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