPT_NOTIFY_ACK" },
5414         { XPT_IMMEDIATE_NOTIFY, "XPT_IMMEDIATE_NOTIFY" },
5415         { XPT_NOTIFY_ACKNOWLEDGE, "XPT_NOTIFY_ACKNOWLEDGE" },
5416         { 0, 0 }
5417 };
5418
5419 static const char *
5420 xpt_action_name(uint32_t action)
5421 {
5422         static char buffer[32]; /* Only for unknown messages -- racy */
5423         struct kv *walker = map;
5424
5425         while (walker->name != NULL) {
5426                 if (walker->v == action)
5427                         return (walker->name);
5428                 walker++;
5429         }
5430
5431         snprintf(buffer, sizeof(buffer), "%#x", action);
5432         return (buffer);
5433 }