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