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                                "-", 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                         if (idd->length < len) {
1163                                 for (l = 0; l < idd->length; l++)
1164                                         buf[l] = idd->identifier[l] ?
1165                                             idd->identifier[l] : ' ';
1166                                 buf[l] = 0;
1167                         } else
1168                                 ret = EFAULT;
1169                 } else if ((idd->proto_codeset & SVPD_ID_CODESET_MASK) == SVPD_ID_CODESET_UTF8) {
1170                         l = strnlen(idd->identifier, idd->length);
1171                         if (l < len) {
1172                                 bcopy(idd->identifier, buf, l);
1173                                 buf[l] = 0;
1174                         } else
1175                                 ret = EFAULT;
1176                 } else {
1177                         if (idd->length * 2 < len) {
1178                                 for (l = 0; l < idd->length; l++)
1179                                         sprintf(buf + l * 2, "%02x",
1180                                             idd->identifier[l]);
1181                         } else
1182                                 ret = EFAULT;
1183                 }
1184         } else {
1185                 ret = 0;
1186                 if (strlcpy(buf, cdai.buf, len) >= len)
1187                         ret = EFAULT;
1188         }
1189
1190 out:
1191         if (cdai.buf != NULL)
1192                 free(cdai.buf, M_CAMXPT);
1193         return ret;
1194 }
1195
1196 static dev_match_ret
1197 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1198             struct cam_eb *bus)
1199 {
1200         dev_match_ret retval;
1201         int i;
1202
1203         retval = DM_RET_NONE;
1204
1205         /*
1206          * If we aren't given something to match against, that's an error.
1207          */
1208         if (bus == NULL)
1209                 return(DM_RET_ERROR);
1210
1211         /*
1212          * If there are no match entries, then this bus matches no
1213          * matter what.
1214          */
1215         if ((patterns == NULL) || (num_patterns == 0))
1216                 return(DM_RET_DESCEND | DM_RET_COPY);
1217
1218         for (i = 0; i < num_patterns; i++) {
1219                 struct bus_match_pattern *cur_pattern;
1220
1221                 /*
1222                  * If the pattern in question isn't for a bus node, we
1223                  * aren't interested.  However, we do indicate to the
1224                  * calling routine that we should continue descending the
1225                  * tree, since the user wants to match against lower-level
1226                  * EDT elements.
1227                  */
1228                 if (patterns[i].type != DEV_MATCH_BUS) {
1229                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1230                                 retval |= DM_RET_DESCEND;
1231                         continue;
1232                 }
1233
1234                 cur_pattern = &patterns[i].pattern.bus_pattern;
1235
1236                 /*
1237                  * If they want to match any bus node, we give them any
1238                  * device node.
1239                  */
1240                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1241                         /* set the copy flag */
1242                         retval |= DM_RET_COPY;
1243
1244                         /*
1245                          * If we've already decided on an action, go ahead
1246                          * and return.
1247                          */
1248                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1249                                 return(retval);
1250                 }
1251
1252                 /*
1253                  * Not sure why someone would do this...
1254                  */
1255                 if (cur_pattern->flags == BUS_MATCH_NONE)
1256                         continue;
1257
1258                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1259                  && (cur_pattern->path_id != bus->path_id))
1260                         continue;
1261
1262                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1263                  && (cur_pattern->bus_id != bus->sim->bus_id))
1264                         continue;
1265
1266                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1267                  && (cur_pattern->unit_number != bus->sim->unit_number))
1268                         continue;
1269
1270                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1271                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1272                              DEV_IDLEN) != 0))
1273                         continue;
1274
1275                 /*
1276                  * If we get to this point, the user definitely wants
1277                  * information on this bus.  So tell the caller to copy the
1278                  * data out.
1279                  */
1280                 retval |= DM_RET_COPY;
1281
1282                 /*
1283                  * If the return action has been set to descend, then we
1284                  * know that we've already seen a non-bus matching
1285                  * expression, therefore we need to further descend the tree.
1286                  * This won't change by continuing around the loop, so we
1287                  * go ahead and return.  If we haven't seen a non-bus
1288                  * matching expression, we keep going around the loop until
1289                  * we exhaust the matching expressions.  We'll set the stop
1290                  * flag once we fall out of the loop.
1291                  */
1292                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1293                         return(retval);
1294         }
1295
1296         /*
1297          * If the return action hasn't been set to descend yet, that means
1298          * we haven't seen anything other than bus matching patterns.  So
1299          * tell the caller to stop descending the tree -- the user doesn't
1300          * want to match against lower level tree elements.
1301          */
1302         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1303                 retval |= DM_RET_STOP;
1304
1305         return(retval);
1306 }
1307
1308 static dev_match_ret
1309 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns,
1310                struct cam_ed *device)
1311 {
1312         dev_match_ret retval;
1313         int i;
1314
1315         retval = DM_RET_NONE;
1316
1317         /*
1318          * If we aren't given something to match against, that's an error.
1319          */
1320         if (device == NULL)
1321                 return(DM_RET_ERROR);
1322
1323         /*
1324          * If there are no match entries, then this device matches no
1325          * matter what.
1326          */
1327         if ((patterns == NULL) || (num_patterns == 0))
1328                 return(DM_RET_DESCEND | DM_RET_COPY);
1329
1330         for (i = 0; i < num_patterns; i++) {
1331                 struct device_match_pattern *cur_pattern;
1332                 struct scsi_vpd_device_id *device_id_page;
1333
1334                 /*
1335                  * If the pattern in question isn't for a device node, we
1336                  * aren't interested.
1337                  */
1338                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1339                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1340                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1341                                 retval |= DM_RET_DESCEND;
1342                         continue;
1343                 }
1344
1345                 cur_pattern = &patterns[i].pattern.device_pattern;
1346
1347                 /* Error out if mutually exclusive options are specified. */
1348                 if ((cur_pattern->flags & (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1349                  == (DEV_MATCH_INQUIRY|DEV_MATCH_DEVID))
1350                         return(DM_RET_ERROR);
1351
1352                 /*
1353                  * If they want to match any device node, we give them any
1354                  * device node.
1355                  */
1356                 if (cur_pattern->flags == DEV_MATCH_ANY)
1357                         goto copy_dev_node;
1358
1359                 /*
1360                  * Not sure why someone would do this...
1361                  */
1362                 if (cur_pattern->flags == DEV_MATCH_NONE)
1363                         continue;
1364
1365                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1366                  && (cur_pattern->path_id != device->target->bus->path_id))
1367                         continue;
1368
1369                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1370                  && (cur_pattern->target_id != device->target->target_id))
1371                         continue;
1372
1373                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1374                  && (cur_pattern->target_lun != device->lun_id))
1375                         continue;
1376
1377                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1378                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1379                                     (caddr_t)&cur_pattern->data.inq_pat,
1380                                     1, sizeof(cur_pattern->data.inq_pat),
1381                                     scsi_static_inquiry_match) == NULL))
1382                         continue;
1383
1384                 device_id_page = (struct scsi_vpd_device_id *)device->device_id;
1385                 if (((cur_pattern->flags & DEV_MATCH_DEVID) != 0)
1386                  && (device->device_id_len < SVPD_DEVICE_ID_HDR_LEN
1387                   || scsi_devid_match((uint8_t *)device_id_page->desc_list,
1388                                       device->device_id_len
1389                                     - SVPD_DEVICE_ID_HDR_LEN,
1390                                       cur_pattern->data.devid_pat.id,
1391                                       cur_pattern->data.devid_pat.id_len) != 0))
1392                         continue;
1393
1394 copy_dev_node:
1395                 /*
1396                  * If we get to this point, the user definitely wants
1397                  * information on this device.  So tell the caller to copy
1398                  * the data out.
1399                  */
1400                 retval |= DM_RET_COPY;
1401
1402                 /*
1403                  * If the return action has been set to descend, then we
1404                  * know that we've already seen a peripheral matching
1405                  * expression, therefore we need to further descend the tree.
1406                  * This won't change by continuing around the loop, so we
1407                  * go ahead and return.  If we haven't seen a peripheral
1408                  * matching expression, we keep going around the loop until
1409                  * we exhaust the matching expressions.  We'll set the stop
1410                  * flag once we fall out of the loop.
1411                  */
1412                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1413                         return(retval);
1414         }
1415
1416         /*
1417          * If the return action hasn't been set to descend yet, that means
1418          * we haven't seen any peripheral matching patterns.  So tell the
1419          * caller to stop descending the tree -- the user doesn't want to
1420          * match against lower level tree elements.
1421          */
1422         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1423                 retval |= DM_RET_STOP;
1424
1425         return(retval);
1426 }
1427
1428 /*
1429  * Match a single peripheral against any number of match patterns.
1430  */
1431 static dev_match_ret
1432 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns,
1433                struct cam_periph *periph)
1434 {
1435         dev_match_ret retval;
1436         int i;
1437
1438         /*
1439          * If we aren't given something to match against, that's an error.
1440          */
1441         if (periph == NULL)
1442                 return(DM_RET_ERROR);
1443
1444         /*
1445          * If there are no match entries, then this peripheral matches no
1446          * matter what.
1447          */
1448         if ((patterns == NULL) || (num_patterns == 0))
1449                 return(DM_RET_STOP | DM_RET_COPY);
1450
1451         /*
1452          * There aren't any nodes below a peripheral node, so there's no
1453          * reason to descend the tree any further.
1454          */
1455         retval = DM_RET_STOP;
1456
1457         for (i = 0; i < num_patterns; i++) {
1458                 struct periph_match_pattern *cur_pattern;
1459
1460                 /*
1461                  * If the pattern in question isn't for a peripheral, we
1462                  * aren't interested.
1463                  */
1464                 if (patterns[i].type != DEV_MATCH_PERIPH)
1465                         continue;
1466
1467                 cur_pattern = &patterns[i].pattern.periph_pattern;
1468
1469                 /*
1470                  * If they want to match on anything, then we will do so.
1471                  */
1472                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1473                         /* set the copy flag */
1474                         retval |= DM_RET_COPY;
1475
1476                         /*
1477                          * We've already set the return action to stop,
1478                          * since there are no nodes below peripherals in
1479                          * the tree.
1480                          */
1481                         return(retval);
1482                 }
1483
1484                 /*
1485                  * Not sure why someone would do this...
1486                  */
1487                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1488                         continue;
1489
1490                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1491                  && (cur_pattern->path_id != periph->path->bus->path_id))
1492                         continue;
1493
1494                 /*
1495                  * For the target and lun id's, we have to make sure the
1496                  * target and lun pointers aren't NULL.  The xpt peripheral
1497                  * has a wildcard target and device.
1498                  */
1499                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1500                  && ((periph->path->target == NULL)
1501                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1502                         continue;
1503
1504                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1505                  && ((periph->path->device == NULL)
1506                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1507                         continue;
1508
1509                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1510                  && (cur_pattern->unit_number != periph->unit_number))
1511                         continue;
1512
1513                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1514                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1515                              DEV_IDLEN) != 0))
1516                         continue;
1517
1518                 /*
1519                  * If we get to this point, the user definitely wants
1520                  * information on this peripheral.  So tell the caller to
1521                  * copy the data out.
1522                  */
1523                 retval |= DM_RET_COPY;
1524
1525                 /*
1526                  * The return action has already been set to stop, since
1527                  * peripherals don't have any nodes below them in the EDT.
1528                  */
1529                 return(retval);
1530         }
1531
1532         /*
1533          * If we get to this point, the peripheral that was passed in
1534          * doesn't match any of the patterns.
1535          */
1536         return(retval);
1537 }
1538
1539 static int
1540 xptedtbusfunc(struct cam_eb *bus, void *arg)
1541 {
1542         struct ccb_dev_match *cdm;
1543         dev_match_ret retval;
1544
1545         cdm = (struct ccb_dev_match *)arg;
1546
1547         /*
1548          * If our position is for something deeper in the tree, that means
1549          * that we've already seen this node.  So, we keep going down.
1550          */
1551         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1552          && (cdm->pos.cookie.bus == bus)
1553          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1554          && (cdm->pos.cookie.target != NULL))
1555                 retval = DM_RET_DESCEND;
1556         else
1557                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1558
1559         /*
1560          * If we got an error, bail out of the search.
1561          */
1562         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1563                 cdm->status = CAM_DEV_MATCH_ERROR;
1564                 return(0);
1565         }
1566
1567         /*
1568          * If the copy flag is set, copy this bus out.
1569          */
1570         if (retval & DM_RET_COPY) {
1571                 int spaceleft, j;
1572
1573                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1574                         sizeof(struct dev_match_result));
1575
1576                 /*
1577                  * If we don't have enough space to put in another
1578                  * match result, save our position and tell the
1579                  * user there are more devices to check.
1580                  */
1581                 if (spaceleft < sizeof(struct dev_match_result)) {
1582                         bzero(&cdm->pos, sizeof(cdm->pos));
1583                         cdm->pos.position_type =
1584                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1585
1586                         cdm->pos.cookie.bus = bus;
1587                         cdm->pos.generations[CAM_BUS_GENERATION]=
1588                                 xsoftc.bus_generation;
1589                         cdm->status = CAM_DEV_MATCH_MORE;
1590                         return(0);
1591                 }
1592                 j = cdm->num_matches;
1593                 cdm->num_matches++;
1594                 cdm->matches[j].type = DEV_MATCH_BUS;
1595                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1596                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1597                 cdm->matches[j].result.bus_result.unit_number =
1598                         bus->sim->unit_number;
1599                 strncpy(cdm->matches[j].result.bus_result.dev_name,
1600                         bus->sim->sim_name, DEV_IDLEN);
1601         }
1602
1603         /*
1604          * If the user is only interested in busses, there's no
1605          * reason to descend to the next level in the tree.
1606          */
1607         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1608                 return(1);
1609
1610         /*
1611          * If there is a target generation recorded, check it to
1612          * make sure the target list hasn't changed.
1613          */
1614         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1615          && (bus == cdm->pos.cookie.bus)
1616          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1617          && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0)
1618          && (cdm->pos.generations[CAM_TARGET_GENERATION] !=
1619              bus->generation)) {
1620                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1621                 return(0);
1622         }
1623
1624         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1625          && (cdm->pos.cookie.bus == bus)
1626          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1627          && (cdm->pos.cookie.target != NULL))
1628                 return(xpttargettraverse(bus,
1629                                         (struct cam_et *)cdm->pos.cookie.target,
1630                                          xptedttargetfunc, arg));
1631         else
1632                 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg));
1633 }
1634
1635 static int
1636 xptedttargetfunc(struct cam_et *target, void *arg)
1637 {
1638         struct ccb_dev_match *cdm;
1639
1640         cdm = (struct ccb_dev_match *)arg;
1641
1642         /*
1643          * If there is a device list generation recorded, check it to
1644          * make sure the device list hasn't changed.
1645          */
1646         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1647          && (cdm->pos.cookie.bus == target->bus)
1648          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1649          && (cdm->pos.cookie.target == target)
1650          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1651          && (cdm->pos.generations[CAM_DEV_GENERATION] != 0)
1652          && (cdm->pos.generations[CAM_DEV_GENERATION] !=
1653              target->generation)) {
1654                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1655                 return(0);
1656         }
1657
1658         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1659          && (cdm->pos.cookie.bus == target->bus)
1660          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1661          && (cdm->pos.cookie.target == target)
1662          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1663          && (cdm->pos.cookie.device != NULL))
1664                 return(xptdevicetraverse(target,
1665                                         (struct cam_ed *)cdm->pos.cookie.device,
1666                                          xptedtdevicefunc, arg));
1667         else
1668                 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg));
1669 }
1670
1671 static int
1672 xptedtdevicefunc(struct cam_ed *device, void *arg)
1673 {
1674
1675         struct ccb_dev_match *cdm;
1676         dev_match_ret retval;
1677
1678         cdm = (struct ccb_dev_match *)arg;
1679
1680         /*
1681          * If our position is for something deeper in the tree, that means
1682          * that we've already seen this node.  So, we keep going down.
1683          */
1684         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1685          && (cdm->pos.cookie.device == device)
1686          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1687          && (cdm->pos.cookie.periph != NULL))
1688                 retval = DM_RET_DESCEND;
1689         else
1690                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
1691                                         device);
1692
1693         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1694                 cdm->status = CAM_DEV_MATCH_ERROR;
1695                 return(0);
1696         }
1697
1698         /*
1699          * If the copy flag is set, copy this device out.
1700          */
1701         if (retval & DM_RET_COPY) {
1702                 int spaceleft, j;
1703
1704                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1705                         sizeof(struct dev_match_result));
1706
1707                 /*
1708                  * If we don't have enough space to put in another
1709                  * match result, save our position and tell the
1710                  * user there are more devices to check.
1711                  */
1712                 if (spaceleft < sizeof(struct dev_match_result)) {
1713                         bzero(&cdm->pos, sizeof(cdm->pos));
1714                         cdm->pos.position_type =
1715                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1716                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
1717
1718                         cdm->pos.cookie.bus = device->target->bus;
1719                         cdm->pos.generations[CAM_BUS_GENERATION]=
1720                                 xsoftc.bus_generation;
1721                         cdm->pos.cookie.target = device->target;
1722                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1723                                 device->target->bus->generation;
1724                         cdm->pos.cookie.device = device;
1725                         cdm->pos.generations[CAM_DEV_GENERATION] =
1726                                 device->target->generation;
1727                         cdm->status = CAM_DEV_MATCH_MORE;
1728                         return(0);
1729                 }
1730                 j = cdm->num_matches;
1731                 cdm->num_matches++;
1732                 cdm->matches[j].type = DEV_MATCH_DEVICE;
1733                 cdm->matches[j].result.device_result.path_id =
1734                         device->target->bus->path_id;
1735                 cdm->matches[j].result.device_result.target_id =
1736                         device->target->target_id;
1737                 cdm->matches[j].result.device_result.target_lun =
1738                         device->lun_id;
1739                 cdm->matches[j].result.device_result.protocol =
1740                         device->protocol;
1741                 bcopy(&device->inq_data,
1742                       &cdm->matches[j].result.device_result.inq_data,
1743                       sizeof(struct scsi_inquiry_data));
1744                 bcopy(&device->ident_data,
1745                       &cdm->matches[j].result.device_result.ident_data,
1746                       sizeof(struct ata_params));
1747
1748                 /* Let the user know whether this device is unconfigured */
1749                 if (device->flags & CAM_DEV_UNCONFIGURED)
1750                         cdm->matches[j].result.device_result.flags =
1751                                 DEV_RESULT_UNCONFIGURED;
1752                 else
1753                         cdm->matches[j].result.device_result.flags =
1754                                 DEV_RESULT_NOFLAG;
1755         }
1756
1757         /*
1758          * If the user isn't interested in peripherals, don't descend
1759          * the tree any further.
1760          */
1761         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1762                 return(1);
1763
1764         /*
1765          * If there is a peripheral list generation recorded, make sure
1766          * it hasn't changed.
1767          */
1768         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1769          && (device->target->bus == cdm->pos.cookie.bus)
1770          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1771          && (device->target == cdm->pos.cookie.target)
1772          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1773          && (device == cdm->pos.cookie.device)
1774          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1775          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
1776          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1777              device->generation)){
1778                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1779                 return(0);
1780         }
1781
1782         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1783          && (cdm->pos.cookie.bus == device->target->bus)
1784          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1785          && (cdm->pos.cookie.target == device->target)
1786          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
1787          && (cdm->pos.cookie.device == device)
1788          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1789          && (cdm->pos.cookie.periph != NULL))
1790                 return(xptperiphtraverse(device,
1791                                 (struct cam_periph *)cdm->pos.cookie.periph,
1792                                 xptedtperiphfunc, arg));
1793         else
1794                 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg));
1795 }
1796
1797 static int
1798 xptedtperiphfunc(struct cam_periph *periph, void *arg)
1799 {
1800         struct ccb_dev_match *cdm;
1801         dev_match_ret retval;
1802
1803         cdm = (struct ccb_dev_match *)arg;
1804
1805         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1806
1807         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1808                 cdm->status = CAM_DEV_MATCH_ERROR;
1809                 return(0);
1810         }
1811
1812         /*
1813          * If the copy flag is set, copy this peripheral out.
1814          */
1815         if (retval & DM_RET_COPY) {
1816                 int spaceleft, j;
1817
1818                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1819                         sizeof(struct dev_match_result));
1820
1821                 /*
1822                  * If we don't have enough space to put in another
1823                  * match result, save our position and tell the
1824                  * user there are more devices to check.
1825                  */
1826                 if (spaceleft < sizeof(struct dev_match_result)) {
1827                         bzero(&cdm->pos, sizeof(cdm->pos));
1828                         cdm->pos.position_type =
1829                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
1830                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
1831                                 CAM_DEV_POS_PERIPH;
1832
1833                         cdm->pos.cookie.bus = periph->path->bus;
1834                         cdm->pos.generations[CAM_BUS_GENERATION]=
1835                                 xsoftc.bus_generation;
1836                         cdm->pos.cookie.target = periph->path->target;
1837                         cdm->pos.generations[CAM_TARGET_GENERATION] =
1838                                 periph->path->bus->generation;
1839                         cdm->pos.cookie.device = periph->path->device;
1840                         cdm->pos.generations[CAM_DEV_GENERATION] =
1841                                 periph->path->target->generation;
1842                         cdm->pos.cookie.periph = periph;
1843                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1844                                 periph->path->device->generation;
1845                         cdm->status = CAM_DEV_MATCH_MORE;
1846                         return(0);
1847                 }
1848
1849                 j = cdm->num_matches;
1850                 cdm->num_matches++;
1851                 cdm->matches[j].type = DEV_MATCH_PERIPH;
1852                 cdm->matches[j].result.periph_result.path_id =
1853                         periph->path->bus->path_id;
1854                 cdm->matches[j].result.periph_result.target_id =
1855                         periph->path->target->target_id;
1856                 cdm->matches[j].result.periph_result.target_lun =
1857                         periph->path->device->lun_id;
1858                 cdm->matches[j].result.periph_result.unit_number =
1859                         periph->unit_number;
1860                 strncpy(cdm->matches[j].result.periph_result.periph_name,
1861                         periph->periph_name, DEV_IDLEN);
1862         }
1863
1864         return(1);
1865 }
1866
1867 static int
1868 xptedtmatch(struct ccb_dev_match *cdm)
1869 {
1870         int ret;
1871
1872         cdm->num_matches = 0;
1873
1874         /*
1875          * Check the bus list generation.  If it has changed, the user
1876          * needs to reset everything and start over.
1877          */
1878         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1879          && (cdm->pos.generations[CAM_BUS_GENERATION] != 0)
1880          && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) {
1881                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1882                 return(0);
1883         }
1884
1885         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1886          && (cdm->pos.cookie.bus != NULL))
1887                 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus,
1888                                      xptedtbusfunc, cdm);
1889         else
1890                 ret = xptbustraverse(NULL, xptedtbusfunc, cdm);
1891
1892         /*
1893          * If we get back 0, that means that we had to stop before fully
1894          * traversing the EDT.  It also means that one of the subroutines
1895          * has set the status field to the proper value.  If we get back 1,
1896          * we've fully traversed the EDT and copied out any matching entries.
1897          */
1898         if (ret == 1)
1899                 cdm->status = CAM_DEV_MATCH_LAST;
1900
1901         return(ret);
1902 }
1903
1904 static int
1905 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
1906 {
1907         struct ccb_dev_match *cdm;
1908
1909         cdm = (struct ccb_dev_match *)arg;
1910
1911         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1912          && (cdm->pos.cookie.pdrv == pdrv)
1913          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1914          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
1915          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
1916              (*pdrv)->generation)) {
1917                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1918                 return(0);
1919         }
1920
1921         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
1922          && (cdm->pos.cookie.pdrv == pdrv)
1923          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
1924          && (cdm->pos.cookie.periph != NULL))
1925                 return(xptpdperiphtraverse(pdrv,
1926                                 (struct cam_periph *)cdm->pos.cookie.periph,
1927                                 xptplistperiphfunc, arg));
1928         else
1929                 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg));
1930 }
1931
1932 static int
1933 xptplistperiphfunc(struct cam_periph *periph, void *arg)
1934 {
1935         struct ccb_dev_match *cdm;
1936         dev_match_ret retval;
1937
1938         cdm = (struct ccb_dev_match *)arg;
1939
1940         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
1941
1942         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1943                 cdm->status = CAM_DEV_MATCH_ERROR;
1944                 return(0);
1945         }
1946
1947         /*
1948          * If the copy flag is set, copy this peripheral out.
1949          */
1950         if (retval & DM_RET_COPY) {
1951                 int spaceleft, j;
1952
1953                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1954                         sizeof(struct dev_match_result));
1955
1956                 /*
1957                  * If we don't have enough space to put in another
1958                  * match result, save our position and tell the
1959                  * user there are more devices to check.
1960                  */
1961                 if (spaceleft < sizeof(struct dev_match_result)) {
1962                         struct periph_driver **pdrv;
1963
1964                         pdrv = NULL;
1965                         bzero(&cdm->pos, sizeof(cdm->pos));
1966                         cdm->pos.position_type =
1967                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
1968                                 CAM_DEV_POS_PERIPH;
1969
1970                         /*
1971                          * This may look a bit non-sensical, but it is
1972                          * actually quite logical.  There are very few
1973                          * peripheral drivers, and bloating every peripheral
1974                          * structure with a pointer back to its parent
1975                          * peripheral driver linker set entry would cost
1976                          * more in the long run than doing this quick lookup.
1977                          */
1978                         for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) {
1979                                 if (strcmp((*pdrv)->driver_name,
1980                                     periph->periph_name) == 0)
1981                                         break;
1982                         }
1983
1984                         if (*pdrv == NULL) {
1985                                 cdm->status = CAM_DEV_MATCH_ERROR;
1986                                 return(0);
1987                         }
1988
1989                         cdm->pos.cookie.pdrv = pdrv;
1990                         /*
1991                          * The periph generation slot does double duty, as
1992                          * does the periph pointer slot.  They are used for
1993                          * both edt and pdrv lookups and positioning.
1994                          */
1995                         cdm->pos.cookie.periph = periph;
1996                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
1997                                 (*pdrv)->generation;
1998                         cdm->status = CAM_DEV_MATCH_MORE;
1999                         return(0);
2000                 }
2001
2002                 j = cdm->num_matches;
2003                 cdm->num_matches++;
2004                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2005                 cdm->matches[j].result.periph_result.path_id =
2006                         periph->path->bus->path_id;
2007
2008                 /*
2009                  * The transport layer peripheral doesn't have a target or
2010                  * lun.
2011                  */
2012                 if (periph->path->target)
2013                         cdm->matches[j].result.periph_result.target_id =
2014                                 periph->path->target->target_id;
2015                 else
2016                         cdm->matches[j].result.periph_result.target_id =
2017                                 CAM_TARGET_WILDCARD;
2018
2019                 if (periph->path->device)
2020                         cdm->matches[j].result.periph_result.target_lun =
2021                                 periph->path->device->lun_id;
2022                 else
2023                         cdm->matches[j].result.periph_result.target_lun =
2024                                 CAM_LUN_WILDCARD;
2025
2026                 cdm->matches[j].result.periph_result.unit_number =
2027                         periph->unit_number;
2028                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2029                         periph->periph_name, DEV_IDLEN);
2030         }
2031
2032         return(1);
2033 }
2034
2035 static int
2036 xptperiphlistmatch(struct ccb_dev_match *cdm)
2037 {
2038         int ret;
2039
2040         cdm->num_matches = 0;
2041
2042         /*
2043          * At this point in the edt traversal function, we check the bus
2044          * list generation to make sure that no busses have been added or
2045          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2046          * For the peripheral driver list traversal function, however, we
2047          * don't have to worry about new peripheral driver types coming or
2048          * going; they're in a linker set, and therefore can't change
2049          * without a recompile.
2050          */
2051
2052         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2053          && (cdm->pos.cookie.pdrv != NULL))
2054                 ret = xptpdrvtraverse(
2055                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2056                                 xptplistpdrvfunc, cdm);
2057         else
2058                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2059
2060         /*
2061          * If we get back 0, that means that we had to stop before fully
2062          * traversing the peripheral driver tree.  It also means that one of
2063          * the subroutines has set the status field to the proper value.  If
2064          * we get back 1, we've fully traversed the EDT and copied out any
2065          * matching entries.
2066          */
2067         if (ret == 1)
2068                 cdm->status = CAM_DEV_MATCH_LAST;
2069
2070         return(ret);
2071 }
2072
2073 static int
2074 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2075 {
2076         struct cam_eb *bus, *next_bus;
2077         int retval;
2078
2079         retval = 1;
2080
2081         xpt_lock_buses();
2082         for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses));
2083              bus != NULL;
2084              bus = next_bus) {
2085
2086                 bus->refcount++;
2087
2088                 /*
2089                  * XXX The locking here is obviously very complex.  We
2090                  * should work to simplify it.
2091                  */
2092                 xpt_unlock_buses();
2093                 CAM_SIM_LOCK(bus->sim);
2094                 retval = tr_func(bus, arg);
2095                 CAM_SIM_UNLOCK(bus->sim);
2096
2097                 xpt_lock_buses();
2098                 next_bus = TAILQ_NEXT(bus, links);
2099                 xpt_unlock_buses();
2100
2101                 xpt_release_bus(bus);
2102
2103                 if (retval == 0)
2104                         return(retval);
2105                 xpt_lock_buses();
2106         }
2107         xpt_unlock_buses();
2108
2109         return(retval);
2110 }
2111
2112 int
2113 xpt_sim_opened(struct cam_sim *sim)
2114 {
2115         struct cam_eb *bus;
2116         struct cam_et *target;
2117         struct cam_ed *device;
2118         struct cam_periph *periph;
2119
2120         KASSERT(sim->refcount >= 1, ("sim->refcount >= 1"));
2121         mtx_assert(sim->mtx, MA_OWNED);
2122
2123         xpt_lock_buses();
2124         TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) {
2125                 if (bus->sim != sim)
2126                         continue;
2127
2128                 TAILQ_FOREACH(target, &bus->et_entries, links) {
2129                         TAILQ_FOREACH(device, &target->ed_entries, links) {
2130                                 SLIST_FOREACH(periph, &device->periphs,
2131                                     periph_links) {
2132                                         if (periph->refcount > 0) {
2133                                                 xpt_unlock_buses();
2134                                                 return (1);
2135                                         }
2136                                 }
2137                         }
2138                 }
2139         }
2140
2141         xpt_unlock_buses();
2142         return (0);
2143 }
2144
2145 static int
2146 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2147                   xpt_targetfunc_t *tr_func, void *arg)
2148 {
2149         struct cam_et *target, *next_target;
2150         int retval;
2151
2152         mtx_assert(bus->sim->mtx, MA_OWNED);
2153         retval = 1;
2154         for (target = (start_target ? start_target :
2155                        TAILQ_FIRST(&bus->et_entries));
2156              target != NULL; target = next_target) {
2157
2158                 target->refcount++;
2159
2160                 retval = tr_func(target, arg);
2161
2162                 next_target = TAILQ_NEXT(target, links);
2163
2164                 xpt_release_target(target);
2165
2166                 if (retval == 0)
2167                         return(retval);
2168         }
2169
2170         return(retval);
2171 }
2172
2173 static int
2174 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2175                   xpt_devicefunc_t *tr_func, void *arg)
2176 {
2177         struct cam_ed *device, *next_device;
2178         int retval;
2179
2180         mtx_assert(target->bus->sim->mtx, MA_OWNED);
2181         retval = 1;
2182         for (device = (start_device ? start_device :
2183                        TAILQ_FIRST(&target->ed_entries));
2184              device != NULL;
2185              device = next_device) {
2186
2187                 /*
2188                  * Hold a reference so the current device does not go away
2189                  * on us.
2190                  */
2191                 device->refcount++;
2192
2193                 retval = tr_func(device, arg);
2194
2195                 /*
2196                  * Grab our next pointer before we release the current
2197                  * device.
2198                  */
2199                 next_device = TAILQ_NEXT(device, links);
2200
2201                 xpt_release_device(device);
2202
2203                 if (retval == 0)
2204                         return(retval);
2205         }
2206
2207         return(retval);
2208 }
2209
2210 static int
2211 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2212                   xpt_periphfunc_t *tr_func, void *arg)
2213 {
2214         struct cam_periph *periph, *next_periph;
2215         int retval;
2216
2217         retval = 1;
2218
2219         mtx_assert(device->sim->mtx, MA_OWNED);
2220         xpt_lock_buses();
2221         for (periph = (start_periph ? start_periph :
2222                        SLIST_FIRST(&device->periphs));
2223              periph != NULL;
2224              periph = next_periph) {
2225
2226
2227                 /*
2228                  * In this case, we want to show peripherals that have been
2229                  * invalidated, but not peripherals that are scheduled to
2230                  * be freed.  So instead of calling cam_periph_acquire(),
2231                  * which will fail if the periph has been invalidated, we
2232                  * just check for the free flag here.  If it is in the
2233                  * process of being freed, we skip to the next periph.
2234                  */
2235                 if (periph->flags & CAM_PERIPH_FREE) {
2236                         next_periph = SLIST_NEXT(periph, periph_links);
2237                         continue;
2238                 }
2239
2240                 /*
2241                  * Acquire a reference to this periph while we call the
2242                  * traversal function, so it can't go away.
2243                  */
2244                 periph->refcount++;
2245
2246                 retval = tr_func(periph, arg);
2247
2248                 /*
2249                  * Grab the next peripheral before we release this one, so
2250                  * our next pointer is still valid.
2251                  */
2252                 next_periph = SLIST_NEXT(periph, periph_links);
2253
2254                 cam_periph_release_locked_buses(periph);
2255
2256                 if (retval == 0)
2257                         goto bailout_done;
2258         }
2259
2260 bailout_done:
2261
2262         xpt_unlock_buses();
2263
2264         return(retval);
2265 }
2266
2267 static int
2268 xptpdrvtraverse(struct periph_driver **start_pdrv,
2269                 xpt_pdrvfunc_t *tr_func, void *arg)
2270 {
2271         struct periph_driver **pdrv;
2272         int retval;
2273
2274         retval = 1;
2275
2276         /*
2277          * We don't traverse the peripheral driver list like we do the
2278          * other lists, because it is a linker set, and therefore cannot be
2279          * changed during runtime.  If the peripheral driver list is ever
2280          * re-done to be something other than a linker set (i.e. it can
2281          * change while the system is running), the list traversal should
2282          * be modified to work like the other traversal functions.
2283          */
2284         for (pdrv = (start_pdrv ? start_pdrv : periph_drivers);
2285              *pdrv != NULL; pdrv++) {
2286                 retval = tr_func(pdrv, arg);
2287
2288                 if (retval == 0)
2289                         return(retval);
2290         }
2291
2292         return(retval);
2293 }
2294
2295 static int
2296 xptpdperiphtraverse(struct periph_driver **pdrv,
2297                     struct cam_periph *start_periph,
2298                     xpt_periphfunc_t *tr_func, void *arg)
2299 {
2300         struct cam_periph *periph, *next_periph;
2301         struct cam_sim *sim;
2302         int retval;
2303
2304         retval = 1;
2305
2306         xpt_lock_buses();
2307         for (periph = (start_periph ? start_periph :
2308              TAILQ_FIRST(&(*pdrv)->units)); periph != NULL;
2309              periph = next_periph) {
2310
2311
2312                 /*
2313                  * In this case, we want to show peripherals that have been
2314                  * invalidated, but not peripherals that are scheduled to
2315                  * be freed.  So instead of calling cam_periph_acquire(),
2316                  * which will fail if the periph has been invalidated, we
2317                  * just check for the free flag here.  If it is free, we
2318                  * skip to the next periph.
2319                  */
2320                 if (periph->flags & CAM_PERIPH_FREE) {
2321                         next_periph = TAILQ_NEXT(periph, unit_links);
2322                         continue;
2323                 }
2324
2325                 /*
2326                  * Acquire a reference to this periph while we call the
2327                  * traversal function, so it can't go away.
2328                  */
2329                 periph->refcount++;
2330                 sim = periph->sim;
2331                 xpt_unlock_buses();
2332                 CAM_SIM_LOCK(sim);
2333                 xpt_lock_buses();
2334                 retval = tr_func(periph, arg);
2335
2336                 /*
2337                  * Grab the next peripheral before we release this one, so
2338                  * our next pointer is still valid.
2339                  */
2340                 next_periph = TAILQ_NEXT(periph, unit_links);
2341
2342                 cam_periph_release_locked_buses(periph);
2343                 CAM_SIM_UNLOCK(sim);
2344
2345                 if (retval == 0)
2346                         goto bailout_done;
2347         }
2348 bailout_done:
2349
2350         xpt_unlock_buses();
2351
2352         return(retval);
2353 }
2354
2355 static int
2356 xptdefbusfunc(struct cam_eb *bus, void *arg)
2357 {
2358         struct xpt_traverse_config *tr_config;
2359
2360         tr_config = (struct xpt_traverse_config *)arg;
2361
2362         if (tr_config->depth == XPT_DEPTH_BUS) {
2363                 xpt_busfunc_t *tr_func;
2364
2365                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2366
2367                 return(tr_func(bus, tr_config->tr_arg));
2368         } else
2369                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2370 }
2371
2372 static int
2373 xptdeftargetfunc(struct cam_et *target, void *arg)
2374 {
2375         struct xpt_traverse_config *tr_config;
2376
2377         tr_config = (struct xpt_traverse_config *)arg;
2378
2379         if (tr_config->depth == XPT_DEPTH_TARGET) {
2380                 xpt_targetfunc_t *tr_func;
2381
2382                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2383
2384                 return(tr_func(target, tr_config->tr_arg));
2385         } else
2386                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2387 }
2388
2389 static int
2390 xptdefdevicefunc(struct cam_ed *device, void *arg)
2391 {
2392         struct xpt_traverse_config *tr_config;
2393
2394         tr_config = (struct xpt_traverse_config *)arg;
2395
2396         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2397                 xpt_devicefunc_t *tr_func;
2398
2399                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2400
2401                 return(tr_func(device, tr_config->tr_arg));
2402         } else
2403                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2404 }
2405
2406 static int
2407 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2408 {
2409         struct xpt_traverse_config *tr_config;
2410         xpt_periphfunc_t *tr_func;
2411
2412         tr_config = (struct xpt_traverse_config *)arg;
2413
2414         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2415
2416         /*
2417          * Unlike the other default functions, we don't check for depth
2418          * here.  The peripheral driver level is the last level in the EDT,
2419          * so if we're here, we should execute the function in question.
2420          */
2421         return(tr_func(periph, tr_config->tr_arg));
2422 }
2423
2424 /*
2425  * Execute the given function for every bus in the EDT.
2426  */
2427 static int
2428 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2429 {
2430         struct xpt_traverse_config tr_config;
2431
2432         tr_config.depth = XPT_DEPTH_BUS;
2433         tr_config.tr_func = tr_func;
2434         tr_config.tr_arg = arg;
2435
2436         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2437 }
2438
2439 /*
2440  * Execute the given function for every device in the EDT.
2441  */
2442 static int
2443 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2444 {
2445         struct xpt_traverse_config tr_config;
2446
2447         tr_config.depth = XPT_DEPTH_DEVICE;
2448         tr_config.tr_func = tr_func;
2449         tr_config.tr_arg = arg;
2450
2451         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2452 }
2453
2454 static int
2455 xptsetasyncfunc(struct cam_ed *device, void *arg)
2456 {
2457         struct cam_path path;
2458         struct ccb_getdev cgd;
2459         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2460
2461         /*
2462          * Don't report unconfigured devices (Wildcard devs,
2463          * devices only for target mode, device instances
2464          * that have been invalidated but are waiting for
2465          * their last reference count to be released).
2466          */
2467         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2468                 return (1);
2469
2470         xpt_compile_path(&path,
2471                          NULL,
2472                          device->target->bus->path_id,
2473                          device->target->target_id,
2474                          device->lun_id);
2475         xpt_setup_ccb(&cgd.ccb_h, &path, CAM_PRIORITY_NORMAL);
2476         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2477         xpt_action((union ccb *)&cgd);
2478         csa->callback(csa->callback_arg,
2479                             AC_FOUND_DEVICE,
2480                             &path, &cgd);
2481         xpt_release_path(&path);
2482
2483         return(1);
2484 }
2485
2486 static int
2487 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2488 {
2489         struct cam_path path;
2490         struct ccb_pathinq cpi;
2491         struct ccb_setasync *csa = (struct ccb_setasync *)arg;
2492
2493         xpt_compile_path(&path, /*periph*/NULL,
2494                          bus->path_id,
2495                          CAM_TARGET_WILDCARD,
2496                          CAM_LUN_WILDCARD);
2497         xpt_setup_ccb(&cpi.ccb_h, &path, CAM_PRIORITY_NORMAL);
2498         cpi.ccb_h.func_code = XPT_PATH_INQ;
2499         xpt_action((union ccb *)&cpi);
2500         csa->callback(csa->callback_arg,
2501                             AC_PATH_REGISTERED,
2502                             &path, &cpi);
2503         xpt_release_path(&path);
2504
2505         return(1);
2506 }
2507
2508 void
2509 xpt_action(union ccb *start_ccb)
2510 {
2511
2512         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2513
2514         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2515         (*(start_ccb->ccb_h.path->bus->xport->action))(start_ccb);
2516 }
2517
2518 void
2519 xpt_action_default(union ccb *start_ccb)
2520 {
2521         struct cam_path *path;
2522
2523         path = start_ccb->ccb_h.path;
2524         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_action_default\n"));
2525
2526         switch (start_ccb->ccb_h.func_code) {
2527         case XPT_SCSI_IO:
2528         {
2529                 struct cam_ed *device;
2530
2531                 /*
2532                  * For the sake of compatibility with SCSI-1
2533                  * devices that may not understand the identify
2534                  * message, we include lun information in the
2535                  * second byte of all commands.  SCSI-1 specifies
2536                  * that luns are a 3 bit value and reserves only 3
2537                  * bits for lun information in the CDB.  Later
2538                  * revisions of the SCSI spec allow for more than 8
2539                  * luns, but have deprecated lun information in the
2540                  * CDB.  So, if the lun won't fit, we must omit.
2541                  *
2542                  * Also be aware that during initial probing for devices,
2543                  * the inquiry information is unknown but initialized to 0.
2544                  * This means that this code will be exercised while probing
2545                  * devices with an ANSI revision greater than 2.
2546                  */
2547                 device = path->device;
2548                 if (device->protocol_version <= SCSI_REV_2
2549                  && start_ccb->ccb_h.target_lun < 8
2550                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2551
2552                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2553                             start_ccb->ccb_h.target_lun << 5;
2554                 }
2555                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2556         }
2557         /* FALLTHROUGH */
2558         case XPT_TARGET_IO:
2559         case XPT_CONT_TARGET_IO:
2560                 start_ccb->csio.sense_resid = 0;
2561                 start_ccb->csio.resid = 0;
2562                 /* FALLTHROUGH */
2563         case XPT_ATA_IO:
2564                 if (start_ccb->ccb_h.func_code == XPT_ATA_IO)
2565                         start_ccb->ataio.resid = 0;
2566                 /* FALLTHROUGH */
2567         case XPT_RESET_DEV:
2568         case XPT_ENG_EXEC:
2569         case XPT_SMP_IO:
2570                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2571                 if (xpt_schedule_devq(path->bus->sim->devq, path->device))
2572                         xpt_run_devq(path->bus->sim->devq);
2573                 break;
2574         case XPT_CALC_GEOMETRY:
2575         {
2576                 struct cam_sim *sim;
2577
2578                 /* Filter out garbage */
2579                 if (start_ccb->ccg.block_size == 0
2580                  || start_ccb->ccg.volume_size == 0) {
2581                         start_ccb->ccg.cylinders = 0;
2582                         start_ccb->ccg.heads = 0;
2583                         start_ccb->ccg.secs_per_track = 0;
2584                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2585                         break;
2586                 }
2587 #if defined(PC98) || defined(__sparc64__)
2588                 /*
2589                  * In a PC-98 system, geometry translation depens on
2590                  * the "real" device geometry obtained from mode page 4.
2591                  * SCSI geometry translation is performed in the
2592                  * initialization routine of the SCSI BIOS and the result
2593                  * stored in host memory.  If the translation is available
2594                  * in host memory, use it.  If not, rely on the default
2595                  * translation the device driver performs.
2596                  * For sparc64, we may need adjust the geometry of large
2597                  * disks in order to fit the limitations of the 16-bit
2598                  * fields of the VTOC8 disk label.
2599                  */
2600                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2601                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2602                         break;
2603                 }
2604 #endif
2605                 sim = path->bus->sim;
2606                 (*(sim->sim_action))(sim, start_ccb);
2607                 break;
2608         }
2609         case XPT_ABORT:
2610         {
2611                 union ccb* abort_ccb;
2612
2613                 abort_ccb = start_ccb->cab.abort_ccb;
2614                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2615
2616                         if (abort_ccb->ccb_h.pinfo.index >= 0) {
2617                                 struct cam_ccbq *ccbq;
2618                                 struct cam_ed *device;
2619
2620                                 device = abort_ccb->ccb_h.path->device;
2621                                 ccbq = &device->ccbq;
2622                                 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2623                                 abort_ccb->ccb_h.status =
2624                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2625                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2626                                 xpt_done(abort_ccb);
2627                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2628                                 break;
2629                         }
2630                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2631                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2632                                 /*
2633                                  * We've caught this ccb en route to
2634                                  * the SIM.  Flag it for abort and the
2635                                  * SIM will do so just before starting
2636                                  * real work on the CCB.
2637                                  */
2638                                 abort_ccb->ccb_h.status =
2639                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2640                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2641                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2642                                 break;
2643                         }
2644                 }
2645                 if (XPT_FC_IS_QUEUED(abort_ccb)
2646                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2647                         /*
2648                          * It's already completed but waiting
2649                          * for our SWI to get to it.
2650                          */
2651                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2652                         break;
2653                 }
2654                 /*
2655                  * If we weren't able to take care of the abort request
2656                  * in the XPT, pass the request down to the SIM for processing.
2657                  */
2658         }
2659         /* FALLTHROUGH */
2660         case XPT_ACCEPT_TARGET_IO:
2661         case XPT_EN_LUN:
2662         case XPT_IMMED_NOTIFY:
2663         case XPT_NOTIFY_ACK:
2664         case XPT_RESET_BUS:
2665         case XPT_IMMEDIATE_NOTIFY:
2666         case XPT_NOTIFY_ACKNOWLEDGE:
2667         case XPT_GET_SIM_KNOB:
2668         case XPT_SET_SIM_KNOB:
2669         {
2670                 struct cam_sim *sim;
2671
2672                 sim = path->bus->sim;
2673                 (*(sim->sim_action))(sim, start_ccb);
2674                 break;
2675         }
2676         case XPT_PATH_INQ:
2677         {
2678                 struct cam_sim *sim;
2679
2680                 sim = path->bus->sim;
2681                 (*(sim->sim_action))(sim, start_ccb);
2682                 break;
2683         }
2684         case XPT_PATH_STATS:
2685                 start_ccb->cpis.last_reset = path->bus->last_reset;
2686                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2687                 break;
2688         case XPT_GDEV_TYPE:
2689         {
2690                 struct cam_ed *dev;
2691
2692                 dev = path->device;
2693                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2694                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2695                 } else {
2696                         struct ccb_getdev *cgd;
2697
2698                         cgd = &start_ccb->cgd;
2699                         cgd->protocol = dev->protocol;
2700                         cgd->inq_data = dev->inq_data;
2701                         cgd->ident_data = dev->ident_data;
2702                         cgd->inq_flags = dev->inq_flags;
2703                         cgd->ccb_h.status = CAM_REQ_CMP;
2704                         cgd->serial_num_len = dev->serial_num_len;
2705                         if ((dev->serial_num_len > 0)
2706                          && (dev->serial_num != NULL))
2707                                 bcopy(dev->serial_num, cgd->serial_num,
2708                                       dev->serial_num_len);
2709                 }
2710                 break;
2711         }
2712         case XPT_GDEV_STATS:
2713         {
2714                 struct cam_ed *dev;
2715
2716                 dev = path->device;
2717                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2718                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2719                 } else {
2720                         struct ccb_getdevstats *cgds;
2721                         struct cam_eb *bus;
2722                         struct cam_et *tar;
2723
2724                         cgds = &start_ccb->cgds;
2725                         bus = path->bus;
2726                         tar = path->target;
2727                         cgds->dev_openings = dev->ccbq.dev_openings;
2728                         cgds->dev_active = dev->ccbq.dev_active;
2729                         cgds->devq_openings = dev->ccbq.devq_openings;
2730                         cgds->devq_queued = cam_ccbq_pending_ccb_count(&dev->ccbq);
2731                         cgds->held = dev->ccbq.held;
2732                         cgds->last_reset = tar->last_reset;
2733                         cgds->maxtags = dev->maxtags;
2734                         cgds->mintags = dev->mintags;
2735                         if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
2736                                 cgds->last_reset = bus->last_reset;
2737                         cgds->ccb_h.status = CAM_REQ_CMP;
2738                 }
2739                 break;
2740         }
2741         case XPT_GDEVLIST:
2742         {
2743                 struct cam_periph       *nperiph;
2744                 struct periph_list      *periph_head;
2745                 struct ccb_getdevlist   *cgdl;
2746                 u_int                   i;
2747                 struct cam_ed           *device;
2748                 int                     found;
2749
2750
2751                 found = 0;
2752
2753                 /*
2754                  * Don't want anyone mucking with our data.
2755                  */
2756                 device = path->device;
2757                 periph_head = &device->periphs;
2758                 cgdl = &start_ccb->cgdl;
2759
2760                 /*
2761                  * Check and see if the list has changed since the user
2762                  * last requested a list member.  If so, tell them that the
2763                  * list has changed, and therefore they need to start over
2764                  * from the beginning.
2765                  */
2766                 if ((cgdl->index != 0) &&
2767                     (cgdl->generation != device->generation)) {
2768                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
2769                         break;
2770                 }
2771
2772                 /*
2773                  * Traverse the list of peripherals and attempt to find
2774                  * the requested peripheral.
2775                  */
2776                 for (nperiph = SLIST_FIRST(periph_head), i = 0;
2777                      (nperiph != NULL) && (i <= cgdl->index);
2778                      nperiph = SLIST_NEXT(nperiph, periph_links), i++) {
2779                         if (i == cgdl->index) {
2780                                 strncpy(cgdl->periph_name,
2781                                         nperiph->periph_name,
2782                                         DEV_IDLEN);
2783                                 cgdl->unit_number = nperiph->unit_number;
2784                                 found = 1;
2785                         }
2786                 }
2787                 if (found == 0) {
2788                         cgdl->status = CAM_GDEVLIST_ERROR;
2789                         break;
2790                 }
2791
2792                 if (nperiph == NULL)
2793                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
2794                 else
2795                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
2796
2797                 cgdl->index++;
2798                 cgdl->generation = device->generation;
2799
2800                 cgdl->ccb_h.status = CAM_REQ_CMP;
2801                 break;
2802         }
2803         case XPT_DEV_MATCH:
2804         {
2805                 dev_pos_type position_type;
2806                 struct ccb_dev_match *cdm;
2807
2808                 cdm = &start_ccb->cdm;
2809
2810                 /*
2811                  * There are two ways of getting at information in the EDT.
2812                  * The first way is via the primary EDT tree.  It starts
2813                  * with a list of busses, then a list of targets on a bus,
2814                  * then devices/luns on a target, and then peripherals on a
2815                  * device/lun.  The "other" way is by the peripheral driver
2816                  * lists.  The peripheral driver lists are organized by
2817                  * peripheral driver.  (obviously)  So it makes sense to
2818                  * use the peripheral driver list if the user is looking
2819                  * for something like "da1", or all "da" devices.  If the
2820                  * user is looking for something on a particular bus/target
2821                  * or lun, it's generally better to go through the EDT tree.
2822                  */
2823
2824                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
2825                         position_type = cdm->pos.position_type;
2826                 else {
2827                         u_int i;
2828
2829                         position_type = CAM_DEV_POS_NONE;
2830
2831                         for (i = 0; i < cdm->num_patterns; i++) {
2832                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
2833                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
2834                                         position_type = CAM_DEV_POS_EDT;
2835                                         break;
2836                                 }
2837                         }
2838
2839                         if (cdm->num_patterns == 0)
2840                                 position_type = CAM_DEV_POS_EDT;
2841                         else if (position_type == CAM_DEV_POS_NONE)
2842                                 position_type = CAM_DEV_POS_PDRV;
2843                 }
2844
2845                 /*
2846                  * Note that we drop the SIM lock here, because the EDT
2847                  * traversal code needs to do its own locking.
2848                  */
2849                 CAM_SIM_UNLOCK(xpt_path_sim(cdm->ccb_h.path));
2850                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
2851                 case CAM_DEV_POS_EDT:
2852                         xptedtmatch(cdm);
2853                         break;
2854                 case CAM_DEV_POS_PDRV:
2855                         xptperiphlistmatch(cdm);
2856                         break;
2857                 default:
2858                         cdm->status = CAM_DEV_MATCH_ERROR;
2859                         break;
2860                 }
2861                 CAM_SIM_LOCK(xpt_path_sim(cdm->ccb_h.path));
2862
2863                 if (cdm->status == CAM_DEV_MATCH_ERROR)
2864                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
2865                 else
2866                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2867
2868                 break;
2869         }
2870         case XPT_SASYNC_CB:
2871         {
2872                 struct ccb_setasync *csa;
2873                 struct async_node *cur_entry;
2874                 struct async_list *async_head;
2875                 u_int32_t added;
2876
2877                 csa = &start_ccb->csa;
2878                 added = csa->event_enable;
2879                 async_head = &path->device->asyncs;
2880
2881                 /*
2882                  * If there is already an entry for us, simply
2883                  * update it.
2884                  */
2885                 cur_entry = SLIST_FIRST(async_head);
2886                 while (cur_entry != NULL) {
2887                         if ((cur_entry->callback_arg == csa->callback_arg)
2888                          && (cur_entry->callback == csa->callback))
2889                                 break;
2890                         cur_entry = SLIST_NEXT(cur_entry, links);
2891                 }
2892
2893                 if (cur_entry != NULL) {
2894                         /*
2895                          * If the request has no flags set,
2896                          * remove the entry.
2897                          */
2898                         added &= ~cur_entry->event_enable;
2899                         if (csa->event_enable == 0) {
2900                                 SLIST_REMOVE(async_head, cur_entry,
2901                                              async_node, links);
2902                                 xpt_release_device(path->device);
2903                                 free(cur_entry, M_CAMXPT);
2904                         } else {
2905                                 cur_entry->event_enable = csa->event_enable;
2906                         }
2907                         csa->event_enable = added;
2908                 } else {
2909                         cur_entry = malloc(sizeof(*cur_entry), M_CAMXPT,
2910                                            M_NOWAIT);
2911                         if (cur_entry == NULL) {
2912                                 csa->ccb_h.status = CAM_RESRC_UNAVAIL;
2913                                 break;
2914                         }
2915                         cur_entry->event_enable = csa->event_enable;
2916                         cur_entry->callback_arg = csa->callback_arg;
2917                         cur_entry->callback = csa->callback;
2918                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
2919                         xpt_acquire_device(path->device);
2920                 }
2921                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2922                 break;
2923         }
2924         case XPT_REL_SIMQ:
2925         {
2926                 struct ccb_relsim *crs;
2927                 struct cam_ed *dev;
2928
2929                 crs = &start_ccb->crs;
2930                 dev = path->device;
2931                 if (dev == NULL) {
2932
2933                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
2934                         break;
2935                 }
2936
2937                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
2938
2939                         /* Don't ever go below one opening */
2940                         if (crs->openings > 0) {
2941                                 xpt_dev_ccbq_resize(path, crs->openings);
2942                                 if (bootverbose) {
2943                                         xpt_print(path,
2944                                             "number of openings is now %d\n",
2945                                             crs->openings);
2946                                 }
2947                         }
2948                 }
2949
2950                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
2951
2952                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
2953
2954                                 /*
2955                                  * Just extend the old timeout and decrement
2956                                  * the freeze count so that a single timeout
2957                                  * is sufficient for releasing the queue.
2958                                  */
2959                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2960                                 callout_stop(&dev->callout);
2961                         } else {
2962
2963                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2964                         }
2965
2966                         callout_reset(&dev->callout,
2967                             (crs->release_timeout * hz) / 1000,
2968                             xpt_release_devq_timeout, dev);
2969
2970                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
2971
2972                 }
2973
2974                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
2975
2976                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
2977                                 /*
2978                                  * Decrement the freeze count so that a single
2979                                  * completion is still sufficient to unfreeze
2980                                  * the queue.
2981                                  */
2982                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2983                         } else {
2984
2985                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
2986                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
2987                         }
2988                 }
2989
2990                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
2991
2992                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
2993                          || (dev->ccbq.dev_active == 0)) {
2994
2995                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
2996                         } else {
2997
2998                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
2999                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3000                         }
3001                 }
3002
3003                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0)
3004                         xpt_release_devq(path, /*count*/1, /*run_queue*/TRUE);
3005                 start_ccb->crs.qfrozen_cnt = dev->ccbq.queue.qfrozen_cnt;
3006                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3007                 break;
3008         }
3009         case XPT_DEBUG: {
3010                 struct cam_path *oldpath;
3011                 struct cam_sim *oldsim;
3012
3013                 /* Check that all request bits are supported. */
3014                 if (start_ccb->cdbg.flags & ~(CAM_DEBUG_COMPILE)) {
3015                         start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3016                         break;
3017                 }
3018
3019                 cam_dflags = CAM_DEBUG_NONE;
3020                 if (cam_dpath != NULL) {
3021                         /* To release the old path we must hold proper lock. */
3022                         oldpath = cam_dpath;
3023                         cam_dpath = NULL;
3024                         oldsim = xpt_path_sim(oldpath);
3025                         CAM_SIM_UNLOCK(xpt_path_sim(start_ccb->ccb_h.path));
3026                         CAM_SIM_LOCK(oldsim);
3027                         xpt_free_path(oldpath);
3028                         CAM_SIM_UNLOCK(oldsim);
3029                         CAM_SIM_LOCK(xpt_path_sim(start_ccb->ccb_h.path));
3030                 }
3031                 if (start_ccb->cdbg.flags != CAM_DEBUG_NONE) {
3032                         if (xpt_create_path(&cam_dpath, NULL,
3033                                             start_ccb->ccb_h.path_id,
3034                                             start_ccb->ccb_h.target_id,
3035                                             start_ccb->ccb_h.target_lun) !=
3036                                             CAM_REQ_CMP) {
3037                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3038                         } else {
3039                                 cam_dflags = start_ccb->cdbg.flags;
3040                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3041                                 xpt_print(cam_dpath, "debugging flags now %x\n",
3042                                     cam_dflags);
3043                         }
3044                 } else
3045                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3046                 break;
3047         }
3048         case XPT_NOOP:
3049                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3050                         xpt_freeze_devq(path, 1);
3051                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3052                 break;
3053         default:
3054         case XPT_SDEV_TYPE:
3055         case XPT_TERM_IO:
3056         case XPT_ENG_INQ:
3057                 /* XXX Implement */
3058                 printf("%s: CCB type %#x not supported\n", __func__,
3059                        start_ccb->ccb_h.func_code);
3060                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3061                 if (start_ccb->ccb_h.func_code & XPT_FC_DEV_QUEUED) {
3062                         xpt_done(start_ccb);
3063                 }
3064                 break;
3065         }
3066 }
3067
3068 void
3069 xpt_polled_action(union ccb *start_ccb)
3070 {
3071         u_int32_t timeout;
3072         struct    cam_sim *sim;
3073         struct    cam_devq *devq;
3074         struct    cam_ed *dev;
3075
3076
3077         timeout = start_ccb->ccb_h.timeout * 10;
3078         sim = start_ccb->ccb_h.path->bus->sim;
3079         devq = sim->devq;
3080         dev = start_ccb->ccb_h.path->device;
3081
3082         mtx_assert(sim->mtx, MA_OWNED);
3083
3084         /* Don't use ISR for this SIM while polling. */
3085         sim->flags |= CAM_SIM_POLLED;
3086
3087         /*
3088          * Steal an opening so that no other queued requests
3089          * can get it before us while we simulate interrupts.
3090          */
3091         dev->ccbq.devq_openings--;
3092         dev->ccbq.dev_openings--;
3093
3094         while(((devq != NULL && devq->send_openings <= 0) ||
3095            dev->ccbq.dev_openings < 0) && (--timeout > 0)) {
3096                 DELAY(100);
3097                 (*(sim->sim_poll))(sim);
3098                 camisr_runqueue(sim);
3099         }
3100
3101         dev->ccbq.devq_openings++;
3102         dev->ccbq.dev_openings++;
3103
3104         if (timeout != 0) {
3105                 xpt_action(start_ccb);
3106                 while(--timeout > 0) {
3107                         (*(sim->sim_poll))(sim);
3108                         camisr_runqueue(sim);
3109                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3110                             != CAM_REQ_INPROG)
3111                                 break;
3112                         DELAY(100);
3113                 }
3114                 if (timeout == 0) {
3115                         /*
3116                          * XXX Is it worth adding a sim_timeout entry
3117                          * point so we can attempt recovery?  If
3118                          * this is only used for dumps, I don't think
3119                          * it is.
3120                          */
3121                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3122                 }
3123         } else {
3124                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3125         }
3126
3127         /* We will use CAM ISR for this SIM again. */
3128         sim->flags &= ~CAM_SIM_POLLED;
3129 }
3130
3131 /*
3132  * Schedule a peripheral driver to receive a ccb when it's
3133  * target device has space for more transactions.
3134  */
3135 void
3136 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority)
3137 {
3138         struct cam_ed *device;
3139         int runq = 0;
3140
3141         mtx_assert(perph->sim->mtx, MA_OWNED);
3142
3143         CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3144         device = perph->path->device;
3145         if (periph_is_queued(perph)) {
3146                 /* Simply reorder based on new priority */
3147                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3148                           ("   change priority to %d\n", new_priority));
3149                 if (new_priority < perph->pinfo.priority) {
3150                         camq_change_priority(&device->drvq,
3151                                              perph->pinfo.index,
3152                                              new_priority);
3153                         runq = 1;
3154                 }
3155         } else {
3156                 /* New entry on the queue */
3157                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3158                           ("   added periph to queue\n"));
3159                 perph->pinfo.priority = new_priority;
3160                 perph->pinfo.generation = ++device->drvq.generation;
3161                 camq_insert(&device->drvq, &perph->pinfo);
3162                 runq = 1;
3163         }
3164         if (runq != 0) {
3165                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3166                           ("   calling xpt_run_dev_allocq\n"));
3167                 xpt_run_dev_allocq(device);
3168         }
3169 }
3170
3171
3172 /*
3173  * Schedule a device to run on a given queue.
3174  * If the device was inserted as a new entry on the queue,
3175  * return 1 meaning the device queue should be run. If we
3176  * were already queued, implying someone else has already
3177  * started the queue, return 0 so the caller doesn't attempt
3178  * to run the queue.
3179  */
3180 int
3181 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3182                  u_int32_t new_priority)
3183 {
3184         int retval;
3185         u_int32_t old_priority;
3186
3187         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3188
3189         old_priority = pinfo->priority;
3190
3191         /*
3192          * Are we already queued?
3193          */
3194         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3195                 /* Simply reorder based on new priority */
3196                 if (new_priority < old_priority) {
3197                         camq_change_priority(queue, pinfo->index,
3198                                              new_priority);
3199                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3200                                         ("changed priority to %d\n",
3201                                          new_priority));
3202                         retval = 1;
3203                 } else
3204                         retval = 0;
3205         } else {
3206                 /* New entry on the queue */
3207                 if (new_priority < old_priority)
3208                         pinfo->priority = new_priority;
3209
3210                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3211                                 ("Inserting onto queue\n"));
3212                 pinfo->generation = ++queue->generation;
3213                 camq_insert(queue, pinfo);
3214                 retval = 1;
3215         }
3216         return (retval);
3217 }
3218
3219 static void
3220 xpt_run_dev_allocq(struct cam_ed *device)
3221 {
3222         struct camq     *drvq;
3223
3224         if (device->ccbq.devq_allocating)
3225                 return;
3226         device->ccbq.devq_allocating = 1;
3227         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq(%p)\n", device));
3228         drvq = &device->drvq;
3229         while ((drvq->entries > 0) &&
3230             (device->ccbq.devq_openings > 0 ||
3231              CAMQ_GET_PRIO(drvq) <= CAM_PRIORITY_OOB) &&
3232             (device->ccbq.queue.qfrozen_cnt == 0)) {
3233                 union   ccb *work_ccb;
3234                 struct  cam_periph *drv;
3235
3236                 KASSERT(drvq->entries > 0, ("xpt_run_dev_allocq: "
3237                     "Device on queue without any work to do"));
3238                 if ((work_ccb = xpt_get_ccb(device)) != NULL) {
3239                         drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD);
3240                         xpt_setup_ccb(&work_ccb->ccb_h, drv->path,
3241                                       drv->pinfo.priority);
3242                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3243                                         ("calling periph start\n"));
3244                         drv->periph_start(drv, work_ccb);
3245                 } else {
3246                         /*
3247                          * Malloc failure in alloc_ccb
3248                          */
3249                         /*
3250                          * XXX add us to a list to be run from free_ccb
3251                          * if we don't have any ccbs active on this
3252                          * device queue otherwise we may never get run
3253                          * again.
3254                          */
3255                         break;
3256                 }
3257         }
3258         device->ccbq.devq_allocating = 0;
3259 }
3260
3261 static void
3262 xpt_run_devq(struct cam_devq *devq)
3263 {
3264         char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
3265
3266         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_devq\n"));
3267
3268         devq->send_queue.qfrozen_cnt++;
3269         while ((devq->send_queue.entries > 0)
3270             && (devq->send_openings > 0)
3271             && (devq->send_queue.qfrozen_cnt <= 1)) {
3272                 struct  cam_ed_qinfo *qinfo;
3273                 struct  cam_ed *device;
3274                 union ccb *work_ccb;
3275                 struct  cam_sim *sim;
3276
3277                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
3278                                                            CAMQ_HEAD);
3279                 device = qinfo->device;
3280                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3281                                 ("running device %p\n", device));
3282
3283                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3284                 if (work_ccb == NULL) {
3285                         printf("device on run queue with no ccbs???\n");
3286                         continue;
3287                 }
3288
3289                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3290
3291                         mtx_lock(&xsoftc.xpt_lock);
3292                         if (xsoftc.num_highpower <= 0) {
3293                                 /*
3294                                  * We got a high power command, but we
3295                                  * don't have any available slots.  Freeze
3296                                  * the device queue until we have a slot
3297                                  * available.
3298                                  */
3299                                 xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3300                                 STAILQ_INSERT_TAIL(&xsoftc.highpowerq,
3301                                                    work_ccb->ccb_h.path->device,
3302                                                    highpowerq_entry);
3303
3304                                 mtx_unlock(&xsoftc.xpt_lock);
3305                                 continue;
3306                         } else {
3307                                 /*
3308                                  * Consume a high power slot while
3309                                  * this ccb runs.
3310                                  */
3311                                 xsoftc.num_highpower--;
3312                         }
3313                         mtx_unlock(&xsoftc.xpt_lock);
3314                 }
3315                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3316                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3317
3318                 devq->send_openings--;
3319                 devq->send_active++;
3320
3321                 xpt_schedule_devq(devq, device);
3322
3323                 if ((work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) {
3324                         /*
3325                          * The client wants to freeze the queue
3326                          * after this CCB is sent.
3327                          */
3328                         xpt_freeze_devq(work_ccb->ccb_h.path, 1);
3329                 }
3330
3331                 /* In Target mode, the peripheral driver knows best... */
3332                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3333                         if ((device->inq_flags & SID_CmdQue) != 0
3334                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3335                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3336                         else
3337                                 /*
3338                                  * Clear this in case of a retried CCB that
3339                                  * failed due to a rejected tag.
3340                                  */
3341                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3342                 }
3343
3344                 switch (work_ccb->ccb_h.func_code) {
3345                 case XPT_SCSI_IO:
3346                         CAM_DEBUG(work_ccb->ccb_h.path,
3347                             CAM_DEBUG_CDB,("%s. CDB: %s\n",
3348                              scsi_op_desc(work_ccb->csio.cdb_io.cdb_bytes[0],
3349                                           &device->inq_data),
3350                              scsi_cdb_string(work_ccb->csio.cdb_io.cdb_bytes,
3351                                              cdb_str, sizeof(cdb_str))));
3352                         break;
3353                 case XPT_ATA_IO:
3354                         CAM_DEBUG(work_ccb->ccb_h.path,
3355                             CAM_DEBUG_CDB,("%s. ACB: %s\n",
3356                              ata_op_string(&work_ccb->ataio.cmd),
3357                              ata_cmd_string(&work_ccb->ataio.cmd,
3358                                             cdb_str, sizeof(cdb_str))));
3359                         break;
3360                 default:
3361                         break;
3362                 }
3363
3364                 /*
3365                  * Device queues can be shared among multiple sim instances
3366                  * that reside on different busses.  Use the SIM in the queue
3367                  * CCB's path, rather than the one in the bus that was passed
3368                  * into this function.
3369                  */
3370                 sim = work_ccb->ccb_h.path->bus->sim;
3371                 (*(sim->sim_action))(sim, work_ccb);
3372         }
3373         devq->send_queue.qfrozen_cnt--;
3374 }
3375
3376 /*
3377  * This function merges stuff from the slave ccb into the master ccb, while
3378  * keeping important fields in the master ccb constant.
3379  */
3380 void
3381 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3382 {
3383
3384         /*
3385          * Pull fields that are valid for peripheral drivers to set
3386          * into the master CCB along with the CCB "payload".
3387          */
3388         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3389         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3390         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3391         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3392         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3393               sizeof(union ccb) - sizeof(struct ccb_hdr));
3394 }
3395
3396 void
3397 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3398 {
3399
3400         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3401         ccb_h->pinfo.priority = priority;
3402         ccb_h->path = path;
3403         ccb_h->path_id = path->bus->path_id;
3404         if (path->target)
3405                 ccb_h->target_id = path->target->target_id;
3406         else
3407                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3408         if (path->device) {
3409                 ccb_h->target_lun = path->device->lun_id;
3410                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3411         } else {
3412                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3413         }
3414         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3415         ccb_h->flags = 0;
3416 }
3417
3418 /* Path manipulation functions */
3419 cam_status
3420 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3421                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3422 {
3423         struct     cam_path *path;
3424         cam_status status;
3425
3426         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_NOWAIT);
3427
3428         if (path == NULL) {
3429                 status = CAM_RESRC_UNAVAIL;
3430                 return(status);
3431         }
3432         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3433         if (status != CAM_REQ_CMP) {
3434                 free(path, M_CAMPATH);
3435                 path = NULL;
3436         }
3437         *new_path_ptr = path;
3438         return (status);
3439 }
3440
3441 cam_status
3442 xpt_create_path_unlocked(struct cam_path **new_path_ptr,
3443                          struct cam_periph *periph, path_id_t path_id,
3444                          target_id_t target_id, lun_id_t lun_id)
3445 {
3446         struct     cam_path *path;
3447         struct     cam_eb *bus = NULL;
3448         cam_status status;
3449
3450         path = (struct cam_path *)malloc(sizeof(*path), M_CAMPATH, M_WAITOK);
3451
3452         bus = xpt_find_bus(path_id);
3453         if (bus != NULL)
3454                 CAM_SIM_LOCK(bus->sim);
3455         status = xpt_compile_path(path, periph, path_id, target_id, lun_id);
3456         if (bus != NULL) {
3457                 CAM_SIM_UNLOCK(bus->sim);
3458                 xpt_release_bus(bus);
3459         }
3460         if (status != CAM_REQ_CMP) {
3461                 free(path, M_CAMPATH);
3462                 path = NULL;
3463         }
3464         *new_path_ptr = path;
3465         return (status);
3466 }
3467
3468 cam_status
3469 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3470                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3471 {
3472         struct       cam_eb *bus;
3473         struct       cam_et *target;
3474         struct       cam_ed *device;
3475         cam_status   status;
3476
3477         status = CAM_REQ_CMP;   /* Completed without error */
3478         target = NULL;          /* Wildcarded */
3479         device = NULL;          /* Wildcarded */
3480
3481         /*
3482          * We will potentially modify the EDT, so block interrupts
3483          * that may attempt to create cam paths.
3484          */
3485         bus = xpt_find_bus(path_id);
3486         if (bus == NULL) {
3487                 status = CAM_PATH_INVALID;
3488         } else {
3489                 target = xpt_find_target(bus, target_id);
3490                 if (target == NULL) {
3491                         /* Create one */
3492                         struct cam_et *new_target;
3493
3494                         new_target = xpt_alloc_target(bus, target_id);
3495                         if (new_target == NULL) {
3496                                 status = CAM_RESRC_UNAVAIL;
3497                         } else {
3498                                 target = new_target;
3499                         }
3500                 }
3501                 if (target != NULL) {
3502                         device = xpt_find_device(target, lun_id);
3503                         if (device == NULL) {
3504                                 /* Create one */
3505                                 struct cam_ed *new_device;
3506
3507                                 new_device =
3508                                     (*(bus->xport->alloc_device))(bus,
3509                                                                       target,
3510                                                                       lun_id);
3511                                 if (new_device == NULL) {
3512                                         status = CAM_RESRC_UNAVAIL;
3513                                 } else {
3514                                         device = new_device;
3515                                 }
3516                         }
3517                 }
3518         }
3519
3520         /*
3521          * Only touch the user's data if we are successful.
3522          */
3523         if (status == CAM_REQ_CMP) {
3524                 new_path->periph = perph;
3525                 new_path->bus = bus;
3526                 new_path->target = target;
3527                 new_path->device = device;
3528                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3529         } else {
3530                 if (device != NULL)
3531                         xpt_release_device(device);
3532                 if (target != NULL)
3533                         xpt_release_target(target);
3534                 if (bus != NULL)
3535                         xpt_release_bus(bus);
3536         }
3537         return (status);
3538 }
3539
3540 void
3541 xpt_release_path(struct cam_path *path)
3542 {
3543         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3544         if (path->device != NULL) {
3545                 xpt_release_device(path->device);
3546                 path->device = NULL;
3547         }
3548         if (path->target != NULL) {
3549                 xpt_release_target(path->target);
3550                 path->target = NULL;
3551         }
3552         if (path->bus != NULL) {
3553                 xpt_release_bus(path->bus);
3554                 path->bus = NULL;
3555         }
3556 }
3557
3558 void
3559 xpt_free_path(struct cam_path *path)
3560 {
3561
3562         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3563         xpt_release_path(path);
3564         free(path, M_CAMPATH);
3565 }
3566
3567 void
3568 xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
3569     uint32_t *periph_ref, uint32_t *target_ref, uint32_t *device_ref)
3570 {
3571
3572         xpt_lock_buses();
3573         if (bus_ref) {
3574                 if (path->bus)
3575                         *bus_ref = path->bus->refcount;
3576                 else
3577                         *bus_ref = 0;
3578         }
3579         if (periph_ref) {
3580                 if (path->periph)
3581                         *periph_ref = path->periph->refcount;
3582                 else
3583                         *periph_ref = 0;
3584         }
3585         xpt_unlock_buses();
3586         if (target_ref) {
3587                 if (path->target)
3588                         *target_ref = path->target->refcount;
3589                 else
3590                         *target_ref = 0;
3591         }
3592         if (device_ref) {
3593                 if (path->device)
3594                         *device_ref = path->device->refcount;
3595                 else
3596                         *device_ref = 0;
3597         }
3598 }
3599
3600 /*
3601  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3602  * in path1, 2 for match with wildcards in path2.
3603  */
3604 int
3605 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3606 {
3607         int retval = 0;
3608
3609         if (path1->bus != path2->bus) {
3610                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3611                         retval = 1;
3612                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3613                         retval = 2;
3614                 else
3615                         return (-1);
3616         }
3617         if (path1->target != path2->target) {
3618                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3619                         if (retval == 0)
3620                                 retval = 1;
3621                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3622                         retval = 2;
3623                 else
3624                         return (-1);
3625         }
3626         if (path1->device != path2->device) {
3627                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3628                         if (retval == 0)
3629                                 retval = 1;
3630                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3631                         retval = 2;
3632                 else
3633                         return (-1);
3634         }
3635         return (retval);
3636 }
3637
3638 int
3639 xpt_path_comp_dev(struct cam_path *path, struct cam_ed *dev)
3640 {
3641         int retval = 0;
3642
3643         if (path->bus != dev->target->bus) {
3644                 if (path->bus->path_id == CAM_BUS_WILDCARD)
3645                         retval = 1;
3646                 else if (dev->target->bus->path_id == CAM_BUS_WILDCARD)
3647                         retval = 2;
3648                 else
3649                         return (-1);
3650         }
3651         if (path->target != dev->target) {
3652                 if (path->target->target_id == CAM_TARGET_WILDCARD) {
3653                         if (retval == 0)
3654                                 retval = 1;
3655                 } else if (dev->target->target_id == CAM_TARGET_WILDCARD)
3656                         retval = 2;
3657                 else
3658                         return (-1);
3659         }
3660         if (path->device != dev) {
3661                 if (path->device->lun_id == CAM_LUN_WILDCARD) {
3662                         if (retval == 0)
3663                                 retval = 1;
3664                 } else if (dev->lun_id == CAM_LUN_WILDCARD)
3665                         retval = 2;
3666                 else
3667                         return (-1);
3668         }
3669         return (retval);
3670 }
3671
3672 void
3673 xpt_print_path(struct cam_path *path)
3674 {
3675
3676         if (path == NULL)
3677                 printf("(nopath): ");
3678         else {
3679                 if (path->periph != NULL)
3680                         printf("(%s%d:", path->periph->periph_name,
3681                                path->periph->unit_number);
3682                 else
3683                         printf("(noperiph:");
3684
3685                 if (path->bus != NULL)
3686                         printf("%s%d:%d:", path->bus->sim->sim_name,
3687                                path->bus->sim->unit_number,
3688                                path->bus->sim->bus_id);
3689                 else
3690                         printf("nobus:");
3691
3692                 if (path->target != NULL)
3693                         printf("%d:", path->target->target_id);
3694                 else
3695                         printf("X:");
3696
3697                 if (path->device != NULL)
3698                         printf("%d): ", path->device->lun_id);
3699                 else
3700                         printf("X): ");
3701         }
3702 }
3703
3704 void
3705 xpt_print_device(struct cam_ed *device)
3706 {
3707
3708         if (device == NULL)
3709                 printf("(nopath): ");
3710         else {
3711                 printf("(noperiph:%s%d:%d:%d:%d): ", device->sim->sim_name,
3712                        device->sim->unit_number,
3713                        device->sim->bus_id,
3714                        device->target->target_id,
3715                        device->lun_id);
3716         }
3717 }
3718
3719 void
3720 xpt_print(struct cam_path *path, const char *fmt, ...)
3721 {
3722         va_list ap;
3723         xpt_print_path(path);
3724         va_start(ap, fmt);
3725         vprintf(fmt, ap);
3726         va_end(ap);
3727 }
3728
3729 int
3730 xpt_path_string(struct cam_path *path, char *str, size_t str_len)
3731 {
3732         struct sbuf sb;
3733
3734 #ifdef INVARIANTS
3735         if (path != NULL && path->bus != NULL)
3736                 mtx_assert(path->bus->sim->mtx, MA_OWNED);
3737 #endif
3738
3739         sbuf_new(&sb, str, str_len, 0);
3740
3741         if (path == NULL)
3742                 sbuf_printf(&sb, "(nopath): ");
3743         else {
3744                 if (path->periph != NULL)
3745                         sbuf_printf(&sb, "(%s%d:", path->periph->periph_name,
3746                                     path->periph->unit_number);
3747                 else
3748                         sbuf_printf(&sb, "(noperiph:");
3749
3750                 if (path->bus != NULL)
3751                         sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name,
3752                                     path->bus->sim->unit_number,
3753                                     path->bus->sim->bus_id);
3754                 else
3755                         sbuf_printf(&sb, "nobus:");
3756
3757                 if (path->target != NULL)
3758                         sbuf_printf(&sb, "%d:", path->target->target_id);
3759                 else
3760                         sbuf_printf(&sb, "X:");
3761
3762                 if (path->device != NULL)
3763                         sbuf_printf(&sb, "%d): ", path->device->lun_id);
3764                 else
3765                         sbuf_printf(&sb, "X): ");
3766         }
3767         sbuf_finish(&sb);
3768
3769         return(sbuf_len(&sb));
3770 }
3771
3772 path_id_t
3773 xpt_path_path_id(struct cam_path *path)
3774 {
3775         return(path->bus->path_id);
3776 }
3777
3778 target_id_t
3779 xpt_path_target_id(struct cam_path *path)
3780 {
3781         if (path->target != NULL)
3782                 return (path->target->target_id);
3783         else
3784                 return (CAM_TARGET_WILDCARD);
3785 }
3786
3787 lun_id_t
3788 xpt_path_lun_id(struct cam_path *path)
3789 {
3790         if (path->device != NULL)
3791                 return (path->device->lun_id);
3792         else
3793                 return (CAM_LUN_WILDCARD);
3794 }
3795
3796 struct cam_sim *
3797 xpt_path_sim(struct cam_path *path)
3798 {
3799
3800         return (path->bus->sim);
3801 }
3802
3803 struct cam_periph*
3804 xpt_path_periph(struct cam_path *path)
3805 {
3806         mtx_assert(path->bus->sim->mtx, MA_OWNED);
3807
3808         return (path->periph);
3809 }
3810
3811 int
3812 xpt_path_legacy_ata_id(struct cam_path *path)
3813 {
3814         struct cam_eb *bus;
3815         int bus_id;
3816
3817         if ((strcmp(path->bus->sim->sim_name, "ata") != 0) &&
3818             strcmp(path->bus->sim->sim_name, "ahcich") != 0 &&
3819             strcmp(path->bus->sim->sim_name, "mvsch") != 0 &&
3820             strcmp(path->bus->sim->sim_name, "siisch") != 0)
3821                 return (-1);
3822
3823         if (strcmp(path->bus->sim->sim_name, "ata") == 0 &&
3824             path->bus->sim->unit_number < 2) {
3825                 bus_id = path->bus->sim->unit_number;
3826         } else {
3827                 bus_id = 2;
3828                 xpt_lock_buses();
3829                 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) {
3830                         if (bus == path->bus)
3831                                 break;
3832                         if ((strcmp(bus->sim->sim_name, "ata") == 0 &&
3833                              bus->sim->unit_number >= 2) ||
3834                             strcmp(bus->sim->sim_name, "ahcich") == 0 ||
3835                             strcmp(bus->sim->sim_name, "mvsch") == 0 ||
3836                             strcmp(bus->sim->sim_name, "siisch") == 0)
3837                                 bus_id++;
3838                 }
3839                 xpt_unlock_buses();
3840         }
3841         if (path->target != NULL) {
3842                 if (path->target->target_id < 2)
3843                         return (bus_id * 2 + path->target->target_id);
3844                 else
3845                         return (-1);
3846         } else
3847                 return (bus_id * 2);
3848 }
3849
3850 /*
3851  * Release a CAM control block for the caller.  Remit the cost of the structure
3852  * to the device referenced by the path.  If the this device had no 'credits'
3853  * and peripheral drivers have registered async callbacks for this notification
3854  * call them now.
3855  */
3856 void
3857 xpt_release_ccb(union ccb *free_ccb)
3858 {
3859         struct   cam_path *path;
3860         struct   cam_ed *device;
3861         struct   cam_eb *bus;
3862         struct   cam_sim *sim;
3863
3864         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
3865         path = free_ccb->ccb_h.path;
3866         device = path->device;
3867         bus = path->bus;
3868         sim = bus->sim;
3869
3870         mtx_assert(sim->mtx, MA_OWNED);
3871
3872         cam_ccbq_release_opening(&device->ccbq);
3873         if (sim->ccb_count > sim->max_ccbs) {
3874                 xpt_free_ccb(free_ccb);
3875                 sim->ccb_count--;
3876         } else {
3877                 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h,
3878                     xpt_links.sle);
3879         }
3880         xpt_run_dev_allocq(device);
3881 }
3882
3883 /* Functions accessed by SIM drivers */
3884
3885 static struct xpt_xport xport_default = {
3886         .alloc_device = xpt_alloc_device_default,
3887         .action = xpt_action_default,
3888         .async = xpt_dev_async_default,
3889 };
3890
3891 /*
3892  * A sim structure, listing the SIM entry points and instance
3893  * identification info is passed to xpt_bus_register to hook the SIM
3894  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
3895  * for this new bus and places it in the array of busses and assigns
3896  * it a path_id.  The path_id may be influenced by "hard wiring"
3897  * information specified by the user.  Once interrupt services are
3898  * available, the bus will be probed.
3899  */
3900 int32_t
3901 xpt_bus_register(struct cam_sim *sim, device_t parent, u_int32_t bus)
3902 {
3903         struct cam_eb *new_bus;
3904         struct cam_eb *old_bus;
3905         struct ccb_pathinq cpi;
3906         struct cam_path *path;
3907         cam_status status;
3908
3909         mtx_assert(sim->mtx, MA_OWNED);
3910
3911         sim->bus_id = bus;
3912         new_bus = (struct cam_eb *)malloc(sizeof(*new_bus),
3913                                           M_CAMXPT, M_NOWAIT);
3914         if (new_bus == NULL) {
3915                 /* Couldn't satisfy request */
3916                 return (CAM_RESRC_UNAVAIL);
3917         }
3918
3919         TAILQ_INIT(&new_bus->et_entries);
3920         cam_sim_hold(sim);
3921         new_bus->sim = sim;
3922         timevalclear(&new_bus->last_reset);
3923         new_bus->flags = 0;
3924         new_bus->refcount = 1;  /* Held until a bus_deregister event */
3925         new_bus->generation = 0;
3926
3927         xpt_lock_buses();
3928         sim->path_id = new_bus->path_id =
3929             xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
3930         old_bus = TAILQ_FIRST(&xsoftc.xpt_busses);
3931         while (old_bus != NULL
3932             && old_bus->path_id < new_bus->path_id)
3933                 old_bus = TAILQ_NEXT(old_bus, links);
3934         if (old_bus != NULL)
3935                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
3936         else
3937                 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links);
3938         xsoftc.bus_generation++;
3939         xpt_unlock_buses();
3940
3941         /*
3942          * Set a default transport so that a PATH_INQ can be issued to
3943          * the SIM.  This will then allow for probing and attaching of
3944          * a more appropriate transport.
3945          */
3946         new_bus->xport = &xport_default;
3947
3948         status = xpt_create_path(&path, /*periph*/NULL, sim->path_id,
3949                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
3950         if (status != CAM_REQ_CMP) {
3951                 xpt_release_bus(new_bus);
3952                 free(path, M_CAMXPT);
3953                 return (CAM_RESRC_UNAVAIL);
3954         }
3955
3956         xpt_setup_ccb(&cpi.ccb_h, path, CAM_PRIORITY_NORMAL);
3957         cpi.ccb_h.func_code = XPT_PATH_INQ;
3958         xpt_action((union ccb *)&cpi);
3959
3960         if (cpi.ccb_h.status == CAM_REQ_CMP) {
3961                 switch (cpi.transport) {
3962                 case XPORT_SPI:
3963                 case XPORT_SAS:
3964                 case XPORT_FC:
3965                 case XPORT_USB:
3966                 case XPORT_ISCSI:
3967                 case XPORT_PPB:
3968                         new_bus->xport = scsi_get_xport();
3969                         break;
3970                 case XPORT_ATA:
3971                 case XPORT_SATA:
3972                         new_bus->xport = ata_get_xport();
3973                         break;
3974                 default:
3975                         new_bus->xport = &xport_default;
3976                         break;
3977                 }
3978         }
3979
3980         /* Notify interested parties */
3981         if (sim->path_id != CAM_XPT_PATH_ID) {
3982
3983                 xpt_async(AC_PATH_REGISTERED, path, &cpi);
3984                 if ((cpi.hba_misc & PIM_NOSCAN) == 0) {
3985                         union   ccb *scan_ccb;
3986
3987                         /* Initiate bus rescan. */
3988                         scan_ccb = xpt_alloc_ccb_nowait();
3989                         if (scan_ccb != NULL) {
3990                                 scan_ccb->ccb_h.path = path;
3991                                 scan_ccb->ccb_h.func_code = XPT_SCAN_BUS;
3992                                 scan_ccb->crcn.flags = 0;
3993                                 xpt_rescan(scan_ccb);
3994                         } else {
3995                                 xpt_print(path,
3996                                           "Can't allocate CCB to scan bus\n");
3997                                 xpt_free_path(path);
3998                         }
3999                 } else
4000                         xpt_free_path(path);
4001         } else
4002                 xpt_free_path(path);
4003         return (CAM_SUCCESS);
4004 }
4005
4006 int32_t
4007 xpt_bus_deregister(path_id_t pathid)
4008 {
4009         struct cam_path bus_path;
4010         cam_status status;
4011
4012         status = xpt_compile_path(&bus_path, NULL, pathid,
4013                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4014         if (status != CAM_REQ_CMP)
4015                 return (status);
4016
4017         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4018         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4019
4020         /* Release the reference count held while registered. */
4021         xpt_release_bus(bus_path.bus);
4022         xpt_release_path(&bus_path);
4023
4024         return (CAM_REQ_CMP);
4025 }
4026
4027 static path_id_t
4028 xptnextfreepathid(void)
4029 {
4030         struct cam_eb *bus;
4031         path_id_t pathid;
4032         const char *strval;
4033
4034         mtx_assert(&xsoftc.xpt_topo_lock, MA_OWNED);
4035         pathid = 0;
4036         bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4037 retry:
4038         /* Find an unoccupied pathid */
4039         while (bus != NULL && bus->path_id <= pathid) {
4040                 if (bus->path_id == pathid)
4041                         pathid++;
4042                 bus = TAILQ_NEXT(bus, links);
4043         }
4044
4045         /*
4046          * Ensure that this pathid is not reserved for
4047          * a bus that may be registered in the future.
4048          */
4049         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4050                 ++pathid;
4051                 /* Start the search over */
4052                 goto retry;
4053         }
4054         return (pathid);
4055 }
4056
4057 static path_id_t
4058 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4059 {
4060         path_id_t pathid;
4061         int i, dunit, val;
4062         char buf[32];
4063         const char *dname;
4064
4065         pathid = CAM_XPT_PATH_ID;
4066         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4067         if (strcmp(buf, "xpt0") == 0 && sim_bus == 0)
4068                 return (pathid);
4069         i = 0;
4070         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
4071                 if (strcmp(dname, "scbus")) {
4072                         /* Avoid a bit of foot shooting. */
4073                         continue;
4074                 }
4075                 if (dunit < 0)          /* unwired?! */
4076                         continue;
4077                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4078                         if (sim_bus == val) {
4079                                 pathid = dunit;
4080                                 break;
4081                         }
4082                 } else if (sim_bus == 0) {
4083                         /* Unspecified matches bus 0 */
4084                         pathid = dunit;
4085                         break;
4086                 } else {
4087                         printf("Ambiguous scbus configuration for %s%d "
4088                                "bus %d, cannot wire down.  The kernel "
4089                                "config entry for scbus%d should "
4090                                "specify a controller bus.\n"
4091                                "Scbus will be assigned dynamically.\n",
4092                                sim_name, sim_unit, sim_bus, dunit);
4093                         break;
4094                 }
4095         }
4096
4097         if (pathid == CAM_XPT_PATH_ID)
4098                 pathid = xptnextfreepathid();
4099         return (pathid);
4100 }
4101
4102 static const char *
4103 xpt_async_string(u_int32_t async_code)
4104 {
4105
4106         switch (async_code) {
4107         case AC_BUS_RESET: return ("AC_BUS_RESET");
4108         case AC_UNSOL_RESEL: return ("AC_UNSOL_RESEL");
4109         case AC_SCSI_AEN: return ("AC_SCSI_AEN");
4110         case AC_SENT_BDR: return ("AC_SENT_BDR");
4111         case AC_PATH_REGISTERED: return ("AC_PATH_REGISTERED");
4112         case AC_PATH_DEREGISTERED: return ("AC_PATH_DEREGISTERED");
4113         case AC_FOUND_DEVICE: return ("AC_FOUND_DEVICE");
4114         case AC_LOST_DEVICE: return ("AC_LOST_DEVICE");
4115         case AC_TRANSFER_NEG: return ("AC_TRANSFER_NEG");
4116         case AC_INQ_CHANGED: return ("AC_INQ_CHANGED");
4117         case AC_GETDEV_CHANGED: return ("AC_GETDEV_CHANGED");
4118         case AC_CONTRACT: return ("AC_CONTRACT");
4119         case AC_ADVINFO_CHANGED: return ("AC_ADVINFO_CHANGED");
4120         case AC_UNIT_ATTENTION: return ("AC_UNIT_ATTENTION");
4121         }
4122         return ("AC_UNKNOWN");
4123 }
4124
4125 void
4126 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4127 {
4128         struct cam_eb *bus;
4129         struct cam_et *target, *next_target;
4130         struct cam_ed *device, *next_device;
4131
4132         mtx_assert(path->bus->sim->mtx, MA_OWNED);
4133         CAM_DEBUG(path, CAM_DEBUG_TRACE | CAM_DEBUG_INFO,
4134             ("xpt_async(%s)\n", xpt_async_string(async_code)));
4135
4136         /*
4137          * Most async events come from a CAM interrupt context.  In
4138          * a few cases, the error recovery code at the peripheral layer,
4139          * which may run from our SWI or a process context, may signal
4140          * deferred events with a call to xpt_async.
4141          */
4142
4143         bus = path->bus;
4144
4145         if (async_code == AC_BUS_RESET) {
4146                 /* Update our notion of when the last reset occurred */
4147                 microtime(&bus->last_reset);
4148         }
4149
4150         for (target = TAILQ_FIRST(&bus->et_entries);
4151              target != NULL;
4152              target = next_target) {
4153
4154                 next_target = TAILQ_NEXT(target, links);
4155
4156                 if (path->target != target
4157                  && path->target->target_id != CAM_TARGET_WILDCARD
4158                  && target->target_id != CAM_TARGET_WILDCARD)
4159                         continue;
4160
4161                 if (async_code == AC_SENT_BDR) {
4162                         /* Update our notion of when the last reset occurred */
4163                         microtime(&path->target->last_reset);
4164                 }
4165
4166                 for (device = TAILQ_FIRST(&target->ed_entries);
4167                      device != NULL;
4168                      device = next_device) {
4169
4170                         next_device = TAILQ_NEXT(device, links);
4171
4172                         if (path->device != device
4173                          && path->device->lun_id != CAM_LUN_WILDCARD
4174                          && device->lun_id != CAM_LUN_WILDCARD)
4175                                 continue;
4176                         /*
4177                          * The async callback could free the device.
4178                          * If it is a broadcast async, it doesn't hold
4179                          * device reference, so take our own reference.
4180                          */
4181                         xpt_acquire_device(device);
4182                         (*(bus->xport->async))(async_code, bus,
4183                                                target, device,
4184                                                async_arg);
4185
4186                         xpt_async_bcast(&device->asyncs, async_code,
4187                                         path, async_arg);
4188                         xpt_release_device(device);
4189                 }
4190         }
4191
4192         /*
4193          * If this wasn't a fully wildcarded async, tell all
4194          * clients that want all async events.
4195          */
4196         if (bus != xpt_periph->path->bus)
4197                 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code,
4198                                 path, async_arg);
4199 }
4200
4201 static void
4202 xpt_async_bcast(struct async_list *async_head,
4203                 u_int32_t async_code,
4204                 struct cam_path *path, void *async_arg)
4205 {
4206         struct async_node *cur_entry;
4207
4208         cur_entry = SLIST_FIRST(async_head);
4209         while (cur_entry != NULL) {
4210                 struct async_node *next_entry;
4211                 /*
4212                  * Grab the next list entry before we call the current
4213                  * entry's callback.  This is because the callback function
4214                  * can delete its async callback entry.
4215                  */
4216                 next_entry = SLIST_NEXT(cur_entry, links);
4217                 if ((cur_entry->event_enable & async_code) != 0)
4218                         cur_entry->callback(cur_entry->callback_arg,
4219                                             async_code, path,
4220                                             async_arg);
4221                 cur_entry = next_entry;
4222         }
4223 }
4224
4225 static void
4226 xpt_dev_async_default(u_int32_t async_code, struct cam_eb *bus,
4227                       struct cam_et *target, struct cam_ed *device,
4228                       void *async_arg)
4229 {
4230         printf("%s called\n", __func__);
4231 }
4232
4233 u_int32_t
4234 xpt_freeze_devq(struct cam_path *path, u_int count)
4235 {
4236         struct cam_ed *dev = path->device;
4237
4238         mtx_assert(path->bus->sim->mtx, MA_OWNED);
4239         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_freeze_devq() %u->%u\n",
4240             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt + count));
4241         dev->ccbq.queue.qfrozen_cnt += count;
4242         /* Remove frozen device from sendq. */
4243         if (device_is_queued(dev)) {
4244                 camq_remove(&dev->sim->devq->send_queue,
4245                     dev->devq_entry.pinfo.index);
4246         }
4247         return (dev->ccbq.queue.qfrozen_cnt);
4248 }
4249
4250 u_int32_t
4251 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4252 {
4253
4254         mtx_assert(sim->mtx, MA_OWNED);
4255         sim->devq->send_queue.qfrozen_cnt += count;
4256         return (sim->devq->send_queue.qfrozen_cnt);
4257 }
4258
4259 static void
4260 xpt_release_devq_timeout(void *arg)
4261 {
4262         struct cam_ed *device;
4263
4264         device = (struct cam_ed *)arg;
4265         CAM_DEBUG_DEV(device, CAM_DEBUG_TRACE, ("xpt_release_devq_timeout\n"));
4266         xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE);
4267 }
4268
4269 void
4270 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4271 {
4272
4273         mtx_assert(path->bus->sim->mtx, MA_OWNED);
4274         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_devq(%d, %d)\n",
4275             count, run_queue));
4276         xpt_release_devq_device(path->device, count, run_queue);
4277 }
4278
4279 void
4280 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4281 {
4282
4283         CAM_DEBUG_DEV(dev, CAM_DEBUG_TRACE,
4284             ("xpt_release_devq_device(%d, %d) %u->%u\n", count, run_queue,
4285             dev->ccbq.queue.qfrozen_cnt, dev->ccbq.queue.qfrozen_cnt - count));
4286         if (count > dev->ccbq.queue.qfrozen_cnt) {
4287 #ifdef INVARIANTS
4288                 printf("xpt_release_devq(): requested %u > present %u\n",
4289                     count, dev->ccbq.queue.qfrozen_cnt);
4290 #endif
4291                 count = dev->ccbq.queue.qfrozen_cnt;
4292         }
4293         dev->ccbq.queue.qfrozen_cnt -= count;
4294         if (dev->ccbq.queue.qfrozen_cnt == 0) {
4295                 /*
4296                  * No longer need to wait for a successful
4297                  * command completion.
4298                  */
4299                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4300                 /*
4301                  * Remove any timeouts that might be scheduled
4302                  * to release this queue.
4303                  */
4304                 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4305                         callout_stop(&dev->callout);
4306                         dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4307                 }
4308                 xpt_run_dev_allocq(dev);
4309                 if (run_queue == 0)
4310                         return;
4311                 /*
4312                  * Now that we are unfrozen schedule the
4313                  * device so any pending transactions are
4314                  * run.
4315                  */
4316                 if (xpt_schedule_devq(dev->sim->devq, dev))
4317                         xpt_run_devq(dev->sim->devq);
4318         }
4319 }
4320
4321 void
4322 xpt_release_simq(struct cam_sim *sim, int run_queue)
4323 {
4324         struct  camq *sendq;
4325
4326         mtx_assert(sim->mtx, MA_OWNED);
4327         sendq = &(sim->devq->send_queue);
4328         if (sendq->qfrozen_cnt <= 0) {
4329 #ifdef INVARIANTS
4330                 printf("xpt_release_simq: requested 1 > present %u\n",
4331                     sendq->qfrozen_cnt);
4332 #endif
4333         } else
4334                 sendq->qfrozen_cnt--;
4335         if (sendq->qfrozen_cnt == 0) {
4336                 /*
4337                  * If there is a timeout scheduled to release this
4338                  * sim queue, remove it.  The queue frozen count is
4339                  * already at 0.
4340                  */
4341                 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4342                         callout_stop(&sim->callout);
4343                         sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4344                 }
4345                 if (run_queue) {
4346                         /*
4347                          * Now that we are unfrozen run the send queue.
4348                          */
4349                         xpt_run_devq(sim->devq);
4350                 }
4351         }
4352 }
4353
4354 /*
4355  * XXX Appears to be unused.
4356  */
4357 static void
4358 xpt_release_simq_timeout(void *arg)
4359 {
4360         struct cam_sim *sim;
4361
4362         sim = (struct cam_sim *)arg;
4363         xpt_release_simq(sim, /* run_queue */ TRUE);
4364 }
4365
4366 void
4367 xpt_done(union ccb *done_ccb)
4368 {
4369         struct cam_sim *sim;
4370         int     first;
4371
4372         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4373         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) {
4374                 /*
4375                  * Queue up the request for handling by our SWI handler
4376                  * any of the "non-immediate" type of ccbs.
4377                  */
4378                 sim = done_ccb->ccb_h.path->bus->sim;
4379                 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h,
4380                     sim_links.tqe);
4381                 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4382                 if ((sim->flags & (CAM_SIM_ON_DONEQ | CAM_SIM_POLLED |
4383                     CAM_SIM_BATCH)) == 0) {
4384                         mtx_lock(&cam_simq_lock);
4385                         first = TAILQ_EMPTY(&cam_simq);
4386                         TAILQ_INSERT_TAIL(&cam_simq, sim, links);
4387                         mtx_unlock(&cam_simq_lock);
4388                         sim->flags |= CAM_SIM_ON_DONEQ;
4389                         if (first)
4390                                 swi_sched(cambio_ih, 0);
4391                 }
4392         }
4393 }
4394
4395 void
4396 xpt_batch_start(struct cam_sim *sim)
4397 {
4398
4399         KASSERT((sim->flags & CAM_SIM_BATCH) == 0, ("Batch flag already set"));
4400         sim->flags |= CAM_SIM_BATCH;
4401 }
4402
4403 void
4404 xpt_batch_done(struct cam_sim *sim)
4405 {
4406
4407         KASSERT((sim->flags & CAM_SIM_BATCH) != 0, ("Batch flag was not set"));
4408         sim->flags &= ~CAM_SIM_BATCH;
4409         if (!TAILQ_EMPTY(&sim->sim_doneq) &&
4410             (sim->flags & CAM_SIM_ON_DONEQ) == 0)
4411                 camisr_runqueue(sim);
4412 }
4413
4414 union ccb *
4415 xpt_alloc_ccb()
4416 {
4417         union ccb *new_ccb;
4418
4419         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_WAITOK);
4420         return (new_ccb);
4421 }
4422
4423 union ccb *
4424 xpt_alloc_ccb_nowait()
4425 {
4426         union ccb *new_ccb;
4427
4428         new_ccb = malloc(sizeof(*new_ccb), M_CAMCCB, M_ZERO|M_NOWAIT);
4429         return (new_ccb);
4430 }
4431
4432 void
4433 xpt_free_ccb(union ccb *free_ccb)
4434 {
4435         free(free_ccb, M_CAMCCB);
4436 }
4437
4438
4439
4440 /* Private XPT functions */
4441
4442 /*
4443  * Get a CAM control block for the caller. Charge the structure to the device
4444  * referenced by the path.  If the this device has no 'credits' then the
4445  * device already has the maximum number of outstanding operations under way
4446  * and we return NULL. If we don't have sufficient resources to allocate more
4447  * ccbs, we also return NULL.
4448  */
4449 static union ccb *
4450 xpt_get_ccb(struct cam_ed *device)
4451 {
4452         union ccb *new_ccb;
4453         struct cam_sim *sim;
4454
4455         sim = device->sim;
4456         if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) {
4457                 new_ccb = xpt_alloc_ccb_nowait();
4458                 if (new_ccb == NULL) {
4459                         return (NULL);
4460                 }
4461                 if ((sim->flags & CAM_SIM_MPSAFE) == 0)
4462                         callout_handle_init(&new_ccb->ccb_h.timeout_ch);
4463                 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h,
4464                                   xpt_links.sle);
4465                 sim->ccb_count++;
4466         }
4467         cam_ccbq_take_opening(&device->ccbq);
4468         SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle);
4469         return (new_ccb);
4470 }
4471
4472 static void
4473 xpt_release_bus(struct cam_eb *bus)
4474 {
4475
4476         xpt_lock_buses();
4477         KASSERT(bus->refcount >= 1, ("bus->refcount >= 1"));
4478         if (--bus->refcount > 0) {
4479                 xpt_unlock_buses();
4480                 return;
4481         }
4482         KASSERT(TAILQ_EMPTY(&bus->et_entries),
4483             ("refcount is zero, but target list is not empty"));
4484         TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links);
4485         xsoftc.bus_generation++;
4486         xpt_unlock_buses();
4487         cam_sim_release(bus->sim);
4488         free(bus, M_CAMXPT);
4489 }
4490
4491 static struct cam_et *
4492 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4493 {
4494         struct cam_et *cur_target, *target;
4495
4496         mtx_assert(bus->sim->mtx, MA_OWNED);
4497         target = (struct cam_et *)malloc(sizeof(*target), M_CAMXPT,
4498                                          M_NOWAIT|M_ZERO);
4499         if (target == NULL)
4500                 return (NULL);
4501
4502         TAILQ_INIT(&target->ed_entries);
4503         target->bus = bus;
4504         target->target_id = target_id;
4505         target->refcount = 1;
4506         target->generation = 0;
4507         target->luns = NULL;
4508         timevalclear(&target->last_reset);
4509         /*
4510          * Hold a reference to our parent bus so it
4511          * will not go away before we do.
4512          */
4513         xpt_lock_buses();
4514         bus->refcount++;
4515         xpt_unlock_buses();
4516
4517         /* Insertion sort into our bus's target list */
4518         cur_target = TAILQ_FIRST(&bus->et_entries);
4519         while (cur_target != NULL && cur_target->target_id < target_id)
4520                 cur_target = TAILQ_NEXT(cur_target, links);
4521         if (cur_target != NULL) {
4522                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4523         } else {
4524                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4525         }
4526         bus->generation++;
4527         return (target);
4528 }
4529
4530 static void
4531 xpt_release_target(struct cam_et *target)
4532 {
4533
4534         mtx_assert(target->bus->sim->mtx, MA_OWNED);
4535         if (--target->refcount > 0)
4536                 return;
4537         KASSERT(TAILQ_EMPTY(&target->ed_entries),
4538             ("refcount is zero, but device list is not empty"));
4539         TAILQ_REMOVE(&target->bus->et_entries, target, links);
4540         target->bus->generation++;
4541         xpt_release_bus(target->bus);
4542         if (target->luns)
4543                 free(target->luns, M_CAMXPT);
4544         free(target, M_CAMXPT);
4545 }
4546
4547 static struct cam_ed *
4548 xpt_alloc_device_default(struct cam_eb *bus, struct cam_et *target,
4549                          lun_id_t lun_id)
4550 {
4551         struct cam_ed *device;
4552
4553         device = xpt_alloc_device(bus, target, lun_id);
4554         if (device == NULL)
4555                 return (NULL);
4556
4557         device->mintags = 1;
4558         device->maxtags = 1;
4559         bus->sim->max_ccbs += device->ccbq.devq_openings;
4560         return (device);
4561 }
4562
4563 struct cam_ed *
4564 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4565 {
4566         struct cam_ed   *cur_device, *device;
4567         struct cam_devq *devq;
4568         cam_status status;
4569
4570         mtx_assert(target->bus->sim->mtx, MA_OWNED);
4571         /* Make space for us in the device queue on our bus */
4572         devq = bus->sim->devq;
4573         status = cam_devq_resize(devq, devq->send_queue.array_size + 1);
4574         if (status != CAM_REQ_CMP)
4575                 return (NULL);
4576
4577         device = (struct cam_ed *)malloc(sizeof(*device),
4578                                          M_CAMDEV, M_NOWAIT|M_ZERO);
4579         if (device == NULL)
4580                 return (NULL);
4581
4582         cam_init_pinfo(&device->devq_entry.pinfo);
4583         device->devq_entry.device = device;
4584         device->target = target;
4585         device->lun_id = lun_id;
4586         device->sim = bus->sim;
4587         /* Initialize our queues */
4588         if (camq_init(&device->drvq, 0) != 0) {
4589                 free(device, M_CAMDEV);
4590                 return (NULL);
4591         }
4592         if (cam_ccbq_init(&device->ccbq,
4593                           bus->sim->max_dev_openings) != 0) {
4594                 camq_fini(&device->drvq);
4595                 free(device, M_CAMDEV);
4596                 return (NULL);
4597         }
4598         SLIST_INIT(&device->asyncs);
4599         SLIST_INIT(&device->periphs);
4600         device->generation = 0;
4601         device->owner = NULL;
4602         device->flags = CAM_DEV_UNCONFIGURED;
4603         device->tag_delay_count = 0;
4604         device->tag_saved_openings = 0;
4605         device->refcount = 1;
4606         callout_init_mtx(&device->callout, bus->sim->mtx, 0);
4607
4608         cur_device = TAILQ_FIRST(&target->ed_entries);
4609         while (cur_device != NULL && cur_device->lun_id < lun_id)
4610                 cur_device = TAILQ_NEXT(cur_device, links);
4611         if (cur_device != NULL)
4612                 TAILQ_INSERT_BEFORE(cur_device, device, links);
4613         else
4614                 TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4615         target->refcount++;
4616         target->generation++;
4617         return (device);
4618 }
4619
4620 void
4621 xpt_acquire_device(struct cam_ed *device)
4622 {
4623
4624         mtx_assert(device->sim->mtx, MA_OWNED);
4625         device->refcount++;
4626 }
4627
4628 void
4629 xpt_release_device(struct cam_ed *device)
4630 {
4631         struct cam_devq *devq;
4632
4633         mtx_assert(device->sim->mtx, MA_OWNED);
4634         if (--device->refcount > 0)
4635                 return;
4636
4637         KASSERT(SLIST_EMPTY(&device->periphs),
4638             ("refcount is zero, but periphs list is not empty"));
4639         if (device->devq_entry.pinfo.index != CAM_UNQUEUED_INDEX)
4640                 panic("Removing device while still queued for ccbs");
4641
4642         if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0)
4643                 callout_stop(&device->callout);
4644
4645         TAILQ_REMOVE(&device->target->ed_entries, device,links);
4646         device->target->generation++;
4647         device->target->bus->sim->max_ccbs -= device->ccbq.devq_openings;
4648         /* Release our slot in the devq */
4649         devq = device->target->bus->sim->devq;
4650         cam_devq_resize(devq, devq->send_queue.array_size - 1);
4651         camq_fini(&device->drvq);
4652         cam_ccbq_fini(&device->ccbq);
4653         /*
4654          * Free allocated memory.  free(9) does nothing if the
4655          * supplied pointer is NULL, so it is safe to call without
4656          * checking.
4657          */
4658         free(device->supported_vpds, M_CAMXPT);
4659         free(device->device_id, M_CAMXPT);
4660         free(device->physpath, M_CAMXPT);
4661         free(device->rcap_buf, M_CAMXPT);
4662         free(device->serial_num, M_CAMXPT);
4663
4664         xpt_release_target(device->target);
4665         free(device, M_CAMDEV);
4666 }
4667
4668 u_int32_t
4669 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4670 {
4671         int     diff;
4672         int     result;
4673         struct  cam_ed *dev;
4674
4675         dev = path->device;
4676
4677         diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings);
4678         result = cam_ccbq_resize(&dev->ccbq, newopenings);
4679         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
4680          || (dev->inq_flags & SID_CmdQue) != 0)
4681                 dev->tag_saved_openings = newopenings;
4682         /* Adjust the global limit */
4683         dev->sim->max_ccbs += diff;
4684         return (result);
4685 }
4686
4687 static struct cam_eb *
4688 xpt_find_bus(path_id_t path_id)
4689 {
4690         struct cam_eb *bus;
4691
4692         xpt_lock_buses();
4693         for (bus = TAILQ_FIRST(&xsoftc.xpt_busses);
4694              bus != NULL;
4695              bus = TAILQ_NEXT(bus, links)) {
4696                 if (bus->path_id == path_id) {
4697                         bus->refcount++;
4698                         break;
4699                 }
4700         }
4701         xpt_unlock_buses();
4702         return (bus);
4703 }
4704
4705 static struct cam_et *
4706 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4707 {
4708         struct cam_et *target;
4709
4710         mtx_assert(bus->sim->mtx, MA_OWNED);
4711         for (target = TAILQ_FIRST(&bus->et_entries);
4712              target != NULL;
4713              target = TAILQ_NEXT(target, links)) {
4714                 if (target->target_id == target_id) {
4715                         target->refcount++;
4716                         break;
4717                 }
4718         }
4719         return (target);
4720 }
4721
4722 static struct cam_ed *
4723 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4724 {
4725         struct cam_ed *device;
4726
4727         mtx_assert(target->bus->sim->mtx, MA_OWNED);
4728         for (device = TAILQ_FIRST(&target->ed_entries);
4729              device != NULL;
4730              device = TAILQ_NEXT(device, links)) {
4731                 if (device->lun_id == lun_id) {
4732                         device->refcount++;
4733                         break;
4734                 }
4735         }
4736         return (device);
4737 }
4738
4739 void
4740 xpt_start_tags(struct cam_path *path)
4741 {
4742         struct ccb_relsim crs;
4743         struct cam_ed *device;
4744         struct cam_sim *sim;
4745         int    newopenings;
4746
4747         device = path->device;
4748         sim = path->bus->sim;
4749         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4750         xpt_freeze_devq(path, /*count*/1);
4751         device->inq_flags |= SID_CmdQue;
4752         if (device->tag_saved_openings != 0)
4753                 newopenings = device->tag_saved_openings;
4754         else
4755                 newopenings = min(device->maxtags,
4756                                   sim->max_tagged_dev_openings);
4757         xpt_dev_ccbq_resize(path, newopenings);
4758         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4759         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4760         crs.ccb_h.func_code = XPT_REL_SIMQ;
4761         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4762         crs.openings
4763             = crs.release_timeout
4764             = crs.qfrozen_cnt
4765             = 0;
4766         xpt_action((union ccb *)&crs);
4767 }
4768
4769 void
4770 xpt_stop_tags(struct cam_path *path)
4771 {
4772         struct ccb_relsim crs;
4773         struct cam_ed *device;
4774         struct cam_sim *sim;
4775
4776         device = path->device;
4777         sim = path->bus->sim;
4778         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
4779         device->tag_delay_count = 0;
4780         xpt_freeze_devq(path, /*count*/1);
4781         device->inq_flags &= ~SID_CmdQue;
4782         xpt_dev_ccbq_resize(path, sim->max_dev_openings);
4783         xpt_async(AC_GETDEV_CHANGED, path, NULL);
4784         xpt_setup_ccb(&crs.ccb_h, path, CAM_PRIORITY_NORMAL);
4785         crs.ccb_h.func_code = XPT_REL_SIMQ;
4786         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
4787         crs.openings
4788             = crs.release_timeout
4789             = crs.qfrozen_cnt
4790             = 0;
4791         xpt_action((union ccb *)&crs);
4792 }
4793
4794 static void
4795 xpt_boot_delay(void *arg)
4796 {
4797
4798         xpt_release_boot();
4799 }
4800
4801 static void
4802 xpt_config(void *arg)
4803 {
4804         /*
4805          * Now that interrupts are enabled, go find our devices
4806          */
4807
4808         /* Setup debugging path */
4809         if (cam_dflags != CAM_DEBUG_NONE) {
4810                 if (xpt_create_path_unlocked(&cam_dpath, NULL,
4811                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
4812                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
4813                         printf("xpt_config: xpt_create_path() failed for debug"
4814                                " target %d:%d:%d, debugging disabled\n",
4815                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
4816                         cam_dflags = CAM_DEBUG_NONE;
4817                 }
4818         } else
4819                 cam_dpath = NULL;
4820
4821         periphdriver_init(1);
4822         xpt_hold_boot();
4823         callout_init(&xsoftc.boot_callout, 1);
4824         callout_reset(&xsoftc.boot_callout, hz * xsoftc.boot_delay / 1000,
4825             xpt_boot_delay, NULL);
4826         /* Fire up rescan thread. */
4827         if (kproc_create(xpt_scanner_thread, NULL, NULL, 0, 0, "xpt_thrd")) {
4828                 printf("xpt_config: failed to create rescan thread.\n");
4829         }
4830 }
4831
4832 void
4833 xpt_hold_boot(void)
4834 {
4835         xpt_lock_buses();
4836         xsoftc.buses_to_config++;
4837         xpt_unlock_buses();
4838 }
4839
4840 void
4841 xpt_release_boot(void)
4842 {
4843         xpt_lock_buses();
4844         xsoftc.buses_to_config--;
4845         if (xsoftc.buses_to_config == 0 && xsoftc.buses_config_done == 0) {
4846                 struct  xpt_task *task;
4847
4848                 xsoftc.buses_config_done = 1;
4849                 xpt_unlock_buses();
4850                 /* Call manually because we don't have any busses */
4851                 task = malloc(sizeof(struct xpt_task), M_CAMXPT, M_NOWAIT);
4852                 if (task != NULL) {
4853                         TASK_INIT(&task->task, 0, xpt_finishconfig_task, task);
4854                         taskqueue_enqueue(taskqueue_thread, &task->task);
4855                 }
4856         } else
4857                 xpt_unlock_buses();
4858 }
4859
4860 /*
4861  * If the given device only has one peripheral attached to it, and if that
4862  * peripheral is the passthrough driver, announce it.  This insures that the
4863  * user sees some sort of announcement for every peripheral in their system.
4864  */
4865 static int
4866 xptpassannouncefunc(struct cam_ed *device, void *arg)
4867 {
4868         struct cam_periph *periph;
4869         int i;
4870
4871         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
4872              periph = SLIST_NEXT(periph, periph_links), i++);
4873
4874         periph = SLIST_FIRST(&device->periphs);
4875         if ((i == 1)
4876          && (strncmp(periph->periph_name, "pass", 4) == 0))
4877                 xpt_announce_periph(periph, NULL);
4878
4879         return(1);
4880 }
4881
4882 static void
4883 xpt_finishconfig_task(void *context, int pending)
4884 {
4885
4886         periphdriver_init(2);
4887         /*
4888          * Check for devices with no "standard" peripheral driver
4889          * attached.  For any devices like that, announce the
4890          * passthrough driver so the user will see something.
4891          */
4892         if (!bootverbose)
4893                 xpt_for_all_devices(xptpassannouncefunc, NULL);
4894
4895         /* Release our hook so that the boot can continue. */
4896         config_intrhook_disestablish(xsoftc.xpt_config_hook);
4897         free(xsoftc.xpt_config_hook, M_CAMXPT);
4898         xsoftc.xpt_config_hook = NULL;
4899
4900         free(context, M_CAMXPT);
4901 }
4902
4903 cam_status
4904 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg,
4905                    struct cam_path *path)
4906 {
4907         struct ccb_setasync csa;
4908         cam_status status;
4909         int xptpath = 0;
4910
4911         if (path == NULL) {
4912                 mtx_lock(&xsoftc.xpt_lock);
4913                 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
4914                                          CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4915                 if (status != CAM_REQ_CMP) {
4916                         mtx_unlock(&xsoftc.xpt_lock);
4917                         return (status);
4918                 }
4919                 xptpath = 1;
4920         }
4921
4922         xpt_setup_ccb(&csa.ccb_h, path, CAM_PRIORITY_NORMAL);
4923         csa.ccb_h.func_code = XPT_SASYNC_CB;
4924         csa.event_enable = event;
4925         csa.callback = cbfunc;
4926         csa.callback_arg = cbarg;
4927         xpt_action((union ccb *)&csa);
4928         status = csa.ccb_h.status;
4929
4930         if (xptpath) {
4931                 xpt_free_path(path);
4932                 mtx_unlock(&xsoftc.xpt_lock);
4933         }
4934
4935         if ((status == CAM_REQ_CMP) &&
4936             (csa.event_enable & AC_FOUND_DEVICE)) {
4937                 /*
4938                  * Get this peripheral up to date with all
4939                  * the currently existing devices.
4940                  */
4941                 xpt_for_all_devices(xptsetasyncfunc, &csa);
4942         }
4943         if ((status == CAM_REQ_CMP) &&
4944             (csa.event_enable & AC_PATH_REGISTERED)) {
4945                 /*
4946                  * Get this peripheral up to date with all
4947                  * the currently existing busses.
4948                  */
4949                 xpt_for_all_busses(xptsetasyncbusfunc, &csa);
4950         }
4951
4952         return (status);
4953 }
4954
4955 static void
4956 xptaction(struct cam_sim *sim, union ccb *work_ccb)
4957 {
4958         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
4959
4960         switch (work_ccb->ccb_h.func_code) {
4961         /* Common cases first */
4962         case XPT_PATH_INQ:              /* Path routing inquiry */
4963         {
4964                 struct ccb_pathinq *cpi;
4965
4966                 cpi = &work_ccb->cpi;
4967                 cpi->version_num = 1; /* XXX??? */
4968                 cpi->hba_inquiry = 0;
4969                 cpi->target_sprt = 0;
4970                 cpi->hba_misc = 0;
4971                 cpi->hba_eng_cnt = 0;
4972                 cpi->max_target = 0;
4973                 cpi->max_lun = 0;
4974                 cpi->initiator_id = 0;
4975                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
4976                 strncpy(cpi->hba_vid, "", HBA_IDLEN);
4977                 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
4978                 cpi->unit_number = sim->unit_number;
4979                 cpi->bus_id = sim->bus_id;
4980                 cpi->base_transfer_speed = 0;
4981                 cpi->protocol = PROTO_UNSPECIFIED;
4982                 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
4983                 cpi->transport = XPORT_UNSPECIFIED;
4984                 cpi->transport_version = XPORT_VERSION_UNSPECIFIED;
4985                 cpi->ccb_h.status = CAM_REQ_CMP;
4986                 xpt_done(work_ccb);
4987                 break;
4988         }
4989         default:
4990                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
4991                 xpt_done(work_ccb);
4992                 break;
4993         }
4994 }
4995
4996 /*
4997  * The xpt as a "controller" has no interrupt sources, so polling
4998  * is a no-op.
4999  */
5000 static void
5001 xptpoll(struct cam_sim *sim)
5002 {
5003 }
5004
5005 void
5006 xpt_lock_buses(void)
5007 {
5008         mtx_lock(&xsoftc.xpt_topo_lock);
5009 }
5010
5011 void
5012 xpt_unlock_buses(void)
5013 {
5014         mtx_unlock(&xsoftc.xpt_topo_lock);
5015 }
5016
5017 static void
5018 camisr(void *dummy)
5019 {
5020         cam_simq_t queue;
5021         struct cam_sim *sim;
5022
5023         mtx_lock(&cam_simq_lock);
5024         TAILQ_INIT(&queue);
5025         while (!TAILQ_EMPTY(&cam_simq)) {
5026                 TAILQ_CONCAT(&queue, &cam_simq, links);
5027                 mtx_unlock(&cam_simq_lock);
5028
5029                 while ((sim = TAILQ_FIRST(&queue)) != NULL) {
5030                         TAILQ_REMOVE(&queue, sim, links);
5031                         CAM_SIM_LOCK(sim);
5032                         camisr_runqueue(sim);
5033                         sim->flags &= ~CAM_SIM_ON_DONEQ;
5034                         CAM_SIM_UNLOCK(sim);
5035                 }
5036                 mtx_lock(&cam_simq_lock);
5037         }
5038         mtx_unlock(&cam_simq_lock);
5039 }
5040
5041 static void
5042 camisr_runqueue(struct cam_sim *sim)
5043 {
5044         struct  ccb_hdr *ccb_h;
5045
5046         while ((ccb_h = TAILQ_FIRST(&sim->sim_doneq)) != NULL) {
5047                 int     runq;
5048
5049                 TAILQ_REMOVE(&sim->sim_doneq, ccb_h, sim_links.tqe);
5050                 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
5051
5052                 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE,
5053                           ("camisr\n"));
5054
5055                 runq = FALSE;
5056
5057                 if (ccb_h->flags & CAM_HIGH_POWER) {
5058                         struct highpowerlist    *hphead;
5059                         struct cam_ed           *device;
5060
5061                         mtx_lock(&xsoftc.xpt_lock);
5062                         hphead = &xsoftc.highpowerq;
5063
5064                         device = STAILQ_FIRST(hphead);
5065
5066                         /*
5067                          * Increment the count since this command is done.
5068                          */
5069                         xsoftc.num_highpower++;
5070
5071                         /*
5072                          * Any high powered commands queued up?
5073                          */
5074                         if (device != NULL) {
5075
5076                                 STAILQ_REMOVE_HEAD(hphead, highpowerq_entry);
5077                                 mtx_unlock(&xsoftc.xpt_lock);
5078
5079                                 xpt_release_devq_device(device,
5080                                                  /*count*/1, /*runqueue*/TRUE);
5081                         } else
5082                                 mtx_unlock(&xsoftc.xpt_lock);
5083                 }
5084
5085                 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
5086                         struct cam_ed *dev;
5087
5088                         dev = ccb_h->path->device;
5089
5090                         cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
5091                         sim->devq->send_active--;
5092                         sim->devq->send_openings++;
5093                         runq = TRUE;
5094
5095                         if (((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
5096                           && (dev->ccbq.dev_active == 0))) {
5097                                 dev->flags &= ~CAM_DEV_REL_ON_QUEUE_EMPTY;
5098                                 xpt_release_devq(ccb_h->path, /*count*/1,
5099                                                  /*run_queue*/FALSE);
5100                         }
5101
5102                         if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
5103                           && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ)) {
5104                                 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
5105                                 xpt_release_devq(ccb_h->path, /*count*/1,
5106                                                  /*run_queue*/FALSE);
5107                         }
5108
5109                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5110                          && (--dev->tag_delay_count == 0))
5111                                 xpt_start_tags(ccb_h->path);
5112                         if (!device_is_queued(dev)) {
5113                                 (void)xpt_schedule_devq(sim->devq, dev);
5114                         }
5115                 }
5116
5117                 if (ccb_h->status & CAM_RELEASE_SIMQ) {
5118                         xpt_release_simq(sim, /*run_queue*/TRUE);
5119                         ccb_h->status &= ~CAM_RELEASE_SIMQ;
5120                         runq = FALSE;
5121                 }
5122
5123                 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
5124                  && (ccb_h->status & CAM_DEV_QFRZN)) {
5125                         xpt_release_devq(ccb_h->path, /*count*/1,
5126                                          /*run_queue*/TRUE);
5127                         ccb_h->status &= ~CAM_DEV_QFRZN;
5128                 } else if (runq) {
5129                         xpt_run_devq(sim->devq);
5130                 }
5131
5132                 /* Call the peripheral driver's callback */
5133                 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
5134         }
5135 }