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