sys/cam/cam_xpt.c

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